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In Vitro Establishment of a Genetically Engineered Murine Head and Neck Cancer Cell Line using an Adeno-Associated Virus-Cas9 System
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In Vitro Establishment of a Genetically Engineered Murine Head and Neck Cancer Cell Line using an Adeno-Associated Virus-Cas9 System

Published on: January 9, 2020

Novel adenoviral gene delivery system targeted against head and neck cancer

Daqing Li1, Wei Guang, Waleed M Abuzeid

  • 1Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA. lidaqing@mail.med.upenn.edu

The Laryngoscope
|January 8, 2008
PubMed
Abstract

Insights

A new adenovirus vector targets head and neck squamous cell carcinoma (HNSCC) by binding to the Hsp47 biomarker. This targeted approach enhances gene therapy efficacy and reduces systemic toxicity for HNSCC treatment.

Area of Science:

  • Oncolytic Virotherapy
  • Molecular Biology
  • Biotechnology

Background:

  • Adenovirus-mediated gene therapy faces limitations due to non-specific viral tropism and systemic toxicity.
  • Targeting tumor-specific cell surface biomarkers can improve adenovirus vector specificity and safety.
  • Hsp47 is identified as a potential biomarker for head and neck squamous cell carcinoma (HNSCC).

Purpose of the Study:

  • To develop and evaluate a novel recombinant adenovirus vector (Ad5-Flag-LDS) engineered for targeted gene delivery.
  • To assess the efficacy of Ad5-Flag-LDS in targeting Hsp47-expressing HNSCC cells.
  • To investigate the potential of Hsp47-targeted adenovirus for clinical gene therapy applications.

Main Methods:

  • Determined Hsp47 cell surface expression in HNSCC cell lines and controls.
  • Assessed colocalization of the LDS peptide and Hsp47 via immunocytochemistry.
  • Evaluated targeted gene transfer using blocking assays and immunofluorescence in mixed cell populations.

Main Results:

  • HNSCC cells exhibited significantly higher Hsp47 expression compared to control cells.
  • Ad5-Flag-LDS demonstrated specific binding and colocalization with Hsp47, leading to enhanced transgene expression.
  • Blocking Hsp47 biomarkers abrogated transgene expression, confirming Hsp47's dominant role in targeting.
  • Targeting selectivity was maintained in mixed cell populations, favoring Hsp47-expressing cells.

Conclusions:

  • Ad5-Flag-LDS exhibits enhanced targeting capabilities for HNSCC via Hsp47 biomarker recognition.
  • This targeted adenovirus vector represents a promising strategy for clinical gene therapy in HNSCC.
  • The Hsp47-targeting approach may be applicable to other tumor types expressing this biomarker.

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