Acetamides ; pharmacology ; Animals ; Bridged-Ring Compounds ; poisoning ; Disease Models, Animal ; Female ; Male ; Rats ; Rats, Sprague-Dawley ; Troponin I ; blood

Aim To investigate the effects of diallyl di-sulfide( DADS) on G2/M arrest in Chk1/MGC803 and Chk2/MGC803 cells so as to establish stable human gastric cancer MGC803 cells with overexpression of Chk1/2 gene. Methods The colony formation, flow cytometry, RT-PCR and Western blot were used to de-tect the proliferation, cell cycle, and expression of Chk1/2 mRNA and protein, p-Chk1/2, CDC25C and cyclinB1, respectively. Results The colony formation showed that the colony forming efficiency in Chk1/MGC803 and Chk2/MGC803 cells treated by 30 mg· L-1 DADS was lower than in control group and vector group ( P <0. 05 ) . Flow cytometry demonstrated that 41. 3%, 57. 4%, 68. 9% and 42. 9% of G2/M cells in Chk1/MGC803 were increased than in MGC803 and Chk2/MGC803 , respectively after treated by DADS in 12,24, 36 and 48 h(P <0. 05). At the same time, RT-PCR disclosed that expression of Chk1 and Chk2 mRNA had no marked change. Western blot showed that total proteins of Chk1 and Chk2 and p-Chk2 had invisible change, but expression of p-Chk1 was up-reg-ulated, and CDC25C and cyclinB1 were down-regula-ted time-dependently in Chk1/MGC803 cells ( P <0. 05 ) . Conclusion DADS arrests MGC803 cells at G2/M by increasing p-Chk1 expression to cause down-regulation of CDC25C and cyclinB1 simultaneously.

Objective:This work aims to investigate diallyl disulfide (DADS) inhibition of cell migration and invasion in human colon cancer SW480 cells through the Rac1-ADF/cofilin1 pathway. Methods:The potential of cell migration and invasion was examined by scratch healing assay and transwell membrane assay. The expression of Rac1-ADF/cofilin1 pathway was detected by RT-PCR and Western blot. Results:After the SW480 cells were treated with 40 and 50 mg·L-1 of DADS for 24 h, the number of transmembrane cells through the Matrigel obviously decreased by 57.12%and 64.59%, respectively (P<0.05). After cell treatment for 48 h, the cell migration rates were 23.23%and 12.87%, which were significantly lower compared with the control group (75.86%;P<0.05). After the cells were treated with 45 mg·L-1 of DADS for 24 and 48 h, the expression of Rac1, Rock1, PAK1, LIMK1, and destrin mRNA respectively decreased compared with the control group (P<0.05). However, no significant difference was observed in the expression of cofilin1 mRNA (P>0.05). After the treatment with 45 mg·L-1 of DADS for 6, 12, 24, and 48 h, the expression of Rac1, Rock1, PAK1, LIMK1, and Destrin proteins respectively decreased in a time-dependent manner compared with the control group (P<0.05). However, no significant differences were observed in the expression of the cofilin1 protein (P>0.05). Moreover, the expression of p-LIMK1 and p-cofilin1 notably decreased in a time-dependent manner (P<0.05). Conclusion:DADS inhibits cell migration and invasion, which is related to the down-regulation of Rac1, Rock1, PAK1, LIMK1, p-LIMK1, p-cofilin1, and destrin through the Rac1-ADF/cofilin1 pathway.

Carcinoma, Squamous Cell ; genetics ; pathology ; virology ; Cervical Intraepithelial Neoplasia ; genetics ; pathology ; virology ; DNA, Viral ; metabolism ; Female ; Gene Amplification ; Humans ; In Situ Hybridization, Fluorescence ; Lymphatic Metastasis ; Neoplasm Grading ; Neoplasm Staging ; Papillomaviridae ; genetics ; Papillomavirus Infections ; metabolism ; RNA ; genetics ; Telomerase ; genetics ; Uterine Cervical Neoplasms ; genetics ; pathology ; virology

Objective To explore the role and clinical significance of interleukin-6(IL-6) in children with bronchial asthma.Methods Sera were collected from 29 cases with asthmatic attacks,32 asthmatic children who in stable conditions,and 20 health children.Serum IL-6 concentrations were measured by radioimmunoassay(RIA).Results 1.Asthmatic children appeared significantly higher levels of serum IL-6 during asthmatic attacks as compared to those in stable conditions and healthy ones respectively(P3 years old had significantly higher serum IL6 concentrations than ≤3 years old children in remission.Conclusion IL-6 may participate pathogenesis of asthma,and it may play different biological roles during asthmatic attacksas or stable conditions.

