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- W2022863138 abstract "The lateral septal area (LSA) has been implicated in the control of various psychoneuroendocrine processes in the rat. Interactions between the endocrine and immune systems and sex differences in immunity reflect the interdependence of the immune and neuroendocrine systems. Kainic acid (KA) lesions in the lateral septal area not only modify neuroendocrine processes, but also produce a suppression of humoral immunity in female rats. Presently, we have evaluated the effects of neurotoxic lesions in the LSA on the humoral immune response and body weight regulation of male and female rats. Bilateral lesions in the LSA of adult male and female rats were produced by stereotaxically infusing either 0.25 microliters of kainic acid (1.5 micrograms/microliters) or 0.5 microliters of domoic acid (DA; 0.3 micrograms/microliters) into the LSA. In an additional study, LSA lesions using 0.25 microliters of DA (0.6 micrograms/microliters) were produced in female rats only. Sham operations consisted of bilateral injections of 0.9% saline into the LSA. The effects of these lesions on antibody production, following immunization with 100 micrograms ovalbumin in complete Freund's adjuvant, were examined. Blood samples were collected on Days 7 and 14 following immunization. The anti-ovalbumin IgM and IgG antibody titers were measured by an enzyme amplified ELISA assay. As found previously, KA-induced LSA lesions in adult female rats produced an increase in body weight and a suppression of the humoral immune response. However, LSA lesions produced with the neurotoxin DA had a similar effect on body weight but had no effect on humoral immunity. In male rats, neither body weight regulation nor the humoral immune response was affected by KA or DA lesions in the LSA. These results indicate that the effects of neurotoxic LSA lesions on body weight regulation and the humoral immune response are sex specific and further demonstrate that two closely related kainate neurotoxins have differential effects on the humoral immune response, but have similar effects on body weight regulation. Thus, neurons in the LSA of female rats that are involved in the inhibitory control of body weight are susceptible to both KA and DA, whereas neurons in the LSA associated with immunoregulation are differentially affected by KA and DA. Of further interest, a sex difference in DA susceptibility was noted, with male rats showing greater cell loss in the LSA following DA infusions, as compared to female rats." @default.
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- W2022863138 date "1991-08-01" @default.
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- W2022863138 title "Differential and sex-specific effects of kainic acid and domoic acid lesions in the lateral septal area of rats on immune function and body weight regulation" @default.
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- W2022863138 doi "https://doi.org/10.1016/0014-4886(91)90179-g" @default.
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