10 results on '"Hormônios tireoidianos"'
Search Results
2. HIPOTIREOIDISMO EM INDIVÍDUOS IDOSOS: REVISÃO DE LITERATURA.
- Author
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PINTO LOUREDO, NAYARA, LIBÓRIO DOS SANTOS VILLAS BOAS, POLIANA, SOARES TAVARES, SARA, RUFINO FERNANDES, WARLEY CLEITON, and SAMPAIO MOTA SOUZA, CRISTIANA
- Abstract
Introduction: Hypothyroidism is one of the most frequent endocrine disorders. It occurs when the thyroid gland does not produce enough hormones. It is a common disease in patients over 60 years of age. Objectives: To describe the prevalence of hypothyroidism in the elderly and the impact of this disease. Method: Literature review through bibliographic research of platforms such as SciELO and PubMed. Development: The hormones produced by the thyroid gland, triiodothyronine (T3) and thyroxine (T4), have an impact on health, affecting metabolism. They influence the control of vital functions, such as body temperature and heart rate. The clinical manifestation is nonspecific, and this characteristic is even more evident in elderly patients. Symptoms and signs can include weight gain, drowsiness, dry skin and constipation, but the lack of these symptoms does not rule out the diagnosis. This is based on your symptoms and the results of laboratory tests that measure TSH and T4 levels. Standard treatment involves daily use of thyroid hormone levothyroxine Conclusion: Careful evaluation of thyroid function test results and management is required. of this disease. Interest has increased with the recognition that thyroid deficiency may be related to disability, altered cognitive function, risk of cardiovascular disease and longevity. [ABSTRACT FROM AUTHOR]
- Published
- 2021
3. EFEITOS DO HIPOTIREOIDISMO SOBRE A REPARAÇÃO TECIDUAL.
- Author
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Medeiros Neto, Lázaro Pinto, Martin, Airton Abrahao, and Loschiavo Arisawa, Emília Angela
- Abstract
Hypothyroidism, a disease characterized by changes in the production of thyroid hormones, can interfere in the wound healing process of various organs and tissues. This occurs because the hormones triiodothyronine (T3), thyroxine (T4) and thyrotropin (TSH) act directly on cellular metabolism, regulating energy generation processes, protein synthesis, which directly affects cell proliferation and survival. Thus, the aim of this study was to relate the main effects of hypothyroidism on the tissue repair process in various organs and tissues. A search for articles was conducted at the platforms: PubMed, Scielo and CAPES Portal. The terms used were "hipotireoidismo", "reparação tecidual", "hypothyroidism" and "tissue repair", with the date of publication from 2008 to the present. Among the 35 articles found, 14 were selected for fitting the theme. Hypothyroidism, classified as a systemic disease, acts widely on various tissues of our body, directly affecting the tissue repair process, hampering wound closure, cell regeneration process, reperfusion, presenting a difficulty in the formation of granulation tissue, among other damages, such as the decrease in the amount of collagen at the site of the lesion, besides decreasing the capacity of bone mineralization. Therefore, it is very important that the therapy for replacement of these hormones in patients with hypothyroidism be performed effectively, avoiding the deleterious effects on the body. [ABSTRACT FROM AUTHOR]
- Published
- 2017
4. Down Syndrome, thyroid dysfunction and motor development: clinical study
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Couto, Marília de Medeiros [UNESP], Universidade Estadual Paulista (Unesp), and Fonseca, Cátia Regina Branco da [UNESP]
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Motor ability ,Hypothyroidism ,Crianças ,Síndrome de Down ,Pré-escolares ,Down Syndrome ,Tireóide Doenças ,Children ,Hormônios tireoidianos ,Capacidade motora - Abstract
