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Journal articles on the topic "SLC22A23"

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Engelhart, Darcy C., Jeffry C. Granados, Da Shi, Milton H. Saier Jr., Michael E. Baker, Ruben Abagyan, and Sanjay K. Nigam. "Systems Biology Analysis Reveals Eight SLC22 Transporter Subgroups, Including OATs, OCTs, and OCTNs." International Journal of Molecular Sciences 21, no. 5 (March 5, 2020): 1791. http://dx.doi.org/10.3390/ijms21051791.

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The SLC22 family of OATs, OCTs, and OCTNs is emerging as a central hub of endogenous physiology. Despite often being referred to as “drug” transporters, they facilitate the movement of metabolites and key signaling molecules. An in-depth reanalysis supports a reassignment of these proteins into eight functional subgroups, with four new subgroups arising from the previously defined OAT subclade: OATS1 (SLC22A6, SLC22A8, and SLC22A20), OATS2 (SLC22A7), OATS3 (SLC22A11, SLC22A12, and Slc22a22), and OATS4 (SLC22A9, SLC22A10, SLC22A24, and SLC22A25). We propose merging the OCTN (SLC22A4, SLC22A5, and Slc22a21) and OCT-related (SLC22A15 and SLC22A16) subclades into the OCTN/OCTN-related subgroup. Using data from GWAS, in vivo models, and in vitro assays, we developed an SLC22 transporter-metabolite network and similar subgroup networks, which suggest how multiple SLC22 transporters with mono-, oligo-, and multi-specific substrate specificity interact to regulate metabolites. Subgroup associations include: OATS1 with signaling molecules, uremic toxins, and odorants, OATS2 with cyclic nucleotides, OATS3 with uric acid, OATS4 with conjugated sex hormones, particularly etiocholanolone glucuronide, OCT with neurotransmitters, and OCTN/OCTN-related with ergothioneine and carnitine derivatives. Our data suggest that the SLC22 family can work among itself, as well as with other ADME genes, to optimize levels of numerous metabolites and signaling molecules, involved in organ crosstalk and inter-organismal communication, as proposed by the remote sensing and signaling theory.
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Moss, Darren M., Neill J. Liptrott, Paul Curley, Marco Siccardi, David J. Back, and Andrew Owen. "Rilpivirine Inhibits Drug Transporters ABCB1, SLC22A1, and SLC22A2In Vitro." Antimicrobial Agents and Chemotherapy 57, no. 11 (September 3, 2013): 5612–18. http://dx.doi.org/10.1128/aac.01421-13.

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ABSTRACTRilpivirine is a nonnucleoside reverse transcriptase inhibitor approved for treatment of HIV-1 infection in antiretroviral-naive adult patients. Potential interactions with drug transporters have not been fully investigated. Transport by and inhibition of drug transporters by rilpivirine were analyzed to further understand the mechanisms governing rilpivirine exposure and determine the potential for transporter-mediated drug-drug interactions. The ability of rilpivirine to inhibit or be transported by ABCB1 was determined using ABCB1-overexpressing CEMVBL100cells and Caco-2 cell monolayers. TheXenopus laevisoocyte heterologous protein expression system was used to clarify if rilpivirine was either transported by or inhibited the function of influx transporters SLCO1A2, SLCO1B1, SLCO1B3, SLC22A2, SLC22A6, and SLC22A8. The ability of rilpivirine to inhibit or be transported by SLC22A1 was determined using SLC22A1-expressing KCL22 cells. Rilpivirine showed higher accumulation in SLC22A1-overexpressing KCL22 cells than control cells (27% increase,P= 0.03) and inhibited the functionality of SLC22A1 and SLC22A2 transport with 50% inhibitory concentrations (IC50s) of 28.5 μM and 5.13 μM, respectively. Inhibition of ABCB1-mediated digoxin transport was determined for rilpivirine, which inhibited digoxin transport in the B-to-A direction with an IC50of 4.48 μM. The maximum rilpivirine concentration in plasma in patients following a standard 25-mg dosing regimen is around 0.43 μM, lower than that necessary to substantially inhibit ABCB1, SLC22A1, or SLC22A2in vitro. However, these data indicate that SLC22A1 may contribute to variability in rilpivirine exposure and that interactions of rilpivirine with substrates of SLC22A1, SLC22A2, or ABCB1 may be possible.
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Kang, Weiting, Meng Zhang, Qiang Wang, Da Gu, Zhilong Huang, Hanbo Wang, Yuzhu Xiang, Qinghua Xia, Zilian Cui, and Xunbo Jin. "The SLC Family Are Candidate Diagnostic and Prognostic Biomarkers in Clear Cell Renal Cell Carcinoma." BioMed Research International 2020 (May 2, 2020): 1–17. http://dx.doi.org/10.1155/2020/1932948.

