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Kang SA, Yu HS. Anti-obesity effects by parasitic nematode ( Trichinella spiralis) total lysates. Front Cell Infect Microbiol 2024; 13:1285584. [PMID: 38259965 PMCID: PMC10800963 DOI: 10.3389/fcimb.2023.1285584] [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: 08/30/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Background Obesity is an inducible factor for the cause of chronic diseases and is described by an increase in the size and number of adipocytes that differentiate from precursor cells (preadipocytes). Parasitic helminths are the strongest natural trigger of type 2 immune system, and several studies have showed that helminth infections are inversely correlated with metabolic syndromes. Methodology/Principal findings To investigate whether helminth-derived molecules have therapeutic effects on high-fat diet (HFD)-induced obesity, we isolated total lysates from Trichinella spiralis muscle larvae. We then checked the anti-obesity effect after intraperitoneal administration and intraoral administration of total lysate from T. spiralis muscle larvae in a diet-induced obesity model. T. spiralis total lysates protect against obesity by inhibiting the proinflammatory response and/or enhancing M2 macrophages. In addition, we determined the effects of total lysates from T. spiralis muscle larvae on anti-obesity activities in 3T3-L1 preadipocytes by investigating the expression levels of key adipogenic regulators, including peroxisome proliferator-activated receptor gamma (PPARγ), CCAAT-enhancer-binding protein alpha (C/EBPα) and adipocyte protein 2 (aP2). Oil Red O staining showed that the total lysates from T. spiralis muscle larvae decreased the differentiation of 3T3-L1 preadipocytes by decreasing the number of lipid droplets. In addition, the production levels of proinflammatory cytokines IL-1β, IL-6, IFN-γ and TNF-α were examined by enzyme-linked immunosorbent assay (ELISA). T. spiralis total lysates decreased intracellular lipid accumulation and suppressed the expression levels of PPARγ, C/EBPα and aP2. Conclusion/Significance These results show that T. spiralis total lysate significantly suppresses the symptoms of obesity in a diet- induced obesity model and 3T3-L1 cell differentiation and suggest that it has potential for novel anti-obesity therapeutics.
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Affiliation(s)
- Shin Ae Kang
- Department of Parasitology and Tropical Medicine, School of Medicine, Pusan National University, Yangsan, Republic of Korea
| | - Hak Sun Yu
- Department of Parasitology and Tropical Medicine, School of Medicine, Pusan National University, Yangsan, Republic of Korea
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
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2
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Gamwell JM, Paphiti K, Hodson L, Karpe F, Pinnick KE, Todorčević M. An optimised protocol for the investigation of insulin signalling in a human cell culture model of adipogenesis. Adipocyte 2023; 12:2179339. [PMID: 36763512 PMCID: PMC9980465 DOI: 10.1080/21623945.2023.2179339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
While there is no standardized protocol for the differentiation of human adipocytes in culture, common themes exist in the use of supra-physiological glucose and hormone concentrations, and an absence of exogenous fatty acids. These factors can have detrimental effects on some aspects of adipogenesis and adipocyte function. Here, we present methods for modifying the adipogenic differentiation protocol to overcome impaired glucose uptake and insulin signalling in human adipose-derived stem cell lines derived from the stromal vascular fraction of abdominal and gluteal subcutaneous adipose tissue. By reducing the length of exposure to adipogenic hormones, in combination with a physiological glucose concentration (5 mM), and the provision of exogenous fatty acids (reflecting typical dietary fatty acids), we were able to restore early insulin signalling events and glucose uptake, which were impaired by extended use of hormones and a high glucose concentration, respectively. Furthermore, the addition of exogenous fatty acids greatly increased the storage of triglycerides and removed the artificial demand to synthesize all fatty acids by de novo lipogenesis. Thus, modifying the adipogenic cocktail can enhance functional aspects of human adipocytes in vitro and is an important variable to consider prior to in vitro investigations into adipocyte biology.
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Affiliation(s)
- Jonathan M. Gamwell
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
| | - Keanu Paphiti
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
| | - Leanne Hodson
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
- NIHR Oxford Biomedical Research Centre, OUH Foundation Trust, Oxford, UK
| | - Fredrik Karpe
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
- NIHR Oxford Biomedical Research Centre, OUH Foundation Trust, Oxford, UK
| | - Katherine E. Pinnick
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
| | - Marijana Todorčević
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Headington, UK
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3
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Shinde AB, Nunn ER, Wilson GA, Chvasta MT, Pinette JA, Myers JW, Peck SH, Spinelli JB, Zaganjor E. Inhibition of nucleotide biosynthesis disrupts lipid accumulation and adipogenesis. J Biol Chem 2023; 299:104635. [PMID: 36963490 PMCID: PMC10149209 DOI: 10.1016/j.jbc.2023.104635] [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: 11/21/2022] [Revised: 02/21/2023] [Accepted: 03/13/2023] [Indexed: 03/26/2023] Open
Abstract
Energy balance and nutrient availability are key determinants of cellular decisions to remain quiescent, proliferate or differentiate into a mature cell. After assessing its environmental state, the cell must rewire its metabolism to support distinct cellular outcomes. Mechanistically, how metabolites regulate cell fate decisions is poorly understood. We used adipogenesis as our model system to ascertain the role of metabolism in differentiation. We isolated adipose tissue stromal vascular fraction (SVF) cells and profiled metabolites before and after adipogenic differentiation to identify metabolic signatures associated with these distinct cellular states. We found that differentiation alters nucleotide accumulation. Furthermore, inhibition of nucleotide biosynthesis prevented lipid storage within adipocytes and downregulated the expression of lipogenic factors. In contrast to proliferating cells, in which mTORC1 is activated by purine accumulation, mTORC1 signaling was unaffected by purine levels in differentiating adipocytes. Rather, our data indicated that purines regulate transcriptional activators of adipogenesis, PPARγ and C/EBPα to promote differentiation. Although de novo nucleotide biosynthesis has mainly been studied in proliferation, our study points to its requirement in adipocyte differentiation.
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Affiliation(s)
- Abhijit B Shinde
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Elizabeth R Nunn
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Genesis A Wilson
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Mathew T Chvasta
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Julia A Pinette
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Jacob W Myers
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Sun H Peck
- Department of Medicine, Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA; Nashville Veterans Affairs Medical Center, Department of Veterans Affairs, Nashville, TN, USA
| | - Jessica B Spinelli
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Elma Zaganjor
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, TN, USA; Vanderbilt Diabetes Research Center, Vanderbilt University, Nashville, TN, USA.
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4
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Li Y, Lee SH, Piao M, Kim HS, Lee KY. Metallothionein 3 Inhibits 3T3-L1 Adipocyte Differentiation via Reduction of Reactive Oxygen Species. Antioxidants (Basel) 2023; 12:antiox12030640. [PMID: 36978888 PMCID: PMC10045306 DOI: 10.3390/antiox12030640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Metallothionein 3 (MT3), also known as a neuronal growth-inhibitory factor, is a member of the metallothionein family and is involved in a variety of biological functions, including protection against metal toxicity and reactive oxygen species (ROS). However, less is known about the role of MT3 in the differentiation of 3T3-L1 cells into adipocytes. In this study, we observed that MT3 levels were downregulated during 3T3-L1 adipocyte differentiation. Mt3 overexpression inhibited adipocyte differentiation and reduced the levels of the adipogenic transcription factors C/EBPα and PPARγ. Further analyses showed that MT3 also suppressed the transcriptional activity of PPARγ, and this effect was not mediated by a direct interaction between MT3 with PPARγ. In addition, Mt3 overexpression resulted in a decrease in ROS levels during early adipocyte differentiation, while treatment with antimycin A, which induces ROS generation, restored the ROS levels. Mt3 knockdown, on the other hand, elevated ROS levels, which were suppressed upon treatment with the antioxidant N-acetylcysteine. Our findings indicate a previously unknown role of MT3 in the differentiation of 3T3-L1 cells into adipocytes and provide a potential novel target that might facilitate obesity treatment.
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Affiliation(s)
- Yuankuan Li
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sung Ho Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Meiyu Piao
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
- Correspondence: (H.S.K.); (K.Y.L.)
| | - Kwang Youl Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
- Correspondence: (H.S.K.); (K.Y.L.)
