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Rodrigues C, Ismael S, Castela I, Barreiros-Mota I, Almeida MJ, Santos GM, Calhau C, Rocha JC, Faria A, Araújo JR. Trimethylamine increases intestinal fatty acid absorption: in vitro studies in a Caco-2 cell culture system. J Nutr Sci 2023; 12:e108. [PMID: 37964979 PMCID: PMC10641700 DOI: 10.1017/jns.2023.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/11/2023] [Accepted: 10/06/2023] [Indexed: 11/16/2023] Open
Abstract
Although elevated blood levels of trimethylamine N-oxide (TMAO) have been associated with atherosclerosis development in humans, the role of its gut microbiota-derived precursor, TMA, in this process has not been yet deciphered. Taking this into account, and the fact that increased intestinal fatty acid absorption contributes to atherosclerosis onset and progression, this study aimed to evaluate the effect of TMA on fatty acid absorption in a cell line that mimics human enterocytes. Caco-2 cells were treated with TMA 250 μM for 24 h. Fatty acid absorption was assessed by measuring the apical-to-basolateral transport and the intracellular levels of BODIPY-C12, a fluorescently labelled fatty acid analogue. Gene expression of the main intestinal fatty acid transporters was evaluated by real-time quantitative reverse transcription PCR. Compared to control conditions, TMA increased, in a time-dependent manner and by 20-50 %, the apical-to-basolateral transport and intracellular levels of BODIPY-C12 fatty acid in Caco-2 cells. Fatty acid transport protein 4 (FATP4) and fatty acid translocase (FAT)/CD36 gene expression were not stimulated by TMA, suggesting that TMA-induced increase in fatty acid transport may be mediated by an increase in FAT/CD36 and/or FATP4 activity and/or fatty acid passive transport. This study demonstrated that TMA increases the intestinal absorption of fatty acids. Future studies are necessary to confirm if this may constitute a novel mechanism that partially explains the existing positive association between the consumption of a diet rich in TMA sources (e.g. red meat) and the increased risk of atherosclerotic diseases.
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Key Words
- Caco-2 cells
- EDTA, ethylenediaminetetraacetic acid
- Enterocytes
- F, forward
- FABP, fatty acid-binding protein
- FABPpm, plasma membrane fatty acid-binding protein
- FAT/CD36, fatty acid translocase
- FATP4, fatty acid transport protein 4
- FBS, foetal bovine serum
- FSA, fluorescein sulphonic acid
- Fatty acid absorption
- HPRT, hypoxanthine guanine phosphoribosyltransferase
- MTT, 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide
- PBS, phosphate-buffered saline
- R, reverse
- TG, triacylglycerol
- TMA, trimethylamine
- TMAO, trimethylamine N-oxide
- Trimethylamine
- qRT-PCR, real-time quantitative reverse transcription polymerase chain reaction
- sem, standard error of the mean
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Affiliation(s)
- Catarina Rodrigues
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Shámila Ismael
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Inês Castela
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Inês Barreiros-Mota
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Maria João Almeida
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Gilberto Maia Santos
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Conceição Calhau
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
- Unidade Universitária Lifestyle Medicine José de Mello Saúde by NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Júlio César Rocha
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
- Reference Centre of Inherited Metabolic Diseases, Centro Hospitalar Universitário de Lisboa Central, Lisboa, Portugal
| | - Ana Faria
- Nutrition & Metabolism, CHRC, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - João R. Araújo
- Nutrition & Metabolism, CINTESIS@RISE, NOVA Medical School, Faculdade de Ciências Médicas, NMS, FCM, Universidade NOVA de Lisboa, Lisboa, Portugal
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Pandit P, Galande S, Iris F. Maternal malnutrition and anaemia in India: dysregulations leading to the 'thin-fat' phenotype in newborns. J Nutr Sci 2021; 10:e91. [PMID: 34733503 DOI: 10.1017/jns.2021.83] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 09/05/2021] [Accepted: 09/10/2021] [Indexed: 12/21/2022] Open
Abstract
Maternal and child malnutrition and anaemia remain the leading factors for health loss in India. Low birth weight (LBW) offspring of women suffering from chronic malnutrition and anaemia often exhibit insulin resistance and infantile stunting and wasting, together with increased risk of developing cardiometabolic disorders in adulthood. The resulting self-perpetuating and highly multifactorial disease burden cannot be remedied through uniform dietary recommendations alone. To inform approaches likely to alleviate this disease burden, we implemented a systems-analytical approach that had already proven its efficacy in multiple published studies. We utilised previously published qualitative and quantitative analytical results of rural and urban field studies addressing maternal and infantile metabolic and nutritional parameters to precisely define the range of pathological phenotypes encountered and their individual biological characteristics. These characteristics were then integrated, via extensive literature searches, into metabolic and physiological mechanisms to identify the maternal and foetal metabolic dysregulations most likely to underpin the ‘thin-fat’ phenotype in LBW infants and its associated pathological consequences. Our analyses reveal hitherto poorly understood maternal nutrition-dependent mechanisms most likely to promote and sustain the self-perpetuating high disease burden, especially in the Indian population. This work suggests that it most probably is the metabolic consequence of ‘ill-nutrition’ – the recent and rapid dietary shifts to high salt, high saturated fats and high sugar but low micronutrient diets – over an adaptation to ‘thrifty metabolism’ which must be addressed in interventions aiming to significantly alleviate the leading risk factors for health deterioration in India.
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Key Words
- 5-mTHF, 5-methyltetrahydrofolate
- Anaemia
- BAT, brown adipocyte tissue
- EAA, essential amino acids
- FA, fatty acid
- GSH, glutathione
- Hcy, homocysteine
- LBW, low birth weight
- Low birth weight
- Malnutrition
- PE, phosphatidylethanolamine
- Pathological mechanisms
- Physiological programming
- SAM, S-adenosyl methionine
- TG, triacylglycerol
- WAT, white adipocyte tissue
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3
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Iskander-Rizk S, Visscher M, Moerman AM, Korteland SA, Van der Heiden K, Van der Steen AF, Van Soest G. Micro Spectroscopic Photoacoustic (μsPA) imaging of advanced carotid atherosclerosis. Photoacoustics 2021; 22:100261. [PMID: 33854946 PMCID: PMC8027769 DOI: 10.1016/j.pacs.2021.100261] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/05/2021] [Accepted: 03/11/2021] [Indexed: 05/11/2023]
Abstract
Atherosclerosis is a lipid-driven and an inflammatory disease of the artery walls. The composition of atherosclerotic plaque stratifies the risk of a specific plaque to cause a cardiovascular event. In an optical resolution photoacoustic microscopy setup, of 45 μm resolution, we extracted plaque lipid photoacoustic (PA) spectral signatures of human endarterectomy samples in the range of 1150-1240 nm, using matrix assisted laser desorption ionization mass spectrometry imaging as a reference. We found plaque PA signals to correlate best with sphingomyelins and cholesteryl esters. PA signal spectral variations within the plaque area were compared to reference molecular patterns and absorption spectra of lipid laboratory standards. Variability in the lipid spectroscopic features extracted by principal component analysis of all samples revealed three distinct components with peaks at: 1164, 1188, 1196 and 1210 nm. This result will guide the development of PA-based atherosclerosis disease staging capitalizing on lipidomics of atherosclerotic tissue.
