Objective To observe the effect of calcitonin on senile osteoporosis. Methods Eighty-six osteoporotic patients diagnosed by double-energy X-ray absorptiometry and manifested clinical symptoms and with spinal bone mineral density (BMD) 2 or more were divided into two groups: 46 patients in the observed group were administered 100 IU calcitonin once a day for three days, and changed to 50IU calcitonin once every other day for one month; repeat the administeration method after one month rest and plus oral calcium carbonate vitamin D 600 mg every day for a period of 6 months; another 40 patients in the control group only took calcium carbonate vitamin D 600 mg every day for 6 months. The BMD of L1-4 and hips was examined before and after treatment. Results Bone pain relieving was more obviously in the observed group than that in the control group. BMD of the lumbar spine in the observed group showed remarkable change after treatment(P

Objective To study the hepatocyte cells infected by hepatitis C virus (HCV) positive serum. Methods Human hepatocyte 7701 was incubated with HCV RNA-positive and HCV antibody(Ab) negative sera BP52. Then, the expression of HCV antigen and the presence of HCV-RNA in cell and supernatant were assayed by RT-PCR, sequence analysis, immunofluorescent staining, Western blot, confocal laser microscopy. The ultrastructural changes of infected cells were observed by electro-microscopy. Results Plus-strand RNA and minus-strand RNA were intermittently detected in cell and/or supernatant on day 7-45 after infection. Sequence analysis demonstrated that the positive DNA nucleic acids were identified with HCV 5′-non-coding region(NCR) sequence. HCV core and NS3 protein were expressed in cytoplasm of infected cells. After 2 or 3 weeks, obvious intracellular ultrastructural changes and virus-like particles were observed. Conclusion human hepatocyte 7701 could support replication of HCV in vitro, which could be a useful tool for setting up cell model of HCV infection and studying the mechanism of HCV infection.

Objective:To investigate effects of capecitabine metronomic chemotherapy combined with exemestane on the proliferation of breast cancer MCF-7 cells and PI3-K/AKT signaling pathway.Methods:MCF-7 cells cultured in vitro were divided into the control group (adding DMEM without drugs), 30 μmol/L exemestane group, capecitabine metronomic chemotherapy combined drugs group [30 μmol/L exemestane combined with different concentrations (50, 33, 17 μmol/L) of capecitabine]. CCK-8 assay was used to detect the cell proliferation inhibition rate, the half-maximal inhibitory concentration ( IC50) was calculated, and the changes of cell cycle and apoptosis rate of MCF-7 in different drug groups were assessed by using flow cytometry. The related-protein expression of PI3K-AKT signaling pathway of MCF-7 cells was detected by using Western blot. Results:The IC50 of capecitabine and exemestane on MCF-7 cells for 72 h was 101.2 μmol/L and 60.6 μmol/L, respectively. The proliferation inhibition rate of MCF-7 cells in 30 μmol/L exemestane for 24 h and 48 h combined with 50, 33 and 17 μmol/L capecitabine group was higher than that in 30 μmol/L exemestane group (all P<0.01). The apoptosis rates were (18.1±2.6)%, (34.6±3.0)%, (27.6±1.3)%, (23.1±1.6)%, respectively in 30 μmol/L exemestane group, 30 μmol/L exemestane + 50 μmol/L capecitabine group, 30 μmol/L exemestane + 33 μmol/L capecitabine group, 30 μmol/L exemestane + 17 μmol/L capecitabine group, and the difference was statistically significant ( F = 23.652, P<0.01). Compared with the control group, the proportion of MCF-7 cells in phase G 2 of 30 μmol/L exemestane group was increased [(16.7±2.6)% vs. (10.6±2.2)%], while that in phase G 1 was decreased [(53.3±4.0)% vs. (56.3±3.2)%]. The proportion of MCF-7 cells in phase S of 30 μmol/L exemestane + 50 μmol/L capecitabine group was increased [(39.0±3.6)% vs. (33.1±2.0)%]. MCF-7 cells of 30 μmol/L of exemestane + 33 μmol/L capecitabine group were more blocked in phase S [(51.7±4.1)%], and cells in phase G 2 were nearly disappeared [(1.2±0.5)%]; the cell proportion MCF-7 cells in phase G 2 of 30 μmol/L exemestane plus 17 μmol/L capecitabine group was increased [(26.2±3.1)%]. Western blot analysis showed that low dose capecitabine metronomic chemotherapy promoted exemestane to inhibit the expression of PI3K, motivated AKT serine phosphorylated at protein 473 [the increased expression of p-AKT (473)], promoted S6 protein expression at downstream of signaling pathway and increased its phosphorylation level (the increased expression of p-S6), thereby activating apoptosis signal. Conclusion:Capecitabine metronomic chemotherapy combined with exemestane can synergistically inhibit the proliferation of breast cancer MCF-7 cells and activate apoptosis mechanisms of MCF-7 cells through affecting PI3K-AKT signaling pathway.

Objective To study the characteristics of bone marrow hematopoietic recovery such as absolute neutrophil count (ANC) and platelet (PLT ) after accepting hematopoietic stem cell transplantation in the patients with inv (9) .Methods A total of 39589 cases of definitely diagnosed hematonosis in our hospital from January 2010 to October 2015 served as the research subjects . The R banding technique ,polymerase chain reaction(PCR) and flow cytometry instrument were adopted to check chromosome karyotype ,fusion gene and bone marrow hematopoietic recovery related indicators .Results PML-RARα,BCR-ABL1 ,AML-ETO , EVI1 ,CBFβ-MYH11 ,MLL-AF6 ,AML-AF4 ,SET-NUM214 ,SIL-TALI ,IgH rearrangement ,TCR rearrangement and BCL1-IgH and other fusion gene were detected in the patients with inv (9) hematonosis .The recovery situation after receiving hematopoietic stem cell transplantation in the patients with inv (9):ANC recovered to ＞0 .5 × 109/L on 12 d after transplantation ,PLT recovered to ＞20 × 109/L on 16 d after transplantation .The recovery situation after receiving hematopoietic stem cell transplantation in the patients with noninv(9):ANC recovered to ＞0 .5 × 109/L on 12 d after transplantation ,and PLT recovered to ＞20 × 109/L on 13 d after transplantation .Conclusion The time achieving ANC recovery ＞0 .5 × 109/L after hematopoietic stem cell transplantation in the patients with inv(9) and without inv(9) is almost similar ,while the time achieving PLT count recovery in the patients with inv(9) is slightly longer than that in the patients without inv(9) .