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  • Title: Overexpression of lncRNA ANRIL up-regulates VEGF expression and promotes angiogenesis of diabetes mellitus combined with cerebral infarction by activating NF-κB signaling pathway in a rat model.
    Author: Zhang B, Wang D, Ji TF, Shi L, Yu JL.
    Journal: Oncotarget; 2017 Mar 07; 8(10):17347-17359. PubMed ID: 28060742.
    Abstract:
    OBJECTIVE: This study aimed to explore the effects of lncRNA ANRIL on vascular endothelial growth factor (VEGF) and angiogenesis in diabetes mellitus (DM) combined with cerebral infarction (CI) through NF-κB signaling pathway. METHODS: Adult male Wistar rats were randomly divided into control group and DM + CI group, and the DM + CI group were subdivided into Vector, shANRIL, PDTC, pcDNA-ANRIL, and pcDNA-ANRIL + PDTC groups. VEGF and FMS-like tyrosine kinase (FLT-1) expressions were measured by immunohistochemistry and endothelium dependent microvessel density (MVD) was detected by differentiation 31 (CD31) and para-amiuosalicylic acid (PAS) double staining. The qRT-PCR was applied to measure mRNA expressions of VEGF, FLT-1, Kinase insert domain protein receptor (FLK-1) and NF-κB, and Western blotting was conducted to detected expressions of VEGF, NF-κB and p-IκB/IκB. RESULTS: Compared with the control group, protein expressions of VEGF, NF-κB, p-IκB/IκB, expression of ANRIL, and mRNA expressions of VEGF, FLT-1 and NF-κB were increased in the DM + CI group. Compared with the Vector group, protein expressions of VEGF, NF-κB, p-IκB/IκB, expression of ANRIL, mRNA expressions of VEGF, FLT-1 and NF-κB, and endothelium dependent MVD were increased in the pcDNA-ANRIL group, while decreased in the shANRIL group and PDTC group. Compared with the pcDNA-ANRIL group, protein expressions of VEGF, NF-κB, p-IκB/IκB, expression of ANRIL, mRNA expressions of VEGF, FLT-1 and NF-κB, and endothelium dependent MVD were decreased in the pcDNA-ANRIL + PDTC group. CONCLUSION: Overexpressed lncRNA ANRIL upregulates VEGF and promotes angiogenesis by activating NF-κB signaling pathway in DM + CI rats. .
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