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Hyperthyroidism I: Introduction

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...

Hyperthyroidism II: Pathophysiology

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...

Hypothyroidism II: Pathophysiology

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: Introduction

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...

Graves Disease II: Pathophysiology

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,...

Synthesis and Regulation of Thyroid Hormones

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...

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Lawsonia inermis - an alternative treatment for hyperthyroidism?

E Zumrutdal, F Karateke, K Daglioglu

Bratislavske Lekarske Listy

|March 8, 2014

Summary

Lawsonia inermis (L. inermis) was studied for its effects on hyperthyroidism in mice. L. inermis significantly reduced serum T4 levels, suggesting potential as an alternative treatment for Graves' disease.

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Area of Science:

Pharmacology
Endocrinology
Biochemistry

Background:

Hyperthyroidism is a condition characterized by excessive thyroid hormone production.
Graves' disease is a common autoimmune cause of hyperthyroidism.
Lawsonia inermis (L. inermis) is a plant with traditional medicinal uses.

Purpose of the Study:

To investigate the effects of L. inermis on thyroid hormone levels in a mouse model of hyperthyroidism.
To assess the impact of L. inermis on cellular pH in a model of peritonitis.

Main Methods:

The study involved two phases in mice.
Phase 1 examined L. inermis's effect on liver tissue pH during E. coli-induced peritonitis.
Phase 2 measured serum T4 levels after TSH-induced hyperthyroidism, with and without L. inermis administration.

Main Results:

L. inermis administration led to significantly alkaline liver tissue pH in mice with peritonitis (p<0.05).
In TSH-induced hyperthyroidism, serum total T4 levels were significantly lower at 48 hours in mice treated with L. inermis (p<0.05).

Conclusions:

Lawsonia inermis significantly reduces serum total T4 levels in a mouse model of TSH-induced hyperthyroidism.
These findings suggest L. inermis as a potential alternative therapeutic agent for Graves' disease.