Submitted by MARILIA DE MEDEIROS COUTO (mariliamedeiroscouto@yahoo.com.br) on 2020-08-20T17:46:01Z No. of bitstreams: 1 Dissertação_Marília_Couto_Meparem_Jul20.pdf: 1945131 bytes, checksum: 123c11aeb6b727ad1f825be4d6cf542e (MD5) Rejected by ROSANGELA APARECIDA LOBO null (rosangelalobo@btu.unesp.br), reason: Solicitamos que realize uma nova submissão seguindo as orientações abaixo: problema 1: capa As informações colocadas devem estar na cor verde. Sugiro que veja os modelos de capa dos trabalhos defendidos em seu programa de pós e/ou verifique os critérios para a elaboração de dissertações desse programa. problema 2:: Financiamento Fapesp No formulário de submissão consta a FAPESP como agência financiadora do seu projeto. No arquivo submetido não localizei um agradecimento a esta. Caso tenha recebido o apoio é necessário que se faça um agradecimento, informando também no agradecimento o número de processo. Lembrando que esse agradecimento é uma exigência das agências de fomento, em especial da FAPESP. Assim que tiver efetuado as correções submeta o arquivo, em formato PDF, novamente. Agradecemos a compreensão. on 2020-08-21T20:11:16Z (GMT) Submitted by MARILIA DE MEDEIROS COUTO (mariliamedeiroscouto@yahoo.com.br) on 2020-08-23T02:10:09Z No. of bitstreams: 1 Dissertação_Marília_Couto_Meparem_Final.pdf: 1945142 bytes, checksum: c6e0327e24f17dc800c92e2c488e2590 (MD5) Approved for entry into archive by ROSANGELA APARECIDA LOBO null (rosangelalobo@btu.unesp.br) on 2020-08-24T17:52:00Z (GMT) No. of bitstreams: 1 couto_mm_me_bot_par.pdf: 534015 bytes, checksum: a297b40d62dc467c45bd4cd674d931a2 (MD5) Made available in DSpace on 2020-08-24T17:52:00Z (GMT). No. of bitstreams: 1 couto_mm_me_bot_par.pdf: 534015 bytes, checksum: a297b40d62dc467c45bd4cd674d931a2 (MD5) Previous issue date: 2020-07-24 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) A Síndrome de Down (SD) ou trissomia do cromossomo 21 é a cromossomopatia mais comum na população e a principal causa de deficiência intelectual na sociedade. Vários estudos descrevem disfunções tireoidianas nos pacientes com SD, sendo o hipotireoidismo o mais frequente, desde o período neonatal até a puberdade, e que pode agravar várias manifestações já associadas à SD durante a infância. A avaliação da função motora em crianças e adolescentes com SD, através da escala Gross Motor Function Measure (GMFM-88), visa auxiliar na definição de metas terapêuticas. Portanto este estudo objetivou descrever a frequência de disfunções da tireoide, especificamente do hipotireoidismo, e sua correlação com a função motora grossa em crianças e adolescente com SD seguidas em um Ambulatório de Pediatria Genética. Método: Estudo clínico transversal em uma amostra intencional de crianças e adolescentes com SD, em atendimento ambulatorial de Pediatria Genética do Hospital das Clínicas de Botucatu (HCFMB), com idade entre 5 meses e 15 anos de idade. Foram coletados dados do prontuário eletrônico dos pacientes sendo, condições de nascimento, história patológica pregressa, dados demográficos e resultados de exames laboratoriais para avaliação da função tireoidiana, classificando-os em hipotireoidismo clinico, subclinico, eutireoidismo e hipertireoidismo pelos níveis séricos do hormônio tireoestimulante (TSH) e da tiroxina livre (T4L). O hipotireoidismo foi considerado primário em todas as crianças com o distúrbio. Realizada a avaliação da função motora grossa destes pacientes, através da escala GMFM- 88. Projeto aprovado pelo Comitê de ética em pesquisa (CEP) da FMB. Resultados: concluiu-se que o avanço da faixa etária dos pacientes com SD se correlaciona com melhora no desempenho da função motora, a despeito da presença ou ausência do distúrbio tireoidiano, traduzindo a importância do seguimento multidisciplinar destes pacientes, independente da idade de início deste acompanhamento. Down syndrome (DS) or chromosome 21 trisomy is the most common chromosomal disorder in the population and the main cause of intellectual disability in