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Cizkova D, Zurmanova JM, Gerykova L, Kouvelas A, Heles M, Elsnicova B, Galatik F, Silhavy J, Pravenec M, Mokry J. Nestin expression in intact and hypertrophic myocardium of spontaneously hypertensive rats during aging. J Muscle Res Cell Motil 2024; 45:41-51. [PMID: 36690826 PMCID: PMC11096222 DOI: 10.1007/s10974-023-09641-9] [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: 07/31/2022] [Accepted: 01/15/2023] [Indexed: 01/25/2023]
Abstract
Nestin is a unique intermediate filament expressed for a short period in the developing heart. It was also documented in several cell types of the adult myocardium under pathological conditions such as myocardial infarction or fibrosis. However, circumstances of nestin re-occurrence in the diseased or aging heart have not been elucidated yet. In this work we immunohistochemically detected nestin to determine its expression and distribution pattern in the left ventricular myocardium of normotensive Wistar Kyoto (WKY) rats and in the hypertrophic ones of spontaneously hypertensive (SHR) rats, both at the age of 1 and 1.5 year. No nestin+ cells were identified in the intact myocardium of 1-year-old WKY rats, whereas in the aged 1.5-year-old WKY rats nestin+ endothelial cells in some blood vessels were discovered. In the hypertrophic myocardium of all SHR rats, nestin was rarely detected in desmin+ vimentin- cardiomyocytes and in some vimentin+ interstitial cells often accumulated in clusters, varying in intensity of desmin immunoreactivity. Moreover, nestin was infrequently expressed in the endothelial cells of some myocardial blood vessels in 1-year-old SHR rats, but not in 1.5-year-old ones. Quantitative image analysis of nestin expression in the myocardium confirmed significant increase in 1.5-year-old WKY rats and in SHR rats of both ages compared to the intact 1-year-old WKY rats. This study firstly documents nestin re-expression indicating cytoskeletal remodelling in different cell types of the aging intact and chronically pressure over-loaded hypertrophied myocardium. Our findings confirm nestin involvement in complex changes during myocardial hypertrophy and progressive aging.
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Affiliation(s)
- Dana Cizkova
- Department of Histology and Embryology, Faculty of Medicine in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Jitka M Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic.
| | - Lucie Gerykova
- Department of Histology and Embryology, Faculty of Medicine in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Alexandros Kouvelas
- Department of Histology and Embryology, Faculty of Medicine in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Mario Heles
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Barbara Elsnicova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Frantisek Galatik
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Silhavy
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jaroslav Mokry
- Department of Histology and Embryology, Faculty of Medicine in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
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2
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Moss A, Kuttippurathu L, Srivastava A, Schwaber JS, Vadigepalli R. Dynamic dysregulation of transcriptomic networks in brainstem autonomic nuclei during hypertension development in the female spontaneously hypertensive rat. Physiol Genomics 2024; 56:283-300. [PMID: 38145287 PMCID: PMC11283910 DOI: 10.1152/physiolgenomics.00073.2023] [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: 07/21/2023] [Revised: 12/17/2023] [Accepted: 12/19/2023] [Indexed: 12/26/2023] Open
Abstract
Neurogenic hypertension stems from an imbalance in autonomic function that shifts the central cardiovascular control circuits toward a state of dysfunction. Using the female spontaneously hypertensive rat and the normotensive Wistar-Kyoto rat model, we compared the transcriptomic changes in three autonomic nuclei in the brainstem, nucleus of the solitary tract (NTS), caudal ventrolateral medulla, and rostral ventrolateral medulla (RVLM) in a time series at 8, 10, 12, 16, and 24 wk of age, spanning the prehypertensive stage through extended chronic hypertension. RNA-sequencing data were analyzed using an unbiased, dynamic pattern-based approach that uncovered dominant and several subtle differential gene regulatory signatures. Our results showed a persistent dysregulation across all three autonomic nuclei regardless of the stage of hypertension development as well as a cascade of transient dysregulation beginning in the RVLM at the prehypertensive stage that shifts toward the NTS at the hypertension onset. Genes that were persistently dysregulated were heavily enriched for immunological processes such as antigen processing and presentation, the adaptive immune response, and the complement system. Genes with transient dysregulation were also largely region-specific and were annotated for processes that influence neuronal excitability such as synaptic vesicle release, neurotransmitter transport, and an array of neuropeptides and ion channels. Our results demonstrate that neurogenic hypertension is characterized by brainstem region-specific transcriptomic changes that are highly dynamic with significant gene regulatory changes occurring at the hypertension onset as a key time window for dysregulation of homeostatic processes across the autonomic control circuits.NEW & NOTEWORTHY Hypertension is a major disease and is the primary risk factor for cardiovascular complications and stroke. The gene expression changes in the central nervous system circuits driving hypertension are understudied. Here, we show that coordinated and region-specific gene expression changes occur in the brainstem autonomic circuits over time during the development of a high blood pressure phenotype in a rat model of human essential hypertension.
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Affiliation(s)
- Alison Moss
- Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - Lakshmi Kuttippurathu
- Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - Ankita Srivastava
- Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - James S Schwaber
- Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - Rajanikanth Vadigepalli
- Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
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3
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Allayee H, Farber CR, Seldin MM, Williams EG, James DE, Lusis AJ. Systems genetics approaches for understanding complex traits with relevance for human disease. eLife 2023; 12:e91004. [PMID: 37962168 PMCID: PMC10645424 DOI: 10.7554/elife.91004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/16/2023] [Indexed: 11/15/2023] Open
Abstract
Quantitative traits are often complex because of the contribution of many loci, with further complexity added by environmental factors. In medical research, systems genetics is a powerful approach for the study of complex traits, as it integrates intermediate phenotypes, such as RNA, protein, and metabolite levels, to understand molecular and physiological phenotypes linking discrete DNA sequence variation to complex clinical and physiological traits. The primary purpose of this review is to describe some of the resources and tools of systems genetics in humans and rodent models, so that researchers in many areas of biology and medicine can make use of the data.
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Affiliation(s)
- Hooman Allayee
- Departments of Population & Public Health Sciences, University of Southern CaliforniaLos AngelesUnited States
- Biochemistry & Molecular Medicine, Keck School of Medicine, University of Southern CaliforniaLos AngelesUnited States
| | - Charles R Farber
- Center for Public Health Genomics, University of Virginia School of MedicineCharlottesvilleUnited States
- Departments of Biochemistry & Molecular Genetics, University of Virginia School of MedicineCharlottesvilleUnited States
- Public Health Sciences, University of Virginia School of MedicineCharlottesvilleUnited States
| | - Marcus M Seldin
- Department of Biological Chemistry, University of California, IrvineIrvineUnited States
| | - Evan Graehl Williams
- Luxembourg Centre for Systems Biomedicine, University of LuxembourgLuxembourgLuxembourg
| | - David E James
- School of Life and Environmental Sciences, University of SydneyCamperdownAustralia
- Faculty of Medicine and Health, University of SydneyCamperdownAustralia
- Charles Perkins Centre, University of SydneyCamperdownAustralia
| | - Aldons J Lusis
- Departments of Human Genetics, University of California, Los AngelesLos AngelesUnited States
- Medicine, University of California, Los AngelesLos AngelesUnited States
- Microbiology, Immunology, & Molecular Genetics, David Geffen School of Medicine of UCLALos AngelesUnited States
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de Souza P, da Silva RDCV, Mariano LNB, Dick SL, Ventura GC, Cechinel-Filho V. Diuretic and Natriuretic Effects of Hesperidin, a Flavanone Glycoside, in Female and Male Hypertensive Rats. PLANTS (BASEL, SWITZERLAND) 2022; 12:plants12010025. [PMID: 36616153 PMCID: PMC9824741 DOI: 10.3390/plants12010025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/09/2022] [Accepted: 12/19/2022] [Indexed: 05/14/2023]
Abstract
Hesperidin (HSP) is a major flavanone glycoside in citrus fruits, including sweet oranges and lemons. It demonstrates numerous pharmacological activities, such as antihypertensive effects and cardiac and kidney tissue protection. However, its effect on modulating renal function has yet to be properly explored. Female and male Wistar spontaneously hypertensive rats (SHR) were used to test the effect of HSP on renal function. The rats were divided into different groups, treated orally, and placed in metabolic cages for urine collection for 8 h. HSP, at doses of 0.3-3 mg/kg, led to an increase in urine volume in both female and male SHR. This effect was associated with increased Na+ elimination (3 mg/kg) without causing any change in K+ excretion or pH and conductivity values. When given HSP in combination with hydrochlorothiazide (HCTZ) or amiloride (AMLR), urine volume and Na+ elimination were significantly increased compared to the group that received only HSP. In relation to K+ excretion, the depleting effect of HCTZ and the sparing of AMLR prevailed in both groups. Pre-treatment with a non-selective cholinergic receptor antagonist, atropine, partially prevented HSP-induced diuresis and natriuresis in male SHR, but this effect was not demonstrated with the non-selective inhibitor of the enzyme cyclooxygenase, indomethacin. This study shows the diuretic action of HSP in hypertensive rats, an activity probably associated with the cholinergic pathway. Although various biological actions have already been defined for HSP, this pioneering research reveals its potential as a diuretic medicine.