Objective To investigate the extraction method of total flavonoids from the leaves of ficus lacor and the protec tive effects of extraction on the cellular damage to provide a basis for the research on the phamaceutical value of ficus lacor leaves.Methods The ethanol extraction method was adopted to extract the total flavonoids in the leaves of ficus lacor and the extraction efficiency was calculated with rutin as the standard.The rotenone induced human lung adenocarcinoma cellular damage served as the model,then the influencesof the extraction on the cellular viability,cellular morphology,production of reactive oxygen species (ROS) and apoptosis were researched.Results The extraction efficiency of total flavonoids in the leaves of ficus lacor by 60％ ethanol was 5.02％;the extraction at the concentration of 32 mg/L could significantly inhibit the decrease of cell viability,cellular shape change,ROS production and apoptosis of A549 cells induced by 100μg/L rotenone.Conclusion The ethanol extraction method can be used to extract the total flavonoids in the leaves of ficus lacor and the extraction has the protective effects on the A549 cellular dam age induced by rotenone,the leaves of ficus lacor have the potential for further researching its pharmaceutical value.

To look for a more stable and convenient way of constructing short hairpin RNA expression vectors targeting the latent membrane protein-1(LMP-1) encoded by Epstein-Barr virus(pshLMP1), and to study the inhibition function of pshLMP1 expression vectors in HNE1 cells, we designed the pshLMP1 expression cassette and pshLMP1 expression vectors by both the annealing method and PCR method and then co-transfected with pEGFP-N1-1158 into HNE1 cells to observe the mRNA and protein levels of LMP-1 genes by green fluorescence analysis, RT-PCR and western blot. pshLMP1 expression vectors were successfully obtained by both methods but better cloning efficiency was achieved and fewer deletions and mutations of nucleotides were achieved with the PCR method. Furthermore, the mRNA and protein levels of LMP-1 genes were down-regulated by pshLMP1 expression vectors. According to our research, we found that the PCR method provides a more efficient way to construct pshLMP1 expression vectors which have the ability to inhibit the function of LMP-1 genes expressed in HNE1 cells, and also provides a novel application of RNA interference technology against-EBV.

Objective　To investigate the relationship between allergic reaction and fungus sensitinogen in patients with chronic colitis. Methods　Skin test with 3 groups of fungus allergen (6 types), eosinophil detection in serum and intestinal secretion and serum specific IgE (SIgE) test were tested in 246 patients with chronic colitis. The other 61 patients with chronic diarrhea were served as control. Results　Fungus positive was found in 110 patients (43.09%) in dermal fungus allergen test, but only 8.20% in control (P<0.01). In patients with chronic colitis, the positive rates of eosinophil in intestinal secretion and specific IgE induced by fungus allergen were 29.35% and 41.60% respectively. Conclusion　It is indicated that some patients with chronic colitis have correlation with allergic reaction of digestive system induced by food with fungus allergen.

Objective　To study the corelation between patient with inflammatory polyp of large intestine and the changes of immunologic function. Methods　Polyps of large intestine were extirpated from 120 patients with fiberoptic colonoscope and the pathological changes were studies. IgG subclass and T cell subsets in the peripheral blood were determined by ELISA and IFA methods. Similar parameters were determined in 30 cases of chronic colitis as control. Results　CD8 in patients were lower than that of the control and CD4/CD8 were increased compared with those in control. Conclusion　Disorder of humoral and cellular immunity might play an important role on the pathogenesis of polyp of large intestine.

Objective To investigate the prevalence of clonorchiasis among residents of Huachuan Country,Heilongjiang Province and to provide a basis for development of control strategies.Methods From 2011 to 2012,cluster random sampling was performed to survey the incidence of clonorchiasis in Huachuan Country.Fecal specimens were collected and examined the clonorchis sinensis eggs by Kato-Katz method.A questionnaire survey was conducted to collect related information such as age,gender,occupation and eating habits.The infection characteristic was analyzed.Results Totally 884 patients with clonorchiasis were found among 2248 residents,and the infection rate was 39.32％.The infection rate in male[47.15％(611/1296)] was significantly higher than females [28.68％(273/952),x2 =34.55,P ＜ 0.01].The infection rate increased with age,which was higher in the 20-69 years old people,with the highest infection rate in the 50-59 years old groups[45.34％ (219/483)].Of the occupational distribution,farmers had the highest infection rate [47.24％ (420/889)],followed by cadres and staffs[38.38％(190/495)].Of residents with fresh fish eating history,the prevalence of clonorchiasis was 53.38％(150/281).Conclusions The prevalence of clonorchiasis is still high in Huachuan County.To reduce the prevalence of clonorchiasis,comprehensive prevention measures,health education and group chemotherapy should be carried out.