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Zhou X, Zhang L, Lin X, Chen X, Liu H, Yuan X, Zhao Q, Wang W, Lei X, Jose PA, Deng C, Yang J. Thrombospondin 2 is a novel biomarker of essential hypertension and associated with nocturnal Na + excretion and insulin resistance. Clin Exp Hypertens 2023; 45:2276029. [PMID: 37943619 DOI: 10.1080/10641963.2023.2276029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/17/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Thrombospondins (TSPs) play important roles in several cardiovascular diseases. However, the association between circulating (plasma) thrombospondin 2 (TSP2) and essential hypertension remains unclear. The present study was aimed to investigate the association of circulating TSP2 with blood pressure and nocturnal urine Na+ excretion and evaluate the predictive value of circulating TSP2 in subjects with hypertension. METHODS AND RESULTS 603 newly diagnosed essential hypertensive subjects and 508 healthy subjects were preliminarily screened, 47 healthy subjects and 40 newly diagnosed essential hypertensive subjects without any chronic diseases were recruited. The results showed that the levels of circulating TSP2 were elevated in essential hypertensive subjects. The levels of TSP2 positively associated with systolic blood pressure (SBP), diastolic blood pressure (DBP), and other clinical parameters, including homeostasis model assessment of insulin resistance (HOMA-IR), brachial-ankle pulse wave velocity, and serum triglycerides, but negatively associated with nocturnal urine Na+ concentration and excretion and high-density lipoprotein cholesterol. Results of multiple linear regressions showed that HOMA-IR and nocturnal Na+ excretion were independent factors related to circulating TSP2. Mantel-Haenszel chi-square test displayed linear relationships between TSP2 and SBP (χ2 = 35.737) and DBP (χ2 = 26.652). The area under receiver operating characteristic curve (AUROC) of hypertension prediction was 0.901. CONCLUSION Our study suggests for the first time that the circulating levels of TSP2 may be a novel potential biomarker for essential hypertension. The association between TSP2 and blood pressure may be, at least in part, related to the regulation of renal Na+ excretion, insulin resistance, and/or endothelial function.
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Affiliation(s)
- Xiaoxin Zhou
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Longlong Zhang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoqian Lin
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xi Chen
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hong Liu
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoli Yuan
- Health Management Center, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qiuxia Zhao
- Health Management Center, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiwei Wang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xun Lei
- Research Center for Medicine and Social Development, Collaborative Innovation Center of Social Risks Governance in Health, School of Public Health, Chongqing Medical University, Chongqing, China
| | - Pedro A Jose
- Division of Renal Diseases & Hypertension, Department of Medicine and Department of Physiology and Pharmacology, The George Washington University School of Medicine & Health Sciences, New York, WA, USA
| | - Chunyan Deng
- Department of Neurology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jian Yang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Free fatty acids stabilize integrin β 1via S-nitrosylation to promote monocyte-endothelial adhesion. J Biol Chem 2022; 299:102765. [PMID: 36470423 PMCID: PMC9808002 DOI: 10.1016/j.jbc.2022.102765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 12/09/2022] Open
Abstract
Hyperlipidemia characterized by high blood levels of free fatty acids (FFAs) is important for the progression of inflammatory cardiovascular diseases. Integrin β1 is a transmembrane receptor that drives various cellular functions, including differentiation, migration, and phagocytosis. However, the underlying mechanisms modifying integrin β1 protein and activity in mediating monocyte/macrophage adhesion to endothelium remain poorly understood. In this study, we demonstrated that integrin β1 protein underwent S-nitrosylation in response to nitrosative stress in macrophages. To examine the effect of elevated levels of FFA on the modulation of integrin β1 expression, we treated the macrophages with a combination of oleic acid and palmitic acid (2:1) and found that FFA activated inducible nitric oxide synthase/nitric oxide and increased the integrin β1 protein level without altering the mRNA level. FFA promoted integrin β1 S-nitrosylation via inducible nitric oxide synthase/nitric oxide and prevented its degradation by decreasing binding to E3 ubiquitin ligase c-Cbl. Furthermore, we found that increased integrin α4β1 heterodimerization resulted in monocyte/macrophage adhesion to endothelium. In conclusion, these results provided novel evidence that FFA-stimulated N--O stabilizes integrin β1via S-nitrosylation, favoring integrin α4β1 ligation to promote vascular inflammation.
