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1

Ikeda, Ryuji, Chikara Kokubu, Kosuke Yusa, Vincent W. Keng, Kyoji Horie, and Junji Takeda. "Sleeping Beauty Transposase Has an Affinity for Heterochromatin Conformation." Molecular and Cellular Biology 27, no. 5 (2006): 1665–76. http://dx.doi.org/10.1128/mcb.01500-06.

Повний текст джерела
Анотація:
ABSTRACT The Sleeping Beauty (SB) transposase reconstructed from salmonid fish has high transposition activity in mammals and has been a useful tool for insertional mutagenesis and gene delivery. However, the transposition efficiency has varied significantly among studies. Our previous study demonstrated that the introduction of methylation into the SB transposon enhanced transposition, suggesting that transposition efficiency is influenced by the epigenetic status of the transposon region. Here, we examined the influence of the chromatin status on SB transposition in mouse embryonic stem cell
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2

Fili, A. E., A. P. Alessio, W. Garrels, et al. "242 HIGHLY EFFICIENT SLEEPING BEAUTY TRANSPOSON-MEDIATED TRANSGENESIS IN BOVINE FETAL FIBROBLASTS." Reproduction, Fertility and Development 28, no. 2 (2016): 253. http://dx.doi.org/10.1071/rdv28n2ab242.

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Анотація:
Active transposon-mediated transgenesis is an emerging tool for basic and applied research in livestock. We have demonstrated the effectiveness of a helper-independent piggyBac transposon (pGENIE-3) for gene transfer into the genome of bovine cells (Alessio et al. 2014 Reprod. Domest. Anim. 49, 8). Here, we extend our previous research by examining the suitability of a Sleeping Beauty (SB) transposon-based methodology to deliver transgenes into the genome of bovine fetal fibroblasts (BFF), and the ability of these cells to support in vitro embryo development upon somatic cell nuclear transfer
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3

Yant, Stephen R., Julie Park, Yong Huang, Jacob Giehm Mikkelsen, and Mark A. Kay. "Mutational Analysis of the N-Terminal DNA-Binding Domain of Sleeping Beauty Transposase: Critical Residues for DNA Binding and Hyperactivity in Mammalian Cells." Molecular and Cellular Biology 24, no. 20 (2004): 9239–47. http://dx.doi.org/10.1128/mcb.24.20.9239-9247.2004.

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Анотація:
ABSTRACT The N-terminal domain of the Sleeping Beauty (SB) transposase mediates transposon DNA binding, subunit multimerization, and nuclear translocation in vertebrate cells. For this report, we studied the relative contributions of 95 different residues within this multifunctional domain by large-scale mutational analysis. We found that each of four amino acids (leucine 25, arginine 36, isoleucine 42, and glycine 59) contributes to DNA binding in the context of the N-terminal 123 amino acids of SB transposase, as indicated by electrophoretic mobility shift analysis, and to functional activit
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4

Converse, Andrea D., Lalitha R. Belur, Jennifer L. Gori, et al. "Counterselection and Co-Delivery of Transposon and Transposase Functions for Sleeping Beauty-Mediated Transposition in Cultured Mammalian Cells." Bioscience Reports 24, no. 6 (2004): 577–94. http://dx.doi.org/10.1007/s10540-005-2793-9.

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Анотація:
Sleeping Beauty (SB) is a gene-insertion system reconstructed from transposon sequences found in teleost fish and is capable of mediating the transposition of DNA sequences from transfected plasmids into the chromosomes of vertebrate cell populations. The SB system consists of a transposon, made up of a gene of interest flanked by transposon inverted repeats, and a source of transposase. Here we carried out a series of studies to further characterize SB-mediated transposition as a tool for gene transfer to chromosomes and ultimately for human gene therapy. Transfection of mouse 3T3 cells, HeLa
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5

Huang, Xin, Andrew C. Wilber, Lei Bao, et al. "Stable gene transfer and expression in human primary T cells by the Sleeping Beauty transposon system." Blood 107, no. 2 (2006): 483–91. http://dx.doi.org/10.1182/blood-2005-05-2133.

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Анотація:
AbstractThe Sleeping Beauty (SB) transposon system is a nonviral DNA delivery system in which a transposase directs integration of an SB transposon into TA-dinucleotide sites in the genome. To determine whether the SB transposon system can mediate stable gene expression in human T cells, primary peripheral blood lymphocytes (PBLs) were nucleofected with SB vectors carrying a DsRed reporter gene. Plasmids containing the SB transposase on the same molecule as (cis) or on a molecule separate from (trans) the SB transposon mediated long-term and stable reporter gene expression in human primary T c
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6

Zhou, Xianzheng, Xin Huang, Andrew C. Wilber, et al. "Stable Gene Transfer and Expression in Human Primary T-Cells by the Sleeping Beauty Transposon System." Blood 106, no. 11 (2005): 5539. http://dx.doi.org/10.1182/blood.v106.11.5539.5539.

Повний текст джерела
Анотація:
Abstract The Sleeping Beauty (SB) transposon system is a non-viral DNA delivery system in which a transposase directs integration of an SB transposon into TA-dinucleotide sites in the genome. To determine whether the SB transposon system can mediate integration and long-term transgene expression in human primary T-cells, freshly isolated peripheral blood lymphocytes (PBLs) without prior activation were nucleofected with SB vectors carrying a DsRed reporter gene. Plasmids containing the SB transposase on the same (cis) (n=10) or separate molecule (trans) (n=8) as the SB transposon mediated long
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7

Miskey, Csaba, Lisa Kesselring, Irma Querques, György Abrusán, Orsolya Barabas, and Zoltán Ivics. "Engineered Sleeping Beauty transposase redirects transposon integration away from genes." Nucleic Acids Research 50, no. 5 (2022): 2807–25. http://dx.doi.org/10.1093/nar/gkac092.