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Key Words
- Atherosclerosis
- CE, cholesteryl ester
- CEA, carotid endarterectomy
- DG, diacylglycerol
- DHB, 2,5-dihydroxybenzoic acid
- ESI, electrospray ionization
- FTICR, fourier-transform ion cyclotron resonance
- HPLC, high-performance liquid chromatography
- Lipids
- MALDI-MSI, matrix-assisted laser desorption ionization mass spectrometry imaging
- Mass spectrometry imaging
- Microscopy
- NIRS, near-infrared spectroscopy
- PC, phosphatidylcholine
- PCA
- PCA, principal component analysis
- PFA, paraformaldehyde
- SM, sphingomyelin
- Spectroscopy
- TG, triacylglycerol
- WREnS, Waters Research Enabled Software suite
- m/z, mass to charge ratio
- μsPA, Micro Spectroscopic Photoacoustic
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Affiliation(s)
| | | | | | | | | | | | - Gijs Van Soest
- Corresponding author at: Erasmus Medical Center, Ee-2302, PO Box 2040, 3000 CA, Rotterdam, the Netherlands.
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Huang CF, Chen A, Lin SY, Cheng ML, Shiao MS, Mao TY. A metabolomics approach to investigate the proceedings of mitochondrial dysfunction in rats from prediabetes to diabetes. Saudi J Biol Sci 2021; 28:4762-9. [PMID: 34354464 DOI: 10.1016/j.sjbs.2021.04.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 01/12/2023] Open
Abstract
Diabetes mellitus (DM) is a leading cause of preventable cardiovascular disease, but the metabolic changes from prediabetes to diabetes have not been fully clarified. This study implemented a metabolomics profiling platform to investigate the variations of metabolites and to elucidate their global profiling from metabolic syndrome to DM. Methods: Male Sprague-Dawley rats (n = 44) were divided into four groups. Three groups were separately fed with a normal diet, a high-fructose diet (HF), or a high-fat (HL) diet while one group was treated with streptozotocin. The HF and HL diet were meant to induce insulin resistance, obesity, and dyslipidemia, which known to induce DM. Results: The most significant metabolic variations in the DM group’s urine samples were the reduced release of citric acid cycle intermediates, the increase in acylcarnitines, and the decrease in urea excretion, all of which indicated energy metabolism abnormalities and mitochondrial dysfunction. Overall, the metabolic analysis revealed tryptophan metabolic pathway variations in the prediabetic phase, even though the mitochondrial function remains unaffected. Conclusion: This study show that widespread methylations and impaired tryptophan metabolism occur in metabolic syndrome and are then followed by a decline in citric acid cycle intermediates, indicating mitochondrial dysfunction in diabetes.
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Key Words
- CAN, acetonitrile
- DM, diabetes mellitus
- Diabetes
- GOT, glutamate oxaloacetate transaminase
- GPT, glutamate pyruvate transaminase
- HF, high-fructose
- HL, high-fat
- HMDB, human metabolome database
- KEGG, kyoto encyclopedia of genes and genomes
- LC-MS, liquid chromatography–mass spectrometry
- Metabolic syndrome
- Metabolomics
- Methylation
- Mitochondrial dysfunction
- PCA, principal component analysis
- Prediabetes
- STZ, streptozotocin
- TC, total cholesterol
- TG, triacylglycerol
- Tryptophan
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Tanabe K, Hayashi C, Katahira T, Sasaki K, Igami K. Multiblock metabolomics: An approach to elucidate whole-body metabolism with multiblock principal component analysis. Comput Struct Biotechnol J 2021; 19:1956-65. [PMID: 33995897 DOI: 10.1016/j.csbj.2021.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/20/2021] [Accepted: 04/04/2021] [Indexed: 12/16/2022] Open
Abstract
“Multiblock metabolomics” elucidates the global metabolic network in a whole body. “Multiblock metabolomics” combines LC/MS-based metabolomics with multiblock PCA. “Multiblock metabolomics” highlights and elicits organ-specific metabolism. TGs with less unsaturated fatty acids were highly accumulated in the diabetic liver.
Principal component analysis (PCA) is a useful tool for omics analysis to identify underlying factors and visualize relationships between biomarkers. However, this approach is limited in addressing life complexity and further improvement is required. This study aimed to develop a new approach that combines mass spectrometry-based metabolomics with multiblock PCA to elucidate the whole-body global metabolic network, thereby generating comparable metabolite maps to clarify the metabolic relationships among several organs. To evaluate the newly developed method, Zucker diabetic fatty (ZDF) rats (n = 6) were used as type 2 diabetic models and Sprague Dawley (SD) rats (n = 6) as controls. Metabolites in the heart, kidney, and liver were analyzed by capillary electrophoresis and liquid chromatography mass spectrometry, respectively, and the detected metabolites were analyzed by multiblock PCA. More than 300 metabolites were detected in the heart, kidney, and liver. When the metabolites obtained from the three organs were analyzed with multiblock PCA, the score and loading maps obtained were highly synchronized and their metabolism patterns were visually comparable. A significant finding in this study was the different expression patterns in lipid metabolism among the three organs; notably triacylglycerols with polyunsaturated fatty acids or less unsaturated fatty acids showed specific accumulation patterns depending on the organs.