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Clear cell renal cell carcinoma (ccRCC) is the most common lethal subtype of renal cancer, and changes in tumor metabolism play a key role in its development. Solute carriers (SLCs) are important in the transport of small molecules in humans, and defects in SLC transporters can lead to serious diseases. The expression patterns and prognostic values of SLC family transporters in the development of ccRCC are still unclear. The current study analyzed the expression levels of SLC family members and their correlation with prognosis in ccRCC patients with data from Oncomine, Gene Expression Profiling Interactive Analysis (GEPIA), The Cancer Genome Atlas (TCGA), cBioPortal, the Human Protein Atlas (HPA), the International Cancer Genome Consortium (ICGC), and the Gene Expression Omnibus (GEO). We found that the mRNA expression levels of SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were significantly lower in ccRCC tissues than in normal tissues and the protein expression levels of SLC22A6, SLC22A7, SLC22A13, and SLC34A1 were also significantly lower. Except for SLC22A7, the expression levels of SLC22A6, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were correlated with the clinical stage of ccRCC patients. The lower the expression levels of SLC22A6, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were, the later the clinical stage of ccRCC patients was. Further experiments revealed that the expression levels of SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were significantly associated with overall survival (OS) and disease-free survival (DFS) in ccRCC patients. High SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 expression predicted improved OS and DFS. Finally, GSE53757 and ICGC were used to revalidate the differential expression and clinical prognostic value. This study suggests that SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 may be potential targets for the clinical diagnosis, prognosis, and treatment of ccRCC patients.
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Lapczuk-Romanska, Joanna, Diana Busch, Ewa Gieruszczak, Agnieszka Drozdzik, Katarzyna Piotrowska, Robert Kowalczyk, Stefan Oswald, and Marek Drozdzik. "Membrane Transporters in Human Parotid Gland-Targeted Proteomics Approach." International Journal of Molecular Sciences 20, no. 19 (September 28, 2019): 4825. http://dx.doi.org/10.3390/ijms20194825.

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Salivary glands provide secretory functions, including secretion of xenobiotics and among them drugs. However, there is no published information about protein abundance of drug transporters measured using reliable protein quantification methods. Therefore, mRNA expression and absolute protein content of clinically relevant ABC (n = 6) and SLC (n = 15) family member transporters in the human parotid gland, using the qRT-PCR and liquid chromatography‒tandem mass spectrometry (LC−MS/MS) method, were studied. The abundance of nearly all measured proteins ranged between 0.04 and 0.45 pmol/mg (OCT3 > MRP1 > PEPT2 > MRP4 > MATE1 > BCRP). mRNAs of ABCB1, ABCC2, ABCC3, SLC10A1, SLC10A2, SLC22A1, SLC22A5, SLC22A6, SLC22A7, SLC22A8, SLCO1A2, SLCO1B1, SLCO1B3 and SLCO2B1 were not detected. The present study provides, for the first time, information about the protein abundance of membrane transporters in the human parotid gland, which could further be used to define salivary bidirectional transport (absorption and secretion) mechanisms of endogenous compounds and xenobiotics.
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Bennett, Katie M., Jun Liu, Courtney Hoelting, and James Stoll. "Expression and analysis of two novel rat organic cation transporter homologs, SLC22A17 and SLC22A23." Molecular and Cellular Biochemistry 352, no. 1-2 (February 27, 2011): 143–54. http://dx.doi.org/10.1007/s11010-011-0748-y.

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AL-Eitan, Laith, Basima Almomani, Ahmad Nassar, Barakat Elsaqa, and Nesreen Saadeh. "Metformin Pharmacogenetics: Effects of SLC22A1, SLC22A2, and SLC22A3 Polymorphisms on Glycemic Control and HbA1c Levels." Journal of Personalized Medicine 9, no. 1 (March 25, 2019): 17. http://dx.doi.org/10.3390/jpm9010017.

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Type 2 diabetes mellitus (T2DM) constitutes a major portion of Jordan’s disease burden, and incidence rates are rising at a rapid rate. Due to variability in the drug’s response between ethnic groups, it is imperative that the pharmacogenetics of metformin be investigated in the Jordanian population. The objective of this study was to investigate the relationship between twenty-one single nucleotide polymorphisms (SNPs) in the SLC22A1, SLC22A2, and SLC22A3 genes and their effects on metformin pharmacogenetics in Jordanian patients diagnosed with type 2 diabetes mellitus. Blood samples were collected from 212 Jordanian diabetics who fulfilled the inclusion criteria, which were then used in SNP genotyping and determination of HbA1c levels. The rs12194182 SNP in the SLC22A3 gene was found to have a significant association (p < 0.05) with lower mean HbA1c levels, and this association more pronounced in patients with the CC genotype (i.e., p-value was significant before correcting for multiple testing). Moreover, the multinomial logistic regression analysis showed that SNP genotypes within the SLC22A1, SLC22A2, and SLC22A3 genes, body mass index (BMI) and age of diagnosis were significantly associated with glycemic control (p < 0.05). The results of this study can be used to predict response to metformin and other classes of T2DM drugs, making treatment more individualized and resulting in better clinical outcomes.
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Gottier Nwafor, Janine, Marta Nowik, Naohiko Anzai, Hitoshi Endou, and Carsten A. Wagner. "Metabolic Acidosis Alters Expression of Slc22 Transporters in Mouse Kidney." Kidney and Blood Pressure Research 45, no. 2 (2020): 263–74. http://dx.doi.org/10.1159/000506052.

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Introduction: The kidneys play a central role in eliminating metabolic waste products and drugs through transporter-mediated excretion along the proximal tubule. This task is mostly achieved through a variety of transporters from the solute carrier family 22 (SLC22) family of organic cation and anion transporters. Metabolic acidosis modulates metabolic and renal functions and also affects the clearance of metabolites and drugs from the body. We had previously shown that induction of metabolic acidosis in mice alters a large set of transcripts, among them also many transporters including transporters from the Slc22 family. Objective: Here we further investigated the impact of acidosis on Slc22 family members. Methods: Metabolic acidosis was induced for 2 or 7 days with NH4Cl, some animals also received the uricase inhibitor oxonic acid for comparison. Expression of transporters was studied by qPCR and immunoblotting. Results: NH4Cl induced no significant changes in plasma or urine uric acid levels but caused downregulation of Slc22a1 (Oct1), Slc22a6 (Oat1), Slc22a19 (Oat5), and ­Slc22a12 (Urat1) at mRNA level. In contrast, Slc22a4 mRNA (Octn1) was upregulated. On protein level, NH4Cl increased Octn1 (after 7 days) and Urat1 (after 2 days) abundance and decreased Oat1 (after 2 days) and Urat1 (after 7 days). Oxonic acid had no impact on protein abundance of any of the transporters tested. Conclusion: In summary, metabolic acidosis alters expression of several transporters involved in renal excretion of metabolic waste products and drugs. This may have implications for drug kinetics and clearance of waste metabolites.
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Cheong, Hyun Sub, Hae Deun Kim, Han Sung Na, Ji On Kim, Lyoung Hyo Kim, Seung Hee Kim, Joon Seol Bae, Myeon Woo Chung, and Hyoung Doo Shin. "Screening of genetic variations of SLC15A2, SLC22A1, SLC22A2 and SLC22A6 genes." Journal of Human Genetics 56, no. 9 (July 28, 2011): 666–70. http://dx.doi.org/10.1038/jhg.2011.77.