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Анотація:
Abstract The Sleeping Beauty (SB) transposon system is a popular tool for genome engineering, but random integration into the genome carries a certain genotoxic risk in therapeutic applications. Here we investigate the role of amino acids H187, P247 and K248 in target site selection of the SB transposase. Structural modeling implicates these three amino acids located in positions analogous to amino acids with established functions in target site selection in retroviral integrases and transposases. Saturation mutagenesis of these residues in the SB transposase yielded variants with altered targ
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8

Kesselring, Lisa, Csaba Miskey, Cecilia Zuliani, et al. "A single amino acid switch converts the Sleeping Beauty transposase into an efficient unidirectional excisionase with utility in stem cell reprogramming." Nucleic Acids Research 48, no. 1 (2019): 316–31. http://dx.doi.org/10.1093/nar/gkz1119.

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Анотація:
Abstract The Sleeping Beauty (SB) transposon is an advanced tool for genetic engineering and a useful model to investigate cut-and-paste DNA transposition in vertebrate cells. Here, we identify novel SB transposase mutants that display efficient and canonical excision but practically unmeasurable genomic re-integration. Based on phylogenetic analyses, we establish compensating amino acid replacements that fully rescue the integration defect of these mutants, suggesting epistasis between these amino acid residues. We further show that the transposons excised by the exc+/int− transposase mutants
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9

Yusa, Kosuke, Junji Takeda, and Kyoji Horie. "Enhancement of Sleeping Beauty Transposition by CpG Methylation: Possible Role of Heterochromatin Formation." Molecular and Cellular Biology 24, no. 9 (2004): 4004–18. http://dx.doi.org/10.1128/mcb.24.9.4004-4018.2004.

Повний текст джерела
Анотація:
ABSTRACT The Sleeping Beauty (SB) transposase is the most active transposase in vertebrate cells, and the SB transposon system has been used as a tool for insertional mutagenesis and gene delivery. Previous studies have indicated that the frequency of chromosomal transposition is considerably higher in mouse germ cells than in mouse embryonic stem cells, suggesting the existence of unknown mechanisms that regulate SB transposition. Here, we demonstrated that CpG methylation of the transposon region enhances SB transposition. The transposition efficiencies of a methylated transposon and an unme
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10

Yant, Stephen R., and Mark A. Kay. "Nonhomologous-End-Joining Factors Regulate DNA Repair Fidelity during Sleeping Beauty Element Transposition in Mammalian Cells." Molecular and Cellular Biology 23, no. 23 (2003): 8505–18. http://dx.doi.org/10.1128/mcb.23.23.8505-8518.2003.

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Анотація:
ABSTRACT Herein, we report that the DNA-dependent protein kinase (DNA-PK) regulates the DNA damage introduced during Sleeping Beauty (SB) element excision and reinsertion in mammalian cells. Using both plasmid- and chromosome-based mobility assays, we analyzed the repair of transposase-induced double-stranded DNA breaks in cells deficient in either the DNA-binding subunit of DNA-PK (Ku) or its catalytic subunit (DNA-PKcs). We found that the free 3′ overhangs left after SB element excision were efficiently and accurately processed by the major Ku-dependent nonhomologous-end-joining pathway. Rej
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11

Sumiyoshi, Teiko, Roger P. Hollis, Nathalia Holt, and Donald B. Kohn. "Optimization of the Sleeping Beauty Transposon System to Achieve Stable Transgene Expression in Human CD34+ Hematopoietic Progenitor Cells." Blood 112, no. 11 (2008): 3527. http://dx.doi.org/10.1182/blood.v112.11.3527.3527.

Повний текст джерела
Анотація:
Abstract Sleeping Beauty (SB) transposon-mediated integration has been shown to achieve long-term transgene expression in a wide range of host cells. Transposon-mediated gene integration may have advantages over viral vectors, with a greater transgene carrying capacity and potentially safer integration site profile. Due to these characteristics of SB, there has been great interest in its potential use in hematopoietic stem cell (HSC) gene therapy. In this study, we optimized the SB transposon-mediated gene transfer system to achieve higher stable transgene expression in K562 human erythroleuke
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12

Xue, Xingkui, Xin Huang, Sonja E. Nodland, et al. "Stable gene transfer and expression in cord blood–derived CD34+ hematopoietic stem and progenitor cells by a hyperactive Sleeping Beauty transposon system." Blood 114, no. 7 (2009): 1319–30. http://dx.doi.org/10.1182/blood-2009-03-210005.

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Анотація:
Abstract Here we report stable gene transfer in cord blood-derived CD34+ hematopoietic stem cells using a hyperactive nonviral Sleeping Beauty (SB) transposase (SB100X). In colony-forming assays, SB100X mediated the highest efficiency (24%) of stable Discosoma sp red fluorescent protein (DsRed) reporter gene transfer in committed hematopoietic progenitors compared with both the early-generation hyperactive SB11 transposase and the piggyBac transposon system (1.23% and 3.8%, respectively). In vitro differentiation assays further demonstrated that SB100X-transfected CD34+ cells can develop into
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13

Jia, Wenzhu, Emmanuel Asare, Tao Liu, et al. "Horizontal Transfer and Evolutionary Profiles of Two Tc1/DD34E Transposons (ZB and SB) in Vertebrates." Genes 13, no. 12 (2022): 2239. http://dx.doi.org/10.3390/genes13122239.

