Abstract

Glyceryl monooleate was used to induce heterokaryon formation between mouse LS fibroblasts and hen erythrocytes during 15 min incubation at 37 °C. Many of the heterokaryons that were formed contained haemoglobin since cell fusion occurred without complete haemolysis of the hen erythrocytes. Following fusion, the plasma membranes of the heterokaryons and their subcellular organelles were apparently intact and relatively undamaged. Although the results of individual experiments were variable, clones of viable hybrid cells were obtained on treatment of mouse 3T3 TK- fibroblasts and chinese hamster wg 3 IMP- fibroblasts with glyceryl monooleate up to 32 times more frequently than in untreated, control cultures. Karyogram analyses confirmed the presence of both sets of parental chromosomes in all hybrid cells studied. Clones of hybrid cells were isolated and subcultured successfully for several months in HAT medium.

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