SYSTEMIC GENE-THERAPY WITH P53 REDUCES GROWTH AND METASTASES OF A MALIGNANT HUMAN BREAST-CANCER IN NUDE-MICE

被引:146
作者
LESOONWOOD, LA
KIM, WH
KLEINMAN, HK
WEINTRAUB, BD
MIXSON, AJ
机构
[1] NIDDKD,MOLEC & CELLULAR ENDOCRINOL BRANCH,BETHESDA,MD 20892
[2] NIDR,DEV BIOL LAB,CELL BIOL SECT,BETHESDA,MD 20892
关键词
D O I
10.1089/hum.1995.6.4-395
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
We report on an in vivo delivery system that attenuates the growth, in nude mice, of a malignant human breast cancer cell line containing a p53 mutation. Nude mice, inoculated with breast carcinoma cells, were injected every 10-12 days with a liposome-p53 complex via the tail vein. A significant reduction of greater than 60% in primary tumor volume was observed as compared to the control groups. Furthermore, when individual growth patterns of the tumors were assessed, we found that primary tumor size regressed in the majority of p53-treated animals (8/15), whereas only one tumor in the control groups (1/22) regressed. The eight tumors that regressed with the liposome-p53 complex showed no evidence of relapse for 1 month after the cessation of treatment. We also determined that the administration of the liposome-p53 complex reduced the incidence of metastases. The MDA-MB-435 tumor cells, transduced with the lacZ gene, facilitated quantitation of beta-galactosidase activity and tumor burden in the lungs. The number of metastatic cells in the lung was significantly lower in the p53-treated group (0.53 +/- 0.43 x 10(6), p < 0.01) than in either the vector-treated (8.1 +/- 3.7 x 10(6)) or untreated control groups (15.8 +/- 5.9 x 10(6)). Thus, systemic administration of the liposome-p53 complex reduced not only the size of the primary tumors but, more importantly, prevented the relapse and metastases of these tumors.
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页码:395 / 405
页数:11
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