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Анотація:
Both ZeBrafish (ZB), a recently identified DNA transposon in the zebrafish genome, and SB, a reconstructed transposon originally discovered in several fish species, are known to exhibit high transposition activity in vertebrate cells. Although a similar structural organization was observed for ZB and SB transposons, the evolutionary profiles of their homologs in various species remain unknown. In the present study, we compared their taxonomic ranges, structural arrangements, sequence identities, evolution dynamics, and horizontal transfer occurrences in vertebrates. In total, 629 ZB and 366 SB
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14

Ochmann, Matthias T., and Zoltán Ivics. "Jumping Ahead with Sleeping Beauty: Mechanistic Insights into Cut-and-Paste Transposition." Viruses 13, no. 1 (2021): 76. http://dx.doi.org/10.3390/v13010076.

Повний текст джерела
Анотація:
Sleeping Beauty (SB) is a transposon system that has been widely used as a genetic engineering tool. Central to the development of any transposon as a research tool is the ability to integrate a foreign piece of DNA into the cellular genome. Driven by the need for efficient transposon-based gene vector systems, extensive studies have largely elucidated the molecular actors and actions taking place during SB transposition. Close transposon relatives and other recombination enzymes, including retroviral integrases, have served as useful models to infer functional information relevant to SB. Rece
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15

Ochmann, Matthias T., and Zoltán Ivics. "Jumping Ahead with Sleeping Beauty: Mechanistic Insights into Cut-and-Paste Transposition." Viruses 13, no. 1 (2021): 76. http://dx.doi.org/10.3390/v13010076.

Повний текст джерела
Анотація:
Sleeping Beauty (SB) is a transposon system that has been widely used as a genetic engineering tool. Central to the development of any transposon as a research tool is the ability to integrate a foreign piece of DNA into the cellular genome. Driven by the need for efficient transposon-based gene vector systems, extensive studies have largely elucidated the molecular actors and actions taking place during SB transposition. Close transposon relatives and other recombination enzymes, including retroviral integrases, have served as useful models to infer functional information relevant to SB. Rece
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16

Singh, Harjeet, Pallavi R. Manuri, Simon Olivares, et al. "CD19-Specific T Cells for Treatment of Pediatric Acute Lymphocytic Leukemia Using Sleeping Beauty Transposition." Blood 110, no. 11 (2007): 2820. http://dx.doi.org/10.1182/blood.v110.11.2820.2820.

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Анотація:
Abstract Genetic modification of clinical-grade T cells is undertaken to augment function, including redirecting specificity for desired antigen. We and others have introduced a chimeric antigen receptor (CAR) to enable T cells to recognize lineage-specific tumor antigen, such as CD19, and early-phase human trials are currently assessing safety and feasibility. However, a significant barrier to next-generation clinical studies is developing a suitable CAR-expression vector capable of genetically modifying a broad population of T cells. Transduction of T cells is relatively efficient, but it re
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17

Kebriaei, Partow, Helen Huls, Harjeet Singh, et al. "Adoptive Therapy Using Sleeping Beauty Gene Transfer System and Artificial Antigen Presenting Cells to Manufacture T Cells Expressing CD19-Specific Chimeric Antigen Receptor." Blood 124, no. 21 (2014): 311. http://dx.doi.org/10.1182/blood.v124.21.311.311.

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Анотація:
Abstract Objectives: T cells can be genetically modified ex vivo to redirect specificity upon expression of a chimeric antigen receptor (CAR) that recognizes tumor-associated antigen (TAA) independent of human leukocyte antigen. We employ non-viral gene transfer using the Sleeping Beauty (SB) transposon/transposase system to stably express a 2nd generation CD19-specific CAR- (designated CD19RCD28 that activates via CD3z/CD28) in patient (pt)- or donor-derived T cells for patients with advanced B-cell malignancies. Methods: T cells were electroporated using a Nucleofector device to synchronousl
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18

VandenDriessche, Thierry, Zoltán Ivics, Zsuzsanna Izsvák, and Marinee K. L. Chuah. "Emerging potential of transposons for gene therapy and generation of induced pluripotent stem cells." Blood 114, no. 8 (2009): 1461–68. http://dx.doi.org/10.1182/blood-2009-04-210427.

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Анотація:
AbstractEffective gene therapy requires robust delivery of the desired genes into the relevant target cells, long-term gene expression, and minimal risks of secondary effects. The development of efficient and safe nonviral vectors would greatly facilitate clinical gene therapy studies. However, nonviral gene transfer approaches typically result in only limited stable gene transfer efficiencies in most primary cells. The use of nonviral gene delivery approaches in conjunction with the latest generation transposon technology based on Sleeping Beauty (SB) or piggyBac transposons may potentially o
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19

Carlson, Corey M., Adam J. Dupuy, Sabine Fritz, Kevin J. Roberg-Perez, Colin F. Fletcher, and David A. Largaespada. "Transposon Mutagenesis of the Mouse Germline." Genetics 165, no. 1 (2003): 243–56. http://dx.doi.org/10.1093/genetics/165.1.243.

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Анотація:
Abstract Sleeping Beauty is a synthetic “cut-and-paste” transposon of the Tc1/mariner class. The Sleeping Beauty transposase (SB) was constructed on the basis of a consensus sequence obtained from an alignment of 12 remnant elements cloned from the genomes of eight different fish species. Transposition of Sleeping Beauty elements has been observed in cultured cells, hepatocytes of adult mice, one-cell mouse embryos, and the germline of mice. SB has potential as a random germline insertional mutagen useful for in vivo gene trapping in mice. Previous work in our lab has demonstrated transpositio
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20

Ohlfest, John R., Joel L. Frandsen, Sabine Fritz, et al. "Phenotypic correction and long-term expression of factor VIII in hemophilic mice by immunotolerization and nonviral gene transfer using the Sleeping Beauty transposon system." Blood 105, no. 7 (2005): 2691–98. http://dx.doi.org/10.1182/blood-2004-09-3496.

