The Endocrine Regulation of Chicken Growth
نویسنده
چکیده
The somatotropic axis plays a key role in proliferation and differentiation of avian organs during both preand posthatching periods. This review discusses the complexity of regulation of the endocrine system for chicken development and growth by growth hormone (GH), insulin-like growth factor (IGF), and IGF binding protein (IGFBP). In addition, the thyrotropic axis, including thyrotropin-releasing hormone (TRH) and thyroid hormones (T4 and T3), is also involved in the GH-secreting pattern. In mammals, IGFI and -II are always sequestered in a 150 kDa non-covalent ternary complex. This complex consists of one molecule each of IGF-I or IGF-II, IGFBP-3 or IGFBP-5 and an acid labile subunit (ALS). Chick ALS is identified in different strains for the first time, and further investigation of the expression of ALS on developmental stage and ALS effect on IGF bioavailability may be addressed in the future. (
منابع مشابه
Cytochemical identification of endocrine thymus of chicken in relation to aging
Age related cytochemical changes of thymic endocrine cells were studied in 78 day old chicks at five day interval to age of day 60 employing a panel of cytochemical stains. Methenamine silver revealed cell morphology including cell processes distinctly while diamine silver revealed a stronger argentaffinity in these cells. The cells had greater affinity for diamine silver compared to methenamin...
متن کاملApplication of Linear Regression and Artificial NeuralNetwork for Broiler Chicken Growth Performance Prediction
This study was conducted to investigate the prediction of growth performance using linear regression and artificial neural network (ANN) in broiler chicken. Artificial neural networks (ANNs) are powerful tools for modeling systems in a wide range of applications. The ANN model with a back propagation algorithm successfully learned the relationship between the inputs of metabolizable energy (kca...
متن کاملHarmony and conformity between principles of traditional medicine and our modern findings in science of physiology
In the first international congress on traditional medicine and materia medica, an article with the title of "Matching the principles and fundamentals of traditional medicine with findings and subjects in contemporary modern medicine" was presented and publication of a book in this matter was promised. The book was published with the title of “New insight in etiology, prevention and treatment o...
متن کاملHarmony and conformity between principles of traditional medicine and our modern findings in science of physiology
In the first international congress on traditional medicine and materia medica, an article with the title of "Matching the principles and fundamentals of traditional medicine with findings and subjects in contemporary modern medicine" was presented and publication of a book in this matter was promised. The book was published with the title of “New insight in etiology, prevention and treatment o...
متن کاملDopamine- induced hypophagia is mediated via NMDA and mGlu1 receptors in chicken
Background: Feeding behavior is regulated by a complex network which interacts via diverse signals from central and peripheral tissues. It is known dopaminergic and glutamatergic systems have crucial role on food intake regulation but scarce reports exist on their interaction in appetite regulation in broilers. OBJECTIVES: The present study was designed to examine the role of glutamatergic syst...
متن کامل