Reduction of Allergenicity of Litchi chinensis Flowers Pollen Protein Conjugated with Polysaccharide by Maillard Reaction

Authors

  • Nitai Roy Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • G. Talukdar Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • I. Hossain Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • M. Shariar Shovon Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • N. K. Sana Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • S. R. Kabir Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • K. K. Biswas Department of Biochemistry & Molecular Biology, University of Rajshahi, Rajshahi-6205, Bangladesh.
  • Ranajit Kumar Shaha Department of Agro-Industry, Faculty of Agro-Industry & Natural Resources, University Malaysia Kelantan, Jel Campus, 17600 Jeli, Kelantan, Malaysia.

Keywords:

Litchi chinensis (Litchi), sensitization, Swiss albino mice, Eosinophils, Neutrophils

Abstract

Background: Allergy to pollen from gymnosperms is well documented in the west. The objective was to define the allergologic protein from Litchi chinensis (Litchi) pollen and conjugate the protein with polysaccharides by Maillard reaction to reduce the allergic effect of that protein.

Methods: Total soluble proteins were extracted from the pollen of Litchi flower pollen and subjected to ammonium sulphate precipitation at 80% saturation. Pollen antigen from Litchi chinensis (Litchi) was prepared by gel cutting method and characterized by biochemical and designated by LFPP. The homogeneity of this protein was demonstrated by a single band on SDS-PAGE. The protein then conjugated with galactomannan through Maillard Reaction. The resulting purified pollen protein and conjugated protein were administered to the Swiss albino mice as amount of 5.8mg/kg body weight.

Results: The total protein was then separated on a 12% SDS-Polyacrylamide gel which revealed 5 bands between molecular weight range of 29kDa and 69kDa. Each band was recovered from the gel by electroelution and sent for skin tests. 28kDa proteins was the only allergenic protein while others were not shown reactivity in patients. Intraperitoneal injection of the purified protein (LFPP) caused a significant rise in the levels of neutrophils (38-81%) and eosinophils (3-14%) compared to control (P<0.001) whereas conjugated protein caused only a 2% increase of both neutrophils and eosinophils level. On the other hand treatment with LFPP-galactomannan conjugate causes no such change in physical appearance with eosinophils and neutrophils level.

Conclusion: The present study demonstrates that the protein extracted and purified from Litchi flowers pollen has been recognized as a new allergen from Bangladesh for the first time and the allergic effects can be reduced by conjugation with polysaccharides.

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References

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Published

2012-04-01

How to Cite

Roy, N., Talukdar, G., Hossain, I., Shovon, M. S., Sana, N. K., Kabir, S. R., Biswas, K. K., & Shaha, R. K. (2012). Reduction of Allergenicity of Litchi chinensis Flowers Pollen Protein Conjugated with Polysaccharide by Maillard Reaction. Advances in BioScience, 3(2), 90–98. Retrieved from https://journals.sospublication.co.in/ab/article/view/72

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