Consulta: subjectFacets:"Thyroid gland"
Registros recuperados: 6
Data/hora: 13/06/2024 07:19:14

Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
Provedor de dados: International Journal of Morphology
Autores: Igbokwe,Casmir Onwuaso; Ezeasor,Daniel Nwagbo; Umar,Mohammed Bello.
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 5­7 years. These cells remarkably showed highly...
Tipo: Journal article
Palavras-chave: Ultrastructure; Thyroid gland; Dwarf goat.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200020

Benign Inclusions in Lymph Nodes
Provedor de dados: International Journal of Morphology
Autores: Spinardi,Julia Regazzini; Goncalves,Isis  Rocha Dias; La Falce,Thiago Souza; Fregnani,José Humberto Tavares Guerreiro; Barros,Mirna Duarte; Macea,José Rafael.
Benign inclusions are foci of non-neoplastic ectopic tissue in lymph nodes. They are classified into three types: epithelial, nevomelanocytic and decidual. It is important to identify them for the differential diagnosis with lymph node metastases, particularly among patients who present proliferative benign lesions. In general, epithelial inclusions are presented inside lymph nodes as epithelial cysts or as numerous structures resembling ducts. The cells of these structures may originate from the cells of paramesonephricus ducts, salivary glands, breast tissue, thyroid follicles, squamous epithelium or mesothelium. Paramesonephricus -type inclusions are almost exclusively found in pelvic lymph nodes and, in appearance, they resemble the epithelium of the...
Tipo: Journal article
Palavras-chave: Ectopic tissues; Lymph node; Melanocyte; Paramesonephricus ducts; Thyroid gland; Breast.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000300026

The Effect of Humic Acid Substances on the Thyroid Function and Structure in Lead Poisoning
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Sahin,A; Iskender,H; Terim,Kapakin KA; Altinkaynak,K; Hayirli,A; Gonultas,A; Kaynar,O.
ABSTRACT Lead (Pb) is a heavy metal, which adversely affects thyroid gland function and structure. Due to its high molecular weight and abundant functional groups, humic acid substances (HAS) can form chelates with heavy metals. The experiment was conducted to evaluate the prophylactic effect of HAS on thyroid hormone levels and histopathological lesions of laying hens exposed to lead (Pb) poisoning. After a week of adaptation, 192 Lohmann White laying hens (25 weeks of age) were fed one of four diets: a basal diet (BD) or the BD with HAS (0.15%), with Pb (0.3 g/kg), or with both. Experimental groups were replicated in 12 cages, with four hens each. Pb poisoning did not alter triiodothyronine (FT3; 3.22 ± 0.20 ng/dL) or thyroxine (FT4; 0.71 ± 0.08 ng/dL)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lead poisoning; Humic acid substances; Thyroid gland; Chicken.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400649

Growth performance, morphometric analysis of the intestinal mucosa and thyroid of broiler fed canola meal
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Moraes,P.O.; Novelini,L.; Krabbe,E.L.; Kawski,V.L.; Nunes,J.K.; Corcini,C.D.; Varella,A.S.; Xavier,E.G.
ABSTRACT The aim of this study was to evaluate the effect of replacing soybean meal with canola meal in broiler diets on performance, liver histopathology, morphometry of the intestinal mucosa and thyroid. One-day-old Cobb chicks (n=300) were distributed in a completely randomized design, with increasing levels of replacement of soybean meal with canola meal (0, 25, 50, 75 and 100%) and 6 repetitions of 10 birds each. Weight gain decreased linearly (P&lt; 0.05) with increasing levels of inclusion of canola meal, in all stages. Villus height in the duodenum and jejunum linearly decreased (P&lt; 0.05). Follicle diameter and thyroid follicular epithelium height increased linearly with increasing levels of canola meal (P&lt; 0.05). Similarly, there was an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Poultry; Proteins; Thyroid gland.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100187

131I-induced changes in rat thyroid gland function
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Torlak,V.; Zemunik,T.; Modun,D.; Capkun,V.; Pesutic-Pisac,V.; Markotic,A.; Pavela-Vrancic,M.; Stanicic,A.
Therapeutic doses of 131I administered to thyrotoxic patients may cause thyroid failure. The present study used a rat model to determine thyroid function after the administration of different doses of 131I (64-277 µCi). Thirty male Fisher rats in the experimental group and 30 in the control group (untreated) were followed for 6 months. The animals were 4 months old at the beginning of the experiment and were sacrificed at an age of 9 months. Hormone concentration was determined before 131I administration (4-month-old animals) and three times following 131I administration, when the animals were 7, 8, and 9 months old. The thyroid glands were removed and weighed, their volume was determined and histopathological examination was performed at the end of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thyroid gland; 131I; Hormones; Histopathology; T3; T4; TSH.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000800009

Ultrasonographic determination of goiter prevalence in southern Brazilian schoolchildren
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Lisbôa,H.R.K.; Gross,J.L.
The aim of the present study was to estimate the prevalence of goiter in schoolchildren in a formerly iodine-deficient region in southern Brazil by assessing the relationship between body surface area (m²) and thyroid volume (ml) measured by ultrasonography. A population-based sample of 1,094 randomly selected schoolchildren (6 to 14 years; 556 boys and 538 girls) underwent clinical evaluation. A total of 119 (10.9%) children were diagnosed with goiter upon clinical examination according to WHO criteria (grade Ia: 65, grade Ib: 24, grade II: 29, grade III: 1). Of these, 85 underwent ultrasonography. In order to ascertain the absence of goiter in the 975 schoolchildren with a negative result upon clinical examination, one of ten children was randomly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Goiter; Prevalence; Thyroid gland; Ultrasonography.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002001000006