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Lei S, Li X, Zuo A, Ruan S, Guo Y. CTRP9 alleviates diet induced obesity through increasing lipolysis mediated by enhancing autophagy-initiation complex formation. J Nutr Biochem 2024; 131:109694. [PMID: 38906337 DOI: 10.1016/j.jnutbio.2024.109694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 05/29/2024] [Accepted: 06/17/2024] [Indexed: 06/23/2024]
Abstract
Recently, emerging evidence has suggested that obesity become a prevalent health threat worldwide. Reportedly, CTRP9 can ameliorate HFD induced obesity. However, the molecular mechanism underlying the role of CTRP9 in obesity remains elusive. In this study, we reported its major function in the regulation of lipolysis. First, we found that the expression of CTRP9 was decreased in mature adipocytes and white adipose tissue of obese mice. Then, we showed that overexpression adipose tissue CTRP9 alleviated diet-induced obesity and adipocytes hypertrophy, improved glucose intolerance and raised energy expenditure. Moreover, CTRP9 increased the lipolysis in vitro and vivo. Additionally, we determined that CTRP9 enhanced autophagy flux in adipocytes. Intriguingly, knock down Beclin1 by SiRNA abolished the effect of CTRP9 on lipolysis. Mechanically, CTRP9 enhanced the expression of SNX26. We demonstrated that SNX26 was a component of the ATG14L-Beclin1-VPS34 complex and enhanced the assembly of the autophagy-initiation complex. Collectively, our results suggested that CTRP9 alleviated diet induced obesity through enhancing lipolysis mediated by autophagy-initiation complex formation.
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Affiliation(s)
- Shengyun Lei
- Department of General Medicine, Qilu Hospital of Shandong University,107 Wenhuaxi Road, 250012, Jinan, Shandong, China; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, 250012,Jinan,Shandong, China
| | - Xuehui Li
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, 250012, Jinan, Shandong, China
| | - Anju Zuo
- Department of General Medicine, Qilu Hospital of Shandong University,107 Wenhuaxi Road, 250012, Jinan, Shandong, China; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, 250012,Jinan,Shandong, China
| | - Shiyan Ruan
- Department of General Medicine, Qilu Hospital of Shandong University,107 Wenhuaxi Road, 250012, Jinan, Shandong, China; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, 250012,Jinan,Shandong, China
| | - Yuan Guo
- Department of General Medicine, Qilu Hospital of Shandong University,107 Wenhuaxi Road, 250012, Jinan, Shandong, China; The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, 250012,Jinan,Shandong, China.
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Gao Z, Zhao Q, Hastie T. PathGPS: discover shared genetic architecture using GWAS summary data. Biometrics 2024; 80:ujae060. [PMID: 39005072 PMCID: PMC11247175 DOI: 10.1093/biomtc/ujae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 12/28/2023] [Accepted: 07/05/2024] [Indexed: 07/16/2024]
Abstract
The increasing availability and scale of biobanks and "omic" datasets bring new horizons for understanding biological mechanisms. PathGPS is an exploratory data analysis tool to discover genetic architectures using Genome Wide Association Studies (GWAS) summary data. PathGPS is based on a linear structural equation model where traits are regulated by both genetic and environmental pathways. PathGPS decouples the genetic and environmental components by contrasting the GWAS associations of "signal" genes with those of "noise" genes. From the estimated genetic component, PathGPS then extracts genetic pathways via principal component and factor analysis, leveraging the low-rank and sparse properties. In addition, we provide a bootstrap aggregating ("bagging") algorithm to improve stability under data perturbation and hyperparameter tuning. When applied to a metabolomics dataset and the UK Biobank, PathGPS confirms several known gene-trait clusters and suggests multiple new hypotheses for future investigations.