society. Several studies describe thyroid dysfunctions in DS patients, with hypothyroidism being the most frequent, from the neonatal period to puberty, which can aggravate several manifestations already associated with DS during childhood. The assessment of motor function in children and adolescents with DS, using the Gross Motor Function Measure scale (GMFM-88), aims to assist in the definition of therapeutic goals. Therefore, this study aimed to describe the frequency of thyroid dysfunctions, specifically hypothyroidism, and its correlation with gross motor function in children and adolescents with DS followed in a Pediatric Genetic Clinic. Method: Cross-sectional clinical study in an intentional sample of children and adolescents with DS, in outpatient care of Genetic Pediatrics, Hospital das Clínicas de Botucatu (HCFMB), aged between 5 months and 15 years of age. Data were collected from patients' electronic medical records, such as birth conditions, past pathological history, demographic data and results of laboratory tests to assess thyroid function, classifying them into clinical and subclinical hypothyroidism, euthyroidism and hyperthyroidism by serum levels of thyroid-stimulating hormone (TSH) and free thyroxine (T4L). According to changes in the neonatal screening test, hypothyroidism was classified as congenital or acquired. The assessment of the gross motor function of these patients was carried out using the GMFM-88 scale. Project approved by the Research Ethics Committee (CEP) of FMB. Results: it was concluded that the advancement of the age range of patients with DS correlates with an improvement in the performance of motor function, despite the presence or absence of thyroid disorder, reflecting the importance of multidisciplinary follow-up of these patients, regardless of the age of beginning of this monitoring. FAPESP 2019/01566-4 FAPESP: 2019/21458-1
- Published
- 2020
5. Hipotireoidismo na criança: diagnóstico e tratamento Hypothyroidism in children: diagnosis and treatment
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Nuvarte Setian
- Subjects
Hipotireoidismo ,hormônios tireoidianos ,tireopatias ,insuficiência tireoidiana ,hipotireoidismo em pediatria ,deficiência tireóidea ,Hypothyroidism ,thyroid hormones ,thyropathies ,thyroid failure ,pediatric hypothyroidism ,thyroid deficiency ,Pediatrics ,RJ1-570 - Abstract
OBJETIVO: Apresentar dados relevantes e atualizados referentes ao quadro de hipotireoidismo do recém-nascido ao adolescente. FONTES DE DADOS: Artigos, revisões e livros contendo informações atualizadas e de interesse. SÍNTESE DOS DADOS:Esta revisão aborda dados sobre etiopatogenia do hipotireoidismo. A triagem para o hipotireoidismo congênito é importante para o diagnóstico e tratamento precoce do recém-nascido. Aponta as dificuldades na conduta do hipotireoidismo subclínico. Destaca a importância do diagnóstico da tireoidite auto-imune de Hashimoto, sua alta incidência entre os adolescentes, principalmente meninas, e a existência de um quadro neurológico grave, a encefalopatia de Hashimoto. Aponta para situações em que o hipotireoidismo grave pode levar a distúrbios da puberdade com situações de precocidade e retardo puberal. Descreve a importância dos fatores de transcrição na embriogênese da tireóide. Critérios diagnósticos e terapêuticos são abordados. CONCLUSÃO: Os hormônios tireoidianos são necessários para o crescimento e desenvolvimento normal desde a vida fetal. Sua produção insuficiente ou sua ação inadequada em nível celular ou molecular levam ao hipotireoidismo. Esses hormônios são necessários para o desenvolvimento do cérebro na vida fetal e pós-natal. Neonatologistas e pediatras deparam-se com problemas do desenvolvimento da criança, muitos dos quais já começam em vida intra-uterina. Atualmente, com a triagem neonatal, neonatologistas e pediatras podem evitar danos irreversíveis com tratamento precoce. Também devem estar atentos para disfunções como as do