Biomedical subjects
Publications and source records attributed to R Favre.
Absorbed serum of a rabbit immunized with a suspension of cells of Hodgkins origin, allowed us to demonstrate a surface antigen on cells of Hodgkin origin. Where this antigen is situated in relation to those already described, notably in respect to the possible carcinoembryonic character, has yet to be determined.
Good immunoprotection was afforded by A9/SEWA somatic hybrid cells in the C3H mouse/C3H Py tumour system, confirming results previously obtained in the A.SW mouse/SEWA tumour system. However, in this study the immunogenicity decreased with increasing serial subculture of the hybrid line and concomitant chromosome loss.
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Various procedures for immunoprotection in the A-SW mouse SEWA tumour system were compared. Four types of protector agents were used: polyoma virus, allogeneic S724 cells, A9/SEWA hybrid cells and xenogeneic ST(py) cells. Several injection schedules were also employed. On the whole, reasonable immunoprotection was obtained. The results, when allogeneic hybrid or xenogeneic cells were used, were comparable with those obtained for polyoma virus. This indicates that the T.A.T.A. of the SEWA tumour had been well conserved. When polyoma virus alone was used as the protector agent, injection 7 days before the tumour challenge, or iterative injection, afforded better protection than a single injection on the day of challenge.
An ilvA mutation carried by a ø80i(lambda)dilv transducing phage complemented some ilvA mutations and did not complement others. Complementation was accompanied by appearance of threonine deaminase activity in vivo. These results divided the ilvA mutations into two sets which formerly appeared to define two cistrons.
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