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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...

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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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Thyroid peroxidase antibody and screening for postpartum thyroid dysfunction.

Mohamed A Adlan1, Lakdasa D Premawardhana

  • 1Section of Endocrinology and Diabetes, Department of Medicine, Caerphilly District Miners Hospital, St. Martin's Road, Caerphilly CF83 2WW, UK.

Journal of Thyroid Research
|July 19, 2011
PubMed
Summary

Screening for postpartum thyroid dysfunction (PPTD) using thyroid peroxidase antibody (TPOAb) in early pregnancy is effective. This approach offers comparable or better sensitivity and specificity than other screening times, proving cost-effective.

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Area of Science:

  • Endocrinology
  • Reproductive Medicine
  • Immunology

Background:

  • Postpartum thyroid dysfunction (PPTD) is a prevalent condition associated with significant maternal morbidity.
  • Effective treatments exist for hypothyroid PPTD, and identifying women at risk for long-term hypothyroidism is crucial.
  • Current screening strategies for PPTD lack consensus regarding methodology and optimal timing.

Purpose of the Study:

  • To evaluate the utility of thyroid peroxidase antibody (TPOAb) as a screening tool for PPTD.
  • To assess the performance of TPOAb screening in early pregnancy compared to other gestational periods.
  • To explore the cost-effectiveness and advantages of universal screening for PPTD.

Main Methods:

  • Analysis of data on TPOAb testing in early pregnancy.
  • Comparison of sensitivity and specificity of TPOAb screening at different pregnancy stages.
  • Evaluation of cost-effectiveness of proposed screening strategies.

Main Results:

  • Thyroid peroxidase antibody (TPOAb) testing in early pregnancy demonstrates moderate positive predictive value.
  • The sensitivity and specificity of TPOAb screening in early pregnancy are comparable or superior to screening during other pregnancy phases.
  • Early pregnancy TPOAb screening has been confirmed as a cost-effective strategy.

Conclusions:

  • Screening for postpartum thyroid dysfunction (PPTD) using TPOAb in early pregnancy is a viable and effective strategy.
  • This screening approach offers advantages in terms of diagnostic accuracy and cost-effectiveness.
  • Universal screening for PPTD in early pregnancy warrants further consideration due to its benefits.