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Seong H, Song JW, Lee KH, Jang G, Shin DM, Shon WJ. Taste receptor type 1 member 3 regulates Western diet-induced male infertility. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1869:159433. [PMID: 38007088 DOI: 10.1016/j.bbalip.2023.159433] [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: 06/20/2023] [Revised: 11/05/2023] [Accepted: 11/20/2023] [Indexed: 11/27/2023]
Abstract
Western diet (WD), characterized by a high intake of fats and sugary drinks, is a risk factor for male reproductive impairment. However, the molecular mechanisms underlying this remain unclear. Taste receptor type 1 member 3 (TAS1R3), activated by ligands of WD, is highly expressed in extra-oral tissues, particularly in the testes. Here, we investigated to determine the effects of WD intake on male reproduction and whether TAS1R3 mediates WD-induced impairment in male reproduction. Male C57BL/6 J wild-type (WT) and Tas1r3 knockout (KO) mice were fed either a normal diet and plain water (ND) or a 60 % high-fat-diet and 30 % (w/v) sucrose water (WD) for 18 weeks (n = 7-9/group). Long-term WD consumption significantly impaired sperm count, motility and testicular morphology in WT mice with marked Tas1r3 overexpression, whereas Tas1r3 KO mice were protected from WD-induced reproductive impairment. Testicular transcriptome analysis revealed downregulated AMP-activated protein kinase (AMPK) signaling and significantly elevated AMPK-targeted nuclear receptor 4A1 (Nr4a1) expression in WD-fed Tas1r3 KO mice. In vitro studies further validated that Tas1r3 knockdown in Leydig cells prevented the suppression of Nr4a1 and downstream steroidogenic genes (Star, Cyp11a1, Cyp17a1, and Hsd3b1) caused by high glucose, fructose, and palmitic acid levels, and maintained the levels of testosterone. Additionally, we analyzed the public human dataset to assess the clinical implications of our findings and confirmed a significant association between TAS1R3 and male-infertility-related diseases. Our findings suggest that TAS1R3 regulates WD-induced male reproductive impairment via the AMPK/NR4A1 signaling and can be a novel therapeutic target for male infertility.
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Affiliation(s)
- Hobin Seong
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
| | - Jae Won Song
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
| | - Keon-Hee Lee
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
| | - Goo Jang
- Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea; Comparative Medicine Disease Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Mi Shin
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea.
| | - Woo-Jeong Shon
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea.
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2
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Yang Q, Ma Q, Xu J, Liu Z, Mao X, Zhou Y, Cai Y, Da Q, Hong M, Weintraub NL, Fulton DJ, Belin de Chantemèle EJ, Huo Y. Endothelial AMPKα1/PRKAA1 exacerbates inflammation in HFD-fed mice. Br J Pharmacol 2021; 179:1661-1678. [PMID: 34796475 PMCID: PMC9112062 DOI: 10.1111/bph.15742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND AND PURPOSE Excess nutrient-induced endothelial cell inflammation is a hallmark in high fat diet (HFD)-induced metabolic syndrome. Pharmacological activation of protein kinase AMP-activated alpha 1(PRKAA1)/5'-Adenosine monophosphate-activated protein kinase alpha1 (AMPKα1) shows its beneficial effects in many studies of cardiometabolic disorders. However, AMPKα1, as a major cellular sensor of energy and nutrients in endothelial cells, has not been studied for its physiological role in excess nutrient-induced endothelial cell (EC) inflammation. EXPERIMENTAL APPROACH Wild-type and EC-specific Prkaa1 knockout mice were fed with an HFD. Body weight, fat mass composition, glucose and lipid levels were monitored regularly. Insulin sensitivity was analyzed systemically and in major metabolic organs/tissues. Inflammation status in metabolic organs/tissues were examined with quantitative RT-PCR and flow cytometry. Additionally, metabolic status, inflammation severity and signaling in cultured ECs were assayed with multiple approaches at the molecular level. KEY RESULTS EC Prkaa1 deficiency unexpectedly alleviated HFD-induced metabolic syndromes including decreased body weight and fat mass, enhanced glucose clearance and insulin sensitivity, and relieved adipose inflammation and hepatic steatosis. Mechanistically, PRKAA1 knockdown in cultured ECs reduced endothelial glycolysis and fatty acid oxidation, decreased the levels of acetyl-coA, and suppressed transcription of inflammatory molecules mediated by ATP citrate lyase (ACLY) and histone acetyltransferase p300. CONCLUSIONS AND IMPLICATIONS This unexpected pro-inflammatory effect of endothelial AMPKα1/PRKAA1 in metabolic context provides additional insight in AMPKα1/PRKAA1 activities, warranting that in-depth study and thoughtful consideration should be applied when AMPKα1/PRKAA1 is used as a therapeutic target in the treatment of metabolic syndrome.