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Key Words
- AMP, adenosine monophosphate
- Biomarkers
- CE/MS, capillary electrophoresis mass spectrometry
- CV, coefficient of variation
- ESI, electrospray ionization
- FABP, fatty acid-binding protein
- GC/MS, gas chromatography mass spectrometry
- LC/MS, liquid chromatography mass spectrometry
- Mass spectrometry
- Metabolomics
- Multiblock PCA
- PCA, principal component analysis
- PPAR, peroxisome proliferator-activated receptor
- QC, quality control
- SD, Sprague Dawley
- TCA, tricarboxylic acid. CoA, coenzyme A
- TG, triacylglycerol
- Type 2 Diabetes
- UPLC, ultra-performance liquid chromatography
- ZDF, Zucker diabetic fatty
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Zheng H, Sun W, Zhang Q, Zhang Y, Ji L, Liu X, Zhu X, Ye H, Xiong Q, Li Y, Lu B, Zhang S. Proinflammatory cytokines predict the incidence of diabetic peripheral neuropathy over 5 years in Chinese type 2 diabetes patients: A prospective cohort study. EClinicalMedicine 2021; 31:100649. [PMID: 33385123 PMCID: PMC7772538 DOI: 10.1016/j.eclinm.2020.100649] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/30/2020] [Accepted: 10/30/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Inflammation has been implicated in the pathogenesis of diabetic peripheral neuropathy (DPN) as suggested in various cross-sectional studies. However, more convincing prospective studies in diabetes patients are scarce. Therefore, we aimed to evaluate whether proinflammatory cytokines could predict the incidence of DPN through a prospective study with a five-year follow-up. METHODS We followed up 315 patients with diabetes who did not have DPN, recruited from five community health centers in Shanghai in 2014, for an average of 5.06 years. Based on the integrity of blood samples, 106 patients were selected to obtain the proinflammatory cytokines. Plasma markers of proinflammatory cytokines at baseline included interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), vascular endothelial growth factor (VEGF), and intercellular adhesion molecule 1 (ICAM-1). Neuropathy was assessed by MSNI at baseline and during follow-up. FINDINGS Among the 106 chosen patients, 63 developed DPN after 5.06±1.14 years of follow-up. The baseline plasma levels of TNF-α, IL-6, and ICAM-1 were higher in the neuropathic group (p<0.05). In multivariate models, increased plasma levels of TNF-α (hazard ratio, HR: 8.74 [95% confidence interval, CI: 1.05-72.68]; p <0.05) and ICAM-1 (HR 23.74 [95% CI:1.47-383.81]; p<0.05) were both associated with incident DPN, after adjusting for known DPN risk factors. INTERPRETATION Increased plasma levels of proinflammatory factors, especially TNF-α and ICAM-1, predicted the incidence of DPN over 5 years in Chinese diabetes patients, but larger longitudinal studies are required for confirmation. FUNDING National Natural Science Foundation of China, Shanghai Talent Development Fund Program, Shanghai Shenkang Hospital Developing Center Clinical Scientific and Technological Innovation Program, Shanghai Science and Technology Committee Program, Shanghai General Hospital Program of Chinese traditional and Western medicine combination and Shanghai Municipal Commission of Health and Family Planning Clinical Research Project.
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Key Words
- ACR, albumin-to-creatinine ratio
- ALT, alanine aminotransferase
- AST, aspartate aminotransferase
- DBP, diastolic blood pressure
- DPN, diabetic peripheral neuropathy
- DSPN, distal sensorimotor polyneuropathy
- Diabetic peripheral neuropathy
- FPG, fasting plasma glucose
- HDL-C, high-density lipoprotein cholesterol
- HbA1c, glycated hemoglobin
- IL-1RA, interleukin-1 receptor antagonist
- LDL-C, low-density lipoprotein cholesterol
- MDRD, Modification of Diet in Renal Disease
- MNSI, Michigan Neuropathy Screening Instrument
- NLR, neutrophil-to-lymphocyte ratio
- PPG, postprandial plasma glucose
- Predict
- Proinflammatory cytokines
- SBP, systolic blood pressure
- Scr, serum creatinine
- TC, total cholesterol
- TG, triacylglycerol
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Affiliation(s)
- Hangping Zheng
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Wanwan Sun
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Qi Zhang
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yuanpin Zhang
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Lijin Ji
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xiaoxia Liu
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xiaoming Zhu
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Hongying Ye
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Qian Xiong
- Department of Endocrinology, Shanghai Gonghui Hospital, Shanghai 200041, China
| | - Yiming Li
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Bin Lu
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
- Corresponding authors.
| | - Shuo Zhang
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
- Corresponding authors.
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Abstract
Table olives, a product of olive tree (Olea europaea L.), is an important fermented product of the Mediterranean Diet. Agronomical factors, particularly the cultivar, the ripening stage and the processing method employed are the main factors influencing the nutritional and non-nutritional composition of table olives and their organoleptic properties. The important nutritional value of this product is due to its richness in monounsaturated fat (MUFA), mainly oleic acid, fibre and vitamin E together with the presence of several phytochemicals. Among these, hydroxytyrosol (HT) is the major phenolic compound present in all types of table olives. There is a scarcity of in vitro, in vivo and human studies of table olives. This review focused comprehensively on the nutrients and bioactive compound content as well as the health benefits assigned to table olives. The possible health benefits associated with their consumption are thought to be primarily related to effects of MUFA on cardiovascular health, the antioxidant (AO) capacity of vitamin E and its role in protecting the body from oxidative damage and the anti-inflammatory and AO activities of HT. The influence of multiple factors on composition of the end product and the potential innovation in the production of table olives through the reduction of its final salt content was also discussed.
