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A comparative evaluation of six principal IgY antibody extraction methods.

Posted by on in 2016
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Ren H1Yang W1Thirumalai D1Zhang X1Schade R2 2016. Altern Lab Anim. 44(1):11-20.

1College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China.
2College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China and Institute of Virology, Charité - Universitätsmedizin Berlin, Berlin, Germany.



Egg yolk has been considered a promising source of antibodies. Our study was designed to compare six principal IgY extraction methods (water dilution, polyethylene glycol [PEG] precipitation, caprylic acid extraction, chloroform extraction, phenol extraction, and carrageenan extraction), and to assess their relative extraction efficiencies and the purity of the resulting antibodies. The results showed that the organic solvents (chloroform or phenol) minimised the lipid ratio in the egg yolk. The water dilution, PEG precipitation and caprylic acid extraction methods resulted in high yields, and antibodies purified with PEG and carrageenan exhibited high purity. Our results indicate that phenol extraction would be more suitable for preparing high concentrations of IgY for non-therapeutic usage, while the water dilution and carrageenan extraction methods would be more appropriate for use in the preparation of IgY for oral administration.

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