hipotireoidismo subclínico e tireoidite de Hashimoto, que podem provocar danos não só no crescimento, mas também no desenvolvimento neurológico e psicológico destas crianças e adolescentes.OBJECTIVE:To present relevant and updated information on the status of hypothyroidism in the pediatric population (newborn infants to adolescents). SOURCES: Original and review articles and books containing relevant updated data. SUMMARY OF THE FINDINGS: This review addressed data on the etiopathogeny of hypothyroidism and on the importance of screening for congenital hypothyroidism to assure early diagnosis and treatment of the newborn. We point out the difficulties experienced in the handling of subclinical hypothyroidism; we also address the importance of diagnosing autoimmune Hashimoto's thyroiditis, the high incidence of the disease among adolescents, mainly females, and the occurrence of a severe neurological condition, Hashimoto's encephalopathy. We indicate situations in which severe hypothyroidism may lead to puberty disorders (precocious or delayed puberty) and describe the importance of transcription factors in thyroid embryogenesis. Diagnostic and therapeutic criteria are also addressed. CONCLUSION: Thyroid hormones are necessary for normal growth and development since fetal life. Insufficient production or inadequate activity on the cellular or molecular level lead to hypothyroidism. These hormones are necessary for the development of the brain in the fetus and in the newborn infant. Neonatologists and pediatricians deal with child development issues in their practice, and many of these issues start during intrauterine life. Currently, with neonatal screening, neonatologists and pediatricians can prevent irreversible damage through early treatment. They should also be alert for dysfunctions such as subclinical hypothyroidism and Hashimoto's thyroiditis, which may provoke damage not only to growth, but also to the neurological and psychological development of these children and adolescents.
- Published
- 2007
- Full Text
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6. Differential effects of hypo- and hyperthyroidism on remodeling of contacts between neurons expressing the neuropeptide EI and tyrosine hydroxylase in hypothalamic areas of the male rat
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Gisela E. Pennacchio, Carolina Ayala, María Ester Celis, Marta Soaje, Graciela A. Jahn, Susana Ruth Valdez, Alicia Seltzer, and Jackson C. Bittencourt
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Male ,ROSTRAL/CAUDAL INCERTO-HYPOTHALAMIC AREA (IHY) ,medicine.medical_specialty ,CIENCIAS MÉDICAS Y DE LA SALUD ,Tyrosine 3-Monooxygenase ,Physiology ,Hypothalamus ,purl.org/becyt/ford/3.5 [https] ,030209 endocrinology & metabolism ,Biology ,Biochemistry ,Hyperthyroidism ,PEDUNCULAR PART OF THE LATERAL HYPOTHALAMUS (PLH) ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Endocrinology ,Hypothyroidism ,Internal medicine ,NEUROPEPTIDE (N) GLUTAMIC ACID (E) ISOLEUCINE (I) AMIDE (NEI) ,medicine ,Animals ,Rats, Wistar ,HORMÔNIOS TIREOIDIANOS ,Neurons ,Neuronal Plasticity ,HYPERTHYROID STATUS ,Tyrosine hydroxylase ,HYPOTHYROID STATUS ,Differential effects ,Otras Ciencias Médicas ,Rats ,Neuropeptide EI ,purl.org/becyt/ford/3 [https] ,HYPOTHALAMUS ,Oligopeptides ,030217 neurology & neurosurgery ,TYROSINE HYDROXYLASE (TH) - Abstract
