HLA Class II with Lupus Nephritis in Moroccan Patients

ABSTRACT

Lupus nephritis (LN) is a disease with a poor prognosis. The association between LN and the Human leukocyte antigen (HLA) genes has never been studied on a Moroccan population. The aim of this work was to evaluate the distribution of the HLA class II alleles in patients with LN and to determine susceptible and protective HLA alleles/haplotypes in LN. The association between these alleles, disease severity of LN, and age at onset were also investigated. Seventy-five patients with LN were compared with 169 healthy unrelated controls. HLA class II alleles typing was performed by polymerase chain reaction-sequence-specific primers (PCR-SSP). A significant increase of HLA-DRB1*15 allele frequency (p = 0.001) and a significant decrease of the HLA-DRB1*04 allele (p = 0.04) were observed in LN patients. The frequency of HLA-DRB1*15-DQB1*06 haplotype (p = 0.003) was increased in the patients while that of HLA-DRB1*04-DQB1*03 (p = 0.027) was decreased. A significant increase of HLA-DRB1*15 allele frequency (p = 0.0001) and HLA-DRB1*15-DQB1*06 haplotype (p = 0.002) was observed in patients with class IV LN. In the Moroccan population we demonstrated the positive association of HLA class II alleles and haplotypes with LN and with a severe form of nephritis. HLA-DRB1*15 allele does not determine the age of disease onset in LN.

KEYWORDS:

• Human leukocyte antigen
• lupus nephritis
• Moroccan population

Acknowledgment

The authors are thankful to all of the LN patients who participated in this study.

Declaration of interest

The authors declare that they have no conflicts of interest concerning this article.

Funding

This work was supported by a grant from the University Mohamed V, Rabat, Morocco.

Additional information

Funding

This work was supported by a grant from the University Mohamed V, Rabat, Morocco. The authors are thankful to all of the LN patients who participated in this study.