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Silencing Pax3 by shRNA inhibits the proliferation and differentiation of duck (Anas platyrhynchos) myoblasts

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Abstract

The Pax3 gene has been proven to play a crucial role in determining myogenic progenitor cell fate during embryonic myogenesis; however, the molecular role of Pax3 in myoblast development during later stages of myogenesis is unknown. We hypothesized that Pax3 would function in myoblast proliferation and differentiation; therefore, we employed three short hairpin RNAs (shRNAs) (shRNA1, shRNA2, and shRNA3) that target Pax3 to characterize the function of Pax3 in duck myoblast development. The mRNA and protein expression levels of Pax3 in duck myoblasts were detected using real-time PCR and Western blotting. Cell proliferation was assessed using the MTT and BrdU assays, while cell differentiation was assayed using immunofluorescence labeling with a MyoG antibody. Additionally, folic acid (FA), which is a rescue tool, was added into the medium of duck myoblasts to indirectly examine the function of Pax3 on duck myoblast proliferation and differentiation. The results revealed that one of the shRNA vectors, shRNA1, could significantly and stably reduce the expression of Pax3 (P < 0.05). Silencing Pax3 by shRNA1 significantly reduced the proliferation and differentiation of duck myoblasts (P < 0.05) due to downregulated expression of myogenic regulator factors. These trends could be rescued by adding FA; and Pax7, a paralog gene of Pax3, was involved in those processes. Overall, Pax3 had a positive function in duck myoblast proliferation and differentiation by modulating the expression of myogenic regulation factors, and shRNA targeting of Pax3 might be a new approach for understanding the function of Pax3 in the development of diverse tissues.

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Acknowledgments

This work was supported by the Chinese Agriculture Research Service (No.CARS-43-6) and the Breeding of Multiple Crossbreeding System in waterfowl (2011NZ0099-8).

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Authors and Affiliations

  1. Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Ya’an, 625014, China

    Rong-Ping Zhang, He-He Liu, Hao-Han Wang, Yan Wang, Chun-Chun Han, Liang Li, Hua He, Heng-Yong Xu, Feng Xu & Ji-Wen Wang

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  1. Rong-Ping Zhang
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  2. He-He Liu
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Correspondence to Ji-Wen Wang.

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Zhang, RP., Liu, HH., Wang, HH. et al. Silencing Pax3 by shRNA inhibits the proliferation and differentiation of duck (Anas platyrhynchos) myoblasts. Mol Cell Biochem 386, 211–222 (2014). https://doi.org/10.1007/s11010-013-1859-4

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  • DOI: https://doi.org/10.1007/s11010-013-1859-4

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