Stress-induced behaviour in adult and old rats: effects of neonatal asphyxia, body temperature and chelation of iron

• Autorzy: Rogalska J. , Caputa M. , Wentowska K. , Nowakowska A.
• Języki publikacji: EN

Abstrakty

EN

Perinatal asphyxia in mammals leads to iron accumulation in the brain, which results in delayed neurobehavioural disturbances, including impaired learning and abnormal alertness over their entire life span. The aim of this investigation was to verify our hypothesis that newborn rats, showing reduced normal body temperature, are protected against neurotoxicity of the asphyxia up to senescence. Alertness was studied in adult and old male Wistar rats after exposure to critical neonatal anoxia: (i) at physiological neonatal body temperature of 33°C, (ii) at body temperature elevated to 37°C, or (iii) at body temperature elevated to 39°C (the thermal conditions remained unchanged both during anoxia and for 2 h postanoxia). To elucidate the effect of iron-dependent postanoxic oxidative damage to the brain, half of the group (iii) was injected with deferoxamine, a chelator of iron. Postanoxic behavioural disturbances were recorded in open-field, elevated plus-maze, and sudden silence tests when the rats reached the age of 12 and 24 months. Open-field stress-induced motor activity was reduced in rats subjected to neonatal anoxia under hyperthermic conditions. In contrast, these rats were hyperactive in the plus-maze test. Both the plus-maze and sudden silence tests show reduced alertness of these rats to external stimuli signalling potential dangers. The behavioural disturbances were prevented by body temperature of 33°C and by administration of deferoxamine.

Słowa kluczowe

EN

stress-induced behaviour; rat; neonatal asphyxia; perinatal asphyxia; asphyxia; body temperature; chelation; iron accumulation; brain; neurobehavioural disturbance; senescence; deferoxamine

• Wydawca: -
• Czasopismo: Journal of Physiology and Pharmacology. Supplement
• Rocznik: 2006
• Tom: 57
• Numer: 8
• Opis fizyczny: p.17-34,fig.,ref.

Twórcy

autor

Rogalska J.

• N. Copernicus University, Gagarina 9, 87-100 Torun, Poland

autor

Caputa M.

autor

Wentowska K.

autor

Nowakowska A.