Nisin-induced expression of recombinant T cell epitopes of major Japanese cedar pollen allergens in Lactococcus lactis.
Japanese cedar pollinosis is a seasonal allergic disease caused by two major pollen allergens: Cry j 1 and Cry j 2 antigens. To develop an oral vaccine to treat pollinosis, we constructed recombinant Lactococcus lactis harboring the gene encoding fused T cell epitopes from the Cry j 1 and Cry j 2 antigens. The recombinant T cell epitope peptide was designed to contain the fused cholera toxin B subunit as an adjuvant and a FLAG tag at the C-terminus. An expression plasmid was constructed by inserting the T cell epitope peptide gene into the multiple cloning sites of plasmid pNZ8148, an Escherichia coli-L. lactis shuttle vector. The constructed plasmid was transformed into L. lactis NZ9000 for expression induced by nisin, an antibacterial peptide from L. lactis. The expression of the epitope peptide was induced with 10-40 ng/mL nisin, and the expressed T cell epitope peptide was detected by western blot analysis using an anti-FLAG antibody and an antibody against the T cell epitopes. The concentration of the epitope peptide was estimated to be ~ 22 mg/L of culture in the presence of 40 ng/mL nisin, although it varied depending on the nisin concentration, the culture time, and the bacterial concentration when nisin was added. The expression of the recombinant epitope peptide in L. lactis, an organism generally recognized as safe, as demonstrated in this study, may contribute to the development of an oral vaccine for the treatment of pollinosis.
['Van Hoang|Vinh|V|', 'Ochi|Takahumi|T|', 'Kurata|Kentaro|K|', 'Arita|Yutaka|Y|', 'Ogasahara|Yusuke|Y|', 'Enomoto|Keiichi|K|http://orcid.org/0000-0002-4563-4539']
D000276:Adjuvants, Immunologic D000485:Allergens D001428:Bacterial Vaccines D002772:Cholera Toxin D032485:Cryptomeria D018984:Epitopes, T-Lymphocyte D004926:Escherichia coli D006801:Humans D007073:Immunoglobulin E D013294:Lactococcus lactis D009561:Nisin D010940:Plant Proteins D010957:Plasmids D011058:Pollen D011994:Recombinant Proteins D006255:Rhinitis, Allergic, Seasonal
T cell epitope Japanese cedar pollen allergen Lactococcus lactis Nisin