The Neuropeptide EI (NEI, glutamic acid- isoleucine amide) participates in neuroendocrine function. Previously we demonstrated that NEI concentration is regulated by thyroid hormones in discrete hypothalamic areas in rats. We observed that the thyroid status affects the dopaminergic regulation of the pituitary hormones. In this study we explored possible interactions between NEI and tyrosine hydroxylase (TH) containing elements in selected hypothalamic areas of male rats. Neuronal somas, terminals and boutons were assessed by confocal microscopy, in hypo- and hyperthyroid animals. We observed a remodeling of the contacts between the TH and NEI immunoreactive elements in the incerto-hypothalamic area (IHy, also known as rostromedial zona incerta) according to thyroid function. However, in the dorsolateral zone of the peduncular part of the lateral hypothalamus (DL-PLH) the thyroid hormones affect the dendritic trees of the neurons without perturbing the overall NEI/TH contacts. Also, we demonstrated that TRH Receptor 1 (TRH-R1) is colocalized in NEI immunoreactive neurons in the peduncular part of the lateral hypothalamus (PLH) and NEI precursor mRNA expression increased by hypothyroidism indicating that NEI neurons are responsive to the feedback mechanisms of the Hypothalamic Pituitary-Thyroid Axis (HPT). In conclusion, the hypothyroid status seems to increase the interactions between the NEI neurons and the dopaminergic pathways while hyperthyroidism either decreases or displays no effects. Altogether these observations support the participation of the IHy and PLH NEI as a modulating component of the HPT suggesting that altered neuroendocrine, behavioral and cognitive dysfunctions induced by dysthyroidism could be in part mediated by NEI. Fil: Ayala, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina Fil: Pennacchio, Gisela Erika. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina Fil: Soaje, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina Fil: Bittencourt Guimaraes, Ana Tereza. Instituto de Ciencias Biomedicas; Brasil Fil: Celis, Marìa E.. Universidad Nacional de Cordoba. Facultad de Medicina. Departamento de Medicina. Cat.de Bacteriologia y Virologia Medicas; Argentina Fil: Jahn, Graciela Alma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina Fil: Valdez, Susana Ruth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina Fil: Seltzer, Alicia Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina
- Published
- 2019
7. Triiodothyronine differentially modulates the LH and FSH synthesis and secretion in male rats
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Renato M. Salgado, Maria Tereza Nunes, Telma Maria Tenório Zorn, Erika Lia Brunetto, Francemilson Goulart-Silva, Paula Bargi-Souza, and Renata Marino Romano
- Subjects
Male ,0301 basic medicine ,endocrine system ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Gene Expression ,Gonadotropic cell ,FSHB ,03 medical and health sciences ,Follicle-stimulating hormone ,Endocrinology ,Hypothyroidism ,Internal medicine ,medicine ,Animals ,Euthyroid ,RNA, Messenger ,Rats, Wistar ,HORMÔNIOS TIREOIDIANOS ,Triiodothyronine ,Chemistry ,Thyroid ,Luteinizing Hormone ,Rats ,030104 developmental biology ,medicine.anatomical_structure ,Thyroidectomy ,Follicle Stimulating Hormone ,Luteinizing hormone ,hormones, hormone substitutes, and hormone antagonists ,Hormone - Abstract
Hypothyroidism and thyrotoxicosis produce adverse effects in male reproduction by unknown mechanisms. We investigated whether triiodothyronine (T3) modulates luteinizing hormone (LH) and follicle stimulating hormone (FSH) synthesis/secretion, by inducing different thyroid states. In hypothyroidism, the content of Lhb and Fshb mRNAs was increased, while their association to ribosomes and the protein content were reduced and the serum LH and FSH concentrations were augmented and decreased, respectively. Thyrotoxicosis reduced Lhb mRNA and LH serum concentration, and increased Lhb mRNA translational rate. The Fshb mRNA content and its association to ribosomes were also increased, whereas FSH serum concentrations were comparable to euthyroid levels. Acute T3 treatment decreased the total content of Lhb and Fshb mRNAs, and increased their association to ribosomes, as well as the LHB and FSHB contents in secretory granules. This study shows that T3 acts on gonadotrophs, resulting in direct effects on LH and FSH synthesis/secretion of male rats, suggesting that some reproductive disorders observed in men may be associated with thyroid hormone imbalances.