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Анотація:
AbstractHemophilia A is a lead candidate for treatment by gene therapy because small increments in the missing secreted protein product, coagulation factor VIII (FVIII), would result in substantial clinical amelioration. Clinically relevant therapy might be achieved by stably delivering a human FVIII cDNA to correct the bleeding disorder. We used the Sleeping Beauty (SB) transposon, delivered as naked plasmid DNA by tail-vein injection, to integrate B-domain–deleted FVIII genes into the chromosomes of hemophilia A mice and correct the phenotype. Since FVIII protein is a neoantigen to these mic
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21

Kebriaei, Partow, Helen Huls, Harjeet Singh, et al. "First Clinical Trials Employing Sleeping Beauty Gene Transfer System and Artificial Antigen Presenting Cells To Generate and Infuse T Cells Expressing CD19-Specific Chimeric Antigen Receptor." Blood 122, no. 21 (2013): 166. http://dx.doi.org/10.1182/blood.v122.21.166.166.

Повний текст джерела
Анотація:
Abstract Background T cells can be genetically modified ex vivo to redirect specificity upon enforced expression of a chimeric antigen receptor (CAR) that recognizes tumor-associated antigen (TAA) independent of human leukocyte antigen. We report a new approach to non-viral gene transfer using the Sleeping Beauty (SB) transposon/transposase system to stably express a 2nd generation CD19-specific CAR- (designated CD19RCD28 that activates via CD3z/CD28) in autologous and allogeneic T cells manufactured in compliance with current good manufacturing practice (cGMP) for Phase I/II trials. Methods T
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22

Vercellotti, Gregory M., Ping Zhang, Chunsheng Chen, et al. "Hemopexin Gene Therapy Inhibits Inflammation and Vaso-Occlusion in Transgenic Sickle Cell Mice." Blood 126, no. 23 (2015): 412. http://dx.doi.org/10.1182/blood.v126.23.412.412.

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Анотація:
Abstract Hemolysis, oxidative stress, inflammation, vaso-occlusion, and organ infarction are hallmarks of sickle cell disease (SCD). Hemolysis releases free hemoglobin (Hb) and Hb-containing microparticles into the vasculature that upon oxidation to methemoglobin frees heme from the globin, which in turn can promote oxidative stress and activate toll-like receptor 4 (TLR4) signaling. Hemopexin (HPX), a plasma β1-glycoprotein, binds heme with a very high affinity (Kd < 10-12 M), and transports it to the liver for catabolism via CD91 receptor-mediated uptake. SCD patients have low serum HPX l
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23

Kebriaei, Partow, Helen Huls, Harjeet Singh, et al. "Adoptive Immunotherapy Following Umbilical Cord Blood Transplantation Using The Sleeping Beauty System and Artificial Antigen Presenting Cells To Generate Donor-Derived T Cells Expressing a CD19-Specific Chimeric Antigen Receptor." Blood 122, no. 21 (2013): 4208. http://dx.doi.org/10.1182/blood.v122.21.4208.4208.

Повний текст джерела
Анотація:
Abstract Background The ability to transplant across HLA disparities makes allogeneic umbilical cord blood (UCB) an attractive graft source for hematopoietic stem-cell transplantation (HSCT). Disease relapse remains a limitation, and adoptive transfer of tumor-specific T cells post UCB HSCT has not been feasible due to the functionally naïve CB T cells, and the small size as well as anonymity of the donor. We report a new approach to non-viral gene transfer using the Sleeping Beauty (SB) transposon/transposase system to stably express a 2nd generation CD19-specific chimeric antigen receptor (C
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24

Bexte, Tobias, Lacramioara Botezatu, Csaba Miskey, et al. "Non-Viral Sleeping Beauty Transposon Engineered CD19-CAR-NK Cells Show a Safe Genomic Integration Profile and High Antileukemic Efficiency." Blood 138, Supplement 1 (2021): 2797. http://dx.doi.org/10.1182/blood-2021-153999.

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Анотація:
Abstract Background: Natural Killer (NK) cells are known for their high intrinsic cytotoxic capacity. Recently, we and others showed that virally transduced NK cells equipped with a synthetic chimeric antigen receptor (CAR) targeting CD19 induced enhanced killing of acute lymphoblastic leukemia (ALL) cells. Here, we demonstrate for the first time that primary NK cells can be engineered using the non-viral Sleeping Beauty (SB) transposon/transposase system to stably express a CD19-CAR with a safe genomic integration profile and high anti-leukemic efficiency in vitro and in vivo. Methods: Primar
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25

Giotopoulos, George, Louise Van Der Weyden, Hikari Osaki, et al. "Modelling Cellular and Molecular Progression Of CML In The Mouse." Blood 122, no. 21 (2013): 2706. http://dx.doi.org/10.1182/blood.v122.21.2706.2706.

Повний текст джерела
Анотація:
Abstract Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm, caused by a reciprocal chromosomal translocation that generates the BCR-ABL fusion protein, a constitutively activated tyrosine kinase. Patients with CML usually present in an indolent chronic phase (CP), however, if left untreated, they irrevocably progress to an aggressive form of acute leukemia, termed blast crisis (BC) that is usually fatal. Tyrosine kinase inhibitor (TKI) (e.g. Imatinib) treatment has revolutionised the treatment of CML CP. However, ∼5-10% of CP patients will progress to BC despite TKI treatment, an
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26

Petkov, S., M. Nowak-Imialek, P. Hyttel, and H. Niemann. "307 REPROGRAMMING OF PIG SOMATIC CELLS TO PLURIPOTENCY WITH SLEEPING BEAUTY TRANSPOSON VECTORS CONTAINING THE PORCINE TRANSCRIPTION FACTOR SEQUENCES." Reproduction, Fertility and Development 25, no. 1 (2013): 300. http://dx.doi.org/10.1071/rdv25n1ab307.