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Insulin Resistance Is Cheerfully Hitched with Hypertension. Life (Basel) 2022; 12:life12040564. [PMID: 35455055 PMCID: PMC9028820 DOI: 10.3390/life12040564] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 12/15/2022] Open
Abstract
Cardiovascular diseases and type 2 diabetes mellitus (T2DM) have risen steadily worldwide, particularly in low-income and developing countries. In the last hundred years, deaths caused by cardiovascular diseases increased rapidly to 35–40%, becoming the most common cause of mortality worldwide. Cardiovascular disease is the leading cause of morbidity and mortality in type 2 diabetes mellitus (T2DM), which is aggravated by hypertension. Hypertension and diabetes are closely interlinked since they have similar risk factors such as endothelial dysfunction, vascular inflammation, arterial remodeling, atherosclerosis, dyslipidemia, and obesity. Patients with high blood pressure often show insulin resistance and have a higher risk of developing diabetes than normotensive individuals. It has been observed that over the last 30 years, the prevalence of insulin resistance (IR) has increased significantly. Accordingly, hypertension and insulin resistance are strongly related to an increased risk of impaired glucose tolerance, diabetes, cardiovascular diseases (CVD), and endocrine disorders. Common mechanisms, for instance, upregulation of the renin–angiotensin–aldosterone system, oxidative stress, inflammation, and activation of the immune system, possibly have a role in the association between diabetes and hypertension. Altogether these abnormalities significantly increase the risk of developing type 2 diabetes.
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Genetic Complementation of ATP Synthase Deficiency Due to Dysfunction of TMEM70 Assembly Factor in Rat. Biomedicines 2022; 10:biomedicines10020276. [PMID: 35203486 PMCID: PMC8869460 DOI: 10.3390/biomedicines10020276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/05/2022] [Accepted: 01/18/2022] [Indexed: 11/17/2022] Open
Abstract
Mutations of the TMEM70 gene disrupt the biogenesis of the ATP synthase and represent the most frequent cause of autosomal recessive encephalo-cardio-myopathy with neonatal onset. Patient tissues show isolated defects in the ATP synthase, leading to the impaired mitochondrial synthesis of ATP and insufficient energy provision. In the current study, we tested the efficiency of gene complementation by using a transgenic rescue approach in spontaneously hypertensive rats with the targeted Tmem70 gene (SHR-Tmem70ko/ko), which leads to embryonic lethality. We generated SHR-Tmem70ko/ko knockout rats expressing the Tmem70 wild-type transgene (SHR-Tmem70ko/ko,tg/tg) under the control of the EF-1α universal promoter. Transgenic rescue resulted in viable animals that showed the variable expression of the Tmem70 transgene across the range of tissues and only minor differences in terms of the growth parameters. The TMEM70 protein was restored to 16–49% of the controls in the liver and heart, which was sufficient for the full biochemical complementation of ATP synthase biogenesis as well as for mitochondrial energetic function in the liver. In the heart, we observed partial biochemical complementation, especially in SHR-Tmem70ko/ko,tg/0 hemizygotes. As a result, this led to a minor impairment in left ventricle function. Overall, the transgenic rescue of Tmem70 in SHR-Tmem70ko/ko knockout rats resulted in the efficient complementation of ATP synthase deficiency and thus in the successful genetic treatment of an otherwise fatal mitochondrial disorder.
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7
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Dahale S, Ruiz-Orera J, Silhavy J, Hübner N, van Heesch S, Pravenec M, Atanur SS. Cap analysis of gene expression reveals alternative promoter usage in a rat model of hypertension. Life Sci Alliance 2022; 5:5/4/e202101234. [PMID: 34996843 PMCID: PMC8742872 DOI: 10.26508/lsa.202101234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/26/2021] [Accepted: 12/28/2021] [Indexed: 11/24/2022] Open
Abstract
The role of alternative promoter usage in tissue-specific gene expression has been well established; however, its role in complex diseases is poorly understood. We performed cap analysis of gene expression (CAGE) sequencing from the left ventricle of a rat model of hypertension, the spontaneously hypertensive rat (SHR), and a normotensive strain, Brown Norway to understand the role of alternative promoter usage in complex disease. We identified 26,560 CAGE-defined transcription start sites in the rat left ventricle, including 1,970 novel cardiac transcription start sites. We identified 28 genes with alternative promoter usage between SHR and Brown Norway, which could lead to protein isoforms differing at the amino terminus between two strains and 475 promoter switching events altering the length of the 5' UTR. We found that the shift in Insr promoter usage was significantly associated with insulin levels and blood pressure within a panel of HXB/BXH recombinant inbred rat strains, suggesting that hyperinsulinemia due to insulin resistance might lead to hypertension in SHR. Our study provides a preliminary evidence of alternative promoter usage in complex diseases.
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Affiliation(s)
- Sonal Dahale
- Department of Metabolism, Digestion, and Reproduction, Faculty of Medicine, Imperial College London, London, UK.,Department of Microbial Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Jorge Ruiz-Orera
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Jan Silhavy
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Norbert Hübner
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.,Charité -Universitätsmedizin, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Berlin, Germany
| | | | - Michal Pravenec
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Santosh S Atanur
- Department of Metabolism, Digestion, and Reproduction, Faculty of Medicine, Imperial College London, London, UK .,The National Institute for Health Research, Imperial Biomedical Research Centre, ITMAT Data Science Group, Imperial College London, London, UK
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Pravenec M, Šilhavý J, Mlejnek P, Šimáková M, Mráček T, Pecinová A, Tauchmannová K, Hütl M, Malínská H, Kazdová L, Neckář J, Kolář F, Žurmanová J, Novotný J, Houštěk J. Conplastic strains for identification of retrograde effects of mitochondrial dna variation on cardiometabolic traits in the spontaneously hypertensive rat. Physiol Res 2021; 70:S471-S484. [DOI: 10.33549/physiolres.934740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial retrograde signaling is a pathway of communication from mitochondria to the nucleus. Recently, natural mitochondrial genome (mtDNA) polymorphisms (haplogroups) received increasing attention in the pathophysiology of human common diseases. However, retrograde effects of mtDNA variants on such traits are difficult to study in humans. The conplastic strains represent key animal models to elucidate regulatory roles of mtDNA haplogroups on defined nuclear genome background. To analyze the relationship between mtDNA variants and cardiometabolic traits, we derived a set of rat conplastic strains (SHR-mtBN, SHR-mtF344 and SHR-mtLEW), harboring all major mtDNA haplotypes present in common inbred strains on the nuclear background of the spontaneously hypertensive rat (SHR). The BN, F344 and LEW mtDNA differ from the SHR in multiple amino acid substitutions in protein coding genes and also in variants of tRNA and rRNA genes. Different mtDNA haplotypes were found to predispose to various sets of cardiometabolic phenotypes which provided evidence for significant retrograde effects of mtDNA in the SHR. In the future, these animals could be used to decipher individual biochemical components involved in the retrograde signaling.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - J Houštěk
- Institute of Physiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic. ,
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Wu Q, Luo F, Wang XL, Lin Q, Liu GQ. Angiotensin I-converting enzyme inhibitory peptide: an emerging candidate for vascular dysfunction therapy. Crit Rev Biotechnol 2021; 42:736-755. [PMID: 34634988 DOI: 10.1080/07388551.2021.1948816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abnormal vasoconstriction, inflammation, and vascular remodeling can be promoted by angiotensin II (Ang II) in the renin-angiotensin system (RAS), leading to vascular dysfunction diseases such as hypertension and atherosclerosis. Researchers have recently focused on angiotensin I-converting enzyme inhibitory peptides (ACEIPs), that have desirable efficacy in vascular dysfunction therapy due to Ang II reduction by inhibiting ACE activity. Promising methods for the large-scale preparation of ACEIPs include selective enzymatic hydrolysis and microbial fermentation. Thus far, ACEIPs have been widely reported to be hydrolyzed from protein-rich sources, including animals, plants, and marine organisms, while many emerging microorganism-derived ACEIPs are theoretically biosynthesized through the nonribosomal peptide synthase (NRPS) pathway. Notably, vasodilatation, anti-inflammation, and vascular reconstruction reversal of ACEIPs are strongly correlated. However, the related molecular mechanisms underlying signal transduction regulation in vivo remain unclear. We provide a comprehensive update of the ACE-Ang II-G protein-coupled type 1 angiotensin receptor (AT1R) axis signaling and its functional significance for potential translation into therapeutic strategies, particularly targeting AT1R by ACEIPs, as well as specific related signaling pathways. Future studies are expected to verify the biosynthetic regulatory mechanism of ACEIPs via the NRPS pathway, the effect of gut microbiota metabolism on vascular dysfunction and rigorous studies of ACE-Ang II-AT1R signaling pathways mediated by ACEIPs in large animals and humans.
