Bodyweight, locomotion, and behavioral responses of the naked mole rat (Heterocephalus glaber) to lipopolysaccharide administration.

Autor: Kisipan ML; Department of Experimental Medicine, University of Copenhagen, Copenhagen, Denmark. kisipanm@gmail.com.; Department of Veterinary Anatomy and Physiology, Egerton University, Njoro, Kenya. kisipanm@gmail.com., Ojoo RO; Department of Veterinary Anatomy and Physiology, University of Nairobi, Nairobi, Kenya., Kanui TI; Department of Agricultural Sciences, South Eastern Kenya University, Kitui, Kenya., Abelson KSP; Department of Experimental Medicine, University of Copenhagen, Copenhagen, Denmark.
Jazyk: angličtina
Zdroj: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology [J Comp Physiol A Neuroethol Sens Neural Behav Physiol] 2022 Jul; Vol. 208 (4), pp. 493-504. Date of Electronic Publication: 2022 Jun 22.
DOI: 10.1007/s00359-022-01557-y
Abstrakt: The naked mole rat has unique biologic characteristics that include atypical inflammatory responses. Lipopolysaccharide induces inflammation which triggers brain centers controlling feeding, and behavior to result in "sick animal behavior". We characterized the bodyweight, locomotor, and other behavioral responses of this rodent to lipopolysaccharide administration. Lipopolysaccharide caused weight losses, which were not prevented by TAK 242. In the open field test, lipopolysaccharide did not depress locomotion, while urination, defecation, and activity freezing were rare. The animals exhibited walling but not rearing and fast backward movements that were unaffected by lipopolysaccharide. Failure to depress locomotion suggests either a unique immunity-brain crosstalk or motor responses/centers that tolerate depressive effects of inflammation. The absence of activity freezing and rarity of urination and defecation suggests that novel environments or lipopolysaccharide do not induce anxiety, or that anxiety is expressed differently in the animal. The absence of rearing could be due to the design of the animal's locomotor apparatus while fast backward movement could be a mechanism for quick escape from threats in the tunnels of their habitat. Our results elucidate the unique biology of this rodent, which elicits interest in the animal as a model for inflammatory research, although the findings require mechanistic corroborations.
(© 2022. The Author(s).)
Databáze: MEDLINE
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