Повний текст джерела
Анотація:
Induced pluripotent stem cells (iPSC), developed by Yamanaka and co-workers (Takahashi et al., 2006), hold significant potential for the development of regenerative therapies due to the possibilities of deriving patient-specific pluripotent cells. In this aspect, the pig is an important animal model for testing iPSC-based applications for the human medicine. However, even though significant progress has been made, the derivation of porcine iPSC lines fully equivalent to those from mouse and human has been elusive. To date, most of the reported putative pig iPSC lines have been derived with the
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27

Tolar, Jakub, Mark Osborn, Scott Bell, et al. "Transgenesis of Multipotent Adult Progenitor Cells (MAPC) with Sleeping Beauty Transposons to Determine MAPC Homing and Persistence in Real-Time In Vivo." Blood 104, no. 11 (2004): 2099. http://dx.doi.org/10.1182/blood.v104.11.2099.2099.

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Анотація:
Abstract MAPC are non-hematopoietic stem cells with the capacity to form most, if not all, cell types of the body. To date, the observations of homing of the MAPC have been limited to post mortem analyses. As MAPC may be useful in cellular therapies, our goal was to map their biodistribution in live organisms. To determine the real-time organ-specific homing pattern of donor MAPC, MAPC (from BM of C57BL/6J-rosa26 mice) were co-nucleofected with cDNAs encoding the red fluorescent protein DsRed2 and luciferase, using the Sleeping Beauty (SB) transposon system. Non-viral gene transfer mediated by
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28

Garrels, W., T. R. Talluri, R. Bevacqua, et al. "356 SLEEPING BEAUTY TRANSGENESIS IN CATTLE." Reproduction, Fertility and Development 27, no. 1 (2015): 266. http://dx.doi.org/10.1071/rdv27n1ab356.

Повний текст джерела
Анотація:
Transposon-mediated transgenesis is a well-established tool for genome modification in small animal models. However, translation of this active transgenic method to large animals warrants further investigations. Here, the Sleeping Beauty (SB) transposon system was assessed for stable gene transfer into the cattle genome. The transposon plasmids encoded a ubiquitously active CAGGS promoter-driven Venus reporter and a lens-specific α A-crystallin promoter driven tdTomato fluorophore, respectively. The helper plasmid carried the hyperactive SB100x transposase variant. In total, 50 in vitro-derive
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29

Ahrens, H. E., B. Petersen, S. Petkov, J. Hauschild-Quintern, and H. Niemann. "325 PRODUCTION OF GAL KNOCKOUT/hA20 TRANSGENIC PIGS WITH IMPROVED XENOPROTECTIVE PROPERTIES." Reproduction, Fertility and Development 25, no. 1 (2013): 310. http://dx.doi.org/10.1071/rdv25n1ab325.

Повний текст джерела
Анотація:
Pig-to-human xenotransplantation is promising for overcoming the shortage of suitable human donor organs, but is hampered by immunological barriers. The next immunological hurdle is the acute vascular rejection (AVR), which is associated with activation of the endothelium and the coagulation system. Recently, we demonstrated that transgenic expression of the zinc finger protein A20 protects porcine cells against apoptotic and inflammatory stimuli (Oropeza et al. 2009 Xenotransplantation 16, 522–534). Compared with other anti-apoptotic proteins, A20 also has immune-modulatory potential as shown
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30

Rotiroti, Maria Caterina, Chiara Buracchi, Silvia Arcangeli, et al. "Preclinical Assessment of Non-Virally Engineered CD33.CAR Cytokine-Induced Killer (CIK) Cells in Chemoresistant AML Patient-Derived Xenografts." Blood 134, Supplement_1 (2019): 2665. http://dx.doi.org/10.1182/blood-2019-130399.

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Анотація:
Background Chimeric Antigen Receptor (CAR)-T cell therapy has been successfully clinically deployed in the context of B-cell malignancies, paving the way for further development also in Acute Myeloid Leukemia (AML), a still unmet clinical need in the field of oncohematology. Among the potential AML targetable antigens, CD33 is so far one of the main validated molecule. Objectives The aim of the present study was to optimize a non-viral gene transfer method to engineer Cytokine-Induced Killer (CIK) cells with a CD33.CAR by using a novel version of the Sleeping Beauty (SB) transposon system, nam
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31

Mattern, Larissa, Katrin Otten, Csaba Miskey, et al. "Molecular and Functional Characterization of BDNF-Overexpressing Human Retinal Pigment Epithelial Cells Established by Sleeping Beauty Transposon-Mediated Gene Transfer." International Journal of Molecular Sciences 23, no. 21 (2022): 12982. http://dx.doi.org/10.3390/ijms232112982.

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More and more patients suffer from multifactorial neurodegenerative diseases, such as age-related macular degeneration (AMD). However, their pathological mechanisms are still poorly understood, which complicates the development of effective therapies. To improve treatment of multifactorial diseases, cell-based gene therapy can be used to increase the expression of therapeutic factors. To date, there is no approved therapy for dry AMD, including late-stage geographic atrophy. We present a treatment option for dry AMD that transfers the brain-derived neurotrophic factor (BDNF) gene into retinal
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32

Zhou, Xianzheng, Xin Huang, Johnthomas Kang, et al. "Sleeping Beauty (SB) Transposon Mediated Umbilical Cord Blood (UCB) T Cell Therapy for Refractory Acute Lymphoblastic Leukemia (ALL)." Blood 108, no. 11 (2006): 722. http://dx.doi.org/10.1182/blood.v108.11.722.722.

