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Martins BC, da Silva Ribeiro M, Teixeira AVS, Peixoto TC, Lisboa PC, Martins FF, Souza-Mello V, Daleprane JB. Consumption of interesterified palm oil leads inflammation of white adipose tissue and triggers metabolic disturbances in mice on a high-fat diet. Sci Rep 2024; 14:12530. [PMID: 38822155 PMCID: PMC11143230 DOI: 10.1038/s41598-024-63488-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 05/29/2024] [Indexed: 06/02/2024] Open
Abstract
Growing obesity is linked to shifts in dietary patterns, particularly the increased intake of ultra-processed high-fat foods. This study aimed to evaluate the effects of interesterified palm oil consumption on glucose homeostasis, adipose tissue remodeling, and hepatic lipogenesis in C57BL/6 mice fed a high-fat diet. Sixty C57BL/6 mice were divided into four groups (n = 15): the control group (C) fed a standard diet (4% soybean oil), the high-fat group (HF) (23.8% lard), the high palm oil fat group (HFP) (23.8% palm oil), and the high interesterified palm fat group (HFI) (23.8% interesterified palm oil) for 8 weeks (all groups received 50% energy from lipids). The HFI group exhibited higher body mass than the HF group (+ 11%, P < 0.05), which was attributed to an increased percentage of fat mass. Plasma concentrations of IL-6, insulin, and HOMA-IR were also elevated in the HFI group. Both the HFP and HFI groups showed hypertrophied adipocytes and pancreatic islets, increased alpha and beta cell masses, hepatic steatosis, low expression of genes related to beta-oxidation, and upregulated lipogenesis. In conclusion, the consumption of interesterified palm oil alters inflammatory and glucose profiles.
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Affiliation(s)
- Bruna Cadete Martins
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Mayara da Silva Ribeiro
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Ananda Vitoria Silva Teixeira
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Thamara Cherem Peixoto
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Patrícia Cristina Lisboa
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, State University of Rio de Janeiro, Rio de Janeiro, RJ, 20551-030, Brazil
| | - Fabiane Ferreira Martins
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil
- Department of Morphology, Federal University of Rio Grande Do Norte, Rio Grande do Norte, Brazil
| | - Vanessa Souza-Mello
- Laboratory of Morphometry, Metabolism and Cardiovascular Diseases, Biomedical Center, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Julio Beltrame Daleprane
- Laboratory for Studies of Interactions Between Nutrition and Genetics, LEING, Department of Basic and Experimental Nutrition, Rio de Janeiro State University, Rio de Janeiro, Brazil.
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Bae S, Moon YA. Deletion of Elovl5 leads to dyslipidemia and atherosclerosis in LDLR-deficient mice. Biochem Biophys Res Commun 2024; 690:149292. [PMID: 38000296 DOI: 10.1016/j.bbrc.2023.149292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Atherosclerosis is a chronic inflammatory disease for which hepatic steatosis and atherogenic dyslipidemia are significant risk factors. We investigated the effects of endogenously generated very-long-chain polyunsaturated fatty acids (VL-PUFAs) on dyslipidemia and atherosclerosis development using mice that lack ELOVL5, a PUFA elongase that is required for the synthesis of arachidonic acid, EPA, and DHA from the essential fatty acids linoleic and linolenic acids, and the LDL receptor (LDLR). Elovl5-/-;Ldlr-/- mice manifest increased liver triglyceride and cholesterol concentrations due to the activation of sterol regulatory element binding protein-1, a transcription factor that activates enzymes required for de novo lipogenesis. Plasma levels of triglycerides and cholesterol in VLDL, IDL, and LDL were markedly elevated in Elovl5-/-;Ldlr-/- mice fed a chow and the mice exhibited marked aortic atherosclerotic plaques. Bone marrow-derived monocytes from wild-type (WT) and Elovl5-/- mice were polarized to M1 and M2 macrophages, and the effects of ELOVL5 on inflammatory activity were determined. There were no differences in most of the markers tested for M1 and M2 polarized cells between WT and Elovl5-/- cells, except for a slight increase in PGE2 secretion in Elovl5-/- cells, likely due to elevated Cox-2 expression. These results suggest that the deletion of Elovl5 leads to hepatic steatosis and dyslipidemia, which are the major factors in severe atherosclerosis in Elovl5-/-;Ldlr-/- mice.