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Affiliation(s)
- Qiang Wu
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, Changsha, China.,College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
| | - Feijun Luo
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, Changsha, China.,College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Xiao-Ling Wang
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, Changsha, China
| | - Qinlu Lin
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, Changsha, China.,College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Gao-Qiang Liu
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry and Technology, Changsha, China
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Khan AA, Sundar P, Natarajan B, Gupta V, Arige V, Reddy SS, Barthwal MK, Mahapatra NR. An evolutionarily-conserved promoter allele governs HMG-CoA reductase expression in spontaneously hypertensive rat. J Mol Cell Cardiol 2021; 158:140-152. [PMID: 34081950 DOI: 10.1016/j.yjmcc.2021.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/27/2021] [Accepted: 05/25/2021] [Indexed: 11/18/2022]
Abstract
3-Hydroxy-3-methyl glutaryl-coenzyme A reductase (Hmgcr) encodes the rate-limiting enzyme in the cholesterol biosynthesis pathway. The regulation of Hmgcr in rat models of genetic hypertension (viz. Spontaneously Hypertensive Rat [SHR] and its normotensive control Wistar/Kyoto [WKY] strain) is unclear. Interestingly, Hmgcr transcript and protein levels are diminished in liver tissues of SHR as compared to WKY. This observation is consistent with the diminished plasma cholesterol level in SHR animals. However, the molecular basis of these apparently counter-intuitive findings remains completely unknown. Sequencing of the Hmgcr promoter in SHR and WKY strains reveals three variations: A-405G, C-62T and a 11 bp insertion (-398_-388insTGCGGTCCTCC) in SHR. Among these variations, A-405G occurs at an evolutionarily-conserved site among many mammals. Moreover, SHR-Hmgcr promoter displays lower activity than WKY-Hmgcr promoter in various cell lines. Transient transfections of Hmgcr-promoter mutants and in silico analysis suggest altered binding of Runx3 and Srebf1 across A-405G site. On the other hand, C-62T and -398_-388insTGCGGTCCTCC variations do not appear to contribute to the reduced Hmgcr promoter activity in SHR as compared to WKY. Indeed, chromatin immunoprecipitation assays confirm differential binding of Runx3 and Srebf1 to Hmgcr promoter leading to reduced expression of Hmgcr in SHR as compared to WKY under basal as well as cholesterol-modulated conditions. Taken together, this study provides, for the first time, molecular basis for diminished Hmgcr expression in SHR animals, which may account for the reduced circulating cholesterol level in this widely-studied model for cardiovascular diseases.
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Affiliation(s)
- Abrar A Khan
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Poovitha Sundar
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Bhargavi Natarajan
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Vinayak Gupta
- Bennett University, Plot No. 8-11, Techzone II, Greater Noida 201310, India
| | - Vikas Arige
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - S Santosh Reddy
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Manoj K Barthwal
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Nitish R Mahapatra
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India.
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Human Pluripotent Stem-Cell-Derived Models as a Missing Link in Drug Discovery and Development. Pharmaceuticals (Basel) 2021; 14:ph14060525. [PMID: 34070895 PMCID: PMC8230131 DOI: 10.3390/ph14060525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 12/11/2022] Open
Abstract
Human pluripotent stem cells (hPSCs), including human embryonic stem cells (hESCs) and human-induced pluripotent stem cells (hiPSCs), have the potential to accelerate the drug discovery and development process. In this review, by analyzing each stage of the drug discovery and development process, we identified the active role of hPSC-derived in vitro models in phenotypic screening, target-based screening, target validation, toxicology evaluation, precision medicine, clinical trial in a dish, and post-clinical studies. Patient-derived or genome-edited PSCs can generate valid in vitro models for dissecting disease mechanisms, discovering novel drug targets, screening drug candidates, and preclinically and post-clinically evaluating drug safety and efficacy. With the advances in modern biotechnologies and developmental biology, hPSC-derived in vitro models will hopefully improve the cost-effectiveness and the success rate of drug discovery and development.
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Takeuchi F, Liang YQ, Isono M, Tajima M, Cui ZH, Iizuka Y, Gotoda T, Nabika T, Kato N. Integrative genomic analysis of blood pressure and related phenotypes in rats. Dis Model Mech 2021; 14:dmm048090. [PMID: 34010951 PMCID: PMC8188887 DOI: 10.1242/dmm.048090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
Despite remarkable progress made in human genome-wide association studies, there remains a substantial gap between statistical evidence for genetic associations and functional comprehension of the underlying mechanisms governing these associations. As a means of bridging this gap, we performed genomic analysis of blood pressure (BP) and related phenotypes in spontaneously hypertensive rats (SHR) and their substrain, stroke-prone SHR (SHRSP), both of which are unique genetic models of severe hypertension and cardiovascular complications. By integrating whole-genome sequencing, transcriptome profiling, genome-wide linkage scans (maximum n=1415), fine congenic mapping (maximum n=8704), pharmacological intervention and comparative analysis with transcriptome-wide association study (TWAS) datasets, we searched causal genes and causal pathways for the tested traits. The overall results validated the polygenic architecture of elevated BP compared with a non-hypertensive control strain, Wistar Kyoto rats (WKY); e.g. inter-strain BP differences between SHRSP and WKY could be largely explained by an aggregate of BP changes in seven SHRSP-derived consomic strains. We identified 26 potential target genes, including rat homologs of human TWAS loci, for the tested traits. In this study, we re-discovered 18 genes that had previously been determined to contribute to hypertension or cardiovascular phenotypes. Notably, five of these genes belong to the kallikrein-kinin/renin-angiotensin systems (KKS/RAS), in which the most prominent differential expression between hypertensive and non-hypertensive alleles could be detected in rat Klk1 paralogs. In combination with a pharmacological intervention, we provide in vivo experimental evidence supporting the presence of key disease pathways, such as KKS/RAS, in a rat polygenic hypertension model.
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Affiliation(s)
- Fumihiko Takeuchi
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Yi-Qiang Liang
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Masato Isono
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Michiko Tajima
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Zong Hu Cui
- Department of Functional Pathology, Shimane University Faculty of Medicine, Izumo 693-0021, Japan
| | - Yoko Iizuka
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
| | - Takanari Gotoda
- Department of Metabolism and Biochemistry, Kyorin University Faculty of Medicine, Tokyo 181-8611, Japan
| | - Toru Nabika
- Department of Functional Pathology, Shimane University Faculty of Medicine, Izumo 693-0021, Japan
| | - Norihiro Kato
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
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13
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Mihola O, Landa V, Pratto F, Brick K, Kobets T, Kusari F, Gasic S, Smagulova F, Grey C, Flachs P, Gergelits V, Tresnak K, Silhavy J, Mlejnek P, Camerini-Otero RD, Pravenec M, Petukhova GV, Trachtulec Z. Rat PRDM9 shapes recombination landscapes, duration of meiosis, gametogenesis, and age of fertility. BMC Biol 2021; 19:86. [PMID: 33910563 PMCID: PMC8082845 DOI: 10.1186/s12915-021-01017-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 04/01/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Vertebrate meiotic recombination events are concentrated in regions (hotspots) that display open chromatin marks, such as trimethylation of lysines 4 and 36 of histone 3 (H3K4me3 and H3K36me3). Mouse and human PRDM9 proteins catalyze H3K4me3 and H3K36me3 and determine hotspot positions, whereas other vertebrates lacking PRDM9 recombine in regions with chromatin already opened for another function, such as gene promoters. While these other vertebrate species lacking PRDM9 remain fertile, inactivation of the mouse Prdm9 gene, which shifts the hotspots to the functional regions (including promoters), typically causes gross fertility reduction; and the reasons for these species differences are not clear. RESULTS We introduced Prdm9 deletions into the Rattus norvegicus genome and generated the first rat genome-wide maps of recombination-initiating double-strand break hotspots. Rat strains carrying the same wild-type Prdm9 allele shared 88% hotspots but strains with different Prdm9 alleles only 3%. After Prdm9 deletion, rat hotspots relocated to functional regions, about 40% to positions corresponding to Prdm9-independent mouse hotspots, including promoters. Despite the hotspot relocation and decreased fertility, Prdm9-deficient rats of the SHR/OlaIpcv strain produced healthy offspring. The percentage of normal pachytene spermatocytes in SHR-Prdm9 mutants was almost double than in the PWD male mouse oligospermic sterile mutants. We previously found a correlation between the crossover rate and sperm presence in mouse Prdm9 mutants. The crossover rate of SHR is more similar to sperm-carrying mutant mice, but it did not fully explain the fertility of the SHR mutants. Besides mild meiotic arrests at rat tubular stages IV (mid-pachytene) and XIV (metaphase), we also detected postmeiotic apoptosis of round spermatids. We found delayed meiosis and age-dependent fertility in both sexes of the SHR mutants. CONCLUSIONS We hypothesize that the relative increased fertility of rat versus mouse Prdm9 mutants could be ascribed to extended duration of meiotic prophase I. While rat PRDM9 shapes meiotic recombination landscapes, it is unnecessary for recombination. We suggest that PRDM9 has additional roles in spermatogenesis and speciation-spermatid development and reproductive age-that may help to explain male-specific hybrid sterility.
