Abstract
For the purpose of studying immunogenetic factors related to disease susceptibility to systemic lupus erythematosus (SLE), HLA-A, B and DR typing was performed by the standard lymphocyte microcytotoxicity test using 247 typing antisera in 34 Japanese patients with SLE and 51 healthy individuals.
The results obtained were as follows:
1) SLE patients with proteinuria had the association with HLA-BW 35 (phenotype frequency 50.0%, Relative Risk=7.5, corrected P<0.10), compared with normal control (11.8%). SLE patients without proteinuria had the association with HLA-BW 55 (phenotype frequency 35.0%, RR=8.6, Pc<0.10), compared with normal control (5.9%).
2) Patients with SLE had the strong association with HLA-DRW 9 (phenotype frequency 52.9%, RR=4.6, Pc<0.025), compared with normal control (19.6%).
3) All of the peripheral blood lymphocytes obtained from 10 patients with SLE who had anti-RNP antibody reacted with MT 3, which was one of the B-cell alloantisera including three antibodies against HLA-DR 4, DR 7 and DRW 9.
4) The linkage disequilibrium between HLA-BW 61 and HLA-DRW 9 was seen in the patients with SLE.
