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Transforming growth factor-β/Smad signaling function in the aortopathies / Fator transformador de crescimento-β/Smad como via de sinalização em aortopatias
Yuan, Shi-Min; Wang, Jun; Hu, Xiao-Nan; Li, De-Min; Jing, Hua.
  • Yuan, Shi-Min; Affiliated Hospital of Taishan Medical College. Department of Cardiothoracic Surgery. Taian. CN
  • Wang, Jun; Nanjing University. School of Clinical Medicine. Jinling Hospital. Department of Cardiothoracic Surgery.
  • Hu, Xiao-Nan; Nanjing University. School of Clinical Medicine. Jinling Hospital. Department of Cardiothoracic Surgery.
  • Li, De-Min; Nanjing University. School of Clinical Medicine. Jinling Hospital. Department of Cardiothoracic Surgery.
  • Jing, Hua; Nanjing University. School of Clinical Medicine. Jinling Hospital. Department of Cardiothoracic Surgery.
Rev. bras. cir. cardiovasc ; 26(3): 393-403, jul.-set. 2011.
Article in English | LILACS | ID: lil-624521
ABSTRACT

OBJECTIVES:

Transforming growth factor (TGF)-β/Smad signaling pathway in aortic dissection patients and normal subjects has not been previously described. The present study was designed to evaluate the TGF-β/Smad signaling expressions in the patients with acute type A aortic dissection in comparison with those in the patients with thoracic aortic aneurysm and with coronary artery disease, and (or) the healthy subjects.

METHODS:

Consecutive surgical patients for acute type A aortic dissection (20 patients), aortic aneurysm (nine patients) or coronary artery disease (20 patients) were selected into this study. Blood samples (4 ml) were obtained from the right radial arterial indwelling catheter after systemic heparinization prior to the start of cardiopulmonary bypass in the operating room. Twenty-one young healthy volunteers without underlying health issues who donated forearm venous blood samples (4 ml) were taken as control. The surgical specimens of the aortic tissues were obtained immediately after they were severed during the operations of the replacement of the aorta in the patients with aortic dissection or aortic aneurysm. In patients receiving coronary artery bypass grafting, the tiny aortic tissues were taken when the punch holes of the proximal anastomosis on the anterior wall of the ascending aorta were made. The aortic tissues were for RNA, protein, or supernatant preparations until detection of TGF-β1 mRNA by quantitative real-time reverse transcription polymerase chain reaction, of TGF-β1, TGF-β receptor I, Smad2/3, Smad4 and Smad7 by Western blot, and of TGF-β1 by enzyme-linked immunosorbent assay, respectively. In particular, the linear correlations of the relative grayscales between different proteins of each group, and those correlations between the quantitative TGF-β1 by enzyme-linked immunosorbent assay and the time interval from the onset to surgery or the maximal dimensions of the ...
RESUMO

OBJETIVOS:

Fator transformador de crescimento (TGF) -β/ Smad como via de sinalização em casos de dissecção aórtica e indivíduos normais não foi descrito anteriormente. O presente estudo foi elaborado para avaliar as expressões TGF-β/Smad como via de sinalização nos pacientes com dissecção aguda da aorta, em comparação com que nos pacientes com aneurisma da aorta torácica e com doença arterial coronariana, e (ou) com indivíduos saudáveis.

MÉTODOS:

Pacientes cirúrgicos consecutivos para o tipo A de dissecção aguda da aorta (20 pacientes), aneurisma da aorta (nove pacientes) ou doença arterial coronária (20 pacientes) foram selecionados para este estudo. Amostras de sangue (4 ml) foram obtidas a partir do cateter arterial radial direito após heparinização sistêmica antes do início da circulação extracorpórea na sala de cirurgia. Vinte e um voluntários jovens e saudáveis, sem problemas de saúde subjacentes que doaram amostras de sangue venoso do antebraço (4 ml) foram tomados como controle. Os espécimes cirúrgicos de tecidos aórtico foram obtidos imediatamente após terem sido cortados durante as operações da substituição da aorta nos pacientes com dissecção aórtica ou aneurisma da aorta. Em pacientes que foram submetidos à cirurgia de revascularização miocárdica, os tecidos da aorta minúsculos foram obtidos quando os orifícios da anastomose proximal na parede anterior da aorta ascendente foram feitos. Os tecidos da aorta foram para a RNA, proteínas ou preparações sobrenadantes até a detecção de TGF-β1 mRNA pela reação de transcrição reversa quantitativa em tempo real em cadeia da polimerase, de TGF-β1, receptor I de TGF-β, Smad2/3, Smad4 e Smad7 por Western Blot, e de TGF-β1 pelo teste de ELISA, respectivamente. Em particular, as correlações lineares dos tons de cinza relativo entre diferentes proteínas de cada grupo, e aquelas correlações entre os quantitativos TGF-β1 pelo teste de ELISA e o intervalo de ...
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Transforming Growth Factor beta / Aortic Aneurysm, Thoracic / Smad Proteins / Aortic Dissection Type of study: Observational study Limits: Female / Humans / Male Language: English Journal: Rev. bras. cir. cardiovasc Journal subject: Cardiology / General Surgery Year: 2011 Type: Article Affiliation country: China Institution/Affiliation country: Affiliated Hospital of Taishan Medical College/CN

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Full text: Available Index: LILACS (Americas) Main subject: Transforming Growth Factor beta / Aortic Aneurysm, Thoracic / Smad Proteins / Aortic Dissection Type of study: Observational study Limits: Female / Humans / Male Language: English Journal: Rev. bras. cir. cardiovasc Journal subject: Cardiology / General Surgery Year: 2011 Type: Article Affiliation country: China Institution/Affiliation country: Affiliated Hospital of Taishan Medical College/CN