BACKGROUND: The endocannabinoid system is involved in many inflammatory diseases, such as Crohn's disease (CD) and ulcerative colitis (UC). The distribution and expression of cannabinoid receptors 1 (CNR1) and 2 (CNR2) in combination with inflammatory cytokines and RAGE (receptor of advanced glycation end products), which is also overactive in these diseases, in dependency of the extent of inflammation and alteration of the colon barrier is still unclear and needs to be elucidated. MATERIAL AND METHODS: 10 specimens of CD patients who underwent colectomy and 14 colectomy specimens of patients suffering from UC were investigated histologically for inflammatory infiltrate, extent of fibrosis and for disturbance of the intestinal barrier. Immunohistochemistry was carried out to examine the distribution and localization of CNR1, CNR2 and RAGE. Additionally, qRT-PCR was performed to study the expression of CNR1, CNR2, RAGE and inflammatory cytokines (TNFα, TGFβ, CTGF, IL12, IFNγ). 35 morphological and histological normal specimens of colectomy cases served as controls. RESULTS: The expression level of CNR2 did not differ between the control group and the group of patients with IBD, while CNR1 displayed a significant up regulation, especially in cases of CD. A differential association between the expression of CNR1/CNR2 and RAGE with morphological changes and expression of molecular markers of inflammation could be established. CONCLUSION: We showed that cannabinoid receptors are expressed differentially in inflammatory bowel disease and that the expression seems to be influenced by the underlying disease and by localized inflammation.
BACKGROUND: The endocannabinoid system is involved in many inflammatory diseases, such as Crohn's disease (CD) and ulcerative colitis (UC). The distribution and expression of cannabinoid receptors 1 (CNR1) and 2 (CNR2) in combination with inflammatory cytokines and RAGE (receptor of advanced glycation end products), which is also overactive in these diseases, in dependency of the extent of inflammation and alteration of the colon barrier is still unclear and needs to be elucidated. MATERIAL AND METHODS: 10 specimens of CDpatients who underwent colectomy and 14 colectomy specimens of patients suffering from UC were investigated histologically for inflammatory infiltrate, extent of fibrosis and for disturbance of the intestinal barrier. Immunohistochemistry was carried out to examine the distribution and localization of CNR1, CNR2 and RAGE. Additionally, qRT-PCR was performed to study the expression of CNR1, CNR2, RAGE and inflammatory cytokines (TNFα, TGFβ, CTGF, IL12, IFNγ). 35 morphological and histological normal specimens of colectomy cases served as controls. RESULTS: The expression level of CNR2 did not differ between the control group and the group of patients with IBD, while CNR1 displayed a significant up regulation, especially in cases of CD. A differential association between the expression of CNR1/CNR2 and RAGE with morphological changes and expression of molecular markers of inflammation could be established. CONCLUSION: We showed that cannabinoid receptors are expressed differentially in inflammatory bowel disease and that the expression seems to be influenced by the underlying disease and by localized inflammation.
Authors: Angela Isabel Cabrera-García; Jan S Suchodolski; Jörg M Steiner; Romy M Heilmann Journal: J Vet Diagn Invest Date: 2020-07-27 Impact factor: 1.279
Authors: Magdalena Grill; Christoph Högenauer; Andreas Blesl; Johannes Haybaeck; Nicole Golob-Schwarzl; Nerea Ferreirós; Dominique Thomas; Robert Gurke; Martin Trötzmüller; Harald C Köfeler; Birgit Gallé; Rudolf Schicho Journal: Sci Rep Date: 2019-02-20 Impact factor: 4.379
Authors: Szymon Hryhorowicz; Marta Kaczmarek-Ryś; Aleksandra Zielińska; Rodney J Scott; Ryszard Słomski; Andrzej Pławski Journal: Front Immunol Date: 2021-12-22 Impact factor: 7.561