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Notably, H2R signaling enhances antigen uptake and cross-presentation (29), decreases the IFN- and TNF- produced by pDCs (30), and promotes Th2-skewing DC polarization (31, 32)
January 11, 2021
Oxidative stress is a potential mechanism underlying intestinal epithelial barrier dysfunction as it can induce direct epithelial cell damage and disrupt TJ and/or AJ function and structure.1215 Possible factors causing oxidative damage in the intestine of patients with cirrhosis include ingested alcohol,16 changes in intestinal microbiota,4,17,18 intestinal inflammation11,19 and disturbed microcirculation of the intestinal mucosa secondary to portal hypertension.1,20,21 In addition, systemic inflammation and oxidative stress as well as oxidative stress inducers produced in the liver, may be transferred to the intestine via blood and bile.15,22 These factors together with a decreased antioxidant status in cirrhotic patients23 may promote intestinal oxidative damage
In aging, GHK's effect on pulmonary fibroblasts may restore youthful phenotypes, improving fibroblast migration and collagen contraction
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