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Key Words
- ALS, amyotrophic lateral sclerosis
- AO, antioxidant
- Alpha-tocopherol
- BP, blood pressure
- CVD, cardiovascular disease
- DM-II, Diabetes Mellitus 2
- EFSA, European Food Safety Authority
- FM, fat mass
- GSH, glutathione
- HDL-c, high-density lipoprotein cholesterol
- HT, hydroxytyrosol
- LDL-c, low-density lipoprotein cholesterol
- MD, Mediterranean Diet
- MUFA, monounsaturated fat
- Mediterranean Diet
- Monounsaturated fat
- NO, nitric oxide
- NaCl, sodium chloride
- NaOH, sodium hydroxide
- Nrf2, nuclear factor erythroid 2-related factor 2
- OL, oleuropein
- OO, olive oil
- PKC, protein kinase C
- PUFA, polyunsaturated fat
- Phenolic compounds
- RDA, Recommended Dietary Allowance
- ROS, reactive oxygen species
- TC, total cholesterol
- TG, triacylglycerol
- TG, triglyceride
- Table olives
- Ty, tyrosol
- WHO, World Health Organization
- cv, cultivar
- e.p, edible portion
- α-TOH, alpha-tocopherol
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Sato T, Shibata F, Koiwai T, Akimoto N. Different regulation of lipogenesis in sebocytes and subcutaneous preadipocytes in hamsters in vitro. Biochem Biophys Rep 2020; 22:100761. [PMID: 32300663 PMCID: PMC7152706 DOI: 10.1016/j.bbrep.2020.100761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/25/2020] [Accepted: 04/02/2020] [Indexed: 12/23/2022] Open
Abstract
Sebaceous gland cells (sebocytes) differentiate to intracellularly accumulate lipid droplets – a phenomenon similar to that found in adipocytes. In the present study, we examined whether the regulation of lipogenesis in sebocytes is the same as that in preadipocytes. When sebocytes and preadipocytes, prepared from auricle and subcutaneous adipose tissues from the inguinal region of hamsters, respectively, were treated with a common differentiation inducer, insulin, intracellular lipid-droplet formation and triacyglycerol (TG) production were dose- and time-dependently augmented in both. Insulin increased the production of perilipin, a differentiation marker in both sebocytes and adipocytes. Insulin-like growth factor 1 (IGF-1) augmented the intracellular level of TG in sebocytes and preadipocytes. In addition, the action of 1α,25-dihydroxyvitamin D3 [1,25(OH2)D3] on TG production was the opposite between sebocytes and preadipocytes. Furthermore, 5α-dihydrotestosterone (5α-DHT) augmented the TG level in sebocytes, whereas it did not alter TG production in preadipocytes. Moreover, insulin-augmented TG production in sebocytes was enhanced by IGF-1 and 5α-DHT, while diminished by 1,25(OH2)D3. In preadipocytes, the insulin-augmented production of TG was decreased by IGF-1, 1,25(OH2)D3, and 5α-DHT. These results suggest that sebocytic lipogenesis is partially similar to but substantially different from adipocyte lipogenesis due to the forementioned hormones and growth factors in the skin under physiological conditions. Insulin and IGF-1 augmented lipogenesis and perilipin production in hamster preadipocytes and sebocytes. The action of 1,25(OH2)D3 and 5a-DHT on lipogenesis differed between sebocytes and preadipocytes Insulin-augmented sebaceous lipogenesis was enhanced by IGF-1 and 5α-DHT, while diminished by 1,25(OH2)D3. In preadipocytes, the insulin-augmented lipogenesis was decreased by IGF-1, 1,25(OH2)D3, and 5α-DHT. Sebocytic lipogenesis is partially similar to but substantially different from adipocyte lipogenesis.
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Key Words
- 1,25(OH)2D3, 1α,25-dihydroxyvitamin D3
- 5α-DHT, 5α-dihydrotestosterone
- DMEM/F12, Dulbecco's modified Eagle's medium/Ham's F12 medium
- Dex, dexamethasone
- FBS, fetal bovine serum
- IBMX, 3-isobutyl-1-methyl-xanthine
- IGF-1, insulin-like growth factor 1
- Lipid-droplet formation
- Lipogenesis
- PG, prostaglandin
- PPAR, peroxisome proliferation-activating receptor
- Preadipocytes
- Sebocytes
- TG, triacylglycerol
- Triacyglycerol
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Affiliation(s)
- Takashi Sato
- Department of Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192-0392, Japan
| | - Fusatoshi Shibata
- Department of Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192-0392, Japan
| | - Toshikazu Koiwai
- Department of Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192-0392, Japan
| | - Noriko Akimoto
- Department of Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192-0392, Japan
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Abstract
Intake of high-fat/high-sucrose (HFS) diet or high fat diet influences bone metabolism in young rodents, but its effects on bone properties of aged rodents still remain unclear. This study aimed to examine the effects of HFS diet intake on trabecular bone architecture (TBA) and cortical bone geometry (CBG) in aged rats. Fifteen male Wistar rats over 1 year were randomly divided into two groups. One group was fed a standard laboratory diet (SLD) and the other group was fed a HFS diet for six months. The femur/tibia, obtained from both groups at the end of experimental period, were scanned by micro-computed tomography for TBA/CBG analyses. Serum biochemical analyses were also conducted. Body weight was significantly higher in the HFS group than in the SLD group. In both femur and tibia, the HFS group showed higher trabecular/cortical bone mass in reference to bone mineral content, volume bone mineral density and TBA/CBG parameters compared with the SLD group. In addition, serum calcium, inorganic phosphorus, total protein, triacylglycerol, HDL and TRACP-5b levels were significantly higher in the HFS group than in the SLD group. There were good correlations between body weight and bone parameters in the femur and tibia. These results suggest that HFS diet intake results in higher bone mass in aged rats. Such effects of HFS diet intake might have been induced by increased body weight.
