Learning in year-old female autoimmune BXSB mice

Physiology & Behavior
G W BoehmVictor H Denenberg

Abstract

BXSB/ MpJ-Yaa and NZB/BINJ mice have been used as animal models for both developmental learning disability and systemic autoimmune disease. Approximately 40-60% of these animals show ectopic clusters of neurons in Layer I of cortex similar to those found in postmortem analyses of human dyslexics, and all exhibit an autoimmune condition similar to systemic lupus erythematosus (SLE) in humans. The expression of immune disease in the BXSB strain, unlike in humans, is more severe in males than females. Most previous studies have examined the behavioral sequelae of neocortical ectopias at a relatively young age, when the BXSB females (unlike the male BXSB and female and male NZBs) are not yet showing high titers of autoantibodies associated with their lupus-like form of autoimmune disease. This study examined the behavior of BXSB females at an age subsequent to autoimmune disease onset. When contrasted with younger animals, year-old BXSB females showed good learning behavior, with no differences in Lashley maze learning and remarkably good performance in a visual discrimination learning task. These results are consistent with other data which indicate that many types of learning behavior are apparently unperturbed by systemic autoim...Continue Reading

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