T-cell-receptor Beta- and I-A Beta-chain Genes of Normal SWR Mice Are Linked with the Development of Lupus Nephritis in NZB X SWR Crosses
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The incidence of nephritis in autoimmune New Zealand Black (NZB) mice is low, but when they are crossed with normal SWR mice, almost 100% of the female F1 hybrids (SNF1) develop lethal glomerulonephritis. To define the contribution of the normal SWR strain to the development of nephritis, we analyzed the association of the I-A beta-chain gene of Ia-encoding region, the T-cell-receptor beta (TcR beta)-chain gene, and immunoglobulin heavy-chain allotype (IgH) with the development of lupus nephritis in 165 NZB X SWR crosses. We found that genes linked to the TcR and Ir gene loci of the normal SWR mice interacted with NZB-derived genes, leading to the development of accelerated and severe nephritis in the NZB X SWR crosses.
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