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Journal articles on the topic "AAV9 vector"

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Rutledge, Elizabeth A., Christine L. Halbert, and David W. Russell. "Infectious Clones and Vectors Derived from Adeno-Associated Virus (AAV) Serotypes Other Than AAV Type 2." Journal of Virology 72, no. 1 (January 1, 1998): 309–19. http://dx.doi.org/10.1128/jvi.72.1.309-319.1998.

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ABSTRACT Adeno-associated viruses (AAVs) are single-stranded dependent parvoviruses being developed as transducing vectors. Although at least five serotypes exist (AAV types 1 to 5 [AAV1 to -5]), only AAV2, AAV3, and AAV4 have been sequenced, and the vectors in use were almost all derived from AAV2. Here we report the cloning and sequencing of a second AAV3 genome and a new AAV serotype designated AAV6 that is related to AAV1. AAV2, AAV3, and AAV6 were 82% identical at the nucleotide sequence level, and AAV4 was 75 to 78% identical to these AAVs. Significant sequence variation was noted in portions of the capsid proteins that presumably are responsible for serotype-specific functions. Vectors produced from AAV3 and AAV6 differed from AAV2 vectors in host range and serologic reactivity. The AAV3 and AAV6 vector serotypes were able to transduce cells in the presence of serum from animals previously exposed to AAV2 vectors. Our results suggest that vectors based on alternative AAV serotypes will have advantages over existing AAV2 vectors, including the transduction of different cell types, and resistance to neutralizing antibodies against AAV2. This could be especially important for gene therapy, as significant immunity against AAV2 exists in human populations and many protocols will likely require multiple vector doses.
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Xin, Ke-Qin, Hiroaki Mizukami, Masashi Urabe, Yoshihiko Toda, Kaori Shinoda, Atsushi Yoshida, Kenji Oomura, et al. "Induction of Robust Immune Responses against Human Immunodeficiency Virus Is Supported by the Inherent Tropism of Adeno-Associated Virus Type 5 forDendritic Cells." Journal of Virology 80, no. 24 (September 27, 2006): 11899–910. http://dx.doi.org/10.1128/jvi.00890-06.

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ABSTRACT The ability of adeno-associated virus serotype 1 to 8 (AAV1 to AAV8) vectors expressing the human immunodeficiency virus type 1 (HIV-1) Env gp160 (AAV-HIV) to induce an immune response was evaluated in BALB/c mice. The AAV5 vector showed a higher tropism for both mouse and human dendritic cells (DCs) than did the AAV2 vector, whereas other AAV serotype vectors transduced DCs only poorly. AAV1, AAV5, AAV7, and AAV8 were more highly expressed in muscle cells than AAV2. An immunogenicity study of AAV serotypes indicates that AAV1, AAV5, AAV7, and AAV8 vectors expressing the Env gp160 gene induced higher HIV-specific humoral and cell-mediated immune responses than the AAV2 vector did, with the AAV5 vector producing the best responses. Furthermore, mice injected with DCs that had been transduced ex vivo with an AAV5 vector expressing the gp160 gene elicited higher HIV-specific cell-mediated immune responses than did DCs transduced with AAV1 and AAV2 vectors. We also found that AAV vectors produced by HEK293 cells and insect cells elicit similar levels of antigen-specific immune responses. These results demonstrate that the immunogenicity of AAV vectors depends on their tropism for both antigen-presenting cells (such as DCs) and non-antigen-presenting cells (such as muscular cells) and that AAV5 is a better vector than other AAV serotypes. These results may aid in the development of AAV-based vaccine and gene therapy.
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Chai, Zheng, Xintao Zhang, Amanda Lee Dobbins, Ellie Azure Frost, R. Jude Samulski, and Chengwen Li. "Chimeric Capsid Proteins Impact Transduction Efficiency of Haploid Adeno-Associated Virus Vectors." Viruses 11, no. 12 (December 9, 2019): 1138. http://dx.doi.org/10.3390/v11121138.

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Our previous studies have demonstrated that haploid AAV vectors made from capsids of two different serotypes induced high transduction and prevented serotype-specific antibody binding. In this study, we explored the transduction efficiency of several haploid viruses, which were made from the VP1/VP2 of one serotype and VP3 of another compatible serotype. After systemic injection of 2 × 1010 vg of AAV vectors into mice, the haploid AAV vectors, composed of VP1/VP2 from serotypes 8 or 9, and VP3 from AAV2, displayed a two to seven-fold increase in liver transduction compared with those of parental AAV2 vectors. Furthermore, a chimeric AAV2/8 VP1/VP2 with N-terminus of VP1/VP2 from AAV2 and C-terminus (VP3 domain) from AAV8 was constructed, and produced the haploid vector 28m-2VP3 with AAV2 VP3. The haploid 28m-2VP3 vector showed a five-fold higher transduction than that of the vectors composed solely of AAV2 VPs. Remarkably, the 28m-2VP3 vectors also induced a significant increase in transgene expression compared to the vectors composed of AAV8 VP1/VP2 with AAV2 VP3. The results suggest that the difference in the VP1/VP2 N-terminal region between AAV2 and AAV8 may allow better “communication” between the VP1/VP2 N-terminus of AAV2 with its cognate VP3. Similarly, the haploid vectors, VP1/VP2 from serotypes 8 or 9 and VP3 from AAV3, achieved higher transductions in multiple tissue types beyond typical tropism compared with those of AAV3 vectors. Consistently, higher vector genome copy numbers were detected in these tissues, indicating that an incorporation of non-cognate VP1/VP2 might influence the cellular tropism of the haploid vectors. However, there was no significant difference or even decreased transductions when compared with those of parental AAV8 or AAV9 vectors. In summary, these studies provide insight into current development strategies of AAV vectors that can increase AAV transduction across multiple tissues.
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Lin, Jianping, Yan Zhi, Lauren Mays, and James M. Wilson. "Vaccines Based on Novel Adeno-Associated Virus Vectors Elicit Aberrant CD8+ T-Cell Responses in Mice." Journal of Virology 81, no. 21 (August 22, 2007): 11840–49. http://dx.doi.org/10.1128/jvi.01253-07.

