OBJECTIVETo investigate the mechanism of Yanshu Injection (YI) for overcoming multidrug resistance in breast carcinoma MCF-7 cells.

METHODSHuman breast carcinoma MCF-7 cells and doxorubicin-resistant MCF-7/DOX cells were treated with YI. Its inhibition on the cell proliferation was detected by MTT assay. The fluorescence intensity of doxorubicin was detected by flow cytometry. The expression of apoptosis related protein and P-glycoprotein were examined by immunoblotting after treated by YI.

RESULTSThe inhibitory action of YI on MCF-7/DOX cells was similar to that of MCF-7 cells, indicating no cross resistance (P > 0.05). 1/16 YI could obviously induce the apoptosis of MCF-7 cells and DOX cells. 1/256 YI +5 nmol/L doxorubicin and 1/128 YI +5 nmol/L doxorubicin could reduce the survival rate of MCF-7/ DOX resistant cells from 86.8% to 74.6% (P < 0.05) and 71.6% (P < 0.01) respectively, showing obvious synergistic effect. Besides, the accumulation of doxorubicin was increased after treated by YI in the MCF-7/ DOX cells. Results of immunoblotting indicated that reduction of P-glycoprotein expression was detected in MCF-7/DOX cells after exposure to YI.

CONCLUSIONYI could overcome the multidrug resistance in breast carcinoma MCF-7 cells possibly through reducing the expression of P-glycoprotein.

Apoptosis ; drug effects ; Cell Proliferation ; drug effects ; Drug Resistance, Multiple ; drug effects ; Drug Resistance, Neoplasm ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Female ; Humans ; MCF-7 Cells

Objective: To study the effect of free radical injury induced by Soman in rats and protection by Se/Zn. [WT5FZ]Methods: [WT5BZ]40 male rats were randomly divided into 4 groups, i.e., negative group, positive group, Se group and Zn group according to weights. The serum, cerebrum and liver VE content, nitrogen oxide synthase (NOS activity and T AOC (total antioxidative capacity) were determined. Results: The VE content and T AOC decreased markedly, and NOS activities increased significantly after Soman intoxication. The changes were less significant in Se/Zn supplemented group. Conclusion: The mechanism of free radical injury is indicated in Soman intoxication and Se/Zn supplementation has significant protection.

Objective To explore the pathogenic bacteria′s distribution and their drug resistance of urinary tract infection in children.Methods A total of 555 pathogen strains in urinary tract infection for children from inpatients and outpatients from Jan.2005 to Dec 2006 were identified and the drug resistance test was preformed.Results In the 555 strains of bacteria,80.7% were Gram-negative,17.7%were Gram-positive and 1.6%were fungi.Most of Gram-negative bacteria were E.coli,among 300 strains of identified Escherichia,69.3% of them(208 strains) produced extended speetrum ? lactamases(ESBLs);among 41 strains of identified Klebsiella pneumoniae,78.1% of them(32 strains) produced ESBLs.Most of Gram-positive bacteria were Enterococcus,there were 70 strains(12.6%),sensitivity rates of nitrofurantion and vancomycin were 100%.Conclusion Gram-negative is the main infection bacterium in urinary tract infection for children and the most of them are very serious drug resistant.The clinicians should pay more attentions to idstream urin bacteriology culture and choose the suitable antibiotic according to the results of antibiotic susceptibility tests.

OBJECTIVETo Understand the characteristics of the common complications in the gastric malignant tumor inpatients in our country, the related traditional Chinese and western medicine combined usage.

METHODBy using the method of frequency analysis and correlation, analysis the diagnostic and Prescribing information in HIS database of 20 national first-class ternary general hospital inpatients.

RESULTThe most common coexistent disease are malignant tumor in other parts, benign tumor. The most common complications are serous cavity effusion, lung infection, abnormal liver function. In other parts malignant tumor, more than 50% with advanced gastric malignancy; in other parts benign tumor, 86.00% located in the digestive and Urinary system, in the complications, digestive system diseases accounted for 23.80%; further according to the association rules of data mining, and calculate the combination scheme of the most commonly used for acid suppression drugs in combination with the centralizer and eliminate pathogenic traditional Chinese medicine (TCM).