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5
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Abstract
Metabolic disorders related to obesity are largely dependent on adipose tissue hypertrophy, which involves adipocyte hypertrophy and increased adipogenesis. Adiposize is regulated by lipid accumulation as a result of increased lipogenesis (mainly lipid uptake in mature adipocytes) and reduced lipolysis. Using realtime 2D cell culture analyses of lipid uptake, we show (1) that high glucose concentration (4.5 g/L) was required to accumulate oleic acid increasing lipid droplet size until unilocularization similar to mature adipocytes in few days, (2) oleic acid reduced Peroxisome-Proliferator Activated Receptor Gamma (PPARG) gene transcription and (3) insulin counteracted oleic acid-induced increase of lipid droplet size. Although the lipolytic activity observed in high versus low glucose (1 g/L) conditions was not altered, insulin was found to inhibit oleic acid induced gene transcription required for lipid storage such as Cell Death Inducing DFFA Like Effectors (CIDEC) and G0S2 (G0 switch gene S2), possibly through PPARA activity. Although this signalling pathway requires more detailed investigation, the results point out the differential mechanisms involved in the pro-adipogenic effect of insulin in absence versus its protective effect on adiposity in presence of oleic acid uptake. Abbreviations: AICAR, 5-Aminoimidazole-4-carboxamide-1-D-ribofuranoside; AMPK, AMP-Activated protein kinase, ASCs, adipose stem cell; ATGL, adipose triglyceride lipase; BSA, Bovine serum albumin; CEBPA, CCAAT enhancer binding protein alpha; CIDEs, Cell Death Inducing DFFA Like Effectors; dA, differentiated adipocyte; DMEM, Dulbecco’s Modified Eagle’s Medium; FABPs, Fatty Acid Binding Proteins; FAT/CD36, Fatty acid translocase; FCS, Foetal calf serum; FN1, fibronectin 1; FFA, free fatty acid; G0S2, G0 switch gene S2; GLUTs, Glucose transporters; GPR120, G protein-coupled receptor 120; HG, high glucose; HSL, hormone sensitive lipase; INSR, insulin receptor; LG, low glucose; OA, oleic acid; PBS, Phosphate buffer saline; PPARs, Peroxisome-Proliferator Activated Receptors; PKA, Protein kinase cyclic AMP-dependent; PKG, Protein kinase cyclic GMP dependent; PTGS2, cytochrome oxidase 2; RTCA, realtime cell analysis; TG, triglyceride.
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Affiliation(s)
- Emmanuelle Berger
- University of Lyon, UMR Ecologie Microbienne Lyon (LEM), Research Team "Bacterial Opportunistic Pathogens and Environment" (BPOE), CNRS 5557, INRAE 1418, Université Claude Bernard Lyon 1, VetAgro Sup, 69622 Villeurbanne ou 69363 Lyon, France
| | - Alain Géloën
- University of Lyon, UMR Ecologie Microbienne Lyon (LEM), Research Team "Bacterial Opportunistic Pathogens and Environment" (BPOE), CNRS 5557, INRAE 1418, Université Claude Bernard Lyon 1, VetAgro Sup, 69622 Villeurbanne ou 69363 Lyon, France
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6
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Dinh TTT, Nguyen TT, Ngo HT, Tran TH, Le BV, Pham TH, Pham HTT, Pham TK, Do TH. Dammarane-type triterpenoids from Gynostemma compressum X. X. Chen & D. R. Liang (Cucurbitaceae) and their AMPK activation effect in 3T3-L1 cells. PHYTOCHEMISTRY 2022; 200:113218. [PMID: 35490775 DOI: 10.1016/j.phytochem.2022.113218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 04/07/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
Bioassay-guided fractionation of the 80% ethanol extract of Gynostemma compressum X. X. Chen & D. R. Liang (Cucurbitaceae) resulted in the isolation and identification of eight undescribed triterpenoids, gycomol VN1, gycomol VN2, and gycomosides VN1-6 from the bioactive n-butanol fraction. The structures of these compounds were elucidated by one- and two-dimensional nuclear magnetic resonance spectroscopy, high-resolution electrospray ionisation mass spectrometry, and chemical methods. All isolated compounds were evaluated for their 5'-adenosine monophosphate-activated protein kinase (AMPK) and acetyl-coenzyme A carboxylase (ACC) activation effects on 3T3-L1 cells. Importantly, gycomol VN2, gycomoside VN1, and gycomosides VN3-5 activated the phosphorylation of AMPK and its downstream substrate ACC in 3T3-L1 cells at a dose of 10 μM. These effects imply that the activation of AMPK and ACC by active compounds from G. compressum has considerable potential for the prevention of obesity and its related disorders by activating AMPK signaling pathways.
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Affiliation(s)
- Thi Thanh Thuy Dinh
- National Institute of Medicinal Materials (NIMM), 3B Quang Trung, Hoan Kiem, Hanoi, Viet Nam; National Hospital for Tropical Diseases, Dong Anh, Hanoi, Viet Nam
| | - Thi Thu Nguyen
- National Institute of Medicinal Materials (NIMM), 3B Quang Trung, Hoan Kiem, Hanoi, Viet Nam
| | - Huy Trung Ngo
- National Institute of Medicinal Materials (NIMM), 3B Quang Trung, Hoan Kiem, Hanoi, Viet Nam
| | - Thi Hien Tran
- Thai Binh University Medicine and Pharmacy, 373 Ly Bon, Thai Binh, Viet Nam
| | - Ba Vinh Le
- College of Pharmacy, Korea University, Sejong, 47236, Republic of Korea; Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), 18-Hoang Quoc Viet Cau Giay, Hanoi, Viet Nam
| | - Thanh Huyen Pham
- National Institute of Medicinal Materials (NIMM), 3B Quang Trung, Hoan Kiem, Hanoi, Viet Nam
| | - Ha Thanh Tung Pham
- Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam
| | - Thanh Ky Pham
- Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam
| | - Thi Ha Do
- National Institute of Medicinal Materials (NIMM), 3B Quang Trung, Hoan Kiem, Hanoi, Viet Nam.
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7
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Celik E, Ercin M, Bolkent S, Gezginci-Oktayoglu S. Metformin induces mitochondrial remodeling and differentiation of pancreatic progenitor cells into beta-cells by a potential mechanism including suppression of the T1R3, PLCβ2, cytoplasmic Ca +2, and AKT. J Physiol Biochem 2022; 78:869-883. [PMID: 35907121 DOI: 10.1007/s13105-022-00910-8] [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: 01/13/2022] [Accepted: 07/06/2022] [Indexed: 11/24/2022]
Abstract
The main goal of this study was to investigate the molecular changes in pancreatic progenitor cells subject to high glucose, aspartame, and metformin in vitro. This scope of work glucose, aspartame, and metformin were exposed to pancreatic islet derived progenitor cells (PID-PCs) for 10 days. GLUT1's role in beta-cell differentiation was examined by using GLUT1 inhibitor WZB117. Insulin+ cell ratio was measured by flow cytometry; the expression of beta-cell differentiation related genes was shown by RT-PCR; mitochondrial mass, mitochondrial ROS level, cytoplasmic Ca2+, glucose uptake, and metabolite analysis were made fluorometrically and spectrophotometrically; and proteins involved in related molecular pathways were determined by western blotting. Findings showed that glucose or aspartame exposed cells had similar metabolic and gene expression profile to control PID-PCs. Furthermore, relatively few insulin+ cells in aspartame treated cells were determined. Aspartame signal is transmitted through PLCβ2, CAMKK2 and LKB1 in PID-PCs. The most obvious finding of this study is that metformin significantly increased beta-cell differentiation. The mechanism involves suppression of the sweet taste signal's molecules T1R3, PLCβ2, cytoplasmic Ca+2, and AKT in addition to the direct effect of metformin on mitochondria and AMPK, and the energy metabolism of PID-PCs is remodelled in the direction of oxidative phosphorylation. These findings are very important in terms of determining that metformin stimulates the mitochondrial remodeling and the differentiation of PID-PCs to beta-cells and thus it may contribute to the compensation step, which is the first stage of diabetes development.
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Affiliation(s)
- Ertan Celik
- Molecular Biology Program, Biology Section, Institute of Science, Istanbul University, Istanbul, Turkey
| | - Merve Ercin
- Molecular Biology Program, Biology Section, Institute of Science, Istanbul University, Istanbul, Turkey.,Molecular Biology Section, Biology Department, Faculty of Science, Istanbul University, Vezneciler, 34134, Istanbul, Turkey
| | - Sehnaz Bolkent
- Molecular Biology Section, Biology Department, Faculty of Science, Istanbul University, Vezneciler, 34134, Istanbul, Turkey
| | - Selda Gezginci-Oktayoglu
- Molecular Biology Section, Biology Department, Faculty of Science, Istanbul University, Vezneciler, 34134, Istanbul, Turkey.
