Abstract
Embryogenic cell suspension cultures of Santalum album were transformed with Agrobacterium tumefaciens harboring pD35SHER plant expression vector having hepatitis B small surface antigen (HBsAg) with a C-terminal ER retention signal. The transformed colonies were selected on culture medium supplemented with kanamycin and subsequently the transgenic nature of these colonies was confirmed by PCR analysis. The expression of HBsAg was confirmed by RT-PCR analysis and Western blot analysis and the expression was quantified using monoclonal antibody-based ELISA. Cell suspension cultures were initiated from the colony with expression of 11.09 μg(HBsAg) g−1(f.m.). To further increase the expression of HBsAg, transgenic S. album suspensions were cultured on media with various medium additives and cells growing in medium with 30 mM trehalose showed the expression of 19.95 μg(HBsAg) g−1(f.m.).
Abbreviations
- ELISA:
-
enzyme linked immunosorbent assay
- HBsAg:
-
hepatitis B surface antigen
- HER:
-
hepatitis B small surface antigen coding ‘s’ gene tagged with a C-terminal ER retention signal
- RT-PCR:
-
reverse transcriptase-polymerase chain reaction
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Acknowledgements
Authors thank Dr C.J. Revathi, Shantha Biotechnics Ltd, Hyderabad, for providing the ’s’ gene coding for HBsAg.
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Shekhawat, U.K.S., Ganapathi, T.R. & Srinivas, L. Expression of hepatitis B small surface antigen in Santalum album embryogenic cell suspension cultures. Biol Plant 54, 720–724 (2010). https://doi.org/10.1007/s10535-010-0128-6
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DOI: https://doi.org/10.1007/s10535-010-0128-6