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Animals 2019, 9(3), 92; https://doi.org/10.3390/ani9030092

Genome-Wide Microarray Analysis Suggests Transcriptomic Response May Not Play a Major Role in High- to Low-Altitude Acclimation in Harvest Mouse (Micromys minutus)

1
Department of Life Science, Tunghai University, Taichung 40704, Taiwan
2
Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua 50006, Taiwan
3
Department of Genomic Medicine and Center for Medical Genetics, Changhua Christian Hospital, Changhua 50046, Taiwan
4
Department of Genomic Science and Technology, Changhua Christian Hospital Healthcare System, Changhua Christian Hospital, Changhua 50046, Taiwan
5
Department of Medical Laboratory Science and Biotechnology, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan
6
Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan
7
Division of Biostatistics & Bioinformatics, Institute of Population Health Sciences, National Health Research Institutes, Zhunan, Miaoli County 35053, Taiwan
8
Department of Obstetrics and Gynecology, College of Medicine, National Taiwan University, Taipei 10041, Taiwan
9
Department of Medical Genetics, National Taiwan University Hospital, Taipei 10041, Taiwan
10
Department of Molecular Biotechnology, Da-Yeh University, Changhua 51591, Taiwan
*
Authors to whom correspondence should be addressed.
Received: 25 February 2019 / Revised: 9 March 2019 / Accepted: 10 March 2019 / Published: 13 March 2019
(This article belongs to the Section Animal Genetics and Genomics)
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Simple Summary

Micromys minutus is a small rodent species that has a wide range of vertical distribution in Taiwan. By comparing the gene expression profile of the skeletal muscle tissues taken from individuals native to the high-altitude environment and those transferred to the low-altitude captive site, the Tnfrsf12a gene was demonstrated to have a differential expression pattern. Although this finding may be correlated with the altitude acclimation, the observation of only one gene transcript with significant alteration leads us to suggest that genetic response may not play a major role in altitude acclimation in M. minutus. Future comparative functional genomics studies involving other organ systems (in addition to skeletal muscles) and alarger sample size are warranted for better insight into the altitude acclimation of this small rodent species.

Abstract

The harvest mouse (Micromys minutus) is a small rodent species with a wide range of vertical distribution in Taiwan, extending from the sea level to 3100 m altitude. This species has recently suffered from habitat loss in high-altitude areas due to orchard cultivation, which may have resulted in mouse migration from high to low altitude. To investigate whether there is any physiological mechanism involved in altitude acclimation, rat cDNA microarray was used to compare transcriptomic patterns of the skeletal muscle tissues taken from individuals native to the high-altitude environment and those transferred to the low-altitude captive site. Of the 23,188 genes being analyzed, 47 (33 up-regulated and 14 down-regulated) were found to have differential expression (fold change > 4 or < −4, ANOVA p < 0.05). However, after multiple testing correction with a false discovery rate (FDR), only the result for Tnfrsf12a was found to be statistically significant (fold change = 13, FDR p < 0.05). The result was confirmed by quantitative polymerase chain reaction (q-PCR). The expression of Tnfrsf12a possibly relates to the skeletal muscle biology and thus can be correlated with altitude acclimation. However, finding only one gene transcript with significant alteration suggests that transcriptomic response may not play a major role in high- to low-altitude acclimation in harvest mouse. View Full-Text
Keywords: gene expression; cDNA; acclimation; microarray; functional genomics; behavior gene expression; cDNA; acclimation; microarray; functional genomics; behavior
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Chen, T.-H.; Ma, G.-C.; Lin, W.-H.; Lee, D.-J.; Wu, S.-H.; Liao, B.-Y.; Chen, M.; Lin, L.-K. Genome-Wide Microarray Analysis Suggests Transcriptomic Response May Not Play a Major Role in High- to Low-Altitude Acclimation in Harvest Mouse (Micromys minutus). Animals 2019, 9, 92.

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