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Increased Myocardial Retention of Mesenchymal Stem Cells Post-MI by Pre-Conditioning Exercise Training. Stem Cell Rev Rep 2021; 16:730-741. [PMID: 32306279 DOI: 10.1007/s12015-020-09970-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Stem cell (SC) therapy is a promising approach to improve post-myocardial infarction (MI) cardiac remodeling, but the proinflammatory microenvironment may lead to SC loss and, therefore, may have a negative impact on therapy. It appears that exercise training (ET) improves myocardial microenvironment for SC transplantation. Therefore, we tested the effect of ET on post-infarction retention of adipose-derived SCs (ADSCs) and its combined effects on the inflammatory microenvironment. Fischer-344 female rats were randomized to one of the following groups: Sham; sedentary coronary occlusion who did not receive ADSCs (sMI); sedentary coronary occlusion who received ADSCs; exercise coronary occlusion who received ADSCs. Rats were trained nine weeks prior to MI, followed by ADSCs transplantation. The MI led to left ventricle (LV) dilation and dysfunction, myocardial hypertrophy and fibrosis, and increased proinflammatory profile compared to Sham rats. Conversely, ADSCs transplanted rats exhibited, better morphological and functional LV parameters; inhibition of myocardial hypertrophy and fibrosis; and attenuation of proinflammatory cytokines (interleukins 1β and 10, tumor necrosis factor α, and transforming growth factor β) in the myocardium compared to sMI rats. Interestingly, ET enhanced the effect of ADSCs on interleukin 10 expression. There was a correlation between cytokine expression and myocardial ADSCs retention. The. ET enhanced the beneficial effects of ADSCs in infarcted myocardium, which was associated with higher ADSCs retention. These findings highlight the importance of ET in myocardial retention of ADSCs and attenuation of cardiac remodeling post-infarction. Cytokine analysis suggests improvement in ET-linked myocardial microenvironment based on its anti-inflammatory action.
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Feliciano RDS, Atum ALB, Ruiz ÉGDS, Serra AJ, Antônio EL, Manchini MT, Silva JMA, Tucci PJF, Nathanson L, Morris M, Chavantes MC, Silva Júnior JA. Photobiomodulation Therapy on Myocardial Infarction in Rats: Transcriptional and Posttranscriptional Implications to Cardiac Remodeling. Lasers Surg Med 2021; 53:1247-1257. [PMID: 33846991 DOI: 10.1002/lsm.23407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/15/2021] [Accepted: 03/22/2021] [Indexed: 01/29/2023]
Abstract
BACKGROUND AND OBJECTIVES Induction of myocardial infarction (MI) in rats by occlusion of the left anterior descending coronary artery is an experimental model used in research to elucidate functional, structural, and molecular modifications associated with ischemic heart disease. Photobiomodulation therapy (PBMT) has become a therapeutic alternative by modulating various biological processes eliciting several effects, including anti-inflammatory and pro-proliferative actions. The main objective of this work was to evaluate the effect of PBMT in the modulation of transcriptional and post-transcriptional changes that occurred in myocardium signal transduction pathways after MI. STUDY DESIGN/MATERIALS AND METHODS Continuous wave (CW) non-thermal laser parameters were: 660 nm wavelength, power 15 mW, with a total energy of 0.9 J, fluence of 1.15 J/cm2 , spot size of 0.785 cm2 , and time of 60 seconds. Using in silico analysis, we selected and then, quantified the expression of messenger RNA (mRNA) of 47 genes of 9 signaling pathways associated with MI (angiogenesis, cell survival, hypertrophy, oxidative stress, apoptosis, extracellular matrix, calcium kinetics, cell metabolism, and inflammation). Messenger RNA expression quantification was performed in myocardial samples by polymerase chain reaction real-time array using TaqMan customized plates. RESULTS Our results evidenced that MI modified mRNA expression of several well-known biomarkers related to detrimental cardiac activity in almost all signaling pathways analyzed. However, PBMT reverted most of these transcriptional changes. More expressively, PBMT provoked a robust decrease in mRNA expression of molecules that participate in post-MI inflammation and ECM composition, such as IL-6, TNF receptor, TGFb1, and collagen I and III. Global microRNA (miRNA) expression analysis revealed that PBMT decreased miR-221, miR-34c, and miR-93 expressions post-MI, which are related to deleterious effects in cardiac remodeling. CONCLUSION Thus, the identification of transcriptional and post-transcriptional changes induced by PBMT may be used to interfere in the molecular dynamics of cardiac remodeling post-MI.
