[Stimulation of calcium intake by growth-hormone-releasing-hormone in GH3 cells]. / Stimulation de l'entrée de calcium par le Growth-Hormone-Releasing-Hormone dans les cellules GH3.

The effect of GH-RH in the intra-cytosolic free Ca2+ concentration was studied in GH3 cells. To this end, we have used microspectrofluorimetry performed on single cells. We show that 60% of cells respond to a brief application of 100 nM GH-RH by an increase of their [Ca2+]i (mean increase 100% over basal values). This response which is blocked by calcium channel inhibitors results from an increased influx of Ca2+ ions from the external medium.