Presence of the Parafollicular Cells in the Thyroid Gland of the One-Humped Camel

Year 2019, Volume: 45 Issue: 2, 37 - 41, 01.05.2019

Seyed Javad AHMADPANAHI

Abstract

DOI : 10.26650/actavet.2019.18001

The thyroid is an important endocrine gland
that affects many organs of the body. A limited number of works have been done
on the morphological and histological characteristics of this gland in the
camel and controversial debates have been made on the presence of
parafollicular cells. The aim of this study is to investigate the histological
structure of the thyroid in the camel and determine the presence of
parafollicular cells in this gland. This study was performed on 20 camels. The
histological structure of the thyroid was studied using light microscope after
preparing sections and staining it with Hematoxylin & Eosin, Verhoeff, and
Toluidine blue. Thyroid gland has follicles of different sizes, follicular and
parafollicular cells, and according to our results these cells are forming
about 59.1% and 5% of the gland volume respectively. The large follicles are
located in the peripheral part of the gland while the small follicles are seen
in the central part of the gland. The central parts of the gland have a more
extensive vascular bed than the peripheral parts. This study revealed that the
thyroid gland in camel has parafollicular cells, but most of them are present
in the central part of the gland.

Cite this article as: Ahmadpanahi, S.J.,
2019. Presence of the Parafollicular Cells in the Thyroid Gland of the
One-Humped Camel. Acta Vet Eurasia 2019; DOI: 10.26650/actavet.2019.18001

Keywords

Camel, thyroid, histology, parafollicular cell

References

• 1) Abdel-Magied, E.M., Taha, A.A., Abdalla, A.B., 2000. Light and electron microscopic study of the thyroid gland of the camel (Camelus dromedarius). Anatomia Histologia Embryologia 29: 331-336. 2) Allen, A.l., Fretz, P.B., Card, C.E., Doige, C.E., 1998. The effects of partial thyroidectomy on the development of the equine fetus. Equine Veterinary Journal 30: 53-59. 3) Atoji, Y., Yamamoto, Y., Suzuki, Y., Sayed, R., 1999. Ultrastructure of the thyroid gland of the one-humped camel (Camelus dromedarius). Anatomia Histologia Embryologia 28: 23-26. 4) Bancroft, J.D., Gamble, M. 2008. Theory and Practice of Histological Techniques. 6th ed. Philadelphia, Churchill Livingstone, pp. 295-307. 5) Banks, W.J., 1993. Applied Veterinary Histology. Philadelphia, Mosby, pp. 414-424. 6) Culling, C.F., Allison, T.R. 1985. Cellular Pathology Technique. 4th ed. London, Butterworths, pp. 113- 479 7) Dyce, K.M., Sack, W.O., Wensing, C.J.G., 1996. Textbook of Veterinary Anatomy. Philadelphia, W.B. Saunders Company, pp. 211-649. 8) Fujita, H., 1975. Fine structure of the thyroid gland. International Review of Cytology. 40: 197-274. 9) Glauert, A.M., Lewis, P.R. 1998. Biological Specimen Preparation for Transmission Electron Microscopy. Vol. 17, Portland press, London. 10) Hillson, S., 2005. Teeth. Cambridge University Press, New York, pp. 223-245. 11) Hyttel, P., Sinowatz F., Vejlested, M., 2010. Essentials of Domestic Animal Embryology. Philadelphia, W.B. Saunders Elsevier, pp. 230. 12) Kausar, R., Shahid, R.U., 2006. Gross and Microscopic Anatomy of Thyroid Gland of One Humped Camel (Camelus Dromedarius). Pakistan Veterinary Journal. 26: 88-90. 13) Kurihara, H., Uchida, K., Fujita, H., 1990. Distribution of microtubules and microfilaments in the thyroid follicular cells of normal TSH-treated and hypophysectomized rats. The Histochemical Journal. 93: 335-345. 14) Manohar, M., Goetz, T.E., Saupe, B., Hutchens, E., Coney, E., 1995. Thyroid, Renal and Splanchnic circulation in horses at rest and during short-term exercise. American Journal of Veterinary Research. 56: 1356-1361. 15) Mason, R., Wilkinson, J.S., 1973. The thyroid gland. A review. Australian Veterinary Journal. 49: 44-49. 16) Mubarak, W., Sayed, R., 2005. Ultramicroscopical study on thyrocalcitonin cells in the camel (camelus dromdarius). Anatomia Histologia Embryologia. 34(s1): 35. 17) Nickel, R., Schummer, A., Seiferle, E., 1979. The Viscera of the Domestic Mammals. Berlin, Verlag Paul Parey, pp. 64-235. 18) Pousty, I., Adibmorady, M., 2003. Comparative Histology and Histotechnique. University of Tehran Press, Tehran, pp. 253-254. 19) Sisson, S., Grossman, J.D., Getty, R., 1975. The Anatomy of the Domestic Animals, Volume 1, Philadelphia, W.B. Saunders Company, pp. 150-154. 20) Solcia, E., Capella, C., Vassallo, G. 1969. Lead-Haematoxylin as a Stain for Endocrine Cells, Significance of Staining and Comparison with other Selective Methods. Histochemistry and Cell Biology. 20: 116-126. 21) SPSS., 2003. SPSS Base 12.0 user's guide. SPSS. 22) Sridharan, G., Shankar, A.A. 2012. Toluidine blue: A review of its chemistry and clinical utility. Journal of Oral and Maxillofacial Pathology. 16: 251-255. 23) Weibel, E.R. 1979. Stereological methods. Practical methods for biological morphometry. Vol. 1. Academic Press, London, pp 101-108 24) Yagil, R., Etzion, Z., Ganani, J., 1978. Camel thyroid metabolism: effect of season and dehydration. Journal of Applied Physiology. 45: 540-544.