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Related Experiment Videos

Genetics of psoriasis

T Henseler1

  • 1Department of Dermatology, University of Kiel, Germany. thenseler@dermatology.uni-kiel.de

Archives of Dermatological Research
|November 10, 1998
PubMed
Summary
This summary is machine-generated.

Psoriasis has two subtypes, type I and type II, differing in age of onset, human leukocyte antigen (HLA) allele frequencies, and familial inheritance patterns. Genetic studies reveal susceptibility genes on multiple chromosomes, indicating psoriasis is a complex, multifactorial disease.

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Area of Science:

  • Dermatology and Genetics
  • Immunogenetics

Background:

  • Non-pustular psoriasis presents as two distinct subtypes: type I and type II.
  • These subtypes differ in age of onset, human leukocyte antigen (HLA) allele frequencies, and familial inheritance.
  • Psoriasis is a common (2%) multifactorial and heterogeneously inherited disease, influenced by genetic and environmental factors.

Purpose of the Study:

  • To investigate the distinct characteristics and genetic underpinnings of non-pustular psoriasis subtypes.
  • To explore the genetic markers and susceptibility loci associated with psoriasis.
  • To understand the contribution of genetic and environmental factors to psoriasis etiology.

Main Methods:

  • Comparative analysis of clinical presentation (age of onset) between psoriasis subtypes.

Related Experiment Videos

  • Human leukocyte antigen (HLA) allele frequency analysis.
  • Microsatellite techniques to identify disease susceptibility genes and linkage analysis on specific chromosomes.

    • Main Results:

    • Type I psoriasis typically appears before age 40, is associated with HLA-Cw6, -B57, -DR7, and shows familial inheritance.
    • Type II psoriasis typically appears after age 40, is associated with HLA-Cw2, and lacks familial inheritance.
    • Increased frequencies of extended haplotypes (e.g., EH57.1, EH65.1) in type I psoriasis.
    • Putative psoriasis susceptibility genes identified on chromosomes 4q, 6p, 16q, 17q, and 20p.
    • Genes regulating epidermal differentiation on chromosome 1q are implicated.
    • Psoriasis gene loci suggested on chromosomes 2, 8, and 20.

    Conclusions:

    • Non-pustular psoriasis comprises genetically distinct subtypes with varying clinical and genetic profiles.
    • Psoriasis susceptibility is linked to specific HLA alleles and extended haplotypes, as well as genes on multiple chromosomes.
    • Environmental factors and genetic predisposition interact to trigger psoriasis onset.