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Antibody-Antisense Oligonucleotide Conjugate Downregulates a Key Gene in Glioblastoma Stem Cells

Amy E Arnold1, Elise Malek-Adamian2, Phuong U Le3

  • 1Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada.

Molecular Therapy. Nucleic Acids
|June 3, 2018
PubMed

Insights

Researchers developed novel antibody-antisense oligonucleotide conjugates to target and reduce FAM107A expression in glioblastoma stem cells, offering a new therapeutic strategy for brain cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Neuroscience

Background:

  • Glioblastoma stem cells (GSCs) are aggressive, treatment-resistant cells driving brain cancer invasion.
  • Downregulated in renal cell carcinoma (DRR), also known as FAM107A, is a key driver of GSC invasion.

Purpose of the Study:

  • To develop and evaluate antibody-antisense oligonucleotide (AON) conjugates targeting DRR/FAM107A in GSCs.
  • To establish a novel therapeutic strategy for glioblastoma by targeting cancer stem cells.

Main Methods:

  • Antibodies against GSC antigens (CD44, EphA2) were conjugated to chemically modified AONs (DNA/2'-deoxy-2'-fluoro-beta-D-arabinonucleic acid chimeras).
  • The conjugates were designed for enhanced nuclease stability and mRNA affinity to target DRR/FAM107A.

Main Results:

  • The antibody-AON conjugates demonstrated successful internalization and accumulation within patient-derived GSCs.
  • Significant reduction in DRR/FAM107A expression was observed in GSCs treated with the conjugates.

Conclusions:

  • This study presents the first antibody-antisense approach specifically targeting cancer stem cells.
  • The developed conjugates show promise as a novel therapeutic modality for glioblastoma by targeting GSC-specific drivers.
Keywords:
FAM107Aantibody conjugatesantisense oligonucleotidesgene therapyglioblastoma stem cellstargeted therapies

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