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Strain BXSB/Mp mice develop a spontaneous lupus-like syndrome which is strikingly accelerated in males. The accelerated autoimmune disease occurs in male F1 hybrids with strains NZB/BINJ, SJL/J, and C57BL/6J when the male parent is BXSB but not in the reciprocal hybrid male nor in females. The pattern is similar in F2 hybrids with strains NZB and SJL. The accelerated disease in males occurs only when the Y chromosome is derived from recombinant inbred strain BXSB and ultimately from strain SB/Le.
Murphy et al. (Thu,) studied this question.