title: Expression of coxsackievirus and adenovirus receptor and its cellular localization in myocardial tissues of dilated cardiomyopathy.
abstract: BACKGROUND
  Myocarditis and dilated cardiomyopathy (DCM) are common causes of morbidity and mortality in children and adults. Recently, the human coxsackievirus and adenovirus receptor (CAR), a common receptor for coxsackieviruses and adenoviruses, was discovered and its increased expression has been reported in patients with DCM and myocarditis.
  
  
  OBJECTIVE
  To measure the expression of CAR in myocardial tissues of patients with DCM and its cellular localization in DCM cases.
  
  
  METHODS
  Formalin-fixed myocardial tissues collected during autopsy from 26 cases of DCM, and 20 cases each of noncardiac disease and cardiac disease other than DCM were included as the test group, and control groups A and B, respectively. Expression of CAR was studied using immunohistochemical staining of myocardial tissue with a CAR-specific rabbit polyclonal antibody. CAR messenger RNA was semiquantified by reverse transcription polymerase chain reaction followed by agarose gel analysis and measurement of band intensity.
  
  
  RESULTS
  CAR positivity in DCM cases was found to be 96% (25 of 26) compared with 30% in control group A and 40% in control group B. CAR was found to be expressed in myocytes, endothelial and interstitial cells; however, positivity in myocytes was significantly higher than in other cells in all groups. The site of CAR expression was predominantly the sarcolemma along with cytoplasm in cardiomyocytes.
  
  
  CONCLUSIONS
  The present study highlighted the increased expression of CAR in DCM cases, with localization in myocytes and endothelial cells.
authors.affiliation: Department of Virology, Post Graduate Institute of Medical Education & Research, Chandigarh, India.
authors.forename: Tripta
authors.initials: T
authors.lastname: Kaur
authors.forename: Baijayantimala
authors.initials: B
authors.lastname: Mishra
authors.forename: Uma Nahar
authors.initials: UN
authors.lastname: Saikia
authors.forename: Mirnalini
authors.initials: M
authors.lastname: Sharma
authors.forename: Ajay
authors.initials: A
authors.lastname: Bahl
authors.forename: Radha Kanta
authors.initials: RK
authors.lastname: Ratho
keywords: Autopsy; CAR; Dilated cardiomyopathy; Myocarditis