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Affiliation(s)
- Qiuhua Yang
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Qian Ma
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Jiean Xu
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Zhiping Liu
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, China
| | - Xiaoxiao Mao
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Yaqi Zhou
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Yongfeng Cai
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Qingen Da
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Mei Hong
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen, China
| | - Neal L Weintraub
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - David J Fulton
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Eric J Belin de Chantemèle
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Yuqing Huo
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
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3
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Pereira CMC, Júnior GJD, Lima JVDN, Alves Lemos SI, da Rocha Rodrigues L, Dos Santos Ferreira J, Araújo ASML, de Oliveira JC, Monteiro CE, Franco ÁX, Pereira Alves EH, Oliveira Silva FG, de Carvalho Filgueiras M, Soares PMG, Pereira Vasconcelos DF, de Oliveira JS, de Brito TV, Barbosa ALR. Phosphatidylinositol 3-kinase gamma participates in nimesulide-induced hepatic damage. J Pharm Pharmacol 2021; 73:496-504. [PMID: 33793830 DOI: 10.1093/jpp/rgaa049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 12/07/2020] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To evaluate the participation of the phosphatidylinositol 3-kinase pathway in the liver damage caused by nimesulide. METHODS Liver damage been induced by nimesulide. Mice were treated with either 2% dimethyl sulfoxide or AS605240, a phosphatidylinositol 3-kinase gamma pathway antagonist. Blood samples were collected for function assays of liver. The liver was removed for analysis of liver weight/animal weight ratio, histopathological parameters, oxidative and nitrous stress, cytokine levels, and the immunostaining for cyclooxygenase 2 and nuclear factor kappa B. KEY FINDINGS Liver injured by nimesulide and treated with phosphatidylinositol 3-kinase gamma inhibitor significantly reversed (P < 0.05) the damage; it decreased the liver weight/animal weight ratio, histopathological scores, and neutrophil infiltration, consequently reducing oxidative stress. In addition, we show that phosphatidylinositol 3-kinase gamma is associated with hepatic damage induced by nimesulide, because it altered liver function and increased the protein immunostaining of cyclooxygenase 2 and nuclear factor kappa B in the liver tissue of nimesulide-treated animals. CONCLUSIONS The findings from the present study allows us to infer that nimesulide causes liver damage through the phosphatidylinositol 3-kinase gamma pathway.
