Coeliac Disease Chronc Diarhoea Flashcards
What is celiac disease / celiac sprue or non-tropical sprue
a maladaptive autoimmune response to gluten, a protein found in many grains (e.g., wheat).
often occurs in patients with other autoimmune illnesses, as both are associated with HLA variants causing pathological immune responses
Cause they d coeliac disease
Genetic predisposition with association to HLA antigens Common: HLA-DQ2 (90–95%)
Eating gliadin from grains like wheat, rye, and barley leads to an autoimmune reaction within the small intestinal wall.
Chromosomal disorders
Turner syndrome, Down syndrome
associated with autoimmune conditions: autoimmune hepatitis,
inflammatory bowel disease,
rheumatoid arthritis, sarcoidosis,
selective IgA deficiency
PP of coeliac disease
individual who is genetically predisposed develops an immunological response to gliadin, an alcohol-soluble fraction of gluten.
Consumption of food containing gluten →
tissue transglutaminase is released →
modifies gliadin from gluten proteins →
pathogenic T cells react to and are activated by modified gliadin →
mediate chronic intestinal inflammation →
epithelial damage resulting in villous atrophy, crypt hyperplasia, and loss of brush border →
impaired resorption of nutrients in the SMALL Intestine→ malabsorption symptoms
Sx of coeliac disease
mild or asymptomatic cases are more common than the classic presentation of the disease.
Gastrointestinal symptoms
Chronic or recurring diarrhea: steatorrhea
Flatulence, abdominal bloating, and pain
Nausea/vomiting
Lack of appetite
Extraintestinal symptoms and associations
Malabsorption symptoms: fatigue, weight loss, vitamin deficiency, iron deficiency anemia, osteoporosis, hypocalcemia
In children: failure to thrive, growth failure, delayed puberty
Dermatological associations: !!!!dermatitis herpetiformis!!!!
Neuropsychiatric symptoms: peripheral neuropathies (numbness, burning and tingling of the hands and feet) , headache, ataxia, depression, irritability
Gynecological associations: reduced fertility or infertility
Endocrine associations:
autoimmune thyroid disease, type 1 diabetes mellitus
Associated chromosomal syndromes: Turner syndrome, Down syndrome
Other associated conditions: autoimmune hepatitis, inflammatory bowel disease, rheumatoid arthritis, sarcoidosis, selective IgA deficiency[ref][ref]
Dg of coeliac disease
serum antibodies tested.
diagnosis
confirmed w/ biopsy.
1)Laboratory tests
-Gold standard: IgA (anti‑)tissue transglutaminase antibody (ab against an ez released by GI cells in inflamm)
In addition to the initial diagnosis, also useful for follow-up. ( TCG decreases over time)
-Quantitative IgA test: In the case of an IgA deficiency, patients are tested for IgG-based antibodies
-IgG deamidated gliadin peptide (DGP) indications:
IgA deficiency
children under age two
Fat malabsorption can be detected by quantitative stool fat assays or qualitatively by fat stains (e.g., Sudan III stain)
2)Endoscopy with small intestine biopsy
Confirmatory test
At least five duodenal biopsies taken and histologically examined.
Histological findings characteristic of celiac disease
- Villous atrophy
- Crypt hyperplasia 3.Intraepithelial lymphocytic infiltration
rx of coeliac disease
Lifelong gluten-free diet!!!!
-Abstain from products containing: wheat, rye, barley, spelt
Recommended foods: rice, maize, potatoes, soy beans, millet, potentially oats
70% of cases, clinical improvement occurs within two weeks after initiating the diet.
Histological improvement occurs within months after beginning the diet.
In case of secondary lactase deficiency: avoid milk products
Iron and vitamin substitution
Supplementation of calcium and vitamin D to prevent bone loss
complication of coeiliacc disease
Secondary lactase deficiency (shortage of lactase caused by a problem in your small intestine)
Adenocarcinoma of the small bowel
is it possible to prevent
coeliac disease
in infantcy between 17–26 weeks of age ensure, gluten-free diet that only introduces small amounts of wheat (into the supplementary diet) infants, maintaining a gluten-free diet that only introduces small amounts of wheat (into the supplementary diet) appears to have a protective effect against developing celiac disease.