Type 1 diabetes mellitus(T1DM)is a specific autoimmune disease.In addition to traditional exogenous insulin supplementation therapy,immunomodulators and cell therapy methods have received attention.The Janus tyrosine protein kinase/signal transduction and transcription activating factor(JAK/STAT)pathway is widely present in cells,maymediate various cytokine signaling pathways and participate in islets β cell autoimmune destruction in T1DM.This article reviews the research progress on the correlation between the JAK/STAT pathway and T1DM.

Type 1 diabetes mellitus(T1DM)is a specific autoimmune disease.In addition to traditional exogenous insulin supplementation therapy,immunomodulators and cell therapy methods have received attention.The Janus tyrosine protein kinase/signal transduction and transcription activating factor(JAK/STAT)pathway is widely present in cells,maymediate various cytokine signaling pathways and participate in islets β cell autoimmune destruction in T1DM.This article reviews the research progress on the correlation between the JAK/STAT pathway and T1DM.

The ORF sequence of glycosyltransferase gene BcUGT1 cloned from Bupleurum chinense DC. was analyzed and its three dimentional structure was predicted. Using qRT-PCR method, the expression characteristics of BcUGT1 after methyl jasmonate (MeJA) induction and in different plant tissues were investigated. The results showed that BcUGT1 may be involved in saikosaponin biosynthesis in B. chinense. Thereafter, the recombinant vectors of BcUGT1 were constructed for its expression in E. coli. The target protein was successfully expressed and purified. In the present study, three vectors, pRSET-A, pET-28a (+) and pET-30a (+), and three isolates of E. coli, BL21 (DE3) plysS, BL21A1 and BL21-CodonPlus (DE3)-RIPL were used under different induction conditions, such as different concentrations and during times of inducers (L-arabinose and IPTG) and different inducing temperatures. The results showed that in the condition of 0.5 or 1 mmol x L(-1) IPTG, 16 degrees C, 20 h, target protein expressed in BL21-CodonPlus (DE3)-RIPL with pET-28a (+) or pET-30a (+) as vector. Using PrepEase His-tagged protein purification kit, the target protein was purified. The present work will be helpful for follow-up bio-function analysis of BcUGT1.