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  • Title: Ubiquitous expression of myostatin in chicken embryonic tissues: its high expression in testis and ovary.
    Author: Kubota K, Sato F, Aramaki S, Soh T, Yamauchi N, Hattori MA.
    Journal: Comp Biochem Physiol A Mol Integr Physiol; 2007 Nov; 148(3):550-5. PubMed ID: 17707668.
    Abstract:
    The skeletal muscle of mammals is known to express myostatin (GDF-8) that acts as a potent negative regulator of skeletal muscle growth. However, the function of GDF-8 is not limited to skeletal muscle, because of its ubiquitous expression in fish. Here we investigated whether GDF-8 is expressed in various tissues including gonads during chicken embryogenesis. As revealed by RT-PCR and Western blotting, the transcript and protein for GDF-8 were detected in brain, eye, gizzard, muscle, heart, small gut, large gut, mesonephroi, testis and ovary of chicken embryos at E12, but not in liver. GDF-8 was constitutively expressed in testis and ovary as well as muscle at E6-E21, as demonstrated by in situ hybridization on section and whole-mount. Some cell population in testis, but not identified, highly expressed GDF-8. On the other hand, the medulla and germinal epithelium of ovary highly expressed it. Collectively, these results indicate that GDF-8 is ubiquitously expressed in various tissues of chicken embryos including testis and ovary through the stage of embryogenesis.
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