title: Linkage analysis of three families with arrythmogenic right ventricular cardiomyopathy in India.
abstract: BACKGROUND
  Arrythmogenic Right Ventricular Cardiomyopathy (ARVC) is a primary myocardial disorder morphologically characterized by subtle to severe replacement of the right ventricular myocardium by fatty and fibrous tissue. ARVC is known to be highly prevalent in European population with recent reports implicating it to be a major cause of sudden death in young individuals even from American and Asian population.
  
  
  OBJECTIVE
  To implicate or exclude TMEM43 (ARVC-5), DSP(ARVC-8) genes and the yet to be identified gene at ARVC-6 locus in the pathogenesis in three families affected with ARVC from India.
  
  
  METHODS
  Three families comprising of 42 affected/unaffected members were included in the study. Three microsatellite markers, D3S3613 (ARVC5) D10S1664 (ARVC6), D6S309 (ARVC8) were genotyped by PCR-based native PAGE. Two-point Linkage analysis was performed using LINKAGE program version 5.2
  
  
  CONCLUSIONS
  LOD scores from linkage analysis for the microsatellite marker D10S1664 (ARVC-6) in families KS and REV have shown positive value hinting the involvement of this locus in the etiology of ARVC, while linkage analysis in the SB family ruled out involvement of DSP, TMEM43 and ARVC-6, as negative LOD scores were obtained with all three loci. Therefore, linkage analysis carried out in the present study indicates that ARVC-6 (cumulative LOD score is equal to plus 1.203376 at theta is equal to 0.05) could be the locus harboring the mutated gene in two out of three families.
authors.affiliation: Department of Genetics, Osmania University, Hyderabad, India.
authors.forename: Maithili V N
authors.initials: MV
authors.lastname: Dokuparthi
authors.forename: Pranathi R
authors.initials: PR
authors.lastname: Pamuru
authors.forename: Sai S
authors.initials: SS
authors.lastname: Oruganti
authors.forename: Narsimhan
authors.initials: N
authors.lastname: Calambur
authors.forename: Pratibha
authors.initials: P
authors.lastname: Nallari