Hii C S, Stutchfield J, Howell S L
Biochem J. 1986 Jan 1;233(1):287-9. doi: 10.1042/bj2330287.
The phorbol ester 4 beta-phorbol 12-myristate 13-acetate (PMA), at concentrations of 0.1 microM and above, stimulated secretion of glucagon and of insulin from isolated rat islets of Langerhans incubated in the presence of 5.5 mM-glucose. Stimulation of secretion of both hormones by 1 microM-PMA persisted in the absence of external Ca2+, and could be abolished by incubating the islets at 4 degrees C. These findings suggest a role of protein kinase C in the alpha-cell (and beta-cell) secretory mechanism.
佛波酯4β-佛波醇12-肉豆蔻酸酯13-乙酸酯(PMA),浓度在0.1微摩尔及以上时,可刺激在5.5毫摩尔葡萄糖存在下孵育的离体大鼠胰岛分泌胰高血糖素和胰岛素。1微摩尔PMA对两种激素分泌的刺激在无细胞外Ca2+时仍持续存在,且将胰岛在4℃孵育可消除这种刺激。这些发现提示蛋白激酶C在α细胞(及β细胞)分泌机制中起作用。