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Affiliation(s)
| | | | | | - Andrey Jorge Serra
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | - Ednei Luiz Antônio
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | | | | | - Paulo José Ferreira Tucci
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | - Lubov Nathanson
- Nova Southeastern University, 3301 College Avenue, Fort Lauderdale, Florida, 33314
| | - Mariana Morris
- Nova Southeastern University, 3301 College Avenue, Fort Lauderdale, Florida, 33314
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Veiga ECA, Antônio EL, Santos AA, Lemes B, Bocalini DS, Picollo C, Levy RF, Martins FL, Girardi ACC, Serra AJ, Tucci PJF. Delayed Reperfusion-Coronary Artery Reperfusion Close to Complete Myocardial Necrosis Benefits Remote Myocardium and Is Enhanced by Exercise. Front Physiol 2019; 10:157. [PMID: 30899225 PMCID: PMC6416202 DOI: 10.3389/fphys.2019.00157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/08/2019] [Indexed: 11/13/2022] Open
Abstract
The present study aimed to analyze the effects of reperfusion of a distant coronary artery on cardiac function, the ultrastructure, and the molecular environment of the remote myocardium immediately after the completion of myocardial regional necrosis: delayed reperfusion (DR). Additionally, the effects of prior exercise on the outcomes of DR were investigated. Female rats with permanent occlusion or delayed reperfusion were randomly assigned to an exercise (swimming, 1 h/day, 5 days/week for 8 weeks) or sedentary protocol. Thus, the study included the following four groups: sedentary permanent occlusion, exercise permanent occlusion, sedentary delayed reperfusion, and exercise delayed reperfusion. The descending coronary artery was occluded for 1 h. Reperfusion was confirmed by contrast echocardiography, and the rats were observed for 4 weeks. Permanent occlusion and DR caused similar myocardial infarction sizes among the four groups. Interestingly, exercise significantly decreased the mortality rate. Delayed reperfusion resulted in significant benefits, including enhanced hemodynamics and papillary muscle contraction, as well as reduced apoptosis and collagen content. Protein calcium kinetics did not change. Meanwhile, developed tension and the Frank–Starling mechanism were enhanced, suggesting that calcium sensitivity was intensified in myofilaments. Remarkable remote myocardial benefits occurred after distant DR, and prior exercise intensified cardiac recovery. Our findings provide valuable information about DR. Our data might explain the better clinical outcomes in recent studies showing that late reperfusion could improve heart failure in patients with myocardial infarction. In conclusion, DR has remote myocardial benefits, including inotropism enhancement, pulmonary congestion reduction, and collagen and apoptosis attenuation, which are enhanced by prior exercise.
