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Articles by Haixia Wang
Total Records ( 2 ) for Haixia Wang
  Jian Tu , Kezong Qi , Xiuheng Xue , Haixia Wang , Xueyan Wang , Kaisong Peng , Lingling Xie and Yanli Wu
  Avian β-Defensin-2 (AvBD2) is an antimicrobial peptide that plays a significant role in the innate immunity of chickens. In this research, the expression vector pPIC9K-AvBD2 was established and expressed in Pichia pastoris. AvBD2 cDNA was cloned from total RNA of chicken lung by Transcriptase-Polymerase Chain Reaction (RT-PCR). The AvBD2 mature peptide gene was amplified from and cloned into a pPIC9K plasmid. Then the recombinant expression vector pPIC9K-AvBD2 was transformed into P. pastoris GS115 to express the fusion protein. The result showed that a recombinant secretion expression vector pPIC9K-AvBD2 was successfully constructed and a fusion protein about 3.9 kDa chicken AvBD2 was expressed. Densitometric scanning analysis demonstrated that the expressed protein exaccounted for about 63.7% of the total secreted bacterial protein. The expression products had antimicrobial activity to Escherichia coli and Staphylococcus aureus in the Assay of Agar Diffusion Method.
  Kepeng Wang , Chihao Wang , Fang Xiao , Haixia Wang and Zhenguo Wu
  Skeletal muscle satellite cell-derived myoblasts are mainly responsible for postnatal muscle growth and injury-induced regeneration. However, the cellular signaling pathways that control proliferation and differentiation of myoblasts remain poorly defined. Recently, we found that JAK1/STAT1/STAT3 not only participate in myoblast proliferation but also actively prevent them from premature differentiation. Unexpectedly, we found that a related pathway consisting of JAK2, STAT2, and STAT3 is required for early myogenic differentiation. Interference of this pathway by either a small molecule inhibitor or small interfering RNA inhibits myogenic differentiation. Consistently, all three molecules are activated upon differentiation. The pro-differentiation effect of JAK2/STAT2/STAT3 is partially mediated by MyoD and MEF2. Interestingly, the expression of the IGF2 gene and the HGF gene is also regulated by JAK2/STAT2/STAT3, suggesting that this pathway could also promote differentiation by regulating signaling molecules known to be involved in myogenic differentiation. In summary, our current study reveals a novel role for the JAK2/STAT2/STAT3 pathway in myogenic differentiation.
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