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Affiliation(s)
- Ondrej Mihola
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Vladimir Landa
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Florencia Pratto
- National Institute of Diabetes, Digestive, and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Kevin Brick
- National Institute of Diabetes, Digestive, and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Tatyana Kobets
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Fitore Kusari
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Srdjan Gasic
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Fatima Smagulova
- Department of Biochemistry and Molecular Biology, Uniformed Services University of Health Sciences, Bethesda, MD, 20814, USA
- Present address: Inserm U1085 IRSET, 35042, Rennes, France
| | - Corinne Grey
- Institut de Génétique Humaine, CNRS UMR 9002, 34396, Montpellier, France
| | - Petr Flachs
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
- Present address: Division BIOCEV, Laboratory of Epigenetics of the Cell Nucleus, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Vaclav Gergelits
- Laboratory of Mouse Molecular Genetics, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Karel Tresnak
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Jan Silhavy
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Petr Mlejnek
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - R Daniel Camerini-Otero
- National Institute of Diabetes, Digestive, and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Michal Pravenec
- Laboratory of Genetics of Model Diseases, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Galina V Petukhova
- Department of Biochemistry and Molecular Biology, Uniformed Services University of Health Sciences, Bethesda, MD, 20814, USA
| | - Zdenek Trachtulec
- Laboratory of Germ Cell Development, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220, Prague, Czech Republic.
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14
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Junková K, Mirchi LF, Chylíková B, Janků M, Šilhavý J, Hüttl M, Marková I, Miklánková D, Včelák J, Malínská H, Pravenec M, Šeda O, Liška F. Hepatic Transcriptome Profiling Reveals Lack of Acsm3 Expression in Polydactylous Rats with High-Fat Diet-Induced Hypertriglyceridemia and Visceral Fat Accumulation. Nutrients 2021; 13:nu13051462. [PMID: 33923085 PMCID: PMC8147112 DOI: 10.3390/nu13051462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 12/16/2022] Open
Abstract
Metabolic syndrome (MetS) is an important cause of worldwide morbidity and mortality. Its complex pathogenesis includes, on the one hand, sedentary lifestyle and high caloric intake, and, on the other hand, there is a clear genetic predisposition. PD (Polydactylous rat) is an animal model of hypertriglyceridemia, insulin resistance, and obesity. To unravel the genetic and pathophysiologic background of this phenotype, we compared morphometric and metabolic parameters as well as liver transcriptomes among PD, spontaneously hypertensive rat, and Brown Norway (BN) strains fed a high-fat diet (HFD). After 4 weeks of HFD, PD rats displayed marked hypertriglyceridemia but without the expected hepatic steatosis. Moreover, the PD strain showed significant weight gain, including increased weight of retroperitoneal and epididymal fat pads, and impaired glucose tolerance. In the liver transcriptome, we found 5480 differentially expressed genes, which were enriched for pathways involved in fatty acid beta and omega oxidation, glucocorticoid metabolism, oxidative stress, complement activation, triacylglycerol and lipid droplets synthesis, focal adhesion, prostaglandin synthesis, interferon signaling, and tricarboxylic acid cycle pathways. Interestingly, the PD strain, contrary to SHR and BN rats, did not express the Acsm3 (acyl-CoA synthetase medium-chain family member 3) gene in the liver. Together, these results suggest disturbances in fatty acid utilization as a molecular mechanism predisposing PD rats to hypertriglyceridemia and fat accumulation.
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Affiliation(s)
- Kristýna Junková
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
| | - Lukáš F. Mirchi
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
| | - Blanka Chylíková
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
| | - Michaela Janků
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
| | - Jan Šilhavý
- Department of Genetics of Model Diseases, Institute of Physiology, Czech Academy of Sciences, 142 20 Prague, Czech Republic;
| | - Martina Hüttl
- Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic; (M.H.); (I.M.); (D.M.); (H.M.)
| | - Irena Marková
- Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic; (M.H.); (I.M.); (D.M.); (H.M.)
| | - Denisa Miklánková
- Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic; (M.H.); (I.M.); (D.M.); (H.M.)
| | - Josef Včelák
- Institute of Endocrinology, 116 94 Prague, Czech Republic;
| | - Hana Malínská
- Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic; (M.H.); (I.M.); (D.M.); (H.M.)
| | - Michal Pravenec
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
- Department of Genetics of Model Diseases, Institute of Physiology, Czech Academy of Sciences, 142 20 Prague, Czech Republic;
| | - Ondřej Šeda
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
| | - František Liška
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, 128 00 Prague, Czech Republic; (K.J.); (L.F.M.); (B.C.); (M.J.); (M.P.); (O.Š.)
- Department of Genetics of Model Diseases, Institute of Physiology, Czech Academy of Sciences, 142 20 Prague, Czech Republic;
- Correspondence: ; Tel.: +420-224-968-154
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15
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Školníková E, Šedová L, Chylíková B, Kábelová A, Liška F, Šeda O. Maternal High-Sucrose Diet Affects Phenotype Outcome in Adult Male Offspring: Role of Zbtb16. Front Genet 2020; 11:529421. [PMID: 33061941 PMCID: PMC7518089 DOI: 10.3389/fgene.2020.529421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 08/19/2020] [Indexed: 11/13/2022] Open
Abstract
Overnutrition in pregnancy and lactation affects fetal and early postnatal development, which can result in metabolic disorders in adulthood. We tested a hypothesis that variation of the Zbtb16 gene, a significant energy metabolism regulator, modulates the effect of maternal high-sucrose diet (HSD) on metabolic and transcriptomic profiles of the offspring. We used the spontaneously hypertensive rat (SHR) strain and a minimal congenic rat strain SHR-Zbtb16, carrying the Zbtb16 gene allele originating from the PD/Cub rat, a metabolic syndrome model. Sixteen-week-old SHR and SHR-Zbtb16 rat dams were fed either standard diet (control groups) or a high-sucrose diet (HSD, 70% calories as sucrose) during pregnancy and 4 weeks of lactation. In dams of both strains, we observed an HSD-induced increase of cholesterol and triacylglycerol concentrations in VLDL particles and a decrease of cholesterol and triacylglycerols content in medium to very small LDL particles. In male offspring, exposure to maternal HSD substantially increased brown fat weight in both strains, decreased triglycerides in LDL particles, and impaired glucose tolerance exclusively in SHR. The transcriptome assessment revealed networks of transcripts reflecting the shifts induced by maternal HSD with major nodes including mir-126, Hsd11b1 in the brown adipose tissue, Pcsk9, Nr0b2 in the liver and Hsd11b1, Slc2a4 in white adipose tissue. In summary, maternal HSD feeding during pregnancy and lactation affected brown fat deposition and lipid metabolism in adult male offspring and induced major transcriptome shifts in liver, white, and brown adipose tissues. The Zbtb16 variation present in the SHR-Zbtb16 led to several strain-specific effects of the maternal HSD, particularly the transcriptomic profile shifts of the adult male offspring.
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Affiliation(s)
- Elena Školníková
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Lucie Šedová
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Blanka Chylíková
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Adéla Kábelová
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - František Liška
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
| | - Ondřej Šeda
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital, Prague, Czechia
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16
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Raj P, Ames N, Joseph Thandapilly S, Yu L, Netticadan T. The effects of oat ingredients on blood pressure in spontaneously hypertensive rats. J Food Biochem 2020; 44:e13402. [PMID: 32713035 DOI: 10.1111/jfbc.13402] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/04/2020] [Accepted: 06/28/2020] [Indexed: 12/12/2022]
Abstract
This study investigated the blood pressure (BP) lowering and cardioprotective effects of oat avenanthramide C and beta-glucan alone or in combination in spontaneously hypertensive rats (SHR). Five-weeks-old male SHR and Wistar-Kyoto rats received vehicle, avenanthramide C and beta-glucan alone or a combination of avenanthramide C and beta-glucan via gavage for 15 weeks. BP was measured at 0, 10, and 15 weeks of treatment. Echocardiography was performed at 15 weeks of treatment. Oxidative stress and inflammation were also measured. Beta-glucan alone prevented the increase in systolic and diastolic BP in SHR, but avenanthramide C alone or the combination did not prevent the increase in systolic and diastolic BP. SHRs treated with beta-glucan and not avenanthramide C or the combination reduced isovolumetric relaxation time when compared to SHR treated with vehicle. Beta-glucan and avenanthramide C decreased the levels of malondialdehyde, a marker of oxidative stress in SHR. In conclusion, beta-glucan is a potential antihypertensive agent that may alleviate cardiovascular abnormalities. PRACTICAL APPLICATIONS: Oats products are believed to contain many bioactives that possess potential beneficial properties against chronic diseases. Specifically, oats beta-glucan has been well-established for its efficacy in positively modulating the risk factor for dyslipidemia. This preliminary in vivo study shows that beta-glucan is a potential antihypertensive agent that may alleviate cardiac dysfunction as well. In light of the current findings, further human studies may establish the efficacy of oats beta-glucan in hypertensive patients alongside the current antihypertensive medications. This novel attribute established via rigorous studies may provide an impetus for oats products and oats industry. Last but not least, it will also help improve the cardiovascular disease burden in a cost-effective way.
