Summary
We have shown previously that hemoglobin greatly stimulates chick embryo cell proliferation in Eagle's minimal essential medium supplemented with horse serum. In the present study we compared the effects of horse serum plus 10 μM hemoglobin to those of fetal bovine serum on subcultures of chick embryo cells serially propagated at high cell densities. The cells became elongated in the presence of fetal bovine serum and their rate of proliferation progressively decreased, whereas they became polygonal in the presence of horse serum plus hemoglobin and proliferated well in successive cell passages. The polygonal cell obtained in the presence of horse serum plus hemoglobin rapidly elongated if cultured at low cell densities in the presence of fetal bovine serum, but, in contrast, elongated cells did not yield polygonal cells if cultured at low densities in the presence of horse serum plus hemoglobin. It is possible that the polygonal and elongated cells are undifferentiated cells and differentiating myogenic cells, respectively.
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Verger, C. Proliferation and morphology of chick embryo cells cultured in the presence of horse serum and hemoglobin. In Vitro 15, 587–592 (1979). https://doi.org/10.1007/BF02623394
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DOI: https://doi.org/10.1007/BF02623394