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Affiliation(s)
- Zijun Gao
- Marshall Business School, University of Southern California, Los Angeles CA, 90089, United States
| | - Qingyuan Zhao
- Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, Cambridge, CB3 0WB, United Kingdom
| | - Trevor Hastie
- Department of Statistics and Department of Biomedical Data Science, Stanford University, Stanford, CA, 94305, United States
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Pinanga YD, Lee HA, Shin EA, Lee H, Pyo KH, Kim JE, Lee EH, Kim W, Kim S, Kim HY, Lee JW. TM4SF5-mediated abnormal food-intake behavior and apelin expression facilitate non-alcoholic fatty liver disease features. iScience 2023; 26:107625. [PMID: 37670786 PMCID: PMC10475478 DOI: 10.1016/j.isci.2023.107625] [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: 03/27/2023] [Revised: 07/10/2023] [Accepted: 08/09/2023] [Indexed: 09/07/2023] Open
Abstract
Transmembrane 4 L six family member 5 (TM4SF5) engages in non-alcoholic steatohepatitis (NASH), although its mechanistic roles are unclear. Genetically engineered Tm4sf5 mice fed ad libitum normal chow or high-fat diet for either an entire day or a daytime-feeding (DF) pattern were analyzed for metabolic parameters. Compared to wild-type and Tm4sf5-/- knockout mice, hepatocyte-specific TM4SF5-overexpressing Alb-TGTm4sf5-Flag (TG) mice showed abnormal food-intake behavior during the mouse-inactive daytime, increased apelin expression, increased food intake, and higher levels of NASH features. DF or exogenous apelin injection of TG mice caused severe hepatic pathology. TM4SF5-mediated abnormal food intake was correlated with peroxisomal β-oxidation, mTOR activation, and autophagy inhibition, with triggering NASH phenotypes. Non-alcoholic fatty liver disease (NAFLD) patients' samples revealed a correlation between serum apelin and NAFLD activity score. Altogether, these observations suggest that hepatic TM4SF5 may cause abnormal food-intake behaviors to trigger steatohepatitic features via the regulation of peroxisomal β-oxidation, mTOR, and autophagy.
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Affiliation(s)
- Yangie Dwi Pinanga
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Han Ah Lee
- Department of Internal Medicine, Ewha Womans University College of Medicine, Division of Gastroenterology and Hepatology, Ewha Womans University Mokdong Hospital, Seoul 07985, Republic of Korea
| | - Eun-Ae Shin
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Haesong Lee
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyung-hee Pyo
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Ji Eon Kim
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun Hae Lee
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Wonsik Kim
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Soyeon Kim
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hwi Young Kim
- Department of Internal Medicine, Ewha Womans University College of Medicine, Division of Gastroenterology and Hepatology, Ewha Womans University Mokdong Hospital, Seoul 07985, Republic of Korea
| | - Jung Weon Lee
- Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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Luo N, Guo Y, Peng L, Deng F. High-fiber-diet-related metabolites improve neurodegenerative symptoms in patients with obesity with diabetes mellitus by modulating the hippocampal-hypothalamic endocrine axis. Front Neurol 2023; 13:1026904. [PMID: 36733447 PMCID: PMC9888315 DOI: 10.3389/fneur.2022.1026904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/09/2022] [Indexed: 01/19/2023] Open
Abstract
Objective Through transcriptomic and metabolomic analyses, this study examined the role of high-fiber diet in obesity complicated by diabetes and neurodegenerative symptoms. Method The expression matrix of high-fiber-diet-related metabolites, blood methylation profile associated with pre-symptomatic dementia in elderly patients with type 2 diabetes mellitus (T2DM), and high-throughput single-cell sequencing data of hippocampal samples from patients with Alzheimer's disease (AD) were retrieved from the Gene Expression Omnibus (GEO) database and through a literature search. Data were analyzed using principal component analysis (PCA) after quality control and data filtering to identify different cell clusters and candidate markers. A protein-protein interaction network was mapped using the STRING database. To further investigate the interaction among high-fiber-diet-related metabolites, methylation-related DEGs related to T2DM, and single-cell marker genes related to AD, AutoDock was used for semi-flexible molecular docking. Result Based on GEO database data and previous studies, 24 marker genes associated with high-fiber diet, T2DM, and AD were identified. Top 10 core genes include SYNE1, ANK2, SPEG, PDZD2, KALRN, PTPRM, PTPRK, BIN1, DOCK9, and NPNT, and their functions are primarily related to autophagy. According to molecular docking analysis, acetamidobenzoic acid, the most substantially altered metabolic marker associated with a high-fiber diet, had the strongest binding affinity for SPEG. Conclusion By targeting the SPEG protein in the hippocampus, acetamidobenzoic acid, a metabolite associated with high-fiber diet, may improve diabetic and neurodegenerative diseases in obese people.
