AIM: To produce an antibody against rat eosinophil cationic protein (ECP) and to examine the effects of the antibody in rats with dextran sulfate sodium (DSS)-induced colitis. METHODS: An antibody was raised aga...AIM: To produce an antibody against rat eosinophil cationic protein (ECP) and to examine the effects of the antibody in rats with dextran sulfate sodium (DSS)-induced colitis. METHODS: An antibody was raised against rat ECP. Rats were treated with 3% DSS in drinking water for 7 d and received the antibody or normal serum. The colons were examined histologically and correlated with clinical symptoms. Immunohistochemistry and Western blot analysis were estimated as a grade of inflammation. RESULTS: The ECP antibody stained the activated eosinophils around the injured crypts in the colonic mucosa. Antibody treatment reduced the severity of colonic ulceration and acute clinical symptoms (diarrhea and/or bloodstained stool). Body weight gain was significantly greater and the colon length was significantly longer in anti-ECPtreated rats than in normal serum-treated rats. Expression of ECP in activated eosinophils was associated with the presence of erosions and inflammation. The number of Ki-67-positive cells in the regenerated surface epithelium increased in anti-ECP-treated rats compared with normal serum-treated rats. Western blot analysis revealed reduced expression of macrophage migration inhibitory factor (MIF) in anti-ECP-treated rats. CONCLUSION: Our results indicate that treatment with ECP antibody, improved DSS-induced colitis in rats, possibly by increasing the regenerative activity of the colonic epithelium and downregulation of the immune response, and suggest that anti-ECP may promote intestinal wound healing in patients with ulcerative colitis (UC).展开更多
Henoch-Schönlein purpura,the most common childhood vasculitis,is often a self-limiting condition,with resolution within 2-8 weeks.Approximately 20%-40%of the patients develop a renal involvement.[1]Eosinophil cat...Henoch-Schönlein purpura,the most common childhood vasculitis,is often a self-limiting condition,with resolution within 2-8 weeks.Approximately 20%-40%of the patients develop a renal involvement.[1]Eosinophil cationic protein is a secretory ribonuclease which has been associated with cytotoxic,neurotoxic,fibrosis promotion and immuneregulatory functions and has been implicated in various disease conditions.[2]This study was undertaken to clarify a possible role of eosinophil cationic protein in Italian children with Henoch-Schönlein purpura.展开更多
基金Supported by a grant-in-aid from the Ministry of Science, Education, Sports and Culture of Japan, No. 14570193
文摘AIM: To produce an antibody against rat eosinophil cationic protein (ECP) and to examine the effects of the antibody in rats with dextran sulfate sodium (DSS)-induced colitis. METHODS: An antibody was raised against rat ECP. Rats were treated with 3% DSS in drinking water for 7 d and received the antibody or normal serum. The colons were examined histologically and correlated with clinical symptoms. Immunohistochemistry and Western blot analysis were estimated as a grade of inflammation. RESULTS: The ECP antibody stained the activated eosinophils around the injured crypts in the colonic mucosa. Antibody treatment reduced the severity of colonic ulceration and acute clinical symptoms (diarrhea and/or bloodstained stool). Body weight gain was significantly greater and the colon length was significantly longer in anti-ECPtreated rats than in normal serum-treated rats. Expression of ECP in activated eosinophils was associated with the presence of erosions and inflammation. The number of Ki-67-positive cells in the regenerated surface epithelium increased in anti-ECP-treated rats compared with normal serum-treated rats. Western blot analysis revealed reduced expression of macrophage migration inhibitory factor (MIF) in anti-ECP-treated rats. CONCLUSION: Our results indicate that treatment with ECP antibody, improved DSS-induced colitis in rats, possibly by increasing the regenerative activity of the colonic epithelium and downregulation of the immune response, and suggest that anti-ECP may promote intestinal wound healing in patients with ulcerative colitis (UC).
文摘Henoch-Schönlein purpura,the most common childhood vasculitis,is often a self-limiting condition,with resolution within 2-8 weeks.Approximately 20%-40%of the patients develop a renal involvement.[1]Eosinophil cationic protein is a secretory ribonuclease which has been associated with cytotoxic,neurotoxic,fibrosis promotion and immuneregulatory functions and has been implicated in various disease conditions.[2]This study was undertaken to clarify a possible role of eosinophil cationic protein in Italian children with Henoch-Schönlein purpura.