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Abstract UCB is a promising alternate source of hematopoietic stem cell transplantation due to a readily available graft and low risk of GVHD. However, the incidence of ALL relapse in children is relatively high (40% for high risk ALL). To test whether UCB T cells can be genetically modified as GVL effector cells, the SB transposon system was used as a delivery vehicle since we have shown that this system can mediate genomic integration and long-term reporter gene expression in 5–20% of human primary T cells without prior activation, thus reducing duration of in vitro culture and enhancing T c
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33

Kebriaei, Partow, Stefan O. Ciurea, Mary Helen Huls, et al. "Pre-Emptive Donor Lymphocyte Infusion with CD19-Directed, CAR-Modified T Cells Infused after Allogeneic Hematopoietic Cell Transplantation for Patients with Advanced CD19+ Malignancies." Blood 126, no. 23 (2015): 862. http://dx.doi.org/10.1182/blood.v126.23.862.862.

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Анотація:
Background: Allogeneic hematopoietic cell transplantation (HCT) can be curative in a subset of patients with advanced lymphoid malignancies but relapse remains a major reason for treatment failure. Donor-derived, non-specific lymphocyte infusions (DLI) can confer an immune anti-malignancy effect but can be complicated by graft-versus-host-disease (GVHD). Chimeric antigen receptor (CAR)-modified T cells directed toward CD19 have demonstrated dramatic efficacy in patients with refractory ALL and NHL. However, responses are often associated with life-threatening cytokine release syndrome. Aim: We
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34

Petkov, S. G., W. A. Kues, and H. Niemann. "337 PROMOTER-DEPENDENT SILENCING OF REPROGRAMMING TRANSCRIPTION FACTORS IN MOUSE INDUCED PLURIPOTENT STEM CELLS PRODUCED WITH SLEEPING BEAUTY TRANSPOSON VECTORS." Reproduction, Fertility and Development 27, no. 1 (2015): 257. http://dx.doi.org/10.1071/rdv27n1ab337.

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Epigenetic silencing of the transgenes has been considered a prerequisite for complete reprogramming of mouse somatic cells to induced pluripotent stem cells (miPSC). Here, we examined the activity status of the reprogramming transcription factors in miPSC produced with Sleeping Beauty (SB) transposon vectors carrying expression cassettes with the porcine OCT4, SOX2, c-MYC, and KLF4 (pOSMK) under the control of doxycycline (DOX)-inducible (TetO) or constitutive (CAG) promoters. Mouse embryo fibroblasts (MEF) were electroporated with SB-TetO-rTA-SV40pA-TetO-pOSMK-IRES-tdTomato-bGHpA (TetO group
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35

Wang, Saisai, Yali Wang, Dan Shen, et al. "Efficient Gene Transfer into Chicken Gonads by Combining Transposons with Polyethylenimine." Journal of Agricultural Science 8, no. 10 (2016): 63. http://dx.doi.org/10.5539/jas.v8n10p63.

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<p>Transposon mediated transfection is a promising, safe, and convenient way to generate transgenic chicken compared with virus-mediated technology and the in vitro modification of primordial germ cells (PGCs). To establish a simple method for in vivo transfection of chicken PGCs, we applied four different transposon systems (PB, SB, Tol2, and ZB) to investigate the gene transfer efficiency of chicken gonads via direct injection of a mixture of transposon and transposase plasmids and transfection reagent (polyethylenimine, PEI) into the subgerminal cavity of Hamburger and Hamilton stage
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36

Masihi, Meher Beigi, Catherine Lee, Grace A. Furnari, Alexandra Garancher, and Robert J. Wechsler-Reya. "MBRS-12. A TRANSPOSON MUTAGENESIS SCREEN IDENTIFIES Rreb1 AS A DRIVER FOR GROUP 3 MEDULLOBLASTOMA." Neuro-Oncology 22, Supplement_3 (2020): iii400. http://dx.doi.org/10.1093/neuonc/noaa222.529.

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Abstract Medulloblastoma (MB) is the most common malignant childhood brain tumor. MB can be divided into four major subgroups – WNT, Sonic hedgehog (SHH), Group 3 (G3), and Group 4 (G4) – that exhibit distinct genetic alterations, gene expression profiles, and clinical outcomes. Patients with G3-MB have the worst prognosis, and a deeper understanding of this disease is critical for development of new therapies. Most G3-MBs express high levels of the MYC oncogene, suggesting that MYC plays an important role in tumorigenesis. To identify genes that cooperate with MYC to promote formation of G3-M
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37

Garrels, W., S. Holler, C. Struckmann, et al. "328 ANALYSIS OF FLUOROPHORE-EXPRESSING SPERMATOZOA FROM TRANSGENIC BOARS PRODUCED BY SLEEPING BEAUTY TRANSPOSITION." Reproduction, Fertility and Development 23, no. 1 (2011): 260. http://dx.doi.org/10.1071/rdv23n1ab328.

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The pig is an important model for biomedical research. Recently, we described a method for producing transgenic pigs using a nonautonomous Sleeping Beauty (SB) transposon1 (Garrels et al. 2010 Reprod. Domest. Anim. 45, 65 abst.). Briefly, in vivo developed porcine zygotes were co-injected with a CAGGS-Venus transposon and hyperactive SB100. A total of 141 in vivo developed zygotes were injected and transferred to synchronized foster sows. Subsequent analysis revealed specific transposase-mediated integration of 1 to 5 copies of the Venus transposon in fetuses and piglets. This method results i
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38

Lock, Dominik, Razieh Monjezi, Caroline Brandes, et al. "Automated, scaled, transposon-based production of CAR T cells." Journal for ImmunoTherapy of Cancer 10, no. 9 (2022): e005189. http://dx.doi.org/10.1136/jitc-2022-005189.