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Affiliation(s)
- Ning Luo
- Department of Endocrinology, Chenzhou No. 1 People's Hospital, Chenzhou, China,*Correspondence: Ning Luo ✉
| | - Yuejie Guo
- Department of Geriatrics, Chenzhou No. 1 People's Hospital, Chenzhou, China
| | - Lihua Peng
- Department of Clinical Laboratory, Chenzhou No. 4 People's Hospital, Chenzhou, China
| | - Fangli Deng
- Breast Health Care Center, Chenzhou No. 1 People's Hospital, Chenzhou, China
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Chen W, Wang X, Sun Q, Zhang Y, Liu J, Hu T, Wu W, Wei C, Liu M, Ding Y, Liu D, Chong Y, Wang P, Zhu H, Cui W, Zhang J, Li Q, Yang F. The upregulation of NLRP3 inflammasome in dorsal root ganglion by ten-eleven translocation methylcytosine dioxygenase 2 (TET2) contributed to diabetic neuropathic pain in mice. J Neuroinflammation 2022; 19:302. [PMID: 36527131 PMCID: PMC9756585 DOI: 10.1186/s12974-022-02669-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The nucleotide oligomerization domain (NOD)-like receptor family pyrin domain containing 3 (NLRP3) in dorsal root ganglion (DRG) contributes to pain hypersensitivity in multiple neuropathic pain models, but the function of the NLRP3 in diabetic neuropathic pain (DNP) and the regulation mechanism are still largely unknown. Epigenetic regulation plays a vital role in the controlling of gene expression. Ten-eleven translocation methylcytosine dioxygenase 2 (TET2) is a DNA demethylase that contributes to transcriptional activation. TET2 is also involved in high glucose (HG)-induced pathology. METHODS DNP was induced in mice via the intraperitoneal injection of streptozotocin (STZ) for five consecutive days and the mechanical threshold was evaluated in STZ-diabetic mice by using von Frey hairs. The expression level of the NLRP3 pathway and TET2 in DRG were determined through molecular biology experiments. The regulation of the NLRP3 pathway by TET2 was examined in in vitro and in vivo conditions. RESULTS In the present research, we first established the DNP model and found that NLRP3 pathway was activated in DRG. The treatment of NLRP3 inhibitor MCC950 alleviated the mechanical allodynia of DNP mice. Then we revealed that in STZ-diabetic mice DRG, the genomic DNA was demethylated, and the expression of DNA demethylase TET2 was increased evidently. Using RNA-sequencing analysis, we found that the expression of Txnip, a gene that encodes a thioredoxin-interacting protein (TXNIP) which mediates NLRP3 activation, was elevated in the DRG after STZ treatment. In addition, knocking down of TET2 expression in DRG using TET2-siRNA suppressed the mRNA expression of Txnip and subsequently inhibited the expression/activation of NLRP3 inflammasome in vitro and in vivo as well as relieved the pain sensitivity of DNP animals. CONCLUSION The results suggested that the upregulation of the TXNIP/NLRP3 pathway by TET2 in DRG was involved in the pain hypersensitivity of the DNP model.
