Abstract
This study performed a comprehensive expression profiling of genes expressed in the skin of goats with three different coat colors by Illumina Sequencing. A total of 91 significantly expressed genes were detected when comparing gray skin to white skin library and these included 74 up-regulated and 17 down-regulated genes in gray skin. There were 67 differentially expressed genes between brown skin and white skin libraries, 23 of which were up-regulated and 44 were down-regulated in brown skin. When we compared brown and gray libraries, 154 differentially expressed genes were found, of which 33 showed higher expression and 121 showed lower expression in brown skin. To our surprise, MC1R, MITF, TYR and KIT showed no significant difference in expression between the goats with three skin colors, whereas ASIP was detected in white skin but not in dark skins. In this study, PMEL, TRPM1, TYRP1 and DCT were significantly up-regulated in brown goat skin compare with gray and white skins. PMEL showed higher expression in gray goat skin compared with white goat skin, whereas there were no significant differences in the expression of TYRP1, TRPM1 and DCT between gray and white skin samples. In addition, ELOVL3 showed higher expression in gray goat skin than in brown and white skins, whereas there was no significant differences in the expression of ELOVL3 between brown and white skin samples. These results expand our understanding of the complex molecular mechanisms of skin physiology and melanogenesis in goat and provide a foundation for future studies.
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Acknowledgements
We are grateful to members of our laboratories for critical reading of the manuscript and helpful discussion. This work was supported by the National Natural Science Foundation of China (Nos. 31172196, 31501940), the Applied Basic Research Programs of Hebei Province (No. 15962901D), College Innovation Team Leader Training Programme of Hebei Province (No. LJRC004), Program for the Top Young-aged Innovative Talents of Higher Learning Institutions of Hebei Province (No. BJ2016026), the Science and Technology Pillar Program of Qinhuangdao (No. 201502A058) and PhD Research Start Fund of Hebei Normal University of Science and Technology (2014). We kindly thank members from Novogene Bioinformatics Institute for their assistance with original data processing and related bioinformatic analysis.
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Yongdong Peng and Xianglong Li conceived and designed the experiments; Xiaohui Liu, Liying Geng, Zhengzhu Liu and Yuanfang Gong performed the experiments; Yongdong Peng, Ruxue Ma and Chuansheng Zhang analyzed the data; Lisha Li and Jingshi Li contributed reagents/materials/analysis tools; Yongdong Peng and Xianglong Li contributed to write the manuscript.
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Yongdong Peng, Xiaohui Liu, Liying Geng, Ruxue Ma, Lisha Li, Jingshi Li, Chuansheng Zhang, Zhengzhu Liu, Yuanfang Gong and Xianglong Li declare that they have no conflict of interest.
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This article does not contain any studies with human participants or animals performed by any of the authors. All animal experiments were reviewed and approved by the Institutional Animal Care and Use Committee of Hebei Normal University of Science and Technology, China. Procedures were performed in accordance with the Regulations for the Administration of Affairs Concerning Experimental Animals (The State Council of the People’s Republic of China, 2011).
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Peng, Y., Liu, X., Geng, L. et al. Illumina-sequencing based transcriptome study of coat color phenotypes in domestic goats. Genes Genom 39, 817–830 (2017). https://doi.org/10.1007/s13258-017-0543-6
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DOI: https://doi.org/10.1007/s13258-017-0543-6