Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling.

Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Research Abstract Details 

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Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Abstract Text:

Mohammad Shakil Ahmed,Erik ,Leif Erik Vinge,Thomas G von Lueder,Toril Attramadal, Attramadal,

OBJECTIVES: Pulmonary remodeling is a well recognized consequence of heart failure (HF). However, the cellular and molecular mechanisms orchestrating the structural alterations of the lungs in HF are poorly understood. We have previously reported induction of the profibrotic peptide connective tissue growth factor (CTGF) in myocardial tissue of rats with HF, suggesting a role of CTGF during myocardial remodeling. The aim of the present study was to explore the potential role of CTGF in pulmonary remodeling in HF. METHODS: Pulmonary tissue samples were obtained from rats with myocardial infarction (MI) subsequent to ligation of the left coronary artery. Real-time quantitative RT-PCR was employed to investigate mRNA levels. The cellular distribution of CTGF was analysed by immunohistochemistry. RESULTS: Seven days after induction of myocardial infarction (MI) and HF in rats we found 2.3-fold and 1.9-fold increase of pulmonary transforming growth factor-beta1 and procollagen alpha1(I) mRNA levels, respectively, and typical morphological characteristics of pulmonary remodeling including interstitial fibrosis and medial thickening of pulmonary arteries. Pulmonary CTGF mRNA levels were substantially elevated in HF rats compared to sham-operated rats (4-fold; P<0.05) and corresponded with similar increase (3-fold; P<0.05) of pulmonary CTGF protein contents. Immunohistochemical analysis revealed increased pulmonary anti-CTGF immunoreactivity in HF, with immunostaining predominantly localized to alveolar macrophages and interstitial fibroblasts. Isolated alveolar macrophages from HF rats demonstrated substantial induction of CTGF mRNA expression (16-fold; p<0.05). Interestingly, platelets caused robust induction of CTGF mRNA expression in alveolar macrophages upon co-culture in vitro. CONCLUSION: Pulmonary CTGF was substantially increased in parallel with pulmonary remodeling in rats with HF. Our data indicate that alveolar macrophages are a major source of increased pulmonary CTGF in HF and that CTGF may be a player in the profibrotic mechanisms associated with HF.

Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Publishing Authors By Initials

MS Ahmed,E ,LE Vinge,TG von Lueder,T Attramadal,H Attramadal,

For similar cardiovascular diseases: vascular diseases research abstracts see: cardiovascular diseases: vascular diseases research

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Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Cardiovascular research

VOLUME: 74

Page Numbers: 323-33

Journal Abbreviation:

ISSN: 0008-6363

DAY: 13

MONTH: 12

YEAR: 2006

Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Information

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LANGUAGE: eng

NlmUniqueID: 77427

Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Keywords Mesh Terms:

KEYWORDS: Vascular Diseases

MESH TERMS: pathology

Chemical & Substance for Abstract: Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling. Information

Substance Name: connective tissue growth factor

Registry Number: 139568-91-5

Grant and Affiliation Information for Induction of pulmonary connective tissue growth factor in heart failure is associated with pulmonary parenchymal and vascular remodeling.

AFFILIATION: Institute for Surgical Research, University of Oslo, and Department of Cardiology, Rikshospitalet University Hospital, Oslo, Norway.

Country: Netherlands

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MEDLINETA: Cardiovasc Res

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