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Affiliation(s)
- Wen Chen
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China ,grid.24695.3c0000 0001 1431 9176International Acupuncture and Moxibustion Innovation Institute, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Xiaotong Wang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Qingyu Sun
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Yurui Zhang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Jing Liu
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Tingting Hu
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Weihua Wu
- grid.24696.3f0000 0004 0369 153XDepartment of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Chao Wei
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Meng Liu
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Yumeng Ding
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Dianxin Liu
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Yingzi Chong
- grid.24696.3f0000 0004 0369 153XDepartment of Anesthesiology Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100070 China
| | - Peipei Wang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Hongwei Zhu
- grid.24696.3f0000 0004 0369 153XBeijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053 China
| | - Weihua Cui
- grid.24696.3f0000 0004 0369 153XDepartment of Anesthesiology Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100070 China
| | - Jiannan Zhang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Qian Li
- grid.24696.3f0000 0004 0369 153XDepartment of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China ,grid.24696.3f0000 0004 0369 153XAdvanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100069 China ,grid.24696.3f0000 0004 0369 153XKey Laboratory of Cancer Invasion and Metastasis Research, Capital Medical University, Beijing, 100069 China
| | - Fei Yang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China ,grid.24696.3f0000 0004 0369 153XAdvanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100069 China
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Kim K, Im H, Son Y, Kim M, Tripathi SK, Jeong LS, Lee YH. Anti-obesity effects of the dual-active adenosine A 2A/A 3 receptor-ligand LJ-4378. Int J Obes (Lond) 2022; 46:2128-2136. [PMID: 36167764 DOI: 10.1038/s41366-022-01224-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND AND OBJECTIVES A2A adenosine receptor (A2AAR)-mediated signaling in adipose tissues has been investigated as a potential target for obesity-related metabolic diseases. LJ-4378 has been developed as a dual-acting ligand with A2AAR agonist and A3 adenosine receptor (A3AR) antagonist activity. The current study aimed to investigate the anti-obesity effects of LJ-4378 and its underlying molecular mechanisms. METHODS Immortalized brown adipocytes were used for in vitro analysis. A high-fat diet (HFD)-induced obesity and cell death-inducing DFFA-like effector A reporter mouse models were used for in vivo experiments. The effects of LJ-4378 on lipolysis and mitochondrial metabolism were evaluated using immunoblotting, mitochondrial staining, and oxygen consumption rate analyses. The in vivo anti-obesity effects of LJ-4378 were evaluated using indirect calorimetry, body composition analyses, glucose tolerance tests, and histochemical analyses. RESULTS In vitro LJ-4378 treatment increased the levels of brown adipocyte markers and mitochondrial proteins, including uncoupling protein 1. The effects of LJ-4378 on lipolysis of adipocytes were more potent than those of the A2AAR agonist or A3AR antagonist. In vivo, LJ-4378 treatment increased energy expenditure by 17.0% (P value < 0.0001) compared to vehicle controls. LJ-4378 (1 mg/kg, i.p.) treatment for 10 days reduced body weight and fat content by 8.24% (P value < 0.0001) and 24.2% (P value = 0.0044), respectively, and improved glucose tolerance in the HFD-fed mice. LJ-4378 increased the expression levels of brown adipocyte markers and mitochondrial proteins in interscapular brown and inguinal white adipose tissue. CONCLUSION These findings support the in vivo anti-obesity effects of LJ-4378, and suggest a novel therapeutic approach to combat obesity and related metabolic diseases.
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Affiliation(s)
- Kyungmin Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Hyeonyeong Im
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Yeonho Son
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Minjae Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Sushil Kumar Tripathi
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Lak Shin Jeong
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea
| | - Yun-Hee Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Korea.
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Jung JW, Kim JE, Kim E, Lee H, Lee H, Shin E, Lee JW. Liver-originated small extracellular vesicles with TM4SF5 target brown adipose tissue for homeostatic glucose clearance. J Extracell Vesicles 2022; 11:e12262. [PMID: 36063136 PMCID: PMC9443943 DOI: 10.1002/jev2.12262] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/27/2022] [Accepted: 08/16/2022] [Indexed: 11/09/2022] Open
Abstract
Transmembrane 4 L six family member 5 (TM4SF5) is involved in chronic liver disease, although its role in glucose homeostasis remains unknown. TM4SF5 deficiency caused age-dependent glucose (in)tolerance with no link to insulin sensitivity. Further, hepatic TM4SF5 binding to GLUT1 promoted glucose uptake and glycolysis. Excessive glucose repletion caused hepatocytes to secrete small extracellular vesicles (sEVs) loaded with TM4SF5 (hep-sEVTm4sf5 ), suggesting a role for sEVTm4sf5 in glucose metabolism and homeostasis. Hep-sEVTm4sf5 were smaller than sEVControl and recruit proteins for efficient organ tropism. Liver-derived sEVs, via a liver-closed vein circuit (LCVC) using hepatic TM4SF5-overexpressing (Alb-Tm4sf5 TG) mice (liv-sEVTm4sf5 ), improved glucose tolerance in Tm4sf5-/- KO mice and targeted brown adipose tissues (BATs), possibly allowing the clearance of blood glucose as heat independent of UCP1. Taken together, hep-sEVTm4sf5 might clear high extracellular glucose levels more efficiently by targeting BAT compared with hep-sEVControl , suggesting an insulin-like role for sEV™4SF5 in affecting age-related metabolic status and thus body weight (BW).
