Periplaneta Americana Extract May Attenuate Renal Fibrosis through Inhibiting Janus Tyrosine Kinase 2/Signal Transducer and Activator of Transcription 3 Pathway

Jingsong Liu, Lin Zhou, Liyu He, Ying Zhong, Xiaobai Zhang, Bofei Xiao, Guoyong Liu
In: Pharmacology · 2018 · vol. 102(1-2) , pp. 1–8 · doi:10.1159/000488535 · PMID:29669350 · W2799738448
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Abstract

BACKGROUND: Periplaneta americana is one of the ancient insect groups with the strongest vitality. Periplaneta americana extract (PAE) has been explored as an alternative remedy for many diseases. Although much progress has been made in the study about PAE, the role of the drug in renal disease is rarely reported, especially in renal fibrosis. This study was designed to evaluate the renoprotective effect of PAE treatment to renal fibrosis. METHOD: An in vivo, unilateral ureteral obstruction (UUO) mouse model was built. Then the mice were treated with PAE (100 mg/kg body weight) once daily by oral gavage, again starting on the day of UUO and continued for 1 week. At the end of 1 week, the mice were sacrificed; kidney samples were collected for further analysis. In vitro, Boston University mouse proximal tubular cells were plated in 35-mm dishes at a density of 0.3 * 106 cells/dish. Then the cells were treated with 5-ng/mL TGF-β1 in serum-free DMEM medium for an indicated length of time. The experimental groups were pretreated with the indicated concentrations of PAE (0.3125 mg/mL). The cells were further cultured for 24 h, and then cells were monitored morphologically or collected for biochemical analyses. RESULTS: Both in vivo and vitro PAE inhibits the expression of FN and alpha-smooth muscle actin and suppresses renal fibrosis. Importantly, PAE protects against renal fibrosis by inhibiting Janus tyrosine kinase 2 (JAK)/signal transducer and activator of transcription 3 (STAT) tyrosine phosphorylation. CONCLUSION: PAE attenuates renal fibrosis through the suppression of the JAK2/STAT3 pathway.

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