Scientia Agricultura Sinica ›› 2017, Vol. 50 ›› Issue (6): 1139-1146.doi: 10.3864/j.issn.0578-1752.2017.06.014

• ANIMAL SCIENCE·VETERINARY SCIENCERE·SOURCE INSECT • Previous Articles     Next Articles

Effect of EDN3 on of Sheep Skin Melanocytes with Different Coat Colors in Vitro

LI YaNan, ZHAO BingLing, WANG HaiDong, CHEN TianZhi, LIU Ying, CHANG LuCheng, DONG ChangSheng   

  1. College of Animal Science and Veterinary Medicine, Taigu 030801, Shanxi
  • Received:2016-03-01 Online:2017-03-16 Published:2017-03-16

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Abstract: 【Objective】 The objective of this study is to explore the effects of EDN3 in vitro on sheep melanocytes with different coat colors and to find the mechanisms of production of melanin and their differences. 【Method】 Melanocytes from black and white coat colors were cultured in vitro, and MTT assay was used to detect different cell proliferation rates by affected EDN3. After extraction of total RNA and total protein of both cells, the total RNA was reversely transcribed to cDNA, and then the effect of EDN3 on mRNA relative expression of EDNRB, NRas and TYR was analyzed by RT-PCR, and Western blot was performed to ensure whether EDN3 had influence on the protein expression of EDNRB, NRas and TYR. Significant difference was analyzed by using statistical method with software SPSS19.0. 【Result】 MTT assay showed that EDN3 promoted cells proliferation from both black and white coat colors. RT-PCR revealed that compared with the control group, the relative expressions of EDNRB and NRas mRMA in EDN3 group from white coat color were significantly increased by 1.7992 folds and 1.8536 folds respectively (P<0.01), while TRY mRNA had no significant difference. In cells from black coat color, the expressions of EDNRB, NRas and TYR were all induced significantly with multiples of 2.2512, 1.3859 and 15.5710 respectively (P<0.01). The result of Western blot in EDN3 group was consistent with RT-PCR, the EDNRB protein expression from white coat color was 3.0827 times of control group (P<0.01), and the NRas protein expression was 1.2936 fold of control group (P<0.05), while TYR had no change. The protein expressions in cells from black coat color of EDNRB, NRas and TYR were observably added up to 3.9800 time (P<0.01), 1.3658 and 1.8498 times (P<0.05), respectively. 【Conclusion】 EDN3 promoted melanocytes proliferation from both black and white coat colors, while had no effect on TYR which is a rate-limiting enzyme of pigment synthesis in cells from white coat colors, and might play a role in producing melanin in cells isolated from black coat color.

Key words: EDN3, sheep, coat color, melanocytes

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