人参总皂甙增加白血病细胞对化疗药物的敏感性

目的：探讨人参总皂甙（ＴＳＰＧ）对急性髓细胞白血病（ＡＭＬ）化疗药物敏感性的作用。方法：采用白血病祖细胞集落形成（ＣＦＵ－ＡＭＬ）药敏试验法。选用４种化疗药物：高三尖杉酯碱（ＨＨｒ）、阿糖胞苷（Ａｒａ）、阿霉素（Ａｄｒ）和足叶乙甙（Ｖｐ－１６）。结果：ＴＳＰＧ刺激ＣＦＵ－ＡＭＬ在体外增殖，集落数提高３７．９８％，使化疗药物对ＣＦＵ－ＡＭＬ的抑制率从原先的３０．４％￣４７．４％分别提高到５１．２％￣

Potentiated Effects of Total Saponins of Panax Ginseng on Inhibition of Leukemic Cells by Cytotoxic Drugs

OBJECTIVE: To investigate the potentiated effects of total saponins of Panax Ginseng (TSPG) on inhibition of leukemic progenitor cells by cytotoxic drugs in acute myelocytic leukemia. METHODS: Using bone marrow culture of colony forming unite-acute myeloid leukemia (CFU-AML) method, the sensitivity of leukemic cells obtained from 18 patients to homoharringtonin (HHr), cytarabine (Ara), adriamycin (Adr) and etoposide (VP-16) were detected separately. RESULTS: TSPG alone (20 micrograms/ml) could stimulate proliferation of CFU-AML obviously, and increase the colony numbers by 37.98% over the non-TSPG control (P < 0.01). In the presence of TSPG, the inhibition rates of CFU-AML of HHr, Ara, Adr and VP-16 were 51.2%-62.0% respectively, which were significantly higher than 30.4%-47.4% of non-TSPG control (all P < 0.01). In the combination of TSPG with cytotoxic drugs, the leukemic progenitor cells became more sensitive to cytotoxic drugs, CFU-AML colony numbers at 1.84-2.23 fold as more as those of non-TSPG control were inhibited by HHr, Ara, Adr and VP-16. Sensitivity test of 17 among 72 drugs reversed from resistant (suppression rate less than 30%) to sensitive (suppression rate more than 30%) by TSPG. CONCLUSIONS: TSPG could drive non-cycling leukemic progenitors to enter cell cycle, and thereby enhance their susceptibility to cytotoxic drugs.