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Engelhart, Darcy C., Priti Azad, Suwayda Ali, Jeffry C. Granados, Gabriel G. Haddad, and Sanjay K. Nigam. "Drosophila SLC22 Orthologs Related to OATs, OCTs, and OCTNs Regulate Development and Responsiveness to Oxidative Stress." International Journal of Molecular Sciences 21, no. 6 (March 15, 2020): 2002. http://dx.doi.org/10.3390/ijms21062002.

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The SLC22 family of transporters is widely expressed, evolutionarily conserved, and plays a major role in regulating homeostasis by transporting small organic molecules such as metabolites, signaling molecules, and antioxidants. Analysis of transporters in fruit flies provides a simple yet orthologous platform to study the endogenous function of drug transporters in vivo. Evolutionary analysis of Drosophila melanogaster putative SLC22 orthologs reveals that, while many of the 25 SLC22 fruit fly orthologs do not fall within previously established SLC22 subclades, at least four members appear orthologous to mammalian SLC22 members (SLC22A16:CG6356, SLC22A15:CG7458, CG7442 and SLC22A18:CG3168). We functionally evaluated the role of SLC22 transporters in Drosophila melanogaster by knocking down 14 of these genes. Three putative SLC22 ortholog knockdowns—CG3168, CG6356, and CG7442/SLC22A—did not undergo eclosion and were lethal at the pupa stage, indicating the developmental importance of these genes. Additionally, knocking down four SLC22 members increased resistance to oxidative stress via paraquat testing (CG4630: p < 0.05, CG6006: p < 0.05, CG6126: p < 0.01 and CG16727: p < 0.05). Consistent with recent evidence that SLC22 is central to a Remote Sensing and Signaling Network (RSSN) involved in signaling and metabolism, these phenotypes support a key role for SLC22 in handling reactive oxygen species.
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Tamai, Ikumi. "Pharmacological and pathophysiological roles of carnitine/organic cation transporters (OCTNs: SLC22A4, SLC22A5 and Slc22a21)." Biopharmaceutics & Drug Disposition 34, no. 1 (October 14, 2012): 29–44. http://dx.doi.org/10.1002/bdd.1816.

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Dissertations / Theses on the topic "SLC22A23"

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Farthing, Christine. "Modulation Of CNS Neurotransmitter Levels And Associated Behaviors In Organic Anion Transporter 1 (Slc22a6) And Organic Anion Transporter 3 (Slc22a8) Knockout Mice." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3562.

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According to the World Health Organization, mental disorders represent the leading cause of disability in the US generating ~58 billion dollars in medical costs annually. Additionally, among the US population, ~40 million adults suffer from an anxiety disorder and ~14 million suffer from a major depressive disorder. The association between the persistence of these neurobehavioral conditions and central nervous system (CNS) levels of biogenic amines and metabolites has been studied for half a century. Further, a number of drugs interfering with neurotransmission/metabolism are used clinically for treatment of these disorders. Recently, some members of the solute carrier (SLC) superfamily, the SLC22 transporter family, which includes organic anion transporters (Oat1, Oat3), were found to be expressed and functional on the apical membrane of the choroid plexus, a component of the blood-cerebrospinal fluid barrier. The cells of this epithelia form tight junctions, which slows penetration of solutes into the brain and limits passive efflux of endogenous solutes from the brain. Therefore, Oat1 and Oat3 are poised to play an active role in the removal of NTs and metabolites from the CSF. Thus, a better understanding of the underlying roles of OATs in regulating CNS neurotransmitters and connecting their activity to complex behaviors may result in improved understanding of the processes governing CNS homeostasis. Basal locomotor, anxiety-like and depressive-like behaviors in mice of three genotypes (WT, Oat1-/-, and Oat3-/-) across ages (3-18 mo.) were evaluated using behavioral paradigms (e.g. open field activity (OFA), light-dark (LD), marble burying (MB), and tail suspension test (TST)). Secondly, a simple high performance liquid chromatography-ultraviolet/electrochemical detection (HPLC-UV/ECD) method was developed for quantitation of monoamines and metabolites in mouse whole brain. Following completion of behavioral assessments, whole brain concentrations of monoamines and metabolites were determined using the developed method. Lastly, a novel gas chromatography tandem mass spectrometry (GC-MS/MS) method was developed for quantitation of amino acid neurotransmitters, L-glutamic acid (GA) and γ-aminobutyric acid (GABA), in mouse whole brain. The developed method was used for measurement of whole brain concentrations of GA and GABA in a small subset of WT, Oat1-/-, and Oat3-/- mice at 3 and 18 mo.
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Lai, Raymond E. "Elucidation of Substrate Binding Interactions for Human Organic Cation Transporters 1 (SLC22A1) and 2 (SLC22A2) Using In Silico Homology Modeling in Conjunction with In Vitro Site-Directed Mutagenesis and Kinetic Analysis." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5593.