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ABSTRACT We recently discovered an expanded family of adeno-associated viruses (AAVs) that show promise as improved gene therapy vectors. In this study we evaluated the potential of vectors based on several of these novel AAVs as vaccine carriers for human immunodeficiency virus type 1 Gag. Studies with mice indicated that vectors based on AAV type 7 (AAV7), AAV8, and AAV9 demonstrate improved immunogenicity in terms of Gag CD8+ T-cell and Gag antibody responses. The quality of these antigen-specific responses was evaluated in detail for AAV2/8 vectors and compared to results with an adenovirus vector expressing Gag (AdC7). AAV2/8 produced a vibrant CD8+ T-cell effector response characterized by coexpression of gamma interferon and tumor necrosis factor alpha as well as in vivo cytolytic activity. No CD8+ T-cell response generated by any of the AAVs was effectively boosted with AdC7, a result consistent with the finding of a relative lack of cells expressing interleukin-2 (IL-2) or a central memory phenotype at 3 months after the prime. The primary response to an AdC7 vaccine differed from that generated by AAVs in that the peak effector response evolved into populations of Gag-specific T cells expressing high levels of cytokines, including IL-2, and with effector memory and central memory phenotypes. A number of mechanisms could be considered to explain the aberrant activation of CD8+ T cells by AAV, including insufficient inflammatory responses, CD4 help, and/or chronic antigen expression and T-cell exhaustion. Interestingly, the B-cell response to AAV-encoded Gag was quite vibrant and easily boosted with AdC7.
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Sabatino, Denise E., Amy M. Lange, Melinda Mucci, Rita Sarkar, Aaron M. Dillow, Timothy C. Nichols, Valder R. Arruda, and Haig H. Kazazian. "Long Term Dose-Dependent Correction of Hemophilia A Dogs Using AAV-8 and AAV-9-Mediated FVIII Gene Transfer." Blood 108, no. 11 (November 16, 2006): 999. http://dx.doi.org/10.1182/blood.v108.11.999.999.

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Abstract Hemophilia A (HA) is an X-linked bleeding disorder characterized by deficiency in clotting factor VIII (FVIII). Current treatment for hemophilia is protein replacement therapy while a gene-based therapy would provide continuous expression of even low levels of FVIII protein (>1% of normal) that is likely to improve the disease phenotype. It is challenging to utilize an AAV-mediated gene transfer approach for the FVIII cDNA (4.4kb) since the AAV vector can only efficiently accommodate a <5.3kb transgene cassette. The FVIII protein is composed of 2 chains -the heavy chain (HC) and the light chain (LC). FVIII undergoes proteolytic cleavage and processing of the 2 individual chains that form the active FVIII protein. In other studies in HA dogs (n=8), no dose-response and AAV serotype-dependent FVIII expression has been documented, which illustrates the difficulties in using a FVIII single-chain approach. We have utilized a 2-chain approach in which the 2.4kb LC cDNA is packaged in one AAV vector while the 2.5kb HC is packaged into a second AAV vector. Each construct contains a 695bp thyroxine-binding globulin gene promoter/enhancer fused to a 175bp intron along with a 263bp SV40 poly A signal. For this approach the LC and HC vectors packaged into either AAV8 or AAV9 were administered to HA dogs via the hepatic artery. Two male HA dogs received HC and LC in AAV8 and 2 male dogs received HC and LC in AAV9 at doses of 6x1012gc/vector/kg (low dose) or 1.25x1013gc/v/kg (high dose). At 150 days after vector infusion, the high dose group expressed FVIII at levels of 4.8% (AAV8) and 3% (AAV9) as detected by a functional assay (Coatest assay). FVIII remained stable for 797 days (AAV8) and >200 days (AAV9) (the longest time points to date) without any evidence of antibody formation to the transgene. In the low dose group at 150 days, FVIII levels were 1.5% (AAV8) and 0.5% (AAV9) cFVIII activity and were maintained in a follow up period of >150 days (AAV8) and >700 days (AAV9) without formation of antibodies to FVIII. Thus, no major differences between AAV8 and AAV9 vectors were observed. The transgene product is also functional based on shortening of whole blood clotting time (baseline values >50 min), in a dose-dependent manner, 10–15 min and 16–20 min for the high and low dose cohorts, respectively. Interestingly, high dose injection of AAV8 to 2 female HA dogs (1.25x1013 and 3x1013gc/v/kg) results in FVIII levels of 1–2%, which is consistent with data obtained in mice on the poor performance of AAV in mediating gene transfer to liver in female animals. Liver function tests and other blood chemistries were transiently elevated after the surgical procedure and were in normal limits within 4 days. Importantly, all dogs did not develop antibodies to FVIII. These findings suggest that FVIII chains efficiently assemble in vivo without increasing the protein immunogenicity. The 4 male dogs have remained asymptomatic with no spontaneous bleeds, whereas >20 bleeding episodes were expected for this group since untreated dogs require 5.5 plasma infusions/year. These data demonstrate for the first time, dose-dependent sustained expression of functional cFVIII in HA dogs by AAV8 and AAV9 vectors without formation of antibodies to cFVIII.
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Chen, Quan, Huan Luo, Chengcong Zhou, Huan Yu, Sai Yao, Fangda Fu, Rebecca Seeley, et al. "Comparative intra-articular gene transfer of seven adeno-associated virus serotypes reveals that AAV2 mediates the most efficient transduction to mouse arthritic chondrocytes." PLOS ONE 15, no. 12 (December 15, 2020): e0243359. http://dx.doi.org/10.1371/journal.pone.0243359.