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Affiliation(s)
- Pema Raj
- Agriculture and Agri-Food Canada, Winnipeg, MB, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, Winnipeg, MB, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB, Canada
| | - Nancy Ames
- Agriculture and Agri-Food Canada, Winnipeg, MB, Canada
- Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada
- Richardson Center for Functional Foods and Nutraceuticals, Winnipeg, MB, Canada
| | - Sijo Joseph Thandapilly
- Agriculture and Agri-Food Canada, Winnipeg, MB, Canada
- Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, MB, Canada
- Richardson Center for Functional Foods and Nutraceuticals, Winnipeg, MB, Canada
| | - Liping Yu
- Agriculture and Agri-Food Canada, Winnipeg, MB, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, Winnipeg, MB, Canada
| | - Thomas Netticadan
- Agriculture and Agri-Food Canada, Winnipeg, MB, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, Winnipeg, MB, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB, Canada
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17
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Grandmother's Diet Matters: Early Life Programming with Sucrose Influences Metabolic and Lipid Parameters in Second Generation of Rats. Nutrients 2020; 12:nu12030846. [PMID: 32245222 PMCID: PMC7146346 DOI: 10.3390/nu12030846] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/13/2020] [Accepted: 03/19/2020] [Indexed: 12/12/2022] Open
Abstract
Early life exposure to certain environmental stimuli is related to the development of alternative phenotypes in mammals. A number of these phenotypes are related to an increased risk of disease later in life, creating a massive healthcare burden. With recent focus on the determination of underlying causes of common metabolic disorders, parental nutrition is of great interest, mainly due to a global shift towards a Western-type diet. Recent studies focusing on the increase of food or macronutrient intake don't always consider the source of these nutrients as an important factor. In our study, we concentrate on the effects of high-sucrose diet, which provides carbohydrates in form of sucrose as opposed to starch in standard diet, fed in pregnancy and lactation in two subsequent generations of spontaneously hypertensive rats (SHR) and congenic SHR-Zbtb16 rats. Maternal sucrose intake increased fasting glycaemia in SHR female offspring in adulthood and increased their chow consumption in gravidity. High-sucrose diet fed to the maternal grandmother increased brown fat weight and HDL cholesterol levels in adult male offspring of both strains, i.e., the grandsons. Fasting glycaemia was however decreased only in SHR offspring. In conclusion, we show the second-generation effects of maternal exposition to a high-sucrose diet, some modulated to a certain extent by variation in the Zbtb16 gene.
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18
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Borghi F, Morais CL, Silva C, da Silva PC, Ishizu LY, Costa GT, Grassi-Kassisse DM. A new perspective of lactatogenesis by isolated adipocytes. Mol Cell Endocrinol 2019; 498:110560. [PMID: 31442545 DOI: 10.1016/j.mce.2019.110560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/02/2019] [Accepted: 08/19/2019] [Indexed: 11/24/2022]
Abstract
Increased adipose tissue mass exhibited greater capacity of glucose transformation in lactate, highlighting lactatogenesis as a crucial factor in body size. Classically, lactate produced by isolated adipocytes are expressed per million of cells and were never correlated with their size. Spontaneously hypertensive rats (SHR) have a lower body weight and smaller adipocytes when compared to Wistar-Kyoto. We evaluated basal lactate by epididymal 15-weeks-old isolated adipocytes of SHR, Wistar-Kyoto and Wistar. Basal lactate was similar when expressed by one million cells. However, SHR adipocytes were smaller, so we adjusted the results by cell volume and SHR showed higher basal lactate production which was directly endorsed by hyperlactatemia in the presented conditions. Thereby, we suggest a new perspective on lactatogenesis analysis by adipocytes, which could be linked to the receptors density and associate enzymes. Moreover, we showed that the thin and hypertensive rats can be hyperlactemic in fasting conditions.
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Affiliation(s)
- Filipy Borghi
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Camila L Morais
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Carolina Silva
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Priscila C da Silva
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Larissa Y Ishizu
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Gustavo T Costa
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Dora M Grassi-Kassisse
- LABEEST - Laboratory of Stress Study, Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil.
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19
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Lerman LO, Kurtz TW, Touyz RM, Ellison DH, Chade AR, Crowley SD, Mattson DL, Mullins JJ, Osborn J, Eirin A, Reckelhoff JF, Iadecola C, Coffman TM. Animal Models of Hypertension: A Scientific Statement From the American Heart Association. Hypertension 2019; 73:e87-e120. [PMID: 30866654 DOI: 10.1161/hyp.0000000000000090] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hypertension is the most common chronic disease in the world, yet the precise cause of elevated blood pressure often cannot be determined. Animal models have been useful for unraveling the pathogenesis of hypertension and for testing novel therapeutic strategies. The utility of animal models for improving the understanding of the pathogenesis, prevention, and treatment of hypertension and its comorbidities depends on their validity for representing human forms of hypertension, including responses to therapy, and on the quality of studies in those models (such as reproducibility and experimental design). Important unmet needs in this field include the development of models that mimic the discrete hypertensive syndromes that now populate the clinic, resolution of ongoing controversies in the pathogenesis of hypertension, and the development of new avenues for preventing and treating hypertension and its complications. Animal models may indeed be useful for addressing these unmet needs.
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20
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Mirchi LF, Chylíková B, Janků M, Šeda O, Liška F. Transcriptomic analysis of left ventricle myocardium in an SHR congenic line with ameliorated cardiac fibrosis. Physiol Res 2019; 68:747-755. [PMID: 31424260 DOI: 10.33549/physiolres.934127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Metabolic syndrome and one of its manifestations, essential hypertension, is an important cause of worldwide morbidity and mortality. Morbidity and mortality associated with hypertension are caused by organ complications. Previously we revealed a decrease of blood pressure and an amelioration of cardiac fibrosis in a congenic line of spontaneously hypertensive rats (SHR), in which a short segment of chromosome 8 (encompassing only 7 genes) was exchanged for a segment of normotensive polydactylous (PD) origin. To unravel the genetic background of this phenotype we compared heart transcriptomes between SHR rat males and this chromosome 8 minimal congenic line (PD5). We found 18 differentially expressed genes, which were further analyzed using annotations from Database for Annotation, Visualization and Integrated Discovery (DAVID). Four of the differentially expressed genes (Per1, Nr4a1, Nr4a3, Kcna5) belong to circadian rhythm pathways, aldosterone synthesis and secretion, PI3K-Akt signaling pathway and potassium homeostasis. We were also able to confirm Nr4a1 2.8x-fold upregulation in PD5 on protein level using Western blotting, thus suggesting a possible role of Nr4a1 in pathogenesis of the metabolic syndrome.
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Affiliation(s)
- L F Mirchi
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic.
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21
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Tiyasatkulkovit W, Promruk W, Rojviriya C, Pakawanit P, Chaimongkolnukul K, Kengkoom K, Teerapornpuntakit J, Panupinthu N, Charoenphandhu N. Impairment of bone microstructure and upregulation of osteoclastogenic markers in spontaneously hypertensive rats. Sci Rep 2019; 9:12293. [PMID: 31444374 PMCID: PMC6707260 DOI: 10.1038/s41598-019-48797-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 08/13/2019] [Indexed: 12/12/2022] Open
Abstract
Hypertension and osteoporosis are the major non-communicable diseases in the elderly worldwide. Although clinical studies reported that hypertensive patients experienced significant bone loss and likelihood of fracture, the causal relationship between hypertension and osteoporosis has been elusive due to other confounding factors associated with these diseases. In this study, spontaneously hypertensive rats (SHR) were used to address this relationship and further explored the biophysical properties and the underlying mechanisms. Long bones of the hind limbs from 18-week-old female SHR were subjected to determination of bone mineral density (BMD) and their mechanical properties. Using synchrotron radiation X-ray tomographic microscopy (SRXTM), femoral heads of SHR displayed marked increase in porosity within trabecular area together with decrease in cortical thickness. The volumetric micro-computed tomography also demonstrated significant decreases in trabecular BMD, cortical thickness and total cross-sectional area of the long bones. These changes also led to susceptibility of the long bones to fracture indicated by marked decreases in yield load, stiffness and maximum load using three-point bending tests. At the cellular mechanism, an increase in the expression of osteoclastogenic markers with decrease in the expression of alkaline phosphatase was found in primary osteoblast-enriched cultures isolated from long bones of these SHR suggesting an imbalance in bone remodeling. Taken together, defective bone mass and strength in hypertensive rats were likely due to excessive bone resorption. Development of novel therapeutic interventions that concomitantly target hypertension and osteoporosis should be helpful in reduction of unwanted outcomes, such as bone fractures, in elderly patients.
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Affiliation(s)
- Wacharaporn Tiyasatkulkovit
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.,Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Worachet Promruk
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.,Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Catleya Rojviriya
- Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, 30000, Thailand
| | - Phakkhananan Pakawanit
- Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, 30000, Thailand
| | | | - Kanchana Kengkoom
- National Laboratory Animal Center, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Jarinthorn Teerapornpuntakit
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.,Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Nattapon Panupinthu
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.,Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Narattaphol Charoenphandhu
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand. .,Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand. .,Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, 73170, Thailand. .,The Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, 10300, Thailand.
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Lee SY, Hur SJ. Purification of novel angiotensin converting enzyme inhibitory peptides from beef myofibrillar proteins and analysis of their effect in spontaneously hypertensive rat model. Biomed Pharmacother 2019; 116:109046. [PMID: 31174091 DOI: 10.1016/j.biopha.2019.109046] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/21/2019] [Accepted: 05/29/2019] [Indexed: 12/12/2022] Open
Abstract
This study was conducted to purify the angiotensin converting enzyme (ACE) inhibitory peptides from beef myofibrillar proteins by using inexpensive enzymes alkaline-AK and papain. Different molecular weight peptides (<3 and <10 kDa) were obtained using ultrafiltration. The <3 kDa peptides obtained by alkaline-AK (AK3K) digestion showed the highest ACE inhibitory activity (74.29%) as compared to other alkaline-AK peptides, and a strong antihypertensive effect of AK3K was observed in the spontaneously hypertensive rat (SHR) model. The AK3K treatment groups (400 and 800 mg/kg body weight) exhibited a decrease in systolic blood pressure (SBP) by 28 and 35 mmHg, respectively in the SHR model. The study demonstrated that the ACE inhibitory peptide obtained from beef myofibrillar proteins had the sequence Leu-Ile-Val-Gly-Ile-Ile-Arg-Cys-Val, and could be possibly used for lowering the SBP.
