Rapaport E, Zamecnik P C
Proc Natl Acad Sci U S A. 1976 Sep;73(9):3122-5. doi: 10.1073/pnas.73.9.3122.
The incorporation of [3H]adenosine, [3H]adenine, and [3H]hypoxanthine into adenine nucleotides of nude (athymic) mouse liver and human hepatoma grown subcutaneously in nude mice was studied. 3H and 32P radioactive labeling in vivo of acid-soluble nucleotides followed by chromatographic procedures indicated that, in contrast to [3H]adenine and [3H]hypoxanthine, [3H]adenosine is preferentially incorporated into ATP in comparison with its incorporation into AMP and ADP. This phenomenon, as well as complementing the recently reported 3-fold increase in total cellular ATP upon treatmen- with 0.5-1.0 mM concentrations of adenosine, indicates the formation from adenosine of compartmentalized ATP that is not produced from either adenine or hypoxanthine. The observed effect is of larger magnitude in the growth-arrested normal liver than in the actively growing tumor.
研究了[3H]腺苷、[3H]腺嘌呤和[3H]次黄嘌呤掺入裸(无胸腺)鼠肝脏以及皮下接种于裸鼠的人肝癌组织腺嘌呤核苷酸的情况。体内对酸溶性核苷酸进行3H和32P放射性标记,随后采用色谱法分析表明,与[3H]腺嘌呤和[3H]次黄嘌呤相比,[3H]腺苷优先掺入ATP,而非AMP和ADP。这一现象,以及近期报道的用0.5 - 1.0 mM浓度腺苷处理后细胞内总ATP增加3倍的情况,均表明腺苷可形成分隔化的ATP,而腺嘌呤或次黄嘌呤无法产生这种ATP。在生长停滞的正常肝脏中观察到的这种效应比在活跃生长的肿瘤中更为显著。