title: Effect of interleukin-1β on lipid peroxidation in emotiogenic structures of the brain in rats during acute stress.
abstract: We studied the effects of immunomodulatory cytokine interleukin-1β on lipid peroxidation in emotiogenic structures of the brain (hypothalamus, sensorimotor cortex, and amygdala) of behaviorally active and passive rats with different prognostic resistance to stress. Immobilization of animals with simultaneous electrocutaneous stimulation (1 h) served as the model of acute emotional stress. Intraperitoneal injection of IL-1β (5 μg/kg) was followed by accumulation of malonic dialdehyde (end-product of lipid peroxidation) in all structures of the brain in passive rats, as well as in the hypothalamus of active animals. As differentiated from active rats, stress exposure in passive specimens was accompanied by a selective increase in malonic dialdehyde content in the sensorimotor cortex and amygdala. Pretreatment with IL-1β prevented activation of lipid peroxidation in the studied structures of the brain in passive rats after stress exposure. Our results show the specific effect of IL-1β on free-radical processes in the hypothalamus, sensorimotor cortex, and amygdala in rats with various behavioral parameters. Regional features of lipid peroxidation in emotiogenic structures of the brain in animals with different emotional reactivity probably contribute to the existence of significant variations in the individual resistance to emotional stress.
authors.affiliation: P. K. Anokhin Institute of Normal Physiology, Russian Academy of Medical Sciences, St. Petersburg, Russia. s.pertsov@mail.ru
authors.forename: S S
authors.initials: SS
authors.lastname: Pertsov
authors.forename: E V
authors.initials: EV
authors.lastname: Koplik
authors.forename: L S
authors.initials: LS
authors.lastname: Kalinichenko
authors.forename: A S
authors.initials: AS
authors.lastname: Simbirtsev
mesh_terms: D000818:Animals; D001921:Brain / Q000033:anatomy & histology* / Q000187:drug effects*; D007155:Immunologic Factors / Q000494:pharmacology*; D053583:Interleukin-1beta / Q000494:pharmacology*; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D013315:Stress, Psychological / Q000378:metabolism* / Q000503:physiopathology
chemical_list: D007155:Immunologic Factors; D053583:Interleukin-1beta