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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Megakaryocytes derived from CD34-positive cord blood cells produce interleukin-8.

In a serum-free liquid culture, thrombopoietin (TPO) selectively stimulated the growth of megakaryocytic cells from CD34-positive cord blood cells. Using these cultured cells, we investigated cytokine production by human megakaryocytes. Day 10 megakaryocytes (2 x 10(5)) secreted > 1000 pg/ml of interleukin (IL)-8, in contrast to small amounts of IL-1beta and IL-6. A time-course study showed that the IL-8 production of megakaryocytes occurred at the late phase of the culture period. The megakaryocyte-conditioned medium had the chemotactic potential of polymorphonuclear leucocytes, which was abrogated by the addition of anti-IL-8 antibody, suggesting the secretion of biologically active IL-8. The combination of TPO and IL-1alpha was required for a significant augmentation of the IL-8 secretion. Direct evidence for IL-8 synthesis in megakaryocytes was provided by reverse transcription-polymerase chain reaction on purified CD41b+ cells and by the detection of intracellular IL-8 in CD41b+ cells. These results suggest that TPO stimulates not only the proliferation and differentiation of the progenitors capable of megakaryocytic lineage expression but also IL-8 release by the megakaryocytic cells with the aid of IL-1.[1]


  1. Megakaryocytes derived from CD34-positive cord blood cells produce interleukin-8. Higuchi, T., Koike, K., Sawai, N., Mwamtemi, H.H., Takeuchi, K., Shiohara, M., Kikuchi, T., Yasui, K., Ito, S., Yamagami, O., Sasaki, Y., Okumura, N., Kato, T., Miyazaki, H., Ikeda, M., Yamada, M., Komiyama, A. Br. J. Haematol. (1997) [Pubmed]
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