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Affiliation(s)
- Sijeong Bae
- Department of Molecular Medicine, Inha University College of Medicine, Incheon, South Korea
| | - Young-Ah Moon
- Department of Molecular Medicine, Inha University College of Medicine, Incheon, South Korea.
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Nagarajan M, Maadurshni GB, Manivannan J. Bisphenol A (BPA) exposure aggravates hepatic oxidative stress and inflammatory response under hypertensive milieu - Impact of low dose on hepatocytes and influence of MAPK and ER stress pathways. Food Chem Toxicol 2024; 183:114197. [PMID: 38029875 DOI: 10.1016/j.fct.2023.114197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 10/27/2023] [Accepted: 11/16/2023] [Indexed: 12/01/2023]
Abstract
Human exposure to the hazardous chemical, Bisphenol A (BPA), is almost ubiquitous. Due to the prevalence of hypertension (CVD risk factor) in the aged human population, it is necessary to explore its adverse effect in hypertensive subjects. The current study exposed the Nω-nitro-l-arginine methyl ester (L-NAME) induced hypertensive Wistar rats to human exposure relevant low dose of BPA (50 μg/kg) for 30 days period. The liver biochemical parameters, histopathology, immunohistochemistry, gene expression (RT-qPCR), trace elements (ICP-MS), primary rat hepatocytes cell culture and metabolomic (1H NMR) assessments were performed. Results illustrate that BPA exposure potentiates/aggravates hypertension induced tissue abnormalities (hepatic fibrosis), oxidative stress, ACE activity, malfunction of the antioxidant system, lipid abnormalities and inflammatory factor (TNF-α and IL-6) expression. Also, in cells, BPA increased ROS generation, mitochondrial dysfunction and lipid peroxidation without any impact on cytotoxicity and caspase 3 and 9 activation. Notably, BPA exposure modulate lipid metabolism (cholesterol and fatty acid) in primary hepatocytes. Finally, the influence of ERK1/2, p38MAPK, ER stress and oxidative stress during relatively high dose of BPA elicited cytotoxicity was observed. Therefore, a precise hazardous risk investigation of BPA exposure in hypertensive populations is highly recommended.
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Affiliation(s)
- Manikandan Nagarajan
- Environmental Health and Toxicology Laboratory, Department of Environmental Sciences, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | | | - Jeganathan Manivannan
- Environmental Health and Toxicology Laboratory, Department of Environmental Sciences, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India.
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Lee SJ, Choi SE, Park S, Hwang Y, Son Y, Kang Y. CD38 Inhibition Protects Fructose-Induced Toxicity in Primary Hepatocytes. Mol Cells 2023; 46:496-512. [PMID: 37497588 PMCID: PMC10440271 DOI: 10.14348/molcells.2023.0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 07/28/2023] Open
Abstract
A fructose-enriched diet is thought to contribute to hepatic injury in developing non-alcoholic steatohepatitis (NASH). However, the cellular mechanism of fructose-induced hepatic damage remains poorly understood. This study aimed to determine whether fructose induces cell death in primary hepatocytes, and if so, to establish the underlying cellular mechanisms. Our results revealed that treatment with high fructose concentrations for 48 h induced mitochondria-mediated apoptotic death in mouse primary hepatocytes (MPHs). Endoplasmic reticulum stress responses were involved in fructose-induced death as the levels of phosho-eIF2α, phospho-C-Jun-N-terminal kinase (JNK), and C/EBP homologous protein (CHOP) increased, and a chemical chaperone tauroursodeoxycholic acid (TUDCA) prevented cell death. The impaired oxidation metabolism of fatty acids was also possibly involved in the fructose-induced toxicity as treatment with an AMP-activated kinase (AMPK) activator and a PPAR-α agonist significantly protected against fructose-induced death, while carnitine palmitoyl transferase I inhibitor exacerbated the toxicity. However, uric acid-mediated toxicity was not involved in fructose-induced death as uric acid was not toxic to MPHs, and the inhibition of xanthine oxidase (a key enzyme in uric acid synthesis) did not affect cell death. On the other hand, treatment with inhibitors of the nicotinamide adenine dinucleotide (NAD)+-consuming enzyme CD38 or CD38 gene knockdown significantly protected against fructose-induced toxicity in MPHs, and fructose treatment increased CD38 levels. These data suggest that CD38 upregulation plays a role in hepatic injury in the fructose-enriched diet-mediated NASH. Thus, CD38 inhibition may be a promising therapeutic strategy to prevent fructose-enriched diet-mediated NASH.