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Affiliation(s)
- Cynthia Maria C Pereira
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Genilson José Dias Júnior
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - José Victor do N Lima
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Sarah Izabelly Alves Lemos
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Lauanda da Rocha Rodrigues
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Jayro Dos Santos Ferreira
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Anna Sofia Miranda Loiola Araújo
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Joveline Costa de Oliveira
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Carlos Eduardo Monteiro
- Laboratory of Physiopharmacology Study of Gastrointestinal Tract (LEFFAG), Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Álvaro Xavier Franco
- Laboratory of Physiopharmacology Study of Gastrointestinal Tract (LEFFAG), Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Even Herlany Pereira Alves
- Laboratory of Analysis and Histological Processing (LAPHIS), Department of Biomedicine, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Francisca Géssica Oliveira Silva
- Laboratory of Physiopharmacology Study of Gastrointestinal Tract (LEFFAG), Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marcelo de Carvalho Filgueiras
- Laboratory of Muscle Morphology and Physiology (LAMFIM), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Pedro M G Soares
- Laboratory of Physiopharmacology Study of Gastrointestinal Tract (LEFFAG), Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Daniel Fernando Pereira Vasconcelos
- Laboratory of Analysis and Histological Processing (LAPHIS), Department of Biomedicine, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Jefferson Soares de Oliveira
- Biochemistry Laboratory of Laticifers Plants (LABPL), Department of Biomedicine, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - Tarcisio Vieira de Brito
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
| | - André Luiz Reis Barbosa
- Laboratory of Experimental Physiopharmacology (LAFFEX), Department of Physioterapy, Federal University of the Parnaíba Delta, Parnaíba, Piauí, Brazil
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Chen H, Vanhoutte PM, Leung SWS. Vascular adenosine monophosphate-activated protein kinase: Enhancer, brake or both? Basic Clin Pharmacol Toxicol 2019; 127:81-91. [PMID: 31671245 DOI: 10.1111/bcpt.13357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/24/2019] [Indexed: 12/25/2022]
Abstract
Adenosine monophosphate-activated protein kinase (AMPK), expressed/present ubiquitously in the body, contributes to metabolic regulation. In the vasculature, activation of AMPK is associated with several beneficial biological effects including enhancement of vasodilatation, reduction of oxidative stress and inhibition of inflammatory reactions. The vascular protective effects of certain anti-diabetic (metformin and sitagliptin) or lipid-lowering (simvastatin and fenofibrate) therapeutic agents, of active components of Chinese medicinal herbs (resveratrol and berberine) and of pharmacological agents (AICAR, A769662 and PT1) have been attributed to the activation of AMPK (in endothelial cells, vascular smooth muscle cells and/or perivascular adipocytes), independently of changes in the metabolic profile (eg glucose tolerance and/or plasma lipoprotein levels), leading to improved endothelium-derived nitric oxide-mediated vasodilatation and attenuated endothelium-derived cyclooxygenase-dependent vasoconstriction. By contrast, endothelial AMPK activation with pharmacological agents or by genetic modification is associated with reduced endothelium-dependent relaxations in small blood vessels and elevated systolic blood pressure. Indeed, AMPK activators inhibit endothelium-dependent hyperpolarization (EDH)-type relaxations in superior mesenteric arteries, partly by inhibiting endothelial calcium-activated potassium channel signalling. Therefore, AMPK activation is not necessarily beneficial in terms of endothelial function. The contribution of endothelial AMPK in the regulation of vascular tone, in particular in the microvasculature where EDH plays a more important role, remains to be characterized.
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Affiliation(s)
- Hui Chen
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Paul Michel Vanhoutte
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China.,Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Susan Wai Sum Leung
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
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5
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Chen YY, Lin Y, Han PY, Jiang S, Che L, He CY, Lin YC, Lin ZN. HBx combined with AFB1 triggers hepatic steatosis via COX-2-mediated necrosome formation and mitochondrial dynamics disorder. J Cell Mol Med 2019; 23:5920-5933. [PMID: 31282064 PMCID: PMC6714226 DOI: 10.1111/jcmm.14388] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/04/2019] [Accepted: 04/18/2019] [Indexed: 12/12/2022] Open
Abstract
Hepatitis B virus (HBV) infection and aflatoxin B1 (AFB1) exposure have been recognized as independent risk factors for the occurrence and exacerbation of hepatic steatosis but their combined impacts and the potential mechanisms remain to be further elucidated. Here, we showed that exposure to AFB1 impaired mitochondrial dynamics and increased intracellular lipid droplets (LDs) in the liver of HBV-transgenic mice in vivo and the hepatitis B virus X protein (HBx)-expressing human hepatocytes both ex vivo and in vitro. HBx combined with AFB1 exposure also up-regulated receptor interaction protein 1 (RIP1), receptor interaction protein 3 (RIP3) and activated mixed lineage kinase domain like protein (MLKL), providing evidence of necrosome formation in the hepatocytes. The shift of the mitochondrial dynamics towards imbalance of fission and fusion was rescued when MLKL was inhibited in the HBx and AFB1 co-treated hepatocytes. Most importantly, based on siRNA or CRISPR/Cas9 system, we found that the combination of HBx and AFB1 exposure increased cyclooxygenase-2 (COX-2) to mediate up-regulation of RIP3 and dynamin-related protein 1 (Drp1), which in turn promoted location of RIP3-MLKL necrosome on mitochondria, subsequently exacerbated steatosis in hepatocytes. Taken together, these findings advance the understanding of mechanism associated with HBx and AFB1-induced hepatic necrosome formation, mitochondrial dysfunction and steatosis and make COX-2 a good candidate for treatment.
