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Iranian Journal of Basic Medical Sciences، جلد ۲۰، شماره ۱۰، صفحات ۱۱۲۵-۱۱۳۰
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عنوان انگلیسی The downregulation of ATG4B mediated by microRNA-34a/34c-5p suppresses rapamycin-induced autophagy
چکیده انگلیسی مقاله Objective(s): Autophagy-related 4B (ATG4B) plays an important role in the process of autophagy induction. However, the molecular events that govern the expression of ATG4B in this process are not well known. Materials and Methods: Human ATG4B 3'-UTR region (1377 nt) containing miR-34a/miR-34c-5p binding site was amplified by PCR. Luciferase assay was used to assess the activity of reporter genes. Real-time PCR was used to detect the levels of miR-34a and miR-34c-5p. Western blot was used to analyze the protein levels of ATG4B, LC3 and p62. Results: Both miR-34a and miR-34c-5p could directly target the 3'-UTR of ATG4B mRNA at same site. Overexpression of either miR-34a or miR-34c-5p significantly down-regulated ATG4B at both mRNA and protein levels and this effect can be reversed by ATG4B overexpression. Moreover, Rapamycin-induced autophagy is accompanied with the upregulation of ATG4B and the downregulation of miR-34a/miR-34c-5p. Ectopic expression of either miR-34a or miR-34c-5p markedly suppressed rapamycin-triggered autophagy. Conclusion: In the present study, we found that miR34/ATG4B signaling axis involves in rapamycin-triggered autophagy. This study may provide a new insight for understanding the mechanisms of ATG4B regulation and autophagy induction.
کلیدواژه‌های انگلیسی مقاله Autophagy, ATG4B, miR-34a, miR-34c-5p, Rapamycin
نویسندگان مقاله یاران wu | yaran wu
department of biochemistry and molecular biology, college of basic medical sciences, third military medical university, chongqing 400038, china


xufang دایی | xufang dai
department of educational science college, chongqing normal university, chongqing 400047, china


zhenhong ni | zhenhong ni
department of biochemistry and molecular biology, college of basic medical sciences, third military medical university, chongqing 400038, china


xiaojing یان | xiaojing yan
department of biochemistry and molecular biology, college of basic medical sciences, third military medical university, chongqing 400038, china


fengtian he | fengtian he
department of biochemistry and molecular biology, college of basic medical sciences, third military medical university, chongqing 400038, china


jiqin لیان | jiqin lian
department of biochemistry and molecular biology, college of basic medical sciences, third military medical university, chongqing 400038, china
نشانی اینترنتی http://ijbms.mums.ac.ir/article_9446.html
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article
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