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Published on: May 30, 2025
S-100 immunoreactive cells in non-nervous duck tissues
M Sugimura1, M Miura, Y Suzuki
1Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
Avian Pathology : Journal of the W.V.P.A
|July 1, 1989
Summary
S-100 protein, a marker, was found in various duck cells, including endocrine and epithelial tissues. These S-100 protein-positive cells differ significantly from those observed in mammalian species.
Area of Science:
- Comparative immunology
- Cell biology
- Avian physiology
Background:
- S-100 protein is a calcium-binding protein found in various mammalian tissues.
- Its presence and function in avian species, particularly ducks, are not well-characterized.
- Understanding S-100 protein distribution can offer insights into cellular differentiation and function in birds.
Purpose of the Study:
- To investigate the distribution and cellular localization of S-100 protein in different tissues of the duck.
- To compare the S-100 protein expression patterns in ducks with those reported in mammalian species.
Main Methods:
- Immunohistochemistry was employed to detect S-100 protein.
- Tissue samples from various organs of the duck were analyzed.
Main Results:
- S-100 protein was detected in endocrine cells of the islet of Langerhans, hypophysis, ultimobranchial body, proventriculus, gizzard, and intestine.
- Epithelial cells of the interlobular bile duct, gall bladder, renal tubules, and epididymal and urinary ducts also showed S-100 protein immunoreactivity.
- Sertoli cells and oocytes were also found to be S-100 protein-positive.
- Nerve elements in the duck did not exhibit S-100 protein immunoreactivity.
- The identified S-100 protein-positive cell types in ducks differ from those in mammalian species.
Conclusions:
- S-100 protein is expressed in a diverse range of non-neuronal cells in ducks, including endocrine, epithelial, Sertoli cells, and oocytes.
- The distinct distribution pattern of S-100 protein in ducks suggests species-specific roles or evolutionary divergence compared to mammals.
- Further research is warranted to elucidate the specific functions of S-100 protein in these avian cell types.