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Key Words
- ALP, alkaline phosphatase
- Aged rats
- BMC, bone mineral content
- BMD, bone mineral density
- BV, bone volume
- BV/TV, bone volume fraction
- CBG, cortical bone geometry
- CV, cortical bone volume
- CV/(CV + MV), cortical volume fraction
- Ca, calcium
- Conn.D, connectivity density
- Cortical bone geometry
- Ct.Ar, cortical bone sectional area
- Ct.Th, cortical bone thickness
- DXA, dual-energy X-ray absorptiometry
- Ec.Pm, endocortical perimeter
- HDL, high-density lipoprotein cholesterol
- HFD, high fat diet
- HFS, high-fat/high-sucrose
- High-fat sucrose diet
- IP, inorganic phosphorus
- LDL, low-density lipoprotein cholesterol
- MV, medullary volume
- Micro-computed tomography
- OC, osteocalcin
- Ps.Pm, periosteal perimeter
- SLD, standard laboratory diet
- TBA, trabecular bone architecture
- TBPf, trabecular bone pattern factor
- TC, total cholesterol
- TG, triacylglycerol
- TMD, tissue mineral density
- TP, total protein
- TRACP-5b, tartrate-resistant acid phosphatase-5b
- TV, tissue volume
- Tb.N, trabecular number
- Tb.Sp, trabecular separation
- Tb.Th, trabecular thickness
- Tb.W, trabecular width
- Trabecular bone architecture
- VOI, volume of interest
- micro-CT, x-ray micro-computed tomography
- vBMD, volume BMD
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Affiliation(s)
- Akira Minematsu
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Yasue Nishii
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Susumu Sakata
- Department of Physiology, Nara Medical University, 840 Shijou-cho, Kashihara, Nara 634-8521, Japan
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10
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Lundsgaard AM, Fritzen AM, Sjøberg KA, Myrmel LS, Madsen L, Wojtaszewski JFP, Richter EA, Kiens B. Circulating FGF21 in humans is potently induced by short term overfeeding of carbohydrates. Mol Metab 2016; 6:22-29. [PMID: 28123934 PMCID: PMC5220397 DOI: 10.1016/j.molmet.2016.11.001] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/07/2016] [Accepted: 11/09/2016] [Indexed: 01/05/2023] Open
Abstract
Objective Fibroblast-growth factor 21 (FGF21) is thought to be important in metabolic regulation. Recently, low protein diets have been shown to increase circulating FGF21 levels. However, when energy contribution from dietary protein is lowered, other macronutrients, such as carbohydrates, must be increased to meet eucaloric balance. This raises the possibility that intake of a diet rich in carbohydrates may induce an increase in plasma FGF21 levels per se. Here we studied the role of dietary carbohydrates on the levels of circulating FGF21 and concomitant physiologic effects by feeding healthy men a carbohydrate rich diet without reducing protein intake. Methods A diet enriched in carbohydrates (80 E% carbohydrate; CHO) and a eucaloric control diet (CON) were provided to nine healthy men for three days. The energy intake during the CHO diet was increased (+75% energy) to ensure similar dietary protein intake in CHO and CON. To control for the effect of caloric surplus, we similarly overfed (+75% energy) the same subjects for three days with a fat-rich diet (78 E% fat; FAT), consisting of primarily unsaturated fatty acids. The three diets were provided in random order. Results After CHO, plasma FGF21 concentration increased 8-fold compared to CON (329 ± 99 vs. 39 ± 9 pg ml−1, p < 0.05). In contrast, after FAT only a non-significant tendency (p = 0.073) to an increase in plasma FGF21 concentration was found. The increase in FGF21 concentration after CHO correlated closely (r = 0.88, p < 0.01) with increased leg glucose uptake (62%, p < 0.05) and increased hepatic glucose production (17%, p < 0.01), indicating increased glucose turnover. Plasma fatty acid (FA) concentration was decreased by 68% (p < 0.01), supported by reduced subcutaneous adipose tissue HSL Ser660 phosphorylation (p < 0.01) and perilipin 1 protein content (p < 0.01), pointing to a suppression of adipose tissue lipolysis. Concomitantly, a 146% increase in the plasma marker of hepatic de novo lipogenesis C16:1 n−7 FA (p < 0.01) was observed together with 101% increased plasma TG concentration (p < 0.001) in association with CHO intake and increased plasma FGF21 concentration. Conclusion Excess dietary carbohydrate, but not fat, led to markedly increased FGF21 secretion in humans, notably without protein restriction, and affected glucose and lipid homeostais. Dietary carbohydrate excess induces circulating FGF21 8-fold in humans. Increased FGF21 was associated with increased hepatic glucose production and lipogenesis. The induction of FGF21 was associated with increased leg glucose uptake. The induction of FGF21 was accompanied by indices of lower adipose tissue lipolysis.
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Key Words
- AMPK, AMP-activated kinase
- ATGL, adipose triglyceride lipase
- BCA, bicinchoninic acid
- BM, body mass
- BMI, body mass index
- CHO, carbohydrate-rich diet
- CON, control diet
- Carbohydrates
- ChREBP, carbohydrate-responsive element binding protein
- Diet
- FA, fatty acid
- FAT, fat-rich diet
- FGF21
- FGF21, fibroblast growth factor 21
- GLUT4, glucose transporter 4
- HSL, hormone sensitive lipase
- LM, leg mass
- Lipolysis
- Liver
- PKA, protein kinase A
- Ra, rate of appearance
- TG, triacylglycerol
- VLDL, very low density lipoprotein
- VO2peak, maximal oxygen consumption
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Affiliation(s)
- Anne-Marie Lundsgaard
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Andreas M Fritzen
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Kim A Sjøberg
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lene S Myrmel
- National Institute of Nutrition and Seafood Research, Bergen, Norway
| | - Lise Madsen
- National Institute of Nutrition and Seafood Research, Bergen, Norway; Laboratory of Genomics and Molecular Biomedicine, Department of Biology, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen F P Wojtaszewski
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Erik A Richter
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Bente Kiens
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.
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11
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Vahmani P, Meadus WJ, da Silva ML, Mitchell AD, Mapiye C, Duff P, Rolland DC, Dugan ME. A trans10-18:1 enriched fraction from beef fed a barley grain-based diet induces lipogenic gene expression and reduces viability of HepG2 cells. Biochem Biophys Rep 2016; 7:84-90. [PMID: 28955893 PMCID: PMC5613299 DOI: 10.1016/j.bbrep.2016.05.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 05/26/2016] [Indexed: 12/05/2022] Open
Abstract
Beef fat is a natural source of trans (t) fatty acids, and is typically enriched with either t10-18:1 or t11-18:1. Little is known about the bioactivity of individual t-18:1 isomers, and the present study compared the effects of t9-18:1, cis (c)9-18:1 and trans (t)-18:1 fractions isolated from beef fat enriched with either t10-18:1 (HT10) or t11-18:1 (HT11). All 18:1 isomers resulted in reduced human liver (HepG2) cell viability relative to control. Both c9-18:1 and HT11were the least toxic, t9-18:1had dose response increased toxicity, and HT10 had the greatest toxicity (P<0.05). Incorporation of t18:1 isomers was 1.8-2.5 fold greater in triacylglycerol (TG) than phospholipids (PL), whereas Δ9 desaturation products were selectively incorporated into PL. Culturing HepG2 cells with t9-18:1 and HT10 increased (P<0.05) the Δ9 desaturation index (c9-16:1/16:0) compared to other fatty acid treatments. HT10 and t9-18:1 also increased expression of lipogenic genes (FAS, SCD1, HMGCR and SREBP2) compared to control (P<0.05), whereas c9-18:1 and HT11 did not affect the expression of these genes. Our results suggest effects of HT11 and c9-18:1 were similar to BSA control, whereas HT10 and t-9 18:1 (i.e. the predominant trans fatty acid isomer found in partially hydrogenated vegetable oils) were more cytotoxic and led to greater expression of lipogenic genes.
