Dixon, G, Nolan, J, McClenaghan, Neville, Flatt, Peter and Newsholme, P (2003) A comparative study of amino acid consumption by rat islet cells and the clonal beta-cell line BRIN-BD11 - the functional significance of L-alanine. JOURNAL OF ENDOCRINOLOGY, 179 (3). pp. 447-454. [Journal article]
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Evidence has been published that L-alanine may, under appropriate conditions, promote insulin secretion in normal rodent islets and various beta cell lines. Previous results utilising the clonal beta-cell line BRIN-BD11, demonstrated that alanine dramatically elevated insulin release by a mechanism requiring oxidative metabolism. We demonstrate in this paper that addition Of L-alanine had an insulinotropic effect in dispersed primary islet cells. Addition Of D-glucose increased L-alanine consumption in both BRIN-BD11 cells and primary islet cells. L-glutamine consumption in the BRIN-BD11 cell line and primary rat islets was also determined. The consumption rate was in line with that previously reported for cells of the immune system and other glutamine-utilising cells or tissues. However, L-alanine consumption was at least an order of magnitude higher than L-glutamine consumption. The metabolism Of L-alanine in the beta-cell may result in stimulation of insulin secretion via generation of metabolic stimulus secretion coupling factors such as L-glutamate.
|Item Type:||Journal article|
|Faculties and Schools:||Faculty of Life and Health Sciences|
Faculty of Life and Health Sciences > School of Biomedical Sciences
|Research Institutes and Groups:||Biomedical Sciences Research Institute|
Biomedical Sciences Research Institute > Diabetes
|Deposited By:||Professor Peter Flatt|
|Deposited On:||14 Jan 2010 15:46|
|Last Modified:||15 Jun 2011 11:10|
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