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Midkine, a heparin-binding growth factor, produced by the host enhances metastasis of Lewis lung carcinoma cells

Ragaa H M Salama1, Hisako Muramatsu, Peng Zou

  • 1Department of Biochemistry, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.

Cancer Letters
|May 10, 2005
PubMed

Insights

Midkine (MK) promotes tumor growth and metastasis. Mice lacking the midkine gene showed reduced lung metastasis, indicating MK is a crucial host factor in cancer spread.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Midkine (MK) is a heparin-binding growth factor implicated in tumor cell proliferation.
  • Tumor-expressed MK contributes to cancer growth both in vitro and in vivo.

Purpose of the Study:

  • To investigate the role of midkine as a host factor in tumor metastasis.
  • To evaluate the impact of midkine deficiency on spontaneous lung metastasis.

Main Methods:

  • Utilized genetically modified mice deficient in the midkine gene.
  • Subcutaneously implanted Lewis lung carcinoma cells in wild-type and midkine-deficient mice.
  • Assessed spontaneous lung metastasis extent and in vitro cell migration.

Main Results:

  • Mice deficient in midkine exhibited significantly reduced spontaneous lung metastasis compared to wild-type controls.
  • Lewis lung carcinoma cells showed enhanced migration in vitro, which was strongly promoted by midkine.
  • Midkine functions as a host factor that facilitates tumor cell migration and metastasis.

Conclusions:

  • Midkine plays a significant role in promoting tumor metastasis, acting as a host factor.
  • Targeting midkine, produced by both tumor and host cells, represents a potential therapeutic strategy for cancer treatment.

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