@article {8524, title = {Lack of Evidence of Rotavirus-Dependent Molecular Mimicry as a Trigger of Celiac Disease.}, journal = {Clin Exp Immunol}, year = {2016}, month = {2016 Aug 22}, abstract = {

New data suggest the involvement of Rotavirus (RV) in triggering autoimmunity in celiac disease (CD) by molecular mimicry between the human-transglutaminase protein and the dodecapeptide (260-271 aa) of the RV protein VP7 (pVP7). To assess the role of RV in the onset of CD, we measured the anti-pVP7 antibodies in the sera of children with CD and of control groups. We analysed serum samples of 118 biopsy proven CD patients and 46 patients with potential-CD; 32 children with other gastrointestinal diseases; 107 no-CD children and 107 blood donors. By ELISA assay, we measured IgA-IgG antibodies against the synthetic peptides pVP7, the human transglutaminase-derived peptide (476-487 aa) which shows an homology with VP7 protein and a control peptide. The triple-layered RV particles (TLPs), containing the VP7 protein, and the double-layered RV-particles (DLPs), lacking the VP7 protein were also used as antigens in ELISA assay. Antibody reactivity to the RV-TLPs was positive in 22/118 (18\%) CD patients and in both paediatric (17/107, 16\%) and adult (29/107, 27\%) control groups, without showing a statistically significant difference among them (p=0.6, p=0.1). Biopsy-proven CD patients as well as the adult control group demonstrated a high positive antibody reactivity against both pVP7 (34/118, 29\% CD patients; 66/107, 62\% adult controls) and control synthetic peptides (35/118, 30\% CD patients; 56/107, 52\% adult controls) suggesting a non-specific response against RV pVP7. We show that children with CD do not have higher immune reactivity to RV, thus questioning the molecular mimicry mechanism as a triggering factor of CD. This article is protected by copyright. All rights reserved.

}, issn = {1365-2249}, doi = {10.1111/cei.12855}, author = {Ziberna, Fabiana and De Lorenzo, Giuditta and Schiavon, Valentina and Arnoldi, Francesca and Quaglia, Sara and De Leo, Luigina and Vatta, Serena and Martelossi, Stefano and Burrone, Oscar R and Ventura, Alessandro and Not, Tarcisio} } @article {7759, title = {Serum anti-tissue transglutaminase antibodies detected during febrile illness may not be produced by the intestinal mucosa.}, journal = {J Pediatr}, volume = {166}, year = {2015}, month = {2015 Mar}, pages = {761-3}, abstract = {

Anti-transglutaminase antibodies are the diagnostic marker of celiac disease, and are considered to be synthesized only by intestinal B-lymphocytes. During an infectious disease, these antibodies are transiently detected in serum. We show that these infection-triggered antibodies may not originate in the intestinal mucosa and are not an indication of celiac disease.

}, keywords = {Autoantibodies, Celiac Disease, Child, Preschool, Diagnosis, Differential, Enzyme-Linked Immunosorbent Assay, Female, GTP-Binding Proteins, Humans, Intestinal Mucosa, Male, Transglutaminases}, issn = {1097-6833}, doi = {10.1016/j.jpeds.2014.12.005}, author = {De Leo, Luigina and Quaglia, Sara and Ziberna, Fabiana and Vatta, Serena and Martelossi, Stefano and Maschio, Massimo and Not, Tarcisio} } @article {3521, title = {Intestinal-mucosa anti-transglutaminase antibody assays to test for genetic gluten intolerance.}, journal = {Cell Mol Immunol}, volume = {11}, year = {2014}, month = {2014 Nov}, pages = {617-20}, keywords = {Celiac Disease, Cell Surface Display Techniques, Child, Diet, Gluten-Free, Disease Progression, Early Diagnosis, Female, Follow-Up Studies, HLA-DQ Antigens, Humans, Immunoassay, Immunoglobulin A, Intestinal Mucosa, Male, Prospective Studies, Transglutaminases}, issn = {2042-0226}, doi = {10.1038/cmi.2014.32}, author = {Quaglia, Sara and De Leo, Luigina and Ziberna, Fabiana and Vatta, Serena and Villanacci, Vincenzo and Granzotto, Marilena and Petix, Vincenzo and Martelossi, Stefano and Di Leo, Grazia and Torelli, Lucio and Not, Tarcisio} } @article {1741, title = {Cryptic genetic gluten intolerance revealed by intestinal antitransglutaminase antibodies and response to gluten-free diet.}, journal = {Gut}, volume = {60}, year = {2011}, month = {2011 Nov}, pages = {1487-93}, abstract = {

