de Lichtervelde L, Antal CE, Boitano AE, Wang Y, Krastel P, Petersen F, Newton AC, Cooke MP, Schultz PG. Euphohelioscopin A is a PKC activator capable of inducing macrophage differentiation.
ACTA ACUST UNITED AC 2012;
19:994-1000. [PMID:
22921066 DOI:
10.1016/j.chembiol.2012.06.010]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 06/01/2012] [Accepted: 06/11/2012] [Indexed: 01/27/2023]
Abstract
To identify small molecules that selectively control hematopoietic stem cell differentiation, we performed an unbiased screen using primary human CD34(+) cells. We identified a plant-derived natural product, euphohelioscopin A, capable of selectively differentiating CD34(+) cells down the granulocyte/monocytic lineage. Euphohelioscopin A also inhibits proliferation and induces differentiation of the myeloid leukemia cell lines THP-1 and HL-60. Mechanistic studies revealed that euphohelioscopin A is an activator of protein kinase C (PKC), and that the promonocytic effects of this natural product are mediated by PKC activation. In addition to shedding insights into normal hematopoiesis, this work may ultimately facilitate the application of stem cell therapies to a host of myeloid dysfunctions.
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