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  • Title: Role of prolactin-like protein (PRL-L) in cold-induced increase of muscle mass in chicks.
    Author: Ijiri D, Higuchi A, Saegusa A, Miura M, Matsubara T, Kanai Y, Ohtsuka A, Hirabayashi M.
    Journal: Gen Comp Endocrinol; 2013 Jun 01; 186():94-100. PubMed ID: 23523997.
    Abstract:
    This study examined the hypothesis that a novel prolactin-like protein gene (PRL-L) is involved in cold-induced growth of skeletal muscle in chicks. Six-day-old chicks (Gallus gallus domesticus) were exposed to cold at 4°C or kept warm at 30°C for 24h. Cold exposure induced significant increases in PRL-L expression that coincided with increases in the weight of the sartorius muscle, which comprises both fast- and slow-twitch fibers. Meanwhile, no induction of PRL-L mRNA was observed in the heart, liver, kidney, brain, or fat. Myoblast cells that expressed PRL-L mRNA grew faster than untransduced cells in media containing 2% serum. These results suggested that PRL-L might be involved in in controlling cold-induced muscle growth of chicks.
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