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BackgroundThere is an increasing demand for chimeric antigen receptor (CAR) T cell products from patients and care givers. Here, we established an automated manufacturing process for CAR T cells on the CliniMACS Prodigy platform that is scaled to provide therapeutic doses and achieves gene-transfer with virus-free Sleeping Beauty (SB) transposition.MethodsWe used an advanced CliniMACS Prodigy that is connected to an electroporator unit and performed a series of small-scale development and large-scale confirmation runs with primary human T cells. Transposition was accomplished with minicircle (
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39

Beigi Masihi, Meher, Catherine Lee, Alexandra Garancher, Grace Furnari, and Robert Wechsler-Reya. "TMOD-30. IDENTIFYING NEW DRIVERS OF GROUP 3 MEDULLOBLASTOMA." Neuro-Oncology 22, Supplement_2 (2020): ii234. http://dx.doi.org/10.1093/neuonc/noaa215.980.

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Анотація:
Abstract Medulloblastoma (MB) is the most common malignant childhood brain tumor. MB can be divided into four major subgroups – WNT, Sonic hedgehog (SHH), Group 3 (G3-MB), and Group 4 (G4-MB) – that exhibit distinct genetic alterations, gene expression profiles, and clinical outcomes. Patients with G3-MB have the worst prognosis, and a deeper understanding of this form of the disease is critical for development of new therapies. Most G3-MBs express high levels of the MYC oncogene, suggesting that MYC plays an important role in tumorigenesis. However, MYC overexpression is not sufficient to dri
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40

Gaipa, Giuseppe, Chiara Francesca Magnani, Daniela Belotti, et al. "Clinical-Grade Transduction of Allogeneic Cytokine Induced Killer (CIK) Cells with CD19 Chimeric Antigen Receptor (CAR) Using Sleeping Beauty (SB) Transposon: Successful GMP-Compliant Manufacturing for Clinical Applications." Blood 132, Supplement 1 (2018): 196. http://dx.doi.org/10.1182/blood-2018-196.

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Анотація:
Abstract Background: Acute lymphoblastic leukemia (ALL) is a malignant disorder with a long-term remission of less than 50% of adult patients and of nearly 80% of children. Relapsed and refractory (r/r) adult and childhood B-ALL patients, have significant unmet medical needs. Adoptive transfer of patient-derived T cells engineered to express a chimeric antigen receptor (CAR) by viral vectors has achieved complete remission and durable response in highly refractory populations (June CH et al. Science 2018). In addition, unmodified Cytokine Induced Killer (CIK) cells (CD3+, CD56+ T cells) have c
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41

Zong, Shan, Laurence J. N. Cooper, George T. McNamara, and Hiroki Torikai. "Personalization of T-Cell Therapy Using a High-Throughput Platform to Identify Tumor-Specific T-Cell Receptors." Blood 128, no. 22 (2016): 3359. http://dx.doi.org/10.1182/blood.v128.22.3359.3359.

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Abstract Background T-cell receptors (TCRs) can be used to redirect the specificity of T-cells for human application. This has particular appeal for the targeting of neoantigens. However, efficient identification, cloning, and characterization of antigen (Ag)-specific TCRs is needed to enable the timely adoptive transfer of T-cells genetically modified to express therapeutic TCRs. We have harnessed next generation sequencing (NGS) to identify desirable TCRs. This approach enables us to simultaneously identify hundreds of Ag-specific TCRs, along with the expression of genes to characterize func
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42

Hauschild-Quintern, J., B. Petersen, D. Herrmann, et al. "327 PRODUCTION OF TRIPLE TRANSGENIC hHO-1/GGTA-1–/–/hCD55 TRANSGENIC PIGS USING SLEEPING BEAUTY TRANSPOSITION AND ZINC-FINGER NUCLEASES." Reproduction, Fertility and Development 25, no. 1 (2013): 311. http://dx.doi.org/10.1071/rdv25n1ab327.

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Анотація:
Advances in xenotransplantation (pig-to-baboon or human transplantation) require multi-transgenic pigs with a homozygous knockout (KO) of the α1,3-galactosyltransferase gene (GGTA-1, encoding for Gal-epitopes) to control the hyperacute rejection response. To achieve prolonged survival of the porcine xenograft, transgenic expression of additional immune modulatory genes on the GGTA-1–/– background is considered the solution of choice. The acute vascular rejection (AVR) is primarily caused by endothelial cell activation and leads to rejection of GGTA-1–/– pig organs. Here, we set out to produce
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43

Magnani, Chiara F., Renier Myburgh, Norman F. Russkamp, et al. "Anti-CD117 CAR T Cells Incorporating a Safety Switch Eradicate Acute Myeloid Leukemia and Deplete Human Hematopoietic Stem Cells." Blood 138, Supplement 1 (2021): 2808. http://dx.doi.org/10.1182/blood-2021-145195.

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Abstract Introduction Acute Myeloid Leukemia (AML) arises from the accumulation of mutations within the hematopoietic stem and progenitor cells (HSPC), leading to the emergence of a population of malignant leukemia-initiating cells (LIC). AML-LICs maintain high phenotypic similarity with their cells-of-origin and can cause post-treatment relapse. Immunotherapy with chimeric antigen receptor (CAR) T cells is an innovative approach to tackle cancer via surface-expressed cancer-associated antigens. We recently proposed the use of CAR T cells specific for the CD117 antigen to deplete LIC and repla
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44

Tolar, Jakub, In-Hyun Park, Lily Xia, et al. "Patient-Specific Induced Pluripotent Stem Cells in Hurler Syndrome." Blood 112, no. 11 (2008): 386. http://dx.doi.org/10.1182/blood.v112.11.386.386.