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Key Words
- ACC, acetyl-CoA carboxylase
- Ag+-SPE, silver ion solid phase extraction
- BSA, bovine serum albumin
- Beef
- Cell culture
- Cytotoxicity
- FAS, fatty acid synthase
- Fatty acid metabolism
- HMGCR, 3-Hydroxy-3-Methylglutaryl-CoA reductase
- HT10, high-t10 fraction
- HT11, high-t11 fraction
- Liver
- MUFA, monounsaturated fatty acids
- PHVO, partially hydrogenated vegetable oils
- PL, phospholipid
- PUFA, polyunsaturated fatty acids
- SCD1, stearoyl-CoA desaturase-1
- SFA, saturated fatty acid
- SREBP1c, sterol regulatory element-binding protein-1c
- SREBP2, sterol regulatory element-binding protein-2
- TG, triacylglycerol
- TLC, thin layer chromatography
- Trans fatty acids
- c,, cis
- t, trans
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Affiliation(s)
- Payam Vahmani
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, Canada
| | - William J. Meadus
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, Canada
| | - Maria L.P. da Silva
- Faculty of Veterinary and Agricultural Sciences, São Paulo State University, Jaboticabal, SP, Brazil
| | - Alec D. Mitchell
- Faculty of Science, University of Alberta, Edmonton, Alberta, Canada
| | - Cletos Mapiye
- Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, P. Bag X1, Matieland 7602, South Africa
| | - Pascale Duff
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, Canada
| | - David C. Rolland
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, Canada
| | - Michael E.R. Dugan
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, Canada
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12
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Zhao S, Poursharifi P, Mugabo Y, Levens EJ, Vivot K, Attane C, Iglesias J, Peyot ML, Joly E, Madiraju SM, Prentki M. α/β-Hydrolase domain-6 and saturated long chain monoacylglycerol regulate insulin secretion promoted by both fuel and non-fuel stimuli. Mol Metab 2015; 4:940-50. [PMID: 26909310 PMCID: PMC4731734 DOI: 10.1016/j.molmet.2015.09.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 09/21/2015] [Accepted: 09/28/2015] [Indexed: 01/15/2023] Open
Abstract
Objective α/β-Hydrolase domain-6 (ABHD6) is a newly identified monoacylglycerol (MAG) lipase. We recently reported that it negatively regulates glucose stimulated insulin secretion (GSIS) in the β cells by hydrolyzing lipolysis-derived MAG that acts as a metabolic coupling factor and signaling molecule via exocytotic regulator Munc13-1. Whether ABHD6 and MAG play a role in response to all classes of insulin secretagogues, in particular various fuel and non-fuel stimuli, is unknown. Methods Insulin secretion in response to various classes of secretagogues, exogenous MAG and pharmacological agents was measured in islets of mice deficient in ABHD6 specifically in the β cell (BKO). Islet perifusion experiments and determinations of glucose and fatty acid metabolism, cytosolic Ca2+ and MAG species levels were carried out. Results Deletion of ABHD6 potentiated insulin secretion in response to the fuels glutamine plus leucine and α-ketoisocaproate and to the non-fuel stimuli glucagon-like peptide 1, carbamylcholine and elevated KCl. Fatty acids amplified GSIS in control and BKO mice to the same extent. Exogenous 1-MAG amplified insulin secretion in response to fuel and non-fuel stimuli. MAG hydrolysis activity was greatly reduced in BKO islets without changes in total diacylglycerol and triacylglycerol lipase activity. ABHD6 deletion induced insulin secretion independently from KATP channels and did not alter the glucose induced rise in intracellular Ca2+. Perifusion studies showed elevated insulin secretion during second phase of GSIS in BKO islets that was not due to altered cytosolic Ca2+ signaling or because of changes in glucose and fatty acid metabolism. Glucose increased islet saturated long chain 1-MAG species and ABHD6 deletion caused accumulation of these 1-MAG species at both low and elevated glucose. Conclusion ABHD6 regulates insulin secretion in response to fuel stimuli at large and some non-fuel stimuli by controlling long chain saturated 1-MAG levels that synergize with other signaling pathways for secretion. ABHD6 is the major monoacylglycerol (MAG) hydrolase in pancreatic β cells. 1-MAG level is elevated in islets from β cell specific ABHD6-KO mice (BKO). BKO islets show enhanced fuel and non-fuel induced insulin secretion. ABHD6 accessible 1-MAG synergizes with other signals for insulin secretion.
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Key Words
- 1-OG, 1-oleoylglycerol
- 1-PG, 1-palmitoylglycerol
- 1-SG, 1-stearoylglycerol
- ABHD6, α/β-hydrolase domain-6
- ATGL, adipose triglyceride lipase
- BKO, β cell specific ABHD6-knockout
- Carb, carbamylcholine
- Cytosolic Ca2+
- DAG, diacylglycerol
- FFA, free fatty acid
- Flox, flox/flox
- GL/FFA, glycerolipid/ free fatty acid
- GLP1, glucagon-like peptide 1
- GPCR, G-protein coupled receptor
- GSIS, glucose stimulated insulin secretion
- HSL, hormone sensitive lipase
- Insulin secretion
- KO, knockout
- Kic, α-ketoisocaproate
- MAG, monoacylglycerol
- Monoacylglycerol
- OGTT, oral glucose tolerance test
- Pancreatic islets
- ROS, reactive oxygen species
- TG, triacylglycerol
- WT, wild type
- α/β-Hydrolase domain-6
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - S.R. Murthy Madiraju
- Corresponding author. Montreal Diabetes Research Center, CRCHUM, 900 St-Denis (Viger Tower), Rm R08-414, Montreal, QC H1W 4A4, Canada. Tel.: +1 514 890 8000x23610; fax: +1 514 412 7648.
| | - Marc Prentki
- Corresponding author. Montreal Diabetes Research Center, CRCHUM, 900 St-Denis (Viger Tower), Rm R08-412, Montreal, QC H1W 4A4, Canada. Tel.: +1 514 890 8000x23642; fax: +1 514 412 7648.