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The organic cation transporters (OCTs) play a critical role in the absorption, distribution and elimination of many drugs, hormones, herbal medicines, and environmental toxins. Given the broad substrate specificity of OCTs, they fall victim to the high susceptibility for contributing to harmful drug-drug interactions. Further defining how human (h)OCTs mechanistically bind to its broad array of substrates will provide significant insight to the understanding and prediction of drug-drug interactions in polypharmacy patients and the advancement of future rational drug design for therapeutics targeting OCTs. The goal of the current study was to elucidate the critical amino acid residues for transporter-substrate binding interactions on human (h)OCT1 and 2 utilizing in silico molecular modeling techniques (homology modeling and automated docking), as well as in vitro mutagenesis and kinetic transport experiments. Three-dimensional homology models were generated for hOCT1 and 2 using Piriformospora indica phosphate transporter (PiPT) serving as template. A putative binding pocket was identified and used to dock the prototypical substrate MPP+. Docking studies revealed five residues for each transporter (hOCT1 and hOCT2) that may be critical for substrate-transporter interactions. The in silico data was used to guide subsequent in vitro site-directed mutagenesis and kinetic analysis. Four hOCT1 mutants (Gln241Lys, Thr245Lys, Tyr361Ala, and Glu447Lys) and three hOCT2 mutants (Gln242Lys, Tyr362Phe, and Tyr362Ala) showed complete loss of MPP+ transporter activity. Decreased affinity for MPP+ was observed for Phe244Ser and Thr245Ser in hOCT1, and Tyr245Ala in hOCT2. All amino acid residues highlighted in the in vitro experiments may be potentially critical for substrate-transporter interactions particularly Tyr361, Phe244 and Thr245 in hOCT1; and Tyr362 and Tyr245 in hOCT2. Docking of known structurally divergent hOCT1 and hOCT2 substrates revealed similar binding interactions as that identified for MPP+, albeit with some unique residues, suggesting the presence of a large central cavity within both transporters. Through the combination of in silico and in vitro experiments, a putative binding pocket was defined and several residues important for substrate-transporter interaction were identified and verified for hOCT1 and hOCT2. Further defining how OCTs biochemically interact with their broad array of substrates will provide significant insight to the understanding and prediction of drug-drug interactions in polypharmacy patients and the advancement of future rational drug design for therapeutics targeting OCT1 and OCT2.
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Cortez, Pacheco Renzo Manuel. "Caracterización del exón 4 del gen SLC22A2 (OCT2) en poblaciones peruanas." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2020. https://hdl.handle.net/20.500.12672/11555.

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Actualmente la diabetes mellitus tipo 2 es un problema de salud pública mundial, debido a factores como el estilo de vida de la población, con tendencia al sedentarismo y consumo de comidas procesadas, lo que contribuye a su actual incremento. El tratamiento de primera línea es la administración de metformina, un fármaco antihiperglucémico cuya farmacodinámica depende de transportadores como los OCTs, tanto para su ingreso a las células como para su excreción vía urinaria. La gran variabilidad interindividual de la concentración plasmática de metformina indica una variación en la tasa de excreción del fármaco, reportado por distintos autores en otras poblaciones, la cual es causada por variaciones en genes encargados de su excreción, como el gen SLC22A2, codificante del trasportador catiónico OCT2. En el presente estudio se estandarizó una técnica para la unión de productos de PCR diferentes, haciendo uso de la técnica OE-PCR, con la cual se unieron los exones 2, 3 y 4 del gen SLC22A2. Se caracterizó el exón 4 del gen SLC22A2 en peruanos nativos y mestizos, detectándose en un 6.25% de individuos el polimorfismo 808C>A en heterocigosis (uno de la población nativa y dos de la mestiza), el 93.75% de individuos restantes presentaron el genotipo 808AA, estos resultados concuerdan con los que se encuentran en la base de datos 1000 genomas. Esta variante tiene una gran implicancia farmacológica y ha sido reportada en diversos estudios como causante de un menor aclaramiento del fármaco, conllevando a un aumento de su concentración plasmática, pudiendo ocasionar efectos adversos en pacientes. Este estudio sirve como base para análisis más amplios de este y otros genes en la población peruana con implicancia farmacológica para enfermedades como la diabetes tipo 2.
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Frederickx, Nancy. "The SLC22A18 transporter, a potential biomarker for chemotherapeutic treatment." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/217862.

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SUMMARYThe diversity of cancer molecular origins associated with the genetic variability of patients has encouraged the development of chemotherapeutic treatments adapted not only to the target tumor, but also to a specific patient. This personalized strategy is based on cancer biomarkers allowing a better identification and characterization of each tumor where predictive biomarkers provide the distinction between various factors indicative of the response to the treatment. In this context, several studies highlighted the role of the solute carrier transporter family 22 (solute carriers 22 or SLC22) in the uptake of platinum anticancer drugs. This mechanism being not well understood, our work intends to establish the potential role of SLC22 member A18 (SLC22A18) as predictive biomarker in the aim to help to a better targeted chemotherapeutic strategy for each patient. We optimized a system overexpressing SLC22A18 stably or transiently in HeLa cancer cell line. SLC22A18 expression was confirmed by qRT-PCR, western blotting, microscopy and flow cytometry. The cell lines were treated with taxane, anthracyclin, vinca alkaloid and nitrosoureas anticancer drug families. We showed that doxorubicin, camptothecin, chloroquine, tetracycline and carmustin had no effect on the cell viability assays suggesting that they are not substrates of SLC22A18. Interestingly, the cell line was sensitized in the presence of antimitotic drug with a sensitivity factor of 2.7 in the presence of paclitaxel, 1.4 with docetaxel, 1.8 with vinblastin and 2.2 in the presence of vincristine. To confirm these results, we elaborated a SLC22A18 knockdown cell line in HS683 cells using siRNA technology. The downexpression of SLC22A18 was correlated to a tendency to resist to the accumulation of paclitaxel thereby confirming the previous results. Simultaneously, a knockout cell line was established using the transcription activator-like effectors nuclease (TALEN) technology in U373 cell line. Our studies constitute a robust base of knowledge for further investigation on SLC22A18 transporter as a predictive biomarker promoting antimitotic treatment in tumors where this transporter is detected.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
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Schulz, Christian [Verfasser], and Dirk [Akademischer Betreuer] Gründemann. "SLC22A13 katalysiert den unidirektionalen Efflux von Aspartat und Glutamat / Christian Schulz. Gutachter: Dirk Gründemann." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2015. http://d-nb.info/1069199524/34.