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Affiliation(s)
- Yuan-Yuan Chen
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Yi Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Pei-Yu Han
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China.,Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Shan Jiang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Lin Che
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Cheng-Yong He
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Yu-Chun Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
| | - Zhong-Ning Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China
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6
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Ara T, Nakatani S, Kobata K, Sogawa N, Sogawa C. The Biological Efficacy of Natural Products against Acute and Chronic Inflammatory Diseases in the Oral Region. MEDICINES 2018; 5:medicines5040122. [PMID: 30428613 PMCID: PMC6313758 DOI: 10.3390/medicines5040122] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 01/31/2023]
Abstract
The oral inflammatory diseases are divided into two types: acute and chronic inflammatory diseases. In this review, we summarize the biological efficacy of herbal medicine, natural products, and their active ingredients against acute and chronic inflammatory diseases in the oral region, especially stomatitis and periodontitis. We review the effects of herbal medicines and a biscoclaurin alkaloid preparation, cepharamthin, as a therapy against stomatitis, an acute inflammatory disease. We also summarize the effects of herbal medicines and natural products against periodontitis, a chronic inflammatory disease, and one of its clinical conditions, alveolar bone resorption. Recent studies show that several herbal medicines such as kakkonto and ninjinto reduce LPS-induced PGE2 production by human gingival fibroblasts. Among herbs constituting these herbal medicines, shokyo (Zingiberis Rhizoma) and kankyo (Zingiberis Processum Rhizoma) strongly reduce PGE2 production. Moreover, anti-osteoclast activity has been observed in some natural products with anti-inflammatory effects used against rheumatoid arthritis such as carotenoids, flavonoids, limonoids, and polyphenols. These herbal medicines and natural products could be useful for treating oral inflammatory diseases.
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Affiliation(s)
- Toshiaki Ara
- Department of Dental Pharmacology, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri 399-0781, Japan.
| | - Sachie Nakatani
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Kenji Kobata
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Norio Sogawa
- Department of Dental Pharmacology, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri 399-0781, Japan.
| | - Chiharu Sogawa
- Department of Dental Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8525, Japan.
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Glaser K, Dickie P, Neilson D, Osborn A, Dickie BH. Linkage of Metabolic Defects to Activated PIK3CA Alleles in Endothelial Cells Derived from Lymphatic Malformation. Lymphat Res Biol 2018; 16:43-55. [PMID: 29346025 DOI: 10.1089/lrb.2017.0033] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Lymphatic endothelial cells (LECs) derived from lymphatic malformations (LMs) bear activated PIK3CA alleles yet display an inflammatory gene expression profile. A basis for the inflammatory phenotype was sought by screening for coexisting somatic mutations. METHODS AND RESULTS Fourteen independent LEC populations bearing activated PIK3CA alleles were isolated from LM. These were characterized by the expression of growth and inflammatory genes (VEGFC, IL-6, COX-2, IL-8, HO-1, E-SEL) by qRT-PCR. Most commonly upregulated gene products were VEGFC, COX2, HO-1, and ANGPTL4. The specific inhibition of PI3K reduced VEGFC expression without resolving inflammation. Whole exome sequencing of six LM-LEC populations identified five novel somatically acquired alleles coexisting with activated PIK3CA alleles. Two affected genes regulate lipid droplet metabolism (FITM2 and ATG2A), two are gene regulators (MTA1 and TAF1L), and the fifth is an isoform of ANK3 (an endosomal/lysosomal protein). Inhibition of AMPK implicated its involvement in regulating COX-2 and HO-1 overexpression. ANGPTL4 expression was independent of AMPK and PI3K activity and reflected lipid stress demonstrated in normal LECs. AMPK activation with AICAR had a selective growth-limiting effect in a subset of LM-LEC isolates. CONCLUSIONS Inflammatory stress displayed by LM-LECs is consistent with errors in lipid metabolism that may be linked to acquired mutations. The acquisition of PIK3CA alleles may be a permissive event that antagonizes inflammation and metabolic defect.
