Timing of Ca2+ response in pancreatic beta-cells is related to mitochondrial mass
Research output: Contribution to journal › Journal article › Research › peer-review
The timing and magnitude of calcium response are cell-specific in individual beta-cells. This may indicate that the cells have different roles in the intact islet. It is unknown what mechanisms determine these characteristics. We previously found that the mechanisms setting cell-specific response timing are disturbed in beta-cells from hyperglycemic mice and one of the causes is likely to be an altered mitochondrial metabolism. Mitochondria play a key role in the control of nutrient-induced insulin secretion. Here, we used confocal microscopy with the fluorescent probe MitoTracker Red CMXRos and Fluo-3 to study how the amount of active mitochondria is related to the lag-time and the magnitude of calcium response to 20mM glucose in isolated beta-cells and in cells within intact lean and ob/ob mouse islets. Results show that the mitochondrial mass is inversely correlated with the lag-times for calcium response both in lean and ob/ob mouse beta-cells (r=-0.73 and r=-0.43, respectively, P<0.05). Thus, the state of mitochondria may determine the timing of calcium response.
Original language | English |
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Journal | Molecular Cell Biology Research Communications |
Volume | 340 |
Issue number | 4 |
Pages (from-to) | 1119-24 |
Number of pages | 6 |
ISSN | 0006-291X |
DOIs | |
Publication status | Published - 24 Feb 2006 |
- Animals, Calcium, Cells, Cultured, Glucose, Insulin-Secreting Cells, Metabolic Clearance Rate, Mice, Mitochondria, Journal Article, Research Support, Non-U.S. Gov't
Research areas
ID: 172513426