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Anderson, Jason T. PharmD. "Role of OCTN1 (SLC22A4) in the Disposition of Nucleoside Analogs in AML." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1573744863552166.

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HAMAJIMA, NOBUYUKI, MARIKO NAITO, EMI MORITA, YOSHINORI ITO, KOJI SUZUKI, RIEKO OKADA, and SAYAKA KURIKI. "SLC22A12 W258X FREQUENCY ACCORDING TO SERUM URIC ACID LEVEL AMONG JAPANESE HEALTH CHECKUP EXAMINEES." Nagoya University School of Medicine, 2011. http://hdl.handle.net/2237/14914.

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Vivona, Douglas. "Estudo da expressão dos genes ABCB1 e SLC22A1 e sua relação com marcadores de resposta ao mesilato de imatinibe em pacientes com leucemia mieloide crônica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/9/9136/tde-18032014-131945/.

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A leucemia mieloide crônica (LMC) é uma expansão clonal da célula tronco hematopoética, traduzindo-se por hiperplasia mieloide, leucocitose, neutrofilia, basofilia e esplenomegalia. O cromossomo Filadélfia é característico da doença, sendo produto da translocação t(9:22)(q34;q11), resultando na fusão dos genes ABL e BCR. Esta fusão gera um gene híbrido que codifica uma proteína com elevada atividade tirosinoquinase e tem um papel central na patogenia da LMC. O mesilato de imatinibe (MI) é um derivado da fenilaminopirimidina que inibe a proteína tirosinoquinase BCR-ABL1 in vitro e in vivo. O MI interage com transportadores de membrana de influxo, como o organic carion solute carrier 22 ,member 1 (SLC22A1,hOCT1); e de efluxo, como ATP binding cassette B1 (ABCB1, MDR1, P-gp). Os polimorfismos ABCB1 c.1236C>T, C.3435C>T e c.2677G>T/A têm sido associados com a alteração da função da P-gp. Este estudo teve por objetivo investigar a relação da expressão do RNAm de ABCB1 e SLC22A1 com marcadores de resposta ao tratamento com MI e avaliar a atividade funcional da P-gp em células mononucleares de pacientes com diferentes haplótipos para os polimorfismos ABCB1 c.1236C>T, c.3435C>T e c.2677G>T/A. Foram incluídos 118 pacientes com LMC para o estudo da expressão do RNAm de SLC22A1 e ABCB1 e para o estudo da atividade da P-gp foram selecionados 28 pacientes de acordo com os haplótipos dos polimorfismos ABCB1 c.1236C>T, c.3435C>T e c.2677G>T/A. Para o estudo da expressão do RNAm de SLC22A1 e ABCB1 foram constituídos dois grupos: Grupo 1 com 70 pacientes com resposta citogenética completa com a dose padrão de MI (400 mg/dia de MI) em até 18 meses e, Grupo 2 com 48 pacientes sem resposta citogenética completa com a dose inicial de 400 mg/dia de MI ou que perderam esta resposta ao longo do tratamento. Para o estudo da atividade funcional da P-gp, dos 118 pacientes incluídos, foram selecionados 10 pacientes que apresentaram o haplótipo 1236CC/3435CC/2677GG, 10 pacientes que apresentaram o haplótipo 1236CT/3435CT/2677GT e 8 pacientes que apresentaram o haplótipo 1236TT/3435TT/2677TT. A resposta ao tratamento foi avaliada segundo os critérios da European LeukemiaNet. Amostras de sangue foram obtidas para: quantificação de BCR-ABL1, extração do RNAm total, análise citogenética de banda G, dosagem da concentração plasmática de MI e análise da atividade e expressão da P-gp. A análise da expressão dos genes ABCB1 e SLC22A1 foi feita por PCR em tempo real, a análise da atividade e expressão da P-gp foram feitas por citometria de fluxo e a dosagem da concentração plasmática de MI foi realizada por eletroforese capilar. Resultados: A expressão de ABCB1 e SLC22A1 foi analisada nos 118 pacientes incluídos e foi similar entre os grupos de resposta. A elevada expressão do gene SLC22A1 foi associada àqueles pacientes que alcançaram a resposta molecular maior (RMM) no grupo respondedor (P=0,009). Não houve associação entre a expressão de ABCB1 e a resposta ao MI. Nenhum dos genes foi associado à resposta molecular completa (RMC). No estudo da atividade da P-gp foi observada uma maior atividade nos pacientes que apresentavam o haplótipo 1236CC/3435CC/2677GG quando comparado àqueles que possuíam o haplótipo com alelo mutado. Não houve diferença na expressão do RNAm dos genes SLC22A1 e ABCB1, expressão da P-gp e concentração plasmástica de MI entre os grupos de haplótipos. Os pacientes que não alcançaram a RMM apresentaram uma maior taxa de efluxo mediado pela P-gp quando comparado aos indivíduos que alcançaram esta resposta (64,7% vs. 45,7%; P=0,001). Os indivíduos que alcançaram a RMM e RMC apresentaram maior mediana de expressão do gene SLC22A1. Os pacientes sem RMM apresentaram menor concentração plasmática de MI quando comparados aos que alcançaram esta resposta (0,51 µg/mL vs. 1,42 µg/mL; P=0,001). Não foi observada associação entre a concentração plasmática de MI e a RMC. Em conclusão os pacientes respondedores a dose padrão de 400mg/dia de MI e que alcançaram a RMM apresentam maior expressão de RNAm de SLC22A1 e os portadores dos haplótipos 1236CT/3435CT/2677GT e 1236TT/3435TT/2677TT exibem menor efluxo mediado pela P-gp apresentando maior frequência de RMM.