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Affiliation(s)
- Eduardo C A Veiga
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Ednei L Antônio
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Alexandra A Santos
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Brunno Lemes
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Danilo S Bocalini
- Center of physical education and sports, Federal University of Espírito Santo, Vitória, Brazil
| | - Camila Picollo
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Rosely F Levy
- Department of Physiology, Federal University of Paraíba, Paraíba, Brazil
| | - Flavia L Martins
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Adriana Castello Costa Girardi
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Andrey J Serra
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Paulo J F Tucci
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
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de Souza Vieira S, Antonio EL, de Melo BL, Portes LA, Montemor J, Oliveira HA, Martins FL, Zogbi C, Girardi AC, Silva JA, Camillo de Carvalho PDT, Tucci PJF, Serra AJ. Exercise Training Potentiates The Cardioprotective Effects of Stem Cells Post-infarction. Heart Lung Circ 2019; 28:263-271. [PMID: 29503239 DOI: 10.1016/j.hlc.2017.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 11/06/2017] [Accepted: 11/10/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND Preconditioning of cell recipients may exert a significant role in attenuating the hostility of the infarction milieu, thereby enhancing the efficacy of cell therapy. This study was conducted to examine whether exercise training potentiates the cardioprotective effects of adipose-derived stem cell (ADSC) transplantation following myocardial infarction (MI) in rats. METHODS Four groups of female Fisher-344 rats were studied: Sham; non-trained rats with MI (sMI); non-trained rats with MI submitted to ADSCs transplantation (sADSC); trained rats with MI submitted to ADSCs (tADSC). Rats were trained 9 weeks prior to MI and ADSCs transplantation. Echocardiography was applied to assess cardiac function. Myocardial performance was evaluated in vitro. Protein expression analyses were carried out by immunoblotting. Periodic acid-Schiff staining was used to analyse capillary density and apoptosis was evaluated with terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL) assay. RESULTS Echocardiography performed 4 weeks after the infarction revealed attenuated scar size in the both sADSC and tADSC groups compared to the sMI group. However, fractional shortening was improved only in the tADSC group. In vitro myocardial performance was similar between the tADSC and Sham groups. The expression of phosphoSer473Akt1 and VEGF were found to be higher in the hearts of the tADSC group compared to both the sADSC and sMI groups. Histologic analysis demonstrated that tADSC rats had higher capillary density in the remote and border zones of the infarcted sites compared to the sMI rats. CONCLUSIONS Preconditioning with exercise induces a pro-angiogenic milieu that may potentiate the therapeutic effects of ADSCs on cardiac remodelling following MI.
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Affiliation(s)
| | | | | | - Leslie Andrews Portes
- Cardiology Division, Federal University of São Paulo, São Paulo, Brazil; Adventist Center University of São Paulo, São Paulo, Brazil
| | - Jairo Montemor
- Cardiology Division, Federal University of São Paulo, São Paulo, Brazil
| | | | - Flavia Leticia Martins
- Laboratory of Genetic and Molecular Cardiology, Heart Institute (InCor), University of São Paulo, São Paulo, Brazil
| | - Camila Zogbi
- Laboratory of Genetic and Molecular Cardiology, Heart Institute (InCor), University of São Paulo, São Paulo, Brazil
| | - Adriana Costa Girardi
- Laboratory of Genetic and Molecular Cardiology, Heart Institute (InCor), University of São Paulo, São Paulo, Brazil
| | - José Antônio Silva
- Laboratory of Biophotonic, Universidade Nove de Julho, São Paulo, Brazil
| | | | | | - Andrey Jorge Serra
- Cardiology Division, Federal University of São Paulo, São Paulo, Brazil; Laboratory of Biophotonic, Universidade Nove de Julho, São Paulo, Brazil.
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Role of low-level laser therapy on the cardiac remodeling after myocardial infarction: A systematic review of experimental studies. Life Sci 2016; 151:109-114. [DOI: 10.1016/j.lfs.2016.02.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 02/15/2016] [Indexed: 11/18/2022]
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Serra AJ, Tucci PJF. How should experimental myocardial infarction size be reported? Int J Cardiol 2016; 214:189-90. [PMID: 27064639 DOI: 10.1016/j.ijcard.2016.03.151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 03/19/2016] [Indexed: 10/22/2022]
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Antonio EL, Serra AJ, dos Santos AA, Vieira SS, Silva JMA, Yoshizaki A, Sofia RR, Tucci PJF. Are there gender differences in left ventricular remodeling after myocardial infarction in rats? REVISTA BRASILEIRA DE CIRURGIA CARDIOVASCULAR : ORGAO OFICIAL DA SOCIEDADE BRASILEIRA DE CIRURGIA CARDIOVASCULAR 2015; 30:70-6. [PMID: 25859870 PMCID: PMC4389530 DOI: 10.5935/1678-741.20140093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 06/02/2014] [Indexed: 11/21/2022]
Abstract
Objective An unclear issue is whether gender may influence at cardiac remodeling after
myocardial infarction (MI). We evaluated left ventricle remodeling in female
and male rats post-MI. Methods Rats were submitted to anterior descending coronary occlusion.
