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Fang J, Wang W, Sun S, Wang Y, Li Q, Lu X, Hao Z, Zhang Y. A urine metabonomics study of chronic renal failure and intervention effects of total aglycone extracts of Scutellaria baicalensis in 5/6 nephrectomy rats. RSC Adv 2015. [DOI: 10.1039/c5ra12710f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
This study was to clarify the pathogenesis of CRF and action mechanism of TAES.
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Affiliation(s)
- Junwei Fang
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Wenyu Wang
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
- MacroStat (China) Clinical Research Co., Ltd
| | - Shujun Sun
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Yang Wang
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Qianhua Li
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Xiong Lu
- Experiment Center for Science and Technology
- Shanghai University of Traditional
- Chinese Medicine
- Shanghai 201203
- China
| | - Zhihui Hao
- Laboratories of Biological Pharmaceutical
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Yongyu Zhang
- Center for Traditional Chinese Medicine and Systems Biology
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
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102
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Jia Z, Nallasamy P, Liu D, Shah H, Li JZ, Chitrakar R, Si H, McCormick J, Zhu H, Zhen W, Li Y. Luteolin protects against vascular inflammation in mice and TNF-alpha-induced monocyte adhesion to endothelial cells via suppressing IΚBα/NF-κB signaling pathway. J Nutr Biochem 2014; 26:293-302. [PMID: 25577468 DOI: 10.1016/j.jnutbio.2014.11.008] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/06/2014] [Accepted: 11/13/2014] [Indexed: 01/09/2023]
Abstract
Vascular inflammation plays a significant role in the pathogenesis of atherosclerosis. Luteolin, a naturally occurring flavonoid present in many medicinal plants and some commonly consumed fruits and vegetables, has received wide attention for its potential to improve vascular function in vitro. However, its effect in vivo and the molecular mechanism of luteolin at physiological concentrations remain unclear. Here, we report that luteolin as low as 0.5 μM significantly inhibited tumor necrosis factor (TNF)-α-induced adhesion of monocytes to human EA.hy 926 endothelial cells, a key event in triggering vascular inflammation. Luteolin potently suppressed TNF-α-induced expression of the chemokine monocyte chemotactic protein-1 (MCP-1) and adhesion molecules intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1), key mediators involved in enhancing endothelial cell-monocyte interaction. Furthermore, luteolin inhibited TNF-α-induced nuclear factor (NF)-κB transcriptional activity, IκBα degradation, expression of IκB kinase β and subsequent NF-κB p65 nuclear translocation in endothelial cells, suggesting that luteolin can inhibit inflammation by suppressing NF-κB signaling. In an animal study, C57BL/6 mice were fed a diet containing 0% or 0.6% luteolin for 3 weeks, and luteolin supplementation greatly suppressed TNF-α-induced increase in circulating levels of MCP-1/JE, CXCL1/KC and sICAM-1 in C57BL/6 mice. Consistently, dietary intake of luteolin significantly reduced TNF-α-stimulated adhesion of monocytes to aortic endothelial cells ex vivo. Histology shows that luteolin treatment prevented the eruption of endothelial lining in the intima layer of the aorta and preserved elastin fibers' delicate organization as shown by Verhoeff-Van Gieson staining. Immunohistochemistry studies further show that luteolin treatment also reduced VCAM-1 and monocyte-derived F4/80-positive macrophages in the aorta of TNF-α-treated mice. In conclusion, luteolin protects against TNF-α-induced vascular inflammation in both in vitro and in vivo models. This anti-inflammatory effect of luteolin may be mediated via inhibition of the NF-κB-mediated pathway.
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Affiliation(s)
- Zhenquan Jia
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412.
| | - Palanisamy Nallasamy
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Dongmin Liu
- Departments of Human Nutrition, Foods and Exercise, College of Agriculture and Life Sciences, Virginia Tech, Blacksburg, VA 24062, USA.
| | - Halley Shah
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Jason Z Li
- College and Graduate School of Arts & Sciences, University of Virginia, Charlottesville, VA 22904
| | - Rojin Chitrakar
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Hongwei Si
- Department of Family Consumer Sciences, College of Agriculture, Human and Natural Sciences, Tennessee State University, Nashville, TN 37209, USA
| | - John McCormick
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412
| | - Hong Zhu
- Department of Pharmacology, Campbell University, School of Osteopathic Medicine, Buies Creek, NC 27506, USA
| | - Wei Zhen
- Departments of Human Nutrition, Foods and Exercise, College of Agriculture and Life Sciences, Virginia Tech, Blacksburg, VA 24062, USA
| | - Yunbo Li
- Department of Biology, The University of North Carolina at Greensboro, Greensboro, NC 27412; Department of Pharmacology, Campbell University, School of Osteopathic Medicine, Buies Creek, NC 27506, USA.
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103
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Yousefi M, Namazi MR, Rahimi H, Younespour S, Ehsani AH, Shakoei S. Evaluation of Serum Homocysteine, High-Sensitivity CRP, and RBC Folate in Patients with Alopecia Areata. Indian J Dermatol 2014; 59:630. [PMID: 25484412 PMCID: PMC4248520 DOI: 10.4103/0019-5154.143567] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Introduction: Alopecia areata (AA) is a common type of hair loss with an autoimmune basis. As the role of homocysteine (Hcys), folate, and CRP has been considered in some autoimmune diseases. Objectives: To evaluate homocysteine, folate and CRP level in AA. Methods: This study was performed on 29 patients who had AA for at least 6 months affecting more than 20% of scalp, and 32 healthy controls. Levels of serum Hcys, blood high-sensitivity CRP, and RBC folate were measured in all subjects. Results: The mean level of RBC folate was significantly lower in the patient group than that in controls (P < 0.001). Also, the level of RBC folate was significantly lower in patients with extensive forms of disease (alopecia totalis/alopecia universalis) in comparison with more localized form (patchy hair loss) (P < 0.05). Patients with higher “Severity of Alopecia Total” (SALT) score had lower RBC folate, as well. Serum Hcys and blood high-sensitivity CRP levels did not show a significant difference in two groups. Conclusion: Patients with alopecia areata have lower level of RBC folate which is in negative correlation with both severity and extension of AA.