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8
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Pucci M, Mandrone M, Chiocchio I, Sweeney EM, Tirelli E, Uberti D, Memo M, Poli F, Mastinu A, Abate G. Different Seasonal Collections of Ficus carica L. Leaves Diversely Modulate Lipid Metabolism and Adipogenesis in 3T3-L1 Adipocytes. Nutrients 2022; 14:nu14142833. [PMID: 35889791 PMCID: PMC9323846 DOI: 10.3390/nu14142833] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/29/2022] [Accepted: 07/05/2022] [Indexed: 12/15/2022] Open
Abstract
Due to the high prevalence of obesity and type 2 diabetes, adipogenesis dysfunction and metabolic disorders are common features in the elderly population. Thus, the identification of novel compounds with anti-adipogenic and lipolytic effects is highly desirable to reduce diabetes complications. Plants represent an important source of bioactive compounds. To date, the antidiabetic potential of several traditional plants has been reported, among which Ficus carica L. is one of the most promising. Considering that plant metabolome changes in response to a number of factors including seasonality, the aim of this study was to evaluate whether Ficus carica leaves extracts collected in autumn (FCa) and spring (FCs) differently modulate lipid metabolism and adipogenesis in 3T3-L1 adipocytes. The 1H-NMR profile of the extracts showed that FCs have a higher content of caffeic acid derivatives, glucose, and sucrose than FCa. In contrast, FCa showed a higher concentration of malic acid and furanocoumarins, identified as psoralen and bergapten. In vitro testing showed that only FCa treatments were able to significantly decrease the lipid content (Ctrl vs. FCa 25 μg/mL, 50 μg/mL and 80 μg/mL; p < 0.05, p < 0.01 and p < 0.001, respectively). Furthermore, FCa treatments were able to downregulate the transcriptional pathway of adipogenesis and insulin sensitivity in 3T3-L1 adipocytes. In more detail, FCa 80 μg/mL significantly decreased the gene expression of PPARγ (p < 0.05), C/EBPα (p < 0.05), Leptin (p < 0.0001), adiponectin (p < 0.05) and GLUT4 (p < 0.01). In conclusion, this study further supports an in-depth investigation of F. carica leaves extracts as a promising source of active compounds useful for targeting obesity and diabetes.
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Affiliation(s)
- Mariachiara Pucci
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
| | - Manuela Mandrone
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Irnerio 42, 40126 Bologna, Italy; (M.M.); (I.C.); (F.P.)
| | - Ilaria Chiocchio
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Irnerio 42, 40126 Bologna, Italy; (M.M.); (I.C.); (F.P.)
| | - Eileen Mac Sweeney
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
| | - Emanuela Tirelli
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
| | - Daniela Uberti
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
| | - Maurizio Memo
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
| | - Ferruccio Poli
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Irnerio 42, 40126 Bologna, Italy; (M.M.); (I.C.); (F.P.)
| | - Andrea Mastinu
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
- Correspondence: ; Tel.: +39-030-371-7509
| | - Giulia Abate
- Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, 25123 Brescia, Italy; (M.P.); (E.M.S.); (E.T.); (D.U.); (M.M.); (G.A.)
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9
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Gayatri MB, Gajula NN, Chava S, Reddy ABM. High glutamine suppresses osteogenesis through mTORC1-mediated inhibition of the mTORC2/AKT-473/RUNX2 axis. Cell Death Discov 2022; 8:277. [PMID: 35672290 PMCID: PMC9174279 DOI: 10.1038/s41420-022-01077-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/21/2022] [Accepted: 05/30/2022] [Indexed: 11/09/2022] Open
Abstract
Activation of the key nutrient cellular sensors mTORC1 and mTORC2 directs the fate of mesenchymal stromal cells (MSCs). Here, we report that glutamine regulates crosstalk between mTOR complexes and lineage commitment of MSCs independent of glucose concentration. High glutamine-induced mTORC1 hyperactivation resulted in the suppression of mTORC2, which otherwise stabilizes RUNX2 via GSK3β inhibition through pAKT-473. Activation of GSK3β resulted in the ubiquitination of RUNX2, a key transcription factor for the osteogenic commitment of MSCs. However, low glutamine conditions inhibit mTORC1 hyperactivation followed by increased mTORC2 activation and RUNX2 stabilization. Under diabetic/high-glucose conditions, glutamine-triggered hyperactivation of mTORC1 resulted in mTORC2 suppression, and active GSK3β led to suppression of RUNX2. Activation of p-AMPK by metformin inhibits high glutamine-induced mTORC1 hyperactivation and rescues RUNX2 through the mTORC2/AKT-473 axis. Collectively, our study indicates the role of glutamine in modulating MSC fate through cross-talk between mTOR complexes by identifying a critical switch in signaling. It also shows the importance of glutamine in modulating molecular cues (mTORC1/p-70S6K/mTORC2/RUNX2) that are involved in driving diabetes-induced bone adipogenesis and other secondary complications.
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Affiliation(s)
- Meher Bolisetti Gayatri
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Navya Naidu Gajula
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Suresh Chava
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
- Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Aramati B M Reddy
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India.
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10
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Lee HS, Santana ÁL, Peterson J, Yucel U, Perumal R, De Leon J, Lee SH, Smolensky D. Anti-Adipogenic Activity of High-Phenolic Sorghum Brans in Pre-Adipocytes. Nutrients 2022; 14:nu14071493. [PMID: 35406112 PMCID: PMC9002988 DOI: 10.3390/nu14071493] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 02/04/2023] Open
Abstract
Obesity is one of the leading public health problems that can result in life-threatening metabolic and chronic diseases such as cardiovascular diseases, diabetes, and cancer. Sorghum (Sorghum bicolor (L.) Moench) is the fifth most important cereal crop in the world and certain genotypes of sorghum have high polyphenol content. PI570481, SC84, and commercially available sumac sorghum are high-polyphenol genotypes that have demonstrated strong anti-cancer activities in previous studies. The objective of this study was to explore a potential anti-obesity use of extracts from sorghum bran in the differentiation of 3T3-L1 preadipocytes and to investigate cellular and molecular responses in differentiated adipocytes to elucidate related mechanisms. None of the four different sorghum bran extracts (PI570481, SC84, Sumac, and white sorghum as a low-polyphenol control) caused cytotoxicity in undifferentiated and differentiated 3T3-L1 cells at doses used in this study. Sorghum bran extracts (PI570481, SC84, and Sumac) reduced intracellular lipid accumulation and expression of adipogenic and lipogenic proteins in a dose-dependent manner in differentiated 3T3-L1 cells. The same polyphenol containing sorghum bran extracts also repressed production of reactive oxygen species (ROS) and MAPK signaling pathways and repressed insulin signaling and glucose uptake in differentiated 3T3-L1 cells. These data propose a potential use of high-phenolic sorghum bran for the prevention of obesity.
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Affiliation(s)
- Hee-Seop Lee
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA;
| | - Ádina L. Santana
- Department of Animal Sciences and Industry, Food Science Institute, Kansas State University, Manhattan, KS 66503, USA; (Á.L.S.); (J.P.); (U.Y.)
| | - Jaymi Peterson
- Department of Animal Sciences and Industry, Food Science Institute, Kansas State University, Manhattan, KS 66503, USA; (Á.L.S.); (J.P.); (U.Y.)
| | - Umut Yucel
- Department of Animal Sciences and Industry, Food Science Institute, Kansas State University, Manhattan, KS 66503, USA; (Á.L.S.); (J.P.); (U.Y.)
| | - Ramasamy Perumal
- Agricultural Research Center, Department of Agronomy, Kansas State University, Hays, KS 67601, USA;
| | - Joaquin De Leon
- Grain Quality and Structure Research Unit, United State Department of Agriculture, Agricultural Research Service, Manhattan, KS 66502, USA;
| | - Seong-Ho Lee
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA;
- Correspondence: (S.-H.L.); (D.S.); Tel.: +1-301-405-4532 (S.-H.L.); +1-785-537-5546 (D.S.)
| | - Dmitriy Smolensky
- Grain Quality and Structure Research Unit, United State Department of Agriculture, Agricultural Research Service, Manhattan, KS 66502, USA;
- Correspondence: (S.-H.L.); (D.S.); Tel.: +1-301-405-4532 (S.-H.L.); +1-785-537-5546 (D.S.)
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11
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Nunn ER, Shinde AB, Zaganjor E. Weighing in on Adipogenesis. Front Physiol 2022; 13:821278. [PMID: 35283790 PMCID: PMC8914022 DOI: 10.3389/fphys.2022.821278] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/20/2022] [Indexed: 12/13/2022] Open
Abstract
Obesity is a growing health concern worldwide because of its contribution to metabolic syndrome, type II diabetes, insulin resistance (IR), and numerous cancers. In obesity, white adipose tissue (WAT) expands through two mechanisms: increase in adipocyte cell number by precursor cell differentiation through the process of adipogenesis (hyperplasia) and increase in existing mature adipocyte cell size (hypertrophy). While hypertrophy is associated with the negative effects of obesity on metabolic health, such as inflammation and lipotoxicity, adipogenesis prevents obesity-mediated metabolic decline. Moreover, in metabolically healthy obesity adipogenesis is increased. Thus, it is vital to understand the mechanistic basis for adipose expansion to inform novel therapeutic approaches to mitigate the dysfunction of this tissue and associated diseases. In this mini-review, we summarize recent studies on the regulation of adipogenesis and provide a perspective on targeting adipogenesis as a potential therapeutic avenue for metabolic disorders.
