scholarly journals IgA anti-tissue transglutaminase as a diagnostic marker of gluten sensitive enteropathy

1999 ◽  
Vol 52 (4) ◽  
pp. 274-277 ◽  
Author(s):  
R. J. Lock ◽  
M. C. Pitcher ◽  
D. J. Unsworth
Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1233 ◽  
Author(s):  
Henok Habtamu ◽  
Tarcisio Not ◽  
Luigina De Leo ◽  
Sara Longo ◽  
Ligia Moretto ◽  
...  

Celiac disease (CD) is a gluten-dependent autoimmune disorder affecting a significant percentage of the general population, with increasing incidence particularly for children. Reliable analytical methods suitable for the serological diagnosis of the disorder are urgently required for performing both the early diagnosis and the follow-up of a patient adhering to a gluten-free diet. Herein we report on the preparation and application of a novel electrochemical immunosensor based on the use of ensembles of gold nanoelectrodes (NEEs) for the detection of anti-tissue transglutaminase (anti-tTG), which is considered one reliable serological marker for CD. To this end, we take advantage of the composite nature of the nanostructured surface of membrane-templated NEEs by functionalizing the polycarbonate surface of the track-etched membrane with tissue transglutaminase. Incubation of the functionalized NEE in anti-tTG samples results in the capture of the anti-tTG antibody. Confirmation of the recognition event is achieved by incubating the NEE with a secondary antibody labelled with horseradish peroxidase (HRP): in the presence of H2O2 as substrate and hydroquinone as redox mediator, an electrocatalytic current is indeed generated whose increment is proportional to the amount of anti-tTG captured from the sample. The optimized sensor allows a detection limit of 1.8 ng mL−1, with satisfactory selectivity and reproducibility. Analysis of serum samples from 28 individuals, some healthy and some affected by CD, furnished analytical results comparable with those achieved by classical fluoroenzyme immunoassay (FEIA). We note that the NEE-based immunosensor developed here detects the IgG isotype of anti-tTG, while FEIA detects the IgA isotype, which is not a suitable diagnostic marker for IgA-deficient patients.


2000 ◽  
Vol 38 (5) ◽  
pp. 357-364 ◽  
Author(s):  
M. Sárdy ◽  
S. Kárpáti ◽  
F. Péterfy ◽  
K. Rásky ◽  
E. Tomsits ◽  
...  

1999 ◽  
Vol 45 (12) ◽  
pp. 2142-2149 ◽  
Author(s):  
Miklós Sárdy ◽  
Uwe Odenthal ◽  
Sarolta Kárpáti ◽  
Mats Paulsson ◽  
Neil Smyth

Abstract Background: Tissue transglutaminase (TGc) has recently been identified as the major, if not the sole, autoantigen of gluten-sensitive enteropathy (GSE). We developed and validated an ELISA based on the human recombinant antigen and compared it to existing serological tests for GSE [guinea pig TGc ELISA and endomysium antibody (EMA) test]. Methods: Human TGc was expressed in the human embryonic kidney cell line 293-EBNA as a C-terminal fusion protein with the eight-amino acid Strep-tag II allowing one-step purification via streptavidin affinity chromatography. We carried out ELISA assays for IgA antibodies against TGc using calcium-activated human and guinea pig TGc. The sera were also tested on monkey esophagus sections by indirect immunofluorescence for IgA EMA. We examined 71 serum samples from patients with GSE (38 with celiac disease, 33 with dermatitis herpetiformis), including 16 on therapy, and 53 controls. Results: The human TGc could be expressed and purified as an active enzyme giving a single band on a Coomassie-stained gel. The mean intra- and interassay CVs for the human TGc ELISA were 3.2% and 9.2%, respectively. The area under the ROC curve was 0.999. The specificity and sensitivity were 98.1% (95% confidence interval, 95.7–100%) and 98.2% (95.9–100%), respectively. Conclusions: The human TGc ELISA was somewhat superior to the guinea pig TGc ELISA, and was as specific and sensitive as the EMA test. The human TGc-based ELISA is the method of choice for easy and noninvasive screening and diagnosis of GSE.