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Affiliation(s)
- Maryam Yousefi
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Hoda Rahimi
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shima Younespour
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir Houshang Ehsani
- Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Safoura Shakoei
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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104
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Debreceni B, Debreceni L. The role of homocysteine-lowering B-vitamins in the primary prevention of cardiovascular disease. Cardiovasc Ther 2014; 32:130-8. [PMID: 24571382 DOI: 10.1111/1755-5922.12064] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular disease (CVD) is the leading cause of mortality in the Western world. The effort of research should aim at the primary prevention of CVD. Alongside statin therapy, which is maintained to be an effective method of CVD prevention, there are alternative methods such as vitamin B substitution therapy with folic acid (FA), and vitamins B12 and B6 . B-vitamins may inhibit atherogenesis by decreasing the plasma level of homocysteine (Hcy)-a suspected etiological factor for atherosclerosis-and by other mechanisms, primarily through their antioxidant properties. Although Hcy-lowering vitamin trials have failed to demonstrate beneficial effects of B-vitamins in the prevention of CVD, a meta-analysis and stratification of a number of large vitamin trials have suggested their effectiveness in cardiovascular prevention (CVP) in some aspects. Furthermore, interpretation of the results from these large vitamin trials has been troubled by statin/aspirin therapy, which was applied along with the vitamin substitution, and FA fortification, both of which obscured the separate effects of vitamins in CVP. Recent research results have accentuated a new approach to vitamin therapy for CVP. Studies undertaken with the aim of primary prevention have shown that vitamin B substitution may be effective in the primary prevention of CVD and may also be an option in the secondary prevention of disease if statin therapy is accompanied by serious adverse effects. Further investigations are needed to determine the validity of vitamin substitution therapy before its introduction in the protocol of CVD prevention.
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Affiliation(s)
- Balazs Debreceni
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, Pecs, Hungary
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105
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Radenković M, Djurić D, Janković R, Prostran M. The analysis of transduction mechanisms associated with an acute action of homocysteine on isolated rat femoral artery. ACTA ACUST UNITED AC 2014; 101:448-60. [DOI: 10.1556/aphysiol.101.2014.4.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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106
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Wang Y, Shi S, Dong S, Wu J, Song M, Zhong X, Liu Y. Sodium hydrosulfide attenuates hyperhomocysteinemia rat myocardial injury through cardiac mitochondrial protection. Mol Cell Biochem 2014; 399:189-200. [DOI: 10.1007/s11010-014-2245-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Accepted: 10/09/2014] [Indexed: 01/11/2023]
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107
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Leach NV, Dronca E, Vesa SC, Sampelean DP, Craciun EC, Lupsor M, Crisan D, Tarau R, Rusu R, Para I, Grigorescu M. Serum homocysteine levels, oxidative stress and cardiovascular risk in non-alcoholic steatohepatitis. Eur J Intern Med 2014; 25:762-7. [PMID: 25262992 DOI: 10.1016/j.ejim.2014.09.007] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/09/2014] [Accepted: 09/08/2014] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Hyperhomocysteinemia is considered an independent risk factor for cardiovascular disease. Oxidative stress is one of the major pathogenic mechanisms in non-alcoholic fatty liver disease and atherosclerosis. AIM Our study aimed to evaluate serum homocysteine levels and oxidative stress in patients with biopsy-proven non-alcoholic steatohepatitis and possible association with cardiovascular risk measured by carotid artery intima-media thickness (c-IMT). PATIENTS AND METHODS 50 patients with non-alcoholic steatohepatitis and 30 healthy controls, age and gender matched, were recruited. Lipid profile, liver biochemical markers, serum homocysteine, vitamins B6 and B12, folic acid, glutathione (reduced and total), erythrocyte superoxide dismutase, whole blood glutathione peroxidase, malondialdehyde and carotid intima-media thickness were assayed. RESULTS Patients had an altered lipid profile and liver biochemical markers; carotid intima-media thickness and serum homocysteine levels were significantly higher compared to controls, but there were no differences in folate, B12 and B6 vitamins levels. Patients had significantly lower levels of glutathione peroxidase activity, total and reduced glutathione and higher levels of malondialdehyde, but unchanged superoxide dismutase activity compared to control group. Also, serum homocysteine level showed significant positive correlation with waist circumference, body mass index, free cholesterol, triglycerides, LDL-cholesterol, amino transferases and negative correlation with reduced and total glutathione, superoxide dismutase and γ-GT. CONCLUSION Non-alcoholic steatohepatitis is an independent cardiovascular risk factor, associated with elevated homocysteine levels, oxidative stress and c-IMT. c-IMT could be used as an indicator of early atherosclerotic changes initiated by dyslipidemia and oxidative stress, while higher level of homocysteine might be an effect of liver damage.
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Affiliation(s)
- Nicoleta V Leach
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Eleonora Dronca
- Department of Medical Genetics, Faculty of Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
| | - Stefan C Vesa
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Dorel P Sampelean
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Elena C Craciun
- Department of Pharmaceutical Biochemistry and Clinical Laboratory, Faculty of Pharmacy, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Monica Lupsor
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Dana Crisan
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Roxana Tarau
- Faculty of Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Razvan Rusu
- Department of Medical Biochemistry, Faculty of Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ioana Para
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Mircea Grigorescu
- 5th Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
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108
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Eren E, Ellidag HY, Aydin O, Yılmaz N. Homocysteine, Paraoxonase-1 and Vascular Endothelial Dysfunction: Omnibus viis Romam Pervenitur. J Clin Diagn Res 2014; 8:CE01-4. [PMID: 25386429 DOI: 10.7860/jcdr/2014/7827.4773] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 01/27/2014] [Indexed: 11/24/2022]
Abstract
Increased oxidative stress, alterations of lipid metabolism and induction of thrombosis have been suggested to be pathogenic links which are present between hyperhomocysteinaemia and atherosclerosis. However, the mechanism by which homocysteine (Hcy) can promote atherogenesis is far from clear and it has been debated. In the presence of cardiovascular risk factors, endothelial dysfunction is the central commodity which converges a plenty of factors, which have been named as atherogenic. Now-a-days, there are only few studies which have presented the correlation between antioxidant enzyme HDL-associated-paraoxonase 1(PON1) and Hcy in atherosclerosis. Both PON 1 and Hcy have been implicated in human diseases which are related to endothelial dysfunction. Although paraoxonases have the ability to hydrolyze a variety of substrates, only one of them, Hcy-thiolactone, is known to occur naturally. It seems very likely that the involvement of Hcy in atherosclerotic disease is mediated through its interactions with PON1.