Chronic myeloid leukemia (CML) is a clonal expansion of hematopoietic stem cell, translating into myeloid hyperplasia, leukocytosis, neutrophilia, basophilia and splenomegaly. The Philadelphia chromosome is characteristic of the disease, being the product of the translocation t(9:22)( q34,q11), resulting in the fusion of the BCR and ABL genes. This fusion generates a hybrid gene that encodes a protein with elevated tyrosine kinase activity and plays a central role in the pathogenesis of CML. Imatinib mesylate (IM) is a derivative of fenilaminopirimidine that inhibits BCR-ABL1 fusion protein tyrosine kinase in vitro and in vivo. IM interacts with uptake membrane transporters, such as cation organic solute carrier 22, member 1 (SLC22A1, hOCT1) and efflux as ATP binding cassette B1 (ABCB1, MDR1,P-gp). ABCB1 polymorphisms c.1236C>T,c.3435C>T and c.2677G>T/A have been associated with altered function of P-gp. This study aimed to investigate the relationship between mRNA expression of ABCB1 and SLC22A1 with markers of response to treatment with IM and evaluate the functional activity of P-gp in mononuclear cells of patients with different haplotypes for ABCB1 c.1236C>T, c.3435C>T and c.2677G>T/A polymorphisms. This study included 118 patients with CML to study the mRNA expression of SLC22A1 and ABCB1 and to study the P-gp activity, 28 patients were selected according to the haplotypes of ABCB1 c.1236C>T, c.3435C>T and c.2677G>T/A polymorphisms. To study the mRNA expression of SLC22A1 and ABCB1, two groups were constituted: Group 1 with 70 patients with a complete cytogenetic response with standard-dose IM (400 mg/day) in 18 months, and group 2 with 48 patients without complete cytogenetic response with the initial dose of IM (400 mg/day) or have lost this response during treatment. To study the P-gp functional activity, 10 patients with haplotype 1236CC/3435CC/2677GG, 10 patients with haplotype 1236CT/3435CT/2677GT and 8 patients with haplotype 1236TT/3435TT/2677TT were enrolled. Treatment response was assessed according to European LeukemiaNet criteria. Blood samples were obtained for: quantification of BCR-ABL1, mRNA extraction, G band cytogenetic analysis, measurement of IM plasma levels and P-gp activity and expression. The ABCB1 and SLC22A1 gene expression analysis was made by real-time PCR, analysis of P-gp activity and protein expression were performed by flow cytometry and determination of plasma Levels of IM was performed by capillary electrophoresis. Results: Expression of ABCB1 and SLC22A1 were analyzed in 118 patients included and was similar between the response groups. Higher expression of the SLC22A1 gene was associated with those patients who achieved a major molecular response (MMR) in the responder group (P=0.009). There was no association between ABCB1 expression and IM response. None of the studied genes was associated with complete molecular response (CMR). In the study of P-gp activity we observed greater activity mediated by P-gp in patients with 1236CC/3435CC/2677GG haplotype when compared to those with the mutated allele. There was no difference in mRNA expression of SLC22A1 and ABCB1 genes, P-gp expression and IM plasma levels between haplotypes groups. Patients who did not achieve MMR showed a higher rate of efflux mediated by P-gp compared to individuals who did achieve this response (64.7% vs. 45.7%, P=0.001). Individuals who achieved MMR and CMR had higher median of SLC22A1 expression. Patients without MMR had lower IM plasma levels compared with those who achieved this response (0.51 µg/mL vs. 1.42 µg/mL, P=0.001). No association was observed between IM plasma levels and CMR. In conclusion patients responders to standard dose of IM (400 mg/day) and who achieved MMR have higher SLC22A1 mRNA expression and the carriers of 1236CT/3435CT/2677GT 1236TT/3435TT/2677TT haplotypes exhibit lower efflux mediated by P-gp with higher frequency of MMR.
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Dulucq, Stéphanie. "Pharmacogénétique et pharmacogénomique des inhibiteurs de tyrosine kinases : exemple de la leucémie myéloide chronique." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR21972/document.