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Affiliation(s)
- Soo-Jin Lee
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Sung-E Choi
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Seokho Park
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Yoonjung Hwang
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Youngho Son
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
| | - Yup Kang
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea
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Asghar HA, Syed QA, Shukat R, Israr B. EXPLORING the prophylactic potential of Azadirachta indica leaf extract against dyslipidemia. JOURNAL OF ETHNOPHARMACOLOGY 2023; 303:116008. [PMID: 36521768 DOI: 10.1016/j.jep.2022.116008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 08/26/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Several studies revealed that different parts of Azadirachta indica A. Juss, has therapeutic potential against inflammatory issues and dyslipidemia which is a major contributing cause to cardiovascular diseases, oxidative stress and serum glucose levels, etc. AIM OF STUDY: Present study was conducted to evaluate anti-dyslipidemic capacity of Azadirachta indica leaf extract in dyslipidemic rabbits. MATERIALS AND METHODS Ethanolic extract of Azadirachta indica leaves was obtained by using Soxhlet apparatus. This extract was used for efficacy study on rabbits. In this context, 25 healthy rabbits were selected for study, Efficacy trial involved five groups of rabbits, 5 rabbits in each group; NC (Negative Control); healthy rabbits received normal diet. In remaining 20 rabbits, dyslipidemia was induced by using high fat diet for 28 days followed by administration of Azadirachta indica leaf ethanolic extract for 60 days in a dose-dependent manner. PC (Positive Control) include dyslipidemic rabbits received normal diet while G1, G2, G3 groups included dyslipidemic rabbits receiving different concentrations of Azadirachta indica leaf extract (i.e. 300, 500 and 700 mg/kg of body weight, respectively). Blood samples were analyzed for serum lipid profile after every 15 days to determine the effect of treatments. RESULTS Significant reduction in total cholesterol (60 ± 3.4 mg/dL), triglycerides (40.31 ± 2.5 mg/dL) and low-density lipoprotein (28.87 ± 2.1 mg/dL) was observed in G2 (P ≤ 0.05)while a significant increase was observed in high-density lipoprotein (60.47 ± 1.7 mg/dL) of G2 (P ≤ 0.05) as compared to other groups. CONCLUSION Results revealed that ethanolic extract of Azadirachta indica leaves in G2 group (@ 500 mg/kg of body weight) normalized lipid profile in dyslipidemic rabbits after 60 days of extract administration which significantly lowered TC, TG, LDL levels (P ≤ 0.05) and improved HDL level.
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Affiliation(s)
- Hafiza Anam Asghar
- National Institute of Food Science & Technology, Faculty of Food, Nutrition and Home Sciences, University of Agriculture, Faisalabad, Pakistan.
| | - Qamar Abbas Syed
- National Institute of Food Science & Technology, Faculty of Food, Nutrition and Home Sciences, University of Agriculture, Faisalabad, Pakistan.
| | - Rizwan Shukat
- National Institute of Food Science & Technology, Faculty of Food, Nutrition and Home Sciences, University of Agriculture, Faisalabad, Pakistan.
| | - Beenish Israr
- Institute of Home Sciences, Faculty of Food, Nutrition and Home Sciences, University of Agriculture, Faisalabad, Pakistan.
