Microbial Transglutaminase Used in Bread Preparation at Standard Bakery Concentrations Does Not Increase Immunodetectable Amounts of Deamidated Gliadin

The effect of standard bakery concentrations of microbial transglutaminase (MTG) in wheat bread preparation on the immunoreactivity of sera of celiac disease (CD) patients was investigated. Immunoblotting using monoclonal antibodies specific to unmodified and/or deamidated gliadin showed no differen...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2017-08, Vol.65 (32), p.6982-6990
Main Authors: Heil, Andreas, Ohsam, Jürgen, van Genugten, Bernard, Diez, Oscar, Yokoyama, Keiichi, Kumazawa, Yoshiyuki, Pasternack, Ralf, Hils, Martin
Format: Article
Language:English
Subjects:
Bacterial Proteins - chemistry
Bread - analysis
Celiac Disease - immunology
Enzyme-Linked Immunosorbent Assay
Food Handling - methods
Gliadin - analysis
Gliadin - immunology
Humans
Streptomyces - enzymology
Transglutaminases - chemistry
Transglutaminases - immunology
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Summary:The effect of standard bakery concentrations of microbial transglutaminase (MTG) in wheat bread preparation on the immunoreactivity of sera of celiac disease (CD) patients was investigated. Immunoblotting using monoclonal antibodies specific to unmodified and/or deamidated gliadin showed no differences between control bread and MTG bread. Deamidation of gliadin could not be detected at standard MTG concentrations. Sera of CD patients were characterized using anti-gliadin and anti-deamidated gliadin peptide (DGP) enzyme-linked immunosorbent assay and grouped into DGP high- and low-titer pools. The recognition pattern obtained after using both CD sera pools for immunoblotting did not reveal differences between control and MTG-treated bread protein extracts. Our results indicate that MTG treatment of wheat bread prepared with typical MTG concentrations used in standard bakery processes does not lead to immunodetectable amounts of CD immunotoxic deamidated gliadins.
ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.7b02414