Bumetanide inhibits tumor-cell proliferation by down-regulating NKCC1 expression / 军事医学

Objective To explore the application of bumetanide to inhibition of tumor cell proliferation.Methods In different cell lines, the expression of natrium,kalium, chloride cotransporter 1 ( NKCC1) was detected by Western blotting while the proliferation of different tumor cells was examined by CCK-8 kit.Results The target protein NKCC1 expression in lung cancer cell line ( A549 ) and colorectal cancer cell line ( HCT116 ) was significantly higher than that in chronic myelogenous leukemia cell line (K562), esophageal cancer cell line (Eca109), cervical carcinoma cell line (HeLa), T lymphocytic leukemia cell line (Jurkat) and breast cancer cell line (MCF7).IC50 Values of bumetanide were significantly lower in A549 and HCT116 than in K562, Eca109,HeLa,Jurkat and MCF7.Furthermore, the inhibiory rate and the target protein expression level were positively correlated.Conclusion Bumetanide can inhibit tumor cell proliferation and NKCC1 can serve as a potential target of anticancer drugs.

Primary Safety Assessment of EPO Gene Therapy / 中国肿瘤生物治疗杂志

The safety of hEPO gene therapy was assessed. No env gene of retrovirus was detected in the EPO-transgenic myoblasts and fibroblasts by PCR detection. Malignant transformation of transgenic cells was ruled out by various examinations including cell morphology, chromosome karyotype, soft-agar test, nude mice test and pathology. All the assessments primarily demonstrated that EPO gene therapy mediated by retrovirus was safe.

A novel cDNA clone related with rat liver regeneration / 中国病理生理杂志

AIM: To study a novel gene that probably related with liver regeneration, which was found by representational difference analysis(RDA). METHODS: cDNA sequence, tissue distribution and functions of the novel gene were studied by slot blot, Northern blot, RT-PCR, cDNA library screening and sequence analyzing. RESULTS: Two full-length clones were isolated from cDNA library of rat fetal livers and the sequence analysis identified that the positive cDNA encoded 76 amino acids only; Using the cDNA as a probe, the novel gene showed a specific liver distribution, a moment increasing expression in one hour after partial hepatectomy (PH) and high expression in fetal liver or liver tumor by Northern blot; EGF quickly induced its high expression in primary culture rat hepatocytes(FCS free).CONCLUSION: These results show that the novel gene is an early phase response gene that is closely related to a liver regeneration adjustment. It may encode peptide or has longer sequence at N tip.