Enucleation of mammalian cells by cytochalasin B. II. Formation of hybrid cells and heterokaryons by fusion of anucleate and nucleated cells

G. Poste, P. Reeve

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30 Scopus citations


The development of methods for the formation of hybrid cells and heterokaryons by virus-induced fusion of chemically-enucleated cells and nucleated cells has been described. Heterokaryons and hybrid cells formed by fusion of anucleate mouse peritoneal macrophages (MPM) and nucleated mouse L and human HEp-2 cells were identified by mixed haemadsorption, by their sensitivity to trypsin and by their capacity to ingest antibody-coated sheep red blood cells. The expression of macrophage markers in these cells declined rapidly after fusion. Hybrid cell and heterokaryon formation was identified in mixed cultures of anucleate L cells and nucleated MPM, and was accompanied by the reactivation of DNA synthesis in the macrophage nuclei. Other hybrids and heterokaryons were formed by virus-induced fusion of anucleate MPM and nucleated chick embryo erythrocytes and anucleate L cells and nucleated HEp-2 cells. The value of anucleate-nucleate cell hybrids in the study of metabolic and genetic regulation in mammalian cells is discussed.

Original languageEnglish (US)
Pages (from-to)287-294
Number of pages8
JournalExperimental Cell Research
Issue number2
StatePublished - Aug 1972


ASJC Scopus subject areas

  • Cell Biology

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