BACKGROUND AND OBJECTIVE: Antitransglutaminase (anti-TG2) antibodies are synthesised in the intestine and their presence seems predictive of future coeliac disease (CD). This study investigates whether mucosal antibodies represent an early stage of gluten intolerance even in the absence of intestinal damage and serum anti-TG2 antibodies.

METHODS: This study investigated 22 relatives of patients with CD genetically predisposed to gluten intolerance but negative for both serum anti-TG2 antibodies and intestinal abnormalities. Fifteen subjects were symptomatic and seven were asymptomatic. The presence of immunoglobulin A anti-TG2 antibodies in the intestine was studied by creating phage-antibody libraries against TG-2. The presence of intestinal anti-TG2 antibodies was compared with the serum concentration of the intestinal fatty acid-binding protein (I-FABP), a marker for early intestinal mucosal damage. The effects of a 12-month gluten-free diet on anti-TG2 antibody production and the subjects{\textquoteright} clinical condition was monitored. Twelve subjects entered the study as controls.

RESULTS: The intestinal mucosa appeared normal in 18/22; 4 had a slight increase in intraepithelial lymphocytes. Mucosal anti-TG2 antibodies were isolated in 15/22 subjects (68\%); in particular symptomatic subjects were positive in 13/15 cases and asymptomatic subjects in 2/7 cases (p=0.01). No mucosal antibodies were selected from the controls{\textquoteright} biopsies. There was significant correlation between the presence of intestinal anti-TG2 antibodies and positive concentrations of I-FABP (p=0.0008). After a gluten-free diet, 19/22 subjects underwent a second intestinal biopsy, which showed that anti-TG2 antibodies had disappeared in 12/15 (p=0.002), while I-FABP decreased significantly (p<0.0001). The diet resolved both extraintestinal and intestinal symptoms.

CONCLUSIONS: A new form of genetic-dependent gluten intolerance has been described in which none of the usual diagnostic markers is present. Symptoms and intestinal anti-TG2 antibodies respond to a gluten free-diet. The detection of intestinal anti-TG2 antibodies by the phage-antibody libraries has an important diagnostic and therapeutic impact for the subjects with gluten-dependent intestinal or extraintestinal symptoms. Clinical trial number NCT00677495.

}, keywords = {Adolescent, Adult, Antibodies, Anti-Idiotypic, Asymptomatic Diseases, Celiac Disease, Child, Child, Preschool, Diet, Gluten-Free, Fatty Acid-Binding Proteins, Female, Genetic Predisposition to Disease, GTP-Binding Proteins, Health Status, Humans, Intestinal Mucosa, Male, Middle Aged, Peptide Library, Transglutaminases, Young Adult}, issn = {1468-3288}, doi = {10.1136/gut.2010.232900}, author = {Not, Tarcisio and Ziberna, Fabiana and Vatta, Serena and Quaglia, Sara and Martelossi, Stefano and Villanacci, Vincenzo and Marzari, Roberto and Florian, Fiorella and Vecchiet, Monica and Sulic, Ana-Marija and Ferrara, Fortunato and Bradbury, Andrew and Sblattero, Daniele and Ventura, Alessandro} }