Ghrelin and its receptor, the growth hormone secretagogue receptor 1a (GHSR1a), are present in cardiac tissue. Activation of GHSR1a by ghrelin promotes cardiomyocyte contractility and survival, and changes in myocardial GHSR1a and circulating ghrelin track with end-stage heart failure, leading to the hypothesis that GHSR1a is a biomarker for heart failure. We hypothesized that GHSR1a could also be a biomarker for diabetic cardiomyopathy (DCM). We used two models of streptozotocin (STZ)-induced DCM: group 1, adult mice treated with 35 mg/kg STZ for 3 days; and group 2, neonatal mice treated with 70 mg/kg STZ at days 2 and 5 after birth. In group 1, mild fasting hyperglycemia (11 mM) was first detected 8 weeks after the last injection, and in group 2, severe fasting hyperglycemia (20 mM) was first detected 1 to 3 weeks after the last injection. In group 1, left ventricular function was slightly impaired as measured by echocardiography, and Western blot analysis showed a significant decrease in myocardial GHSR1a. In group 2, GHSR1a levels were also decreased as assessed by Cy5-ghrelin(1-19) fluorescence microscopy, and there was a significant negative correlation between GHSR1a levels and glucose tolerance. There were significant positive correlations between GHSR1a and ghrelin and between GHSR1a and sarcoplasmic reticulum Ca2+-ATPase 2a (SERCA2a), a marker for contractility, but not between GHSR1a and B-type natriuretic peptide, a marker for heart failure. We conclude that the subclinical stage of DCM is accompanied by alterations in the myocardial ghrelin-GHSR1a system, suggesting the possibility of a biomarker for DCM.
Pubmed ID: 29450407 RIS Download
Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.
Commercial vendor and service provider of laboratory reagents and antibodies. Supplier of scientific instrumentation, reagents and consumables, and software services.
View all literature mentionsA software program used to control G:BOX hardware, specifically to capture and process images. While viewing images in real time, GeneSnap controls the illumination and exposure length of the lens, as well as the focussing, zooming and iris setting of a motorized lens.
View all literature mentionsMus musculus with name C57BL/6J from IMSR.
View all literature mentionsThis polyclonal targets Rabbit Rabbit IgG secondary - H&L - Pre-Adsorbed
View all literature mentionsThis unknown targets Rabbit IgG (H+L)
View all literature mentionsThis unknown targets IgG (H+L)
View all literature mentionsThis polyclonal targets BNP antibody
View all literature mentionsThis polyclonal targets SERCA2 ATPase
View all literature mentionsNorthern Eclipse 6.0 software is a Windows based full Image Analysis and Archiving System with a full suite of Image Processing techniques, Morphological and Densitometry measuring routines, digital and analogue camera control, SDK for custom camera driver solutions, 3D-Reconstruction, De-Convolution and programmable via 3 levels of automation plus access to hundreds of OLE applications and thousands of scripts.
View all literature mentionsSoftware package as distribution of ImageJ and ImageJ2 together with Java, Java3D and plugins organized into coherent menu structure. Used to assist research in life sciences.
View all literature mentionsOpen source Java based image processing software program designed for scientific multidimensional images. ImageJ has been transformed to ImageJ2 application to improve data engine to be sufficient to analyze modern datasets.
View all literature mentions