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12
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Grigorova N, Ivanova Z, Vachkova E, Tacheva T, Penchev Georgiev I. Co-administration of oleic and docosahexaenoic acids enhances glucose uptake rather than lipolysis in mature 3T3-L1 adipocytes cell culture. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2022. [DOI: 10.15547/bjvm.2390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study investigated the effect of different types of long-chain fatty acids and their combination on the triglyceride accumulation, glucose utilisation, and lipolysis in already obese adipocytes. 3T3-L1 MBX cells were first differentiated into mature adipocytes using adipogenic inducers (3-isobutyl-1-methylxanthine, dexamethasone, indomethacin, insulin, and high glucose), then 100 µM 0.1% ethanol extracts of palmitic (PA), oleic (OA), or docosahexaenoic acid (DHA) were applied for nine days. Unsaturated fatty acids decreased the intracellular lipid accumulation while maintaining glucose utilisation levels. However, unlike OA, self-administration of DHA only intensified lipolysis by 25% vs induced untreated control (IC), which may have a direct detrimental impact on the whole body’s metabolic state. DHA applied in equal proportion with PA elevated triglyceride accumulation by 10% compared to IC, but applied with OA, enhanced glucose uptake without any significant changes in the lipogenic drive and the lipolytic rate, suggesting that this unsaturated fatty acids combination may offer a considerable advantage in amelioration of obesity-related disorders.
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Affiliation(s)
- N. Grigorova
- Department of Animal Physiology, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
| | - Zh. Ivanova
- Department of Animal Physiology, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
| | - E. Vachkova
- Department of Animal Physiology, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
| | - T. Tacheva
- Department of Biochemistry, Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria
| | - I. Penchev Georgiev
- Department of Animal Physiology, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
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13
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Effect of Metformin and Simvastatin in Inhibiting Proadipogenic Transcription Factors. Curr Issues Mol Biol 2021; 43:2082-2097. [PMID: 34940118 PMCID: PMC8929042 DOI: 10.3390/cimb43030144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/13/2021] [Accepted: 11/18/2021] [Indexed: 12/12/2022] Open
Abstract
Obesity is a multifactorial chronic disease characterized by the excessive accumulation of fat in adipose tissue driven by hypertrophy and hyperplasia of adipocytes through adipogenesis. Adipogenesis plays a key role in the development of obesity and related metabolic disorders, which makes it potential target for the therapeutic approach to obesity. An increasing number of studies confirm the pleiotropic action of the combined treatment with metformin and statins, suggesting their anti-hypertensive, anti-inflammatory, and anti-adipogenic effect. The aim of this study was to analyze the effect of different doses of metformin (MET) and simvastatin (SIM) on the expression of key transcription factors of adipogenesis. Mouse 3T3-L1 preadipocytes were induced to differentiation in adipogenic medium with sustained MET and SIM treatment to assess the effect on adipogenesis. Nine days after initiating adipogenesis, the cells were prepared for further experiments, including Oil Red O staining, RT-PCR, Western blotting, and immunocytochemistry. Treating the cells with the combination of MET and SIM slightly reduced the intensity of Oil Red O staining compared with the control group, and down-regulated mRNA and protein expression of PPARγ, C/EBPα, and SREBP-1C. In conclusion, the inhibitory effect of MET and SIM on adipocyte differentiation, as indicated by decreased lipid accumulation, appears to be mediated through the down-regulation of adipogenic transcription factors, peroxisome proliferator-activated receptor γ (PPARγ), CCAAT/enhancer binding pro-tein α (C/EBPα), and sterol regulatory element-binding protein 1 (SREBP-1C).
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14
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Rosita R, Yueniwati Y, Endharti AT, Widodo MA. High-Glucose and Free Fatty Acid-Induced Adipocytes Generate Increasing of HMGB1 and Reduced GLUT4 Expression. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.7199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background
High-mobility group box 1 protein (HMGB1) is released from necrotic adipocytes into the extracellular milieu as an inflammatory alarmin in obesity. Although the impact of excess nutrient on adipocytes is well known, it is not clear how specific its component drive cell-size and damaged of adipocytes, and how this relates to the risk of insulin resistance.
Objectives
The aim of this study was to determine HMGB1 level in adipocytes cultures after high glucose and/or FFA exposures and to assess GLUT4 expression. We determined cellular features of adipocytes that correlates to HMGB1 released and insulin resistance.
Methods
Differentiated adipocytes were exposed to high glucose and/or FFAs for 7 days. ELISA was performed on supernatant to assess the HMGB1 level. Total GLUT4 expression were quantified by immunofluorescense.
Results
High glucose and FFA-exposed cells have significant increase of HMGB1 level with decreased of cell size and necrotic adipocytes features. The total GLUT4 were reduced in HG-cells (p <0,045), but not in FFA cells. Hypertrophic adipocytes (p <0.05) and slight decrease of GLUT4 expression were showed on HG+FFA exposures with no increase of HMGB1 level. There was a significant correlation between cell size and HMGB1 level (R -0,637, p < 0.026)
Conclusion
The expression level studies between high glucose, FFA, and a combination of both on adipocytes results strongly suggest that high glucose is more damaging to adipocyte compared to FFA. Nevertheless, the combination of the two causes adipocyte dysfunction with general features of adipose tissue in obesity, suggested it can be used as a hypertrophic adipocytes model to study obesity in vitro.
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15
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Castelli V, Brandolini L, d’Angelo M, Giorgio C, Alfonsetti M, Cocchiaro P, Lombardi F, Cimini A, Allegretti M. CXCR1/2 Inhibitor Ladarixin Ameliorates the Insulin Resistance of 3T3-L1 Adipocytes by Inhibiting Inflammation and Improving Insulin Signaling. Cells 2021; 10:cells10092324. [PMID: 34571976 PMCID: PMC8471705 DOI: 10.3390/cells10092324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/25/2021] [Accepted: 08/29/2021] [Indexed: 01/02/2023] Open
Abstract
Type 2 diabetes mellitus is a severe public health issue worldwide. It displays a harmful effect on different organs as the eyes, kidneys and neural cells due to insulin resistance and high blood glucose concentrations. To date, the available treatments for this disorder remain limited. Several reports have correlated obesity with type 2 diabetes. Mainly, dysfunctional adipocytes and the regulation of high secretion of inflammatory cytokines are the crucial links between obesity and insulin resistance. Several clinical and epidemiological studies have also correlated the onset of type 2 diabetes with inflammation, which is now indicated as a new target for type 2 diabetes treatment. Thus, it appears essential to discover new drugs able to inhibit the secretion of proinflammatory adipocytokines in type 2 diabetes. Adipocytes produce inflammatory cytokines in response to inflammation or high glucose levels. Once activated by a specific ligand, CXCR1 and CXCR2 mediate some cytokines’ effects by activating an intracellular signal cascade once activated by a specific ligand. Therefore, it is conceivable to hypothesize that a specific antagonist of these receptors may ameliorate type 2 diabetes and glucose metabolism. Herein, differentiated 3T3-L1-adipocytes were subjected to high glucose or inflammatory conditions or the combination of both and then treated with ladarixin, a CXCR1/2 inhibitor. The results obtained point towards the positive regulation by ladarixin on insulin sensitivity, glucose transporters GLUT1 and GLUT4, cytokine proteome profile and lipid metabolism, thus suggesting ladarixin as a potentially helpful treatment in type 2 diabetes mellitus and obesity.
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Affiliation(s)
- Vanessa Castelli
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (V.C.); (M.d.); (M.A.); (F.L.)
| | - Laura Brandolini
- Dompè Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (L.B.); (C.G.); (P.C.)
| | - Michele d’Angelo
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (V.C.); (M.d.); (M.A.); (F.L.)
| | - Cristina Giorgio
- Dompè Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (L.B.); (C.G.); (P.C.)
| | - Margherita Alfonsetti
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (V.C.); (M.d.); (M.A.); (F.L.)
| | - Pasquale Cocchiaro
- Dompè Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (L.B.); (C.G.); (P.C.)
| | - Francesca Lombardi
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (V.C.); (M.d.); (M.A.); (F.L.)
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (V.C.); (M.d.); (M.A.); (F.L.)
- Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA 19122, USA
- Correspondence: (A.C.); (M.A.)
| | - Marcello Allegretti
- Dompè Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (L.B.); (C.G.); (P.C.)
- Correspondence: (A.C.); (M.A.)
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16
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Griesel BA, Matsuzaki S, Batushansky A, Griffin TM, Humphries KM, Olson AL. PFKFB3-dependent glucose metabolism regulates 3T3-L1 adipocyte development. FASEB J 2021; 35:e21728. [PMID: 34110658 PMCID: PMC8205188 DOI: 10.1096/fj.202100381rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/08/2021] [Accepted: 05/25/2021] [Indexed: 11/11/2022]
Abstract
Proliferation and differentiation of preadipocytes, and other cell types, is accompanied by an increase in glucose uptake. Previous work showed that a pulse of high glucose was required during the first 3 days of differentiation in vitro, but was not required after that. The specific glucose metabolism pathways required for adipocyte differentiation are unknown. Herein, we used 3T3-L1 adipocytes as a model system to study glucose metabolism and expansion of the adipocyte metabolome during the first 3 days of differentiation. Our primary outcome measures were GLUT4 and adiponectin, key proteins associated with healthy adipocytes. Using complete media with 0 or 5 mM glucose, we distinguished between developmental features that were dependent on the differentiation cocktail of dexamethasone, insulin, and isobutylmethylxanthine alone or the cocktail plus glucose. Cocktail alone was sufficient to activate the capacity for 2-deoxglucose uptake and glycolysis, but was unable to support the expression of GLUT4 and adiponectin in mature adipocytes. In contrast, 5 mM glucose in the media promoted a transient increase in glucose uptake and glycolysis as well as a significant expansion of the adipocyte metabolome and proteome. Using genetic and pharmacologic approaches, we found that the positive effects of 5 mM glucose on adipocyte differentiation were specifically due to increased expression of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3), a key regulator of glycolysis and the ancillary glucose metabolic pathways. Our data reveal a critical role for PFKFB3 activity in regulating the cellular metabolic remodeling required for adipocyte differentiation and maturation.
