Histological and immunohistochemical changes of the thyroid gland during the foetal and postnatal period of development in indigenous Large White crossbred pigs

Igbokwe, Casmir Onwuaso; Ezeasor, D. N.

doi:10.15547/bjvm.859

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…The current study observed that the tissue lining the follicles is simple cuboidal epithelial tissue, which is composed of cuboidal cells with a central spherical nucleus, and high and low simple cuboidal epithelial tissue. This is consistent with the study of the gland in wild African grusscutter [10], local female donkeys [15], local Iraqi sheep [16], white hybrid pigs [25], and other studies. When the follicle consists of high simple cuboidal epithelial tissue, the gland is hyperactive, but in the case of low cubic epithelial tissue, the gland is underactive, as the type of tissue is an indicator of the gland's activity and its functional state.…”

Section: Discussionsupporting

confidence: 93%

Morphological Description and Histological Study of Thyroid Gland in Felis catus (Linnaeus,1758)

Hammodi

Aamery

2023

IHJPAS

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The results of the current study showed that the thyroid gland in an adult domestic cat (Felis catus) is located in the neck area on both sides of the trachea at rings 1–5. The gland consists of two lobes (right and left), and it is surrounded by a capsule of connective tissue consisting of two outer and inner layers, and a layer of fatty tissue overlaps with the outer layer of the capsule. In addition, the results of this study found that the histological structure of the thyroid gland is composed of several follicles that appear in different sizes and shapes. The follicles are lined with simple cuboidal epithelial tissue and sometimes appear lined with high and low simple cuboidal epithelial tissue. The gland is histologically composed of two types of cells: epithelial cells and parafollicular cells, or calcitonin cells (C-cells), the latter being few in number compared to the epithelial cells and appearing as single cells or forming clusters in two locations: the first is between the follicular and the second is intrafollicular.

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Section: Discussionsupporting

confidence: 93%

Morphological Description and Histological Study of Thyroid Gland in Felis catus (Linnaeus,1758)

Hammodi

Aamery

2023

IHJPAS

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“…These results are in agreement with the study of the thyroid gland in Iraqi buffalo [8], gazelles and sheeps [26], guinea pigs (Guniea pigs), and albino rats [17]. On the other hand, the results of this study regarding the capsule for both animals did not agree with the findings of the study of the thyroid gland in the African giant rat [27] and white hybrid pigs [25], where it was found that the capsule is consist of a single layer of connective tissue. Furthermore, it did not agree with the study on black Bengal goat thyroid gland [28] and rabbits [29], as the capsule was found to be composed of three layers: inner layers and outer layer consisting of connective tissue and middle layer consisting of fatty and nervous tissue.…”

Section: Discussionsupporting

confidence: 79%

“…While these results differed with the study of [24] on Belarusian hedgehog, in which the size of the right lobe is similar to the size of the left lobe. The reason for the difference in size is may due to the difference in age, sex, as well as the activity of the animal depending on the functional need [13], [25]. In contrast, the color of the gland is similar to what was found in the previously mentioned studies.…”

Section: Discussionmentioning

confidence: 56%

Histological and immunohistochemical study of thyroid gland in Caucasian squirrel (Sciurus anamalus) (Gmelin, 1778) by using marker (Anti-Thyroglobulin, Code IR5090)

Hammodi¹,

Aamery²

2022

PEN

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The current study is designed to investigate the histological and immunohistochemical characteristics of the thyroid gland in adult male Sciurus anamalus. This study found that the thyroid gland of the Caucasian squirrel is located in the neck area, below the larynx, on both sides of the trachea. It has two lobes (right and left) with cylindrical shape. The histological studies revealed that the thyroid gland is surrounded by a capsule which consists of connective tissue and forming of two layers which are outer layer and inner layer, and a layer of adipose tissue appears overlapping the outer layer. The inner tissue of the gland consists of follicles with different shapes and sizes, and is lined with simple cuboidal epithelial tissue (follicular cells). Sometimes it appears in the form of high or low cuboidal epithelial tissue, in dependent on the functional activity state of the gland, and the follicles cavities are filled with colloid. In addition, there are two kinds of cells spread in the gland tissue, follicular cells and parafollicular cells, and they are fewer in number and larger in size than follicular cells and appear either singly or in the form of clusters and occupy two sites between the follicles or within the follicle. Immunologically, the results observed an immune response to thyroglobulin antibodies to detect the protein secreted by the follicular cells, which in turn secreted it to the colloid. Moreover, the immune response appeared clear in the cell membrane of the follicular cells and the colloid through the appearance of the brown color which is specific to the immune reaction.

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Comparative Histology of C Thyrocytes in Four Domestic Animal Species: Dog, Pig, Horse, and Cattle

Sokołowska

Cywińska

Puchalska

2022

Animals

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The number, morphology, and distribution of C thyrocytes within the thyroid gland vary among species; however, studies in domestic animals are limited. In this study we compared the morphology, distribution pattern, and percentage of C thyrocytes in four domestic species: dogs, pigs, horses, and cattle. Eighty thyroid glands, 20 per species, were examined. C thyrocytes were visualized immunohistochemically with anti-calcitonin rabbit polyclonal antibody alone and combined with the periodic acid Schiff method to simultaneously visualize C thyrocytes with the basement membranes of thyroid follicles. C thyrocyte morphology varied considerably between species, from oval- (dogs) and spindle-shaped (pigs) to polymorphic (cattle and horses). Bovine C thyrocytes demonstrated cytoplasmic protrusion. C thyrocytes were located intrafolliculary (all species), epifollicularly (dogs, horses, cattle), or interfolicularly (cattle). Most porcine and bovine C thyrocytes existed individually whereas canine C thyrocytes usually formed clusters. In horses, they tended to form groups of various shapes and sizes or even rims encompassing whole follicles. In all species, the number of C thyrocyte profiles increased from the periphery to the central area of the thyroid lobe. The mean total fraction of C thyrocytes in the superficial, intermediate, and central areas were as follows: 2.55%, 8.43%, and 12.48% in dogs; 3.81%, 7.66%, and 10.79% in pigs; 1.55%, 7.44%, and 8.87% in horses; and 2.62%, 10.75%, and 12.96% in cattle. No statistical differences in the total number of C thyrocyte profiles were observed among species (8.87% in dogs, 8.58% in cattle, 7.98% in pigs, and 5.83% in horses). Our results indicated that the studied species displayed their own morphological characteristics and distribution pattern of C thyrocytes; however, total numbers of C thyrocyte profiles and their localization within the thyroid lobe are comparable.

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Histological and immunohistochemical changes of the thyroid gland during the foetal and postnatal period of development in indigenous Large White crossbred pigs

Cited by 3 publications

References 27 publications

Morphological Description and Histological Study of Thyroid Gland in Felis catus (Linnaeus,1758)

Morphological Description and Histological Study of Thyroid Gland in Felis catus (Linnaeus,1758)

Histological and immunohistochemical study of thyroid gland in Caucasian squirrel (Sciurus anamalus) (Gmelin, 1778) by using marker (Anti-Thyroglobulin, Code IR5090)

Comparative Histology of C Thyrocytes in Four Domestic Animal Species: Dog, Pig, Horse, and Cattle

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