Lima D R, Kilfeather S, Hedges A, Turner P
Br J Clin Pharmacol. 1981 Jun;11(6):555-9. doi: 10.1111/j.1365-2125.1981.tb01170.x.
1 The influence of acebutolol, atenolol, pindolol and timolol on human lymphocyte cyclic AMP (cAMP) and its stimulation by isoprenaline in vitro has been studied. 2 Acebutolol and atenolol (10(-8)-10(-6)M) had no significant influence on lymphocyte cAMP levels or on isoprenaline-stimulated increase in cAMP. 3 Pindolol and timolol significantly antagonised the effect of isoprenaline, and pA2 values were calculated to be 8.12 and 8.04 respectively. This suggests that beta 2-adrenoceptors are involved in this phenomenon. 4 Only pindolol produced a significant increase in lymphocyte cAMP, which is consistent with its partial agonist activity.
已研究了醋丁洛尔、阿替洛尔、吲哚洛尔和噻吗洛尔对人淋巴细胞环磷酸腺苷(cAMP)的影响及其在体外对异丙肾上腺素刺激cAMP的作用。
醋丁洛尔和阿替洛尔(10⁻⁸ - 10⁻⁶M)对淋巴细胞cAMP水平或异丙肾上腺素刺激的cAMP增加无显著影响。
吲哚洛尔和噻吗洛尔显著拮抗异丙肾上腺素的作用,计算出的pA2值分别为8.12和8.04。这表明β₂肾上腺素能受体参与了这一现象。
仅吲哚洛尔使淋巴细胞cAMP显著增加,这与其部分激动剂活性一致。