摘要
Sp) Octyl 8 chloroadenosine 3′5′cyclophosphate (OCC), a newly synthesized 8 Cl c AMP derivative, strongly induced inhibition and differentiation in human leukemia HL 60 cells. In flow cytometry, OCC brought about a block at the G1 phase of HL 60 cell cycle. OCC inhibited strongly the synthesis of DNA without affecting the synthesis of RNA and protein in HL 60 cells and also activated the c AMP dependent protein kinase in the cytosol of HL 60 cells. 8 Chloroadenosine is the active metabolite of OCC and inhibited significantly the growth of tumour in vitro and in vivo tests. 8 Chloroadenosine can induce differentiation of gastric mucoid adenocarcinoma cell line MGc80 3 and induce apoptosis in the MOLT 4 cells. The mechanism of the antitumour effects of 8 chloroadenosine was discussed.
（Ｓｐ）－８－氯腺苷３′，５′环磷酸辛酯（ＯＣＣ）是８－氯腺苷３′，５′环磷酸的新衍生物，对人白血病细胞ＨＬ－６０有很强的抑制作用和诱导分化作用。用细胞流式光度术发现ＯＣＣ阻断ＨＬ－６０细胞周期于Ｇ１期。ＯＣＣ对ＨＬ－６０细胞ＤＮＡ合成有显著抑制作用，但不影响ＲＮＡ和蛋白质合成。ＯＣＣ能激活ＨＬ－６０细胞浆中蛋白激酶Ａ。８－氯腺苷是ＯＣＣ的活性代谢产物，能在体外和体内实验中明显抑制肿瘤的生长。８－氯腺苷也能诱导人胃癌ＭＧｃ８０－３细胞分化和人Ｔ淋巴母细胞ＭＯＴＬ－４的凋亡。本文讨论了８－氯腺苷抗肿瘤作用的机理。