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Affiliation(s)
- Kathryn Glaser
- 1 Department of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital and Medical Center , Cincinnati, Ohio
| | - Peter Dickie
- 1 Department of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital and Medical Center , Cincinnati, Ohio
| | - Derek Neilson
- 2 Division of Human Genetics, Cincinnati Children's Hospital and Medical Center , Cincinnati, Ohio
| | - Alexander Osborn
- 1 Department of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital and Medical Center , Cincinnati, Ohio
| | - Belinda Hsi Dickie
- 1 Department of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital and Medical Center , Cincinnati, Ohio
- 3 Department of Surgery, Harvard Medical School, Boston Children's Hospital , Boston, Massachusetts
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de Oliveira Sá G, dos Santos Neves V, de Oliveira Fraga SR, Souza-Mello V, Barbosa-da-Silva S. High-intensity interval training has beneficial effects on cardiac remodeling through local renin-angiotensin system modulation in mice fed high-fat or high-fructose diets. Life Sci 2017; 189:8-17. [DOI: 10.1016/j.lfs.2017.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 08/30/2017] [Accepted: 09/07/2017] [Indexed: 12/14/2022]
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9
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Caffeoylquinic Acid-Rich Extract of Aster glehni F. Schmidt Ameliorates Nonalcoholic Fatty Liver through the Regulation of PPAR δ and Adiponectin in ApoE KO Mice. PPAR Res 2017; 2017:3912567. [PMID: 29201040 PMCID: PMC5672637 DOI: 10.1155/2017/3912567] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/04/2017] [Accepted: 09/10/2017] [Indexed: 12/13/2022] Open
Abstract
Aster glehni is well known for its therapeutic properties. This study was performed to investigate the effects of A. glehni on nonalcoholic fatty liver disease (NAFLD) in atherosclerotic condition, by determining the levels of biomarkers related to lipid metabolism and inflammation in serum, liver, and adipose tissue. Body and abdominal adipose tissue weights and serum triglyceride level decreased in all groups treated with A. glehni. Serum adiponectin concentration and protein levels of peroxisome proliferator-activated receptor δ, 5′ adenosine monophosphate-activated protein kinase, acetyl-CoA carboxylase, superoxide dismutase, and PPARγ coactivator 1-alpha in liver tissues increased in the groups treated with A. glehni. Conversely, protein levels of ATP citrate lyase, fatty acid synthase, tumor necrosis factor α, and 3-hydroxy-3-methylglutaryl-CoA reductase and the concentrations of interleukin 6 and reactive oxygen species decreased upon A. glehni. Triglyceride concentration in the liver was lower in mice treated with A. glehni than in control mice. Lipid accumulation in HepG2 and 3T3-L1 cells decreased upon A. glehni treatment; this effect was suppressed in the presence of the PPARδ antagonist, GSK0660. Our findings suggest that A. glehni extracts may ameliorate NAFLD through regulation of PPARδ, adiponectin, and the related subgenes.
