PMID: 3770270Jan 1, 1986Paper

Relationship between circulating thyroid hormones and humoral immunity in immature male chickens

Developmental and Comparative Immunology
S E Bachman, M M Mashaly

Abstract

The objective of this experiment was to examine the relationship between levels of circulating T3, T4, and humoral immunity in immature male chickens. Three week old Single Comb White Leghorn male chicks were used as the experimental animals. In order to produce a wide range of circulating thyroid hormone concentrations, birds were divided into groups and received one of nine treatments including surgical thyroidectomy; 0.1% propylthiouracil (PTU) in the feed; 1 ppm T3 and 10 ppm T4 in the feed. Antibody production against sheep red blood cells (SRBC) (thymus-dependent antigen) and Brucella abortus (BA) (thymus-independent antigen) was tested at 6 weeks of age. Concentrations of T3 and T4 were measured in birds from each treatment group at 7 and 11 weeks of age. At 11 weeks of age, birds were weighed, sacrificed and lymphoid organs removed and weighed. There were positive correlations between circulating thyroid hormones and weights of bursa of Fabricius and spleens. There were no significant correlations between circulating thyroid hormones and antibody production. It was concluded that physiological levels of thyroid hormones are needed to maintain normal weights of bursa and spleen. Furthermore, we conclude that lower than p...Continue Reading

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Citations

Sep 1, 1992·Pharmacology, Biochemistry, and Behavior·M Freire-GarabalM J Núñez
Jan 1, 1987·Developmental and Comparative Immunology·S E Bachman, M M Mashaly
Jan 1, 1987·Developmental and Comparative Immunology·G F Erf, J A Marsh
Jan 1, 1988·Developmental and Comparative Immunology·O KaiK Sato
Jan 1, 1990·Developmental and Comparative Immunology·R A WilliamsonL N Payne
Sep 25, 2002·General and Comparative Endocrinology·Serge Van der GeytenVeerle M Darras
Jan 1, 2008·The Veterinary Clinics of North America. Exotic Animal Practice·Robert E Schmidt, Drury R Reavill

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