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Zhou F, Yang L, Sun W, Wang X, Guo N, Ma H, Yang L. The PPARα/CYP4A14 bile acid pathway is associated with lipid metabolism disorders caused by low birth weight with high-fat diet. Food Nutr Res 2023; 67:8994. [PMID: 36794015 PMCID: PMC9899044 DOI: 10.29219/fnr.v67.8994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/14/2022] [Accepted: 11/04/2022] [Indexed: 01/25/2023] Open
Abstract
Purpose To investigate possible mechanisms underlying the greater susceptibility of lipid metabolism disorders in low birth weight (LBW) mice fed with high-fat diets (HFDs). Methods LBW mice model was established by using the pregnancy malnutrition method. Male pups were selected from LBW and normal-birth weight (NBW) offspring at random. After 3 weeks of weaning, all offspring mice were fed with HFD. Serum triglycerides (TGs), cholesterol (TC), low density lipoprotein (LDL-C), total bile acid (TAB), non-esterified fatty acid (NEFA), and mice fecal bile acid profiles were measured. Lipid deposition in liver sections was visualized by Oil Red O staining. The weight ratio of liver, muscle, and adiposity was calculated. Tandem mass tag (TMT) combined with LC-MS/MS was used to determine the differentially expressed proteins (DEPs) of liver tissue in two groups. Bioinformatics was used for further analysis of DEPs to screen key target proteins, and then Western Blot (WB) and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) were performed to validate the expressions of DEPs. Results LBW mice fed with HFD showed more severe lipid metabolism disorders in the childhood. In contrast to the NBW group, the serum bile acids and fecal ω-muricholic acid (ω-MCA) levels in the LBW group were significantly lower. LC-MS/MS analysis showed that downregulated proteins were associated with lipid metabolism, and further analysis found that these proteins are mainly concentrated in peroxisome proliferation-activated receptor (PPAR) and primary bile acid synthesis signaling pathways and are involved in cellular processes and metabolic processes through binding and catalytic functions. Bioinformatics analysis indicated that the level of Cytochrome P450 Family 46 Subfamily A Member 1 (CYP46A1), PPARα, key factors of cholesterol metabolism and bile acid synthesis, as well as downstream molecules Cytochrome P450 Family 4 Subfamily A Member 14 (CYP4A14), and Acyl-Coenzyme A Oxidase 2 (ACOX2) are markedly different in the liver of LBW individuals fed with HFD, and confirmed by WB and RT-qPCR. Conclusion LBW mice are more prone to dyslipidemia probably due to downregulated bile acid metabolism-related PPARα/CYP4A14 pathway, resulting in insufficient metabolism of cholesterol to bile acids, which, in turn, leads to elevated blood cholesterol.
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Affiliation(s)
- Fei Zhou
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, China,Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China
| | - Linquan Yang
- Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China
| | - Wenwen Sun
- Department of Internal Medicine, North China University of Science and Technology, Tangshan, China
| | - Xing Wang
- Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China
| | - Na Guo
- Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China
| | - Huijuan Ma
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, China,Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China,Department of Endocrinology, Hebei General Hospital, Shijiazhuang, China,Huijuan Ma Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, Hebei, China.
| | - Linlin Yang
- Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, China,Linlin Yang Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, Hebei, China.
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Kord-Varkaneh H, Salehi-Sahlabadi A, Tinsley GM, Santos HO, Hekmatdoost A. Effects of time-restricted feeding (16/8) combined with a low-sugar diet on the management of non-alcoholic fatty liver disease: A randomized controlled trial. Nutrition 2023; 105:111847. [PMID: 36257081 DOI: 10.1016/j.nut.2022.111847] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/23/2022] [Accepted: 09/05/2022] [Indexed: 10/14/2022]
Abstract
OBJECTIVES Emerging studies have employed time-restricted feeding (TRF) and a low-sugar diet alone in the management of non-alcoholic fatty liver disease (NAFLD), but their combination has not been tested. The aim of this study was to investigate the effects of TRF combined with a low-sugar diet on NAFLD parameters, cardiometabolic and inflammatory biomarkers, and body composition in patients with NAFLD. METHODS A 12-wk randomized controlled trial was performed to compare the effects of TRF (16 h fasting/8 h feeding daily [16/8]) plus a low-sugar diet versus a control diet based on traditional meal distribution in patients with NAFLD. Changes in body composition, anthropometric indices, and liver and cardiometabolic markers were investigated. RESULTS TRF 16/8 with a low-sugar diet reduced body fat (26.7 ± 5.4 to 24.2 ± 4.9 kg), body weight (83.8 ± 12.7 to 80.5 ± 12.1 kg), waist circumference (104.59 ± 10.47 to 101.91 ± 7.42 cm), and body mass index (29.1 ± 2.6 to 28 ± 2.7 kg/m2), as well as circulating levels of fasting blood glucose and liver (alanine aminotransferase, 34 ± 13.9 to 21.2 ± 5.4 U/L; aspartate aminotransferase, 26.3 ± 6.2 to 20.50 ± 4 U/L; γ-glutamyl transpeptidase, 33 ± 15 to 23.2 ± 11.1 U/L; fibrosis score, 6.3 ± 1 to 5.2 ± 1.2 kPa; and controlled attenuation parameter, 322.9 ± 34.9 to 270.9 ± 36.2 dB/m), lipids (triacylglycerols, 201.5 ± 35.3 to 133.3 ± 48.7 mg/dL; total cholesterol, 190 ± 36.6 to 157.8 ± 33.6 mg/dL; and low-density lipoprotein cholesterol, 104.6 ± 27.3 to 84 ± 26.3 mg/dL), and inflammatory markers (high-sensitivity C-reactive protein, 3.1 ± 1.1 to 2 ± 0.9 mg/L; and cytokeratin-18, 1.35 ± 0.03 to 1.16 ± 0.03 ng/mL). These results were statistically significant (P < 0.05) compared with the control group. CONCLUSIONS TRF plus a low-sugar diet can reduce adiposity and improve liver, lipid, and inflammatory markers in patients with NAFLD.
