Role of leptin in Japanese quail development
2002
Macajova, M. | Lamosova, D. | Zeman, M. (Akademia Vied, Ivanka pri Dunaji (Slovak Republic). Ustav Biochemie a Genetiky Zivocichov)
In our study we investigated the effects of leptin administration during the embryonic development on hatching rate, posthatching growth and development of Japanese quail (Coturnix japonica). At embryonic day 5, 0.1 microg or 1 microg of recombinant mice leptin in 50 microL of phosphate buffered saline was injected into the albumen of incubating eggs. Birds from each group were weighed daily and killed at day 0, 2, 5, 7, 14, 21, 28, 35, 42, 49, and 56 of postembryonic life. Quail treated with leptin hatched earlier and expressed a higher body weight during the whole experimental period than did the control group (P0.05). Significant changes in T3 concentrations, total lipids and body weight were seen immediately after hatching and shortly before sexual maturity. Testosterone concentrations and eggs laid were higher in leptin groups than in controls. We suppose the endocrine milieu of the developing avian embryo is influenced by leptin and the administration of this hormone during embryonic life can accelerate the embryonic development of birds.
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