Echocardiographic evaluations were performed on the first and sixth week
post-occlusion to determine myocardial infarction size and left ventricle
systolic function (FAC, fractional area change). Pulsed Doppler was applied
to analyze left ventricle diastolic function using the following parameters:
E wave, A wave, E/A ratio. Two-way ANOVA was applied for comparisons,
complemented by the Bonferroni test. A P≤=0.05 was
considered significant. Results There were no significant differences between genders for morphometric
parameters on first (MI [Female (FE): 44.0±5.0 vs. Male (MA): 42.0±3.0%];
diastolic [FE: 0.04±0.003 vs. MA: 0.037±0.005, mm/g] and systolic [FE:
0.03±0.0004 vs. MA: 0.028±0.005, mm/g] diameters of left ventricle) and
sixth (MI [FE: 44.0±5.0 vs. MA: 42.0±3.0, %]; diastolic [FE: 0.043±0.01 vs.
MA: 0.034±0.005, mm/g] and systolic [FE: 0.035±0.01 vs. MA: 0.027±0.005,
mm/g] of LV) week. Similar findings were reported for left ventricle
functional parameters on first (FAC [FE: 34.0±6.0 vs. MA: 32.0±4.0, %]; wave
E [FE: 70.0±18.0 vs. MA: 73.0±14.0, cm/s]; wave A [FE: 20.0±12.0 vs. MA:
28.0±13.0, cm/s]; E/A [FE: 4.9±3.4 vs. MA: 3.3±1.8]) and sixth (FAC [FE:
29.0±7.0 vs. MA: 31.0±7.0, %]; wave E [FE: 85.0±18.0 vs. MA: 87.0±20.0,
cm/s]; wave A [FE: 20.0±11.0 vs. MA: 28.0±17.0, cm/s]; E/A [FE: 6.2±4.0 vs.
MA: 4.6±3.4]) week. Conclusion Gender does not influence left ventricle remodeling post-MI in rats.
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Affiliation(s)
- Ednei Luiz Antonio
- Laboratório de Fisiologia e Fisiopatologia Cardíacas, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | | | | | - Stella Sousa Vieira
- Laboratório de Fisiologia e Fisiopatologia Cardíacas, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | | | - Amanda Yoshizaki
- Programa de Pós-graduação em Ciências da Reabilitação, Universidade Nove de Julho, São Paulo, SP, Brazil
| | | | - Paulo José Ferreira Tucci
- Laboratório de Fisiologia e Fisiopatologia Cardíacas, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Sofia RR, Serra AJ, Silva JA, Antonio EL, Manchini MT, Oliveira FAAD, Teixeira VPC, Tucci PJF. Gender-based differences in cardiac remodeling and ILK expression after myocardial infarction. Arq Bras Cardiol 2014; 103:124-30. [PMID: 25098374 PMCID: PMC4150663 DOI: 10.5935/abc.20140113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 01/17/2014] [Indexed: 01/13/2023] Open
Abstract
Background Gender can influence post-infarction cardiac remodeling. Objective To evaluate whether gender influences left ventricular (LV) remodeling and
integrin-linked kinase (ILK) after myocardial infarction (MI). Methods Female and male Wistar rats were assigned to one of three groups: sham, moderate
MI (size: 20-39% of LV area), and large MI (size: ≥40% of LV area). MI was
induced by coronary occlusion, and echocardiographic analysis was performed after
six weeks to evaluate MI size as well as LV morphology and function. Real-time
RT-PCR and Western blot were used to quantify ILK in the myocardium. Results MI size was similar between genders. MI resulted in systolic dysfunction and
enlargement of end-diastolic as well as end-systolic dimension of LV as a function
of necrotic area size in both genders. Female rats with large MI showed a lower
diastolic and systolic dilatation than the respective male rats; however, LV
dysfunction was similar between genders. Gene and protein levels of ILK were
increased in female rats with moderate and large infarctions, but only male rats
with large infarctions showed an altered ILK mRNA level. A negative linear
correlation was evident between LV dimensions and ILK expression in female rats
with large MI. Conclusions Post-MI ILK expression is altered in a gender-specific manner, and higher ILK
levels found in females may be sufficient to improve LV geometry but not LV
function.