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Lopes PDD, de Assis N, de Araújo NF, Moreno OLM, Jorge KTDOS, E Castor MGM, Teixeira MM, Soriani FM, Capettini LDSA, Bonaventura D, Cau SBDA. COX/iNOS dependence for angiotensin-II-induced endothelial dysfunction. Peptides 2022; 157:170863. [PMID: 36028074 DOI: 10.1016/j.peptides.2022.170863] [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: 02/19/2022] [Revised: 08/19/2022] [Accepted: 08/20/2022] [Indexed: 10/31/2022]
Abstract
Vascular dysfunction induced by angiotensin-II can result from direct effects on vascular and inflammatory cells and indirect hemodynamic effects. Using isolated and functional cultured aortas, we aimed to identify the effects of angiotensin-II on cyclooxygenase (COX) and inducible nitric oxide synthase (iNOS) and evaluate their impact on vascular reactivity. Aortic rings from mice were incubated overnight in culture medium containing angiotensin-II (100 nmol/L) or vehicle to induce vascular disfunction. Vascular reactivity of cultured arteries was evaluated in a bath chamber. Immunofluorescence staining for COX-1 and COX-2 was performed. Nitric oxide (NO) formation was approached by the levels of nitrite, a NO end product, and using a fluorescent probe (DAF). Oxidative and nitrosative stress were determined by DHE fluorescence and nitrotyrosine staining, respectively. Arteries cultured with angiotensin-II showed impairment of endothelium-dependent relaxation, which was reversed by the AT1 receptor antagonist. Inhibition of COX and iNOS restored vascular relaxation, suggesting a common pathway in which angiotensin-II triggers COX and iNOS, leading to vasoconstrictor receptors activation. Moreover, using selective antagonists, TP and EP were identified as the receptors involved in this response. Endothelium-dependent contractions of angiotensin-II-cultured aortas were blunted by ibuprofen, and increased COX-2 immunostaining was found in the arteries, indicating endothelium release of vasoconstrictor prostanoids. Angiotensin-II induced increased reactive oxygen species and NO production. An iNOS inhibitor prevented NO enhancement and nitrotyrosine accumulation in arteries stimulated with angiotensin-II. These results confirm that angiotensin-II causes vascular inflammation that culminates in endothelial dysfunction in an iNOS and COX codependent manner.
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Affiliation(s)
- Patrícia das Dores Lopes
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | - Naiara de Assis
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | - Natália Ferreira de Araújo
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | - Olga Lúcia Maquilon Moreno
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | | | | | - Mauro Martins Teixeira
- Department of Biochemistry & Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | - Frederico Marianetti Soriani
- Department of Genetics, Ecology & Evolution, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | | | - Daniella Bonaventura
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil
| | - Stefany Bruno de Assis Cau
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, MG, Brazil.
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Belenichev IF, Abramov AV, Puzyrenko A, Bukhtiyarova NV, Gorchakova NO, Bak PG. Molecular mechanisms of myocardial damage in the hypertensive rats and hypertensive rats with metabolic disorders (diabetes mellitus, atherosclerosis). RESEARCH RESULTS IN PHARMACOLOGY 2022. [DOI: 10.3897/rrpharmacology.8.78534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023] Open
Abstract
Introduction: Despite the success which was achieved in the treatment of arterial hypertension, for optimization of the treatment, it is necessary to study the pathogenesis of primary arterial hypertension and target organ damage on the molecular level.
Materials and methods: Our team studied the molecular mechanisms of myocardial damage during arterial hypertension and metabolic disorders. We used the spontaneously hypertensive rats (SHR) as an experimental model, and, additionally, we modeled diabetes mellitus and atherosclerosis in these rats.