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Affiliation(s)
- Beth A Griesel
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | | | | | - Timothy M Griffin
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Kenneth M Humphries
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Ann Louise Olson
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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17
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Wróblewski A, Strycharz J, Świderska E, Balcerczyk A, Szemraj J, Drzewoski J, Śliwińska A. Chronic and Transient Hyperglycemia Induces Changes in the Expression Patterns of IL6 and ADIPOQ Genes and Their Associated Epigenetic Modifications in Differentiating Human Visceral Adipocytes. Int J Mol Sci 2021; 22:ijms22136964. [PMID: 34203452 PMCID: PMC8268546 DOI: 10.3390/ijms22136964] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022] Open
Abstract
Adipokines secreted by hypertrophic visceral adipose tissue (VAT) instigate low-grade inflammation, followed by hyperglycemia (HG)-related metabolic disorders. The latter may develop with the participation of epigenetic modifications. Our aim was to assess how HG influences selected epigenetic modifications and the expression of interleukin 6 (IL-6) and adiponectin (APN; gene symbol ADIPOQ) during the adipogenesis of human visceral preadipocytes (HPA-v). Adipocytes (Ads) were chronically or transiently HG-treated during three stages of adipogenesis (proliferation, differentiation, maturation). We measured adipokine mRNA, protein, proven or predicted microRNA expression (RT-qPCR and ELISA), and enrichment of H3K9/14ac, H3K4me3, and H3K9me3 at gene promoter regions (chromatin immunoprecipitation). In chronic HG, we detected different expression patterns of the studied adipokines at the mRNA and protein levels. Chronic and transient HG-induced changes in miRNA (miR-26a-5p, miR-26b-5p, let-7d-5p, let-7e-5p, miR-365a-3p, miR-146a-5p) were mostly convergent to altered IL-6 transcription. Alterations in histone marks at the IL6 promoter were also in agreement with IL-6 mRNA. The open chromatin marks at the ADIPOQ promoter mostly reflected the APN transcription during NG adipogenesis, while, in the differentiation stage, HG-induced changes in all studied marks were in line with APN mRNA levels. In summary, HG dysregulated adipokine expression, promoting inflammation. Epigenetic changes coexisted with altered expression of adipokines, especially for IL-6; therefore, epigenetic marks induced by transient HG may act as epi-memory in Ads. Such changes in the epigenome and expression of adipokines could be instrumental in the development of inflammation and metabolic deregulation of VAT.
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Affiliation(s)
- Adam Wróblewski
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
- Correspondence: (A.W.); (A.Ś.)
| | - Justyna Strycharz
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Ewa Świderska
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Aneta Balcerczyk
- Department of Molecular Biophysics, University of Lodz, 90-236 Lodz, Poland;
| | - Janusz Szemraj
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland; (J.S.); (E.Ś.); (J.S.)
| | - Józef Drzewoski
- Central Teaching Hospital of the Medical University of Lodz, 92-213 Lodz, Poland;
| | - Agnieszka Śliwińska
- Department of Nucleic Acids Biochemistry, Medical University of Lodz, 92-213 Lodz, Poland
- Correspondence: (A.W.); (A.Ś.)
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18
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Dogra S, Neelakantan D, Patel MM, Griesel B, Olson A, Woo S. Adipokine Apelin/APJ Pathway Promotes Peritoneal Dissemination of Ovarian Cancer Cells by Regulating Lipid Metabolism. Mol Cancer Res 2021; 19:1534-1545. [PMID: 34172534 DOI: 10.1158/1541-7786.mcr-20-0991] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 04/05/2021] [Accepted: 05/11/2021] [Indexed: 11/16/2022]
Abstract
Adipose tissue, which can provide adipokines and nutrients to tumors, plays a key role in promoting ovarian cancer metastatic lesions in peritoneal cavity. The adipokine apelin promotes ovarian cancer metastasis and progression through its receptor APJ, which regulates cell proliferation, energy metabolism, and angiogenesis. The objective of this study was to investigate the functional role and mechanisms of the apelin-APJ pathway in ovarian cancer metastasis, especially in context of tumor cell-adipocyte interactions. When co-cultured in the conditioned media (AdipoCM) derived from 3T3-L1 adipocytes, which express and secrete high apelin, human ovarian cancer cells with high APJ expression showed significant increases in migration and invasion in vitro. We also found that cells expressing high levels of APJ had increased cell adhesion to omentum ex vivo, and preferentially "home-in" on the omentum in vivo. These apelin-induced pro-metastatic effects were reversed by APJ antagonist F13A in a dose-dependent manner. Apelin-APJ activation increased lipid droplet accumulation in ovarian cancer cells, which was further intensified in the presence of AdipoCM and reversed by F13A or APJ knockdown. Mechanistically, this increased lipid uptake was mediated by CD36 upregulation via APJ-STAT3 activation, and the lipids were utilized in promoting fatty acid oxidation via activation of AMPK-CPT1a axis. Together, our studies demonstrate that adipocyte-derived apelin activates APJ-expressing tumor cells in a paracrine manner, promoting lipid uptake and utilization and providing energy for ovarian cancer cell survival at the metastatic sites. Hence, the apelin-APJ pathway presents a novel therapeutic target to curb ovarian cancer metastasis. IMPLICATIONS: Targeting the APJ pathway in high-grade serous ovarian carcinoma is a novel strategy to inhibit peritoneal metastasis.
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Affiliation(s)
- Samrita Dogra
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Deepika Neelakantan
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Maulin M Patel
- Department of Cell Biology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
- Cardiovascular Biology Department, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Beth Griesel
- Department of Biochemistry and Molecular Biology, College of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Ann Olson
- Department of Biochemistry and Molecular Biology, College of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Sukyung Woo
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
- Peggy and Charles Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, New York
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19
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Tyrosol May Prevent Obesity by Inhibiting Adipogenesis in 3T3-L1 Preadipocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:4794780. [PMID: 33376578 PMCID: PMC7746459 DOI: 10.1155/2020/4794780] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/08/2020] [Accepted: 11/19/2020] [Indexed: 02/07/2023]
Abstract
Tyrosol (TR), a major polyphenol found in extra virgin olive oil (EVOO), exerts several antioxidant effects. However, only scarce evidences are present regarding its activity on adipocytes and obesity. This study evaluated the role of TR in adipogenesis. Murine 3T3-L1 preadipocytes were incubated with TR (300 and 500 μM), and TR administration inhibited adipogenesis by downregulation of several adipogenic factors (leptin and aP2) and transcription factors (C/EBPα, PPARγ, SREBP1c, and Glut4) and by modulation of the histone deacetylase sirtuin 1. After complete differentiation, adipocytes treated with 300 and 500 μM TR showed a reduction of 20% and 30% in lipid droplets, respectively. Intracellular triglycerides were significantly reduced after TR treatment (p < 0.05). Mature adipocytes treated with TR at 300 and 500 μM showed a marked decrease in the inflammatory state and oxidative stress as shown by the modulation of specific biomarkers (TNF, IL6, ROS, and SOD2). TR treatment also acted on the early stage of differentiation by reducing cell proliferation (~40%) and inducing cell cycle arrest during Mitotic Expansion Clonal (first 48 h of differentiation), as shown by the increase in both S1 phase and p21 protein expression. We also showed that TR induced lipolysis by activating the AMPK-ATGL-HSL pathway. In conclusion, we provided evidence that TR reduces 3T3-L1 differentiation through downregulation of adipogenic proteins, inflammation, and oxidative stress. Moreover, TR may trigger adipose tissue browning throughout the induction of the AMPK-ATGL-UCP1 pathway and, subsequently, may have promise as a potential therapeutic agent for the treatment and prevention of obesity.