- Published
- 2018
8. The multiple effects of thyroid disorders on bone and mineral metabolism
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Cardoso, Ludmilla F., Maciel, Léa M. Z., and de Paula, Francisco J. A.
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thyroid hormone resistance ,Thyroid hormones ,osteoporose ,tireotoxicose ,resistência ao hormônio tireoidiano ,hypothyroidism ,hipotireoidismo ,Hormônios tireoidianos ,osteoporosis ,thyrotoxicosis - Abstract
Differently from most hormones, which commonly are specialized molecules able to influence other cells, tissues and systems, thyroid hormones (TH) are pleiotropic peptides, whose primordial function is difficult to identify. The complex action of TH on human economy can be easily witnessed by examining the diverse consequences of TH excess and deficiency during development and after maturity. In particular, different manifestations in bone modeling and remodeling reflect the circumstantial consequences of thyroid disturbances, which are age dependent. While hyperthyroidism during childhood enhances bone mineralization and accelerates epiphyseal maturation, in adults it induces bone loss by predominant activation of osteoclast activity. Furthermore, the syndrome of TH resistance is a multifaceted condition in which different sites exhibit signs of hormone excess or deficiency depending on the configuration of the TH receptor isoform. The investigation of the impact of TH resistance on the skeleton still remains to be elucidated. We present here a thorough review of the action of TH on bone and of the impact of thyroid disorders, including hyper- and hypothyroidism and the syndrome of TH resistance, on the skeleton. Diferentemente da maioria dos hormônios, que usualmente são moléculas especializadas capazes de influenciar outras células, tecidos e sistemas, os hormônios da tireoide (HT) são peptídeos pleiotrópicos, cuja função primordial é difícil de identificar. A ação complexa dos HT na fisiologia humana pode ser facilmente reconhecida ao observar as diversas consequências do excesso e da deficiência de HT durante e após o pleno desenvolvimento. Em particular as diferentes manifestações na modelação e remodelação óssea refletem que as consequências esqueléticas das disfunções tireoidianas dependem das circunstâncias e variam com a idade. Enquanto o hipertireoidismo durante a infância aumenta a mineralização óssea e acelera a maturação epifisária, em adultos induz a perda óssea pela ativação predominante da ação osteoclástica. Além disso, a síndrome de resistência ao HT é uma condição multifacetada na qual diferentes tecidos apresentam sinais de excesso ou deficiência hormonal, dependendo da predominância da expressão das diversas isoformas do receptor de HT. O impacto da resistência ao HT sobre o esqueleto ainda é motivo de investigação. Apresentamos aqui uma revisão abrangente sobre as ações ósseas dos HT e o impacto no esqueleto dos distúrbios da tireoide, incluindo hipo e hipertireoidismo e síndrome de resistência ao HT.
