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Lionel Fry

Lionel Fry

Imperial College London, UK

Title: Psoriasis is not autoimmune

Biography

Biography: Lionel Fry

Abstract

Psoriasis is considered to be autoimmune. This is based on cross-reactive peptides, between streptococcal and keratin peptides. However studies have reported that these peptides react with CD8 T cells. But it is CD4 T cells which initiate psoriasis. Recently it has been reported that Streptococcus is the commonest organism found in the skin of psoriasis. It is now proposed that a streptococcal peptidoglycan is the antigen which initiates and maintains psoriasis. This is supported by the polymorphism of the genes reported in psoriasis. The genes found in psoriasis are those concerned with innate immunity and those concerned with PGRP-3 and 4.