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Les inhibiteurs de tyrosine kinases (ITKs) sont une nouvelle classe thérapeutique ayant connu un grand essor ces dix dernières années. Inhibiteurs compétitifs de l’adénosine triphosphate (ATP), ils sont utilisés dans le traitement de nombreux cancers dans lesquels une dérégulation de tyrosine kinases a été mise en évidence. Malgré une efficacité prouvée, des cas de résistance sont rapportés, en particulier avec l’exemple de la leucémie myéloïde chronique (LMC) et le traitement par ITK. Cette variabilité inter-individuelle peut être due à des mécanismes de résistance propre de la cellule tumorale ou à des variations dans les paramètres pharmacocinétiques de la molécule. De nombreuses études ont analysé l’impact de polymorphismes (SNPs) dans des gènes codants pour les déterminants pharmacocinétiques et pharmacodynamiques des ITKs. Nous avons analysé l’impact de SNPs sur l’obtention de la réponse moléculaire majeure à 1 an dans 2 cohortes de patients atteints de LMC et traités par imatinib. C1236T, G2677T/A et C3435T, 3 SNPs du gène MDR-1 codant pour la glycoprotéine P et les SNPs de la région codante du gène SLC22A1 à l’origine du transporteur d’influx hOCT1. L’impact bénéfique de l’allèle 1236T ou haplotype *4 et l’impact péjoratif de l’allèle 2677G ou haplotype *1, retrouvés dans la 1ère cohorte n’ont pas été retrouvés dans la 2ième cohorte suggérant un impact mineur voire nul de ces derniers sur la réponse à l’imatinib. L’impact des SNPs de SLC22A1 observés dans la 2ième cohorte nécessite d’être confirmé. Des travaux supplémentaires à plus grande échelle, selon des critères nécessitant d’être harmonisés, sont nécessaires avant d’espérer pouvoir aboutir à une «médecine personnalisée» pour l’imatinib mais également de façon générale pour l’ensemble des ITKs
Tyrosine kinases inhibitors (TKIs) are a new class of drugs having bloomed over the past decade. As competitive inhibitors of the adenosine triphosphate, they are used in the treatment of many cancers in which deregulation of tyrosine kinases has been demonstrated. In spite of dramatic efficacy, cases of resistance have been reported particularly with chronic myeloid leukemia (CML) and TKI treatment. This inter-individual variability may be due to mechanisms of intrinsic resistance of tumor cells or changes in the pharmacokinetic parameters of the molecule. Numerous studies have analyzed the impact of polymorphisms (SNPs) in genes coding for pharmacokinetic and pharmacodynamic determinants. We analyzed the impact of SNPs on major molecular response at 1 year in 2 cohorts of patients with CML treated with imatinib. C1236T, G2677T/A, C3435T, three SNPs in the MDR-1 gene encoding P-glycoprotein and SNPs in the coding region of the SLC22A1 gene encoding hOCT1. The protective impact of the 1236T allele or haplotype*4 and the pejorative impact of the 2677G allele or haplotype*1, found in the 1st cohort, were not replicated in the 2nd cohort, suggesting minor or no impact on the response to imatinib. The impact of SLC22A1 SNPs observed in the 2nd cohort needs to be confirmed. Further works on a larger cohort, according to criteria that need to be harmonized, are necessary before we reach a “personalized medicine” for imatinib but also for all TKIs
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HAMAJIMA, NOBUYUKI, ATSUYOSHI MORI, HIROTAKA MATSUO, KENJI WAKAI, EMI MORITA, SAYO KAWAI, TAKASHI TAMURA, et al. "No Association between MTHFR C677T and Serum Uric Acid Levels among Japanese with ABCG2 126QQ and SLC22A12 258WW." Nagoya University School of Medicine, 2013. http://hdl.handle.net/2237/17605.

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Books on the topic "SLC22A23"

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Dalbeth, Nicola. Clinical features of gout. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198748311.003.0005.

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About 60% of the variance in serum urate levels can be explained by inherited genetic factors, but the extent of the contribution of genetic factors to gout in the presence of hyperuricaemia is not known. Genome-wide association studies in Europeans have identified 28 loci controlling serum urate levels, although the molecular basis of the majority of these genetic associations is currently unknown. The SLC2A9 and ABCG2 renal and gut uric acid transporters have very strong effects on urate levels and the risk of gout. Other uric acid transporters (e.g. SLC22A11/OAT478, SLC22A12/URAT1) and a glycolysis gene (GCKR) are associated with urate levels. Environmental exposures such as sugar-sweetened beverages and alcohol interact with urate-associated genetic variants in an unpredictable fashion. Very little is known about the genetic control of gout in the presence of hyperuricaemia, formation of monosodium urate crystals, and the immune response.
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Merriman, Tony R. The genetic basis of gout. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199668847.003.0040.

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An individual’s risk of gout is determined by a complex relationship between inherited genetic variants and environmental exposures. Genetic variants that control hyperuricaemia and subsequent progression to clinical gout specify pathogenic pathways that could be therapeutically targeted. Genome-wide association studies (GWAS) have provided novel insights into the pathways leading to hyperuricaemia. GWAS have identified the renal uric acid transporter SLC2A9/GLUT9 and the gut excretory molecule ABCG2, which each have very strong genetic effects in the control of urate levels and risk of gout. Histone deacetylase inhibitors are able to correct the genetically-determined ABCG2 dysfunction. Other renal uric acid transporters, such as SLC22A11/OAT4 and SLC22A12/URAT1 have been confirmed to be genetically associated with urate and the risk of gout. Genes that generate urate during glycolysis (e.g. GCKR) are also implicated. In contrast very little is known about genetic variants that control the progression from hyperuricaemia to gout with the toll-like receptor 4 gene being the only gene with replicated evidence of association.
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Book chapters on the topic "SLC22A23"

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Stocker, Sophie L., Arian Emami Riedmaier, Matthias Schwab, and Kathleen M. Giacomini. "OCT (SLC22A) and OCTN Family." In Pharmacogenomics of Human Drug Transporters, 171–208. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118353240.ch8.

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Koepsell, Hermann. "General Overview of Organic Cation Transporters in Brain." In Handbook of Experimental Pharmacology. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/164_2021_449.