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Osteoarthritis (OA) is the most common arthropathy, characterized by progressive degeneration of the articular cartilage. Currently, there are no disease-modifying approaches for OA treatment. Adeno-associated virus (AAV)-mediated gene therapy has recently become a potential treatment for OA due to its exceptional characteristics; however, the tropism and transduction efficiency of different AAV serotypes to articular joints and the safety profile of AAV applications are still unknown. The present study aims to screen an ideal AAV serotype to efficiently transfer genes to arthritic cartilage. AAV vectors of different serotypes expressing eGFP protein were injected into the knee joint cavities of mice, with all joint tissues collected 30 days after AAV injection. The transduction efficiency of AAVs was quantified by assessing the fluorescent intensities of eGFP in the cartilage of knee joints. Structural and morphological changes were analyzed by toluidine blue staining. Changes to ECM metabolism and pyroptosis of chondrocytes were determined by immunohistochemical staining. Fluorescence analysis of eGFP showed that eGFP was expressed in the cartilage of knee joints injected with each AAV vector. Quantification of eGFP intensity indicated that AAV2, 7 and 8 had the highest transduction efficiencies. Both toluidine blue staining and Mankin score showed that AAV6 aggravated cartilage degeneration. The analysis of key molecules in ECM metabolism suggested that AAV5 and 7 significantly reduced collagen type II, while AAV9 increased ADAMTS-4 but decreased MMP-19. In addition, transduction with AAV2, 5, 7 and 8 had no obvious effect on pyroptosis of chondrocytes. Comprehensive score analysis also showed that AAV2 had the highest score in intra-articular gene transfer. Collectively, our findings point to AAV2 as the best AAV serotype candidate for gene transfer on arthritic cartilage, resulting in minimal impact to ECM metabolism and pyroptosis of chondrocytes.
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Martini, Sabrina V., Adriana L. Silva, Debora Ferreira, Rafael Rabelo, Felipe M. Ornellas, Karina Gomes, Patricia R. M. Rocco, Hilda Petrs-Silva, and Marcelo M. Morales. "Tyrosine Mutation in AAV9 Capsid Improves Gene Transfer to the Mouse Lung." Cellular Physiology and Biochemistry 39, no. 2 (2016): 544–53. http://dx.doi.org/10.1159/000445646.

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Background/Aims: Adeno-associated virus (AAV) vectors are being increasingly used as the vector of choice for in vivo gene delivery and gene therapy for many pulmonary diseases. Recently, it was shown that phosphorylation of surface-exposed tyrosine residues from AAV capsid targets the viral particles for ubiquitination and proteasome-mediated degradation, and mutations of these tyrosine residues lead to highly efficient vector transduction in vitro and in vivo in different organs. In this study, we evaluated the pulmonary transgene expression efficacy of AAV9 vectors containing point mutations in surface-exposed capsid tyrosine residues. Methods: Eighteen C57BL/6 mice were randomly assigned into three groups: (1) a control group (CTRL) animals underwent intratracheal (i.t.) instillation of saline, (2) the wild-type AAV9 group (WT-AAV9, 1010 vg), and (3) the tyrosine-mutant Y731F AAV9 group (M-AAV9, 1010 vg), which received (i.t.) self-complementary AAV9 vectors containing the DNA sequence of enhanced green fluorescence protein (eGFP). Four weeks after instillation, lung mechanics, morphometry, tissue cellularity, gene expression, inflammatory cytokines, and growth factor expression were analyzed. Results: No significant differences were observed in lung mechanics and morphometry among the experimental groups. However, the number of polymorphonuclear cells was higher in the WT-AAV9 group than in the CTRL and M-AAV9 groups, suggesting that the administration of tyrosine-mutant AAV9 vectors was better tolerated. Tyrosine-mutant AAV9 vectors significantly improved transgene delivery to the lung (30%) compared with their wild-type counterparts, without eliciting an inflammatory response. Conclusion: Our results provide the impetus for further studies to exploit the use of AAV9 vectors as a tool for pulmonary gene therapy.
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Domenger, Claire, and Dirk Grimm. "Next-generation AAV vectors—do not judge a virus (only) by its cover." Human Molecular Genetics 28, R1 (July 2, 2019): R3—R14. http://dx.doi.org/10.1093/hmg/ddz148.

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AbstractRecombinant adeno-associated viruses (AAV) are under intensive investigation in numerous clinical trials after they have emerged as a highly promising vector for human gene therapy. Best exemplifying their power and potential is the authorization of three gene therapy products based on wild-type AAV serotypes, comprising Glybera (AAV1), Luxturna (AAV2) and, most recently, Zolgensma (AAV9). Nonetheless, it has also become evident that the current AAV vector generation will require improvements in transduction potency, antibody evasion and cell/tissue specificity to allow the use of lower and safer vector doses. To this end, others and we devoted substantial previous research to the implementation and application of key technologies for engineering of next-generation viral capsids in a high-throughput ‘top-down’ or (semi-)rational ‘bottom-up’ approach. Here, we describe a set of recent complementary strategies to enhance features of AAV vectors that act on the level of the recombinant cargo. As examples that illustrate the innovative and synergistic concepts that have been reported lately, we highlight (i) novel synthetic enhancers/promoters that provide an unprecedented degree of AAV tissue specificity, (ii) pioneering genetic circuit designs that harness biological (microRNAs) or physical (light) triggers as regulators of AAV gene expression and (iii) new insights into the role of AAV DNA structures on vector genome stability, integrity and functionality. Combined with ongoing capsid engineering and selection efforts, these and other state-of-the-art innovations and investigations promise to accelerate the arrival of the next generation of AAV vectors and to solidify the unique role of this exciting virus in human gene therapy.
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Boye, Sanford L., Antonette Bennett, Miranda L. Scalabrino, K. Tyler McCullough, Kim Van Vliet, Shreyasi Choudhury, Qing Ruan, James Peterson, Mavis Agbandje-McKenna, and Shannon E. Boye. "Impact of Heparan Sulfate Binding on Transduction of Retina by Recombinant Adeno-Associated Virus Vectors." Journal of Virology 90, no. 8 (February 10, 2016): 4215–31. http://dx.doi.org/10.1128/jvi.00200-16.

