title: In ovo exposure to monochromatic lights affect posthatch muscle growth and satellite cell proliferation of chicks: role of IGF-1.
abstract: To study the role of IGF-1 on stimulation with monochromatic light during incubation altering posthatch muscle growth, chicken embryos were exposed to blue light, green light, red light, white light or darkness throughout embryonic period and then were raised in white light conditions upon hatching. Comparing with the other treatment groups, the chicks in green light group had heavier hatching weights, higher muscle indexes and larger muscle fibers. Both in vivo and in vitro studies showed that the number and proliferative activity of satellite cells in green light group were the highest. Plasma IGF-1 level and skeletal muscle IGF-1R mRNA level were higher in green light group. Moreover, exogenous IGF-1 increased the proliferative activity of satellite cell in a dose-dependent fashion. These results suggest that stimulation with monochromatic green light during incubation promoted posthatch muscle growth and satellite cell proliferation of chicks through IGF-1 signaling.
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Xinjie
authors.initials: X
authors.lastname: Bai
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Zixu
authors.initials: Z
authors.lastname: Wang
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Jing
authors.initials: J
authors.lastname: Cao
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Yulan
authors.initials: Y
authors.lastname: Dong
authors.affiliation: a Laboratory of Anatomy of Domestic Animals , College of Animal Medicine, China Agricultural University , Haidian , Beijing , China.
authors.forename: Yaoxing
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000818:Animals; D049109:Cell Proliferation / Q000528:radiation effects*; D002642:Chick Embryo; D002645:Chickens; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D008027:Light; D024510:Muscle Development / Q000528:radiation effects*; D017526:Receptor, IGF Type 1 / Q000378:metabolism; D032496:Satellite Cells, Skeletal Muscle / Q000378:metabolism / Q000502:physiology / Q000528:radiation effects*; D015398:Signal Transduction
chemical_list: D007334:Insulin-Like Growth Factor I; D017526:Receptor, IGF Type 1
keywords: IGF-1; chicken embryo; in ovo; monochromatic light; muscle growth; satellite cell