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  • Title: Neonatal lupus erythematosus: analysis of HLA class II alleles in mothers and siblings from seven Japanese families.
    Author: Miyagawa S, Shinohara K, Fujita T, Kidoguchi K, Fukumoto T, Hashimoto K, Yoshioka A, Shirai T.
    Journal: J Am Acad Dermatol; 1997 Feb; 36(2 Pt 1):186-90. PubMed ID: 9039166.
    Abstract:
    BACKGROUND: Neonatal lupus erythematosus (NLE) is a syndrome characterized by dermatitis and congenital heart block. The disease is mostly associated with transplacental passage of maternal anti-Ro(SS-A) or anti-La(SS-B) antibodies. Maternal HLA-DR3 and DQ2 alleles are associated with NLE in white and North American black populations. OBJECTIVE: We sought evidence of a potential genetic disposition to NLE in mothers with a relatively homogeneous ethnic background. METHODS: Class II human major histocompatibility complex HLA-DRB1, DQA1, DQB1, and DPB1 alleles were determined by polymerase chain reaction-restriction fragment length polymorphism in anti-Ro(SS-A)-positive mothers as well as in infants from seven Japanese families with siblings concordant or discordant for disease expression of NLE. RESULTS: All seven mothers had two or three DQ alleles of DQA1 and DQB1 possessing specific amino acid residues, which are reportedly associated with anti-Ro(SS-A) autoantibody response in white and black populations. There was no class II HLA profile that distinguished disease manifestations of NLE in infants. CONCLUSION: The HLA class II allele associations with anti-Ro(SS-A) autoantibodies that have been noted in other ethnic groups were also found in Japanese anti-Ro(SS-A)-positive mothers whose infants had NLE, suggesting shared susceptibility factors across racial barriers in maternal predisposition to Ro(SS-A) autoimmune response.
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