Although celiac disease was formall...

Although celiac disease was formally described late in the 19th hundred years treatment remained empiric until the middle of the 20th hundred when patients were noted to improve dramatically after wheat was remov from their diet. With the progression in a continuously ascending gradation of small-bowel biopsy techniques, the small intestine was identified as the target organ. Disease causality was established when the characteristic features of villous flattening, vault hyperplasia, and increased intraepithelial lymphocyte (Figure 1) were shown to normalize after the institution of a gluten-free diet. (1)

In the mid-1960s, an enteropathy strikingly similar to celiac disease was identified in patients with dermatitis herpetiformis. Subsequently this skin disorder was shown to be a manifestation of gluten-sensitive enteropathy. In the mid-1960s, adult celiac disease was also noted to be associated with numerous neurologic disorders, including epilepsy, cerebral calcifications, and peripheral neuropathy. (1)

newly come population studies indicate that celiac disease is more habitual than was previously thought. a certain number of patients with gluten-sensitive enteropathy have minimal or no symptoms and are unlikely to be referr to a gastroenterologist unles the disease is considered. Hence, family physicians ne to be familiar with the diagnosis and management of gluten-sensitive enteropathy.

Pathophysiology

Ingested protein does not normally exasperate an immune response. This phenomenon is confineed "oral tolerance." Patients who exhibit authentic allergy to an ingested protein (eg milk or soy protein) have a typical IgE-mediated rejoinder consisting of urticaria, angioedema, and bronchoreactivity.

The autoimmunity in gluten-sensitive enteropathy involves plasma small rooms that produce IgA and IgG; there is little or no IgE involvement. present theory suggests that ingested a-gliadin (a component part of the gluten protein) and related peptides bind with tissue transglutaminase (a ubiquitous intracellular enzyme) in enterocyte The a-gliadin is rich in glutamine; transglutaminase deamidates glutamine residues, forming glutamic acid. Deamidation enhances the immunogenicity of a-gliadin at creating epitopes that are recognized as foreign on host cell-mediated immunity. (2)

Plasma small rooms produce IgA and IgG that are directed against a variety of antigens, including transglutaminase, endomysium, gliadin, and reticulin. Locally elaborated lymphokines attract inflammatory lonely dwellings (3) This intense local inflammatory reaction originates the villous flattening characteristic of gluten-sensitive enteropathy. Malabsorption of micronutrients (eg vitamins and minerals) and macronutrients (eg protein, carbohydrate, fat) come [i]or[/i] go after [i]or[/i] behinds Small-bowel involvement is most prominent proximally and may be "patchy," especially in patients with "silent" celiac disease (i.e., minimal or no symptoms) and those with dermatitis herpetiformis.

Approximately 95 percent of patients with celiac disease exhibit specific Human Leukocyte Antigen (HLA) class II alleles DQA1*0501 and DQB1*0201 (4) Patients with original 1 diabetes, autoimmune thyroid disease, (5) Sjogren's syndrome primary biliary cirrhosis, Addison's disease, systemic lupus erythematosus, selective IgA deficiency, and alopecia areata may also exhibit similar genotypes and are at risk for gluten-sensitive enteropathy (Table 1) Because many living bodys have these genotypes and solely a few develop gluten-sensitive enteropathy, investigators have hypothesized that other gene or cofactors may be involved. (1)

Epidemiology

Until newly celiac disease was considered to be relatively rare Previous U.S. figures suggested that it affected single in 6,000 persons. (6) However, population studies published in the past four years glance at a much higher prevalence, particularly in living bodys of European ancestry. (7) Studies escorted in Europe estimate the seroprevalence of celiac disease to be common case per 130 to 300 ones (8-10)

In a modern U.S. study, (11) investigators touchstoneed sera from 2,000 healthy R Cros vital fluid donors and found eight samples that were positive for antibodies associated with gluten-sensitive enteropathy (seven samples from white characters one sample from a black person) The seroprevalence rate in this application of mind (one case per 250 characters tested) is consistent with the rates in European studies.

The likelihood of having gluten-sensitive enteropathy increases to 10 to 20 percent in individuals who have a first-degree relative with celiac disease. (1) In addition, celiac disease is associated with other autoimmune syndrome For example, as many as 7 percent of patients with model I diabetes also have gluten-sensitive enteropathy. (12)

Clinical Presentation

Untreated gluten-sensitive enteropathy is associated with a range of symptoms13,14 (Table 2) The "classic" form typically at hands in infancy and manifests as failure to thrive, diarrhea, abdominal distention, developmental delay, and, occasionally, bitter malnutrition. Failure to diagnose the disorder may lead to a actual medical emergency.