Results and discussion: Our study obtained evidence of a much higher level of the energy imbalance in the cardiomyocytes and more intensive production of reactive oxygen species in the SHRs with diabetes mellitus and atherosclerosis compared with the healthy animals and the animals with only hypertension. The indicated defections create an environment for further cellular damage – mitochondrial dysfunction, depletion in the thiol-disulfide system, and formation of highly reactive NO products. At the same time, we have noticed a higher activity of the Hsp70 in the hypertensive groups compared with the normotensive animals. The source of these deviations is in the formation of mitochondrial dysfunction of cardiocytes, the cause of which is oxidative modification of the protein structures of mitochondria under conditions of activation of oxidative stress reactions, insufficiency of mPT pores, and impaired mitochondrial chaperone function. The presented data give reason to believe that mitochondrial dysfunction, which develops against the background of deficient HSP70, is an integral aspect of arterial hypertension, contributes to its aggravation, and triggers a cascade of molecular and biochemical mechanisms of myocardial damage. These mechanisms include disturbances in the L-arginine-NO-synthase-NO system, production of mitochondrial iNOS oxygen radicals, neutralization of the vasorelaxant effect of NO and its transformation into an active participant in nitrous stress due to reduced intermediates of the thiol-disulfide system. The question of cause-and-effect relationships of oxidative stress remains open for discussion.
Conclusion: We envisage that studies in this direction may lead to a better insight into a pathogenetic therapy of essential hypertension, diabetes mellitus, and atherosclerosis.
Graphical abstract:
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Huo S, Shi W, Ma H, Yan D, Luo P, Guo J, Li C, Lin J, Zhang C, Li S, Lv J, Lin L. Alleviation of Inflammation and Oxidative Stress in Pressure Overload-Induced Cardiac Remodeling and Heart Failure via IL-6/STAT3 Inhibition by Raloxifene. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6699054. [PMID: 33824698 PMCID: PMC8007383 DOI: 10.1155/2021/6699054] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/07/2021] [Accepted: 02/13/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Inflammation and oxidative stress are involved in the initiation and progress of heart failure (HF). However, the role of the IL6/STAT3 pathway in the pressure overload-induced HF remains controversial. METHODS AND RESULTS Transverse aortic constriction (TAC) was used to induce pressure overload-HF in C57BL/6J mice. 18 mice were randomized into three groups (Sham, TAC, and TAC+raloxifene, n = 6, respectively). Echocardiographic and histological results showed that cardiac hypertrophy, fibrosis, and left ventricular dysfunction were manifested in mice after TAC treatment of eight weeks, with aggravation of macrophage infiltration and interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) expression in the myocardium. TAC (four and eight weeks) elevated the phosphorylation of signal transducer and activator of transcription 3 (p-STAT3) and prohibitin2 (PHB2) protein expression. Importantly, IL-6/gp130/STAT3 inhibition by raloxifene alleviated TAC-induced myocardial inflammation, cardiac remodeling, and dysfunction. In vitro, we demonstrated cellular hypertrophy with STAT3 activation and oxidative stress exacerbation could be elicited by IL-6 (25 ng/mL, 48 h) in H9c2 myoblasts. Sustained IL-6 stimulation increased intracellular reactive oxygen species, repressed mitochondrial membrane potential (MMP), decreased intracellular content of ATP, and led to decreased SOD activity, an increase in iNOS protein expression, and increased protein expression of Pink1, Parkin, and Bnip3 involving in mitophagy, all of which were reversed by raloxifene. CONCLUSION Inflammation and IL-6/STAT3 signaling were activated in TAC-induced HF in mice, while sustained IL-6 incubation elicited oxidative stress and mitophagy-related protein increase in H9c2 myoblasts, all of which were inhibited by raloxifene. These indicated IL-6/STAT3 signaling might be involved in the pathogenesis of myocardial hypertrophy and HF.
