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  • Title: Retinoic acid-induced granulocytic differentiation of HL-60 myeloid leukemia cells is mediated directly through the retinoic acid receptor (RAR-alpha).
    Author: Collins SJ, Robertson KA, Mueller L.
    Journal: Mol Cell Biol; 1990 May; 10(5):2154-63. PubMed ID: 1970118.
    Abstract:
    Retinoic acid (RA) induces terminal granulocytic differentiation of the HL-60 promyelocytic leukemia cell line as well as certain other human myeloid leukemias. Specific RA receptors that are members of the steroid-thyroid hormone superfamily of nuclear transcription factors have recently been identified. We developed an HL-60 subclone that was relatively resistant to RA-induced differentiation. Specific nuclear RA receptors in this RA-resistant subclone had a decreased affinity for RA and exhibited a lower molecular weight compared with nuclear RA receptors from the RA-sensitive parental HL-60 cells. Retroviral vector-mediated transduction of a single copy of the RA receptor (RAR-alpha) into this RA-resistant HL-60 subclone restored the sensitivity of these cells to RA. These observations indicate that RAR-alpha plays a critical and central role in mediating RA-induced terminal differentiation of HL-60 leukemia cells.
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