PMID- 32557691 OWN - NLM STAT- MEDLINE DCOM- 20210830 LR - 20211204 IS - 1097-4652 (Electronic) IS - 0021-9541 (Linking) VI - 236 IP - 1 DP - 2021 Jan TI - Asprosin promotes beta-cell apoptosis by inhibiting the autophagy of beta-cell via AMPK-mTOR pathway. PG - 215-221 LID - 10.1002/jcp.29835 [doi] AB - Asprosin is a newly discovered adipokine. A recent study showed that asprosin promoted the beta-cell apoptosis of MIN6 cells. This study aims to determine whether asprosin induces the apoptosis in beta-cell via regulating autophagy. Mouse insulinoma MIN6 cells were divided into the following four groups: control, vehicle, high glucose, and asprosin groups. MIN6 cells in the asprosin group were transfected with recombinant asprosin-T2A-GFP vector. MIN6 cells in the vehicle group were transfected with vector only. Then the apoptosis of MIN6 cells was detected using flow cytometry. Real-time polymerase chain reaction and western blot were used to determine the expression of caspase 3, LC3-I, LC3-II, beclin 1, P62, AMP activated protein kinase (AMPK), and mammalian target of rapamycin (mTOR). AMPK pathway was enhanced using AMPK agonist AICAR. High glucose and asprosin induced the apoptosis of MIN6 cells and elevated expression of caspase 3. In addition, high glucose and asprosin resulted in reduced expression of LC3-II/LC3-I, beclin 1, and increased expression of P62. p-AMPK expression was decreased and p-mTOR expression was increased after high glucose and asprosin treatment. AMPK agonist AICAR was used to activate the AMPK pathway. Treatment with AICAR significantly partly restored decreased autophagy and increased apoptosis of beta-cell, which was induced by asprosin. Asprosin promotes the apoptosis of beta-cell by inhibiting the autophagy of beta-cell via AMPK-mTOR pathway. CI - (c) 2020 Wiley Periodicals LLC. FAU - Wang, Rui AU - Wang R AD - Department of Blood Transfusion, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China. FAU - Hu, Wenchao AU - Hu W AUID- ORCID: 0000-0003-0230-1264 AD - Department of Endocrinology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200618 PL - United States TA - J Cell Physiol JT - Journal of cellular physiology JID - 0050222 RN - 0 (Fibrillin-1) RN - 0 (Peptide Fragments) RN - 0 (Peptide Hormones) RN - 0 (asprosin protein, mouse) RN - EC 2.7.1.1 (mTOR protein, mouse) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.31 (AMP-Activated Protein Kinases) SB - IM MH - AMP-Activated Protein Kinases/*metabolism MH - Animals MH - Apoptosis/*physiology MH - Autophagy/drug effects MH - Cells, Cultured MH - Fibrillin-1/*metabolism MH - Insulin-Secreting Cells/*metabolism MH - Mice MH - Peptide Fragments/*metabolism MH - Peptide Hormones/*metabolism MH - Signal Transduction/*physiology MH - TOR Serine-Threonine Kinases/*metabolism OTO - NOTNLM OT - AMPK OT - apoptosis OT - asprosin OT - autophagy OT - beta-cell EDAT- 2020/06/20 06:00 MHDA- 2021/08/31 06:00 CRDT- 2020/06/20 06:00 PHST- 2020/02/21 00:00 [received] PHST- 2020/05/19 00:00 [revised] PHST- 2020/05/20 00:00 [accepted] PHST- 2020/06/20 06:00 [pubmed] PHST- 2021/08/31 06:00 [medline] PHST- 2020/06/20 06:00 [entrez] AID - 10.1002/jcp.29835 [doi] PST - ppublish SO - J Cell Physiol. 2021 Jan;236(1):215-221. doi: 10.1002/jcp.29835. Epub 2020 Jun 18.