During the breeding season, lymphocytes assemble into ellipse-shaped clusters in the uropygial gland of the jungle crow Corvus macrorhynchos.

Autor: Hirao AJ; Basic Science Related to Nursing, School of Nursing, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan. Electronic address: jhirao@jichi.ac.jp., Aoyama M; Department of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Minemachi, Utsunomiya, Tochigi 321-8505, Japan., Sugita S; Department of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Minemachi, Utsunomiya, Tochigi 321-8505, Japan.
Jazyk: angličtina
Zdroj: Morphologie : bulletin de l'Association des anatomistes [Morphologie] 2024 Dec 06; Vol. 109 (364), pp. 100924. Date of Electronic Publication: 2024 Dec 06.
DOI: 10.1016/j.morpho.2024.100924
Abstrakt: Background: Recent studies indicate that the uropygial gland produces intraspecific chemosensory cues. The jungle crow Corvus macrorhynchos, which is a type of passerine, exhibits extreme morphological variation in the gonadal gland during the breeding season. Because the uropygial gland of the jungle crow sometimes exhibits morphological changes during the breeding season, we attempted to clarify the morphological changes in the uropygial gland of the jungle crow according to development and season.
Methods: Captured birds were divided into three age groups according to the color of their upper palate: <1 year, 1-2 years, and >2 years old. Paraffin sections of the uropygial gland were stained with hematoxylin and eosin, Elastica van Gieson, Giemsa, and a proliferating cell nuclear antigen antibody.
Results: Sexual dimorphism was not seen in the morphology of the uropygial gland in the jungle crow. However, changes due to growth and season were identified. During the breeding season in birds>2 years old, lymphocytes formed ellipse-shaped clusters around the glandular cavity. These clusters were invaded by collagen fibers from spherical cells.
Conclusions: Collagen fibers, which develop from spherical cells, seem to be related to lymphoid cluster migration. Ellipse-shaped lymphoid clusters may play a crucial role in reproductive behavior during the breeding season.
(Copyright © 2024 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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