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Functional & Integrative Genomics

, Volume 19, Issue 1, pp 123–136 | Cite as

Development of wheat genotypes expressing a glutamine-specific endoprotease from barley and a prolyl endopeptidase from Flavobacterium meningosepticum or Pyrococcus furiosus as a potential remedy to celiac disease

  • Claudia E. Osorio
  • Nuan Wen
  • Jaime H. Mejias
  • Bao Liu
  • Stephen Reinbothe
  • Diter von Wettstein
  • Sachin Rustgi
Original Article

Abstract

Ubiquitous nature of prolamin proteins dubbed gluten from wheat and allied cereals imposes a major challenge in the treatment of celiac disease, an autoimmune disorder with no known treatment other than abstinence diet. Administration of hydrolytic glutenases as food supplement is an alternative to deliver the therapeutic agents directly to the small intestine, where sensitization of immune system and downstream reactions take place. The aim of the present research was to evaluate the capacity of wheat grain to express and store hydrolytic enzymes capable of gluten detoxification. For this purpose, wheat scutellar calli were biolistically transformed to generate plants expressing a combination of glutenase genes for prolamin detoxification. Digestion of prolamins with barley endoprotease B2 (EP-HvB2) combined with Flavobacterium meningosepticum prolyl endopeptidase (PE-FmPep) or Pyrococcus furiosus prolyl endopeptidase (PE-PfuPep) significantly reduced (up to 67%) the amount of the indigestible gluten peptides of all prolamin families tested. Seven of the 168 generated lines showed inheritance of transgene to the T2 generation. Reversed phase high-performance liquid chromatography of gluten extracts under simulated gastrointestinal conditions allowed the identification of five T2 lines that contained significantly reduced amounts of immunogenic, celiac disease-provoking gliadin peptides. These findings were complemented by the R5 ELISA test results where up to 72% reduction was observed in the content of immunogenic peptides. The developed wheat genotypes open new horizons for treating celiac disease by an intraluminal enzyme therapy without compromising their agronomical performance.

Keywords

Celiac disease Gluten Glutenase Combined-enzyme therapy Wheat 

Notes

Acknowledgements

The authors would like to thank Ellison Mackenzie and Rhoda Brew-Appiah for laboratory assistance, Richa Gemini for the bioinformatics support, Pat Reisenauer for greenhouse assistance, Robert Zemetra for help with the wheat genetic transformation, and the two anonymous reviewers whose comments helped us in improving the manuscript.

Author contributions

S. Rustgi, D.v.W., S. Reinbothe, and B.L. designed the research; C.E.O., N.W., J.H.M., and S. Rustgi performed the research; C.E.O., N.W., J.H.M., D.v.W., and S. Rustgi analyzed the data; and S. Rustgi, C.E.O., B.L. and S. Reinbothe wrote the paper.

Funding information

This work received financial support by NIH grants 1R01 GM080749-01A2, and Clemson Faculty Succeeds grant 15-202-EQUIP-5701-430-1502211.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10142_2018_632_MOESM1_ESM.pdf (4.3 mb)
ESM 1 (PDF 4.30 mb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Crop and Soil SciencesWashington State UniversityPullmanUSA
  2. 2.Centro de Genómica Nutricional Agro-acuícola, CGNATemucoChile
  3. 3.Instituto de Investigaciones Agropecuarias (INIA)Centro Regional de Investigación CarillancaTemucoChile
  4. 4.Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & CytologyNortheast Normal UniversityChangchunChina
  5. 5.Laboratoire de Génétique Moléculaire des Plantes et Biologie Environnementale et Systemique (BEeSy), LBFAUniversité Grenoble-AlpesGrenoble cedex 9France
  6. 6.Clemson University Pee Dee Research and Education CenterFlorenceUSA

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