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. 1984;19(6):519-26.
doi: 10.1007/BF00403443.

Expression of macrophage functions in hybrids of a myeloma cell line with inflammatory macrophages: evidence for negative control mechanisms in the expression of macrophage functions

S Yamamoto, Y Higuchi

Expression of macrophage functions in hybrids of a myeloma cell line with inflammatory macrophages: evidence for negative control mechanisms in the expression of macrophage functions

S Yamamoto et al. Immunogenetics. 1984.

Abstract

Mouse inflammatory macrophages from C57BL/6N mice were fused with BALB/c mouse-derived myeloma cells (the CANS series). The hybrids in the early period after cell fusion (8 weeks) showed no macrophage functions (chemotaxis, EA and EAC rosette-forming abilities, phagocytosis or lysozyme production). EA rosette-forming ability was observed when these hybrids were treated with trypsin, whereas other macrophage functions were not. After prolonged culture, the hybrids (12 clones of 13 randomly selected) showed all the macrophage functions along with chromosome loss. Myeloma cell functions (kappa light chain production) were found in the young hybrids soon after cell fusion but were absent in the aged hybrids. These results indicated that reexpression of macrophage properties, except for EA rosette-forming abilities, takes place after the loss of chromosomes or genes repressing the expression of macrophage functions.

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