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Affiliation(s)
- Esin Eren
- Laboratory of Atatürk Hospital , Antalya/Turkey
| | - Hamit Yasar Ellidag
- Central Laboratories of Antalya Education and Research Hospital of Ministry of Health , Antalya/Turkey
| | - Ozgur Aydin
- Laboratories of Batman Maternity and Children's Hospital , Antalya/Turkey
| | - Necat Yılmaz
- Central Laboratories of Antalya Education and Research Hospital of Ministry of Health , Antalya/Turkey
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109
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Abstract
Hydrogen sulfide (H2S) has emerged as a key regulator of cardiovascular function. This gasotransmitter is produced in the vasculature and is involved in numerous processes that promote vascular homeostasis, including vasodilation and endothelial cell proliferation. Although H2S plays a role under physiological conditions, it has become clear in recent years that hypoxia modulates the production and action of H2S. Furthermore, there is growing evidence that H2S is cytoprotective in the face of hypoxic insults. This review focuses on the synthesis and signaling of H2S in hypoxic conditions in the vasculature, and highlights recent studies providing evidence that H2S is a potential therapy for preventing tissue damage in hypoxic conditions.
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Affiliation(s)
- Jessica M Osmond
- Vascular Physiology Group, Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Nancy L Kanagy
- Vascular Physiology Group, Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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110
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Kolling J, Scherer EB, Siebert C, Marques EP, dos Santos TM, Wyse AT. Creatine prevents the imbalance of redox homeostasis caused by homocysteine in skeletal muscle of rats. Gene 2014; 545:72-9. [DOI: 10.1016/j.gene.2014.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 03/14/2014] [Accepted: 05/01/2014] [Indexed: 12/13/2022]
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111
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Homocysteine in renovascular complications: hydrogen sulfide is a modulator and plausible anaerobic ATP generator. Nitric Oxide 2014; 41:27-37. [PMID: 24963795 DOI: 10.1016/j.niox.2014.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 06/16/2014] [Accepted: 06/17/2014] [Indexed: 11/23/2022]
Abstract
Homocysteine (Hcy) is a non-protein amino acid derived from dietary methionine. High levels of Hcy, known as hyperhomocysteinemia (HHcy) is known to cause vascular complications. In the mammalian tissue, Hcy is metabolized by transsulfuration enzymes to produce hydrogen sulfide (H2S). H2S, a pungent smelling gas was previously known for its toxic effects in the central nervous system, recent studies however has revealed protective effects in a variety of diseases including hypertension, diabetes, inflammation, atherosclerosis, and renal disease progression and failure. Interestingly, under stress conditions including hypoxia, H2S can reduce metabolic demand and also act as a substrate for ATP production. This review highlights some of the recent advances in H2S research as a potential therapeutic agent targeting renovascular diseases associated with HHcy.
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112
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Deminice R, Rosa FT, da Silva LECM, Jordao AA. Taurine supplementation does not decrease homocysteine levels and liver injury induced by a choline-deficient diet. Life Sci 2014; 105:43-7. [PMID: 24769283 DOI: 10.1016/j.lfs.2014.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 03/20/2014] [Accepted: 04/11/2014] [Indexed: 10/25/2022]
Abstract
AIMS The aim of this study is to examine the effects of taurine supplementation on homocysteine (Hcy) metabolism and liver injury in rats fed a choline-deficient diet. MAIN METHODS Thirty rats were divided into three groups (n=10), to receive one of the following diets for 4 weeks: control diet (C), choline-deficient diet (CDD), or choline-deficient diet supplemented with taurine (CDDT). The CDD and the CDDT consisted of AIN-93 without the recommended choline content of 2.5%, and the CDDT was supplemented by the addition of 2.5% taurine. KEY FINDINGS Four weeks of ingesting a CDD resulted in a significant increase in plasma Hcy (50%) as well as a decrease in liver S-adenosylmethionine (SAM) concentration and S-adenosylmethionine/S-adenosylhomocysteine ratio. No changes were found in plasma methionine and cysteine plasma levels compared to control group. Four weeks of ingesting a CDD also caused a significant (P<0.05) increase in hepatic total fat, hepatic malondialdehyde (MDA), and plasma alanine aminotransferase (ALT) levels. In addition, reduced hepatic glutathione (GSH) levels and reduced/oxidized glutathione ratios (GSH/GSSG) were found in rats fed a CDD compared to controls. Taurine supplementation of the CDD normalized genes involved in the remethylation pathway, BHMT and CHDH, which were impaired by CDD alone. However, taurine supplementation failed to prevent CDD-induced Hcy metabolism disturbances and hepatic injury. Also, taurine added to CDD caused decreased expression of PEMT, CHKa, and CHKb, key genes involved in phosphatidylcholine (PC) synthesis and liver fat accumulation. SIGNIFICANCE Taurine supplementation failed to ameliorate impaired Hcy metabolism and liver injury caused by CDD intake.
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Affiliation(s)
- Rafael Deminice
- Laboratory of Nutrition and Metabolism, Faculty of Medicine of Ribeirao Preto, University of São Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, São Paulo, Brazil; Department of Physical Education, Faculty of Physical Education and Sport, State University of Londrina, Rodovia Celso Garcia Cid, Pr 445 Km 380, Campus Universitário, Londrina, Paraná, Brazil.