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Affiliation(s)
- Hamed Kord-Varkaneh
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ammar Salehi-Sahlabadi
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Grant M Tinsley
- Department of Kinesiology & Sport Management, Texas Tech University, Lubbock, Texas, USA
| | - Heitor O Santos
- School of Medicine, Federal University of Uberlandia (UFU), Uberlandia, Minas Gerais, Brazil
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Godoy-Lugo JA, Mendez DA, Rodriguez R, Nishiyama A, Nakano D, Soñanez-Organis JG, Ortiz RM. Improved lipogenesis gene expression in liver is associated with elevated plasma angiotensin 1-7 after AT1 receptor blockade in insulin-resistant OLETF rats. Mol Cell Endocrinol 2022; 555:111729. [PMID: 35921918 DOI: 10.1016/j.mce.2022.111729] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 07/18/2022] [Accepted: 07/21/2022] [Indexed: 11/19/2022]
Abstract
Increased angiotensin II (Ang II) signaling contributes to insulin resistance and liver steatosis. In addition to ameliorating hypertension, angiotensin receptor blockers (ARBs) improve lipid metabolism and hepatic steatosis, which are impaired with metabolic syndrome (MetS). Chronic blockade of the Ang II receptor type 1 (AT1) increases plasma angiotensin 1-7 (Ang 1-7), which mediates mechanisms counterregulatory to AT1 signaling. Elevated plasma Ang 1-7 is associated with decreased plasma triacylglycerol (TAG), cholesterol, glucose, and insulin; however, the benefits of RAS modulation to prevent non-alcoholic fatty liver disease (NAFLD) are not fully investigated. To better address the relationships among chronic ARB treatment, plasma Ang 1-7, and hepatic steatosis, three groups of 10-week-old-rats were studied: (1) untreated lean Long Evans Tokushima Otsuka (LETO), (2) untreated Otsuka Long Evans Tokushima Fatty (OLETF), and (3) OLETF + ARB (ARB; 10 mg olmesartan/kg/d × 6 weeks). Following overnight fasting, rats underwent an acute glucose load to better understand the dynamic metabolic responses during hepatic steatosis and early MetS. Tissues were collected at baseline (pre-load; T0) and 1 and 2 h post-glucose load. AT1 blockade increased plasma Ang 1-7 and decreased liver lipids, which was associated with decreased fatty acid transporter 5 (FATP5) and fatty acid synthase (FASN) expression. AT1 blockade decreased liver glucose and increased glucokinase (GCK) expression. These results demonstrate that during MetS, overactivation of AT1 promotes hepatic lipid deposition that is stimulated by an acute glucose load and lipogenesis genes, suggesting that the chronic hyperglycemia associated with MetS contributes to fatty liver pathologies via an AT1-mediated mechanism.
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Affiliation(s)
- Jose A Godoy-Lugo
- School of Natural Sciences, University of California, Merced, CA, USA.
| | - Dora A Mendez
- School of Natural Sciences, University of California, Merced, CA, USA
| | - Ruben Rodriguez
- School of Natural Sciences, University of California, Merced, CA, USA
| | - Akira Nishiyama
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan
| | - Daisuke Nakano
- Department of Pharmacology, Kagawa University Medical School, Kagawa, Japan
| | - Jose G Soñanez-Organis
- Universidad de Sonora, Departamento de Ciencias Químico Biológicas y Agropecuarias, Navojoa, Sonora, Mexico
| | - Rudy M Ortiz
- School of Natural Sciences, University of California, Merced, CA, USA
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Abstract
Non-alcoholic fatty liver disease (NAFLD) is a common disease defined by excess fat deposition in the liver. The course of NAFLD is not fully understood, however, some pathogenic mechanisms have been identified. Accumulation of fat in liver cells is associated with insulin resistance, central obesity, triglyceride accumulation in the liver and hepatic fatty acid metabolism dysregulation that cause steatosis. The other process leads to hepatocyte inflammation and necrosis, which leads to severe hepatic disease; non-alcoholic steatohepatitis. Many clinical studies have underlined the link between NAFLD and atherosclerosis. NAFLD may alter the balance lipid-glucose metabolism as well as increase the risk of hypertension and systemic inflammation. This results in a greater risk of vascular events. The present review considers the link between NAFLD and atherosclerosis.
