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Restricted localization of ultimobranchial body remnants and parafollicular cells in the one-humped camel (Camelus dromedarius)

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Title: Restricted localization of ultimobranchial body remnants and parafollicular cells in the one-humped camel (Camelus dromedarius)
Authors: Nakamura, Teppei Browse this author
Elewa, Yaser Hosny Ali Browse this author →ORCID
Ichii, Osamu Browse this author →KAKEN DB
Hosotani, Marina Browse this author
Ghonimi, Wael A. M. Browse this author
Tatsumi, Osamu Browse this author
Nagasaki, Ken-ichi Browse this author
Kon, Yasuhiro Browse this author →KAKEN DB
Keywords: camel
thyroid gland
ultimobranchial body remnant
Issue Date: Sep-2018
Publisher: 公益社団法人 日本獣医学会
Journal Title: Journal of veterinary medical science
Volume: 80
Issue: 9
Start Page: 1368
End Page: 1372
Publisher DOI: 10.1292/jvms.18-0298
Abstract: Parafollicular cells (C-cells) exist within the thyroid glands and display different distributions within the glands among mammalian species. In the one-humped camel (Camelus dromedarius), localization of the C-cells remains under debate. We herein investigated appearance of C-cells and the remnants of the ultimobranchial body, origin of C-cells, in the thyroid glands of one-humped camels. Macroscopically, a white mass was present at one-third the length from the cranial end of the thyroid glands where the cranial thyroid artery entered. In addition, large fossae were frequently found adjacent to the white mass. Histologically, the mass was mainly composed of connective tissues, thyroid follicles, and two types of cell clusters: one was composed of cells with clear cytoplasm and the other was composed of non-keratinized epidermoid cells. The mass and the fossae contained p63-positive cells, indicating that they consisted of ultimobranchial body remnants. Calcitonin was expressed in cells with clear cytoplasm, which were localized just beneath the fossae and in the cell clusters of the white mass. C-cells also resided in both subfollicular and interfollicular spaces adjacent to the white mass, but gradually decreased toward the periphery. C-cells tended to display round shapes in the ultimobranchial body remnants and subfollicular spaces, and spindle shapes in interfollicular spaces. In conclusion, we demonstrated that the ultimobranchial body remnants were limited to the region around the entrance of cranial thyroid artery and vein, and C-cells were mainly concentrated within and around the ultimobranchial body remnants.
Rights: ©2018 The Japanese Society of Veterinary Science
Type: article
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 昆 泰寛

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