Medicina ◽  
2019 ◽  
Vol 55 (5) ◽  
pp. 136
Author(s):  
Tsvetelina Velikova ◽  
Martin Shahid ◽  
Ekaterina Ivanova-Todorova ◽  
Kossara Drenovska ◽  
Kalina Tumangelova-Yuzeir ◽  
...  

Background and objectives: Dermatitis herpetiformis (DH) is a blistering dermatosis, which shares common immunologic features with celiac disease (CD). The aim of the present study was to explore the performance of a panel of CD-related antibodies and IL-17A in Bulgarian patients with DH. Materials and Methods: Serum samples from 26 DH patients at mean age 53 ± 15 years and 20 healthy controls were assessed for anti-tissue transglutaminase (anti-tTG), anti-deamidated gliadin peptides (anti-DGP), anti-actin antibodies (AAA), and IL-17A by enzyme linked immuno-sorbent assay (ELISA), as well as anti-tTG, anti-gliadin (AGA), and anti-Saccharomyces cerevisiae antibodies (ASCA) using immunoblot. Results: The average serum levels of anti-tTG, anti-DGP, AGA, AAA, and the cytokine IL-17A were at significantly higher levels in patients with DH compared to the average levels in healthy persons which stayed below the cut-off value (p < 0.05). Anti-DGP and anti-tTG antibodies showed the highest diagnostic sensitivity and specificity, as well as acceptable positive and negative predictive value. None of the healthy individuals was found positive for the tested antibodies, as well as for ASCA within the DH group. All tests showed good to excellent correlations (r = 0.5 ÷ 0.9, p < 0.01). Conclusions: Although the diagnosis of DH relies on skin biopsy for histology and DIF, serologic testing of a panel of celiac-related antibodies could be employed with advantages in the diagnosing process of DH patients. Furthermore, DH patients who are positive for the investigated serologic parameters could have routine monitoring for gastrointestinal complications typical for the gluten-sensitive enteropathy.


2013 ◽  
Vol 20 (4) ◽  
pp. 447-451 ◽  
Author(s):  
Sarada L. Nandiwada ◽  
Anne E. Tebo

ABSTRACTCeliac disease (CD) is an autoimmune disorder that occurs in genetically susceptible individuals of all ages and is triggered by immune response to gluten and related proteins. The disease is characterized by the presence of HLA-DQ2 and/or -DQ8 haplotypes, diverse clinical manifestations, gluten-sensitive enteropathy, and production of several autoantibodies of which endomysial, tissue transglutaminase, and deamidated gliadin peptide antibodies are considered specific. Although antireticulin antibodies (ARA) have historically been used in the evaluation of CD, these assays lack optimal sensitivities and specificities for routine diagnostic use. This minireview highlights the advances in CD-specific serologic testing and the rationale for eliminating ARA from CD evaluation consistent with recommendations for diagnosis.


2013 ◽  
Vol 88 (4) ◽  
pp. 594-599 ◽  
Author(s):  
Fernanda Berti Rocha Mendes ◽  
Adaucto Hissa-Elian ◽  
Marilda Aparecida Milanez Morgado de Abreu ◽  
Virgínica Scaff Gonçalves

Dermatitis herpetiformis (DH) or Duhring-Brocq disease is a chronic bullous disease characterized by intense itching and burning sensation in the erythematous papules and urticarial plaques, grouped vesicles with centrifuge growth, and tense blisters. There is an association with the genotypes HLA DR3, HLA DQw2, found in 80-90% of cases. It is an IgA-mediated cutaneous disease, with immunoglobulin A deposits appearing in a granular pattern at the top of the dermal papilla in the sublamina densa area of the basement membrane, which is present both in affected skin and healthy skin. The same protein IgA1 with J chain is found in the small intestinal mucosa in patients with adult celiac disease, suggesting a strong association with DH. Specific antibodies such as antiendomysium, antireticulina, antigliadin and, recently identified, the epidermal and tissue transglutaminase subtypes, as well as increased zonulin production, are common to both conditions, along with gluten-sensitive enteropathy and DH. Autoimmune diseases present higher levels of prevalence, such as thyroid (5-11%), pernicious anemia (1-3%), type 1 diabetes (1-2%) and collagen tissue disease. The chosen treatment is dapsone and a gluten-free diet.