- Published
- 2014
9. Effects of hypothyroidism on male reproductive system
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Rocha, Aline Silva [UNESP], Papa, Frederico Ozanam [UNESP], and Universidade Estadual Paulista (Unesp)
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Thyroid hormones ,Sertoli cells ,Hipotiroidismo ,Hormonas tiroideas ,Testículos ,Testículo ,Triiodotironina ,Células de Sertoli ,Hypothyroidism ,Testis ,Triiodothyronine ,Hipotireoidismo ,Hormônios tireoidianos ,Triyodotironina - Abstract
Made available in DSpace on 2016-07-07T12:37:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2012. Added 1 bitstream(s) on 2016-07-07T12:46:13Z : No. of bitstreams: 1 ISSN0102-5716-2012-19-03-294-302.pdf: 96537 bytes, checksum: cb2ad7928f32c3b24493a9e46e7cf086 (MD5) Os hormônios tireoidianos são essenciais para o crescimento, o desenvolvimento e o metabolismo de diversos tecidos e órgãos. Atualmente, sabe-se que estes hormônios desempenham uma importante atividade na função testicular em diversas espécies por meio de receptores específicos situados, principalmente, nas células de Sertoli. As disfunções tireoidianas, em especial o hipotireoidismo, afeta a espermatogênese e a esteroidogênese testicular podendo levar à infertilidade. Embora sejam relacionadas diversas alterações reprodutivas em animais que apresentam hipotireoidismo, os resultados das pesquisas são controversos e pouco se conhece sobre a ação direta dos hormônios tireoidianos no sistema reprodutor. Por meio deste artigo, objetiva-se apresentar uma revisão na qual serão descritos os efeitos do hipotireoidismo na função testicular e glândulas acessórias. Thyroid hormones are essential for growth, development and metabolism in many tissues and organs. Currently, it is known that these hormones play an important activity in testicular function in several species through specific receptors located, mainly, in Sertoli cells. The thyroid dysfunction, particularly hypothyroidism, affects testicular steroidogenesis and spermatogenesis and may lead to infertility. Although several reproductive changes have been related in animals with hypothyroidism, the results of some studies are controversial and little is known about the direct effects of thyroid hormones in the reproductive system. Through this article, we report a revision in which we will describe the effects of hypothyroidism in the testicular function and accessory glands. Las hormonas tiroideas son esenciales para el crecimiento, el desarrollo y el metabolismo en varios tejidos y órganos. En la actualidad, se sabe que estas hormonas desempeñan una actividad importante en la función testicular en varias especies a través de receptores específicos situados principalmente en las células de Sertoli. Las disfunciones de la tiroides, en especial el hipotiroidismo, afecta a la espermatogénesis y la esteroidogénesis testicular pudiendo llevar a la infertilidad. A pesar de haber sido descritas diversas alteraciones reproductivas relacionadas con el hipotiroidismo en animales, los resultados de las investigaciones son contradictorios y poco se sabe sobre los efectos directos de las hormonas tiroideas en el sistema reproductor. En esta revisión se describen los efectos del hipotiroidismo sobre la función testicular y glándulas accesorias. Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Departamento de Reprodução Animal e Radiologia Veterinária, Botucatu, SP, Brasil Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Departamento de Reprodução Animal e Radiologia Veterinária, Botucatu, SP, Brasil
- Published
- 2012
10. Fatores Interferentes na Interpretação de Dosagens Laboratoriais no Diagnóstico de Hiper e Hipotireoidismo
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Graf, Hans and Carvalho, Gisah Amaral
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Hypothyroidism ,Thyroid hormones ,TSH ,Interferentes ,Hipotiroidismo ,Hipertiroidismo ,Hyperthyroidism ,Interferents ,Hormônios tireoidianos - Abstract
Desde os primeiros relatos na literatura médica, descrevendo os quadros clínicos de hiper e hipotireoidismo, muito pouco mudou no cenário da semiologia destas entidades e mesmo na sua abordagem terapêutica. As mudanças que assistimos nos últimos anos se relacionam às ferramentas laboratoriais utilizadas no diagnóstico destas disfunções. Paralelamente a estes desenvolvimentos, passamos a entender melhor os fatores que interferem na interpretação das dosagens laboratoriais no diagnóstico do hiper e hipotireoidismo. Neste artigo avaliaremos a utilização das medidas séricas de TSH e dos hormônios tireoideanos, bem como as armadilhas e interferências encontradas no seu uso cotidiano. Since the first reports in the medical literature describing the clinical presentation of hypo and hyperthyroidism, very little has changed on the semiologic scenario of these entities and even in their therapeutic approach. The changing trends refer much more to the tools used to diagnose thyroid disease. In parallel with these developments, we understand much better about the factors that interfere in the interpretation of thyroid function tests in the diagnosis of hyper and hypothyroidism. In this article, we analyzed the utility of serum TSH and thyroid hormone measurements, as well the pitfalls and interferences in its common daily use.
- Published
- 2002
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