| | - Flávia Troncon Rosa
- Laboratory of Nutrition and Metabolism, Faculty of Medicine of Ribeirao Preto, University of São Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, São Paulo, Brazil
| | - Lilian Eslaine Costa Mendes da Silva
- Laboratory of Nutrition and Metabolism, Faculty of Medicine of Ribeirao Preto, University of São Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, São Paulo, Brazil
| | - Alceu Afonso Jordao
- Laboratory of Nutrition and Metabolism, Faculty of Medicine of Ribeirao Preto, University of São Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, São Paulo, Brazil
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113
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Shi YF, Chi JF, Tang WL, Xu FK, Liu LB, Ji Z, Lv HT, Guo HY. Effects of rosuvastatin on the production and activation of matrix metalloproteinase-2 and migration of cultured rat vascular smooth muscle cells induced by homocysteine. J Zhejiang Univ Sci B 2014; 14:696-704. [PMID: 23897788 DOI: 10.1631/jzus.bqicc703] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To test the influence of homocysteine on the production and activation of matrix metalloproteinase-2 (MMP-2) and tissue inhibitors of matrix metalloproteinase-2 (TIMP-2) and on cell migration of cultured rat vascular smooth muscle cells (VSMCs). Also, to explore whether rosuvastatin can alter the abnormal secretion and activation of MMP-2 and TIMP-2 and migration of VSMCs induced by homocysteine. METHODS Rat VSMCs were incubated with different concentrations of homocysteine (50-5000 μmol/L). Western blotting and gelatin zymography were used to investigate the expressions and activities of MMP-2 and TIMP-2 in VSMCs in culture medium when induced with homocysteine for 24, 48, and 72 h. Transwell chambers were employed to test the migratory ability of VSMCs when incubated with homocysteine for 48 h. Different concentrations of rosuvastatin (10(-9)-10(-5) mol/L) were added when VSMCs were induced with 1000 μmol/L homocysteine. The expressions and activities of MMP-2 and TIMP-2 were examined after incubating for 24, 48, and 72 h, and the migration of VSMCs was also examined after incubating for 48 h. RESULTS Homocysteine (50-1000 μmol/L) increased the production and activation of MMP-2 and expression of TIMP-2 in a dose-dependent manner. However, when incubated with 5000 μmol/L homocysteine, the expression of MMP-2 was up-regulated, but its activity was down-regulated. Increased homocysteine-induced production and activation of MMP-2 were reduced by rosuvastatin in a dose-dependent manner whereas secretion of TIMP-2 was not significantly altered by rosuvastatin. Homocysteine (50-5000 μmol/L) stimulated the migration of VSMCs in a dose-dependent manner, but this effect was eliminated by rosuvastatin. CONCLUSIONS Homocysteine (50-1000 μmol/L) significantly increased the production and activation of MMP-2, the expression of TIMP-2, and the migration of VSMCs in a dose-dependent manner. Additional extracellular rosuvastatin can decrease the excessive expression and activation of MMP-2 and abnormal migration of VSMCs induced by homocysteine.
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Affiliation(s)
- Ya-fei Shi
- Department of Cardiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, China
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114
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Hornstra JM, Hoekstra T, Serné EH, Eringa EC, Wijnstok NJ, Blom HJ, Twisk JWR, Smulders YM. Homocysteine levels are inversely associated with capillary density in men, not in premenopausal women. Eur J Clin Invest 2014; 44:333-40. [PMID: 24422875 DOI: 10.1111/eci.12240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 01/07/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND Homocysteine is an independent predictor of cardiovascular risk. The mechanisms underlying this link are not fully elucidated. Whereas the role of vascular dysfunction in conduit arteries is extensively studied, the role of the microcirculation in this relationship is largely unexplored. We assessed the relationship between homocysteine levels and microvascular structure and function in a healthy, population-based cohort. MATERIALS AND METHODS We cross-sectionally studied 260 participants (aged 42 years, 47% men) of the Amsterdam Growth and Health Longitudinal Study. Nailfold videocapillaroscopy was used to assess capillary density at baseline, during venous occlusion and during peak reactive hyperaemia. The relationship between tertiles of homocysteine and microvascular outcomes was evaluated using linear regression analyses, with adjustment for BMI and blood pressure. Stratified analyses were performed for men and women. RESULTS In men, we observed a negative, nonlinear relationship between homocysteine and baseline capillary density, showing a lower capillary density in the highest tertile of homocysteine [adjusted B -8.65 capillaries/mm(2) (95%-CI: -16.05 to -1.25); P = 0.02]. In women, no significant associations were found between homocysteine and microvascular outcomes. CONCLUSIONS In men, higher homocysteine levels are associated with a reduction in basal perfusion of skin capillaries. This finding provides a novel potential explanation for how homocysteine influences cardiovascular disease risk.
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Affiliation(s)
- Jacqueline M Hornstra
- Department of Internal and Vascular Medicine, Institute for Cardiovascular Research (IcaR-VU), VU University Medical Centre, Amsterdam, the Netherlands
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115
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Deminice R, Rosa FT, Franco GS, da Cunha SFC, de Freitas EC, Jordao AA. Short-term creatine supplementation does not reduce increased homocysteine concentration induced by acute exercise in humans. Eur J Nutr 2013; 53:1355-61. [DOI: 10.1007/s00394-013-0636-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 11/27/2013] [Indexed: 02/02/2023]
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116
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Association between polymorphism of MTHFR c.677C>T and risk of cardiovascular disease in Turkish population: a meta-analysis for 2.780 cases and 3.022 controls. Mol Biol Rep 2013; 41:397-409. [PMID: 24264431 DOI: 10.1007/s11033-013-2873-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Accepted: 11/14/2013] [Indexed: 10/26/2022]
Abstract
Cardiovascular diseases (CVDs) remain the main cause of morbidity and mortality around the world. A common polymorphism c.677C>T has been identified in the gene coding for methylenetetrahydrofolate reductase (MTHFR), which is involved in the remethylation of homocysteine, and may predispose to CVDs. A meta-analysis was performed to estimate the risk of CVDs associated with MTHFR c.677C>T in Turkish population. Published studies were retrieved from PubMed, Science Citation Index/Expanded, Google Scholar, Turkish Medline, and the Turkish Council of Higher Education Theses Database. For each study, we calculated odds ratios and 95 % confidence intervals (CI), assuming frequency of allele and homozygote comparison, dominant and recessive genetic models. Thirty-one separate studies were included and 2.780 cases/3.022 controls were involved in the current meta-analysis. Significant association was found between c.677C>T polymorphism and risk of CVD when all studies pooled with random-effects model for T versus C (OR 1.33; 95 % CI 1.11-1.59; p = 0.002), TT vs. CC (OR 1.87; 95 % CI 1.35-2.60; p = 3.53E-04), TT+CT vs. CC (OR 1.32; 95 % CI 1.06-1.64; p = 0.014) and TT vs. CT+CC (OR 1.75; 95 % CI 1.29-2.37; p = 6.57E-04). Further analysis indicated the significant association between methylenetetrahydrofolate reductase (MTHFR) TT genotype and groups with venous thrombosis, peripheral arterial thrombosis, acute MI/MI. No publication bias was observed in any comparison model. Our results of meta-analysis suggest that MTHFR c.677C>T polymorphism is associated with the CVDs in Turkish population.