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13
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Kitaura Y, Inoue K, Kato N, Matsushita N, Shimomura Y. Enhanced oleate uptake and lipotoxicity associated with laurate. FEBS Open Bio 2015; 5:485-91. [PMID: 26106523 PMCID: PMC4475777 DOI: 10.1016/j.fob.2015.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/21/2015] [Accepted: 05/26/2015] [Indexed: 12/30/2022] Open
Abstract
Free fatty acids have been reported to induce cell death (lipotoxicity), but the effects depend on the carbon chain length and number of double bonds. Medium-chain saturated fatty acids (MC-SFAs), such as laurate, have less lipotoxicity than long-chain saturated fatty acids (LC-SFAs), such as palmitate. Monounsaturated fatty acids, such as oleate, have also been reported not only to exert cytotoxic effects, but also to reduce the lipotoxicity of LC-SFA. However the interaction between MC-SFA and oleate with respect to cell death is unclear. In this report, we found that lipotoxicity was enhanced by a combination of laurate and oleate relative to either fatty acid alone. The possible mechanisms involved were examined by measuring the production of reactive oxygen species, mitochondrial depolarization, caspase-3 activity, and lipid droplet formation. Although the stress signals and cell death pathways were distinct among different cell types, we found a common phenomenon of enhanced lipid droplet formation in all cells tested. Using fluorescent- or radioisotope-labeled fatty acids, we found that oleate, but not laurate, increased the uptake of fluorescent-labeled fatty acids, and the combinatory effect was more efficient than with oleate alone. We also found that laurate increased oleate uptake, but the effect of oleate on laurate uptake varied among cell types. These results suggest that laurate enhances the influx rate of oleate, the increased intracellular concentration of which not only enhances lipid storage, but also induces cell death by lipotoxic stress responses, which vary according to cell type.
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Affiliation(s)
- Yasuyuki Kitaura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Kana Inoue
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Naoki Kato
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Nahomi Matsushita
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Yoshiharu Shimomura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
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14
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Dahlhoff C, Worsch S, Sailer M, Hummel BA, Fiamoncini J, Uebel K, Obeid R, Scherling C, Geisel J, Bader BL, Daniel H. Methyl-donor supplementation in obese mice prevents the progression of NAFLD, activates AMPK and decreases acyl-carnitine levels. Mol Metab 2014; 3:565-80. [PMID: 25061561 PMCID: PMC4099513 DOI: 10.1016/j.molmet.2014.04.010] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/25/2014] [Accepted: 04/30/2014] [Indexed: 12/31/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) results from increased hepatic lipid accumulation and steatosis, and is closely linked to liver one-carbon (C1) metabolism. We assessed in C57BL6/N mice whether NAFLD induced by a high-fat (HF) diet over 8 weeks can be reversed by additional 4 weeks of a dietary methyl-donor supplementation (MDS). MDS in the obese mice failed to reverse NAFLD, but prevented the progression of hepatic steatosis associated with major changes in key hepatic C1-metabolites, e.g. S-adenosyl-methionine and S-adenosyl-homocysteine. Increased phosphorylation of AMPK-α together with enhanced β-HAD activity suggested an increased flux through fatty acid oxidation pathways. This was supported by concomitantly decreased hepatic free fatty acid and acyl-carnitines levels. Although HF diet changed the hepatic phospholipid pattern, MDS did not. Our findings suggest that dietary methyl-donors activate AMPK, a key enzyme in fatty acid β-oxidation control, that mediates increased fatty acid utilization and thereby prevents further hepatic lipid accumulation.
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Key Words
- 3-HB, β-hydroxybutyrate
- ACC, acetyl-CoA carboxylase
- AMP-activated protein kinase
- AMPK, AMP-activated protein kinase
- ANT, adenine nucleotide translocase
- Acyl-carnitines
- Bhmt, betaine-homocysteine methyltransferase
- C, control diet
- C1, one-carbon
- CACT, carnitine-acylcarnitine transporter
- CMS, methyl-donor supplemented control diet
- Cbs, cystathionine β-synthase
- Cpt1a, carnitine palmitoyltransferase-1a
- DIO, diet-induced obesity
- Fasn, fatty acid synthase
- GNMT, glycine N-methyltransferase
- Gapdh, glyceraldehyde 3-phosphate dehydrogenase
- HF, high-fat diet
- HFMS, methyl-donor supplemented high-fat diet
- HMW adiponectin, high molecular weight adiponectin
- HSP90, heat shock protein 90
- Hcy, homocysteine
- Hepatic steatosis
- Hprt1, hypoxanthine phosphoribosyltransferase 1
- LDL, low density lipoprotein
- MAT, methionine adenosyltransferase
- MCD, malonyl-CoA decarboxylase
- MDS, methyl-donor supplementation
- MTR, methionine synthase
- NAFLD, non-alcoholic fatty liver disease
- NEFA, non-esterified fatty acids
- Obesity
- One-carbon metabolism
- PC, phosphatidylcholine
- PGC1α, peroxisome proliferator-activated receptor-γ co-activator-1α
- PL, phospholipids
- PPARα, peroxisome proliferator-activated receptor-α
- Pemt, phosphatidylethanolamine methyltransferase
- SAH, S-adenosylhomocysteine
- SAM, S-adenosylmethionine
- SM, sphingomyelin
- SREBP1c, sterol regulatory element-binding protein-1c
- TG, triacylglycerol
- VAT, visceral adipose tissue
- VLDL, very low density lipoprotein
- β-HAD, β-hydroxyacyl CoA dehydrogenase
- β-oxidation
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Affiliation(s)
- Christoph Dahlhoff
- Biochemistry Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany ; PhD Group - Epigenetics, Imprinting and Nutrition, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Stefanie Worsch
- Nutritional Medicine Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Manuela Sailer
- Biochemistry Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Björn A Hummel
- Clinical Chemistry and Laboratory Medicine/Central Laboratory, University Hospital of the Saarland, 66421 Homburg, Germany ; Clinical Haemostasiology and Transfusion Medicine, University Hospital of the Saarland, 66421 Homburg, Germany
| | - Jarlei Fiamoncini
- Biochemistry Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Kirsten Uebel
- Nutritional Medicine Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Rima Obeid
- Clinical Chemistry and Laboratory Medicine/Central Laboratory, University Hospital of the Saarland, 66421 Homburg, Germany
| | - Christian Scherling
- Biochemistry Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Jürgen Geisel
- Clinical Chemistry and Laboratory Medicine/Central Laboratory, University Hospital of the Saarland, 66421 Homburg, Germany
| | - Bernhard L Bader
- PhD Group - Epigenetics, Imprinting and Nutrition, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany ; Nutritional Medicine Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Hannelore Daniel
- Biochemistry Unit, Research Center for Nutrition and Food Sciences (ZIEL), Technische Universität München, 85350 Freising-Weihenstephan, Germany
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15
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Nishikawa K, Hashimoto M, Itoh Y, Hiroi S, Kusai A, Hirata F, Sakamoto T, Iwaya K. Detection of changes in the structure and distribution map of triacylglycerol in fatty liver model by MALDI-SpiralTOF. FEBS Open Bio 2014; 4:179-84. [PMID: 24649399 PMCID: PMC3953719 DOI: 10.1016/j.fob.2014.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/29/2014] [Accepted: 02/06/2014] [Indexed: 11/27/2022] Open
Abstract
MS/MS and imaging mass spectrometry analysis (IMS) were used to estimate mouse fatty liver. Triacylglycerol (TG) structure and distribution were measured using MS/MS and IMS. The most intense mass spectrum ion was indicated by IMS at m/z 881.7 (52:2). MS/MS showed a structural change between liver TG and dietary TG. MALDI-SpiralTOF with IMS could be a powerful tool for clinical screening of fatty liver.