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Affiliation(s)
- Seung Yun Lee
- Department of Animal Science and Technology, Chung-Ang University, 4726 Seodong-daero, Daedeok-myeon, Anseong-si, Gyeonggi 17546, Republic of Korea
| | - Sun Jin Hur
- Department of Animal Science and Technology, Chung-Ang University, 4726 Seodong-daero, Daedeok-myeon, Anseong-si, Gyeonggi 17546, Republic of Korea.
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Menezes-Rodrigues FS, Errante PR, Tavares JGP, Ferraz RRN, Gomes WJ, Taha MO, Scorza CA, Scorza FA, Caricati-Neto A. Pharmacological modulation of b-adrenoceptors as a new cardioprotective strategy for therapy of myocardial dysfunction induced by ischemia and reperfusion. Acta Cir Bras 2019; 34:e201900505. [PMID: 31166461 PMCID: PMC6583939 DOI: 10.1590/s0102-865020190050000005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/25/2019] [Indexed: 01/29/2023] Open
Abstract
Purpose: To evaluate the cardioprotective response of the pharmacological modulation of β-adrenergic receptors (β-AR) in animal model of cardiac ischemia and reperfusion (CIR), in spontaneously hypertensive (SHR) and normotensive (NWR) rats. Methods: CIR was induced by the occlusion of left anterior descendent coronary artery (10 min) and reperfusion (75 min). The SHR was treated with β-AR antagonist atenolol (AT, 10 mg/kg, IV) 5 min before CIR, and NWR were treated with β-AR agonist isoproterenol (ISO, 0.5 mg/kg, IV) 5 min before CIR. Results: The treatment with AT increased the incidence of VA, AVB and LET in SHR, suggesting that spontaneous cardioprotection in hypertensive animals was abolished by blockade of β-AR. In contrast, the treatment with ISO significantly reduced the incidence of ventricular arrhythmia, atrioventricular blockade and lethality in NWR (30%, 20% and 20%, respectively), suggesting that the activation of β-AR stimulate cardioprotection in normotensive animals. Serum CK-MB were higher in SHR/CIR and NWR/CIR compared to respective SHAM group (not altered by treatment with AT or ISO). Conclusion: The pharmacological modulation of β-AR could be a new cardioprotective strategy for the therapy of myocardial dysfunctions induced by CIR related to cardiac surgery and cardiovascular diseases.
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Segiet A, Smykiewicz P, Kwiatkowski P, Żera T. Tumour necrosis factor and interleukin 10 in blood pressure regulation in spontaneously hypertensive and normotensive rats. Cytokine 2019; 113:185-194. [DOI: 10.1016/j.cyto.2018.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 04/30/2018] [Accepted: 07/02/2018] [Indexed: 02/07/2023]
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Abstract
One of the most fruitful resources for systems genetic studies of nonhuman mammals is a panel of inbred strains that exhibits significant genetic diversity between strains but genetic stability (isogenicity) within strains. These characteristics allow for fine mapping of complex phenotypes (QTLs) and provide statistical power to identify loci which contribute nominally to the phenotype. This type of resource also allows the planning and performance of investigations using the same genetic backgrounds over several generations of the test animals. Often, rats are preferred over mice for physiologic and behavioral studies because of their larger size and more distinguishable anatomy (particularly for their central nervous system). The Hybrid Rat Diversity Panel (HRDP) is a panel of inbred rat strains, which combines two recombinant inbred panels (the HXB/BXH, 30 strains; the LEXF/FXLE, 34 strains and 35 more strains of inbred rats which were selected for genetic diversity, based on their fully sequenced genomes and/or thorough genotyping). The genetic diversity and statistical power of this panel for mapping studies rivals or surpasses currently available panels in mouse. The genetic stability of this panel makes it particularly suitable for collection of high-throughput omics data as relevant technology becomes available for engaging in truly integrative systems biology. The PhenoGen website ( http://phenogen.org ) is the repository for the initial transcriptome data, making the raw data, the processed data, and the analysis results, e.g., organ-specific protein coding and noncoding transcripts, isoform analysis, expression quantitative trait loci, and co-expression networks, available to the research public. The data sets and tools being developed will complement current efforts to analyze the human transcriptome and its genetic controls (the Genotype-Tissue Expression Project (GTEx)) and allow for dissection of genetic networks that predispose to particular phenotypes and gene-by-environment interactions that are difficult or even impossible to study in humans. The HRDP is an essential population for exploring truly integrative systems genetics.
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Abstract
Metabolic syndrome is a complex disorder that comprises several other complex disorders, including obesity, hypertension, dyslipidemia, and diabetes. There are several rat models that encompass component features of MetS. Some models are inbred strains selected for one or more traits underlying MetS; others are population models with genetic risk for MetS traits, are induced by environmental stressors such as diet, are spontaneous monogenic mutant models, or are congenic strains derived from a combination of these models. Together they can be studied to identify the genetic and physiological underpinnings of MetS to identify candidate genes or mechanisms for study in human MetS subjects.
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Affiliation(s)
- Anne E Kwitek
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA.
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Šilhavý J, Mlejnek P, Šimáková M, Vaněčková I, Behuliak M, Kuda O, Sticová E, Jirsa M, Pravenec M. Acute toxic effects of telmisartan in spontaneously hypertensive rats fed a high fructose diet. Physiol Res 2018; 67:851-856. [PMID: 30204469 DOI: 10.33549/physiolres.933951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Telmisartan is an angiotensin receptor blocker (ARB) and a selective peroxisome proliferator activated receptor gamma (PPARG) modulator. Recently, we tested metabolic effects of telmisartan (5 mg/kg body weight) in spontaneously hypertensive rats (SHR) fed a diet containing 60 % fructose, a widely used model of the metabolic syndrome. Surprisingly, we observed acute toxic effects of telmisartan. Rats lost body weight rapidly and died within 2 to 3 weeks due to bleeding into the upper gastrointestinal tract. SHR fed a high fructose diet and treated with telmisartan exhibited rapid decrease in blood pressure when compared to the SHR fed a high fructose diet and treated with valsartan. Concentrations of both unconjugated telmisartan and telmisartan glucuronide in the liver of SHR rats fed a high fructose diet were approximately 4 fold higher when compared to Brown Norway (BN) rats fed the same diet. Plasma concentrations of unconjugated telmisartan in the SHR were about 5 fold higher when compared to BN rats while plasma levels of telmisartan glucuronide were similar between the strains. Testing of other rat strains, diets, and the ARB valsartan showed that toxic effects of telmisartan in combination with high fructose diet are specific for the SHR. These results are consistent with the possibility that in some circumstances, SHR are predisposed to telmisartan toxicity possibly because of a genetically determined disturbance in telmisartan metabolism.
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Affiliation(s)
- J Šilhavý
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic.
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28
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Kuda O, Brezinova M, Silhavy J, Landa V, Zidek V, Dodia C, Kreuchwig F, Vrbacky M, Balas L, Durand T, Hübner N, Fisher AB, Kopecky J, Pravenec M. Nrf2-Mediated Antioxidant Defense and Peroxiredoxin 6 Are Linked to Biosynthesis of Palmitic Acid Ester of 9-Hydroxystearic Acid. Diabetes 2018; 67:1190-1199. [PMID: 29549163 PMCID: PMC6463562 DOI: 10.2337/db17-1087] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 03/08/2018] [Indexed: 12/12/2022]
Abstract
Fatty acid esters of hydroxy fatty acids (FAHFAs) are lipid mediators with promising antidiabetic and anti-inflammatory properties that are formed in white adipose tissue (WAT) via de novo lipogenesis, but their biosynthetic enzymes are unknown. Using a combination of lipidomics in WAT, quantitative trait locus mapping, and correlation analyses in rat BXH/HXB recombinant inbred strains, as well as response to oxidative stress in murine models, we elucidated the potential pathway of biosynthesis of several FAHFAs. Comprehensive analysis of WAT samples identified ∼160 regioisomers, documenting the complexity of this lipid class. The linkage analysis highlighted several members of the nuclear factor, erythroid 2 like 2 (Nrf2)-mediated antioxidant defense system (Prdx6, Mgst1, Mgst3), lipid-handling proteins (Cd36, Scd6, Acnat1, Acnat2, Baat), and the family of flavin containing monooxygenases (Fmo) as the positional candidate genes. Transgenic expression of Nrf2 and deletion of Prdx6 genes resulted in reduction of palmitic acid ester of 9-hydroxystearic acid (9-PAHSA) and 11-PAHSA levels, while oxidative stress induced by an inhibitor of glutathione synthesis increased PAHSA levels nonspecifically. Our results indicate that the synthesis of FAHFAs via carbohydrate-responsive element-binding protein-driven de novo lipogenesis depends on the adaptive antioxidant system and suggest that FAHFAs may link activity of this system with insulin sensitivity in peripheral tissues.