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20
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Wang G, Wu B, Xu W, Jin X, Wang K, Wang H. The Inhibitory Effects of Juglanin on Adipogenesis in 3T3-L1 Adipocytes. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:5349-5357. [PMID: 33293796 PMCID: PMC7719332 DOI: 10.2147/dddt.s256504] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022]
Abstract
Introduction Deregulation of adipogenesis plays an important role in obesity and other metabolism disorders. PPAR, C/EBP and SREBP1c are key transcriptional factors involved in adipogenesis and lipogenesis. Juglanin is a natural compound belonging to flavonoids, and it has been reported that juglanin has a potent inhibitory effect on inflammation and certain type of cancers. However, the effects of juglanin in adipogenesis have not been reported before. Materials and Methods 3T3-L1 preadipocytes were incubated with differentiation induction medium in the presence or absence of 0.5, 2.5, or 5 µM juglanin for an 8-day differentiation period. The lipid droplets accumulated in the cytoplasm were monitored by Oil Red O staining on days 0, 2, 5, and 8. The regulatory effects of juglanin on adipogenesis-related genes and proteins were investigated by real-time polymerase chain reaction and Western blot analysis. Results Juglanin significantly decreased lipid accumulation in differentiated adipocytes. Our findings show that juglanin reduced the expression of C/EBPα, C/EBPβ, and SREBP-1c without affecting PPARα or PPARγ expression. Additionally, juglanin increased the activation of the SIRT1/AMPK signaling pathway through the phosphorylation of AMPKα. Finally, we performed an AMPK inhibitor experiment, which revealed that the inhibitory effects of juglanin on adipogenesis are mediated through AMPK. Discussion Juglanin can prevent adipogenesis by suppressing lipid accumulation and the differentiation of preadipocytes. The mechanism of juglanin regulating adipogenesis requires further investigation. Future clinical study in vivo could shed more light on its implication in modulating obesity and metabolic disorders.
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Affiliation(s)
- Guang Wang
- Department of Intensive Care Unit, The First Hospital of Jilin University, Changchun, Jilin 130033, People's Republic of China
| | - Bing Wu
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, People's Republic of China
| | - Wenzhou Xu
- Department of Periodontology, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130033, People's Republic of China
| | - Xuefei Jin
- Department of Urology, China-Japan Union Hospital of Jilin University, Jilin Key Laboratory of Urologic Oncology, Changchun, Jilin 130033, People's Republic of China
| | - Kun Wang
- Department of Obstetrics and Gynecology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, People's Republic of China
| | - Heyuan Wang
- Department of Endocrinology and Metabolism, The First Hospital of Jilin University, Changchun, Jilin 130033, People's Republic of China
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21
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Wang L, Song C, Wang N, Li S, Liu Q, Sun Z, Wang K, Yu SC, Yang Q. NADP modulates RNA m 6A methylation and adipogenesis via enhancing FTO activity. Nat Chem Biol 2020; 16:1394-1402. [PMID: 32719557 DOI: 10.1038/s41589-020-0601-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 05/11/2020] [Accepted: 06/24/2020] [Indexed: 12/28/2022]
Abstract
Metabolism is often regulated by the transcription and translation of RNA. In turn, it is likely that some metabolites regulate enzymes controlling reversible RNA modification, such as N6-methyladenosine (m6A), to modulate RNA. This hypothesis is at least partially supported by the findings that multiple metabolic diseases are highly associated with fat mass and obesity-associated protein (FTO), an m6A demethylase. However, knowledge about whether and which metabolites directly regulate m6A remains elusive. Here, we show that NADP directly binds FTO, independently increases FTO activity, and promotes RNA m6A demethylation and adipogenesis. We screened a set of metabolites using a fluorescence quenching assay and NADP was identified to remarkably bind FTO. In vitro demethylation assays indicated that NADP enhances FTO activity. Furthermore, NADP regulated mRNA m6A via FTO in vivo, and deletion of FTO blocked NADP-enhanced adipogenesis in 3T3-L1 preadipocytes. These results build a direct link between metabolism and RNA m6A demethylation.
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MESH Headings
- 3T3-L1 Cells
- Adenosine/analogs & derivatives
- Adenosine/metabolism
- Adipocytes/cytology
- Adipocytes/drug effects
- Adipocytes/enzymology
- Adipogenesis/drug effects
- Adipogenesis/genetics
- AlkB Homolog 5, RNA Demethylase/antagonists & inhibitors
- AlkB Homolog 5, RNA Demethylase/genetics
- AlkB Homolog 5, RNA Demethylase/metabolism
- Alpha-Ketoglutarate-Dependent Dioxygenase FTO/genetics
- Alpha-Ketoglutarate-Dependent Dioxygenase FTO/metabolism
- Animals
- Binding Sites
- Cell Differentiation/drug effects
- Demethylation
- Enzyme Assays
- Gene Deletion
- Gene Expression Regulation
- HEK293 Cells
- High-Throughput Screening Assays
- Humans
- Kinetics
- Methyltransferases/antagonists & inhibitors
- Methyltransferases/genetics
- Methyltransferases/metabolism
- Mice
- Mice, Inbred C57BL
- Models, Molecular
- NADP/metabolism
- NADP/pharmacology
- Protein Binding
- Protein Structure, Secondary
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
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Affiliation(s)
- Lina Wang
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Chengli Song
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Na Wang
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Songyu Li
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Qiaoling Liu
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Zhen Sun
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Kai Wang
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China
| | - Shi-Cang Yu
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Qingkai Yang
- Institute of Cancer Stem Cell, DaLian Medical University, Dalian, Liaoning, China.
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22
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Wang T, Wang J, Hu X, Huang XJ, Chen GX. Current understanding of glucose transporter 4 expression and functional mechanisms. World J Biol Chem 2020; 11:76-98. [PMID: 33274014 PMCID: PMC7672939 DOI: 10.4331/wjbc.v11.i3.76] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/22/2020] [Accepted: 09/22/2020] [Indexed: 02/05/2023] Open
Abstract
Glucose is used aerobically and anaerobically to generate energy for cells. Glucose transporters (GLUTs) are transmembrane proteins that transport glucose across the cell membrane. Insulin promotes glucose utilization in part through promoting glucose entry into the skeletal and adipose tissues. This has been thought to be achieved through insulin-induced GLUT4 translocation from intracellular compartments to the cell membrane, which increases the overall rate of glucose flux into a cell. The insulin-induced GLUT4 translocation has been investigated extensively. Recently, significant progress has been made in our understanding of GLUT4 expression and translocation. Here, we summarized the methods and reagents used to determine the expression levels of Slc2a4 mRNA and GLUT4 protein, and GLUT4 translocation in the skeletal muscle, adipose tissues, heart and brain. Overall, a variety of methods such real-time polymerase chain reaction, immunohistochemistry, fluorescence microscopy, fusion proteins, stable cell line and transgenic animals have been used to answer particular questions related to GLUT4 system and insulin action. It seems that insulin-induced GLUT4 translocation can be observed in the heart and brain in addition to the skeletal muscle and adipocytes. Hormones other than insulin can induce GLUT4 translocation. Clearly, more studies of GLUT4 are warranted in the future to advance of our understanding of glucose homeostasis.
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Affiliation(s)
- Tiannan Wang
- Department of Nutrition, The University of Tennessee, Knoxville, TN 37996, United States
| | - Jing Wang
- College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Xinge Hu
- Department of Nutrition, The University of Tennessee, Knoxville, TN 37996, United States
| | - Xian-Ju Huang
- College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Guo-Xun Chen
- Department of Nutrition, The University of Tennessee, Knoxville, TN 37996, United States
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23
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Shyni GL, Sajin KF, Mangalam SN, Raghu KG. An in vitro study reveals the anti-obesity effects of 7- methoxy-3-methyl-5-((E)-prop-1-enyl)-2-(3,4,5-trimethoxyphenyl)-2,3-dihydrobenzofuran from Myristica fragrans. Eur J Pharmacol 2020; 891:173686. [PMID: 33121949 DOI: 10.1016/j.ejphar.2020.173686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 11/29/2022]
Abstract
Adipogenesis, the maturation process of preadipocytes, is closely associated with the development of obesity and other complex metabolic syndromes. Herein, we investigated the effect of 7- methoxy-3-methyl-5-((E)- prop-1-enyl)-2-(3,4,5-trimethoxyphenyl)-2,3-dihydrobenzofuran (TM), a benzofuran, isolated from the mace of Myristica fragrans Houtt on adipogenesis in 3T3-L1 preadipocytes to extrapolate whether this compound has any anti-obesity potential. For this, 3T3-L1 preadipocytes were induced to differentiate in the presence of various concentrations of TM (1, 5, 10 μM) and analyzed for triglyceride (TG) accumulation and the expression of proteins and genes involved in lipogenesis and lipolysis associated with adipogenesis. Results showed that TM significantly reduced TG accumulation and expression of marker proteins of adipocyte differentiation (peroxisome proliferator-activated receptor γ, CCAAT/enhancer-binding protein α, and fatty acid-binding protein 4) and increased the secretion of glycerol in a dose-dependent manner. There was a significant dose-dependent decrease in the expression of fatty acid synthase, stearoyl-CoA desaturase-1, sterol regulatory element-binding transcription factor 1c, and acetyl-CoA carboxylase 1 and an increase in carnitine palmitoyltransferase 1, acyl-CoA oxidase, and peroxisome proliferator-activated receptor α in TM treated cells. The phosphorylation of cAMP-activated protein kinase was also increased, which in turn activated the phosphorylation of acetyl-CoA carboxylase in mature adipocytes. Also, there was an increase in glucose uptake by TM, suggesting its insulin-sensitizing potential. This is the first report on the anti-obesity effects of TM from Myristica fragrans on adipogenesis and lipid metabolism in 3T3-L1 adipocytes and demands detailed in vivo study for developing TM as anti-obesity therapeutics.
