Kiely, Aoife, McClenaghan, Neville, Flatt, Peter and Newsholme, Philip (2007) Pro-inflammatory cytokines increase glucose, alanine and triacylglycerol utilization but inhibit insulin secretion in a clonal pancreatic beta-cell line. JOURNAL OF ENDOCRINOLOGY, 195 (1). pp. 113-123. [Journal article]
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We have investigated the effects of prolonged exposure (24 h) to pro-inflammatory cytokines on beta-cell metabolism and insulin secretion using clonal BRIN-BD11 beta cells. Addition of IL-1 beta, tumour necrosis factor-alpha and IFN-gamma (at concentrations that did not induce apoptosis) inhibited chronic (24 h) and acute stimulated levels of insulin release (by 59 and 93% respectively), increased cellular glucose and alanine consumption, and also elevated lactate and glutamate release. However, ATP levels and cellular triacylglycerol were decreased while glutathione was increased. We conclude that sub-lethal concentrations of pro-inflammatory cytokines appear to shift P-cell metabolism away from a key role in energy generation and stimulus-secretion coupling and towards a catabolic state which may be related to cell defence.
|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:||17 Dec 2009 11:18|
|Last Modified:||15 Jun 2011 11:10|
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