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Molecules 2017, 22(10), 1793; doi:10.3390/molecules22101793

The Regulatory Mechanism of MLT/MT1 Signaling on the Growth of Antler Mesenchymal Cells

1
Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2
Department of Animal Husbandry and Veterinary, Wuhan Agricultural School, Wuhan 430043, China
3
National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
*
Authors to whom correspondence should be addressed.
Received: 27 September 2017 / Revised: 17 October 2017 / Accepted: 19 October 2017 / Published: 23 October 2017
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Abstract

Melatonin (MLT) plays an important role in regulating the physiological cycle of seasonal breeding animals. Melatonin receptor I (MT1) is effectively expressed in the cambium layer of deer antler. However, the function and metabolic mechanism of MLT/MT1 signaling in the mesenchymal cells of sika deer remain to be further elucidated. In this work, we detected the effects of MLT/MT1 signaling on mesenchymal cells proliferation and the interaction between MLT/MT1 and IGF1/IGF1-R signaling. The results show that (1) deer antler mesenchymal cells actually express MT1; (2) exogenous melatonin significantly promotes mesenchymal cells proliferation, while MT1 knock-down significantly impairs the positive effects of melatonin; and (3) melatonin significantly enhanced IGF1/IGF1-R signaling, as both the expression of IGF1 and IGF-1R increased, while MT1 knock-down significantly decreased IGF1-R expression and IGF1 synthesis. In summary, these data verified that MLT/MT1 signaling plays a crucial role in antler mesenchymal proliferation, which may be mediated by IGF1/IGF1-R. View Full-Text
Keywords: sika deer; melatonin; MT1; mesenchymal cells; IGF1 sika deer; melatonin; MT1; mesenchymal cells; IGF1
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Yang, F.; He, C.; Sun, X.; Wang, J.; Luo, C.; Liu, G.; Yang, L.; Xiong, J.; Huo, L. The Regulatory Mechanism of MLT/MT1 Signaling on the Growth of Antler Mesenchymal Cells. Molecules 2017, 22, 1793.

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