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Meng X, Long M, Yue N, Li Q, Chen J, Zhao H, Deng W. LncRNA MEG3 Restrains Hepatic Lipogenesis via the FOXO1 Signaling Pathway in HepG2 Cells. Cell Biochem Biophys 2024:10.1007/s12013-024-01278-w. [PMID: 38713402 DOI: 10.1007/s12013-024-01278-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2024] [Indexed: 05/08/2024]
Abstract
Nonalcoholic fatty liver disease (NAFLD) become a main public health concern, and is characterized by lipid accumulation in the hepatocytes. We found that overexpression of lncRNA MEG3 significantly reduced the expression of FOXO1, ACC1, and FAS, and subsequently decreased the lipid accumulation in HepG2 cells. Moreover, inhibition of lncRNA MEG3 could increase the lipid accumulation and the mRNA and protein levels of FOXO1, ACC1, and FAS. Further study showed that lncRNA MEG3 regulates the lipogenesis process by inhibiting the entry of FOXO1 into the nucleus translocation. Our study demonstrated that lncRNA MEG3 regulates de novo lipogenesis by decreasing the expression and nucleus translocation of FOXO1 in HepG2 cells, suggesting that lncRNA MEG3 could be a promising therapeutic target in lipid metabolic disorders.
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Affiliation(s)
- Xiangyu Meng
- The Central Laboratory, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Mei Long
- Department of Cardiology, ZiBo Central Hospital, Zibo, Shandong, 255000, China
| | - Nanxi Yue
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neural and Vascular Biology, Ministry of Education of China, Hebei Medical University, Shijiazhuang, Hebei, 050017, PR China
| | - Quan Li
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Jia Chen
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Hongye Zhao
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neural and Vascular Biology, Ministry of Education of China, Hebei Medical University, Shijiazhuang, Hebei, 050017, PR China.
| | - Wei Deng
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China.
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Lin CA, Hayashi N, Badenhorst CE, Goto K. Effect of Amino Acid Supplementation on Iron Regulation after Endurance Exercise. Nutrients 2023; 15:4924. [PMID: 38068782 PMCID: PMC10708027 DOI: 10.3390/nu15234924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023] Open
Abstract
The purpose of this study was to determine the effects of pre-exercise amino acid (AA) supplementation on post-exercise iron regulation. Ten healthy males participated under two different sets of conditions in a randomized, double-blind, crossover design with a washout period of at least 21 days. Participants received either an AA supplement or placebo (PLA) for five consecutive days (4 g/dose, 3 doses/day). On the sixth day, participants ran on a treadmill for 60 min at 70% of maximal oxygen consumption (V˙O2max). Venous blood samples were collected before (baseline), immediately after, and 1 and 3 h after exercise. The serum hepcidin levels increased significantly 3 h post-exercise in both trials when compared to the baseline (p < 0.001), but the levels were not different between trials. The plasma interleukin-6 (IL-6) level significantly increased immediately after exercise compared to the baseline (p < 0.001) and was significantly higher in the AA trial than in the PLA trial (p = 0.014). Moreover, the exercise-induced increase in serum glycerol level was significantly higher in the AA trial (21.20 ± 3.98 mg/L) than in the PLA trial (17.28 ± 4.47 mg/L, p = 0.017). No significant differences were observed between the AA and PLA trials for serum iron, ferritin, and total ketone body levels (p > 0.05). In conclusion, five days of AA supplementation augmented exercise-induced increases in IL-6 and glycerol in healthy males. However, it did not affect post-exercise iron status or regulation.
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Affiliation(s)
- Chao-An Lin
- Graduate School of Sport and Health Science, Ritsumeikan University, Shiga 525-8577, Japan;
| | - Nanako Hayashi
- Department of Exercise Physiology, Nippon Sport Science University, Tokyo 158-8508, Japan;
| | - Claire E. Badenhorst
- School of Sport, Exercise and Nutrition, College of Health, Massey University, Private Bag 102904, Auckland 0745, New Zealand;
| | - Kazushige Goto
- Graduate School of Sport and Health Science, Ritsumeikan University, Shiga 525-8577, Japan;
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Chen X, Wang Z, Deng R, Yan H, Liu X, Kang R. Intervertebral disc degeneration and inflammatory microenvironment: expression, pathology, and therapeutic strategies. Inflamm Res 2023; 72:1811-1828. [PMID: 37665342 DOI: 10.1007/s00011-023-01784-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 08/09/2023] [Indexed: 09/05/2023] Open
Abstract
BACKGROUND Intervertebral disc degeneration (IDD) is a leading cause of low back pain (LBP), posing a significant socioeconomic burden. Recent studies highlight the crucial role of inflammatory microenvironment in IDD progression. METHOD A keyword-based search was performed using the PubMed database for published articles. RESULTS AND CONCLUSIONS Dysregulated expression of inflammatory cytokines disrupts intervertebral disc (IVD) homeostasis, causing atrophy, fibrosis, and phenotypic changes in nucleus pulposus cells. Modulating the inflammatory microenvironment and restoring cytokine balance hold promise for IVD repair and regeneration. This comprehensive review systematically examines the expression regulation, pathological effects, therapeutic strategies, and future challenges associated with the inflammatory microenvironment and relevant cytokines in IDD. Key inflammatory cytokines, including interleukins (IL), tumor necrosis factor-alpha (TNF-α), and chemokines, exhibit significant pathological effects in IDD. Furthermore, major therapeutic modalities such as chemical antagonists, biologics, plant extracts, and gene transcription therapies are introduced to control and ameliorate the inflammatory microenvironment. These approaches provide valuable insights for identifying potential targets in future anti-inflammatory treatments for IDD.
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Affiliation(s)
- Xin Chen
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China
| | - Zihan Wang
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China
| | - Rongrong Deng
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China
| | - Hongjie Yan
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China
| | - Xin Liu
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China.
| | - Ran Kang
- The Third Clinical Medical College, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China.
- Department of Orthopedics, Nanjing Lishui Hospital of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu, People's Republic of China.
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de Baat A, Trinh B, Ellingsgaard H, Donath MY. Physiological role of cytokines in the regulation of mammalian metabolism. Trends Immunol 2023:S1471-4906(23)00110-2. [PMID: 37423882 DOI: 10.1016/j.it.2023.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/09/2023] [Accepted: 06/09/2023] [Indexed: 07/11/2023]
Abstract
The innate cytokine system is involved in the response to excessive food intake. In this review, we highlight recent advances in our understanding of the physiological role of three prominent cytokines, interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF), in mammalian metabolic regulation. This recent research highlights the pleiotropic and context-dependent functions in the immune-metabolic interplay. IL-1β is activated in response to overloaded mitochondrial metabolism, stimulates insulin secretion, and allocates energy to immune cells. IL-6 is released by contracting skeletal muscle and adipose tissue and directs energy from storing tissues to consuming tissues. TNF induces insulin resistance and prevents ketogenesis. Additionally, the therapeutic potential of modulating the activity of each cytokine is discussed.
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Affiliation(s)
- Axel de Baat
- Clinic of Endocrinology, Diabetes and Metabolism University Hospital Basel, Basel, Switzerland; Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Beckey Trinh
- The Centre for Physical Activity Research, Rigshospitalet, Copenhagen, Denmark
| | - Helga Ellingsgaard
- The Centre for Physical Activity Research, Rigshospitalet, Copenhagen, Denmark
| | - Marc Y Donath
- Clinic of Endocrinology, Diabetes and Metabolism University Hospital Basel, Basel, Switzerland; Department of Biomedicine, University of Basel, Basel, Switzerland.
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