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Affiliation(s)
- Jae Woo Jung
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Research Institute of Pharmaceutical Sciences, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Interdisciplinary Program in Genetic EngineeringSeoul National UniversitySeoulRepublic of Korea
| | - Ji Eon Kim
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Research Institute of Pharmaceutical Sciences, College of PharmacySeoul National UniversitySeoulRepublic of Korea
| | - Eunmi Kim
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Research Institute of Pharmaceutical Sciences, College of PharmacySeoul National UniversitySeoulRepublic of Korea
| | - Hyejin Lee
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
| | - Haesong Lee
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
| | - Eun‐Ae Shin
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
| | - Jung Weon Lee
- Department of Pharmacy, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Research Institute of Pharmaceutical Sciences, College of PharmacySeoul National UniversitySeoulRepublic of Korea
- Interdisciplinary Program in Genetic EngineeringSeoul National UniversitySeoulRepublic of Korea
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Wang G, Liu Y, Zhu X, Lin K, Li M, Wu Z, Zhang R, Zheng Q, Li D, An T. Knockdown of miRNA-134-5p rescues dendritic deficits by promoting AMPK-mediated mitophagy in a mouse model of depression. Neuropharmacology 2022; 214:109154. [PMID: 35659969 DOI: 10.1016/j.neuropharm.2022.109154] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 05/23/2022] [Accepted: 05/29/2022] [Indexed: 12/28/2022]
Abstract
Neuronal dendrites and dendritic spines are essential for normal synaptic transmission and may be critically involved in the pathophysiology of various neurological disorders, including depression. Emerging data supports the role of mitochondria in dendritic protrusions in modulating the development and morphological plasticity of spines. Mitophagy, a mitochondria-specific form of autophagy, is the fundamental process of clearing damaged mitochondria to maintain cellular homeostasis. As a brain-specific microRNA, miR-134 is localized to the synaptodendritic compartment of hippocampal neurons and negatively regulates the development of dendritic spines. However, the role of miR-134 in mitophagy related to dendritic deficits in the pathophysiology of depression remains unclear. In this study, we showed that miR-134-5p knockdown abrogated depressive-like behavioral symptoms and corrected aberrant spine morphology in hippocampal neurons of chronic unpredictable mild stress (CUMS) mice. Moreover, knockdown of miR-134-5p triggered autophagy in dendrites, improved mitochondrial impairment, and induced the generation of autophagosomes in the hippocampus of CUMS mice. We further found that AMP-activated protein kinase (AMPK), which mediates the impairment of defective mitochondria via mitophagy, can bind directly to miR-134-5p and is negatively regulated by this miRNA. This study demonstrates that miR-134-5p exerts an enormous effect on dendritic deficits by promoting AMPK-mediated mitophagy and provides a potential new target for antidepressant drug research and development.
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Affiliation(s)
- Guoli Wang
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China; Collaborative Innovation Platform for Modernization and Industrialization of Regional Characteristic Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Ying Liu
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Xuejie Zhu
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Kehao Lin
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Mingkai Li
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Zhenke Wu
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China
| | - Ronghua Zhang
- School of Pharmacy, Jinan University, Guangzhou, Guangdong, PR China
| | - Qiusheng Zheng
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China; Collaborative Innovation Platform for Modernization and Industrialization of Regional Characteristic Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China.
| | - Defang Li
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China; Collaborative Innovation Platform for Modernization and Industrialization of Regional Characteristic Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China.
| | - Tianyue An
- Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China; Collaborative Innovation Platform for Modernization and Industrialization of Regional Characteristic Traditional Chinese Medicine, School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong, PR China.
