Stanniocalcin-1 Co-Localizes with Insulin in the Pancreatic Islets
Joint Authors
Turner, Jeffrey K.
Zaidi, Deenaz
Durst, Michelle A.
Wagner, Graham F.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-10-16
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The polypeptide hormone stanniocalcin-1 (STC-1) is widely expressed in mammals and signals both locally and systemically.
In many tissues STC-1 ligand is sequestered by target cell organelles (mitochondria, nuclei, and cholesterol lipid droplets) to exert diverse biological effects.
Most notably, STC-1 serves as an uncoupler of oxidative phosphorylation in liver, muscle, and kidney mitochondria.
The present paper describes the identification of STC-1 receptors in mouse pancreatic β cells and the discovery that the ligand co-localizes with insulin in pancreatic β cells.
In situ hybridization (ISH) analysis subsequently revealed that pancreatic β cells were the source of the ligand.
Intriguingly however, all ISH signal was localized over putative islet cell nuclei as opposed to the cell cytoplasm.
Real-time qPCR and agarose gel electrophoresis revealed that the STC-1 amplicon generated from islet cell total RNA was the same size as that from kidney.
However, relative levels of STC-1 gene expression were >100-fold lower in islets than those in kidney tissue.
Collectively, these findings are indicative of a local STC-1 signalling pathway in pancreatic β cells.
The role of STC-1 in this context remains to be established, but it could very well entail the regulation of β cell mitochondria membrane potential which is an integral aspect of regulated insulin release.
Interestingly, STC-1 immunoreactivity was not evident in embryonic pancreatic islets, suggesting that ligand synthesis may only commence postnatally.
American Psychological Association (APA)
Zaidi, Deenaz& Turner, Jeffrey K.& Durst, Michelle A.& Wagner, Graham F.. 2012. Stanniocalcin-1 Co-Localizes with Insulin in the Pancreatic Islets. ISRN Endocrinology،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-501839
Modern Language Association (MLA)
Zaidi, Deenaz…[et al.]. Stanniocalcin-1 Co-Localizes with Insulin in the Pancreatic Islets. ISRN Endocrinology No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-501839
American Medical Association (AMA)
Zaidi, Deenaz& Turner, Jeffrey K.& Durst, Michelle A.& Wagner, Graham F.. Stanniocalcin-1 Co-Localizes with Insulin in the Pancreatic Islets. ISRN Endocrinology. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-501839
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-501839