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Evidence against HLA and immunological dependence of disease outbreak in SLE. Immunological characterisation of identical twins clinically discordant for SLE.
  1. E Soppi,
  2. J Eskola,
  3. A Lehtonen

    Abstract

    Identical female twins clinically discordant for 20 years for SLE were studied. Their HLA-haplotype was A1,28; B8w6,w35; Cw3,w7; Dr3,4. Both twins had a raised erythrocyte sedimentation rate, autoantibodies, and circulating immune complexes. The diseases sibling had a reversed OKT4/OKT8 ratio (0.43), decreased helper T cell number, defective pokeweed mitogen (PWM) induced plasma cell differentiation, and overactive hydrocortisone sensitive suppressor cells. Immunological abnormalities may be only partly HLA related (B8; Dr3), but are most probably secondary to the disease process in the sibling with SLE. Exogenous and/or endogenous factor(s) other than genetic or immunological are suggested as being operative in the predisposition to and expression of SLE.

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