Construction of human telomerase reverse transcriptase periodontal ligament cell line mediated by adenovirus / 华西口腔医学杂志

OBJECTIVE@#This study aims to establish an effective and stable periodontal ligament cell line stably expressing human telomerase reverse transcriptase (hTERT) gene by using the adenovirus method.@*METHODS@#Polymerase chain reaction (PCR) was used to amplify the full length of hTERT gene to construct recombinant adenovirus plasmid pAd-pshuttle-cmv-hTERT. Packaged adenovirus particles were used for infection of human periodontal ligament cells. The expression levels of hTERT and osteogenic genes, such as alkaline phosphatase, Runt-related transcription factor 2, bone sialoprotein, osteocalcin, osteopontin, and collagen Ⅰ mRNA, were detected by quantitative real-time PCR (qRT-PCR). The ability of osteogenic differentiation was observed by alizarin red staining, and the cell proliferation was determined by CCK-8.@*RESULTS@#Adenovirus particles containing the hTERT gene were successfully constructed and infected with periodontal ligament cells. The infected cells were similar to normal periodontal ligament cells. The qRT-PCR results showed that hTERT and osteogenesis-associated genes were highly expressed in the periodontal ligament cell lines constructed by adenoviruses. Alizarin red staining showed that the periodontal ligament cell line had strong osteogenic differentiation capability. CCK-8 showed that the periodontal ligament cell line had strong proliferation capability.@*CONCLUSIONS@#The human periodontal ligament cell line with high efficiency and stable expression of hTERT was established by the adenovirus method, thereby providing an ideal cell line for studying the mechanism of periodontal regeneration.

Progression in the diagnosis and treatment of Bile acid diarrhea / 医学研究生学报

Bile-acid diarrhoea(BAD)is a common cause of chronic diarrhoea,resulting from the excess amounts of bile acids enter the colon.The understanding of people about the cause of this diarrhea is still relatively limited for a variety of reasons.Clin-ically,75SeHCAT is the first-line diagnostic test,Other diagnostic tests including the measurement of serum 7α-hydroxy-4-cholesten-3-one(C4)、serum fibroblast growth factor 19(FGF19)、fecal bile acids and the empirical treatment of bile acid sequestrants(BAS). First-line treatment is with BAS for BAD,primarily cholestyramine,Newer BAS such as colestipol and colesevelam have fewer side effects. Obeticholic acid(OCA),as a new drug,maybe have a significant future.This article gives an overview on the etiology,pathogen-esis、diagnosis and treatment progress of BAD.