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Affiliation(s)
- Ondrej Kuda
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Marie Brezinova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Silhavy
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Vladimir Landa
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Vaclav Zidek
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Chandra Dodia
- Institute for Environmental Medicine and Department of Physiology, University of Pennsylvania, Philadelphia, PA
| | - Franziska Kreuchwig
- Max Delbrück Center for Molecular Medicine, German Centre for Cardiovascular Research, and Charité - Universitätsmedizin, Berlin, Germany
| | - Marek Vrbacky
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Laurence Balas
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université Montpellier, ENSCM, Faculté de Pharmacie, Montpellier, France
| | - Thierry Durand
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université Montpellier, ENSCM, Faculté de Pharmacie, Montpellier, France
| | - Norbert Hübner
- Max Delbrück Center for Molecular Medicine, German Centre for Cardiovascular Research, and Charité - Universitätsmedizin, Berlin, Germany
| | - Aron B Fisher
- Institute for Environmental Medicine and Department of Physiology, University of Pennsylvania, Philadelphia, PA
| | - Jan Kopecky
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
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miRNA Profiling of Exosomes from Spontaneous Hypertensive Rats Using Next-Generation Sequencing. J Cardiovasc Transl Res 2018; 12:75-83. [PMID: 29557993 DOI: 10.1007/s12265-017-9784-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/28/2017] [Indexed: 01/20/2023]
Abstract
The role and miRNA expression profile of exosomes in hypertension remain largely unknown. Therefore, next-generation sequencing was used to define the miRNA expression profile of plasma exosomes in spontaneously hypertensive rats (SHRs), the most widely used animal model of human essential hypertension, and their controls, normotensive Wistar-Kyoto rats (WKYs). Results revealed that percentages of miRNA in the total small RNA isolated from SHRs and WKYs were not significantly different. Twenty-seven miRNAs were significantly differentially expressed (DE) between SHR and WKY exosomes, including 23 up-regulated and four down-regulated in SHR exosomes as compared to WKY exosomes. Gene Ontology analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis of top 10 DE miRNAs identified hypertension-specific target genes/signaling pathways. In conclusion, our findings indicated the selective packing of miRNA cargo into exosomes under hypertensive status, which could facilitate the development of potential targets for the diagnosis, prevention, and treatment of hypertension.
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Krupková M, Liška F, Kazdová L, Šedová L, Kábelová A, Křenová D, Křen V, Šeda O. Single-Gene Congenic Strain Reveals the Effect of Zbtb16 on Dexamethasone-Induced Insulin Resistance. Front Endocrinol (Lausanne) 2018; 9:185. [PMID: 29731739 PMCID: PMC5919955 DOI: 10.3389/fendo.2018.00185] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/05/2018] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Glucocorticoids (GCs) are potent therapeutic agents frequently used for treatment of number of conditions, including hematologic, inflammatory, and allergic diseases. Both their therapeutic and adverse effects display significant interindividual variation, partially attributable to genetic factors. We have previously isolated a seven-gene region of rat chromosome 8 sensitizing to dexamethasone (DEX)-induced dyslipidemia and insulin resistance (IR) of skeletal muscle. Using two newly derived congenic strains, we aimed to investigate the effect of one of the prime candidates for this pharmacogenetic interaction, the Zbtb16 gene. METHODS Adult male rats of SHR-Lx.PD5PD-Zbtb16 (n = 9) and SHR-Lx.PD5SHR-Zbtb16 (n = 8) were fed standard diet (STD) and subsequently treated with DEX in drinking water (2.6 µg/ml) for 3 days. The morphometric and metabolic profiles of both strains including oral glucose tolerance test, triacylglycerols (TGs), free fatty acids, insulin, and C-reactive protein levels were assessed before and after the DEX treatment. Insulin sensitivity of skeletal muscle and visceral adipose tissue was determined by incorporation of radioactively labeled glucose. RESULTS The differential segment of SHR-Lx.PD5SHR-Zbtb16 rat strain spans 563 kb and contains six genes: Htr3a, Htr3b, Usp28, Zw10, Tmprss5, and part of Drd2. The SHR-Lx.PD5PD-Zbtb16 minimal congenic strain contains only Zbtb16 gene on SHR genomic background and its differential segment spans 254 kb. Total body weight was significantly increased in SHR-Lx.PD5PD-Zbtb16 strain compared with SHR-Lx.PD5SHR-Zbtb16 , however, no differences in the weights of adipose tissue depots were observed. While STD-fed rats of both strains did not show major differences in their metabolic profiles, after DEX treatment the SHR-Lx.PD5PD-Zbtb16 congenic strain showed increased levels of TGs, glucose, and blunted inhibition of lipolysis by insulin. Both basal and insulin-stimulated incorporation of radioactively labeled glucose into skeletal muscle glycogen were significantly reduced in SHR-Lx.PD5PD-Zbtb16 strain, but the insulin sensitivity of adipose tissue was comparable between the two strains. CONCLUSION The metabolic disturbances including impaired glucose tolerance, dyslipidemia, and IR of skeletal muscle observed after DEX treatment in the congenic SHR-Lx.PD5PD-Zbtb16 reveal the Zbtb16 locus as a possible sensitizing factor for side effects of GC therapy.
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Affiliation(s)
- Michaela Krupková
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
| | - František Liška
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
| | - Ludmila Kazdová
- Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czechia
| | - Lucie Šedová
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Prague, Czechia
| | - Adéla Kábelová
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
| | - Drahomíra Křenová
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
| | - Vladimír Křen
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
| | - Ondřej Šeda
- The First Faculty of Medicine, Institute of Biology and Medical Genetics, Charles University, The General Teaching Hospital, Prague, Czechia
- *Correspondence: Ondřej Šeda,
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31
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Pravenec M, Saba LM, Zídek V, Landa V, Mlejnek P, Šilhavý J, Šimáková M, Strnad H, Trnovská J, Škop V, Hüttl M, Marková I, Oliyarnyk O, Malínská H, Kazdová L, Smith H, Tabakoff B. Systems genetic analysis of brown adipose tissue function. Physiol Genomics 2017; 50:52-66. [PMID: 29127223 DOI: 10.1152/physiolgenomics.00091.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Brown adipose tissue (BAT) has been suggested to play an important role in lipid and glucose metabolism in rodents and possibly also in humans. In the current study, we used genetic and correlation analyses in the BXH/HXB recombinant inbred (RI) strains, derived from Brown Norway (BN) and spontaneously hypertensive rats (SHR), to identify genetic determinants of BAT function. Linkage analyses revealed a quantitative trait locus (QTL) associated with interscapular BAT mass on chromosome 4 and two closely linked QTLs associated with glucose oxidation and glucose incorporation into BAT lipids on chromosome 2. Using weighted gene coexpression network analysis (WGCNA) we identified 1,147 gene coexpression modules in the BAT from BXH/HXB rats and mapped their module eigengene QTLs. Through an unsupervised analysis, we identified modules related to BAT relative mass and function. The Coral4.1 coexpression module is associated with BAT relative mass (includes Cd36 highly connected gene), and the Darkseagreen coexpression module is associated with glucose incorporation into BAT lipids (includes Hiat1, Fmo5, and Sort1 highly connected transcripts). Because multiple statistical criteria were used to identify candidate modules, significance thresholds for individual tests were not adjusted for multiple comparisons across modules. In summary, a systems genetic analysis using genomic and quantitative transcriptomic and physiological information has produced confirmation of several known genetic factors and significant insight into novel genetic components functioning in BAT and possibly contributing to traits characteristic of the metabolic syndrome.
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Affiliation(s)
- Michal Pravenec
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Laura M Saba
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Václav Zídek
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Vladimír Landa
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Petr Mlejnek
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Jan Šilhavý
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Miroslava Šimáková
- Institute of Physiology of the Czech Academy of Sciences , Prague , Czech Republic
| | - Hynek Strnad
- Institute of Molecular Genetics of the Czech Academy of Sciences , Prague , Czech Republic
| | - Jaroslava Trnovská
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Vojtěch Škop
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Martina Hüttl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Irena Marková
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Olena Oliyarnyk
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Hana Malínská
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Ludmila Kazdová
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Harry Smith
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus , Aurora, Colorado.,Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus , Aurora, Colorado
| | - Boris Tabakoff
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus , Aurora, Colorado
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ŠEDA O, LIŠKA F, PRAVENEC M, VERNEROVÁ Z, KAZDOVÁ L, KŘENOVÁ D, ZÍDEK V, ŠEDOVÁ L, KRUPKOVÁ M, KŘEN V. Connexin 50 Mutation Lowers Blood Pressure in Spontaneously Hypertensive Rat. Physiol Res 2017; 66:15-28. [DOI: 10.33549/physiolres.933432] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We assessed the effect of the previously uncovered gap junction protein alpha 8 (Gja8) mutation present in spontaneously hypertensive rat – dominant cataract (SHR-Dca) strain on blood pressure, metabolic profile, and heart and renal transcriptomes. Adult, standard chow-fed male rats of SHR and SHR-Dca strains were used. We found a significant, consistent 10-15 mmHg decrease in both systolic and diastolic blood pressures in SHR-Dca compared with SHR (P<0.01 and P<0.05, respectively; repeated measures analysis of variance (ANOVA)). With immunohistochemistry, we were able to localize Gja8 in heart, kidney, aorta, liver, and lungs, mostly in endothelium; with no differences in expression between strains. SHR-Dca rats showed decreased body weight, high-density lipoprotein cholesterol concentrations and basal insulin sensitivity in muscle. There were 21 transcripts common to the sets of 303 transcripts in kidney and 487 in heart showing >1.2-fold difference in expression between SHR and SHR-Dca. Tumor necrosis factor was the most significant upstream regulator and glial cell-derived neurotrophic factor family ligand-receptor interactions was the common enriched and downregulated canonical pathway both in heart and kidney of SHR-Dca. The connexin 50 mutation L7Q lowers blood pressure in the SHR-Dca strain, decreases high-density lipoprotein cholesterol, and leads to substantial transcriptome changes in heart and kidney.
