Growth of human bone marrow in vitro.

Attempts were made to establish human bone marrow (HBM) culture. Cell proliferation was triggered by medium conditioned by acute myelocytic leukemic (AML) cells exposed to 12-0-tetradecanoyl-phorbol-13-acetate (TPA). A 6-15 fold multiplication of myelomonocytic cells was obtained in tissue culture from HBM cells. Proliferation of granulocyte-macrophage colony forming cells (CFC-GM) occurred up to 30-fold. The morphology of the cells and cytochemical markers were investigated at all stages of the culture.