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Affiliation(s)
- Sevket Balta
- Department of Cardiology, Hayat Hospital, Malatya, Turkey
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10
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Chai T, Wang Z, Yang X, Qiu Z, Chen L. PSRC1 May Affect Coronary Artery Disease Risk by Altering CELSR2, PSRC1, and SORT1 Gene Expression and Circulating Granulin and Apolipoprotein B Protein Levels. Front Cardiovasc Med 2022; 9:763015. [PMID: 35252377 PMCID: PMC8896401 DOI: 10.3389/fcvm.2022.763015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/27/2022] [Indexed: 12/23/2022] Open
Abstract
Objective The aim of the study was to identify additional factors that contributed to coronary artery disease (CAD). Methods We conducted integrative analysis on publicly available data from genome-wide association studies and quantitative trait locus studies by employing Mendelian randomization methods to examine the associations of gene expression in liver cells and circulating protein levels with LDL-C and CAD. Results We found that the mRNA expression levels of CELSR2, PSRC1, SORT1, SYPL2, RHD, RHCE, ANGPTL3, ATXN7L2, DNAH11, FADS3, ST3GAL4, NYNRIN, CETP, EFCAB13, and SPTLC3 were significantly associated with LDL-C. The expression levels of SORT1, PSRC1, and CELSR2 in liver cells were significantly associated with CAD. Higher expression levels of SORT1, PSRC1, and CELSR2 in the liver were significantly associated with lower circulating LDL-C levels and CAD risk. PSRC1 variants were strongly associated with SORT1, PSRC1, and CELSR2 gene expression in liver cells. Higher circulating granulin and apolipoprotein B levels, which were strongly affected by PSRC1 variants, were significantly associated with higher LDL-C levels and CAD risk, with odds ratios of 1.15 (1.10–1.19) and 1.45 (1.21–1.74), respectively. Conclusion This study showed that regulatory SNPs in PSRC1 may affect CAD risk by altering CELSR2, PSRC1, and SORT1 gene expression in liver cells and circulating granulins and apolipoprotein B proteins.
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Affiliation(s)
- Tianci Chai
- Department of Cardiovascular Surgery, Fujian Medical University Union Hospital, Fuzhou, China
- Key Laboratory of Cardio-Thoracic Surgery (Fujian Medical University), Fujian Province University, Fuzhou, China
- Department of Anesthesiology, Xinyi People's Hospital, Xuzhou, China
| | - Zhisheng Wang
- The Affiliated Longyan First Hospital of Fujian Medical University, Longyan, China
| | - Xiaojie Yang
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Zhihuang Qiu
- Department of Cardiovascular Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Liangwan Chen
- Department of Cardiovascular Surgery, Fujian Medical University Union Hospital, Fuzhou, China
- *Correspondence: Liangwan Chen
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Wu D, Gu M, Wei Z, Bai C, Su G, Liu X, Zhao Y, Yang L, Li G. Myostatin Knockout Regulates Bile Acid Metabolism by Promoting Bile Acid Synthesis in Cattle. Animals (Basel) 2022; 12:ani12020205. [PMID: 35049827 PMCID: PMC8772948 DOI: 10.3390/ani12020205] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/01/2022] [Accepted: 01/11/2022] [Indexed: 02/06/2023] Open
Abstract
Myostatin (MSTN) is a major negative regulator of skeletal muscle mass and causes a variety of metabolic changes. However, the effect of MSTN knockout on bile acid metabolism has rarely been reported. In this study, the physiological and biochemical alterations of serum in MSTN+/- and wild type (WT) cattle were investigated. There were no significant changes in liver and kidney biochemical indexes. However, compared with the WT cattle, lactate dehydrogenase, total bile acid (TBA), cholesterol, and high-density lipoprotein (HDL) in the MSTN+/- cattle were significantly increased, and glucose, low-density lipoprotein (LDL), and triglycerides (TG) were significantly decreased, indicating that MSTN knockout affected glucose and lipid metabolism and total bile acids content. Targeted metabolomic analysis of the bile acids and their derivatives was performed on serum samples and found that bile acids were significantly increased in the MSTN+/- cattle compared with the WT cattle. As the only bile acid synthesis organ in the body, we performed metabolomic analysis on the liver to study the effect of MSTN knockout on hepatic metabolism. Metabolic pathway enrichment analysis of differential metabolites showed significant enrichment of the primary bile acid biosynthesis and bile secretion pathway in the MSTN+/- cattle. Targeted metabolomics data further showed that MSTN knockout significantly increased bile acid content in the liver, which may have resulted from enhanced bile acid synthesis due to the expression of bile acid synthesis genes, cholesterol 7 alpha-hydroxylase (CYP7A1) and sterol 27-hydroxylase (CYP27A1), and upregulation in the liver of the MSTN+/- cattle. These results indicate that MSTN knockout does not adversely affect bovine fitness but regulates bile acid metabolism via enhanced bile acid synthesis. This further suggests a role of MSTN in regulating metabolism.
