Construction and co-expression of bicistronic plasmid encoding human WEE1 and stem cell factor.

To protect the hematopoietic stem cells (HSCs) from apoptosis induced by chemotherapy and promote HSC proliferation, bi-functional gene delivery systems are increasingly investigated in gene therapy. In the present study, we constructed a bicistronic vector, pWISG, expressing the anti-apoptotic protein human WEE1 (WEE1Hu) and the fusion protein of the proliferation-stimulating stem cell factor (SCF) and enhanced green fluorescent protein (EGFP) separately with internal ribosome entry site (IRES). We first examined the expression and location of WEE1Hu in Chinese hamster ovary (CHO) cells and showed that WEE1Hu was located in the nucleus, which was confirmed by immunohistochemistry and Western blot.

[HDAC1 expression and effect of TSA on proliferation and apoptosis of A549 cells].

Background & Objective: Histone deacetylase (HDAC) shows a high expression in many cancer cells and the inhibitor of HDAC1, trichostatin A (TSA), can inhibit the growth of cancer cells. Hypoxia is a common feature of malignant tumors. This paper was designed to investigate the expression of HDAC1 of A549 cell strains in hypoxia condition and the effect of TSA on their proliferation and apoptosis.

[Survivin antisense RNA enhances taxol-induced apoptosis in leukemia cell line HL-60].

Objective: To explore the effects of survivin antisense RNA on taxol-induced apoptosis in leukemia cell line HL-60.

Methods: A survivin antisense eukaryotic vector pcDNA3-SVVas was transferred into HL-60 cells by electroporation. The live fraction was determined by trypan blue dye exclusion assay.