Objective： To evaluate the tumor selectivity and therapeutic efficiency of replication-competent adenovirus CNHK300 on human breast cancer cells. Methods： RT-PCR was used to detect the hTERT mRNA activity in various...Objective： To evaluate the tumor selectivity and therapeutic efficiency of replication-competent adenovirus CNHK300 on human breast cancer cells. Methods： RT-PCR was used to detect the hTERT mRNA activity in various breast cancer and normal fibroblast cell lines. Virus proliferation assay, cell viability assay and Western blot were applied to evaluate the proliferation and cytolysis selectivity of CNHK300. Results： The telomerase activity of MCF-7, BT-549 and SK-BR-3 was positive, while telomerase in MRC-5 and BJ was negative. The progeny virus titers in MCF-7, BT-549 and SK-BR-3 after 48 h of CNHK300 exposure was 40 625, 1 265 and 20 000 fold higher than those of 0 h, even slightly higher than those of wtAd5 （except in SK-BR-3）. ONYX-015 virus proliferation ability was weaker than that of CNHK300 in cancer cells. However, CNHK300 exhibited attenuated replicative ability as compared with wtAd5 in MRC-5 and BJ. The CNHK300 replicatative multiple was 63 and 192 fold at 48 h respectively, while the wtAd5 still multiplied 3 160-4 846 fold. CNHK300 could cause about half of breast cancer cells to die within 7 days at MOI 10 pfu/cell and below, whereas the IC50 in BJ and MRC-5 was as high as MOI 100 pfu/cell. CNHK300 E1A protein could be detected in breast cancer cells and 293 cells but not in normal fibroblast cells. Conclusion： hTERT promoter can successfully modulate the CNHK300 to be selectively replicated in breast cancer cells positive for telomerase, which may be a potential treatment strategy in breast cancer.展开更多
Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control g...Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control group, 30 cases in each group. The patients in the treatment group were treated by acupuncture combined with electromagnetic therapy, while the patients in the control group were treated by Tamoxifen. After treatment, the serum estradiol （E2） and progesterone （P） levels were detected during luteal phase. Results： The total effective rate of the treatment group was 90.3%, while it was 93.3% in the control group, there was no statistical difference （P〉0.05）. The E2 levels decreased, and the P levels increased in the two groups. After treatment, the E2 and P levels were significantly different from those before in the two groups （P 〈 0.05）. And there was no statistical difference of the E2 and P levels between the two groups both before and after the treatments. Conclusion： Acupuncture combined with electromagnetic therapy can regulate the hypothalamic- pituitary-ovarian axis＇ function, and can repair normal process from hyperplasia to involution of the mammary glands. According to our study, the effect of acupuncture combine with electromagnetic therapy was almost the same with the western medicine.展开更多
基金This work was supported by International Cooperation Important Project of National Natural Sciences Foundation of China(No. 30120160824) and the State 863 High Technology R&D Project of China (No. 2001AA217031)
文摘Objective： To evaluate the tumor selectivity and therapeutic efficiency of replication-competent adenovirus CNHK300 on human breast cancer cells. Methods： RT-PCR was used to detect the hTERT mRNA activity in various breast cancer and normal fibroblast cell lines. Virus proliferation assay, cell viability assay and Western blot were applied to evaluate the proliferation and cytolysis selectivity of CNHK300. Results： The telomerase activity of MCF-7, BT-549 and SK-BR-3 was positive, while telomerase in MRC-5 and BJ was negative. The progeny virus titers in MCF-7, BT-549 and SK-BR-3 after 48 h of CNHK300 exposure was 40 625, 1 265 and 20 000 fold higher than those of 0 h, even slightly higher than those of wtAd5 （except in SK-BR-3）. ONYX-015 virus proliferation ability was weaker than that of CNHK300 in cancer cells. However, CNHK300 exhibited attenuated replicative ability as compared with wtAd5 in MRC-5 and BJ. The CNHK300 replicatative multiple was 63 and 192 fold at 48 h respectively, while the wtAd5 still multiplied 3 160-4 846 fold. CNHK300 could cause about half of breast cancer cells to die within 7 days at MOI 10 pfu/cell and below, whereas the IC50 in BJ and MRC-5 was as high as MOI 100 pfu/cell. CNHK300 E1A protein could be detected in breast cancer cells and 293 cells but not in normal fibroblast cells. Conclusion： hTERT promoter can successfully modulate the CNHK300 to be selectively replicated in breast cancer cells positive for telomerase, which may be a potential treatment strategy in breast cancer.
文摘Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control group, 30 cases in each group. The patients in the treatment group were treated by acupuncture combined with electromagnetic therapy, while the patients in the control group were treated by Tamoxifen. After treatment, the serum estradiol （E2） and progesterone （P） levels were detected during luteal phase. Results： The total effective rate of the treatment group was 90.3%, while it was 93.3% in the control group, there was no statistical difference （P〉0.05）. The E2 levels decreased, and the P levels increased in the two groups. After treatment, the E2 and P levels were significantly different from those before in the two groups （P 〈 0.05）. And there was no statistical difference of the E2 and P levels between the two groups both before and after the treatments. Conclusion： Acupuncture combined with electromagnetic therapy can regulate the hypothalamic- pituitary-ovarian axis＇ function, and can repair normal process from hyperplasia to involution of the mammary glands. According to our study, the effect of acupuncture combine with electromagnetic therapy was almost the same with the western medicine.