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Affiliation(s)
- Renato Rodrigues Sofia
- Programa de Pós-graduação em Ciências da Reabilitação, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Andrey Jorge Serra
- Programa de Pós-graduação em Ciências da Reabilitação, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Jose Antonio Silva
- Programa de Pós-graduação em Ciências da Reabilitação, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Ednei Luiz Antonio
- Departamento de Cardiologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Martha Trindade Manchini
- Programa de Pós-graduação em Ciências da Reabilitação, Universidade Nove de Julho, São Paulo, SP, Brazil
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Manchini MT, Serra AJ, Feliciano RDS, Santana ET, Antônio EL, de Tarso Camillo de Carvalho P, Montemor J, Crajoinas RO, Girardi ACC, Tucci PJF, Silva JA. Amelioration of cardiac function and activation of anti-inflammatory vasoactive peptides expression in the rat myocardium by low level laser therapy. PLoS One 2014; 9:e101270. [PMID: 24991808 PMCID: PMC4081549 DOI: 10.1371/journal.pone.0101270] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 06/05/2014] [Indexed: 11/18/2022] Open
Abstract
Low-level laser therapy (LLLT) has been used as an anti-inflammatory treatment in several disease conditions, even when inflammation is a secondary consequence, such as in myocardial infarction (MI). However, the mechanism by which LLLT is able to protect the remaining myocardium remains unclear. The present study tested the hypothesis that LLLT reduces inflammation after acute MI in female rats and ameliorates cardiac function. The potential participation of the Renin-Angiotensin System (RAS) and Kallikrein-Kinin System (KKS) vasoactive peptides was also evaluated. LLLT treatment effectively reduced MI size, attenuated the systolic dysfunction after MI, and decreased the myocardial mRNA expression of interleukin-1 beta and interleukin-6 in comparison to the non-irradiated rat tissue. In addition, LLLT treatment increased protein and mRNA levels of the Mas receptor, the mRNA expression of kinin B2 receptors and the circulating levels of plasma kallikrein compared to non-treated post-MI rats. On the other hand, the kinin B1 receptor mRNA expression decreased after LLLT. No significant changes were found in the expression of vascular endothelial growth factor (VEGF) in the myocardial remote area between laser-irradiated and non-irradiated post-MI rats. Capillaries density also remained similar between these two experimental groups. The mRNA expression of the inducible nitric oxide synthase (iNOS) was increased three days after MI, however, this effect was blunted by LLLT. Moreover, endothelial NOS mRNA content increased after LLLT. Plasma nitric oxide metabolites (NOx) concentration was increased three days after MI in non-treated rats and increased even further by LLLT treatment. Our data suggest that LLLT diminishes the acute inflammation in the myocardium, reduces infarct size and attenuates left ventricle dysfunction post-MI and increases vasoactive peptides expression and nitric oxide (NO) generation.
