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Hung KC, Tien N, Bau DT, Yao CH, Chen CH, Yang JL, Lin ML, Chen SS. Let-7g Upregulation Attenuated the KRAS-PI3K-Rac1-Akt Axis-Mediated Bioenergetic Functions. Cells 2023; 12:2313. [PMID: 37759534 PMCID: PMC10527334 DOI: 10.3390/cells12182313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/04/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
The aberrant activation of signaling pathways contributes to cancer cells with metabolic reprogramming. Thus, targeting signaling modulators is considered a potential therapeutic strategy for cancer. Subcellular fractionation, coimmunoprecipitation, biochemical analysis, and gene manipulation experiments revealed that decreasing the interaction of kirsten rat sarcoma viral oncogene homolog (KRAS) with p110α in lipid rafts with the use of naringenin (NGN), a citrus flavonoid, causes lipid raft-associated phosphatidylinositol 3-kinase (PI3K)-GTP-ras-related C3 botulinum toxin substrate 1 (Rac1)-protein kinase B (Akt)-regulated metabolic dysfunction of glycolysis and mitochondrial oxidative phosphorylation (OXPHOS), leading to apoptosis in human nasopharyngeal carcinoma (NPC) cells. The use of lethal-7g (let-7g) mimic and let-7g inhibitor confirmed that elevated let-7g resulted in a decrease in KRAS expression, which attenuated the PI3K-Rac1-Akt-BCL-2/BCL-xL-modulated mitochondrial energy metabolic functions. Increased let-7g depends on the suppression of the RNA-specificity of monocyte chemoattractant protein-induced protein-1 (MCPIP1) ribonuclease since NGN specifically blocks the degradation of pre-let-7g by NPC cell-derived immunoprecipitated MCPIP1. Converging lines of evidence indicate that the inhibition of MCPIP1 by NGN leads to let-7g upregulation, suppressing oncogenic KRAS-modulated PI3K-Rac1-Akt signaling and thereby impeding the metabolic activities of aerobic glycolysis and mitochondrial OXPHOS.
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Affiliation(s)
- Kuang-Chen Hung
- Division of Neurosurgery, Department of Surgery, Taichung Army Force General Hospital, Taichung 41152, Taiwan;
- Department of Surgery, National Defense Medical Center, Taipei 11490, Taiwan
- General Education Center, College of Humanities and General Education, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan
| | - Ni Tien
- Department of Laboratory Medicine, China Medical University Hospital, Taichung 404394, Taiwan;
| | - Da-Tian Bau
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 404333, Taiwan;
| | - Chun-Hsu Yao
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung 404333, Taiwan;
| | - Chan-Hung Chen
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 404333, Taiwan;
| | - Jiun-Long Yang
- Department of Nursing, St. Mary’s Junior College of Medicine, Nursing and Management, Yilan 26644, Taiwan;
| | - Meng-Liang Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 404333, Taiwan;
| | - Shih-Shun Chen
- Department of Medical Laboratory Science and Biotechnology, College of Medical and Health Science, Asia University, Taichung 413305, Taiwan
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Krga I, Corral-Jara KF, Barber-Chamoux N, Dubray C, Morand C, Milenkovic D. Grapefruit Juice Flavanones Modulate the Expression of Genes Regulating Inflammation, Cell Interactions and Vascular Function in Peripheral Blood Mononuclear Cells of Postmenopausal Women. Front Nutr 2022; 9:907595. [PMID: 35694160 PMCID: PMC9178201 DOI: 10.3389/fnut.2022.907595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 04/26/2022] [Indexed: 12/04/2022] Open
Abstract
Grapefruit is a rich source of flavanones, phytochemicals suggested excreting vasculoprotective effects. We previously showed that flavanones in grapefruit juice (GFJ) reduced postmenopausal women’s pulse-wave velocity (PWV), a measure of arterial stiffness. However, mechanisms of flavanone action in humans are largely unknown. This study aimed to decipher molecular mechanisms of flavanones by multi-omics analysis in PBMCs of volunteers consuming GFJ and flavanone-free control drink for 6 months. Modulated genes and microRNAs (miRNAs) were identified using microarrays. Bioinformatics analyses assessed their functions, interactions and correlations with previously observed changes in PWV. GFJ modified gene and miRNA expressions. Integrated analysis of modulated genes and miRNA-target genes suggests regulation of inflammation, immune response, cell interaction and mobility. Bioinformatics identified putative mediators of the observed nutrigenomic effect (STAT3, NF-κB) and molecular docking demonstrated potential binding of flavanone metabolites to transcription factors and cell-signaling proteins. We also observed 34 significant correlations between changes in gene expression and PWV. Moreover, global gene expression was negatively correlated with gene expression profiles in arterial stiffness and hypertension. This study revealed molecular mechanisms underlying vasculoprotective effects of flavanones, including interactions with transcription factors and gene and miRNA expression changes that inversely correlate with gene expression profiles associated with cardiovascular risk factors.
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Affiliation(s)
- Irena Krga
- Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | | | | | - Claude Dubray
- Institut National de la Santé et de la Recherche Médicale (INSERM), CIC 501, UMR 766, Clermont-Ferrand, France
| | - Christine Morand
- Université Clermont Auvergne, INRAE, UNH, Clermont-Ferrand, France
| | - Dragan Milenkovic
- Université Clermont Auvergne, INRAE, UNH, Clermont-Ferrand, France
- Department of Nutrition, College of Agricultural and Environmental Sciences, University of California, Davis, Davis, CA, United States
- *Correspondence: Dragan Milenkovic,
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Zhao N, Yu H, Xi Y, Dong M, Wang Y, Sun C, Zhang J, Xu N, Liu W. MicroRNA-221-5p promotes [Korcheva, 2007 #167] via PI3K/Akt signaling pathway by targeting COL4a5. Toxicon 2022; 212:11-18. [DOI: 10.1016/j.toxicon.2022.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 10/18/2022]
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