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ABSTRACTAdeno-associated viruses (AAVs) currently are being developed to efficiently transduce the retina following noninvasive, intravitreal (Ivt) injection. However, a major barrier encountered by intravitreally delivered AAVs is the inner limiting membrane (ILM), a basement membrane rich in heparan sulfate (HS) proteoglycan. The goal of this study was to determine the impact of HS binding on retinal transduction by Ivt-delivered AAVs. The heparin affinities of AAV2-based tyrosine-to-phenylalanine (Y-F) and threonine-to-valine (T-V) capsid mutants, designed to avoid proteasomal degradation during cellular trafficking, were established. In addition, the impact of grafting HS binding residues onto AAV1, AAV5, and AAV8(Y733F) as well as ablation of HS binding by AAV2-based vectors on retinal transduction was investigated. Finally, the potential relationship between thermal stability of AAV2-based capsids and Ivt-mediated transduction was explored. The results show that the Y-F and T-V AAV2 capsid mutants bind heparin but with slightly reduced affinity relative to that of AAV2. The grafting of HS binding increased Ivt transduction by AAV1 but not by AAV5 or AAV8(Y733F). The substitution of any canonical HS binding residues ablated Ivt-mediated transduction by AAV2-based vectors. However, these same HS variant vectors displayed efficient retinal transduction when delivered subretinally. Notably, a variant devoid of canonical HS binding residues, AAV2(4pMut)ΔHS, was remarkably efficient at transducing photoreceptors. The disparate AAV phenotypes indicate that HS binding, while critical for AAV2-based vectors, is not the sole determinant for transduction via the Ivt route. Finally, Y-F and T-V mutations alter capsid stability, with a potential relationship existing between stability and improvements in retinal transduction by Ivt injection.IMPORTANCEAAV has emerged as the vector of choice for gene delivery to the retina, with attention focused on developing vectors that can mediate transduction following noninvasive, intravitreal injection. HS binding has been postulated to play a role in intravitreally mediated transduction of retina. Our evaluation of the HS binding of AAV2-based variants and other AAV serotype vectors and the correlation of this property with transduction points to HS affinity as a factor controlling retinal transduction following Ivt delivery. However, HS binding is not the only requirement for improved Ivt-mediated transduction. We show that AAV2-based vectors lacking heparin binding transduce retina by subretinal injection and display a remarkable ability to transduce photoreceptors, indicating that other receptors are involved in this phenotype.
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Lins-Austin, Bridget, Saajan Patel, Mario Mietzsch, Dewey Brooke, Antonette Bennett, Balasubramanian Venkatakrishnan, Kim Van Vliet, et al. "Adeno-Associated Virus (AAV) Capsid Stability and Liposome Remodeling During Endo/Lysosomal pH Trafficking." Viruses 12, no. 6 (June 20, 2020): 668. http://dx.doi.org/10.3390/v12060668.

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Adeno-associated viruses (AAVs) are small, non-pathogenic ssDNA viruses being used as therapeutic gene delivery vectors for the treatment of a variety of monogenic diseases. An obstacle to successful gene delivery is inefficient capsid trafficking through the endo/lysosomal pathway. This study aimed to characterize the AAV capsid stability and dynamics associated with this process for a select number of AAV serotypes, AAV1, AAV2, AAV5, and AAV8, at pHs representative of the early and late endosome, and the lysosome (6.0, 5.5, and 4.0, respectively). All AAV serotypes displayed thermal melt temperatures that varied with pH. The stability of AAV1, AAV2, and AAV8 increased in response to acidic conditions and then decreased at pH 4.0. In contrast, AAV5 demonstrated a consistent decrease in thermostability in response to acidification. Negative-stain EM visualization of liposomes in the presence of capsids at pH 5.5 or when heat shocked showed induced remodeling consistent with the externalization of the PLA2 domain of VP1u. These observations provide clues to the AAV capsid dynamics that facilitate successful infection. Finally, transduction assays revealed a pH and temperature dependence with low acidity and temperatures > 4 °C as detrimental factors.
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Dissertations / Theses on the topic "AAV9 vector"

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Niemir, Natalia. "Gene transfer in the Sandhoff murine model using a specific recombinant AAV9 vector." Thesis, Paris 5, 2013. http://www.theses.fr/2013PA05S024/document.

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Likhite, Shibi B. "Therapeutic suppression of mutant SOD1 by AAV9-mediated gene therapy approach in Amyotrophic Lateral Sclerosis." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417394084.

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Kennedy, Zachary C. "Optimizing CRISPR/Cas9 for Gene Silencing of SOD1 in Mouse Models of ALS." eScholarship@UMMS, 2019. https://escholarship.umassmed.edu/gsbs_diss/1047.

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Mutations in the SOD1 gene are the best characterized genetic cause of amyotrophic lateral sclerosis (ALS) and account for ~20% of inherited cases and 1-3% of sporadic cases. The gene-editing tool Cas9 can silence mutant genes that cause disease, but effective delivery of CRISPR-Cas9 to the central nervous system (CNS) remains challenging. Here, I developed strategies using canonical Streptococcus pyogenes Cas9 to silence SOD1. In the first strategy, I demonstrate effectiveness of systemic delivery of guide RNA targeting SOD1 to the CNS in a transgenic mouse model expressing human mutant SOD1 and Cas9. Silencing was observed in both the brain and the spinal cord. In the second strategy, I demonstrate the effectiveness of delivering both guide RNA and Cas9 via two AAVs into the ventricles of the brain of SOD1G93A mice. Silencing was observed in the brain and in motor neurons within the spinal cord. For both strategies, treated mice had prolonged survival when compared to controls. Treated mice also had improvements in grip strength and rotarod function. For ICV treated mice, we detected a benefit of SOD1 silencing using net axonal transport assays, a novel method to detect motor neuron function in mice before onset of motor symptoms. These studies demonstrate that Cas9-mediated genome editing can mediate disease gene silencing in motor neurons and warrants further development for use as a therapeutic intervention for SOD1-linked ALS patients.
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Stoica, Lorelei I. "Gene Therapy for Amyotrophic Lateral Sclerosis: An AAV Delivered Artifical MicroRNA Against Human SOD1 Increases Survival and Delays Disease Progression of the SOD1G93A Mouse Model: A Dissertation." eScholarship@UMMS, 2015. http://escholarship.umassmed.edu/gsbs_diss/813.