2021 ◽  
Author(s):  
Tsitsi Parulava ◽  
David Pruidze ◽  
Maia Chkhaidze ◽  
Tamar Gotua ◽  
Irma Mandjavidze

Gluten sensitive enteropathy-celiac disease is an immune-mediated disorder caused by permanent sensitivity to gluten in genetically susceptible individuals. Epidemiologic studies of last years suggest that it is common and may occur in 0,5-1% of the general population. The bowel inflammatory and immunologic response results in atrophy and damage in the small bowel and secondary malabsorbtion. The mode of presentation can be quite variable. Celiac disease is generally defined as chronic diarrea and failure to thrive in infants and toddlers, diarrhea is still the most common symptom, but disease may occure in different age groups and with exstraintestinal, sometimes monosymptomic clinic. Clinical forms of celiac disease are: classic, atypical, silent, latent and potential. Definitive diagnose of Celiac disease requires serrologic screening, small intestinal biopsy and effectiveness of elimination diet. Anti-tissue transglutaminase antybody test (TTG IgA and TTG IgG) is highly sensitive, specific and less expensive, thus is recommended for general practice. None of serologic tests are 100% reliable. Definitive diagnosis requires characteristic histologic changes in intestine mucus. Tissue for investigation may be taken from duodenum during gastro endoscopy. Diagnosing only by results of gluten-free diet is not correct. The only treatment for celiac disease is lifelong exclusion of gluten. Early diagnosis and strict dietary restrictions appear to be the only possibility of prevention risk for failure to thrive, delay of sexual maturity, autoimmune disorders, adenocarcinoma of gastrointestinal tract and lymphoma.


2021 ◽  
pp. 134-139
Author(s):  
A. T. Kamilova ◽  
S. I. Geller ◽  
X. T. Ubaykhodjaeva

Abstract Introduction. Celiac disease, or gluten-sensitive enteropathy, can be defined as a persistent intolerance of wheat gliadins and other cereal prolamines in the small intestinal mucosa of genetically susceptible individuals. The clinical picture of the disease can often be misleading because it varies greatly from patient to patient, resulting in delayed diagnosis.To analyze the clinical case of a child with celiac disease and acquired ichthyosis.Results. The disease, until a final diagnosis was established, had a severe course due to gastrointestinal and dermatological disorders. From the age of 1.5 years, the child had frequent diarrhea, bloating, which is why she was repeatedly hospitalized in the hospital at the place of residence. However, there was no effect from the ongoing therapeutic measures, and other symptoms such as vomiting, peripheral edema, deficiency of height and weight, and severe peeling of the skin joined in. The diagnosis was finally confirmed at the age of 2.5 years after the test for antibodies to tissue transglutaminase IgA (fifty-fold excess relative to the norm). A genetic study revealed alleles of genes responsible for predisposition to celiac disease. The results of a biopsy of the mucous membrane of the duodenum had signs of atrophy, lymphoid infiltration, corresponding to a lesion of the small intestine according to the classification Marsh III. Microscopic examination of the skin – hyperkeratosis with a decrease in the granular layer. On the basis of the obtained data, the diagnosis was made: Celiac disease, active phase, severe course, complicated by proteinenergy insufficiency severe degree, exudative enteropathy syndrome, 2 degree anemia, concomitant diagnosis: acquired ichthyosis. The girl was prescribed a gluten-free diet, and symptomatic drug therapy was carried out. In dynamics, the condition has improved. After 6 months, at the second visit, gastrointestinal and skin symptoms were absent, physical development was age-appropriate.Conclusions. The classic form of celiac disease usually manifests itself with several major symptoms, such as diarrhea, abdominal pain, weight loss, and nutritional deficiencies. In this article we wanted to talk about a rare combination of celiac disease with ichthyosis, therefore, practitioners should be wary of a combination of skin and gastrointestinal symptoms.


Sign in / Sign up

Export Citation Format

Share Document