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Abstract Hurler syndrome (HS; mucopolysaccharidosis type I) is caused by severe mutations in the iduronidase (IDUA) gene, leading to multi-organ system dysfunction due to the toxic accumulation of glycosaminoglycans. Although allogeneic hematopoietic cell transplantation (HCT) has been shown to provide the IDUA protein and to reverse many of the manifestations of HS, allogeneic HCT is associated with significant morbidity and mortality. We hypothesized that an advantageous alternative strategy may be to induce gene-corrected autologous pluripotent cells to become hematopoietic stem cells, whic
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45

Monga, Satdarshan, Sungjin Ko, Laura Molina, Junyan Tao, Aatur D. Singhi, and Aaron Bell. "Hepatocyte-derived intrahepatic cholangiocarcinoma requires Yap and Sox9: A clinical and preclinical analysis." Journal of Clinical Oncology 38, no. 4_suppl (2020): 582. http://dx.doi.org/10.1200/jco.2020.38.4_suppl.582.

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582 Background: Intrahepatic cholangiocarcinoma (ICC) is a liver tumor of increasing incidence and devastating prognosis. WGS and WES have identified numerous molecular pathways and fusions in ICC. Recent studies have also suggested hepatocyte as a cell source in a subset of ICCs, especially those associated with chronic liver insult such as non-alcoholic steatohepatitis (NASH) or primary sclerosing cholangitis (PSC). Methods: Since co-expression of myristoylated AKT (myrAKT) & Notch intracellular domain (NICD) in hepatocytes using sleeping beauty transposon/transposase-based hydrodynamic
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46

Patel, Krina, Simon Olivares, Harjeet Singh, et al. "Combination Immunotherapy with NY-ESO-1-Specific CAR+ T Cells with T-Cell Vaccine Improves Anti-Myeloma Effect." Blood 128, no. 22 (2016): 3366. http://dx.doi.org/10.1182/blood.v128.22.3366.3366.

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Анотація:
Abstract Adoptive transfer of T cells expressing chimeric antigen receptor (CAR) has demonstrated clinical effectiveness in early phase clinical trials, with persistence of effector cells typically leading to improved outcomes. Most CARs directly dock with cell-surface antigens, but this limits the number of tumor-derived targets. Thus, we have adapted two technologies to target intracellular antigens and improve survival of infused T cells. This was accomplished by expressing a CAR on T effector cells that functions as a mimetic of T-cell receptor (TCR) to recognize NY-ESO-1 in the context of
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47

Tolar, Jakub, Scott Bell, Ron McElmurry, et al. "Real-Time In Vivo Biodistribution of Multipotent Adult Progenitor Cells (MAPC): Role of the Immune System in MAPC Resistance in Non-Transplanted and Bone Marrow Transplanted Mice." Blood 104, no. 11 (2004): 507. http://dx.doi.org/10.1182/blood.v104.11.507.507.

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Анотація:
Abstract MAPC are non-hematopoietic stem cells derived from adult BM with the potential for a wide differentiation pattern in vitro and in vivo. MAPCs are MHC class I and thus may be a target of natural killer (NK) cell mediated elimination in the syngeneic setting. To determine whether MAPC are susceptible targets for NK mediated killing, splenocytes from poly I:C (an inducer of NK activity) treated C57BL/6 mice were mixed with Yac-1 (H2a; a NK sensitive target) or MAPC (from C57BL/6J-rosa26) in a chromium release assay. Effector:target ratios indicated that MAPC were susceptible to NK lysis
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48

Zhou, Yiting, Guangwei Ma, Jiawen Yang, Zenghong Gao, and Yabin Guo. "The Integration Preference of Sleeping Beauty at Non-TA Site Is Related to the Transposon End Sequences." Frontiers in Genetics 12 (March 10, 2021). http://dx.doi.org/10.3389/fgene.2021.639125.

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Анотація:
Recently, we proved that Sleeping Beauty (SB) transposon integrates into non-TA sites at a lower frequency. Here, we performed a further study on the non-TA integration of SB and showed that (1) SB can integrate into non-TA sites in HEK293T cells as well as in mouse cell lines; (2) Both the hyperactive transposase SB100X and the traditional SB11 catalyze integrations at non-TA sites; (3) The consensus sequence of the non-TA target sites only occurs at the opposite side of the sequenced junction between the transposon end and the genomic sequences, indicating that the integrations at non-TA sit
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49

Ramos, Aline Lisie, Fernanda Soares Niemann, Adriana Silva Santos Duarte, et al. "Comparison of different methods to overexpress large genes." Journal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale 91, no. 2 (2018). http://dx.doi.org/10.4081/jbr.2018.7249.

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Анотація:
Gain-of-function of very large transgene constructs can lead to genetic perturbations, providing researchers with the alternative of a powerful tool to identify pathway components which remain undetected when using traditional loss-of-function analysis. To promote longer-term expression, various systems for transgene integration have been developed, however large cDNA sequences are often difficult to clone into size-limited expression vectors. We attempted to overexpress ARHGAP21, a 5.874 kb gene, using different methodologies as plasmid, lentiviral and Sleeping Beauty (SB) transposon based ge
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50

Prommersberger, Sabrina, Michael Reiser, Julia Beckmann, et al. "CARAMBA: a first-in-human clinical trial with SLAMF7 CAR-T cells prepared by virus-free Sleeping Beauty gene transfer to treat multiple myeloma." Gene Therapy, April 13, 2021. http://dx.doi.org/10.1038/s41434-021-00254-w.

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Анотація:
AbstractClinical development of chimeric antigen receptor (CAR)-T-cell therapy has been enabled by advances in synthetic biology, genetic engineering, clinical-grade manufacturing, and complex logistics to distribute the drug product to treatment sites. A key ambition of the CARAMBA project is to provide clinical proof-of-concept for virus-free CAR gene transfer using advanced Sleeping Beauty (SB) transposon technology. SB transposition in CAR-T engineering is attractive due to the high rate of stable CAR gene transfer enabled by optimized hyperactive SB100X transposase and transposon combinat
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