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Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by loss of motor neurons, resulting in progressive muscle weakness, atrophy, paralysis and death within five years of diagnosis. About ten percent of cases are inherited, of which twenty percent are due to mutations in the superoxide dismutase 1 (SOD1) gene. Since the only FDA approved ALS drug prolongs survival by just a few months, new therapies for this disease are needed. Experiments in transgenic ALS mouse models have shown that decreasing levels of mutant SOD1 protein alters and in some cases entirely prevents disease progression. We explored this potential therapeutic approach by using a single stranded AAV9 vector encoding an artificial microRNA against human SOD1 injected bilaterally into the cerebral lateral ventricles of neonatal SOD1G93A mice. This therapy extended median survival from 135 to 206 days (a 50% increase) and delayed hind limb paralysis. Animals remained ambulatory until endpoint, as defined by a sharp drop in body weight. Treated animals had a reduction of mutant human SOD1 mRNA levels in upper and lower motor neurons. As compared to untreated SOD1G93A mice, the AAV9 treated mice also had significant improvements in multiple parameters including the number of motor neurons, diameter of ventral root axons, and degree of neuroinflammation in the spinal cord. These studies clearly show that an AAV9-delivered artificial microRNA is a translatable therapeutic approach for ALS.
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Pacouret, Simon. "Thermostability of Adeno-Associated Virus (AAV) Vectors." Thesis, Nantes, 2018. http://www.theses.fr/2018NANT1041/document.

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Les virus adéno-associés (AAVs) sont des virus à ADN simple brin, nonenveloppés, considérés comme des candidats de choix pour la thérapie génique. Pour augmenter les chances de succès des thérapies géniques basées sur l’AAV, des efforts sont actuellement faits pour développer de nouvelles capsides virales, qui seraient plus résistantes à l’immunité préexistante, plus spécifiques de certains tissus, et compatibles avec une production à grande échelle. L’un des défis posés par le développement de nouveaux vecteurs consiste à comprendre comment conférer de nouvelles fonctions biologiques aux capsides d’AAVs, sans compromettre leur intégrité structurale. Pour ce faire, il est nécessaire d’améliorer notre compréhension des mécanismes gouvernant la métastabilité des capsides d’AAVs. L’objectif de cette thèse était d’étudier la thermostabilité des AAVs, ses liens avec leurs propriétés biologiques, ainsi que ses applications dans le domaine du contrôle qualité des préparations d’AAVs recombinants Dans un premier temps, nous étendons les travaux existants à l’étude de virus AAVs ancestraux (AncAAVs), reconstruits in silico. Nous montrons que Anc80, l’ancêtre commun prédit d’AAV1, 2, 8 et 9, est plus thermostable que ses descendants (ΔT = 15-20°C). Nous identifions ensuite, par une analyse de type phénotype-phylogénie, 12 acides aminés jouant potentiellement un rôle important dans la stabilisation des capsides virales. Nous montrons ensuite que la thermostabilité des capsides d’AAVs, mesurée par fluorimétrie différentielle à balayage (DSF), est utile pour déterminer, à l’échelle protéique, l’identité des préparations de vecteurs viraux, une opération requise par les agences réglementaires. Pour finir, nous appliquons ce test d’identité à l’étude de l’homogénéité structurale des librairies d’AAVs. Ces travaux de thèse pourraient s’avérer utiles pour développement et le manufacturing de nouveaux AAVs recombinants pour la thérapie génique
Adeno-associated virus (AAV) vectors have emerged as promising gene delivery vehicles for gene therapy. To improve the probability of success of AAV-based therapeutic strategies, efforts are currently being made to engineer novel capsids able to produce and purify well, escape pre-existing immunity, and target specific cell populations more efficiently. One challenge in AAV vector engineering is to understand how to confer new functions to the viral capsid without altering its structural integrity. To do so, there is a critical need to gain further knowledge on the mechanisms steering AAV capsid metastability. The objective of this thesis is to investigate the thermal stability of AAVs, its impact on AAV biology, and applications to quality control of AAV preparations. First, we extend existing thermal stability studies to in silico reconstructed ancestral AAV particles (AncAAVs), and show that, Anc80, the common putative ancestor of AAV1, 2, 8 and 9, is 15-20°C more thermostable than its contemporary homologs. Using phenotype-tophylogeny mapping, we also identify a set of 12 residues potentially playing a key role in capsid metastability. Second, we demonstrate that capsid thermal stability, as measured by Differential Scanning Fluorimetry (DSF), can be used for identification of AAV preparations at the protein level, a requirement of regulatory agencies. Last, we apply this identity assay to the study of capsid mosaic formation in AAV library preparations. This work will help guide the engineering and manufacturing of improved AAV vectors for gene therapy
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Lauramore, Amanda K. "Retinal cell tropism of adeno-associated viral (aav) vector serotypes." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0005301.

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Thesis (M.S.)--University of Florida, 2004.
Typescript. Title from title page of source document. Document formatted into pages; contains 71 pages. Includes Vita. Includes bibliographical references.
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Crumrine, Jennette Kathleen. "Tissue tropisms of AAV vectors deficient in receptor binding." Connect to resource, 2005. http://hdl.handle.net/1811/440.

