Title : Lactate stimulates insulin secretion without blocking the K+ channels in HIT-T15 insulinoma cells.

Pub. Date : 1999 Apr

PMID : 10333080






4 Functional Relationships(s)
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1 Lactate stimulates insulin secretion without blocking the K+ channels in HIT-T15 insulinoma cells. Lactic Acid insulin Mesocricetus auratus
2 To clarify the mechanism by which lactate affects insulin secretion, we investigated the effect of lactate on insulin secretion, cytosolic free Ca2+ ([Ca2+](i), the ATP sensitive K+ channel (K(ATP)) and the Ca2+-activated K+ channel (K(Ca)) in HIT-T15 cells, and the results were compared with those of glucose and glibenclamide. Lactic Acid insulin Mesocricetus auratus
3 Lactate at a concentration of 10 mmol/l activated both the K(ATP) and KCa channels, not only in cell-attached, but also in inside-out patch configurations, indicating that the increase in [Ca2+](i) and secretion of insulin by lactate cannot be explained by the blocking of the K+ channels. Lactic Acid insulin Mesocricetus auratus
4 Lactate at a concentration of 10 mmol/l activated both the K(ATP) and KCa channels, not only in cell-attached, but also in inside-out patch configurations, indicating that the increase in [Ca2+](i) and secretion of insulin by lactate cannot be explained by the blocking of the K+ channels. Lactic Acid insulin Mesocricetus auratus