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Gastritis, Collagenous

Microscopic View of Gastric Biopsy Showing a Collagen Band Under the Surface Mucosal Cells. Courtesy Gastrolab.com
Microscopic View of Gastric Biopsy Showing a Collagen Band Stained Pink Under the Surface Mucosal Cells. Courtesy Gastrolab.com

What Is Collagenous Gastritis?

[dropcap]C[/dropcap]ollagenous gastritis is a rarely reported stomach disorder characterized by the deposition of a subepithelial collagen band and accompanying inflammatory infiltrate in the stomach wall.

A subepithelial collagen band means that collagen, a tough fibrous protein, has abnormally accumulated under the surface layer of epithelial cells which form the mucosa lining the stomach.

The surface mucosa may remain intact and not show lymphocytosis and/or gastritis on endoscopic examination or it may become stripped off and bleed from entrapped capillaries. Biopsy is necessary to diagnose collagenous gastritis.1

Q: Why does collagen become deposited under the surface lining of the stomach?

A: It is thought that collagen deposition is preceded by inflammation and tissue damage. However, the natural history and pathogenesis of collagenous gastritis remain unclear.2

What Is Collagenous Gastritis In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Jain R, Chetty R. Collagenous gastritis. Int J Surg Pathol. 2010 Dec;18(6):534-6. doi: 10.1177/1066896908329588. Epub 2008 Dec 22. [↩]
  2. Leung ST, Chandan VS, Murray JA, Wu TT. Collagenous gastritis: histopathologic features and association with other gastrointestinal diseases. Am J Surg Pathol. 2009 May;33(5):788-98. doi: 10.1097/PAS.0b013e318196a67f. [↩]

Jejunitis, Chronic Ulcerative

jejunitis
Copyright © 2014 Sigman et al.; licensee BioMed Central Ltd.1

What Is Chronic Ulcerative Jejunitis?

[dropcap]C[/dropcap]hronic ulcerative jejunitis is a disease of the small intestine that is characterized by inflammation and ulceration of the mucosal lining of the jejunum.

Q: How do inflammation and ulceration affect digestion in the jejunum?

A: Inflammation swells the lining and this impairs absorption of nutrients. Together with ulceration the inflamed and swollen jejunum hampers peristalsis, or the rhythmic movement of food by intestinal muscles.

Impaired peristalsis promotes constipation and/or diarrhea. Bacterial overgrowth may develop. Ulcerations may bleed which could cause the development of iron deficiency anemia.

What Is Chronic Ulcerative Jejunitis In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Sigman T, Nguyen VH, Costea F, Sant’Anna A, Seidman EG. Ulcerative jejunitis in a child with celiac disease. BMC Gastroenterol. 2014 Feb 13;14:29. doi: 10.1186/1471-230X-14-29. [↩]

Aphthous Ulcers (Canker Sores) 

Aphthous_ulcer[1]What Are Aphthous Ulcers?

[dropcap]A[/dropcap]phthous ulcers, also called canker sores, are a chronic disorder of soft mouth tissue characterized by small, painful purpuric, papular, or erosive lesions that are often surrounded by erythematous (red) margins.1

Q: What soft mouth tissues develop canker sores?

A: Canker sores can erupt on the mucosal surface of the inside lip, sides of mouth, under the tongue and along the side of the tongue. When they are forming, the area swells into a papule, or small bump. Later, the surface erodes and a crater forms with firm pus.

What Are Aphthous Ulcers In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Lahteenoja H, Toivanen A, Viander M, Maki M, Irjala K, Raiha I, Syrjanen S. Oral mucosal changes in coeliac patients on a gluten-free diet. European Journal of Oral Sciences. Oct 1998;106(5):899,8p. [↩]

Lactose Intolerance

Lactose IntoleranceWhat Is Lactose Intolerance?

[dropcap]L[/dropcap]actose intolerance is a well known symptom of carbohydrate malabsorption characterized by inability to properly digest lactose, the sugar in milk, due to low lactase digesting activity in the small intestine.

Lactase is an enzyme produced by specialized cells in the tips of villi within the brush border of the small intestinal lining that digests lactose.

Lactose is a disaccharide, or double sugar, made up of a molecule of glucose and a molecule of galactose (simple sugars). Lactose cannot be absorbed as is into the body unless it is broken down by lactase into glucose and galactose.

Q: How does lactose cause diarrhea?

A: If lactose is not broken down, undigested lactose moves into the colon where it acts osmotically to draw water from the walls of the colon into the lumen, which causes diarrhea by the unnatural amount of water. How much water? Can be 2 liters! Meanwhile, the normal population of colonic bacteria ferment the undigested lactose, generating short-chain fatty acids and hydrogen gas, resulting in bloating pain and flatulence.