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Thesis (Honors)--Ohio State University, 2005.
Title from first page of PDF file. Document formattted into pages: contains 40 p.; also includes graphics. Includes bibliographical references (p. 39-40). Available online via Ohio State University's Knowledge Bank.
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Ploquin, Aurélie. "Les vecteurs AAV recombinants : un nouvel outil de vaccination contre les Hénipavirus." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00756311.

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Les virus Hendra (HeV) et Nipah (NiV) sont des virus émergents appartenant à la famille des Paramyxovirus et au genre des Hénipavirus. Chaque année, ils sont responsables de nombreuses épidémies touchant plusieurs espèces animales dont les hommes, avec une forte morbidité et mortalité. À ce jour, aucun vaccin ni traitement ne sont commercialisés. Ce projet porte sur le développement d'un vaccin génétique pour lutter contre une infection par les Hénipavirus. La stratégie suivie, repose sur l'injection in vivo de vecteurs recombinants dérivés du virus Adéno-Associé (AAVr) codant pour la glycoprotéine d'enveloppe G du virus NiV. Une première expérience réalisée chez la souris, a montré qu'une seule injection de vecteurs AAVr par voie IM permet le développement d'une réponse humorale contre la protéine G, forte et stable dans le temps. Afin de tester le pouvoir protecteur de ce vaccin, des hamsters ont été infectés par les Hénipavirus, compte tenu de leur grande sensibilité à ces infections. L'injection de vecteurs AAVr chez ces animaux a permis de protéger 100 % des animaux infectés par le virus NiV et 50 % des animaux infectés par le virus HeV. Cette étude apporte une nouvelle approche de vaccination et de nouvelles perspectives concernant l'utilisation des vecteurs AAVr pour lutter contre des infections virales émergentes.
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Rouvière, Laura. "Transfert de gènes dans un modèle murin de la maladie de Sandhoff à l'aide d'un vecteur scAAV9 : intérêt d'une double voie d'administration ?" Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB052/document.

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La maladie de Sandhoff est une maladie génétique rare due à des mutations du gène HEXB. Elle se caractérise par un double déficit en hexosaminidase A (αβ) et B (ββ), responsable d’une accumulation de ganglioside GM2 essentiellement dans le système nerveux central (SNC). Cliniquement, la maladie débute dès les premiers mois de vie et le décès survient vers l’âge de 3 ans. A ce jour, aucun traitement n’est disponible pour cette maladie. Le modèle murin obtenu par invalidation du gène Hexb est un bon outil pour le développement d’approches thérapeutiques, car il présente un phénotype proche de la maladie humaine. Le but principal de mon projet de thèse était d’explorer une approche de transfert de gène dans le modèle murin de la maladie de Sandhoff en utilisant un vecteur scAAV9. Ce vecteur a la particularité de pouvoir traverser la barrière hématoencéphalique et de transduire le SNC après administration intraveineuse (IV). Un vecteur codant la chaîne β des hexosaminidases, appelé scAAV9-Hexb, a précédemment été administré par voie IV à des souris en période néonatale à une dose de 3,5 x 1013 vg/kg. Les souris traitées ont survécu comme les souris normales (>700 jours) sans développer d’atteinte neurologique, ni périphérique alors que les souris Sandhoff non traitées sont décédées vers l’âge de 4 mois. J’ai réalisé toutes les analyses à long terme des souris traitées en utilisant des tests de comportements, ainsi que des analyses tissulaires 24 mois après le traitement. Une analyse lipidique par HPTLC a montré que la surcharge en ganglioside GM2 est totalement absente au niveau du cerveau (4 mois après l'injection), alors que dans le cervelet cette accumulation est non significative, mais pas totalement absente. Aucun symptôme lié à cette surcharge n’a été mis en évidence chez les souris à 24 mois, mais nous nous sommes posé la question d’un possible effet délétère à long terme en cas d’extrapolation à la clinique. Nous avons donc décidé de tester une double administration IV + ICV (intracérébroventriculaire) en utilisant le même vecteur et la même dose globale de façon à mieux corriger le cervelet. Deux groupes de souris ont été injectés en période néonatale en utilisant des doses différentes dans les deux compartiments. Les analyses ont montré que dans le cerveau, à court terme, la restauration de l’activité enzymatique est partielle, mais significative. Par ailleurs, il existe une absence totale de surcharge en GM2, ainsi qu’une correction des biomarqueurs associés à la maladie. Dans le cervelet, l’efficacité du traitement a été montrée seulement pour le groupe traité avec la dose la plus importante en ICV, ce qui suggère qu’une dose minimale en ICV est nécessaire pour atteindre de manière globale le SNC. Ces résultats ont été confirmés par l’analyse à long terme. Concernant le foie, nos résultats ont montré qu’une dose IV minimale est nécessaire pour obtenir une baisse de l’accumulation lipidique. Ce travail a permis de définir les doses minimales nécessaires dans chaque compartiment (IV et ICV) et il montre que la double administration peut être avantageuse pour traiter toutes les régions du SNC et notamment les plus atteintes, comme le cervelet. Il va maintenant nous permettre de traiter de façon optimale les souris adultes. L’autre but de mon projet était d’explorer les défauts de signalisation et la physiopathologie cellulaire dans la maladie de Sandhoff en utilisant des études in vivo et in vitro. Les études in vitro ont été réalisées sur des fibroblastes de patients et des cellules embryonnaires murines (MEF) obtenues à partir des souris Hexb-/- et la surcharge lysosomale a été confirmée dans ces cellules. La voie mTOR (mammalian target of rapamycin) a été analysée et nous avons montré qu’elle était dérégulée. L’activité autophagique a aussi été étudiée et nous avons mis en évidence une augmentation du nombre d’autophagosomes chez les souris Hexb-/- suggérant un défaut de cette voie. (...)
Sandhoff disease (SD) is a genetic disorder due to mutations in the HEXB gene. It is characterized by a double Hex A (αβ) and B (ββ) deficiency, responsible for a GM2 accumulation, mainly in the central nervous system (CNS). Clinically, SD begins in the first months of life and culminates in death around 3 years of age. So far, no specific treatment is available for Sandhoff disease. The murine model obtained by invalidation of the Hexb gene is a useful tool for the development of therapeutic approaches, as it exhibits a phenotype quite close to the human disease. The main aim of my PhD project was to explore a gene transfer approach in Sandhoff mice using a specific scAAV9. This vector has the particularity to cross the blood-brain barrier after intravenous (IV) administration and to transduce brain. A vector encoding the hexosaminidases β chain, called scAAV9-Hexb, has been previously IV injected in neonatal Hexb-/- mice with a dose of 3.5 x 1013 vg/kg. I participated to the long-term analysis of the scAAV9-Hexb treated mice using behavioral tests and analysis of tissues at 24 months post-injection. Mice had a survival similar to normal mice (>700 days) without neurological sign and peripheral damage by comparison with naïve Sandhoff mice (death around 120 days). At 4 months post-treatment, lipid analysis using HPTLC showed that GM2 storage was absent in brain, but it was only decreased in cerebellum of treated mice. Even if no symptom was associated with this residual storage in mice at 2 years, we wondered if it could possibly be pathogenic at longer-term if extrapolated to patients. Therefore, we decide to test a combined way of administration i.e. intravenous (IV) + intracerebroventricular (ICV) using the same vector with the same final dose. Two groups of mice were injected using different doses in both compartments and treatment efficacy was evaluated at short- and long-term. In the cerebrum, at short-term, enzymatic activities were partially but significantly restored, GM2 accumulation was completely prevented and disease biomarkers corrected. In the cerebellum, a significant increase of enzymatic activity was only obtained for the group treated with the highest dose in the ICV compartment. Regarding GM2 analysis and long-term behavioral analysis, we confirmed that this dose is required to cure cerebellum. In liver, our results suggest that IV minimal dose is needed to obtain a decrease of lipid accumulation. Our results showed that minimal doses are required in ICV and IV to obtain a good efficacy in each compartments, and that combined administration permit a widespread correction in the CNS. These data will permit to treat adult mice with the optimal treatment. The other goal of my project was to explore signaling defects and cellular pathophysiology in Sandhoff disease using in vivo and in vitro studies. For in vitro studies, fibroblasts from Tay-Sachs and Sandhoff patients were analyzed and mouse embryonic fibroblasts (MEF) were obtained from the Hexb-/- murine model, lysosomal storage was confirmed. mTOR (mammalian target of rapamycin) pathway was studied showing signaling deregulation. Autophagy was analyzed in vitro and in vivo, as defect in this pathway has been reported in other lysosomal storage disorders. An increase of autophagosomes number was observed in Hexb-/- subjects suggesting a defect in autophagy. These results offer novel biomarkers of Sandhoff pathology which can be useful to test the efficacy of therapeutic approaches. They can also provide new therapeutic targets that could be tested in combination with gene transfer
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Khabou, Hanen. "Development of safe and efficient aav vectors for retinal gene therapy." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS460.

