Molecular mechanisms of cellular proliferation in acute myelogenous leukemia by leptin

  • Authors:
    • Ju Young Kim
    • Hyun Ki Park
    • Jin Sun Yoon
    • Seo Ju Kim
    • Eun Shil Kim
    • Sung Heon Song
    • Jung Hye Choi
    • Byoung Kook Kim
    • Byoung Bae Park
    • Young Yiul Lee
  • View Affiliations

  • Published online on: May 1, 2010     https://doi.org/10.3892/or_00000773
  • Pages: 1369-1374
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Abstract

Leptin acts as a growth factor in normal cells as well as in various types of cancer cells. We investigated the effects of leptin on human acute myelogenous leukemia (AML) cells. Leptin stimulated the proliferation of HEL cells through the phosphorylation of STAT3 and ERK1/2. The blocking of STAT3 phosphorylation with the specific inhibitor, AG490, significantly reduced leptin-induced ERK1/2 phosphorylation and cellular proliferation, whereas the blocking of ERK1/2 activation by the specific ERK1/2 inhibitor, PD98059, did not affect the STAT3 phosphorylation or leptin-induced proliferation in HEL cells. Furthermore, knockdown of leptin receptor (OB-R) expression with stealth RNA interference (RNAi) reduced the leptin-induced proliferation of HEL cells and also significantly attenuated leptin-induced STAT3 and ERK1/2 activation. These results suggest that leptin promotes AML cell growth by activating STAT3 and MAPK, although not directly dependent on ERK.

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May 2010
Volume 23 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Kim JY, Park HK, Yoon JS, Kim SJ, Kim ES, Song SH, Choi JH, Kim BK, Park BB, Lee YY, Lee YY, et al: Molecular mechanisms of cellular proliferation in acute myelogenous leukemia by leptin . Oncol Rep 23: 1369-1374, 2010.
APA
Kim, J.Y., Park, H.K., Yoon, J.S., Kim, S.J., Kim, E.S., Song, S.H. ... Lee, Y.Y. (2010). Molecular mechanisms of cellular proliferation in acute myelogenous leukemia by leptin . Oncology Reports, 23, 1369-1374. https://doi.org/10.3892/or_00000773
MLA
Kim, J. Y., Park, H. K., Yoon, J. S., Kim, S. J., Kim, E. S., Song, S. H., Choi, J. H., Kim, B. K., Park, B. B., Lee, Y. Y."Molecular mechanisms of cellular proliferation in acute myelogenous leukemia by leptin ". Oncology Reports 23.5 (2010): 1369-1374.
Chicago
Kim, J. Y., Park, H. K., Yoon, J. S., Kim, S. J., Kim, E. S., Song, S. H., Choi, J. H., Kim, B. K., Park, B. B., Lee, Y. Y."Molecular mechanisms of cellular proliferation in acute myelogenous leukemia by leptin ". Oncology Reports 23, no. 5 (2010): 1369-1374. https://doi.org/10.3892/or_00000773