The Effects of Diabetes Induction on the Rat Heart: Differences in Oxidative Stress, Inflammatory Cells, and Fibrosis between Subendocardial and Interstitial Myocardial Areas

Diabetic cardiomyopathy (DCM) is characterized by cardiac remodeling and impaired diastolic function that may lead to heart failure. The aim of this study was to evaluate oxidative stress, inflammatory cells, and fibrosis in both subendocardial (SEN) and interstitial (INT) areas of the myocardium. M...

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Veröffentlicht in:Oxidative medicine and cellular longevity 2017-01, Vol.2017 (2017), p.1-11
Hauptverfasser: Salemi, Vera M. C., Tavares de Melo, Marcelo D., Tavares, Elaine R., Marques, Alyne F., Guido, Maria C., Maranhão, Raul Cavalcante
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container_end_page 11
container_issue 2017
container_start_page 1
container_title Oxidative medicine and cellular longevity
container_volume 2017
creator Salemi, Vera M. C.
Tavares de Melo, Marcelo D.
Tavares, Elaine R.
Marques, Alyne F.
Guido, Maria C.
Maranhão, Raul Cavalcante
description Diabetic cardiomyopathy (DCM) is characterized by cardiac remodeling and impaired diastolic function that may lead to heart failure. The aim of this study was to evaluate oxidative stress, inflammatory cells, and fibrosis in both subendocardial (SEN) and interstitial (INT) areas of the myocardium. Male Wistar rats were allocated to 2 groups of 9 animals, a control (CT) group and streptozotocin-induced diabetes (DM). After 8 weeks, echocardiography morphometry, protein expression, and confocal microscopy in SEN and INT areas of the left ventricle (LV) were performed. The echocardiographic analysis showed that diabetes induction leads to cardiac dilation, hypertrophy, and LV diastolic dysfunction. As compared to CT, the induction of diabetes increased inflammatory cells and fibrosis in both SEN and INT areas of DM myocardium and increased ROS generation only in SEN. Comparing the SEN and INT areas in the DM group, inflammatory cells and fibrosis in SEN were greater than in INT. In conclusion, diabetic myocardium SEN area, wherein oxidative stress was more pronounced, is more susceptible to cardiac dysfunction than INT area. This finding can be important for the understanding of the heart remodeling process occurring in DCM and perhaps to engender targeted therapies to attenuate or revert DCM-related diastolic dysfunction.
doi_str_mv 10.1155/2017/5343972
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C. ; Tavares de Melo, Marcelo D. ; Tavares, Elaine R. ; Marques, Alyne F. ; Guido, Maria C. ; Maranhão, Raul Cavalcante</creator><contributor>Sobenin, Igor A.</contributor><creatorcontrib>Salemi, Vera M. C. ; Tavares de Melo, Marcelo D. ; Tavares, Elaine R. ; Marques, Alyne F. ; Guido, Maria C. ; Maranhão, Raul Cavalcante ; Sobenin, Igor A.</creatorcontrib><description>Diabetic cardiomyopathy (DCM) is characterized by cardiac remodeling and impaired diastolic function that may lead to heart failure. The aim of this study was to evaluate oxidative stress, inflammatory cells, and fibrosis in both subendocardial (SEN) and interstitial (INT) areas of the myocardium. Male Wistar rats were allocated to 2 groups of 9 animals, a control (CT) group and streptozotocin-induced diabetes (DM). After 8 weeks, echocardiography morphometry, protein expression, and confocal microscopy in SEN and INT areas of the left ventricle (LV) were performed. 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C.</au><au>Tavares de Melo, Marcelo D.</au><au>Tavares, Elaine R.</au><au>Marques, Alyne F.</au><au>Guido, Maria C.</au><au>Maranhão, Raul Cavalcante</au><au>Sobenin, Igor A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Effects of Diabetes Induction on the Rat Heart: Differences in Oxidative Stress, Inflammatory Cells, and Fibrosis between Subendocardial and Interstitial Myocardial Areas</atitle><jtitle>Oxidative medicine and cellular longevity</jtitle><addtitle>Oxid Med Cell Longev</addtitle><date>2017-01-01</date><risdate>2017</risdate><volume>2017</volume><issue>2017</issue><spage>1</spage><epage>11</epage><pages>1-11</pages><issn>1942-0900</issn><eissn>1942-0994</eissn><abstract>Diabetic cardiomyopathy (DCM) is characterized by cardiac remodeling and impaired diastolic function that may lead to heart failure. The aim of this study was to evaluate oxidative stress, inflammatory cells, and fibrosis in both subendocardial (SEN) and interstitial (INT) areas of the myocardium. Male Wistar rats were allocated to 2 groups of 9 animals, a control (CT) group and streptozotocin-induced diabetes (DM). After 8 weeks, echocardiography morphometry, protein expression, and confocal microscopy in SEN and INT areas of the left ventricle (LV) were performed. The echocardiographic analysis showed that diabetes induction leads to cardiac dilation, hypertrophy, and LV diastolic dysfunction. As compared to CT, the induction of diabetes increased inflammatory cells and fibrosis in both SEN and INT areas of DM myocardium and increased ROS generation only in SEN. Comparing the SEN and INT areas in the DM group, inflammatory cells and fibrosis in SEN were greater than in INT. In conclusion, diabetic myocardium SEN area, wherein oxidative stress was more pronounced, is more susceptible to cardiac dysfunction than INT area. This finding can be important for the understanding of the heart remodeling process occurring in DCM and perhaps to engender targeted therapies to attenuate or revert DCM-related diastolic dysfunction.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><pmid>28781721</pmid><doi>10.1155/2017/5343972</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-1520-4914</orcidid><oa>free_for_read</oa></addata></record>
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subjects Animals
Blotting, Western
Cardiomyopathy
Collagen
Cytokines
Diabetes
Diabetes Mellitus - immunology
Diabetes Mellitus - metabolism
Diabetes Mellitus - pathology
Diabetes Mellitus, Experimental - immunology
Diabetes Mellitus, Experimental - metabolism
Diabetes Mellitus, Experimental - pathology
Diabetic Cardiomyopathies - immunology
Diabetic Cardiomyopathies - metabolism
Echocardiography
Fibrosis
Gangrene
Health aspects
Heart - physiology
Heart failure
Heart muscle
Inflammation
Insulin
Male
Medical research
Myocardium - immunology
Myocardium - metabolism
Myocardium - pathology
Oxidative stress
Oxidative Stress - physiology
Rats
Rats, Wistar
Reactive Oxygen Species - metabolism
Rodents
Streptozocin
Studies
Tumor necrosis factor-TNF
Ventricular Dysfunction, Left - immunology
Ventricular Dysfunction, Left - metabolism
Ventricular Dysfunction, Left - pathology
title The Effects of Diabetes Induction on the Rat Heart: Differences in Oxidative Stress, Inflammatory Cells, and Fibrosis between Subendocardial and Interstitial Myocardial Areas
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