Abstract
Apelinis an endogenousadipocytokine thatplays an important role in the regulation of cardiovascular function. Apelin-36 is a member of apelin family. However cardiac reports related to apelin-36 are very rare. The purpose of this study is to investigate the impact of apelin-36 onhemodynamic variables of the isolated rat hearts. Twenty-eight ratswere equally divided into four groups: control, apelin-36 at the following concentrations: 1 nM, 10 nM and 100 nM. Theisolatedhearts were perfused with modified Krebs-Henseleit solution (mK-Hs) by using theLangendorffmethod. Cardiac parameters, including left ventricular developed pressure (LVDP),maximal rate of pressure development (+dP/dtmax), heartrate (HR) and coronary flow (CF) were measured. Gene expressions relevant to cardiomyocyte contractility were determined by real-time PCR. 10 and 100 nM doses of apelin-36 perfusion led topositive inotropy with an increase of LVDP and +dP/dtmax, which are the indexes of cardiac contractility. Furthermore both doses of apelin-36 increased endothelial nitric oxide synthase (eNOS), sarco/endoplasmic reticulum Ca2+-ATPase (Serca2a) andβ2-Adrenergic receptors (β2-AR) mRNA. These results showed that apelin-36 had a positive inotropic effect on the isolated rat heart and can induceeNOS,Serca2aandβ2-ARgenes activation that enhancescontractilityof theheart (Tab. 1, Fig. 2, Ref. 23).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.