SciELO - Scientific Electronic Library Online

 
vol.134 número9Variantes alélicas de CYP1A1 y GSTM1 como biomarcadores de susceptibilidad a cáncer gástrico: influencia de los hábitos tabáquico y alcohólicoComparación de distintos métodos para evaluar la función androgénica en el adulto mayor índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista médica de Chile

versión impresa ISSN 0034-9887

Resumen

CARTIER R, Luis; FERNANDEZ O, Jorge  y  RAMIREZ V, Eugenio. Genetic markers in four Chilean families with familial Creutzfeldt-Jakob disease. Rev. méd. Chile [online]. 2006, vol.134, n.9, pp. 1116-1122. ISSN 0034-9887.  http://dx.doi.org/10.4067/S0034-98872006000900005.

Background: Creutzfeldt-Jakob disease (CJD) is a form of transmissible spongiform encephalopathy, in which a prion protein (PrPSc) accumulates in the brain of affected individuals. Chile has a prevalence of CJD that is more than twice than in the rest of the world and has the highest rate of familial forms. These later forms are associated with the heterozygocity of codon 200 of PrP protein gene. Aim: To search susceptibility genetic markers of CJD in members of families affected by CJD. Material and methods: A blood sample was obtained from 50 individuals pertaining to four families affected by CJD. DNA from peripheral mononuclear cells was amplified by polymerase chain reaction and sequenced for the gene that codifies PrP protein. Results: In family A, 21 of 23 members were homozygotes for codon 129 (Met/Met) and eight were simultaneously heterozygotes for codon 200 (Glu/Lys). In family B, six of nine members were homozygotes for codon 129, five were heterozygotes for codon 200 and four had both mutations. In family C, the four analyzed subjects were homozygotes for codon 129 and two were simultaneously heterozygotes for codon 200. In family D, nine of 14 members were homozygotes for codon 129 and two were simultaneously homozygotes for codon 200. No family had polymorphisms for codon 219. Conclusions: Thirty two percent of analyzed subjects were homozygotes for codon 129 and heterozygotes for codon 200, condition that defines the genetic susceptibility to acquire CJD. The dominant tendency of these genotypes could explain the higher incidence of CJF in Chile

Palabras clave : CJD (Creutzfeldt-Jakob disease); Gene components; PrPSc proteins.

        · texto en Español     · pdf en Español