{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T17:26:17Z","timestamp":1788197177111,"version":"build-2803163510"},"reference-count":62,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,9,15]],"date-time":"2021-09-15T00:00:00Z","timestamp":1631664000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Genes"],"abstract":"<jats:p>P-glycoprotein encoded by the ABCB1 gene constitutes a molecular barrier in the small and large bowel epithelium, and its different expression may influence susceptibility to inflammatory bowel disease (IBD). We aimed to assess the contribution of the C3435T polymorphism to disease risk in the Polish population. A total of 100 patients (50 Crohn\u2019s disease (CD), 50 ulcerative colitis (UC)) and 100 healthy controls were genotyped for the single nucleotide polymorphism (SNP) C3435T by using the PCR-RFLP method. Patients were classified on the basis of disease phenotype and the specific treatment used. A meta-analysis was carried out of our results and those from previously published Polish studies. There was no significant difference in allele and genotype frequencies in IBD patients compared with controls. For CD patients, a lower frequency of TT genotype in those with colonic disease, a lower frequency of T allele, and a higher frequency of C allele in those with luminal disease were observed, whereas for UC patients, a lower frequency of CT genotype was observed in those with left-sided colitis. A meta-analysis showed a tendency towards higher prevalence of CC genotype in UC cases. These results indicate that the C3435T variants may confer a risk for UC and influence disease behaviour.<\/jats:p>","DOI":"10.3390\/genes12091419","type":"journal-article","created":{"date-parts":[[2021,9,15]],"date-time":"2021-09-15T12:00:44Z","timestamp":1631707244000},"page":"1419","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["C3435T Polymorphism of the ABCB1 Gene in Polish Patients with Inflammatory Bowel Disease: A Case\u2013Control and Meta-Analysis Study"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2397-7028","authenticated-orcid":false,"given":"Pawe\u0142","family":"Petryszyn","sequence":"first","affiliation":[{"name":"Department of Clinical Pharmacology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Dudkowiak","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Agnieszka","family":"Gruca","sequence":"additional","affiliation":[{"name":"Department of Clinical Pharmacology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ewa","family":"Ja\u017awi\u0144ska-Tarnawska","sequence":"additional","affiliation":[{"name":"Department of Clinical Pharmacology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pawe\u0142","family":"Ekk-Cierniakowski","sequence":"additional","affiliation":[{"name":"Warsaw School of Economics, 00-968 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"El\u017cbieta","family":"Poniewierka","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Wiela-Hoje\u0144ska","sequence":"additional","affiliation":[{"name":"Department of Clinical Pharmacology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Krystyna","family":"G\u0142owacka","sequence":"additional","affiliation":[{"name":"Department of Clinical Pharmacology, Wroclaw Medical University, 50-571 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zhao, M., G\u00f6nczi, L., Lakatos, P.L., and Burisch, J. 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