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Background and Aims Cardiovascular disease (CVD) is a major cause of mortality in patients with chronic kidney disease (CKD). Renal ischemia-reperfusion injury (IRI) is a clinically significant condition that progress to CKD after acute kidney injury (AKI). We have reported that the suppression of Trimethylamine-N-oxide (TMAO), a hepatic metabolic product of trimethylamine generated from dietary phosphatidylcholine, by linaclotide could prevent renal fibrosis and improve renal function in the chronic phase after renal IRI. TMAO has been linked directly with progression of CVD too. We investigated whether the reduction of TMAO by linaclotide limits cardiac fibrosis in mouse model of CKD after IRI. Method Linaclotide (100μg/kg) was administered for 2weeks before IRI and continued for 2weeks after IRI. After 2weeks since IRI, removed hearts sections were performed Azan stain to evaluate the level of fibrosis and western blotting to evaluate the expression level of fibronectin. Results The administration of linaclotide significantly improved cardiac fibrosis area (Fig1). Additionally, western blotting showed linaclotide suppress the expression level of fibronectin (Fig2). Conclusion The reduction of TMAO by linaclotide could prevent cardiac fibrosis in the chronic phase after renal IRI. Linaclotide may be a powerful tool for prevention of the cardiorenal syndrome after renal IRI.

nephrology, dialysis, transplantation/nephrology dialysis transplantation

P0689LINACLOTIDE, THE GUANYLATE CYCLASE C AGONIST LIMITS CARDIAC FIBROSIS FORMATION IN MICE WITH CHRONIC KIDNEY DISEASE AFTER ISCHEMIA-REPERFUSION INJURY