Increased expression of MIP-3α/CCL20 in peripheral blood mononuclear cells from patients with ulcerative colitis and its down-regulation by sulfasalazine and …

HJ Lee, SC Choi, MH Lee, HM Oh… - Inflammatory bowel …, 2005 - academic.oup.com
HJ Lee, SC Choi, MH Lee, HM Oh, EY Choi, EJ Choi, KJ Yun, GS Seo, SW Kim, JG Lee…
Inflammatory bowel diseases, 2005academic.oup.com
Background CCL20 expression is known to increase in the mucosal tissues of inflammatory
bowel diseases (IBDs). Moreover, the discovery of Nod2 as the IBD1 susceptibility gene has
underscored the significance of blood mononuclear cells in IBD pathogenesis. Methods This
study addresses whether CCL20 expression is similarly altered in peripheral blood
mononuclear cells (PBMCs) of patients with ulcerative colitis (UC), a major type of IBD in
Korea. Results Expression of CCL20 was significantly up-regulated in the PBMCs of patients …
Background
CCL20 expression is known to increase in the mucosal tissues of inflammatory bowel diseases (IBDs). Moreover, the discovery of Nod2 as the IBD1 susceptibility gene has underscored the significance of blood mononuclear cells in IBD pathogenesis.
Methods
This study addresses whether CCL20 expression is similarly altered in peripheral blood mononuclear cells (PBMCs) of patients with ulcerative colitis (UC), a major type of IBD in Korea.
Results
Expression of CCL20 was significantly up-regulated in the PBMCs of patients with UC compared with those of normal healthy controls. Interestingly, untreated UC groups expressed higher levels of CCL20 mRNA than either treated UC or normal control groups, suggesting that CCL20 could be modulated by anti-inflammatory drugs. Accordingly, a strong association between CCL20 levels and disease activity index was observed. Supporting these findings, results from a 3-month follow-up study revealed that the UC groups treated with 5-aminosalicylic acid and glucocorticoid exhibited dramatic decreases of CCL20 mRNA in PBMCs, accompanied by ameliorated disease states. Moreover, tumor necrosis factor-α− or interleukin-1β-induced CCL20 secretion was greatly diminished by 5-aminosalicylic acid and/or glucocorticoid treatment of human intestinal epithelial HT-29 cells. Of note, CCR6+ cell populations were significantly reduced in the blood of severe patients with UC compared with normal controls, whereas no significant changes in CCR6+ cell populations were observed in the blood of patients with mild UC or acute colitis.
Conclusions
Collectively, these findings suggest that CCL20 expression in blood mononuclear cells is associated with altered immune and inflammatory responses in patients with UC.
Oxford University Press