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Affiliation(s)
- Shengqi Huo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Shi
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haiyan Ma
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Division of Cardiology, Department of Internal Medicine, First People's Hospital of Shangqiu, Shangqiu, China
| | - Dan Yan
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pengcheng Luo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junyi Guo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chenglong Li
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville FL, USA
| | - Jiayuh Lin
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore MD, USA
| | - Cuntai Zhang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiagao Lv
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Lin
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Pechanova O, Vrankova S, Cebova M. Chronic L-Name-Treatment Produces Hypertension by Different Mechanisms in Peripheral Tissues and Brain: Role of Central eNOS. PATHOPHYSIOLOGY 2020; 27:46-54. [PMID: 35366256 PMCID: PMC8830472 DOI: 10.3390/pathophysiology27010007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/11/2020] [Accepted: 12/11/2020] [Indexed: 12/17/2022] Open
Abstract
The goal of our study was to analyze the time course of the effect of NG-nitro-L-arginine methyl ester (L-NAME) on nitric oxide synthase (NOS) isoforms and nuclear factor–κB (NF-κB) protein expression, total NOS activity, and blood pressure (BP) in rats. Adult 12-week-old male Wistar rats were subjected to treatment with L-NAME (40 mg/kg/day) for four and seven weeks. BP was increased after 4- and 7-week L-NAME treatments. NOS activity decreased after 4-week-L-NAME treatment; however, the 7-week treatment increased NOS activity in the aorta, heart, and kidney, while it markedly decreased NOS activity in the brainstem, cerebellum, and brain cortex. The 4-week-L-NAME treatment increased eNOS expression in the aorta, heart, and kidney and this increase was amplified after 7 weeks of treatment. In the brain regions, eNOS expression remained unchanged after 4-week L-NAME treatment and prolonged treatment led to a significant decrease of eNOS expression in these tissues. NF-κB expression increased in both peripheral and brain tissues after 4 weeks of treatment and prolongation of treatment decreased the expression in the aorta, heart, and kidney. In conclusion, decreased expression of eNOS in the brain regions after 7-week L-NAME treatment may be responsible for a remarkable decrease of NOS activity in these regions. Since the BP increase persisted after 7 weeks of L-NAME treatment, we hypothesize that central regulation of BP may contribute significantly to L-NAME-induced hypertension.
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How Periodontal Disease and Presence of Nitric Oxide Reducing Oral Bacteria Can Affect Blood Pressure. Int J Mol Sci 2020; 21:ijms21207538. [PMID: 33066082 PMCID: PMC7589924 DOI: 10.3390/ijms21207538] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/06/2020] [Accepted: 10/09/2020] [Indexed: 02/07/2023] Open
Abstract
Nitric oxide (NO), a small gaseous and multifunctional signaling molecule, is involved in the maintenance of metabolic and cardiovascular homeostasis. It is endogenously produced in the vascular endothelium by specific enzymes known as NO synthases (NOSs). Subsequently, NO is readily oxidized to nitrite and nitrate. Nitrite is also derived from exogenous inorganic nitrate (NO3) contained in meat, vegetables, and drinking water, resulting in greater plasma NO2 concentration and major reduction in systemic blood pressure (BP). The recycling process of nitrate and nitrite to NO (nitrate-nitrite-NO pathway), known as the enterosalivary cycle of nitrate, is dependent upon oral commensal nitrate-reducing bacteria of the dorsal tongue. Veillonella, Actinomyces, Haemophilus, and Neisseria are the most copious among the nitrate-reducing bacteria. The use of chlorhexidine mouthwashes and tongue cleaning can mitigate the bacterial nitrate-related BP lowering effects. Imbalances in the oral reducing microbiota have been associated with a decrease of NO, promoting endothelial dysfunction, and increased cardiovascular risk. Although there is a relationship between periodontitis and hypertension (HT), the correlation between nitrate-reducing bacteria and HT has been poorly studied. Restoring the oral flora and NO activity by probiotics may be considered a potential therapeutic strategy to treat HT.
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Saheera S, Krishnamurthy P. Cardiovascular Changes Associated with Hypertensive Heart Disease and Aging. Cell Transplant 2020; 29:963689720920830. [PMID: 32393064 PMCID: PMC7586256 DOI: 10.1177/0963689720920830] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cardiovascular diseases are the leading cause of mortality and morbidity worldwide and account for more than 17.9 million deaths (World Health Organization report). Hypertension and aging are two major risk factors for the development of cardiac structural and functional abnormalities. Hypertension, or elevated blood pressure, if left untreated can result in myocardial hypertrophy leading to heart failure (HF). Left ventricular hypertrophy consequent to pressure overload is recognized as the most important predictor of congestive HF and sudden death. The pathological changes occurring during hypertensive heart disease are very complex and involve many cellular and molecular alterations. In contrast, the cardiac changes that occur with aging are a slow but life-long process and involve all of the structural components in the heart and vasculature. However, these structural changes in the cardiovascular system lead to alterations in overall cardiac physiology and function. The pace at which these pathophysiological changes occur varies between individuals owing to many genetic and environmental risk factors. This review highlights the molecular mechanisms of cardiac structural and functional alterations associated with hypertension and aging.
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Affiliation(s)
- Sherin Saheera
- Department of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, USA
| | - Prasanna Krishnamurthy
- Department of Biomedical Engineering, School of Medicine and School of Engineering, The University of Alabama at Birmingham, USA
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