CONCLUSIONIn the real world, most of the gastric malignant tumor disorder crowd is in the advanced stage, with lymph nodes and other parts of the transfer; and at the same time to incorporate the spleen and kidney disease in TCM zang-fu organs dialectical, should notice the reach mark early intervention, achieve the purpose of cure not ill; acid suppression hemostatic drugs combined the centralizer and eliminate pathogenic the three medicine combined treatment of Chinese traditional medicine is relevant.

Asian Continental Ancestry Group ; Female ; Humans ; Inpatients ; Male ; Medicine, Chinese Traditional ; methods ; Stomach Neoplasms ; diagnosis ; drug therapy

Objective To investigate the effect of cyclosporine A(CsA)on viral protein syn- thesis and hepatitis B virus(HBV)DNA replication in vitro.Methods The HBV DNA transfected cell line HepG2.2.15 was treated with different concentration of CsA(0.6-20.0?g/ml)for 4 days. Hepatitis B surface antigen(HBsAg)and hepatitis B e antigen(HBeAg)in supernatant were detected by enzyme-linked immunosorbentassay(ELISA);intracellular hepatitis B core antigen(HBcAg)mR- NA and HBV DNA were analyzed by RT-PCR and slot blot hybridization,respectively;the phospho- rylation at tyrosine acid position 402 of PyK2 kinase(PyK2 Y402)was detected by Western blot.Re- sults CsA could suppress the expression of HBsAg and HBeAg,and inhibit the HBV DNA replica- tion in a dose-dependent manner.The suppression rate of HBsAg and HBeAg under the action of CsA at the concentration of 10.0?g/ml for 4 days was 49.7% and 34.3%,respective;similar effect was observed on HBV DNA replication,HBV DNA was only 34.9% of the control at the concentration of 10.0?g/ml of CsA.The phosphorylation level of PyK2 Y402 was declined under the action of CsA at the concentration of 2.0?g/ml.Conclusions CsA can inhibit the expression of HBsAg,HBeAg and HBV DNA replication in the HepG2.2.15 cell line in a dose-dependent manner.Suppression of the phosphorylation level of PyK2 Y402 maybe involved in the mechanism of the inhibitory activity of CsA on HBV replication.

Diagnostic Errors ; Encephalocele ; diagnosis ; Female ; Humans ; Meningocele ; diagnosis ; Middle Aged ; Mucocele ; diagnosis ; Sphenoid Sinus ; pathology

Objective To investigate effect of alendronate on prevention of aseptic loosening prothesis.Method Twelve beagles which had been implanted a titanium plug in femur were divided into two groups randomly,one received alendronate,and the other placebo as control.After 12 weeks,all beagles were sacrificed.specimens of femur were studied by biomechanical test.Independent sample t test was used for statistical analyses.Results The pull-out strength of the experimental group was higher than that of the control (P ＜ 0.05),and the torsion strength was also higher in the experimental group(P ＜ 0.05).Conclusion The therapy of alendronate can change the bone strength,inhibit aseptic loosening of prosthesis in beagle and could be a good drug for the prevention and treatment of aseptic loosening prothesis.

