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G protein-coupled receptor 30 (GPR30) is a recently de-orphanized estrogen receptor that mediates the effects of estrogens on different cells. It has been postulated that in inflammatory bowel diseases (IBD) activation of GPR30 blocks the pathways dependent on pro-inflammatory cytokines. The aim of our study was to investigate GPR30 expression in patients with IBD and its potential implication in future therapies. Fifty-seven patients were enrolled in our study: 20 subjects with Crohn's disease (CD), 22 with ulcerative colitis (UC) and 15 controls. In each subject, biopsies were taken from various left-colonic locations. Gene and protein expression of GPR30 was quantified using real time RT-PCR or Western blot. GPR30 mRNA and protein expression were detected in all tested colonic tissues. No significant differences in GPR30 gene expression were observed. In non-inflamed areas, GPR30 protein was strongly increased in CD patients, but moderately in UC patients (p= 0.014 and p=0.143, respectively, vs. controls). In CD patients, a significantly lower GPR30 protein content in inflamed than in non-inflamed tissue was observed (p=0.039). The change was independent of patient gender. Our observations indicate that GPR30 may play a role in the development and progression of inflammatory lesions in IBD, thus affecting disease severity, and consequently IBD treatment. Therefore, GPR30 may become an attractive target for novel anti-IBD drugs, particularly in CD.


Marcin Włodarczyk, Aleksandra Sobolewska-Włodarczyk, Adam I Cygankiewicz, Damian Jacenik, Aleksandra Piechota-Polańczyk, Krystyna Stec-Michalska, Wanda M Krajewska, Jakub Fichna, Maria Wiśniewska-Jarosińska. G Protein-Coupled Receptor 30 (GPR30) Expression Pattern in Inflammatory Bowel Disease Patients Suggests its Key Role in the Inflammatory Process. A Preliminary Study. Journal of gastrointestinal and liver diseases : JGLD. 2017 Mar;26(1):29-35

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PMID: 28338111

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