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Mendes RH, Mostarda C, Candido GO, Moraes-Silva IC, D'Almeida V, Belló-Klein A, Irigoyen MC, Rigatto K. Moderate hyperhomocysteinemia provokes dysfunction of cardiovascular autonomic system and liver oxidative stress in rats. Auton Neurosci 2013; 180:43-7. [PMID: 24231341 DOI: 10.1016/j.autneu.2013.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 10/14/2013] [Accepted: 10/17/2013] [Indexed: 10/26/2022]
Abstract
Hyperhomocysteinemia (HHcy) is associated with cardiovascular disease, atherosclerosis and reactive oxygen species generation. Thus, our aim was to investigate whether there was an association between HHcy, blood pressure, autonomic control and liver oxidative stress. Male Wistar rats were divided into 2 groups and treated for 8weeks: one group (control, CO) received tap water, while the other group (methionine, ME) was given a 100mg/kg of methionine in water by gavage. Two catheters were implanted into the femoral artery and vein to record arterial pressure (AP) and heart rate (HR) and drug administration. Signals were recorded by a data acquisition system. Baroreflex sensitivity was evaluated by HR responses to AP changes induced by vasoactive drugs. HR variability and AP variability were performed by spectral analysis in time and frequency domains to evaluate the contribution of the sympathetic and parasympathetic modulation. Lipid peroxidation and antioxidant enzyme activities were evaluated by measuring superoxide dismutase, catalase and glutathione peroxidase in liver homogenates. The ME group presented a significant increase in systolic arterial pressure (118±9 vs 135±6mmHg), diastolic arterial pressure (81±6 vs. 92±4) and mean arterial pressure (95±7 vs. 106±6). In addition, pulse interval variability presented a significant decrease (41%), while the low frequency component of AP was significantly increased (delta P=6.24mmHg(2)) in the ME group. We also found a positive association between lipid peroxidation and cardiac sympathetic modulation, sympathetic and vagal modulation ratio and systolic pressure variability. Collectively, these findings showed that HHcy induced dysfunction of cardiovascular autonomic system and liver oxidative stress.
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Affiliation(s)
- R H Mendes
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil; Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Brazil
| | - C Mostarda
- Hospital Materno Infantil, Universidade Federal do Maranhão, Brazil; Unidade de Hipertensão, Instituto do Coração, Universidade de São Paulo, Brazil
| | - G O Candido
- Unidade de Hipertensão, Instituto do Coração, Universidade de São Paulo, Brazil
| | - I C Moraes-Silva
- Unidade de Hipertensão, Instituto do Coração, Universidade de São Paulo, Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Santo Amaro, Brazil
| | - V D'Almeida
- Departamento de Biociências, UNIFESP, SP, Brazil
| | - A Belló-Klein
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil
| | - M C Irigoyen
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil; Unidade de Hipertensão, Instituto do Coração, Universidade de São Paulo, Brazil
| | - K Rigatto
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil; Universidade Federal de Ciências da Saúde de Porto Alegre, Brazil.
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118
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Plasma homocysteine levels in HIV-infected men with and without lipodystrophy. Nutrition 2013; 29:1326-30. [PMID: 24045000 DOI: 10.1016/j.nut.2013.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 04/25/2013] [Accepted: 04/25/2013] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Lipodystrophy syndrome is an unexpected clinical manifestation in patients infected with HIV and might be a clinical marker of increased risk for cardiovascular diseases (CVDs). Because hyperhomocysteinemia has been associated with CVD, the goal of the present study was to investigate homocysteine (Hcy) levels and their association with the factors of lipodystrophy syndrome in men with HIV. METHODS Hcy metabolism-related molecules were determined in 13 men infected with HIV with lipodystrophy (HIV+LIP), 10 men with HIV without lipodystrophy (HIV), and 10 healthy controls (C). RESULTS Significant (P < 0.05) increased Hcy plasma levels were found in HIV (20.5%) and in HIV+LIP (35.2%) compared with the control group. Plasma levels of vitamin B12 (HIV, 26.5%; HIV+LIP, 28.8%) and folate (HIV, 39.1% and HIV+LIP, 49.4%) were significantly (P < 0.05) lower in the two groups of HIV patients compared with control. HIV+LIP men presented raised plasma total sulfur-containing amino acids (20.1%) and lower total plasma thiol (11.3%) than controls. The same was not observed in the HIV group. Spearman's correlation test revealed significant (P < 0.05) association between plasma Hcy and duration of highly active antiretroviral therapy (HAART) and plasma insulin, as well as plasma adiponectin levels. CONCLUSION Our results demonstrated that HIV+LIP men were more susceptible to disturbances in Hcy metabolism compared with men infected with HIV without lipodystrophy characteristics. Duration of HAART treatment, elevated plasma insulin, and low levels of adiponectin seem to be relevant for the appearance of these Hcy metabolic disorders.
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119
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[Alterations in the protein content and dysfunction of high-density lipoproteins from hyperhomocysteinemic mice]. CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS 2013; 25:164-73. [PMID: 23938051 DOI: 10.1016/j.arteri.2013.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 07/05/2013] [Indexed: 11/21/2022]
Abstract
AIM The aim of this study was to evaluate the proteic changes in high-density lipoproteins (HDL) induced by methionine-induced hyperhomocysteinemia in mice and its relationship with two of their main antiatherogenic properties. METHODS AND RESULTS The oral administration of methionine resulted in an elevation (~8 times) in the plasma concentration of homocysteine. Hyperhomocysteinemia was inversely correlated with the plasma concentration of HDL cholesterol and its main protein component of HDL, apolipoprotein (apo) A-I, respectively. The cholesterol efflux in vivo from macrophages to HDL was decreased in hyperhomocysteinemic mice compared with the control mice. However, the reverse cholesterol transport from macrophages to feces remained unchanged. On the other hand, the ability of HDL from hyperhomocysteinemic mice to prevent the oxidative modification of low-density lipoproteins (LDL) was found decreased and associated with a concomitant reduction in the plasma activity of paraoxonase-1 (PON1) and the plasma concentration of apoA-I, and with a relative reduction in the apoA-IV content (~1.5 times) in the hyperhomocysteinemic HDL, respectively. CONCLUSION The decrease in the ability of HDL from hyperhomocysteinemic mice to prevent LDL from oxidation was associated with a decrease in the apoA-I, PON1 and apoA-IV.