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Affiliation(s)
- Gangadharan Leela Shyni
- Biochemistry and Molecular Mechanism Laboratory, Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India
| | - Kaithathara Francis Sajin
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India
| | - Sivasankaran Nair Mangalam
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India
| | - Kozhiparambil Gopalan Raghu
- Biochemistry and Molecular Mechanism Laboratory, Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, 695019, India.
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24
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Hengpratom T, Lowe GM, Eumkeb G. An insight into anti-adipogenic properties of an Oroxylum indicum (L.) Kurz extract. BMC Complement Med Ther 2020; 20:319. [PMID: 33081786 PMCID: PMC7576871 DOI: 10.1186/s12906-020-03111-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/08/2020] [Indexed: 11/23/2022] Open
Abstract
Background Oroxylum indicum fruit extract (OIE) has been reported to inhibit the development of adipocytes. However, the exact mechanism of its metabolic activity is not clearly defined. This study attempted to investigate whether OIE was involved in disrupting the cell cycle, glucose metabolism, and mitochondrial function in 3 T3-L1 cells. Methods The effect of the OIE on cell cycle progression was measured by flow cytometry along with observing the expression of the cycle regulator by immunoblotting. The effect of the OIE on glucose metabolism was investigated. The amount of glucose uptake (2-NBDG) influenced by insulin was determined as well as the protein tyrosine phosphorylation (PY20), and glucose transporter4 (GLUT4) expression was determined by immunoblotting assay. Mitochondria are also essential to metabolic processes. This study investigated mitochondrial activity using fluorescent lipophilic carbocyanine dye (JC-1) and mitochondria mass by MitoTracker Green (MTG) staining fluorescence dyes. Finally, cellular ATP concentration was measured using an ATP chemiluminescence assay. Results Treatment with OIE plus adipogenic stimulators for 24 h arrested cell cycle progression in the G2/M phase. Moreover, 200 μg/mL of OIE significantly diminished the expression of the insulin receptor (IR) and GLUT4 protein compared to the untreated-adipocytes (P < 0.05). The mitochondrial membrane potential (MMP) was significantly reduced (24 h) and increased (day 12) by OIE compared to untreated-adipocytes (P < 0.05). However, OIE maintained MMP and ATP at a similar level compared to the pre-adipocytes (day 12). Transmission electron microscope (TEM) results demonstrated that OIE could protect mitochondria deformation compared to the untreated-adipocytes. Conclusion These results suggest that the inhibitory effect of the OIE on adipogenesis may potentially inhibit the cell cycle and phosphorylation of IR, leading to a decrease in glucose uptake to the cells. The OIE also slows down the mitochondrial activity of the early phase of cell differentiation, which can also inhibit the development of fat cells. Supplementary information The online version contains supplementary material available at 10.1186/s12906-020-03111-2.
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Affiliation(s)
- Tanaporn Hengpratom
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - Gordon M Lowe
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK.
| | - Griangsak Eumkeb
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
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25
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Delcourt M, Tagliatti V, Delsinne V, Colet JM, Declèves AE. Influence of Nutritional Intake of Carbohydrates on Mitochondrial Structure, Dynamics, and Functions during Adipogenesis. Nutrients 2020; 12:nu12102984. [PMID: 33003504 PMCID: PMC7600802 DOI: 10.3390/nu12102984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 12/17/2022] Open
Abstract
Obesity is an alarming yet increasing phenomenon worldwide, and more effective obesity management strategies have become essential. In addition to the numerous anti-adipogenic treatments promising a restauration of a healthy white adipose tissue (WAT) function, numerous studies reported on the critical role of nutritional parameters in obesity development. In a metabolic disorder context, a better control of nutrient intake is a key step in slowing down adipogenesis and therefore obesity. Of interest, the effect on WAT remodeling deserves deeper investigations. Among the different actors of WAT plasticity, the mitochondrial network plays a central role due to its dynamics and essential cellular functions. Hence, the present in vitro study, conducted on the 3T3-L1 cell line, aimed at evaluating the incidence of modulating the carbohydrates intake on adipogenesis through an integrated assessment of mitochondrial structure, dynamics, and functions-correlated changes. For this purpose, our experimental strategy was to compare the occurrence of adipogenesis in 3T3-L1 cells cultured either in a high-glucose (HG) medium (25 mM) or in a low-glucose (LG) medium (5 mM) supplemented with equivalent galactose (GAL) levels (20 mM). The present LG-GAL condition was associated, in differentiating adipocytes, to a reduced lipid droplet network, lower expressions of early and late adipogenic genes and proteins, an increased mitochondrial network with higher biogenesis marker expression, an equilibrium in the mitochondrial fusion/fission pattern, and a decreased expression of mitochondrial metabolic overload protein markers. Therefore, those main findings show a clear effect of modulating glucose accessibility on 3T3-L1 adipogenesis through a combined effect of adipogenesis modulation and overall improvement of the mitochondrial health status. This nutritional approach offers promising opportunities in the control and prevention of obesity.
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Affiliation(s)
- Manon Delcourt
- Metabolic and Molecular Biochemistry Unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 place du Parc, 7000 Mons, Belgium;
- Human Biology and Toxicology unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 Place du Parc, 7000 Mons, Belgium; (V.T.); (V.D.); (J.-M.C.)
- Correspondence: ; Tel.: +32-(0)65-373506
| | - Vanessa Tagliatti
- Human Biology and Toxicology unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 Place du Parc, 7000 Mons, Belgium; (V.T.); (V.D.); (J.-M.C.)
| | - Virginie Delsinne
- Human Biology and Toxicology unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 Place du Parc, 7000 Mons, Belgium; (V.T.); (V.D.); (J.-M.C.)
| | - Jean-Marie Colet
- Human Biology and Toxicology unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 Place du Parc, 7000 Mons, Belgium; (V.T.); (V.D.); (J.-M.C.)
| | - Anne-Emilie Declèves
- Metabolic and Molecular Biochemistry Unit, Faculty of Medicine and Pharmacy, Research Institute for Health Sciences and Technology, UMONS, 20 place du Parc, 7000 Mons, Belgium;
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26
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Effect of treatment with conditioned media derived from C2C12 myotube on adipogenesis and lipolysis in 3T3-L1 adipocytes. PLoS One 2020; 15:e0237095. [PMID: 32756599 PMCID: PMC7406041 DOI: 10.1371/journal.pone.0237095] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/20/2020] [Indexed: 01/04/2023] Open
Abstract
Regular exercise is an effective strategy that is used to prevent and treat obesity as well as type 2 diabetes. Exercise-induced myokine secretion is considered a mechanism that coordinates communication between muscles and other organs. In order to examine the possibility of novel communications from muscle to adipose tissue mediated by myokines, we treated 3T3-L1 adipocytes with C2C12 myotube electrical pulse stimulation-conditioned media (EPS-CM), using a C2C12 myotube contraction system stimulated by an electrical pulse. Continuous treatment with myotube EPS-CM promoted adipogenesis of 3T3-L1 pre-adipocytes via the upregulation of the peroxisome proliferator-activated receptor-gamma (PPARγ) 2 and PPARγ-regulated gene expression. Furthermore, our results revealed that myotube EPS-CM induces lipolysis and secretion of adiponectin in mature adipocytes. EPS-CM obtained from a C2C12 myoblast culture did not induce such changes in these genes, suggesting that contraction-induced myokine(s) secretion occurs particularly in differentiated myotubes. Thus, contraction-induced secretion of myokine(s) promotes adipogenesis and lipid metabolism in 3T3-L1 adipocytes. These findings suggest the possibility that skeletal muscle communicates to adipose tissues during exercise, probably by the intermediary of unidentified myokines.
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27
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Krycer JR, Quek LE, Francis D, Zadoorian A, Weiss FC, Cooke KC, Nelson ME, Diaz-Vegas A, Humphrey SJ, Scalzo R, Hirayama A, Ikeda S, Shoji F, Suzuki K, Huynh K, Giles C, Varney B, Nagarajan SR, Hoy AJ, Soga T, Meikle PJ, Cooney GJ, Fazakerley DJ, James DE. Insulin signaling requires glucose to promote lipid anabolism in adipocytes. J Biol Chem 2020; 295:13250-13266. [PMID: 32723868 DOI: 10.1074/jbc.ra120.014907] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/14/2020] [Indexed: 12/12/2022] Open
Abstract
Adipose tissue is essential for metabolic homeostasis, balancing lipid storage and mobilization based on nutritional status. This is coordinated by insulin, which triggers kinase signaling cascades to modulate numerous metabolic proteins, leading to increased glucose uptake and anabolic processes like lipogenesis. Given recent evidence that glucose is dispensable for adipocyte respiration, we sought to test whether glucose is necessary for insulin-stimulated anabolism. Examining lipogenesis in cultured adipocytes, glucose was essential for insulin to stimulate the synthesis of fatty acids and glyceride-glycerol. Importantly, glucose was dispensable for lipogenesis in the absence of insulin, suggesting that distinct carbon sources are used with or without insulin. Metabolic tracing studies revealed that glucose was required for insulin to stimulate pathways providing carbon substrate, NADPH, and glycerol 3-phosphate for lipid synthesis and storage. Glucose also displaced leucine as a lipogenic substrate and was necessary to suppress fatty acid oxidation. Together, glucose provided substrates and metabolic control for insulin to promote lipogenesis in adipocytes. This contrasted with the suppression of lipolysis by insulin signaling, which occurred independently of glucose. Given previous observations that signal transduction acts primarily before glucose uptake in adipocytes, these data are consistent with a model whereby insulin initially utilizes protein phosphorylation to stimulate lipid anabolism, which is sustained by subsequent glucose metabolism. Consequently, lipid abundance was sensitive to glucose availability, both during adipogenesis and in Drosophila flies in vivo Together, these data highlight the importance of glucose metabolism to support insulin action, providing a complementary regulatory mechanism to signal transduction to stimulate adipose anabolism.