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Fernandes CR, Kannen V, Mata KM, Frajacomo FT, Jordão Junior AA, Gasparotto B, Sakita JY, Elias Junior J, Leonardi DS, Mauad FM, Ramos SG, Uyemura SA, Garcia SB. High-Fat and Fat-Enriched Diets Impair the Benefits of Moderate Physical Training in the Aorta and the Heart in Rats. Front Nutr 2017; 4:21. [PMID: 28573134 PMCID: PMC5435813 DOI: 10.3389/fnut.2017.00021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/30/2017] [Indexed: 01/05/2023] Open
Abstract
AIM Millions of people die each year due to cardiovascular disease (CVD). A Western lifestyle not only fuses a significant intake of fat with physical inactivity and obesity but also promotes CVD. Recent evidence suggests that dietary fat intake impairs the benefits of physical training. We investigated whether aerobic training could reverse the adverse effects of a high-fat diet (HFD) on the aorta. Then, we explored whether this type of exercise could reverse the damage to the heart that is imposed by fat-enriched diet (FED). METHODS Rats were randomly assigned to two experiments, which lasted 8 weeks each. First, rats swam for 60 min and were fed either a regular diet [standard diet (STD)] or an HFD. After aortic samples had been collected, the rats underwent a histopathological analysis for different biomarkers. Another experiment subjected rats that were fed either an STD or an FED to swimming for 20 or 90 min. RESULTS The first experiment revealed that rats that were subjected to an HFD-endured increased oxidative damage in the aorta that exercises could not counteract. Together with increased cyclooxygenase 2 expression, an HFD in combination with physical training increased the number of macrophages. A reduction in collagen fibers with an increased number of positive α-actin cells and expression of matrix metalloproteinase-2 occurred concomitantly. Upon analyzing the second experiment, we found that physically training rats that were given an FED for 90 min/day decreased the cardiac adipose tissue density, although it did not protect the heart from fat-induced oxidative damage. Even though the physical training lowered cholesterol levels that were promoted by the FED, the levels were still higher than those in the animals that were given an STD. Feeding rats an FED impaired the swimming protocol's effects on lowering triglyceride concentration. Additionally, exercise was unable to reverse the fat-induced deregulation in hepatic antioxidant and lipid peroxidation activities. CONCLUSION Our findings reveal that an increased intake of fat undermines the potential benefits of physical exercise on the heart and the aorta.
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Affiliation(s)
| | - Vinicius Kannen
- Department of Toxicology, Bromatology, and Clinical Analysis, University of Sao Paulo, Ribeirao Preto, Brazil
| | | | | | | | - Bianca Gasparotto
- Department of Toxicology, Bromatology, and Clinical Analysis, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Juliana Yumi Sakita
- Department of Toxicology, Bromatology, and Clinical Analysis, University of Sao Paulo, Ribeirao Preto, Brazil
| | | | | | | | | | - Sergio Akira Uyemura
- Department of Toxicology, Bromatology, and Clinical Analysis, University of Sao Paulo, Ribeirao Preto, Brazil
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Choi YJ, Lee KY, Jung SH, Kim HS, Shim G, Kim MG, Oh YK, Oh SH, Jun DW, Lee BH. Activation of AMPK by berberine induces hepatic lipid accumulation by upregulation of fatty acid translocase CD36 in mice. Toxicol Appl Pharmacol 2017; 316:74-82. [DOI: 10.1016/j.taap.2016.12.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/23/2016] [Accepted: 12/23/2016] [Indexed: 01/05/2023]
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Role of AMP-activated protein kinase α1 in angiotensin-II-induced renal Tgfß-activated kinase 1 activation. Biochem Biophys Res Commun 2016; 476:267-272. [DOI: 10.1016/j.bbrc.2016.05.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 05/22/2016] [Indexed: 01/12/2023]
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Alpha-naphthylisothiocyanate impairs bile acid homeostasis through AMPK-FXR pathways in rat primary hepatocytes. Toxicology 2016; 370:106-115. [DOI: 10.1016/j.tox.2016.09.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 09/29/2016] [Accepted: 09/30/2016] [Indexed: 12/16/2022]
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Salminen A, Kaarniranta K, Kauppinen A. AMPK and HIF signaling pathways regulate both longevity and cancer growth: the good news and the bad news about survival mechanisms. Biogerontology 2016; 17:655-80. [PMID: 27259535 DOI: 10.1007/s10522-016-9655-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 05/31/2016] [Indexed: 02/08/2023]