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120
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Veeranki S, Tyagi SC. Defective homocysteine metabolism: potential implications for skeletal muscle malfunction. Int J Mol Sci 2013; 14:15074-91. [PMID: 23873298 PMCID: PMC3742288 DOI: 10.3390/ijms140715074] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 06/24/2013] [Accepted: 07/11/2013] [Indexed: 12/13/2022] Open
Abstract
Hyperhomocysteinemia (HHcy) is a systemic medical condition and has been attributed to multi-organ pathologies. Genetic, nutritional, hormonal, age and gender differences are involved in abnormal homocysteine (Hcy) metabolism that produces HHcy. Homocysteine is an intermediate for many key processes such as cellular methylation and cellular antioxidant potential and imbalances in Hcy production and/or catabolism impacts gene expression and cell signaling including GPCR signaling. Furthermore, HHcy might damage the vagus nerve and superior cervical ganglion and affects various GPCR functions; therefore it can impair both the parasympathetic and sympathetic regulation in the blood vessels of skeletal muscle and affect long-term muscle function. Understanding cellular targets of Hcy during HHcy in different contexts and its role either as a primary risk factor or as an aggravator of certain disease conditions would provide better interventions. In this review we have provided recent Hcy mediated mechanistic insights into different diseases and presented potential implications in the context of reduced muscle function and integrity. Overall, the impact of HHcy in various skeletal muscle malfunctions is underappreciated; future studies in this area will provide deeper insights and improve our understanding of the association between HHcy and diminished physical function.
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Affiliation(s)
- Sudhakar Veeranki
- Authors to whom correspondence should be addressed; E-Mails: (S.V.); (S.C.T.); Tel.: +1-973-610-1160 (S.V.); +1-502-852-3381 (S.C.T.); Fax: +1-502-852-6239 (S.C.T.)
| | - Suresh C. Tyagi
- Authors to whom correspondence should be addressed; E-Mails: (S.V.); (S.C.T.); Tel.: +1-973-610-1160 (S.V.); +1-502-852-3381 (S.C.T.); Fax: +1-502-852-6239 (S.C.T.)
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Matrix metalloproteinases: inflammatory regulators of cell behaviors in vascular formation and remodeling. Mediators Inflamm 2013; 2013:928315. [PMID: 23840100 PMCID: PMC3694547 DOI: 10.1155/2013/928315] [Citation(s) in RCA: 279] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 05/15/2013] [Indexed: 12/21/2022] Open
Abstract
Abnormal angiogenesis and vascular remodeling contribute to pathogenesis of a number of disorders such as tumor, arthritis, atherosclerosis, restenosis, hypertension, and neurodegeneration. During angiogenesis and vascular remodeling, behaviors of stem/progenitor cells, endothelial cells (ECs), and vascular smooth muscle cells (VSMCs) and its interaction with extracellular matrix (ECM) play a critical role in the processes. Matrix metalloproteinases (MMPs), well-known inflammatory mediators are a family of zinc-dependent proteolytic enzymes that degrade various components of ECM and non-ECM molecules mediating tissue remodeling in both physiological and pathological processes. MMPs including MMP-1, MMP-2, MMP-3, MMP-7, MMP-8, MMP-9, MMP-12, and MT1-MMP, are stimulated and activated by various stimuli in vascular tissues. Once activated, MMPs degrade ECM proteins or other related signal molecules to promote recruitment of stem/progenitor cells and facilitate migration and invasion of ECs and VSMCs. Moreover, vascular cell proliferation and apoptosis can also be regulated by MMPs via proteolytically cleaving and modulating bioactive molecules and relevant signaling pathways. Regarding the importance of vascular cells in abnormal angiogenesis and vascular remodeling, regulation of vascular cell behaviors through modulating expression and activation of MMPs shows therapeutic potential.
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Julve J, Escolà-Gil JC, Rodríguez-Millán E, Martín-Campos JM, Jauhiainen M, Quesada H, Rentería-Obregón IM, Osada J, Sánchez-Quesada JL, Blanco-Vaca F. Methionine-induced hyperhomocysteinemia impairs the antioxidant ability of high-density lipoproteins without reducing in vivo macrophage-specific reverse cholesterol transport. Mol Nutr Food Res 2013; 57:1814-24. [DOI: 10.1002/mnfr.201300133] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/26/2013] [Accepted: 03/31/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Josep Julve
- Institut d'Investigacions Biomèdiques Sant Pau (IIB-Sant Pau); Barcelona Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas; CIBERDEM Spain
| | - Joan C. Escolà-Gil
- Institut d'Investigacions Biomèdiques Sant Pau (IIB-Sant Pau); Barcelona Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas; CIBERDEM Spain
| | | | - Jesús M. Martín-Campos
- Institut d'Investigacions Biomèdiques Sant Pau (IIB-Sant Pau); Barcelona Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas; CIBERDEM Spain
| | - Matti Jauhiainen
- National Institute for Health and Welfare, Public Health Genomics Unit; Biomedicum Helsinki Finland
| | - Helena Quesada
- Institut d'Investigacions Biomèdiques Sant Pau (IIB-Sant Pau); Barcelona Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas; CIBERDEM Spain
| | | | - Jesús Osada
- CIBER de Fisiopatología de la Obesidad y Nutrición; Instituto de Salud Carlos III; Madrid Spain
- Departamento de Bioquímica y Biología Molecular y Celular; Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón, Universidad de Zaragoza; Zaragoza Spain
| | | | - Francisco Blanco-Vaca
- Institut d'Investigacions Biomèdiques Sant Pau (IIB-Sant Pau); Barcelona Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas; CIBERDEM Spain
- Departament de Bioquímica i Biologia Molecular; Universitat Autònoma de Barcelona; Barcelona Spain
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Abstract
Sulfur is the seventh most abundant element measurable in the human body and is supplied mainly by the intake of methionine (Met), an indispensable amino acid found in plant and animal proteins. Met controls the initiation of protein synthesis, governs major metabolic and catalytic activities, and may undergo reversible redox processes safeguarding protein integrity. Withdrawal of Met from customary diets causes the greatest downsizing of lean body mass following either unachieved replenishment (malnutrition) or excessive losses (inflammation). These physiopathologically unrelated morbidities nevertheless stimulate comparable remethylation reactions from homocysteine, indicating that Met homeostasis benefits from high metabolic priority. Inhibition of cystathionine-β-synthase activity causes the upstream sequestration of homocysteine and the downstream drop in cysteine and glutathione. Consequently, the enzymatic production of hydrogen sulfide and the nonenzymatic reduction of elemental sulfur to hydrogen sulfide are impaired. Sulfur operates as cofactor of several enzymes critically involved in the regulation of oxidative processes. A combination of malnutrition and nutritional deprivation of sulfur maximizes the risk of cardiovascular disorders and stroke, constituting a novel clinical entity that threatens plant-eating population groups.
