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Brain tumour cells interconnect to a functional and resistant network.

Matthias Osswald1,2, Erik Jung1,2, Felix Sahm3,4

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Astrocytoma brain tumors form networks using tumor microtubes for invasion and communication. Disrupting these networks may overcome treatment resistance in astrocytomas.

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Area of Science:

  • Neuro-oncology
  • Cell Biology
  • Cancer Research

Background:

  • Astrocytic brain tumors, such as glioblastomas, are aggressive and infiltrative.
  • Current treatments often face challenges due to tumor resistance and spread.

Purpose of the Study:

  • To investigate the role of ultra-long membrane protrusions in astrocytoma progression.
  • To explore the potential of targeting these structures for therapeutic benefit.

Main Methods:

  • Microscopy to visualize tumor cell protrusions (tumor microtubes).
  • Analysis of intercellular communication and network formation.
  • Assessment of the impact of microtubes on invasion, proliferation, and radioresistance.
  • Investigating the role of neuronal growth-associated protein 43 (GAP-43).

Main Results:

  • Astrocytoma cells form ultra-long tumor microtubes enabling invasion, proliferation, and long-distance interconnection.
  • These networks facilitate multicellular communication via gap junctions and allow for network repair.
  • Microtube-connected cells exhibit radioresistance, while unconnected cells do not.
  • Neuronal growth-associated protein 43 (GAP-43) is crucial for microtube formation and function.
  • Oligodendroglial tumors lack this microtube-based networking mechanism.

Conclusions:

  • Astrocytomas form functional multicellular networks through tumor microtubes.
  • Targeting and disconnecting these tumor microtubes presents a novel strategy to combat treatment resistance in astrocytomas.