title: Human lung microRNA profiling in pulmonary arterial hypertension secondary to congenital heart defect.
abstract: OBJECTIVE
  Although several microRNAs were reported to play essential roles in pulmonary artery hypertension due to hypoxia or monocrotaline, their potential role in pulmonary arterial hypertension secondary to congenital heart disease is largely unknown. This study aimed to indentify microRNAs implicated in pulmonary arterial hypertension secondary to congenital heart disease in children.
  
  
  METHODS
  Using microRNAs microarray, we profiled the microRNAs in the lung specimen from 12 congenital heart disease patients, (6 with pulmonary arterial hypertension and the others without). We validated the microRNAs expression using RT-PCR experiments. Then, we predicted the target genes of the promising microRNAs by bioinformatical analysis and verified its regulating role by luciferase assay and western blot experiments.
  
  
  RESULTS
  All the 12 patients were uneventfully recovered from cardiac surgery. Comparing to the non-pulmonary arterial hypertension lung tissue, 62 microRNAs were significantly up-regulated and 12 were significantly de-regulated in the pulmonary arterial hypertension lung tissue. Among them 27 microRNAs reached P values ≤ 0.05, we validated the up-regulation of microRNA-27b by RT-PCR experiments and found the expression level of microRNA-27b was correlated with preoperative mean pulmonary arterial pressure. In vitro, overexpression of microRNA-27b decreased the protein expression of NOTCH1 and significantly reduced luciferase activity.
  
  
  CONCLUSIONS
  The current study revealed for the first time that microRNAs may be important regulators in pulmonary arterial hypertension secondary to congenital heart disease, and demonstrated the correlation between microRNA-27b and pulmonary arterial hypertension with the implication of NOTCH1.
authors.affiliation: Department of Pediatric Cardiac Surgery, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, PR China.
authors.forename: Weidan
authors.initials: W
authors.lastname: Chen
authors.affiliation: Department of Pediatric Cardiac Surgery, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Pediatric Cardiac Surgery, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Shoujun
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Pediatric Cardiac Surgery, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Xiangbin
authors.initials: X
authors.lastname: Pan
authors.affiliation: Department of Pediatric Cardiac Surgery, National Center for Cardiovascular Disease and Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China.
authors.forename: Qiuming
authors.initials: Q
authors.lastname: Chen
mesh_terms: D002648:Child; D002675:Child, Preschool; D015536:Down-Regulation; D005260:Female; D006330:Heart Defects, Congenital / Q000150:complications* / Q000601:surgery; D006801:Humans; D006976:Hypertension, Pulmonary / Q000235:genetics / Q000378:metabolism* / Q000601:surgery; D007223:Infant; D008168:Lung / Q000378:metabolism*; D008297:Male; D035683:MicroRNAs / Q000378:metabolism*; D046228:Microarray Analysis; D060888:Real-Time Polymerase Chain Reaction; D051881:Receptor, Notch1 / Q000378:metabolism; D015854:Up-Regulation
chemical_list: C531388:MIRN27 microRNA, human; D035683:MicroRNAs; C497761:NOTCH1 protein, human; D051881:Receptor, Notch1
keywords: Notch1; congenital heart defects; microRNA; molecular biology; pulmonary arterial hypertension