Psoriasis susceptibility locus in chromosome region 3q21 identified in patients from southwest Sweden

Eur J Hum Genet. 1999 Oct-Nov;7(7):783-90. doi: 10.1038/sj.ejhg.5200365.


We have performed a pair-wise linkage study in the search for psoriasis susceptibility regions. A preliminary scan was performed on 20 families. In this set we obtained indications of linkage on chromosome 3q21. This region was further investigated using material from a total of 104 families (set 1B) resulting in a non-parametric linkage (NPL) of 1.77. The material was stratified in families whose parental origin is in southwest Sweden (set 1C). A maximum NPL value of 2.77 was obtained in this group. A transmission disequilibrium test (TDT) was performed on the stratified material (set 1C) and a significant P value of 0.005 was obtained, at marker D3S1269. The locus was confirmed with TDT in replicate material consisting of 148 families in which a single member was affected (P value 0.0007) at marker D3S1551. Thus, we have observed a significant P value using TDT in the vicinity of markers D3S1269/D3S1551, suggesting a novel psoriasis susceptibility region.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromosome Mapping
  • Chromosomes, Human, Pair 3 / genetics*
  • Family
  • Female
  • Genetic Linkage
  • Genetic Predisposition to Disease / genetics*
  • Humans
  • Linkage Disequilibrium / genetics*
  • Male
  • Psoriasis / genetics*
  • Sweden