Objective To investigate the prevalence features of helicobacter pylori (Hp) infection,anemia and iron deficiency in a po-pulation of Wuhan children with 2 to 6 years old,and the relationship between Hp infection and anemia,iron deficiency in the children.Methods Randomly taking 95 children who had taken tests in our hospital's check-up centre in 2008 as the study objects,2 kinds of exa-mination were employed to detect Hp infection.Serum levels of Hp-IgG were measured by enzyme linked immunosorbent assay (ELISA) methods to evaluate past infection.The 14C urea breath test (14C-UBT) was conducted to obtain information of the presence of current/active Hp infection.In the morning 3 mL fasting venous blood was collected to determine the serum levels of Hp-IgG antibodies and ferritin.Hemoglobin values were determined with a hemoglobinometer.Serum levels of C-reactive protein (CRP) were tested in order to determine whether the children had evidence of current inflammation or infection.In addition,demographic information such as age and gender of the children and information about their use of antibiotics within the prior month were recorded.All cases were divided into 2 groups including the Hp infection group and non-Hp infection group according to laboratory examinations,then the Logistic regression was applied to analyze the relationship between Hp infection and anemia,iron deficiency.The Kappa identity test was taked to compare the 2 measures.Results Of the 95 children,18.9% were anemic and 36.8% were iron deficient.Forty percent of the cohort had Hp-IgG antibodies,74.4% tested positive by the UBT.Presence of Hp-IgG emerged as a significant risk factor for anemia,iron deficiency in adjusted analysis controlling for demographic factors,current inflammation,and antibiotic use.Conclusions Findings from different measure of Hp may reflect different stages of infection,with UBT results reflecting an earlier stage of infection,and presence of Hp-IgG reflecting established Hp infection associated with anemia,iron deficiency.

Objective To explore the best serum-free cultural way in neural stem cells from the hippocampus of the newborn rats and observe the characteristics of growth,proliferation,and induced differentiation of neural stem cells.Methods The neonatal rats′ hippocampus tissues were dissociated mechanically.The cells were cultured in the serum-free cultural medium which were added separately basic fibroblast growth factor(bFGF),epithelium growth factor(EGF),bFGF+EGF by suspended cultural way.The neural stem cells were identified by nestin immunofluorescence.After induced differentiation of embryonic cow serum,the differentiated cells were identified.Results The serum-free medium added bFGF and EGF could perfectly induce neural stem cells to proliferate and the differentiated cells expressed the specific antigen of neurons,astrocytes and oligodendrocytes.Conclusion The serum-free medium with bFGF and EGF can be used to culture neural stem cells from hippocampus tissue of rats in vitro.

OBJECTIVETo observe protective effects of Schisandra extract (SE) on embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene (Bap).

METHODSPregnant rat model was prepared using periodic screening cage method. Totally 50 female pregnant SD rats were divided into five groups by randomized block design according to the weight, i.e., the BaP model group, the low dose SE group, the middle dose SE group, the high dose SE group, the normal control group, 10 rats in each group. Rats in the BaP model group were administered with BaP at a daily dose of 2 mg/kg by gastrogavage. Rats in low, middle, and high dose SE groups were administered by gastrogavage with BaP (at a daily dose of 2 mg/kg) plus SE at a daily dose of 40, 200, and 1 000 mg/kg, respectively. Equal volume of olive oil was administered to rats in the normal control group by gastrogavage. All medication was performed for 8 successive days. Changes of rat body weight in each period were observed. The uterus embryonic total quality and ovary quality were measured, and organ index calculated. The number of corpus luteum, the number of embryo implantation, and the number of absorbed embryo were statistically calculated respectively. The implantation rate and the absorbed embryos rate were calculated. Serum levels of human chorionic gonadotrophin β (β-HCG) and progesterone (PROG) were detected by ELISA.

RESULTSCompared with the normal control group, the weight of 9-day pregnant rats, the number of embryo implantation, the uterus embryonic total index, ovary index, serum levels of β-HCG and PROG all decreased in the Bap model group with significant difference (P < 0.05, P < 0.01). Compared with the Bap model group, body weight, the uterus embryonic total index, and the PROG level increased in 3 dose SE groups (P < 0.05, P < 0.01). Ovary index and serum β-HCG increased in middle and high dose SE groups (P < 0.05, P < 0.01). The number of implantation obviously increased in the high dose SE groups (P < 0.01).

CONCLUSIONSE could reduce the embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene.

Animals ; Benzo(a)pyrene ; toxicity ; Chorionic Gonadotropin ; blood ; Embryo Implantation ; drug effects ; Female ; Ovary ; drug effects ; Plant Extracts ; pharmacology ; Pregnancy ; Progesterone ; blood ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reproduction ; drug effects ; Schisandra ; chemistry ; Uterus ; drug effects