The physicochemical properties of recombinant hepatitis B surface antigen (r-HBsAg), which was expressed in C127 mammalian cell were studied. Using roller bottle culture in DMEM supplemented with fetal bovine serum, 10–15 mg/L of r-HBsAg was produced with about 31% of purification yield. The purity of r-HBsAG by HPLC was 99.8% and electron microscopic examination showed homogeneous spherical particle with 22 nm in diameter, a morphological characteristic of HBsAg. The density of r-HBsAg by CsCl density gradient method was 1.19 g/ml and the isoelectric point by Mono PTM HR 5/20 column was 4.6. The analysis of subunit protein pattern using SDS-PAGE followed by scanning densitometry gave 81.3% of S protein and 18.7% of pre-S protein. Fluorophore-assisted-carbohydrate-electrophoresis analysis showed the relative amount of carbohydrate to protein was 1.7% and its major component was N-acetyl glucosamine, which was about 39% of total carbohydrate. The relative amount of lipid to protein determined by vanillin phosphoric acid method was 32.5% and its major component was phospholipid, which was about 70% of total lipid. The physicochemical properties of C127 mammalian cell-derived r-HBsAg are similar to those of p-HBsAg, suggesting that the r-HBsAg can be used in developing a new preventive vaccine against hepatitis B.
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Lee, Y.S., Kim, B.K. & Choi, E. Physicochemical properties of recombinant hepatitis B surface antigen expressed in mammalian cell (C127). Arch. Pharm. Res. 21, 521 (1998). https://doi.org/10.1007/BF02975368
- Recombinant hepatitis B surface antigen
- Physicochemical properties
- Mouse fibroblast cell (C127)
- Fluorophore-assisted carbohydrate electrophoresis