Pritchett J F, Sartin J L, Marple D N, Harper W L, Till M L
Horm Res. 1979;10(2-3):96-103. doi: 10.1159/000178993.
In vitro adrenal accumulation of cyclic 3'5'-adenosine monophosphate (cyclic AMP) and release of corticosterone in response to adrenocorticotropic hormone (ACTH), cyclic AMP or theophylline was assessed in 60- and 340-day-old male rats. Adrenal tissue from mature animals secreted significantly smaller quantities of corticosterone in response to ACTH, theophylline or cyclic AMP. Additionally, mature tissue accumulated significantly less cyclic AMP after treatment with ACTH or a combination of ACTH and theophylline. The data suggest an age-related refractoriness of adrenal cortical tissue to ACTH which may in part be related to decreased availability of and/or sensitivity to cyclic AMP.
在60日龄和340日龄的雄性大鼠中,评估了体外肾上腺对促肾上腺皮质激素(ACTH)、环磷酸腺苷(cAMP)或茶碱的反应中环磷酸腺苷的积累以及皮质酮的释放。成熟动物的肾上腺组织对ACTH、茶碱或环磷酸腺苷的反应分泌的皮质酮量显著减少。此外,成熟组织在用ACTH或ACTH与茶碱联合处理后积累的环磷酸腺苷显著减少。数据表明肾上腺皮质组织对ACTH存在与年龄相关的不应性,这可能部分与环磷酸腺苷的可用性降低和/或敏感性降低有关。