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Xu S, Wang Y, Li Z, Hua Q, Jiang M, Fan X. LncRNA GAS5 Knockdown Mitigates Hepatic Lipid Accumulation via Regulating MiR-26a-5p/PDE4B to Activate cAMP/CREB Pathway. Front Endocrinol (Lausanne) 2022; 13:889858. [PMID: 35957809 PMCID: PMC9361042 DOI: 10.3389/fendo.2022.889858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/23/2022] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Non-alcoholic fatty liver disease (NAFLD) can be attributed to the dysregulation of hepatic lipid metabolism; however, its cellular and molecular mechanisms remain unclear. This study aims to explore the effect of long non-coding RNA growth arrest specific 5 (GAS5) on hepatic lipid metabolism in fatty liver models. METHODS Obese mice, high fat diet-fed mice and free fatty acid-stimulated cells were used for GAS5 expression detection. GAS5 overexpression or knockdown models were established to elucidate the regulatory function of GAS5 in de novo lipogenesis (DNL) and mitochondrial function. Bioinformatic analyses and dual luciferase assays were used to investigate the interaction between GAS5, miR-26a-5p and phosphodiesterase (PDE) 4B. The involvement of the cyclic adenosine monophosphate (cAMP)/cAMP-response element-binding protein (CREB) pathway was evaluated using H89 and forskolin treatment. RESULTS GAS5 was activated in vitro and in vivo fatty liver models. Knockdown of GAS5 reduced lipid droplet accumulation, DNL associated enzymes and preserved mitochondrial function, while GAS5 overexpression exacerbated hepatic lipid accumulation. Mechanistically, GAS5 sponged miR-26a-5p to increase PDE4B expression and subsequently modulated DNL and mitochondrial function via the cAMP/CREB pathway. CONCLUSION Downregulation of GAS5 can activate the cAMP/CREB pathway through miR-26a-5p/PDE4B axis to mitigate hepatic lipid accumulation. This study provides evidence that downregulation of GAS5 may be a potential therapeutic option for the treatment of NAFLD.
