Lost patch of hair at base of scalp due to alopecia areata. Courtesy Wikimedia,
What Is Alopecia Areata?
A lopecia areata is an autoimmune attack on hair follicles characterized by sudden hair loss involving scalp or beard, although any hairy area may be affected.
Areas of hair loss have a patchy pattern with sharply defined edges.
Q: Can all hair be affected?
A: All body hair may be lost, which is called alopecia universalis although this is uncommon.
In alopecia areata, white blood cells of the immune system attack the rapidly growing cells in the hair follicles. The affected hair follicles become small and drastically slow down hair production. Fortunately, the stem cells that continuously supply the follicle with new cells do not seem to be targeted. So the follicle always has the potential to regrow hair but regrowth is unpredictable.1
What Is Alopecia Areata In Celiac Disease and/or Gluten Sensitivity?
Pitting edema. Right photo shows that indent remains from pressing. Courtesy wikimedia.
What Is Edema?
E dema is an abnormal swollen condition of the skin characterized by excess extracellular fluid volume, meaning there is an increase of the fluid that normally surrounds cells. Edema may be hardly noticeable or it can become extensive.
Edema can have various appearances and can develop from various causes.
Q: What are the appearances and causes of edema?
A: Here are the appearances of edema:
Pitting edema. It is called pitting edema if when the skin is pressed with a finger, the indent remains. This edema results from fluid leaking out of the bloodstream into the surrounding tissues. Pitting edema can be a feature of many disorders including heart disease, kidney disease, vascular disease, cancer, and malnutrition.
Myxedema is a firm swelling or thickening of subcutaneous skin that does not pit, as seen in thyroid disease.
Here are causes of edema:
Local edema as a response to trauma or infection.
Lower extremity edema from poor circulation and malnutrition.
Edema in the lungs from right sided heart disease.
Abdominal edema from liver disease, intestinal disease.
Body wide edema from heart disease, kidney disease, thyroid disease.
What Is Edema In Celiac Disease and/or Gluten Sensitivity?
S ucrose intolerance is the inability to digest sucrose, a widely available sugar, while sucrosemia is the abnormal presence of sucrose in the bloodstream.
Q: Why cannot the body digest sucrose?
A: Sucrose, such as cane or beet sugar, is a double molecule sugar which must first be digested before being absorbed from the gut into the bloodstream. That is, sucrose must be split into its component single molecules of fructose and glucose, which are then properly absorbed.
The inability to properly digest sucrose results directly from low production and activity of sucrase in the small intestine. Sucrase is the specific enzyme that splits or digests sucrose.
Undigested sucrose does not remain idle. Its presence acts osmotically to draw water from the body into the intestine, causing watery diarrhea.
Meanwhile, microbiota (normal bacteria) in the colon eagerly ferment the abnormally present sucrose that arrives from the small intestine. Fermentation generates short-chain fatty acids and hydrogen gas, which results in bloating pain.1
In sucrosemia, sucrose molecules abnormaly pass through an unhealthy small intestinal lining and enter the bloodstream where there presence is abnormal. Sucrose in the blood is filtered out by the kidneys and excreted in urine.
Positive response to a breath hydrogen test (BHT), involving 1 – 3 hours of time post ingestion of sucrose test dose, signifies malabsorption in the small intestine and fermentation in the colon. If BHT is positive before 60 minutes, the result implies bacteria is abnormally present in the small intestine, causing fermentation there. Endoscopy is used to measure sucrase activity in tissue samples.
What Is Sucrose Intolerance And Sucrosemia In Celiac Disease and/or Gluten Sensitivity?
Reproduction of a lithograph plate showing inside of the stomach from Gray’s Anatomy. Courtesy Wikipedia Commons.
What Is Delayed Gastric Emptying?
D elayed gastric emptying is a stomach motility or movement disorder characterized by abnormally slow movement of gastric contents from the stomach through the pyloric sphincter into the duodenum, causing dyspepsia.
Q: What determines how fast the stomach empties?
A: How fast the stomach empties depends on the pressure of strong coordinated muscle contractions in the top region of the stomach propelling chyme against resistance at the pylorus (base region of the stomach).
Chyme is food that has been dissolved and thoroughly mixed with stomach secretions.
