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Related Concept Videos

Blood Studies for Cardiovascular System III: Serum Lipid Profile01:25

Blood Studies for Cardiovascular System III: Serum Lipid Profile

Understanding serum lipids is crucial for maintaining cardiovascular health and preventing heart disease and stroke.
Serum lipids are fats and fatty substances in the blood and are crucial for various bodily functions, including energy storage, cellular structure, and hormone production. Serum lipids consist of cholesterol, triglycerides, and phospholipids.
Cholesterol is a soft, fat-like substance found in all body cells. It is crucial for producing hormones, vitamin D, and substances that aid...
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...
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 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...
Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ meats, shellfish,...
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...

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Related Experiment Videos

The correlation between thyrotropin and dyslipidemia in a population-based study.

Li Lu1, Beibei Wang, Zhongyan Shan

  • 1Department of Endocrinology and Metabolism, First Hospital of China Medical University, Shengyang, PR China.

Journal of Korean Medical Science
|February 3, 2011
PubMed
Summary

Thyroid-stimulating hormone (TSH) levels correlate with dyslipidemia in both subclinical hypothyroidism and euthyroid individuals. This association was observed independently of insulin sensitivity in the studied populations.

Keywords:
Cholesterol, HDLCholesterol, LDLThyrotropinTotal CholesterolTriglyceride

Related Experiment Videos

Area of Science:

  • Endocrinology
  • Metabolic Disorders
  • Clinical Biochemistry

Background:

  • Subclinical hypothyroidism is associated with lipid profile alterations.
  • Dyslipidemia is a significant risk factor for cardiovascular diseases.
  • Understanding the relationship between thyroid function and lipid metabolism is crucial for clinical management.

Purpose of the Study:

  • To investigate the association between serum thyrotrophin levels and dyslipidemia in subclinical hypothyroid and euthyroid subjects.
  • To determine if this association is influenced by insulin sensitivity.

Main Methods:

  • Cross-sectional study involving 110 subclinical hypothyroid and 1,240 euthyroid subjects.
  • Analysis of serum thyrotrophin and lipid profiles (HDL-C, triglyceride, total cholesterol, LDL-C).
  • Categorization of lipid profiles and comparison of thyrotrophin levels across subclasses.

Main Results:

  • Subclinical hypothyroid patients exhibited significantly lower high-density lipoprotein cholesterol (HDL-C) than euthyroid subjects.
  • Higher mean thyrotrophin levels were found in dyslipidemia subclasses compared to normal lipid subclasses.
  • Positive associations were observed between thyrotrophin and triglycerides/HDL-C in women, and thyrotrophin and total cholesterol/LDL-C in overweight women.

Conclusions:

  • Serum thyrotrophin levels are correlated with dyslipidemia in both subclinical hypothyroid and euthyroid individuals.
  • The observed correlation between thyrotrophin and dyslipidemia is independent of insulin sensitivity.
  • These findings highlight the importance of monitoring thyroid function in patients with lipid abnormalities.