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AbstractInhibitors of Na+/Cl− dependent high affinity transporters for norepinephrine (NE), serotonin (5-HT), and/or dopamine (DA) represent frequently used drugs for treatment of psychological disorders such as depression, anxiety, obsessive-compulsive disorder, attention deficit hyperactivity disorder, and addiction. These transporters remove NE, 5-HT, and/or DA after neuronal excitation from the interstitial space close to the synapses. Thereby they terminate transmission and modulate neuronal behavioral circuits. Therapeutic failure and undesired central nervous system side effects of these drugs have been partially assigned to neurotransmitter removal by low affinity transport. Cloning and functional characterization of the polyspecific organic cation transporters OCT1 (SLC22A1), OCT2 (SLC22A2), OCT3 (SLC22A3) and the plasma membrane monoamine transporter PMAT (SLC29A4) revealed that every single transporter mediates low affinity uptake of NE, 5-HT, and DA. Whereas the organic transporters are all located in the blood brain barrier, OCT2, OCT3, and PMAT are expressed in neurons or in neurons and astrocytes within brain areas that are involved in behavioral regulation. Areas of expression include the dorsal raphe, medullary motoric nuclei, hypothalamic nuclei, and/or the nucleus accumbens. Current knowledge of the transport of monoamine neurotransmitters by the organic cation transporters, their interactions with psychotropic drugs, and their locations in the brain is reported in detail. In addition, animal experiments including behavior tests in wildtype and knockout animals are reported in which the impact of OCT2, OCT3, and/or PMAT on regulation of salt intake, depression, mood control, locomotion, and/or stress effect on addiction is suggested.
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Mukminatin, A. A., V. D. A. Ningrum, and R. Istikharah. "PCR primer design for detection of SNPs in SLC22A1 rs683369 encoding OCT1 as the main transporter of metformin." In Unity in Diversity and the Standardisation of Clinical Pharmacy Services, 161–66. CRC Press, 2017. http://dx.doi.org/10.1201/9781315112756-27.

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Conference papers on the topic "SLC22A23"

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Buyru, Nur, Seda Ekizoglu, Emin Karaman, and Turgut Ulutin. "Abstract 2146: Expression of SLC22A23 gene in laryngeal carcinoma." In Proceedings: AACR Annual Meeting 2017; April 1-5, 2017; Washington, DC. American Association for Cancer Research, 2017. http://dx.doi.org/10.1158/1538-7445.am2017-2146.

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Neul, Claudia, Sharyn D. Baker, Alex Sparreboom, Elke Schaeffeler, Stefan Laufer, Matthias Schwab, and Anne T. Nies. "Abstract 257: Evaluation of organic cation transporter 1 (OCT1, SLC22A1) as transporter for sorafenib." In Proceedings: AACR 107th Annual Meeting 2016; April 16-20, 2016; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-257.

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Pavelcova, K., J. Bohata, K. Pavelka, and B. Stiburkova. "P107 Polymorphisms in SLC2A9 and SLC22A12 genes are related to hyperuricemia, gout and also to hypouricemia." In 39th European Workshop for Rheumatology Research, 28 February–2 March 2019, Lyon, France. BMJ Publishing Group Ltd and European League Against Rheumatism, 2019. http://dx.doi.org/10.1136/annrheumdis-2018-ewrr2019.95.

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Juraszek, B., and KA Nalecz. "PO-227 Sensitising glioma cells to fatty acid oxidation inhibitor by modulation of SLC22A5 transporter activity." In Abstracts of the 25th Biennial Congress of the European Association for Cancer Research, Amsterdam, The Netherlands, 30 June – 3 July 2018. BMJ Publishing Group Ltd, 2018. http://dx.doi.org/10.1136/esmoopen-2018-eacr25.261.

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Matsui, Hirofumi. "Abstract 893: Hyperthermia regulates both SLC22A16 expression and ABCG2 expression via ROS production to enhance the cytotoxicity of doxorubicin." In Proceedings: AACR Annual Meeting 2018; April 14-18, 2018; Chicago, IL. American Association for Cancer Research, 2018. http://dx.doi.org/10.1158/1538-7445.am2018-893.

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Collet, C., H. Morel, M. Ricquebourg, M. Cohen-Solal, J. L. Laplanche, T. Pascart, T. Bardin, F. Lioté, P. Richette, and H. K. Ea. "OP0189 Identification of new and rare variants in abcg2, slc22a1 and aldh16a1 genes in crystal-proven early-onset gout." 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.4981.

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Bhutani, N., SA Guru, P. Yadav, K. Rabari, and A. Saxena. "PO-469 Role of promoter hypermethylation of hocT1 gene (SLC22A1) in response to imatinib of chronic myeloid leukaemia patients." In Abstracts of the 25th Biennial Congress of the European Association for Cancer Research, Amsterdam, The Netherlands, 30 June – 3 July 2018. BMJ Publishing Group Ltd, 2018. http://dx.doi.org/10.1136/esmoopen-2018-eacr25.489.

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Paniagua, N. Díaz, EG Tranquilino Batres, AP Lόpez Flores, A. Lozano Cardenas, E. Vallarino Reyes, AL Alvarez Grijalva, L. Sanchez Chapul, C. Díaz Hernández, L. Ríos Ventura, and A. Lopez Macay. "AB0861 Expression control by methylation of the TLR1, TLR2, TLR4, IL1B, ALPK1 SLC2A9 and SLC22A12 genes in monocytes of patients with gout." In Annual European Congress of Rheumatology, 14–17 June, 2017. BMJ Publishing Group Ltd and European League Against Rheumatism, 2017. http://dx.doi.org/10.1136/annrheumdis-2017-eular.3594.

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Wang, Chunyu, Julie Ann Mayer, David G. DeNardo, and Powel H. Brown. "Abstract 1235: The organic cation transporter SLC22A5 gene is regulated by the cooperative activity of the estrogen receptor and other transcription factors in breast cancer." In Proceedings: AACR 101st Annual Meeting 2010‐‐ Apr 17‐21, 2010; Washington, DC. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1538-7445.am10-1235.

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