Ultrastructure of deer and roe-buck thyroid

Pantić, V.

doi:10.1007/bf00541010

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…This is different from other mammals such as cat, dog, rabbit and rat were they are numerous (Lupulescu & Petrovici, 1968) and in deer thyroid (Pantic, 1967) and many mammalian hibernators, but they are very rare in many primates including human thyroids (Nunez & Gershon, 1978). The role of parafollicular cells in calcium metabolism through calcitonin in most mammals studied is most likely similar in WAD goats.…”

Section: Discussionmentioning

confidence: 85%

Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

2015

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. Ultrastructure of the thyroid gland in adult West African dwarf goat (Capra hircus). Int. J. Morphol., 33(2):532-537, 2015. SUMMARY:The present study examined ultrastructure of the thyroid gland of adult West African Dwarf (WAD) goat in order to further understand the ultrastructural morphology and some of the changes in the components of the thyroid gland in goat with age. Thyroids glands obtained from fifteen adult WAD goats of different ages and sexes slaughtered at the local abattoirs were used in this study. Electron microscopic techniques were used to study the fixed tissue with emphasis on the follicular and parafollicular cells. The results showed that the ultrastructure is generally similar to that of some domestic animals. Follicular cells were cuboidal in young adult goats thyroids but were flattened in older goat thyroids of 5-7 years. These cells remarkably showed highly dilated cisternae of rough endoplasmic reticulum which decreased in frequency the older goats. Microvilli were short and sparse on the follicular cells and the number decreased in the older goats. Different sizes of apical vesicles of varying electron density were encountered that included colloid droplets, secretory vesicles and lysosome-like bodies and the appearance of these vesicles changed with age. Parafollicular cells were encountered in the basal position between follicular cells in all thyroids examined. Numerous dense cytoplasmic granules were observed and they were not apparently different from that described in several mammals.

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Section: Discussionmentioning

confidence: 85%

Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

2015

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“…Mostly one cell was observed per thyroid follicle in camel; however, the parafollicular cells were numerous in mammals such as cat, dog, rabbit, rat (Lupulescu and Petrovici, 1968) and one to two in Bakerwali goat (Dar et al, 2018). The parafollicular cells were scarce in the thyroid gland of humans (Nunez and Gershon, 1978) and deer (Pantic, 1967). The parafollicular cells played a crucial role in calcium metabolism through calcitonin as reported in W hite Fulani cattle .…”

Section: Resultsmentioning

confidence: 84%

Ultrastructural Studies on the Thyroid Gland of Dromedary Camel (Camelus dromedarius)

Singh¹,

Joshi²,

Thanvi³

et al. 2021

IJAR

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Background: The previously reported information on the ultrastructure of the thyroid gland of the camel is meager as compared to other domestic animals; thus, the present study was designed to provide the ultrastructural features of the thyroid gland in the camel. Methods: The thyroid glands were collected from naturally died sixteen camels (n=16) of both sexes from Veterinary Clinical Complex, RAJUVAS, Bikaner, Rajasthan. The transmission electron microscopy (TEM) of the thyroid gland was done at Sophisticated Analytical Instrumental Facility (SAIF), Department of Anatomy, All India Institute of Medical Sciences, New Delhi. The standard protocol of AIIMS, New Delhi, was followed for electron microscopy. Result: The thyroid gland of the camel consisted of thyroid follicles comprised of cuboidal thyroid follicular cells. The follicular cells contained a nucleus with heterochromatin concentrated marginally on the nuclear membrane and the euchromatin was well dispersed in the nucleus with well-marked nucleoli. The nucleus of the follicular cell was rounded. The apical regions of the plasma membrane in follicular cells consisted of microvilli, which were numerous, thinner and finger-like in outline. The mitochondria appeared as round, oval, rod-shaped and dumbbell-shaped. The rough endoplasmic reticulum was visible as elongated, irregular, elliptical cisterns. The Golgi complex was well marked and consisted of flattened sacs, vacuoles and small vesicles. The parafollicular cells were found in small numbers and positioned basally between two follicular cells, close to the basement membrane. It can be concluded that the ultrastructure of the thyroid gland of the camel does not differ from that of other mammalian species.

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“…Based on the results of Brown et al [36], T 4 played a synergistic role in antler initiation and growth. Pantić [37] emphasized the connection between the thyroid and the quality of antler development in roe deer, and Sempéré and Boissin [38] found that T 4 concentration increased in late fall and early winter when the antlers were growing. Apart from the above findings, based on the interpretation of Bubenik [17] and Bubenik and Bubenik [39], THs probably do not act as primary stimulators of antler growth and they are not directly involved in the antler development, rather as metabolically active hormones, they promote all growth processes including antler development and play an important role as modulators of seasonal rhythms.…”

Section: Discussionmentioning

confidence: 99%

Iodine Distribution in the Environment as a Limiting Factor for Roe Deer Antler Development

Lehoczki

Erdélyi

Sonkoly

et al. 2010

Biol Trace Elem Res

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The iodine-containing hormones produced by the thyroid gland play a role in the complex neuro-hormonal regulation of antler development. The proper function of the thyroid depends on the adequate iodine supply of the organism, which is directly related to the iodine content of food and drinking water. The purpose of this study was to explore the connection between the iodine content of the water base, which has a strong correlation with the iodine concentration of environmental components available to animals, and the antler weight of roe deer (Capreolus capreolus) shot in Hungarian hunting areas. Using a general linear model, controlling for the collective effects of other environmental factors (deer population density, harvest rate, land use, and soil fertility information), the iodine content of the water base explained 51.4% of the total variance of antler weights. The results suggest that antler weights increase with increasing iodine concentration regardless of other factors; thus, the environmental iodine distribution can be a limiting factor suppressing roe deer performance assessed here as antler weight. Further experimental studies of controlled iodine uptake are needed to define the exact physiological iodine requirements of roe deer bucks.

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Ultrastructure of deer and roe-buck thyroid

Cited by 13 publications

References 18 publications

Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

Ultrastructural Studies on the Thyroid Gland of Dromedary Camel (Camelus dromedarius)

Iodine Distribution in the Environment as a Limiting Factor for Roe Deer Antler Development

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