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Son Y, Choi C, Saha A, Park JH, Im H, Cho YK, Seong JK, Burl RB, Rondini EA, Granneman JG, Lee YH. REEP6 knockout leads to defective β-adrenergic signaling in adipocytes and promotes obesity-related metabolic dysfunction. Metabolism 2022; 130:155159. [PMID: 35150731 DOI: 10.1016/j.metabol.2022.155159] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/10/2022] [Accepted: 02/02/2022] [Indexed: 12/11/2022]
Abstract
INTRODUCTION The mobilization and catabolism of lipid energy is a central function of adipocytes that is under the control of the β-adrenergic signaling pathway, and defects in β-adrenergic signaling in adipocytes have been linked to obesity and obesity-related metabolic diseases. Receptor expression-enhancing proteins (REEPs) are endoplasmic reticulum (ER) proteins that play critical roles in subcellular targeting of receptor signaling complexes. Examination of gene expression profiles indicates that, among REEPs expressed in adipocytes, REEP6 expression is uniquely upregulated by sympathetic nervous system activation, suggesting involvement in regulating adrenergic signal transduction. OBJECTIVE The aim of this study was to assess the contribution of REEP6 to the thermogenic activation of adipocytes and characterize the metabolic consequences of REEP6 deficiency in vivo. METHODS Expression levels of Reep6 in adipose tissue were examined by using public transcriptomic data and validated by Western blot and qPCR analyses. Adipocyte-specific regulatory roles of REEP6 were investigated in vitro in C3H10T1/2 adipocytes and in primary adipocytes obtained from REEP6 KO mice. Effects of in vivo REEP6 deficiency on energy expenditure were measured by indirect calorimetry. Mitochondrial content in adipose tissue was accessed by immunoblot, mitochondrial DNA analysis, and confocal and electron microscopy. Effects of REEP6 KO on obesity-induced metabolic dysfunction were tested in a high-fat diet-induced obesity mouse model by glucose tolerance test, Western blot, and histological analyses. RESULTS REEP6 expression is highly enriched in murine adipocytes and is sharply upregulated upon adipocyte differentiation and by cold exposure. Inactivation of REEP6 in mice increased adiposity, and reduced energy expenditure and cold tolerance. REEP6 KO severely reduced protein kinase A-mediated signaling in BAT and greatly reduced mitochondrial mass. The effect of REEP6 inactivation on diminished β-adrenergic signaling was reproduced in cultured adipocytes, indicating that this effect is cell-autonomous. REEP6 KO also suppressed expression of adenylate cyclase 3 (Adcy3) in brown adipose tissue and knockdown of REEP6 in adipocytes reduced targeting of ADCY3 to the plasma membrane. Lastly, REEP6 KO exacerbated high-fat diet-induced insulin resistance and inflammation in adipose tissue. CONCLUSIONS This study indicates that REEP6 plays an important role in β-adrenergic signal transduction in adipocytes involving the expression and trafficking of Adcy3. Genetic inactivation of REEP6 reduces energy expenditure, increases adiposity, and the susceptibility to obesity-related metabolic dysfunction.
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Affiliation(s)
- Yeonho Son
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Cheoljun Choi
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Abhirup Saha
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Ji-Hyun Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeonyeong Im
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoon Keun Cho
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Je Kyung Seong
- Korea Mouse Phenotyping Center (KMPC), and Laboratory of Developmental Biology and Genomics, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Rayanne B Burl
- Center for Molecular Medicine and Genetics, and Center for Integrative Metabolic and Endocrine Research, Wayne State University School of Medicine, Detroit, MI, USA
| | - Elizabeth A Rondini
- Center for Molecular Medicine and Genetics, and Center for Integrative Metabolic and Endocrine Research, Wayne State University School of Medicine, Detroit, MI, USA
| | - James G Granneman
- Center for Molecular Medicine and Genetics, and Center for Integrative Metabolic and Endocrine Research, Wayne State University School of Medicine, Detroit, MI, USA
| | - Yun-Hee Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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