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Affiliation(s)
| | | | | | | | | | | | - Jairo Montemor
- Universidade Federal de São Paulo, UNIFESP, São Paulo, SP, Brasil
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dos Santos L, Gonçalves GA, Davel AP, Santos AA, Krieger JE, Rossoni LV, Tucci PJ. Cell therapy prevents structural, functional and molecular remodeling of remote non-infarcted myocardium. Int J Cardiol 2013; 168:3829-36. [DOI: 10.1016/j.ijcard.2013.06.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 04/29/2013] [Accepted: 06/20/2013] [Indexed: 11/25/2022]
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dos Santos AA, Helber I, Antonio EL, Franco MF, Tucci PJ. Severity of the cardiac impairment determines whether digitalis prolongs or reduces survival of rats with heart failure due to myocardial infarction. Int J Cardiol 2013; 167:357-61. [DOI: 10.1016/j.ijcard.2011.12.097] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 10/23/2011] [Accepted: 12/24/2011] [Indexed: 10/14/2022]
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Faria TDO, Baldo MP, Simões MR, Pereira RB, Mill JG, Vassallo DV, Stefanon I. Body weight loss after myocardial infarction in rats as a marker of early heart failure development. Arch Med Res 2011; 42:274-80. [PMID: 21820605 DOI: 10.1016/j.arcmed.2011.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 05/20/2011] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND AIMS We evaluated the use of body weight (BW) loss soon after acute myocardial infarction (MI) in rats as a marker of acute heart failure (HF). METHODS Female Wistar rats (200-240 g) were submitted either to sham operation or to coronary artery occlusion. In individual cages, daily BW and food and water intake were measured. Seven days later, cardiac function was evaluated by left ventricular catheterization. HF was defined by a left ventricular end-diastolic pressure greater than the upper limit of the 95% confidence interval. MI group was then divided into those that developed HF (n = 27; MI-HF) and those that did not (n = 47; MI). RESULTS The MI-HF group experienced increased BW loss (sham: 4.2 ± 0.6% MI: 0.4 ± 0.8%, MI-HF: -4.9 ± 1.2%; p <0.05) and reduced water and food intake compared with other groups. HF animals showed greater lung weight (sham: 1.460 ± 0.076 g, MI: 1.748 ± 0.086 g, MI-HF: 2.033 ± 0.13 g; p <0.05). Infarct area was significantly different between the groups (MI: 35.9 ± 0.9%, MI-HF: 39.7 ± 1.3%; p <0.05). ROC curve showed that BW loss over 7 days has 100% sensitivity and 72.3% specificity for identifying acute HF. Moreover, excluding the effect of infarct area on these results, a sample of animals with the same infarct area displayed similar morphometric and hemodynamic patterns as the entire sample. Multivariate linear regression analysis confirmed that BW loss is a HF marker independent of infarct area. CONCLUSIONS BW is an easy and reliable noninvasive method to detect HF early after MI in rats.
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Wang J, Bai L, Li J, Sun C, Zhao J, Cui C, Han K, Liu Y, Zhuo X, Wang T, Liu P, Fan F, Guan Y, Ma A. Proteomic analysis of mitochondria reveals a metabolic switch from fatty acid oxidation to glycolysis in the failing heart. ACTA ACUST UNITED AC 2009; 52:1003-10. [PMID: 19937197 DOI: 10.1007/s11427-009-0140-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 06/11/2009] [Indexed: 10/20/2022]
Abstract
This work characterizes the mitochondrial proteomic profile in the failing heart and elucidates the molecular basis of mitochondria in heart failure. Heart failure was induced in rats by myocardial infarction, and mitochondria were isolated from hearts by differential centrifugation. Using two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization-time of flight mass spectrometry, a system biology approach was employed to investigate differences in mitochondrial proteins between normal and failing hearts. Mass spectrometry identified 27 proteins differentially expressed that involved in energy metabolism. Among those, the up-regulated proteins included tricarboxylic acid cycle enzymes and pyruvate dehydrogenase complex subunits while the down-regulated proteins were involved in fatty acid oxidation and the OXPHOS complex. These results suggest a substantial metabolic switch from free fatty acid oxidation to glycolysis in heart failure and provide molecular evidence for alterations in the structural and functional parameters of mitochondria that may contribute to cardiac dysfunction during ischemic injury.
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Affiliation(s)
- Jun Wang
- Department of Cardiology, First Affiliated Hospital ofMedical College of Xi'an Jiaotong University, Xi'an, China
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