Related Experiment Videos
No association between HIV disease and its treatment and thyroid function
S Madge1, C J Smith, F C Lampe
1Royal Free Centre for HIV Medicine and Department of Primary Care and Population Sciences, Royal Free and UC Medical School, Rowland Hill Street, London, UK. s.madge@pcps.ucl.ac.uk
HIV Medicine
|February 20, 2007
Summary
The prevalence of overt thyroid disease in HIV-positive patients is low, indicating routine screening may not be necessary. This study analyzed thyroid function in a London cohort over three years.
Area of Science:
- Endocrinology
- Infectious Diseases
- Public Health
Background:
- Thyroid dysfunction is a known complication in various chronic illnesses.
- Human Immunodeficiency Virus (HIV) infection and its treatment can potentially impact thyroid function.
Purpose of the Study:
- To determine the prevalence of overt and subclinical thyroid disease in HIV-positive patients.
- To identify risk factors for thyroid dysfunction, including highly active antiretroviral therapy (HAART).
- To assess the longitudinal occurrence of thyroid dysfunction over three years.
Main Methods:
- Retrospective analysis of thyroid function tests (TFTs) in a cohort of HIV-positive patients.
- Inclusion of patients with normal TFTs but a history of thyroid disease.
- Multivariate analysis to identify associated risk factors.
Main Results:
- Low prevalence of overt hypothyroidism (2.5%) and hyperthyroidism (<1%).
- Prevalence of subclinical hypothyroidism (4%) and hyperthyroidism (<1%).
- No significant association found between HAART, specific antivirals, and overt hypothyroidism.
Conclusions:
- Overt thyroid disease is uncommon in this HIV-positive cohort.
- Routine thyroid screening may not be warranted for all HIV-positive individuals.
- Further research could explore subclinical thyroid dysfunction and nonthyroidal illness in this population.
Related Concept Videos
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...
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...
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...
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...
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 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...
Functions of Thyroid Hormones
The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...