PMID- 36053135 OWN - NLM STAT- MEDLINE DCOM- 20220907 LR - 20220907 IS - 1607-8454 (Electronic) IS - 1024-5332 (Linking) VI - 27 IP - 1 DP - 2022 Dec TI - Formosanin C induces autophagy-mediated apoptosis in multiple myeloma cells through the PI3K/AKT/mTOR signaling pathway. PG - 977-986 LID - 10.1080/16078454.2022.2117126 [doi] AB - OBJECTIVES: Multiple myeloma (MM) is an incurable plasma cell malignancy associated with poor survival. Novel therapeutic drugs are urgently needed to improve MM therapy and patient outcomes. This study aimed to investigate the effect of formosanin C (FC), a Chinese medicine monomer, on MM in vitro and disclose the underlying molecular mechanism. METHODS: The effect of FC on the viability, proliferation, apoptosis, and autophagy of MM cell lines (NCI-H929 and ARP1) was studied through CCK-8, colony formation, flow cytometry, GFP-LC3, and western blotting assays, respectively. A pharmacological approach and network pharmacology technology were implemented to explore the potential mechanisms of the action of FC on MM cells. RESULTS: FC efficiently suppressed the viability and colony-forming capacity, but promoted the number of autophagic vacuoles with GFP-LC3 localization and the percentage of apoptotic cells in MM cells. Additionally, FC significantly increased the levels of the autophagy-related proteins LC3-Ⅱ and Beclin 1, as well as the apoptosis-related proteins Bax and cleaved caspase-3, but blocked the expression of the proapoptotic protein Bcl-2 in the cells; these effects were reversed by an inhibitor of autophagy, 3-methyladenine. What's more, we found that the phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) signaling pathway was involved in the FC-mediated inhibition of MM. Pharmacological inhibition of this pathway dramatically relieved FC-triggered excessive expression of autophagy-related proteins and rescued MM cells from FC-induced apoptosis. CONCLUSION: Our findings indicate that FC exhibits an anti-MM effect by activating cell autophagy through the PI3K/AKT/mTOR signaling pathway. FAU - Chen, Ping AU - Chen P AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. AD - Department of Hematology, Nanjing Hospital of Chinese Medicine, Nanjing, People's Republic of China. FAU - Wu, Sungui AU - Wu S AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. FAU - Dong, Xiaoqing AU - Dong X AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. FAU - Zhou, Min AU - Zhou M AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. FAU - Xu, Peipei AU - Xu P AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. FAU - Chen, Bing AU - Chen B AUID- ORCID: 0000-0001-8303-2531 AD - Department of Hematology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. LA - eng PT - Journal Article PL - England TA - Hematology JT - Hematology (Amsterdam, Netherlands) JID - 9708388 RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (Autophagy-Related Proteins) RN - 0 (Saponins) RN - 50773-42-7 (formosanin C) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.1.137 (Phosphatidylinositol 3-Kinase) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - K49P2K8WLX (Diosgenin) SB - IM MH - Apoptosis MH - Apoptosis Regulatory Proteins/metabolism MH - Autophagy MH - Autophagy-Related Proteins/pharmacology MH - Cell Line, Tumor MH - Diosgenin/analogs & derivatives MH - Humans MH - *Multiple Myeloma/drug therapy MH - Phosphatidylinositol 3-Kinase/metabolism/pharmacology MH - Phosphatidylinositol 3-Kinases/metabolism MH - *Proto-Oncogene Proteins c-akt/metabolism MH - Saponins MH - Signal Transduction MH - TOR Serine-Threonine Kinases/metabolism OTO - NOTNLM OT - Formosanin C OT - PI3K/AKT/mTOR OT - apoptosis OT - autophagy OT - multiple myeloma EDAT- 2022/09/03 06:00 MHDA- 2022/09/08 06:00 CRDT- 2022/09/02 09:32 PHST- 2022/09/02 09:32 [entrez] PHST- 2022/09/03 06:00 [pubmed] PHST- 2022/09/08 06:00 [medline] AID - 10.1080/16078454.2022.2117126 [doi] PST - ppublish SO - Hematology. 2022 Dec;27(1):977-986. doi: 10.1080/16078454.2022.2117126.