In the digestion of carbohydrate, protein and fat, protein leaves the stomach first (1 hour), then carbohydrates (1 1/2 to 2 hours), and fat takes longest to digest (2-4 hours). Plain water is able to pass through the pylorus within 5 minutes.
What Is Delayed Gastric Emptying In Celiac Disease and/or Gluten Sensitivity?
Vitamin A is a family of fat-soluble compounds that are essential for health, vision, protection of the body, reproduction, and normal growth of children before and after birth.
Q: What is the family of vitamin A?
A: The natural vitamin A family members are called retinoids. Retinoids are found only in animal food sources. They include retinol (alcohol form), retinal (aldehyde form), and retinoic acid (acid form).
In the plant kingdom, pigments called carotenoids can yield retinoids on metabolism in the body. Carotenoids that can converted to retinol include β-carotene, α-carotene, and β-cryptoxanthin.1
There are hundreds of various carotenoids although only a few have been researched including beta-carotene, lycopene, lutein and zeaxanthin.
Fruits and vegetables that are a rich source of carotenoids are thought to provide health benefits by decreasing the risk of various diseases, particularly eye diseases and certain cancers (esophageal, stomach, pancreatic, bladder and cervical). In this respect, research shows that the regular consumption of fruits and vegetables may prevent 20% of most types of cancers.2
In part, the beneficial effects of carotenoids are thought to be due to their role as antioxidants. Lutein and zeaxanthin may be protective in eye disease because they absorb damaging blue light that enters the eye.3
The antioxidant effects appear to be highest in fresh fruit as compared to preserved fruit. A study of fresh peach pulps and peel in animals demonstrated highest antioxidant and anti-inflammatory effects in fresh fruits preventing against induced damage in animal tissues.4
A study investigating the specific anti-inflammatory and anti-oxidant micronutrients that reduce oxidative stress showed that adolescents with metabolic syndrome (MetS) had consistently lower carotenoid concentrations compared with their counterparts without MetS. MetS prevalence was estimated at 7% among boys and 3% among girls.5
What Is Vitamin A Deficiency In Celiac Disease and/or Gluten Sensitivity?
Sources:
Maggio M, de Vita F, Lauretani F, et al. Relationship between Carotenoids, Retinol, and Estradiol Levels in Older Women. Nutrients. 2015 Aug 5;7(8):6506-19. doi: 10.3390/nu7085296. [↩]
Gasparotto J, Somensi N, Bortolin RC, Moresco KS, Girardi CS, Klafke K, Rabelo TK, Morrone Mda S, Vizzotto M, Raseira Mdo C, Moreira JC, Gelain DP. Effects of different products of peach (Prunus persica L. Batsch) from a variety developed in southern Brazil on oxidative stress and inflammatory parameters in vitro and ex vivo. J Clin Biochem Nutr. 2014 Sep;55(2):110-9. doi: 10.3164/jcbn.13-97. Epub 2014 Sep 1. [↩]
Krinsky NI1, Johnson EJ. Carotenoid actions and their relation to health and disease. ((Mol Aspects Med. 2005 Dec;26(6):459-516. [↩]
Gasparotto J, Somensi N, Bortolin RC, Moresco KS, Girardi CS, Klafke K, Rabelo TK, Morrone Mda S, Vizzotto M, Raseira Mdo C, Moreira JC, Gelain DP. Effects of different products of peach (Prunus persica L. Batsch) from a variety developed in southern Brazil on oxidative stress and inflammatory parameters in vitro and ex vivo. J Clin Biochem Nutr. 2014 Sep;55(2):110-9. doi: 10.3164/jcbn.13-97. [↩]
TGBeydoun MA, Canas JA, Beydoun HA, Chen X, Shroff MR, Zonderman AB. Serum antioxidant concentrations and metabolic syndrome are associated among U.S. adolescents in recent national surveys. J Nutr. 2012 Sep;142(9):1693-704. doi: 10.3945/jn.112.160416. [↩]
A real photomicrograph of carcinoma of the esophagus. Panorama of 6 photos of a slide at 40x through the microscope. Some areas may appear blurry due to shallow DOF.
What Is Cancer Of The Esophagus?
