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Effects of age and jet lag on d-galactose induced aging process

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Abstract

Chronic administration of d-galactose (d-gal) is a useful method for establishing a model of natural aging. However, whether animal age or jet lag influences the d-gal-induced aging process has not been investigated. To clarify these issues, ICR male mice were given a daily injection of d-gal (500 mg/kg bw) for 7 wks. d-gal-treatment caused a significant decrease only in the transcript level of Cat gene in the 6-wk-old mice, whereas it significantly reduced the expression of Cat and Sod1 genes and of Cat, Gpx1, Sod1 and Sod2 genes in the 12- and 22-wk-old group, respectively, suggesting that d-gal induced aging process was greatly dependent on the age of mice. Mice receiving both d-gal and jet lag exhibited larger decreases in the expression levels of above four genes in liver as compared with that of either group singly, indicating a synergistic effect of jet lag and d-gal on the aging process.

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Abbreviations

d-gal:

d-galactose

RT-PCR:

Reverse transcription-polymerase chain reaction

T-AOC:

Total antioxidant capabilities

ROS:

Reactive oxygen species

Galk :

Galactokinase gene

Galt :

Galactose-1-phosphate uridyltransferase gene

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Acknowledgments

This study was supported by the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT 0653), Science Foundation of Zhejiang Province, China (No. 2004C14003), and Natural Science Foundation of Zhejiang Province for Distinguished Young Students (No. 2007R40G2020043).

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Correspondence to Zhengwei Fu.

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Xu, Y., Wu, T., Jin, Y. et al. Effects of age and jet lag on d-galactose induced aging process. Biogerontology 10, 153–161 (2009). https://doi.org/10.1007/s10522-008-9158-2

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  • DOI: https://doi.org/10.1007/s10522-008-9158-2

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