Neural regulation of adrenal chromaffin cell function in the mouse--stress effect on the distribution of [3H]dopamine in denervated adrenal medulla.
Effects of adrenal denervation and stress on the distribution of radioactivity in the adrenal medulla after [3H]dopamine injection was studied by light microscopic autoradiography. Denervation of the adrenal gland abolished the stress (restraint plus water immersion) induced degranulation of adrenal chromaffin cells and decreased uptake of [3H]dopamine. Denervated chromaffin cell of stress mice incorporated as high radioactivity as those of no stress mice. Adrenal denervation increased the uptake in adrenaline-storing (A) cells but not in noradrenaline-storing (NA) cells. The characteristic distribution of radioactivity (high radioactivity along the cortico-medullary junction) was reinforced by adrenal denervation. Under stress conditions, increase in pituitary adrenocortical system did not enhance the uptake of [3H]dopamine in chromaffin cell while increase in nerve activity suppressed the uptake. Spontaneous activity of the splanchnic nerve to adrenal chromaffin cells suppresses the uptake of [3H]dopamine. The neural influence is stronger on A cells than on NA cells. Chromaffin cells in the subcortical zone are more intensely controlled by the neural influence than those in the central zone.
D000313:Adrenal Medulla / Q000294:innervation*; D000818:Animals; D001345:Autoradiography; D002837:Chromaffin Granules / Q000378:metabolism; D002838:Chromaffin System / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004759:Enterochromaffin Cells / Q000378:metabolism*; D004837:Epinephrine / Q000378:metabolism; D008297:Male; D009115:Muridae; D009638:Norepinephrine / Q000378:metabolism; D013312:Stress, Physiological / Q000378:metabolism*
D004298:Dopamine; D009638:Norepinephrine; D004837:Epinephrine