Skip to content

Hashimoto’s Disease (Autoimmune Thyroiditis Causing Hypothyroidism)

DyspareuniaWhat Is Autoimmune Thyroiditis (Hypothyroidism)?

[dropcap]A[/dropcap]utoimmune thyroiditis, also called Hashimoto’s thyroiditis or Hashimoto’s Disease, is an autoimmune destruction of thyroid tissue characterized by insufficient thyroid hormone circulating in the body that causes formation of a goiter (enlarged thyroid gland) and hypothyroidism.

Hypothroidism refers to the condition of markedly reduced secretion of thyroid hormone. There are other causes of hypothyroidism besides Hashimoto’s thyroiditis.

Hashimoto’s thyroiditis is often associated with other autoimmune diseases such as celiac disease.

In Hashimoto’s thyroiditis, a profusion of antibodies are produced, which build up in the blood. Left untreated so that much of the thyroid gland is destroyed, this condition may progress to the very serious and life-threatening condition called myxedema.

Note: In myxedema, protein, electrolytes, and water abnormally accumulate in between cells which produce firm, inelastic puffy skin that is cool, dry, rough, scaly, and may appear yellow; in some people, areas such as the ankles become crusty with a look of tree bark. Many systemic changes develop shown by significant slowing of mental and physical functions. Please see below.

Q: What thyroid tissue is targeted for destruction?

A: In Hashimoto’s thyroiditis, high levels of autoantibodies target thyroglobulin and thyroid peroxidase, leading to inflammation and destruction of the thyroid gland. The resulting fibrosis or scarring of the gland results in lack of thyroid hormone production.

The thyroid gland consists of a large number of closed vesicles that contain a homogenous substance called colloid, which contains the thyroglobulin. Thyroglobulin is an iodine-containing protein secreted by the thyroid gland and stored within its colloid, from which the thyroid hormones thyroxine (T4) and triiodothyroinine (T3) are derived.1

T3 is the active hormone and is made from T4. Thyroid hormones affect metabolism, brain development, breathing, heart and nervous system functions, body temperature, muscle strength, skin dryness, menstrual cycles, weight, and cholesterol levels.

Thyroid hormone production is regulated by thyroid-stimulating hormone (TSH), which is made by the pituitary gland in the brain. Normally, when thyroid hormone levels in the blood are low, the pituitary releases more TSH. When thyroid hormone levels are high, the pituitary decreases TSH production.

Hashimoto’s disease, with or without the development of hypothyroidism, is treated with synthetic thyroxine, which is man-made T4. Health care providers prefer to use synthetic T4, such as Synthroid® (Levothyroxine), rather than synthetic T3, because T4 stays in the body longer, ensuring a steady supply of thyroid hormone throughout the day. The thyroid preparations made with animal thyroid are not considered as consistent as synthetic thyroid.2

What Is Autoimmune Thyroiditis In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Taber’s Cyclopedic Medical Dictionary. 19th ed. F.A. Davis Company. Philadelphia, PA. [↩]
  2. National Endocrine and Metabolic Diseases Information Service. [↩]

Selenium Deficiency

selenium gluten free celiac disease symptomWhat Is Selenium?

[dropcap]S[/dropcap]elenium is a mineral that is required by the body  in trace amounts for a healthy immune system, normal thyroid function, and antioxidant protection.

Selenium is absolutely required in the production of at least 30 selenoproteins in the body. First, selenium is joined to the amino acids cysteine as selenocysteine and to methionine as selenomethionine before being used as components for selenoproteins. Many selenoproteins are important antioxidant enzymes such as glutathione peroxidase.

Q: How does glutathione peroxidase work?

A: Glutathione peroxidase activity helps the recycling of vitamins C and E in optimizing the performance of the antioxidant system. The antioxidant properties of selenoproteins help prevent cellular damage from free radicals. Free radicals are natural by-products of oxygen metabolism that may contribute to the development of chronic diseases such as cancer and heart disease.

In the immune system, selenium stimulates immune properties of lymphocytes (white blood cells) by contributing to higher natural killer lymphocyte activity. Natural killer lymphocytes have the ability to destroy cancer cells and bacterial and viral agents.

Other selenoproteins help protect the thyroid gland from anti-oxidants and regulate thyroid function. Specifically, selenium plays an integral role in thyroid gland metabolism.1 Functions are more fully described below.

According to the Food and Agriculture Organization, United Nations, approximately 30 percent of tissue selenium is contained in the liver, 15 percent in kidney, 30 percent in muscle, and 10 percent in blood plasma.

What Is Selenium Deficiency In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Stazi AV, Trinti B. Selenium status and over-expression of interleukin-15 in celiac disease and autoimmune thyroid diseases. Ann Ist Super Sanita. 2010;46(4):389-99.DOI: 10.4415/ANN_10_04_06. [↩]

Hyperthyroidism – Grave’s Disease 

Proptosis and lid retraction are features of Grave's disease, or hyperthyroidism. Courtesy of Wikimedia.
Proptosis and Lid Retraction are Features of Grave’s Disease, or Hyperthyroidism.

What Is Grave’s Disease (Hyperthyroidism)?

[dropcap]G[/dropcap]rave’s disease, or hyperthyroidism, is an autoimmune thyroid disease characterized by diffuse nontender goiter, elevated thyroxine hormone levels (T4, T3), suppressed thyroid stimulating hormone (TSH), and presence of thyroid receptor antibodies in the blood.

The autoantibodies involved are anti-thyroid peroxidase and anti-thyroglobulin antibodies. They bind to the thyroid stimulating hormone receptors, causing thyroid stimulation. These antibodies are detected by blood tests.

Q: What happens to the thyroid gland in Grave’s disease?

A: The thyroid gland is located in the front of the neck. This butterfly shaped gland consists of a large number of closed vesicles that contain a homogenous substance called colloid, which contains the thyroglobulin. Thyroglobulin is an iodine-containing protein secreted by the thyroid gland and stored within its colloid, from which the thyroid hormones thyroxine (T4) and triiodothyroinine (T3) are derived.1

Thyroxine molecule, chemical structure. Thyroid gland hormone that plays a role in energy metabolism regulation. It is a iodine containing derivative of thyrosine. Atoms are represented as spheres with conventional color coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), iodine (purple).
Thyroxine molecule. Atoms are represented as spheres with conventional color coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), iodine (purple).

T3 is the active hormone and is made from T4. Thyroid hormones are released into the bloodstream as needed to control metabolism, brain development, breathing, heart and nervous system functions, body temperature, muscle strength, skin dryness, menstrual cycles, weight, and cholesterol levels.

Thyroid hormone production is regulated by thyroid-stimulating hormone (TSH), which is made by the pituitary gland in the brain. Normally, when thyroid hormone levels in the blood are low, the pituitary releases more TSH in response to stimulation by the nearby hypothalamus which is continually monitoring levels of thyroxin. When thyroid hormone levels are high, the pituitary decreases TSH production. So in Grave’s disease, release of TSH by the pituitary gland is suppressed by the hypothalamus because thyroid hormone is elevated. Goiter develops from growth stimulation by thyroid stimulating autoantibodies.

What Is Grave’s Disease In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Taber’s Cyclopedic Medical Dictionary. 19th ed. F.A. Davis Company. Philadelphia, PA. [↩]