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Affiliation(s)
- Yves Ingenbleek
- Laboratory of Nutrition, Faculty of Pharmacy, University Louis Pasteur, Strasbourg, France.
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Ruddy JM, Jones JA, Ikonomidis JS. Pathophysiology of thoracic aortic aneurysm (TAA): is it not one uniform aorta? Role of embryologic origin. Prog Cardiovasc Dis 2013; 56:68-73. [PMID: 23993239 DOI: 10.1016/j.pcad.2013.04.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Thoracic aortic aneurysm (TAA) is a clinically silent and potentially fatal disease whose pathophysiology is poorly understood. Application of data derived from animal models and human tissue analysis of abdominal aortic aneurysms may prove misleading given current evidence of structural and biochemical aortic heterogeneity above and below the diaphragm. Genetic predisposition is more common in TAA and includes multi-faceted syndromes such as Marfan, Loeys-Dietz, and type IV Ehlers-Danlos as well as autosomal-dominant familial patterns of inheritance. Investigation into the consequences of these known mutations has provided insight into the cell signaling cascades leading to degenerative remodeling of the aortic medial extracellular matrix (ECM) with TGF-β playing a major role. Targeted research into modifying the upstream regulation or downstream effects of the TGF-β1 pathway may provide opportunities for intervention to attenuate TAA progression.
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Affiliation(s)
- Jean Marie Ruddy
- Division of Cardiothoracic Surgery, Department of Surgery, Medical University of South Carolina, Charlston, SC, USA
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125
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Lee YS, Lee SJ, Seo KW, Bae JU, Park SY, Kim CD. Homocysteine induces COX-2 expression in macrophages through ROS generated by NMDA receptor-calcium signaling pathways. Free Radic Res 2013; 47:422-31. [PMID: 23485152 DOI: 10.3109/10715762.2013.784965] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Homocysteine (Hcy) at elevated levels is a putative risk factor for many cardiovascular disorders including atherosclerosis. In the present study, we investigated the effect of Hcy on the expression of cyclooxygenase (COX)-2 in murine macrophages and the mechanisms involved. Hcy increased the expression of COX-2 mRNA and protein in dose- and time-dependent manners, but did not affect COX-1 expression. Hcy-induced COX-2 expression was attenuated not only by the calcium chelators, EGTA and BAPTA-AM, but also by an antioxidant, N-acetylcysteine. Calcium chelators also attenuated Hcy-induced reactive oxygen species (ROS) production in macrophages, indicating that Hcy-induced COX-2 expression might be mediated through ROS generated by calcium-dependent signaling pathways. In another series of experiments, Hcy increased the intracellular concentration of calcium in a dose-dependent manner, which was attenuated by MK-801, an N-methyl-D-aspartate (NMDA) receptor inhibitor, but not by bicuculline, a gamma-aminobutyric acid receptor inhibitor. Molecular inhibition of NMDA receptor using small interfering RNA also attenuated Hcy-induced increases in intracellular calcium. Furthermore, both ROS production and Hcy-induced COX-2 expression were also inhibited by MK-801 as well as by molecular inhibition of NMDA receptor. Taken together, these findings suggest that Hcy enhances COX-2 expression in murine macrophages by ROS generated via NMDA receptor-mediated calcium signaling pathways.
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Affiliation(s)
- Y S Lee
- Department of Pharmacology, School of Medicine, Pusan National University, Yangsan, Gyeongnam, Korea
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126
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Smith DE, Hornstra JM, Kok RM, Blom HJ, Smulders YM. Folic acid supplementation does not reduce intracellular homocysteine, and may disturb intracellular one-carbon metabolism. Clin Chem Lab Med 2013; 51:1643-50. [DOI: 10.1515/cclm-2012-0694] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 12/25/2012] [Indexed: 11/15/2022]
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Hwang JY, Jung CH, Lee MJ, Kang YM, Lee WJ, Park JY. Association of Plasma Homocysteine Level and Arterial Stiffness in Subjects with Type 2 Diabetes Mellitus. J Lipid Atheroscler 2013. [DOI: 10.12997/jla.2013.2.1.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
| | - Chang Hee Jung
- Department of Endocrinology and Metabolism, University of Ulsan, School of Medicine, Asan Medical Center, Seoul, Korea
| | - Min Jung Lee
- Department of Endocrinology and Metabolism, University of Ulsan, School of Medicine, Asan Medical Center, Seoul, Korea
| | - Yu Mi Kang
- Department of Endocrinology and Metabolism, University of Ulsan, School of Medicine, Asan Medical Center, Seoul, Korea
| | - Woo-Je Lee
- Department of Endocrinology and Metabolism, University of Ulsan, School of Medicine, Asan Medical Center, Seoul, Korea
| | - Joong-Yeol Park
- Department of Endocrinology and Metabolism, University of Ulsan, School of Medicine, Asan Medical Center, Seoul, Korea
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Ortiz TT, Terreri MT, Caetano M, Souza FS, D'Almeida V, Sarni ROS, Hilário MOE. Dyslipidemia in Pediatric Systemic Lupus Erythematosus: The Relationship with Disease Activity and Plasma Homocysteine and Cysteine Concentrations. ANNALS OF NUTRITION AND METABOLISM 2013; 63:77-82. [DOI: 10.1159/000351076] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 03/31/2013] [Indexed: 11/19/2022]
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129
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Mao GX, Cao YB, Lan XG, He ZH, Chen ZM, Wang YZ, Hu XL, Lv YD, Wang GF, Yan J. Therapeutic effect of forest bathing on human hypertension in the elderly. J Cardiol 2012; 60:495-502. [DOI: 10.1016/j.jjcc.2012.08.003] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 07/06/2012] [Accepted: 08/09/2012] [Indexed: 12/27/2022]
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130
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Kim JB, Deluna A, Mungrue IN, Vu C, Pouldar D, Civelek M, Orozco L, Wu J, Wang X, Charugundla S, Castellani LW, Rusek M, Jakubowski H, Jakobowski H, Lusis AJ. Effect of 9p21.3 coronary artery disease locus neighboring genes on atherosclerosis in mice. Circulation 2012; 126:1896-906. [PMID: 22952318 DOI: 10.1161/circulationaha.111.064881] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND The human 9p21.3 chromosome locus has been shown to be an independent risk factor for atherosclerosis in multiple large-scale genome-wide association studies, but the underlying mechanism remains unknown. We set out to investigate the potential role of the 9p21.3 locus neighboring genes, including Mtap, the 2 isoforms of Cdkn2a, p16Ink4a and p19Arf, and Cdkn2b, in atherosclerosis using knockout mice models. METHODS AND RESULTS Gene-targeted mice for neighboring genes, including Mtap, Cdkn2a, p19Arf, and Cdkn2b, were each bred to mice carrying the human APO*E3 Leiden transgene that sensitizes the mice for atherosclerotic lesions through elevated plasma cholesterol. We found that the mice heterozygous for Mtap developed larger lesions compared with wild-type mice (49623±21650 versus 18899±9604 μm(2) per section [mean±SD]; P=0.01), with morphology similar to that of wild-type mice. The Mtap heterozygous mice demonstrated changes in metabolic and methylation profiles and CD4(+) cell counts. The Cdkn2a knockout mice had smaller lesions compared with wild-type and heterozygous mice, and there were no significant differences in lesion size in p19Arf and Cdkn2b mutants compared with wild type. We observed extensive, tissue-specific compensatory regulation of the Cdkn2a and Cdkn2b genes among the various knockout mice, making the effects on atherosclerosis difficult to interpret. CONCLUSIONS Mtap plays a protective role against atherosclerosis, whereas Cdkn2a appears to be modestly proatherogenic. However, no relation was found between the 9p21 genotype and the transcription of 9p21 neighboring genes in primary human aortic vascular cells in vitro. There is extensive compensatory regulation in the highly conserved 9p21 orthologous region in mice.
