Jabara A G, Toyne P H, Harcourt A G
Br J Cancer. 1973 Jan;27(1):63-71. doi: 10.1038/bjc.1973.8.
A reduction in tumour yield was apparent when progesterone administration was begun 25 days before feeding 7,12-dimethylbenz(a)anthracene (DMBA). This effect was most obvious when the duration of hormone administration was brief. Continuation of progesterone for some time after feeding DMBA caused a progressive diminution of the inhibitory effect, and 135 days of continuous hormone treatment entirely abolished the effects of 25 days pretreatment with the hormone.In contrast, when progesterone injections were begun 2 days after feeding DMBA, there was a trend towards enhancement of tumour yield. Continuous hormone administration appeared more effective than shorter treatment regimens.
在喂食7,12-二甲基苯并(a)蒽(DMBA)前25天开始给予孕酮时,肿瘤发生率明显降低。当激素给药持续时间较短时,这种效果最为明显。在喂食DMBA后继续给予孕酮一段时间会导致抑制作用逐渐减弱,连续135天的激素治疗完全消除了激素预处理25天的效果。相比之下,在喂食DMBA后2天开始注射孕酮时,肿瘤发生率有增加的趋势。持续激素给药似乎比短期治疗方案更有效。