PMID- 32469848 OWN - NLM STAT- MEDLINE DCOM- 20210216 LR - 20210216 IS - 1643-3750 (Electronic) IS - 1234-1010 (Print) IS - 1234-1010 (Linking) VI - 26 DP - 2020 May 29 TI - Nicotinamide Inhibits Glycolysis of HL-60 Cells by Modulating Sirtuin 1 (SIRT1)/Peroxisome Proliferator-Activated Receptor gamma Coactivator 1alpha (PGC-1alpha)/Hypoxia-Inducible Factor-2alpha (HIF2alpha) Signaling Pathway. PG - e920810 LID - 10.12659/MSM.920810 [doi] AB - BACKGROUND Nicotinamide can affect differentiation and proliferation of leukemia cells. This research aimed to explore the regulatory effect of nicotinamide on glycolysis metabolism of leukemia cells and to clarify the associated mechanisms. MATERIAL AND METHODS HL-60 cells were treated with nicotinamide and divided into 0.1, 1, and 10 mumol/l groups. HL-60 cells without any administration were assigned as negative control (CT group). Glucolytic activity was evaluated by detecting lactic acid production, and glucose level was measured using glucose consumption assay. Apoptosis of HL-60 was examined using flow cytometry assay, when cells were cultured for 24 h. Expressions of sirtuin 1 (SIRT1), peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC-1alpha), and hypoxia-inducible factor-2alpha (HIF2alpha) were evaluated using a reverse transcription PCR assay and Western blotting assay, respectively. RESULTS Nicotinamide remarkably decreased lactic acid production and glucose levels in leukemia cells compared with that of the CT group (p<0.05). Nicotinamide significantly induced the apoptosis of HL-60 cells compared to that of the negative control group (p<0.05). Nicotinamide significantly inhibited the SIRT1/PGC-1alpha/HIF2alpha signaling pathway mRNAs compared to that of the CT group (p<0.05). Nicotinamide remarkably reduced mitochondrial regulatory factors SIRT1/PGC-1alpha expression compared to that in the CT group (p<0.05). Nicotinamide obviously downregulated HIF2alpha compared with that of the CT group (p<0.05). Moreover, all of the above nicotinamide-induced effects, including glycolytic activity, apoptosis, and expression of SIRT1/PGC-1alpha/HIF2alpha, were changed in a dose-dependent manner. CONCLUSIONS Nicotinamide can inhibit glycolysis of HL-60 cells by inhibiting the mitochondrial regulatory factor SIRT1/PGC-1alpha and suppressing transcription factor HIF2alpha. FAU - Liu, Miao AU - Liu M AD - Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China (mainland). FAU - Zhou, Pan AU - Zhou P AD - Hubei Medical Devices, Quality Supervision and Test Institute, Wuhan, Hubei, China (mainland). FAU - Li, Jiaojiao AU - Li J AD - Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China (mainland). FAU - Jiang, Yi AU - Jiang Y AD - Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China (mainland). LA - eng PT - Journal Article DEP - 20200529 PL - United States TA - Med Sci Monit JT - Medical science monitor : international medical journal of experimental and clinical research JID - 9609063 RN - 0 (Basic Helix-Loop-Helix Transcription Factors) RN - 0 (PPAR gamma) RN - 0 (PPARGC1A protein, human) RN - 0 (Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha) RN - 0 (Transcription Factors) RN - 1B37H0967P (endothelial PAS domain-containing protein 1) RN - 25X51I8RD4 (Niacinamide) RN - EC 3.5.1.- (SIRT1 protein, human) RN - EC 3.5.1.- (Sirtuin 1) RN - EC 3.5.1.- (Sirtuins) SB - IM MH - Apoptosis/drug effects MH - Basic Helix-Loop-Helix Transcription Factors/metabolism MH - Gene Expression Regulation/genetics MH - HL-60 Cells/drug effects MH - Humans MH - Hypoxia/metabolism MH - Leukemia/*metabolism MH - Niacinamide/metabolism/*pharmacology MH - PPAR gamma/metabolism MH - Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism MH - Signal Transduction/drug effects MH - Sirtuin 1/metabolism MH - Sirtuins/metabolism MH - Transcription Factors/metabolism PMC - PMC7282349 COIS- Conflict of interest None. EDAT- 2020/05/30 06:00 MHDA- 2021/02/17 06:00 PMCR- 2020/05/29 CRDT- 2020/05/30 06:00 PHST- 2020/05/30 06:00 [entrez] PHST- 2020/05/30 06:00 [pubmed] PHST- 2021/02/17 06:00 [medline] PHST- 2020/05/29 00:00 [pmc-release] AID - 920810 [pii] AID - 10.12659/MSM.920810 [doi] PST - epublish SO - Med Sci Monit. 2020 May 29;26:e920810. doi: 10.12659/MSM.920810.