DIFFERENT EFFECTS OF K+ AND CA++ ON ALPHA-MSH AND ACTH RELEASE FROM SUPER-FUSED NEUROINTERMEDIATE LOBE OF THE RAT HYPOPHYSIS

被引:35
作者
SCHMITT, G
BRIAUD, B
MIALHE, C
STUTINSKY, F
机构
[1] Institute of Physiology, University Louis Pasteur, Strasbourg
关键词
ACTH; Ca[!sup]++[!/sup; K[!sup]+[!/sup; Neurointermediate lobe; α-MSH;
D O I
10.1159/000122875
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The effects of K+-enhanced and Ca++-free media on α -MSH and adrenocorticotropic hormone (ACTH) release from superfused neurointermediate lobe (NIL) were studied in the same experiments. High K+ caused reversible and repeatable inhibition of α -MSH release and stimulation of ACTH release. Removal of Ca++ impaired the effect of K+, irreversibly for α -MSH and reversibly for ACTH. The existence of both melanotrophic and corticotrophic cells within the intermediate lobe (IL) of rat hypophysis could account for the different effects of ionic modifications on in vitro a-MSH and ACTH release. © 1979 S. Karger AG, Basel.
引用
收藏
页码:297 / 301
页数:5
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