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Objective To investigate the effect of high expression of protein tyrosine phosphatase SHP-1 on the tumor cell invasiveness and chemosensitivity of esophageal squamous cell carcinoma.Methods EC9706 ceils of esophageal squamous cell carcinoma were divided into three groups:the blank group was not given any treatment;the experimental group used SHP-1 mimic instantaneous vector to transfect cells for 24 h,and used 10 μmol/L cisplatin to treat EC9706 cells for 12 h;the control group selected 10 μmol/L cisplatin to treat EC9706 cells for 12 h.Cell proliferation was detected by using methyl thiazolyl tetrazolium (MTT) assay,and cell invasion was detected by using Transwell chamber.The expression of SHP-1 mRNA was detected by using fluorescence quantitative polymerase chain reaction.The expression level of SHP-1 protein was detected by using Western blot.Results The expression of SHP-1 mRNA in the experimental group (3.42t0.14) was higher than that in the control group and the blank group (1.09±0.13,0.42±0.24,F =9.143,P ＜ 0.05).Compared with the control group and the blank group,the cell growth inhibition rate and the apoptosis index in the experimental group were increased (both P ＜ 0.05),and the differences between any two groups were also statistically significant (all P ＜ 0.05).The cell invasion rate in the experimental group,the control group and the blank group was (6.5±1.3) ％,(18.5±2.5) ％ and (45.2±7.2) ％,respectively,and the difference was statistically significant (F =11.853,P ＜ 0.05).Conclusion High expression of SHP-1 can inhibit the invasion of esophageal squamous cell carcinoma,improve chemosensitivity,promote apoptosis and inhibit cell proliferation,which could lay a theoretical foundation for improving the efficacy of chemotherapy for esophageal squamous cell carcinoma.
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OBJECTIVE:To observe the short-term efficacy and toxicity reaction of 2 regimens of taxotere combined with epi-rubicin in the neoadjuvant chemotherapy of breast cancer. METHODS:78 patients with locally advanced breast cancer were random-ly divided into TEC group(45 cases)and TE group(33 cases). TEC group was treated with taxotere 75 mg/m2 by intravenous in-jection,d1+epirubicin 60 mg/m2 by intravenous injection,d1+cyclophosphamide 500 mg/m2 by intravenous injection d1. TE group was treated with taxotere 75 mg/m2 by intravenous injection,d1+epirubicin 60 mg/m2 by intravenous injection,d1. 21 days were a treatment course for 2 groups,and there were totally 4-6 courses. In the 2 groups,efficacy and toxicity reaction were evaluated af-ter 4 weeks at least,and survival rate of 6 months was followed-up. RESULTS:The differences were not statistically significant in the short-term efficacy and toxicity reaction and survival rate between 2 groups (P>0.05). CONCLUSIONS:TEC and TC have similar short-term efficacy and safety in the treatment of locally advanced breast cancer. Both of them can be used as adjuvant medi-cines for neoadjuvant chemotherapy.
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Objective To investigate the effect of co transfusion of bone marrow mesenchymal stem cells(BMMSC) on hematopoietic recovery in mice after allogeneic bone marrow transplantation(allo-BMT).Methods Both BMMSC obtained after three to four weeks of culture and bone marrow cells of donor mice C57BL/6(H-2~b) were transplanted into the recipient mice BalB/c(H-2~d) that were lethally irradiated.Peripheral blood cells were counted on day 1,7,and 14 post-transplantation.CFU-S in recipient bone marrows were measured on day 7 and 14.Results The numbers of peripheral WBC,RBC,platelets and the number of CFU-S in recipient bone marrows on day 7 and 14 were all significantly higher in the co-infusion group than those in control group(P
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Objective To observe the effect of bone marrow mesenchymal stem cells (BMMSC) on graft versus host disease (GVHD) and survival rate after allogenic bone marrow transplantation (allo-BMT) in acute lymphocytic leukemia (ALL) mice. Methods In the experimental group, both bone marrow cells and BMMSC obtained from donor mice were transplanted into the recipient mice injected with leukemia cells five days ago, and in the control group, the mice was injected with bone marrow cells alone. The impact of BMMSC on the quantity of CD 4 + and CD 8 + T cells after allo-BMT was evaluated by flow cytometry. The general manifestation and pathological changes of GVHD were observed. The survival time of recipient mice was recorded. Results BMMSC could decrease the quantity of CD 4 + T cells, increase CD 8 + T cells number, delay GVHD, and obviously increase the survival time in the mice treated with allo-BMT(P