Abstract
The AMP-activated protein kinase (AMPK) and hypoxia-inducible factor (HIF) signaling pathways are evolutionarily-conserved survival mechanisms responding to two fundamental stresses, energy deficiency and/or oxygen deprivation. The AMPK and HIF pathways regulate the function of a survival network with several transcription factors, e.g. FOXO, NF-κB, NRF2, and p53, as well as with protein kinases and other factors, such as mTOR, ULK1, HDAC5, and SIRT1. Given that AMPK and HIF activation can enhance not only healthspan and lifespan but also cancer growth in a context-dependent manner; it seems that cancer cells can hijack certain survival factors to maintain their growth in harsh conditions. AMPK activation improves energy metabolism, stimulates autophagy, and inhibits inflammation, whereas HIF-1α increases angiogenesis and helps cells to adapt to severe conditions. First we will review how AMPK and HIF signaling mechanisms control the function of an integrated survival network which is able not only to improve the regulation of longevity but also support the progression of tumorigenesis. We will also describe distinct crossroads between the regulation of longevity and cancer, e.g. specific regulation through the AMPKα and HIF-α isoforms, the Warburg effect, mitochondrial dynamics, and cellular senescence.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.,Department of Ophthalmology, Kuopio University Hospital, P.O. Box 100, FI-70029, KYS, Finland
| | - Anu Kauppinen
- Faculty of Health Sciences, School of Pharmacy, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland
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Impact of AMP-Activated Protein Kinase α1 Deficiency on Tissue Injury following Unilateral Ureteral Obstruction. PLoS One 2015; 10:e0135235. [PMID: 26285014 PMCID: PMC4540418 DOI: 10.1371/journal.pone.0135235] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 07/20/2015] [Indexed: 12/22/2022] Open
Abstract
Background AMP-activated protein kinase (Ampk) is a sensor of the cellular energy status and a powerful regulator of metabolism. Activation of Ampk was previously shown to participate in monocyte-to-fibroblast transition and matrix protein production in renal tissue. Thus, the present study explored whether the catalytic Ampkα1 isoform participates in the regulation of the renal fibrotic response following unilateral ureteral obstruction (UUO). Methods UUO was induced in gene-targeted mice lacking functional Ampkα1 (Ampkα1-/-) and in corresponding wild-type mice (Ampkα1+/+). In the obstructed kidney and, for comparison, in the non-obstructed control kidney, quantitative RT-PCR, Western blotting and immunostaining were employed to determine transcript levels and protein abundance, respectively. Results In Ampkα1+/+ mice, UUO significantly up-regulated the protein abundance of the Ampkα1 isoform, but significantly down-regulated the Ampkα2 isoform in renal tissue. Phosphorylated Ampkα protein levels were significantly increased in obstructed kidney tissue of Ampkα1+/+ mice but not of Ampkα1-/- mice. Renal expression of α-smooth muscle actin was increased following UUO, an effect again less pronounced in Ampkα1-/- mice than in Ampkα1+/+ mice. Histological analysis did not reveal a profound effect of Ampkα1 deficiency on collagen 1 protein deposition. UUO significantly increased phosphorylated and total Tgf-ß-activated kinase 1 (Tak1) protein, as well as transcript levels of Tak1-downstream targets c-Fos, Il6, Pai1 and Snai1 in Ampkα1+/+ mice, effects again significantly ameliorated in Ampkα1-/- mice. Moreover, Ampkα1 deficiency inhibited the UUO-induced mRNA expression of Cd206, a marker of M2 macrophages and of Cxcl16, a pro-fibrotic chemokine associated with myeloid fibroblast formation. The effects of Ampkα1 deficiency during UUO were, however, paralleled by increased tubular injury and apoptosis. Conclusions Renal obstruction induces an isoform shift from Ampkα2 towards Ampkα1, which contributes to the signaling involved in cell survival and fibrosis.
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Tang SQ, Yin S, Liu S, Le KJ, Yang RL, Liu JH, Wang XL, Zheng ZX, Zheng L, Lin Q, Lu Y. N-stearoyltyrosine dipotassium ameliorates high-fat diet-induced obesity in C57BL/6 mice. Eur J Pharm Sci 2015; 74:18-26. [DOI: 10.1016/j.ejps.2015.03.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 03/14/2015] [Accepted: 03/29/2015] [Indexed: 01/13/2023]
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