Testing for intolerance is based on the action of lactose to increase intestinal permeability.1 Positive response to a breath hydrogen test (BHT), involving 1 – 3 hours of time post ingestion of lactose 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 activity of lactase in a tissue sample.

Treatment is avoidance of milk and dairy products that contain lactose. Nevertheless, milk treated with lactase enzyme can be safely consumed. Fermented milk products like yogurt or kefir are safe because the lactose has been digested by organisms. If there is also a problem with milk protein, then no milk is acceptable that comes from the cow or animal that is causing the allergy.

What Is Lactose Intolerance In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Farhadi A, Banan A, Fields J, Keshavarzian A. Intestinal barrier: an interface between health and disease. Journal of Gastroenterology and Hepatology. 2003;18:479-91. [↩]

Bleeding / Swollen Gums

Vitamin C Deficiency: Clean Teeth with Swollen Gums.
Vitamin C Deficiency: Swollen Gums.

What Are Bleeding / Swollen Gums?

[dropcap]B[/dropcap]leeding and/or swollen gums is  an inflammatory disorder characterized by changes in gum integrity that may result in tooth loss.

Sponginess of the gum (swelling) indicates inflammation, called gingivitis. 

Q: What causes gingivitis?

A: Gingivitis that is caused by inadequate dental hygiene shows as pockets of swollen gum between or along the base of teeth where sticky plaque was allowed to build up. Plaque holds bacteria that inflames the gums where it occurs.

Gingivitis that is caused by vitamin C deficiency, pregnancy, certain drugs such as the anti-epileptic drug phenytoin, and leukemia affects the whole gum irrespective of mouth care.

What Are Bleeding / Swollen Gums In Celiac Disease and/or Gluten Sensitivity?

Maltose Intolerance

Fermentation of Grain by Yeast Releases Carbon Dioxide Which rises the Dough. Courtesy Johnson Mathey Catalyst
Bread is a Major Source of Maltose. Courtesy Johnson Mathey Catalyst

What Is Maltose Intolerance?

[dropcap]M[/dropcap]altose intolerance is an enzymopathy (enzyme failure) characterized by inability of the gut to properly break down maltose sugar molecules in food due to low maltase enzyme activity of the small intestinal lining.

Q: What is maltose and maltase?

A: Maltose is a double sugar made up of two molecules of glucose and is derived from starch. Maltase is the enzyme required to digest or release glucose from maltose. Maltase is produced in the microscopic brush border (microvilli) at the base of villi.

Here’s what happens when maltose is not digested:

  • Undigested maltose cannot be absorbed into the body but remains inside the small intestine where it acts osmotically to draw an unnatural amount of water from the body into the intestine which produces diarrhea.
  • Additionally, normal gut bacteria ferment the abnormal abundance of unabsorbed maltose, thereby generating an abundance of short-chain fatty acids and hydrogen gas which result in bloating and pain.1
  • Positive response to a breath hydrogen test (BHT), involving 1 – 3 hours of time post ingestion of maltose 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.

What Is Maltose Intolerance In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Krause’s Food, Nutrition, & Diet Therapy. 10th Edition. Kathleen Mahan, Sylvia Escott-Stump. 2000. W.B. Saunders Company. [↩]

Autoimmune Cholangitis

Normal Liver Lobule. Courtesy almostadoctor.com
Figure 1: Normal Liver Lobule. Courtesy almostadoctor.com

What Is Autoimmune Cholangitis?

[dropcap]A[/dropcap]utoimmune cholangitis is a rare inflammatory self-targeted disease of the biliary tract produced by high levels of immunoglobulin G (IgG) antibodies and antinuclear antibodies (ANA).

Autoimmune cholangitis is characterized by progressive inflammation and scarring that leads to narrowing and destruction of the bile ducts and development of biliary cirrhosis of the liver.

Autoimmune cholangitis is also termed anti-mitochondrial antibody-negative primary biliary cirrhosis because there is no production of anti-mitochondrial antibodies.

Q: What happens when bile ducts can no longer transport bile out of the liver?

A: Bile that cannot be removed from the liver by the biliary tract backs up and damages the liver, causing cirrhosis. In Figure 1, bile back up would directly damage the hepatic (liver) cells seen here as grey “blocks.” 

Bile is a greenish brown liquid continually made by the liver cells (hepatocytes) from phospholipids salt, cholesterol, and aging blood cells that it removes from circulation. 

Bile also carries away waste products produced by normal metabolism and toxic substances that are removed by the liver for eventual elimination in stool. As such, bile must continually flow out of the liver to prevent build-up in the liver. 