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Affiliation(s)
- Juyong Brian Kim
- Division of Cardiology, Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1679, USA
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Yuan D, He P. Vascular remodeling alters adhesion protein and cytoskeleton reactions to inflammatory stimuli resulting in enhanced permeability increases in rat venules. J Appl Physiol (1985) 2012; 113:1110-20. [PMID: 22837164 DOI: 10.1152/japplphysiol.00102.2012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Vascular remodeling has been implicated in many inflammation-involved diseases. This study aims to investigate the microvascular remodeling-associated alterations in cell-cell adhesion and cytoskeleton reactions to inflammatory stimuli and their impact on microvessel permeability. Experiments were conducted in individually perfused rat mesenteric venules. Microvessel permeability was determined by measuring hydraulic conductivity (Lp), and endothelial intracellular calcium concentration, [Ca(2+)](i), was measured in fura-2-perfused vessels. Alterations in VE-cadherin and F-actin arrangement were examined by confocal imaging. Vascular wall cellular composition and structural changes were evaluated by electron microscopy. Vessels exposed to platelet activating factor (PAF) on day 1 were reevaluated 3 days later in rats that had undergone survival surgery. Initial PAF exposure and surgical disturbance increased microvascular wall thickness along with perivascular cell proliferation and altered F-actin arrangement. Although basal permeability was not changed, upon reexposure to PAF, peak endothelial [Ca(2+)](i) was augmented and the peak Lp was 9.3 ± 1.7 times higher than that of day 1. In contrast to patterns of PAF-induced stress fiber formation and VE-cadherin redistribution observed in day 1 vessels, the day 4 vessels at the potentiated Lp peak exhibited wide separations of VE-cadherin between endothelial cells and striking stress fibers throughout the vascular walls. Confocal images and ultrastructural micrographs also revealed that the largely separated VE-cadherin and endothelial gaps were completely covered by F-actin bundles in extended pericyte processes at the PAF-induced Lp peak. These results indicate that inflammation-induced vascular remodeling increased endothelial susceptibility to inflammatory stimuli with augmented Ca(2+) response resulting in upregulated contractility and potentiated permeability increase. Weakened adhesions between the endothelial cells and contractile mechanisms are both involved in increasing permeability in the intact microvessels and are aggravated during remodeling. The perivascular cells play important roles in stabilizing the microvessel wall, while lessening an otherwise much greater magnitude of leakage during cytoskeletal contraction.
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Affiliation(s)
- Dong Yuan
- Department of Physiology and Pharmacology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
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Oliveira KC, Verreschi ITN, Sugawara EK, Silva VC, Galera BB, Galera MF, Bianco B, Lipay MVN. C677T and A1298C polymorphisms of MTHFR gene and their relation to homocysteine levels in Turner syndrome. Genet Test Mol Biomarkers 2012; 16:396-400. [PMID: 22283972 PMCID: PMC3354587 DOI: 10.1089/gtmb.2011.0222] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AIMS To determine the frequency of C677T and A1298C polymorphisms of the MTHFR gene and correlate them with homocysteine serum levels in patients with Turner syndrome (TS) and controls. METHODS This case-control study included 78 women with TS and a control group of 372 healthy individuals without personal or family history of cardiovascular disease and cancer. C677T (rs1801133) and A1298C (rs1801131) polymorphisms were detected by polymerase chain reaction-restriction fragment-length polymorphism and the TaqMan system, respectively. Homocysteine serum levels were determined by high-performance liquid chromatography. The results were analyzed statistically, and p<0.05 was considered to represent a significant difference. RESULTS The homocysteine levels change was 13.9+3.3 nM in patients with TS and 8.8+3.2 nM in the control group. No significant difference between groups was found (p=0.348). Single-marker analysis revealed no association between MTHFR C677T polymorphism and TS when genotype (p=0.063) or allelic (p=0.277) distribution was considered. Regarding MTHFR A1298C polymorphism, a statistical difference was found between the TS group and the control group, for both genotype (p<0.0001) and allele (p<0.0001) distribution. Haplotype analysis of 2 MTHFR polymorphisms identified 2 haplotypes-CC and TC-associated with TS (p<0.001 and p=0.0165, respectively). However, homocysteine levels were not higher in patients with haplotype risk. CONCLUSION The results suggest that the C677T and A1298C polymorphisms of the MTHFR gene are not related to homocysteine levels in Brazilian patients with TS, despite the differential distribution of the mutated allele C (A1298C) in these patients. Further studies are needed to investigate the possible genetic interaction with homocysteine levels in TS.
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Affiliation(s)
- Kelly C Oliveira
- Division of Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil
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Maulik N, Sanchez JA. Risk factors in heart disease: therapeutic interventions. Antioxid Redox Signal 2011; 15:1765-7. [PMID: 21395498 PMCID: PMC3159102 DOI: 10.1089/ars.2011.3981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Nilanjana Maulik
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington, Connecticut
| | - Juan A. Sanchez
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington, Connecticut
- Department of Surgery, Saint Mary's Hospital, Waterbury, Connecticut
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