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Chronobiological studies of chicken IgY: Monitoring of infradian, circadian and ultradian rhythms of IgY in blood and yolk of chickens.

Posted by on in 2014
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He JX1Thirumalai D1Schade R2Zhang XY3. 2014. Vet Immunol Immunopathol. 160(3-4):266-72. doi: 10.1016/j.vetimm.2014.05.016. Epub 2014 Jun 7.

 

Abstract

IgY is the functional equivalent of mammalian IgG found in birds, reptiles and amphibians. Many of its biological aspects have been explored with different approaches. In order to evaluate the rhythmicity of serum and yolk IgY, four chickens were examined and reared under the same conditions. To monitor biological oscillations of IgY in yolk and serum, the eggs and blood samples were collected over a 60 day period and the rhythm of yolk and serum IgY was determined by direct-ELISA. Results indicated that, there is a significant circaseptan rhythm in yolk IgY and circaquattran rhythm in serum IgY. The serum IgY concentration reached a peak in the morning, decreased to a minimum during the daytime and increased again at night revealing a significant circadian rhythm was superimposed by an ultradian rhythm. These data are suited to address the controversies concerning the IgY concentration in egg yolk and blood of laying hens. In addition, this study raised new questions, if the different rhythms in yolk and serum are concerned.

Copyright © 2014 Elsevier B.V. All rights reserved.

KEYWORDS:

Chicken; Circadian rhythm; Serum IgY; Yolk IgY

PMID:
 
24998020
 
[PubMed - in process]
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