Matrix-assisted laser desorption/ionisation spiral orbit-type time-of-flight mass spectrometry (MALDI-SpiralTOF) can analyse lipid profiles and characterise lipid structure. Imaging mass spectrometry (IMS) also provides distribution maps of selected m/z values. Here, we investigated triacylglycerol (TG) structure and distribution using these technologies to estimate mouse fatty liver. The distribution and intensity of the most intense mass spectrum ion was indicated by IMS at m/z 881.7 (52:2). Analysis using MS/MS showed a structural change between liver TG and dietary TG. These findings suggest that MALDI-SpiralTOF is a powerful tool for clinical screening and estimating fatty liver.
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Affiliation(s)
- Kahoko Nishikawa
- Department of Traumatology and Critical Care Medicine, National Defense Medical College, Saitama 359-8513, Japan
| | | | | | - Sadayuki Hiroi
- Department of Laboratory Medicine, National Defense Medical College, Saitama 359-8513, Japan
| | | | - Fumihiko Hirata
- Japan Self Defense Forces Hospital Yokosuka, Kanagawa 237-0071, Japan
| | - Toshihisa Sakamoto
- Department of Traumatology and Critical Care Medicine, National Defense Medical College, Saitama 359-8513, Japan
| | - Keiichi Iwaya
- Department of Pathology, National Defense Medical College, Saitama 359-8513, Japan
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16
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Kim JH, Meyers MS, Khuder SS, Abdallah SL, Muturi HT, Russo L, Tate CR, Hevener AL, Najjar SM, Leloup C, Mauvais-Jarvis F. Tissue-selective estrogen complexes with bazedoxifene prevent metabolic dysfunction in female mice. Mol Metab 2014; 3:177-90. [PMID: 24634829 DOI: 10.1016/j.molmet.2013.12.009] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 12/20/2013] [Accepted: 12/21/2013] [Indexed: 12/11/2022] Open
Abstract
Pairing the selective estrogen receptor modulator bazedoxifene (BZA) with estrogen as a tissue-selective estrogen complex (TSEC) is a novel menopausal therapy. We investigated estrogen, BZA and TSEC effects in preventing diabetisity in ovariectomized mice during high-fat feeding. Estrogen, BZA or TSEC prevented fat accumulation in adipose tissue, liver and skeletal muscle, and improved insulin resistance and glucose intolerance without stimulating uterine growth. Estrogen, BZA and TSEC improved energy homeostasis by increasing lipid oxidation and energy expenditure, and promoted insulin action by enhancing insulin-stimulated glucose disposal and suppressing hepatic glucose production. While estrogen improved metabolic homeostasis, at least partially, by increasing hepatic production of FGF21, BZA increased hepatic expression of Sirtuin1, PPARα and AMPK activity. The metabolic benefits of BZA were lost in estrogen receptor-α deficient mice. Thus, BZA alone or in TSEC produces metabolic signals of fasting and caloric restriction and improves energy and glucose homeostasis in female mice.
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Key Words
- AMPKα, AMP-activated protein kinase α
- AUC, area-under the curve
- Akt, protein kinase B
- BAT, brown adipose tissue
- BZA, bazedoxifene
- Bazedoxifene
- CE, conjugated equine estrogens
- E2, 17β-estradiol
- ER, estrogen receptor
- FAS, fatty acid synthase
- FGF21, fibroblast growth factor 21
- GIR, glucose infusion rate
- H&E, hematoxylin and eosin
- HFD, high-fat diet
- HGP, hepatic glucose production
- ITT, insulin tolerance test
- Insulin resistance
- LPL, lipoprotein lipase
- Lcn2, lipocalin 2
- Menopause
- Metabolic syndrome
- NAFLD, non-alcoholic fatty liver disease
- OGTT, oral glucose tolerance test
- OVX, ovariectomy
- PTT, pyruvate tolerance test
- RBP4, retinol binding protein 4
- RER, respiratory exchange ratio
- Rd, rate of whole-body glucose disappearance
- SERM, selective estrogen receptor modulator
- TBARS, thiobarbituric acid reactive substances
- TG, triacylglycerol
- TSEC, tissue-selective estrogen complex
- Tissue-selective estrogen complexes
- Type 2 diabetes
- UCPs, uncoupling proteins
- VO2, oxygen consumption
- WAT, white adipose tissue.
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Affiliation(s)
- Jun Ho Kim
- Department of Medicine, Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Matthew S Meyers
- Department of Medicine, Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Saja S Khuder
- Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Simon L Abdallah
- Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Harrison T Muturi
- Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Lucia Russo
- Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Chandra R Tate
- Department of Medicine, Division of Endocrinology and Metabolism, Tulane University Health Sciences Center, School of Medicine, New Orleans, LA 70112, USA
| | - Andrea L Hevener
- Department of Medicine, Division of Endocrinology, Diabetes and Hypertension, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Sonia M Najjar
- Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Corinne Leloup
- Department of Medicine, Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Franck Mauvais-Jarvis
- Department of Medicine, Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA ; Department of Medicine, Division of Endocrinology and Metabolism, Tulane University Health Sciences Center, School of Medicine, New Orleans, LA 70112, USA
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