PMID- 37485551 OWN - NLM STAT- MEDLINE DCOM- 20231023 LR - 20231107 IS - 1439-7633 (Electronic) IS - 1439-4227 (Linking) VI - 24 IP - 20 DP - 2023 Oct 17 TI - beta-Carboline Alkaloids Resist the Aggregation and Cytotoxicity of Human Islet Amyloid Polypeptide. PG - e202300395 LID - 10.1002/cbic.202300395 [doi] AB - beta-Carboline alkaloids have a variety of pharmacological activities, such as antitumor, antibiosis and antidiabetes. Harmine and harmol are two structurally similar beta-carbolines that occur in many medicinal plants. In this work, we chose harmine and harmol to impede the amyloid fibril formation of human islet amyloid polypeptide (hIAPP) associated with type 2 diabetes mellitus (T2DM), by a series of physicochemical and biochemical methods. The results indicate that harmine and harmol effectively prevent peptide fibril formation and alleviate toxic oligomer species. In addition, both small molecules exhibit strong binding affinities with hIAPP mainly through hydrophobic and hydrogen bonding interactions, thus reducing the cytotoxicity induced by hIAPP. Their distinct binding pattern with hIAPP is closely linked to the molecular configuration of the two small molecules, affecting their ability to impede peptide aggregation. The study is of great significance for the application and development of beta-carboline alkaloids against T2DM. CI - (c) 2023 Wiley-VCH GmbH. FAU - Wang, Yanan AU - Wang Y AD - Department of Chemistry, Renmin University of China, No.59, Zhong Guan Cun Street Haidian District, Beijing, 100872, P. R. China. FAU - Huo, Yan AU - Huo Y AD - Department of Chemistry, Renmin University of China, No.59, Zhong Guan Cun Street Haidian District, Beijing, 100872, P. R. China. FAU - Wang, Shao AU - Wang S AD - Department of Chemistry, Renmin University of China, No.59, Zhong Guan Cun Street Haidian District, Beijing, 100872, P. R. China. FAU - Zheng, Ting AU - Zheng T AD - Department of Chemistry, Renmin University of China, No.59, Zhong Guan Cun Street Haidian District, Beijing, 100872, P. R. China. FAU - Du, Weihong AU - Du W AUID- ORCID: 0000-0002-9976-4515 AD - Department of Chemistry, Renmin University of China, No.59, Zhong Guan Cun Street Haidian District, Beijing, 100872, P. R. China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230822 PL - Germany TA - Chembiochem JT - Chembiochem : a European journal of chemical biology JID - 100937360 RN - 0 (Islet Amyloid Polypeptide) RN - 94HMA1I78O (norharman) RN - 4FHH5G48T7 (Harmine) RN - 0 (Amyloid) SB - IM MH - Humans MH - *Diabetes Mellitus, Type 2/metabolism/pathology MH - Islet Amyloid Polypeptide/chemistry MH - Harmine MH - Amyloid/chemistry OTO - NOTNLM OT - aggregation OT - beta-carboline OT - hIAPP OT - inhibition OT - interactions EDAT- 2023/07/24 06:42 MHDA- 2023/10/23 00:43 CRDT- 2023/07/24 05:00 PHST- 2023/07/18 00:00 [revised] PHST- 2023/05/25 00:00 [received] PHST- 2023/10/23 00:43 [medline] PHST- 2023/07/24 06:42 [pubmed] PHST- 2023/07/24 05:00 [entrez] AID - 10.1002/cbic.202300395 [doi] PST - ppublish SO - Chembiochem. 2023 Oct 17;24(20):e202300395. doi: 10.1002/cbic.202300395. Epub 2023 Aug 22.