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. 2011 Jul 18;16(3):462–476. doi: 10.2478/s11658-011-0020-1

Protective effect of intermedin on myocardial cell in a rat model of severe acute pancreatitis

Xiaodong Du 1, Yu Cao 1, Ping Xue 2, Ziqi Lin 2, Zhi Zeng 3,✉, Qing Xia 2
PMCID: PMC6275909  PMID: 21786034

Abstract

Severe acute pancreatitis (SAP) is a common disease with a poor prognosis. Heart failure is one cause of SAP patient death. Intermedin (IMD) is a potent endogenous cardio-protective substance. Administration of exogenous IMD showed beneficial effects in cardiovascular diseases. The aim of this study was to investigate the myocardial damage in SAP and to determine the therapeutic potential of IMD for SAP. Using an SAP rat model, we examined endogenous IMD expression following SAP induction, and determined the effect of IMD on myocardial function, histological morphology, apoptosis-related gene expression, and prognosis. Our results indicated that the cardiac function and histological structure were significantly disrupted in SAP rats. Infusion of exogenous IMD significantly preserved cardiac function and ameliorated myocardial damage. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) revealed that myocardial apoptosis was extensively present in SAP rats, and IMD infusion led to increased expression of the prosurvival factor Bcl-2, but decreased pro-apoptotic factors Bax and caspase-3. In addition, IMD infusion also reversed the change of IMD receptor systems in SAP rat heart tissue. Furthermore, we found that IMD infusion greatly decreased mortality of SAP rats. In conclusion, administration of SAP produced therapeutic effects in SAP through modulating apoptotic and pro-survival gene expression, inhibiting myocardial apoptosis, preserving cardiac function, and a useful therapeutic agent for SAP, and provides us an insight for a clinical trial of IMD for treating human severe acute pancreatitis.

Electronic Supplementary Material

Supplementary material is available for this article at 10.2478/s11658-011-0020-1 and is accessible for authorized users.

Key words: Severe acute pancreatitis, Myocardial damage, Apoptosis, Intermedin treatment

Full Text

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Abbreviations used

ADM

adrenomedullin

CGRP

calcitonin gene-related peptide

CL

calcitonin receptor-like receptor

IMD

intermedin

MODS

multiple organ dysfunction syndrome

RAMP

receptor-activity-modifying protein

SAP

severe acute pancreatitis

TUNEL

terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling

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