Bile from the hepatic cells drains into small tubes called canniculi and then into larger bile ducts to be carried out of the liver to the gall bladder for storage until needed to aid in the digestion and absorption of fat from the small intestine.   Bile emulsifies fat eaten in the diet so that the pancreatic enzyme called lypase can break it down into its fatty acid and glycerol components. 

Unfortunately, autoimmune cholangitis is difficult to diagnose because it mimics many other diseases such as primary sclerosing cholangitis, sarcoidosis, cancer and lymphoma.

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

Milk Intolerance – Bovine Beta Casein Enteropathy

Cows Milk enteropathyWhat Is Milk Intolerance (Bovine Beta Casein Enteropathy)?

[dropcap]B[/dropcap]ovine beta casein enteropathy is characterized by raised serum IgA antibodies to bovine beta casein found by blood testing and damage to mucosa of the jejunum found by biopsy.

The jejunum is the second section of the small intestine, between the duodenum and the ileum.

Mucosa damage is similar to damage caused by gluten.

Q: What is bovine beta casein?

A: Bovine beta casein is a protein found in cow’s milk.

An immune reaction to protein in milk is totally different from lactose intolerance. Lactose intolerance develops from deficiency of an intestinal enzyme called lactase which is required to digest lactose, the sugar in milk.

What Is Milk Intolerance In Celiac Disease and/or Gluten Sensitivity?

Ulceration And Stenosis, Postbulbar Duodenal

What Is Postbulbar Duodenal Ulceration/Stenosis?

[dropcap]P[/dropcap]ostbulbar duodenal ulceration is a chronic inflammatory disorder characterized by thickening of the intestinal lining with excoriation penetrating the muscularis mucosae (muscle layer of the intestine) associated with villous atrophy.

The ulcer is well-defined. Stenosis due to thickening of the area narrows the hollow inside of the duodenum which impairs passage of foodstuffs and may lead to obstruction.

Q: Is postbulbar duodenal ulceration painful?

A: Postbulbar duodenal ulceration may not cause symptoms but usually causes gnawing pain that is relieved by eating food. After eating there develops nausea and bloating.

Complications include obstruction, bleeding, and perforation of the duodenal lining. Ulcers do not usually become malignant.

What Is Postbulbar Duodenal Ulceration/Stenosis In Celiac Disease and/or Gluten Sensitivity?

Cirrhosis, Primary Biliary

biliary system primary biliary cirrhosisWhat Is Primary Biliary Cirrhosis?

[dropcap]P[/dropcap]rimary biliary cirrhosis (PBC) is a biliary tract disease characterized by chronic cholestasis (build-up of bile) and gradual destruction of bile ducts within the liver, called intrahepatic bile ducts, caused by chronic inflammation.

Primary biliary cirrhosis comes under the umbrella term autoimune liver disease in which the end result is immune-mediated hepatocellular (liver cell) or hepatobiliary (bile duct) injury.1

Q: What is the end result of destruction of bile ducts?

A: The end result of destruction of bile ducts is liver damage.

Injured liver tissue from chronic inflammation and the buildup of bile leads to cirrhosis, a condition in which the liver slowly deteriorates and malfunctions.

Scar tissue replaces healthy liver tissue, partially blocking the flow of blood through the liver. Scarring also impairs the liver’s normal ability to control infections, remove bacteria and toxins from the blood, process nutrients, hormones, and drugs, make proteins that regulate blood clotting, produce bile, and effectively replace its own cells when they become damaged.2

The liver is the largest organ within the body. It lies mostly in the upper part of the abdomen on the right side just under the diaphragm. About 70% of liver tissue is made up of cube shaped cells called hepatocytes that do the main work of the liver. Other cells (epithelial) form structure and are arranged in single layers around blood vessels, sinusoids, and bile ducts.

Bile ducts carry bile, a greenish brown liquid made by the liver to the gall bladder for storage until needed to aid in the digestion and absorption of fat and fat-soluble vitamins A, D, E, and K from the small intestine. Bile emulsifies fat eaten in the diet so that the pancreatic enzyme called lypase can break it down into its fatty acid and glycerol components which can then be absorbed into the body.

Bile also carries away waste products produced by normal metabolism and toxic substances that are removed by the liver for eventual elimination in stool. Bile is continually made by the liver from phospholipids, bile acids, cholesterol, and aging blood cells it removes from circulation. As such, bile must continually flow out of the liver to prevent build-up in the liver.

There is no cure for primary biliary cirrhosis.

What Is Primary Biliary Cirrhosis In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Trivedi PJ, Adams DH. Mucosal immunity in liver autoimmunity: a comprehensive review. J Autoimmun. 2013 Oct;46:97-111. doi: 10.1016/j.jaut.2013.06.013. [↩]
  2. http://digestive.niddk.nih.gov/ddiseases/pubs/primarybiliarycirrhosis/ [↩]