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Affiliation(s)
- James R Krycer
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Lake-Ee Quek
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; School of Mathematics and Statistics, University of Sydney, Sydney, New South Wales, Australia
| | - Deanne Francis
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Armella Zadoorian
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Fiona C Weiss
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Kristen C Cooke
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Marin E Nelson
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Alexis Diaz-Vegas
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Sean J Humphrey
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Richard Scalzo
- Faculty of Engineering and Information Technologies, University of Sydney, Sydney, New South Wales, Australia
| | - Akiyoshi Hirayama
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan; AMED-CREST, Japan Agency for Medical Research and Development (AMED), Otemachi, Chiyoda-Ku, Tokyo, Japan
| | - Satsuki Ikeda
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan
| | - Futaba Shoji
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan
| | - Kumi Suzuki
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan
| | - Kevin Huynh
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Corey Giles
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Bianca Varney
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Shilpa R Nagarajan
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Andrew J Hoy
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Tomoyoshi Soga
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, Japan; AMED-CREST, Japan Agency for Medical Research and Development (AMED), Otemachi, Chiyoda-Ku, Tokyo, Japan
| | - Peter J Meikle
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Gregory J Cooney
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Daniel J Fazakerley
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - David E James
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales, Australia; Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia; Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.
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28
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Yang C, Li J, Sun F, Zhou H, Yang J, Yang C. The functional duality of SGK1 in the regulation of hyperglycemia. Endocr Connect 2020; 9:R187-R194. [PMID: 32621586 PMCID: PMC7424354 DOI: 10.1530/ec-20-0225] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022]
Abstract
Hyperglycemia is the consequence of blood glucose dysregulation and a driving force of diabetic complications including retinopathy, nephropathy and cardiovascular diseases. The serum and glucocorticoid inducible kinase-1 (SGK1) has been suggested in the modulation of various pathophysiological activities. However, the role of SGK1 in blood glucose homeostasis remains less appreciated. In this review, we intend to summarize the function of SGK1 in glucose level regulation and to examine the evidence supporting the therapeutic potential of SGK1 inhibitors in hyperglycemia. Ample evidence points to the controversial roles of SGK1 in pancreatic insulin secretion and peripheral insulin sensitivity, which reflects the complex interplay between SGK1 activation and blood glucose fluctuation. Furthermore, SGK1 is engaged in glucose absorption and excretion in intestine and kidney and participates in the progression of hyperglycemia-induced secondary organ damage. As a net effect, blockage of SGK1 activation via either pharmacological inhibition or genetic manipulation seems to be helpful in glucose control at varying diabetic stages.
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Affiliation(s)
- Chunliang Yang
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- The Center for Biomedical Research, Tongji Hospital Research Building, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junyi Li
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fei Sun
- The Center for Biomedical Research, Tongji Hospital Research Building, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haifeng Zhou
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jia Yang
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Correspondence should be addressed to C Yang or J Yang: or
| | - Chao Yang
- Department of Gerontology, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, China
- Correspondence should be addressed to C Yang or J Yang: or
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29
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Pelargonidin suppresses adipogenesis in 3T3-L1 cells through inhibition of PPAR-γ signaling pathway. Arch Biochem Biophys 2020; 686:108365. [DOI: 10.1016/j.abb.2020.108365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/08/2020] [Accepted: 04/08/2020] [Indexed: 02/08/2023]
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30
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Rharass T, Lucas S. High Glucose Level Impairs Human Mature Bone Marrow Adipocyte Function Through Increased ROS Production. Front Endocrinol (Lausanne) 2019; 10:607. [PMID: 31551934 PMCID: PMC6746912 DOI: 10.3389/fendo.2019.00607] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 08/21/2019] [Indexed: 12/20/2022] Open
Abstract
Bone marrow adipocytes (BMAds) accumulate in aging, menopause, and metabolic diseases such as Type 2 diabetes. These osteoporotic conditions are associated with oxidative stress and hyperglycemia which are both considered as critical factors underlying bone fragility. Glucose excess and reactive oxygen species (ROS) are known to favor adipogenesis over osteoblastogenesis. In this study, we investigated whether high glucose exposure could determine dysfunction of mature BMAds, specifically through ROS production. The effects of low (LG, 5 mM) or high glucose (HG, 25 mM) concentrations were examined using human bone mesenchymal stromal cells (hBMSCs) in the time course of differentiation, and, up to 21 days once adipocytes were mature. HG did not alter the adipocyte differentiation process of hBMSCs. Yet, after 21 days under HG exposure, PPARG, CEBPA, and adiponectin mRNA expressions were decreased. These alterations were also observed following adipogenic inducer withdrawal as well as in adipocytes fully differentiated in LG then cultured in HG for the last 11 days. Without inducers, HG condition also led to decreased leptin mRNA level. Importantly, intracellular and extracellular ROS concentrations measured using Amplex Red were significantly raised by 50% under HG exposure. This rise was observed once adipocytes ended differentiation and was reproduced within the different cell culture settings without any cytotoxicity. Among genes involved in ROS metabolism, the mRNA level of the H2O2 generating enzyme NOX4 was found upregulated in the presence of HG. Following cell separation, mature BMAds were shown to overproduce ROS and to display the gene alterations in contrast to non-lipid-laden cells. Finally, a non-lethal treatment with a pro-oxidant agent under LG condition reduces the mRNA levels of PPARG, adiponectin, and leptin as the HG condition does in the absence of inducers, and amplifies the effect of glucose excess on gene expression. HG concentration drives mature BMAds toward altered expression of the main adipokines and transcriptional factors. These perturbations are associated with a rise in ROS generation likely mediated through enhanced expression of NOX4. Mature BMAds are thus responsive to changes in glucose and ROS concentrations, which is relevant regarding with their phenotype and function in age- or metabolic disease-related osteoporosis.
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31
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Christian SL, Pallegar NK, Brown RJ, Viloria-Petit AM. Collagen overlays can inhibit leptin and adiponectin secretion but not lipid accumulation in adipocytes. PeerJ 2018; 6:e4641. [PMID: 29719734 PMCID: PMC5926549 DOI: 10.7717/peerj.4641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 03/28/2018] [Indexed: 12/01/2022] Open
Abstract
Background White adipose tissue (WAT) is essential for energy storage as well as being an active endocrine organ. The secretion of adipokines by adipocytes can affect whole body metabolism, appetite, and contribute to overall health. WAT is comprised of lipid-laden mature adipocytes, as well as immune cells, endothelial cells, pre-adipocytes, and adipose-derived stem cells. In addition, the presence of extracellular matrix (ECM) proteins in WAT can actively influence adipocyte differentiation, growth, and function. Type I collagen is an abundant fibrous ECM protein in WAT that is secreted by developing adipocytes. However, the extent and overall effect of Type I collagen on adipokine secretion in mature adipocytes when added exogenously has not been established. Methods We characterized the effects of Type I collagen overlays prepared using two different buffers on adipocyte physiology and function when added at different times during differentiation. In addition, we compared the effect of collagen overlays when adipocytes were cultured on two different tissue culture plastics that have different adherent capabilities. Triglyceride accumulation was analyzed to measure adipocyte physiology, and leptin and adiponectin secretion was determined to analyze effects on adipokine secretion. Results We found that collagen overlays, particularly when added during the early differentiation stage, impaired adipokine secretion from mature adipocytes. Collagen prepared using PBS had a greater suppression of leptin than adiponectin while collagen prepared using HANKS buffer suppressed the secretion of both adipokines. The use of CellBind plates further suppressed leptin secretion. Triglyceride accumulation was not substantially impacted with any of the collagen overlays. Discussion Adipokine secretion can be selectively altered by collagen overlays. Thus, it is feasible to selectively manipulate the secretion of adipokines by adipocytes in vitro by altering the composition or timing of collagen overlays. The use of this technique could be applied to studies of adipokine function and secretion in vitro as well as having potential therapeutic implications to specifically alter adipocyte functionality in vivo.
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Affiliation(s)
- Sherri L Christian
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Nikitha K Pallegar
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Robert J Brown
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
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