K. Watanabe et al., GROWTH-STIMULATION WITH HONEY ROYAL JELLY DIII PROTEIN OF HUMAN LYMPHOCYTIC CELL-LINES IN A SERUM-FREE MEDIUM, Biotechnology techniques, 10(12), 1996, pp. 959-962
The growth stimulating effects of a royal jelly protein (DIII protein)
were studied. The DIII protein stimulated the growth of five human ly
mphocytic cell lines in serum-free conditions, Cell cycle analysis sho
wed that U-937 cells cultured with the DIII protein did not arrest to
the Ct phase, Furthermore, a binding assay using europium-labeled DIII
protein showed U-937 cells had a large number of low affinity recepto
rs on the cell surface.