C ancer of the esophagus is a malignancy arising in the stratified squamous cell lining of any part of the esophagus and having a poor prognosis.
This tumor first invades the deeper layers of the esophagus which includes the layer beneath the mucosa (submucosa) and muscle before it may invade structures close to it including the aorta and trachea. Later, it may spread to organs further away such as the liver, lungs and bones.
Q: What is the stratified squamous cell lining of the esophagus?
A: Stratified squamous cells are flat epithelial cells that are composed of several layers, called the epithelium. This type of epithelium forms the surface mucosa that lines the inside of the esophagus.
The esophagus itself is a muscular tube that transports swallowed substances to the stomach. It begins at the cricoid cartilage (Adam’s apple) as a continuation of the pharynx in the throat and ends at the lower esophageal sphincter (LES).
The LES is a circular muscle surrounding the junction of the esophagus and stomach. The LES opens to allow swallowed food and liquids to enter the stomach and closes to prevent their travelling back into the esophagus.
Who is Affected in the General Population?
Esophageal cancer is the fifth leading cause of death in men from cancer worldwide.1
What Is Cancer Of The Esophagus In Celiac Disease and/or Gluten Sensitivity?
Sources:
Feldman M, Friedman LS, Brandt LJ. Sleisenger & Fordtran’s Gastrointestinal and Liver Disease. ed 9. Philadelphia: Saunders; 2010. pp. 745–767. [↩]
Unexpected weight loss is unintentional loss of body mass composition or inability to gain weight marked by decreased serum proteins and increased stool fat.1
What Is Unexpected Weight Loss In Celiac Disease and/or Gluten Sensitivity?
Chronic diarrhea is an intestinal motility disorder characterized by 1) alteration in stool formation causing loose to fluid movements and quantity of movements with or without abdominal pain and 2) interference with normal carbohydrate salvage by the intestinal microbe population.
The severity of diarrhea is determined by the frequency and quantity of fluid lost.
Q: What is carbohydrate salvage by microbes in the colon?
A: Carbohydrate salvage in the colon is the necessary process whereby billions of microbes normally present in the colon work to breakdown undigestible carbohydrate foodstuffs such as fiber that continually arrive from the small intestine.
The microbial action releases energy to the body that would otherwise be lost with defecation, generates short-chain fatty acids, and stimulates sodium and fluid absorption. In this important process, butyrate and proprionate are produced which nourish the colonocytes (cells that line the colon), and acetate is produced for the liver.
While diarrhea may be a common symptom of small bowel mucosal disease, the consequent malabsorption can lead to substantial malnutrition and nutrient deficiencies. The small intestine, unlike the colon, has been relatively inaccessible, and systematic evaluation is often necessary to identify and treat small intestinal mucosal diseases that lead to diarrhea. All patients with severe diarrhea or diarrhea associated with features suggestive of malabsorption may have a disease of the small intestinal mucosa that requires careful evaluation and targeted management.1
What Is Chronic Diarrhea In Celiac Disease and/or Gluten Sensitivity?
Sources:
Murray JA1, Rubio-Tapia A. Diarrhoea due to small bowel diseases. Best Pract Res Clin Gastroenterol. 2012 Oct;26(5):581-600. doi: 10.1016/j.bpg.2012.11.013. [↩]
T ransient erythroblastopenia is a rare disorder of red blood cell formation characterized by brief, reversible disappearance of erythroblasts (red blood cell precursors) in the bone marrow of children.
Q: What do the red blood cells look like?
A: Circulating red blood cells appear normal so that the anemia which develops is a normocytic (normal cellular) anemia in contrast to microcytic (small cell) anemia in iron deficiency or macrocytic (large cell) anemia in vitamin B12 or folic acid deficiency.
Because new red blood cells are failing to mature, packed red blood cell transfusions may be necessary in severe anemia.
In adults, this disorder is called pure red blood cell anemia.
What Is Transient Erythroblastopenia In Celiac Disease and/or Gluten Sensitivity?
Proptosis and Lid Retraction are Features of Grave’s Disease, or Hyperthyroidism.
What Is Grave’s Disease (Hyperthyroidism)?
G 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. 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:
Taber’s Cyclopedic Medical Dictionary. 19th ed. F.A. Davis Company. Philadelphia, PA. [↩]
