Dataset Information


RNA Expression Profiling of Lung Tissue Identifies Mutually Distinct Molecular Signatures in PAH and PH Secondary to IPF

ABSTRACT: Idiopathic pulmonary arterial hypertension (PAH) is a life-threatening condition characterized by pulmonary arteriolar remodeling, and is frequently associated with right heart failure. This study identifies significant novel biological changes in eight genes and several genetic pathways, that were likely to contribute to the pathogenesis of PAH. We also demonstrate that PAH and PH secondary to idiopathic pulmonary fibrosis (IPF) are characterized by distinct gene expression signatures, implying distinct pathophysiological mechanisms. Keywords: disease versus control Keywords: Expression profiling by array Overall design: Fresh frozen lung tissue specimens from PAH subjects (n=18), IPF subjects with secondary PH (n=8), and normal controls (n=13) were obtained from the University of Pittsburgh Health Sciences Tissue Bank following approval by the University of Pittsburgh Institutional Review Board. Total RNA was isolated from lung tissue using Trizol (Invitrogen) and purified using the RNeasy Mini kit (Qiagen). RNA quantity and quality was assessed using Agilent Nanodrop and Agilent 2100 Bioanalyzer, respectively. 500 ng of total RNA meeting was Cy3 labeled using the Agilent Low RNA Input Linear Amplification Kit PLUS (One-Color). After purification and fragmentation, aliquots of each sample were hybridized to an Agilent Whole Human Genome 4 X 44K microarray, sequentially washed, and scanned on an Agilent DNA microarray scanner.

INSTRUMENT(S): Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Probe Name version)

SUBMITTER: Ferhaan Ahmad  

PROVIDER: GSE15197 | GEO | 2010-01-22



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Genomewide RNA expression profiling in lung identifies distinct signatures in idiopathic pulmonary arterial hypertension and secondary pulmonary hypertension.

Rajkumar Revathi R   Konishi Kazuhisa K   Richards Thomas J TJ   Ishizawar David C DC   Wiechert Andrew C AC   Kaminski Naftali N   Ahmad Ferhaan F  

American journal of physiology. Heart and circulatory physiology 20100115 4

Idiopathic pulmonary arterial hypertension (PAH) is a life-threatening condition characterized by pulmonary arteriolar remodeling. This investigation aimed to identify genes involved specifically in the pathogenesis of PAH and not other forms of pulmonary hypertension (PH). Using genomewide microarray analysis, we generated the largest data set to date of RNA expression profiles from lung tissue specimens from 1) 18 PAH subjects and 2) 8 subjects with PH secondary to idiopathic pulmonary fibrosi  ...[more]

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