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Ryk is essential for Wnt-5a-dependent invasiveness in human glioma

Mika Habu1, Hirofumi Koyama2, Michiko Kishida2

  • 1Department of Biochemistry and Genetics; Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences; Department of Pharmacy, Kagoshima Prefectural Satunan Hospital; Department of Oral and Maxillofacial Surgery, Kagoshima University Graduate School of Medical and Dental Sciences; Natural Science Centre for Research and Education, Kagoshima University; and Department of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, JapanDepartment of Biochemistry and Genetics; Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences; Department of Pharmacy, Kagoshima Prefectural Satunan Hospital; Department of Oral and Maxillofacial Surgery, Kagoshima University Graduate School of Medical and Dental Sciences; Natural Science Centre for Research and Education, Kagoshima University; and Department of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.

Journal of Biochemistry
|March 14, 2014
PubMed

Insights

Wnt-5a signaling, through receptor Ryk, drives glioblastoma cell invasion by increasing MMP-2 activity. Targeting Ryk and Frizzled-2 may offer new glioblastoma treatment strategies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Glioblastoma exhibits significant invasiveness, yet the underlying mechanisms remain poorly understood.
  • The Wnt signaling pathway regulates crucial cellular processes, and its dysregulation is linked to various diseases.
  • Wnt-5a overexpression in glioma cells correlates with increased motility and invasion via matrix metalloproteinase (MMP)-2.

Purpose of the Study:

  • To identify the specific receptors mediating Wnt-5a cellular responses in glioma cells.
  • To elucidate the role of Wnt-5a receptors in glioblastoma invasion.
  • To explore potential therapeutic targets for controlling glioma cell invasion.

Main Methods:

  • Investigated the role of Wnt-5a receptors, specifically receptor-like tyrosine kinase (Ryk) and Ror2, in glioma cell invasion.
  • Utilized knockdown techniques to assess the impact of receptor suppression on MMP-2 activity and invasive behavior.
  • Correlated the expression levels of Wnt-5a, Frizzled-2, and Ryk with WHO histological grades in human glioma tissues.

Main Results:

  • Knockdown of Ryk, but not Ror2, significantly suppressed MMP-2 activity and Wnt-5a-dependent invasion in glioma cells.
  • Ryk is crucial for Wnt-5a-mediated induction of MMP-2 and invasion in glioma-derived cells.
  • Expression of Wnt-5a, Frizzled-2, and Ryk correlated with higher WHO histological grades in human glioma tissues.

Conclusions:

  • Ryk plays a critical role in Wnt-5a-dependent glioblastoma invasion, suggesting a novel patho-physiological function in adult cancer.
  • Frizzled-2 and Ryk represent potential therapeutic targets for managing Wnt-5a-driven human glioma invasion.
Keywords:
MMP-2RykWnt-5a signalgliomainvasion

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