Decursin affects proliferation, apoptosis, and migration of colorectal cancer cells through PI3K/Akt signaling pathway / 中国中药杂志

We investigated the effects of decursin on the proliferation, apoptosis, and migration of colorectal cancer HT29 and HCT116 cells through the phosphatidylinositol 3-kinase(PI3K)/serine-threonine kinase(Akt) pathway. Decursin(10, 30, 60, and 90 μmol·L~(-1)) was used to treat HT29 and HCT116 cells. The survival, colony formation ability, proliferation, apoptosis, wound hea-ling area, and migration of the HT29 and HCT116 cells exposed to decursin were examined by cell counting kit-8(CCK8), cloning formation experiments, Ki67 immunofluorescence staining, flow cytometry, wound healing assay, and Transwell assay, respectively. Western blot was employed to determine the expression levels of epithelial cadherin(E-cadherin), neural cadherin(N-cadherin), vimentin, B-cell lymphoma/leukemia-2(Bcl-2), Bcl-2-associated X protein(Bax), tumor suppressor protein p53, PI3K, and Akt. Compared with the control group, decursin significantly inhibited the proliferation and colony number and promoted the apoptosis of HT29 and HCT116 cells, and it significantly down-regulated the expression of Bcl-2 and up-regulated the expression of Bax. Decursin inhibited the wound healing and migration of the cells, significantly down-regulated the expression of N-cadherin and vimentin, and up-regulated the expression of E-cadherin. In addition, it significantly down-regulated the expression of PI3K and Akt and up-regulated that of p53. In summary, decursin may regulate epithelial-mesenchymal transition(EMT) via the PI3K/Akt signaling pathway, thereby affecting the proliferation, apoptosis, and migration of colorectal cancer cells.

Prevalence rates of healthcare-associated infection and community-associated infection in hospitalized patients in 253 hospitals of Hebei Province / 中国感染控制杂志

Objective To investigate prevalence of healthcare-associated infection(HAI) and community associated infection(CAD in hospitalized patients in Hebei Province.Methods A certain day from August 17 to August 28,2015 was selected as the survey day,unified questionnaires were formulated,the prevalence of HAI and CAI in hospitalized patients in secondary and above comprehensive hospitals in Hebei Province was surveyed,pathogens causing infection were analyzed and compared.Results A total of 65 065 patients in 253 hospitals were surveyed,prevalence rates of HAI and CAI were 2.89％ and 16.84％ respectively.The top three sites of HAI were respiratory tract(61.32％),urinary tract(12.49％),and surgical site(9.83％),the top three sites of CAI were respiratory tract (56.70％),urinary tract(10.89％),and gastrointestinal tract(8.35％).Distribution of sites of HAI and CAI was significantly different(P＜0.01).The top 5 pathogens were of the same species,but ranked differently,the main bacteria causing HAI was Pseudomonas aeruginosa (22.69％),CAI was Escherichia coli (23.79％).There was significant difference in the distribution of pathogens between HAI and CAI (P＜0.01).There were significant differences in pathogenic species causing respiratory tract,gastrointestinal tract,urinary tract,and intra abdominal infection(all P＜0.05).Isolation rates of extended spectrum β-lactamase-producing/carbapenem-resistant Klebsiella pneumoniae,methicillin-resistant Staphylococcus aureus between HAI and CAI were all significantly different(all P ＜0.001).Conclusion Incidence of infection,infection sites,as well as constituent of pathogens and multidrugresistant organisms between HAI and CAI are varied,besides monitoring on HAI,monitoring on drug resistance of pathogens causing CAI should be paid attention,so as to provide scientific basis for rational antimicrobial use in clinical practice.