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Affiliation(s)
- O. ŠEDA
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, Prague, Czech Republic
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Liu X, Yuan W, Li J, Yang L, Cai J. ANTXR2 Knock-Out Does Not Result in the Development of Hypertension in Rats. Am J Hypertens 2017; 30:182-187. [PMID: 28077422 DOI: 10.1093/ajh/hpw125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Our recent genetic study as well as robust evidences reported by previous genome-wide association studies (GWASs) have indicated that the single nucleotide polymorphism rs16998073, located near gene anthrax toxin receptor 2 (ANTXR2), was significantly associated with hypertension in Asians and Europeans. The aim of the present study was to determine whether ANTXR2 is the causal gene of hypertension at the 4q21 locus using an ANTXR2 knock-out model. METHODS Relative expression of ANTXR2 in Wistar-Kyoto rats (WKYs) and spontaneously hypertensive rats (SHRs) were determined by real-time quantitative polymerase chain reaction and western blot analysis. ANTXR2 knock-out rats were created using CRISPR/Cas9-mediated genome editing and blood pressure values were measured in ANTXR2-/- and wild type (WT) rats by tail-cuff method and carotid arterial catheterization method. RESULTS Neither the mRNA nor protein levels of ANTXR2 were significantly different between tissues from SHRs and WKYs. To create ANTXR2-/- rats, 67 base pairs were deleted in exon 1 of ANTXR2 using CRISPR/Cas9-mediated genome editing. ANTXR2 protein decreased significantly in aortas of ANTXR2-/- rats, suggesting sufficient efficiency of ANTXR2 knock-out in this model. However, ANTXR2-/- rats exhibited nearly the same blood pressure as WT rats at baseline conditions as well as during Angiotensin II (400ng/kg/min) infusion or high-salt diet treatment. CONCLUSIONS These findings suggest that ANTXR2 might not be associated with hypertension and thus further functional analysis is warranted to identify the causal gene at this locus.
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Affiliation(s)
- Xiaoyan Liu
- Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Wen Yuan
- Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jing Li
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Hypertension, Beijing, China
| | - Lei Yang
- Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jun Cai
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China;
- Beijing Key Laboratory of Hypertension, Beijing, China
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Pravenec M, Kožich V, Krijt J, Sokolová J, Zídek V, Landa V, Mlejnek P, Šilhavý J, Šimáková M, Škop V, Trnovská J, Kazdová L, Kajiya T, Wang J, Kurtz TW. Genetic Variation in Renal Expression ofFolate Receptor 1(Folr1) Gene Predisposes Spontaneously Hypertensive Rats to Metabolic Syndrome. Hypertension 2016; 67:335-41. [DOI: 10.1161/hypertensionaha.115.06158] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 11/18/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Michal Pravenec
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Viktor Kožich
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Jakub Krijt
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Jitka Sokolová
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Václav Zídek
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Vladimír Landa
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Petr Mlejnek
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Jan Šilhavý
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Miroslava Šimáková
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Vojtěch Škop
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Jaroslava Trnovská
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Ludmila Kazdová
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Takashi Kajiya
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Jiaming Wang
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
| | - Theodore W. Kurtz
- From the Department of Model Diseases, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic (M.P., V.Z., V.L., P.M., J.Š., M.Š.); Institute of Inherited Metabolic Disorders, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic (V.K., J.K., J.Š.); Center of Experimental Medicine, Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (V.Š., J.T., L.K.); and
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da Silva GAR, de Aguiar Mendes VA, Genari AB, Castania JA, Salgado HC, Fazan VPS. Recurrent laryngeal nerve alterations in developing spontaneously hypertensive rats. Laryngoscope 2015; 126:E40-7. [DOI: 10.1002/lary.25426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/16/2015] [Accepted: 05/18/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Greice Anne Rodrigues da Silva
- Department of Neuroscience and Behavioral Sciences; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Vania Alice de Aguiar Mendes
- Department of Neuroscience and Behavioral Sciences; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Adriana Borges Genari
- Department of Neuroscience and Behavioral Sciences; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Jaci Ayrton Castania
- Department of Physiology; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Hélio Cesar Salgado
- Department of Physiology; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Valéria Paula Sassoli Fazan
- Department of Neuroscience and Behavioral Sciences; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
- Department of Surgery and Anatomy; School of Medicine of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
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DeCicco D, Zhu H, Brureau A, Schwaber JS, Vadigepalli R. MicroRNA network changes in the brain stem underlie the development of hypertension. Physiol Genomics 2015; 47:388-99. [PMID: 26126791 DOI: 10.1152/physiolgenomics.00047.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 06/29/2015] [Indexed: 01/12/2023] Open
Abstract
Hypertension is a major chronic disease whose molecular mechanisms remain poorly understood. We compared neuroanatomical patterns of microRNAs in the brain stem of the spontaneous hypertensive rat (SHR) to the Wistar Kyoto rat (WKY, control). We quantified 419 well-annotated microRNAs in the nucleus of the solitary tract (NTS) and rostral ventrolateral medulla (RVLM), from SHR and WKY rats, during three main stages of hypertension development. Changes in microRNA expression were stage- and region-dependent, with a majority of SHR vs. WKY differential expression occurring at the hypertension onset stage in NTS versus at the prehypertension stage in RVLM. Our analysis identified 24 microRNAs showing time-dependent differential expression in SHR compared with WKY in at least one brain region. We predicted potential gene regulatory targets corresponding to catecholaminergic processes, neuroinflammation, and neuromodulation using the miRWALK and RNA22 databases, and we tested those bioinformatics predictions using high-throughput quantitative PCR to evaluate correlations of differential expression between the microRNAs and their predicted gene targets. We found a novel regulatory network motif consisting of microRNAs likely downregulating a negative regulator of prohypertensive processes such as angiotensin II signaling and leukotriene-based inflammation. Our results provide new evidence on the dynamics of microRNA expression in the development of hypertension and predictions of microRNA-mediated regulatory networks playing a region-dependent role in potentially altering brain-stem cardiovascular control circuit function leading to the development of hypertension.
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Affiliation(s)
- Danielle DeCicco
- Department of Pathology, Anatomy and Cell Biology, Daniel Baugh Institute for Functional Genomics/Computational Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Haisun Zhu
- Department of Pathology, Anatomy and Cell Biology, Daniel Baugh Institute for Functional Genomics/Computational Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Anthony Brureau
- Department of Pathology, Anatomy and Cell Biology, Daniel Baugh Institute for Functional Genomics/Computational Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - James S Schwaber
- Department of Pathology, Anatomy and Cell Biology, Daniel Baugh Institute for Functional Genomics/Computational Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Rajanikanth Vadigepalli
- Department of Pathology, Anatomy and Cell Biology, Daniel Baugh Institute for Functional Genomics/Computational Biology, Thomas Jefferson University, Philadelphia, Pennsylvania
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Trnovská J, Šilhavý J, Zídek V, Šimáková M, Mlejnek P, Landa V, Eigner S, Eigner Henke K, Škop V, Oliyarnyk O, Kazdová L, Mráček T, Houštěk J, Pravenec M. Gender-related effects on substrate utilization and metabolic adaptation in hairless spontaneously hypertensive rat. Physiol Res 2014; 64:51-60. [PMID: 25194136 DOI: 10.33549/physiolres.932823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cold exposure of rats leads to ameliorated glucose and triglyceride utilization with females displaying better adaptation to a cold environment. In the current study, we used hairless rats as a model of increased thermogenesis and analyzed gender-related effects on parameters of lipid and glucose metabolism in the spontaneously hypertensive (SHR) rats. Specifically, we compared hairless coisogenic SHR-Dsg4 males and females harboring mutant Dsg4 (desmoglein 4) gene versus their SHR wild type controls. Two way ANOVA showed significant Dsg4 genotype (hairless or wild type) x gender interaction effects on palmitate oxidation in brown adipose tissue (BAT), glucose incorporation into BAT determined by microPET, and glucose oxidation in skeletal muscles. In addition, we observed significant interaction effects on sensitivity of muscle tissue to insulin action when Dsg4 genotype affected these metabolic traits in males, but had little or no effects in females. Both wild type and hairless females and hairless males showed increased glucose incorporation and palmitate oxidation in BAT and higher tissue insulin sensitivity when compared to wild type males. These findings provide evidence for gender-related differences in metabolic adaptation required for increased thermogenesis. They are consistent with the hypothesis that increased glucose and palmitate utilization in BAT and muscle is associated with higher sensitivity of adipose and muscle tissues to insulin action.
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Affiliation(s)
- J Trnovská
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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