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Affiliation(s)
| | | | | | | | - Miao Jiang
- *Correspondence: Xiaoming Fan, ; Miao Jiang,
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Li J, Qi J, Tang Y, Liu H, Zhou K, Dai Z, Yuan L, Sun C. A nanodrug system overexpressed circRNA_0001805 alleviates nonalcoholic fatty liver disease via miR-106a-5p/miR-320a and ABCA1/CPT1 axis. J Nanobiotechnology 2021; 19:363. [PMID: 34789275 PMCID: PMC8596892 DOI: 10.1186/s12951-021-01108-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/30/2021] [Indexed: 12/22/2022] Open
Abstract
Our study aimed to explore the function of circRNA_0001805 in the pathogenesis of NAFLD and the underlying mechanism. A nanodrug system (GA-RM/GZ/PL) was constructed to overexpress circRNA_0001805 specifically in hepatocytes for the treatment of NAFLD. Fat droplet accumulation in cultured cells and mouse hepatic tissues was detected using Oil Red O or H&E staining. The relative expression of circRNAs, genes associated with lipogenesis was quantified by qRT-PCR. Interactions between circRNA_0001805 and miR-106a-5p/miR-320a, between miR-106a-5p/miR-320a and ABCA1/CPT1 were confirmed by dual-luciferase reporter assay. A novel metalorganic framework nanocarrier (GZ) was prepared from glycyrrhizic acid and zinc ions (Zn2+), and this nanocarrier was loaded with the circRNA_0001805 plasmid to construct a nanocore (GZ/PL). Then, this GZ/PL was coated with a galactose-modified RBC membrane (GA-RM) to generate GA-RM/GZ/PL. CircRNA_0001805 expression was downregulated in FFA-challenged primary hepatocytes, HFD-fed mice and NAFLD patients. Overexpressed circRNA_0001805 attenuated NAFLD development by suppressing lipid metabolism disorder and inflammation. CircRNA_0001805 targeted miR-106a-5p/miR-320a, which served as an upstream inhibitor of ABCA1/CPT1 and collaboratively regulated NAFLD progression. GA-RM/GZ/PL targeted hepatocytes, overexpressed circRNA_0001805, released glycyrrhizic acid to reduce the accumulation of lipids in the liver and played a synergistic role against NAFLD-induced lipid metabolism disorder. ![]()
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Affiliation(s)
- Jian Li
- Department of Blood Transfusion, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Jing Qi
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Yishu Tang
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Huaizheng Liu
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Kefu Zhou
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Zheren Dai
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Lehong Yuan
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Chuanzheng Sun
- Department of Emergency, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China.
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Hypertriglyceridemia and Other Plasma Lipid Profile Abnormalities among People Living with Diabetes Mellitus in Ethiopia: A Systematic Review and Meta-Analysis. BIOMED RESEARCH INTERNATIONAL 2021; 2021:7389076. [PMID: 34056001 PMCID: PMC8131138 DOI: 10.1155/2021/7389076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 03/11/2021] [Accepted: 04/30/2021] [Indexed: 11/17/2022]
Abstract
Background Dyslipidemia is one of the leading causes of cardiovascular complications in diabetes mellitus (DM) patients. Though it is a major public health problem in Ethiopia, there is no a nation-wide study to determine dyslipidemia among DM patients yet. Therefore, this systematic review and meta-analysis intended to estimate the prevalence of hypertriglyceridemia and other plasma lipid abnormalities among people living with DM in Ethiopia. Methods We systematically searched PubMed, Google Scholar, African Journals Online, Hinari, and direct Google. Studies conducted until May 9, 2020, that reports the prevalence of dyslipidemia among people living with DM were included. The DerSimonian and Laird random-effects model was used to determine the pooled prevalence of lipid profile abnormalities. Heterogeneity was checked using the I 2 statistic, whereas publication bias was tested by funnel plot and Egger's test. Besides, subgroup and sensitivity analyses were performed. Results We used 18 primary studies, including 4961 participants living with DM, which met the eligibility criteria for the meta-analysis of hypertriglyceridemia. The estimate of hypertriglyceridemia (≥150 mg/dl) was 48.15% (95% CI: 38.15-58.15, I 2 = 98.4%) after performing the main meta-analysis using the random-effects model. The subgroup analysis showed a higher pooled estimate of hypertriglyceridemia among T2DM (57.80% (95% CI: 50.50-65.10), I 2 = 92.5%), studies that used probability sampling technique (59.09% (95% CI: 43.58-74.59), I 2 = 98.6%, p < 0.001), and studies from primary data sources (51.43% (95% CI: 40.72-62.13), I 2 = 98.0%, p < 0.001). Moreover, the estimated pooled prevalence of the total plasma cholesterol (TC ≥ 200 mg/dl) was 34.08% (95% CI: 28.41-39.75, I 2 = 92.4%), LDL - C ≥ 100 mg/dl was 41.13% (95% CI: 27.15-55.11, I2 = 98.8%), and HDL ≤ 40 mg/dl for men and ≤ 50 mg/dl for women was 44.36% (95% CI: 31.82-56.90, I 2 = 98.8%). Conclusions The pooled prevalence of hypertriglyceridemia and other lipid abnormalities among DM patients was relatively high in Ethiopia. It strongly suggests the need to give maximal attention to the adherence of DM management to reduce the circulatory lipid profile abnormalities and subsequent complications. Prospero Registration. CRD42020182291.
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