Variation of food availability affects male striped hamsters (Cricetulus barabensis) with different levels of metabolic rate

Integrative Zoology
Jing WenZhi-Jun Zhao

Abstract

In the present study, we examined metabolic, morphological and neurochemical changes in male striped hamsters (Cricetulus barabensis) in response to variations in food availability. Males with low and high levels of metabolic rate (MR: L-MR and H-MR, respectively), defined by their activity MR, were compared. In Experiment 1, 36-h food deprivation was found to significantly decrease MR levels, body fat content, mass of small and large intestines, and leptin gene expression in the white adipose tissues in male hamsters. Interestingly, L-MR males displayed decreased MR during both the day and night phases of circadian cycles, whereas H-MR males only showed a decrease in MR during the day (resting phase). These data indicate that individual differences in physical activity were associated with animals' different metabolic responses to food deprivation. In Experiment 2, both groups of males went through a 4-week fasting and re-feeding (re) paradigm. H-re males showed a persistent high level of MR, with decreased body fat content and a trending decrease in leptin mRNA expression, compared to L-re males. Together, our data indicate that male striped hamsters with different levels of physical activity display altered, adaptive changes...Continue Reading

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Citations

Sep 27, 2018·Integrative Zoology·Mohamed Kabbaj, Zuoxin Wang
Apr 22, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Jing WenZhi-Jun Zhao
Jan 4, 2019·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Jing WenJin-Song Liu

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