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La vision est notre sens le plus cher et sa perte est un handicap redouté. Or, il existe un ensemble très hétérogène et complexe de dégénérescences rétiniennes héréditaires entraînant une perte de vision irréversible. Aujourd'hui, il n'y a pas de traitement pour ces maladies. Cependant, au cours de la dernière décennie, de nombreuses thérapies géniques ont été testées dans des essais cliniques, donnant de l'espoir pour le traitement des dégénérescences rétiniennes héréditaires. Dans cette thèse, nous avons exploré l'apport des vecteurs viraux dans le contexte général de la thérapie génique rétinienne. Nous avons plus particulièrement optimisé des vecteurs viraux pour des thérapies géniques indépendantes des mutations, largement applicables à toutes les dystrophies rétiniennes avec dégénérescence de bâtonnets puis cônes. Nous avons conçu des vecteurs pour cibler les cônes et étudié leur potentiel de translation pour l'activation optogénétique des cônes dans plusieurs systèmes modèles pertinents
Vision is our most cherished sense and its loss is a feared handicap. A highly diverse and complex array of inherited retinal degenerations leads to irreversible vision loss. Today, there is no cure for such disorders. However, in the last decade, many gene therapies entered clinical trials offering hope for the treatment of inherited retinal degenerations. In this thesis, we explored the contribution of viral vectors within the general context of retinal gene therapy. We focused on optimization of viral vectors for mutation-independent gene therapies broadly applicable across rod-cone dystrophies. We carefully designed vectors for targeting cones and studied their translational potential for optogenetic activation of cones in several relevant model systems
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Books on the topic "AAV9 vector"

1

Berns, Kenneth I., and Catherine Giraud, eds. Adeno-Associated Virus (AAV) Vectors in Gene Therapy. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2.

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Bartlett, Jeffrey S. Aav Virus and Vector Protocols. Humana Press, 2006.

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Adeno-Associated Virus (Aav) Vectors in Gene Therapy. Springer-Verlag Telos, 1996.

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Mingozzi, Federico, Hildegard Büning, Etiena Basner-Tschakarjan, and Anne Galy, eds. Immune responses to AAV vectors, from bench to bedside. Frontiers Media SA, 2015. http://dx.doi.org/10.3389/978-2-88919-500-8.

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Adeno-Associated Virus (Aav): Vectors in Gene Therapy (Current Topics in Microbiology and Immunology). Springer-Verlag, 1996.

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Book chapters on the topic "AAV9 vector"

1

Smith, Frances I., and Thomas J. McCown. "AAV Vectors." In Gene Therapy for Neurological Disorders and Brain Tumors, 83–92. Totowa, NJ: Humana Press, 1998. http://dx.doi.org/10.1007/978-1-59259-478-8_5.

