Abstract
Production of the three hepatitis B surface (HBs) proteins was studied in a hepatoma cell line (PLC/PRF/5) and two HBs antigen secreting cell lines (HeLa and mouse L-cells), which had been transfected by a viral genome isolated by molecular cloning from PLC/PRF/5 chromosomal DNA. The DNA used for transfection contains the HBs-specific promoters and the enhancer which regulate the expression of HBs genes in the transfected cell lines. All three cell lines expressed well the small and middle HBs protein, but the larger pre S 1 containing protein was barely detectable in the L-cell. In vivo growth of the transfected HeLa cell as nude mouse tumour increased pre S 1 expression and suppressed secretion of HBsAg.
MeSH Terms
Animals
Cell Line
HeLa Cells/analysis,metabolism
Hepatitis B Surface Antigens/analysis,biosynthesis,metabolism
Humans
Intracellular Fluid/analysis
L Cells/analysis,metabolism
Liver Neoplasms, Experimental/analysis,metabolism
Mice
Mice, Nude
Tumor Cells, Cultured/analysis,metabolism
Chemicals
Hepatitis B Surface Antigens
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Marquardt O
Max-Planck-Institute of Biochemistry, Martinsried, Federal Republic of Germany.
Heermann K H
Seifer M
Gerlich W H
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