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Sandro, Quentin, Karima Relizani, and Rachid Benchaouir. "AAV Production Using Baculovirus Expression Vector System." In Methods in Molecular Biology, 91–99. New York, NY: Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9065-8_5.

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Büning, Hildegard, Chelsea M. Bolyard, Michael Hallek, and Jeffrey S. Bartlett. "Modification and Labeling of AAV Vector Particles." In Adeno-Associated Virus, 273–300. Totowa, NJ: Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-370-7_12.

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Trapani, Ivana. "Dual AAV Vectors for Stargardt Disease." In Retinal Gene Therapy, 153–75. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7522-8_11.

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Guiner, Caroline Le, Phillipe Moullier, and Valder R. Arruda. "Biodistribution and Shedding of AAV Vectors." In Adeno-Associated Virus, 339–59. Totowa, NJ: Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-370-7_15.

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Berns, K. I., and C. Giraud. "Biology of Adeno-associated Virus." In Adeno-Associated Virus (AAV) Vectors in Gene Therapy, 1–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2_1.

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Chiorini, J. A., S. M. Wiener, L. Yang, R. H. Smith, B. Safer, N. P. Kilcoin, Y. Liu, E. Urcelay, and R. M. Kotin. "The Roles of AAV Rep Proteins in Gene Expression and Targeted Integration." In Adeno-Associated Virus (AAV) Vectors in Gene Therapy, 25–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2_2.

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Trempe, J. P. "Packaging Systems for Adeno-associated Virus Vectors." In Adeno-Associated Virus (AAV) Vectors in Gene Therapy, 35–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2_3.

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Lebkowski, J. S., T. B. Okarma, and R. Philip. "The Challenges of Recombinant Adeno-associated Virus Manufacturing: Alternative Use of Adeno-associated Virus Plasmid/Liposome Complexes for Gene Therapy Applications." In Adeno-Associated Virus (AAV) Vectors in Gene Therapy, 51–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2_4.

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Chatterjee, S., and K. K. Wong. "Adeno-associated Virus Vectors for Gene Therapy of the Hematopoietic System." In Adeno-Associated Virus (AAV) Vectors in Gene Therapy, 61–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80207-2_5.

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Conference papers on the topic "AAV9 vector"

1

Krotova, Karina, Andrew Day, Edward Hinchcliffe, and George Aslanidi. "Abstract 1467: Bioengineering AAV6 vector-based vaccine for cancer treatment." In Proceedings: AACR Annual Meeting 2019; March 29-April 3, 2019; Atlanta, GA. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.am2019-1467.

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Krotova, Karina, Andrew Day, Edward Hinchcliffe, and George Aslanidi. "Abstract 1467: Bioengineering AAV6 vector-based vaccine for cancer treatment." In Proceedings: AACR Annual Meeting 2019; March 29-April 3, 2019; Atlanta, GA. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.sabcs18-1467.

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Martini, Sabrina V., Adriana L. Silva, Miquéias Lopes-Pacheco, Hilda Petrs-Silva, Rafael Linden, Patricia R. M. Rocco, and Marcelo M. Morales. "The Efficiency Of Tyrosine-Mutant Adeno-Associated Viruses (AAVs) Serotype Vectors In Pulmonary Gene Therapy." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a4975.

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Pandy, Munjal, Kellee Britt, and George Aslanidi. "Abstract A072: Reprogramming immune response with capsid-optimized AAV vectors for immunotherapy of cancer." In Abstracts: CRI-CIMT-EATI-AACR Inaugural International Cancer Immunotherapy Conference: Translating Science into Survival; September 16-19, 2015; New York, NY. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/2326-6074.cricimteatiaacr15-a072.

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Zhang, H., X. Tang, C. Wang, and L. Sun. "AB0063 High-efficiency transduction of mesenchymal stem cells by aav2/dj vector for their potential use in autoimmune diseases." In Annual European Congress of Rheumatology, EULAR 2018, Amsterdam, 13–16 June 2018. BMJ Publishing Group Ltd and European League Against Rheumatism, 2018. http://dx.doi.org/10.1136/annrheumdis-2018-eular.5014.

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Jheel, Pandya, Kellee Britt, and George Aslanidi. "Abstract 714: Bioengineering of the adeno-associated virus (AAV) vectors for dendritic cell (DC)-based immunotherapy." In Proceedings: AACR Annual Meeting 2014; April 5-9, 2014; San Diego, CA. American Association for Cancer Research, 2014. http://dx.doi.org/10.1158/1538-7445.am2014-714.

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Sayroo, Rana, Zifei Yin, Diego Nolasco, Munjal Pandya, Chen Ling, and George Aslanidi. "Abstract 3534: Development of the novel AAV-based vectors with selective tropism to human cancer cells." In Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.am2015-3534.

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Pepin, David, Amanda Sosulski, Katherine Hendren, Li Hua Zhang, Fotini Nicolaou, Dan Wang, Guangping Gao, and Patricia K. Donahoe. "Abstract AS25: An adeno-associated virus (AAV) 9 vector delivering modified human mullerian inhibiting substance (MIS) as a gene therapy for ovarian cancer." In Abstracts: 10th Biennial Ovarian Cancer Research Symposium; September 8-9, 2014; Seattle, WA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1557-3265.ovcasymp14-as25.

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Miesbach, W., G. Castaman, N. S. Key, S. Lattimore, F. W. G. Leebeek, A. Von Drygalski, S. Zelenkofske, M. Recht, and S. W. Pipe. "Phase 2b Trial of AMT-061 (AAV5-Padua hFIX): Translation into Humans of an Enhanced Gene Transfer Vector for Adults with Severe or Moderate-severe Hemophilia B." In 63rd Annual Meeting of the Society of Thrombosis and Haemostasis Research. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1680141.

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