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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Adenoviral vector-based strategies for cancer therapy
Anurag Sharma1, Manish Tandon, Dinesh S Bangari
1Department of Comparative Pathobiology, and Bindley Bioscience Center, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA.
Abstract:
Definitive treatment of cancer has eluded scientists for decades. Current therapeutic modalities like surgery, chemotherapy, radiotherapy and receptor-targeted antibodies have varied degree of success and generally have moderate to severe side effects. Gene therapy is one of the novel and promising approaches for therapeutic intervention of cancer. Viral vectors in general and adenoviral (Ad) vectors in particular are efficient natural gene delivery systems and are one of the obvious choices for cancer gene therapy. Clinical and preclinical findings with a wide variety of approaches like tumor suppressor and suicide gene therapy, oncolysis, immunotherapy, anti-angiogenesis and RNA interference using Ad vectors have been quite promising, but there are still many hurdles to overcome. Shortcomings like increased immunogenicity, prevalence of preexisting anti-Ad immunity in human population and lack of specific targeting limit the clinical usefulness of Ad vectors. In recent years, extensive research efforts have been made to overcome these limitations through a variety of approaches including the use of conditionally-replicating Ad and specific targeting of tumor cells. In this review, we discuss the potential strengths and limitations of Ad vectors for cancer therapy.
Insights
Adenoviral (Ad) vectors show promise for cancer gene therapy, but challenges like immunogenicity and targeting must be addressed for effective clinical use.
Area of Science:
- Oncology
- Gene Therapy
- Virology
Background:
- Cancer treatment remains a significant challenge, with current methods having limited efficacy and severe side effects.
- Gene therapy offers a promising novel approach for cancer intervention.
- Adenoviral (Ad) vectors are efficient natural gene delivery systems, making them a primary choice for cancer gene therapy.
Purpose of the Study:
- To review the potential strengths and limitations of adenoviral (Ad) vectors in cancer therapy.
- To discuss advancements in overcoming Ad vector-related challenges for clinical application.
Main Methods:
- Review of clinical and preclinical findings utilizing Ad vectors for various cancer gene therapy strategies.
- Analysis of strategies to overcome Ad vector limitations, including enhanced targeting and conditional replication.
Main Results:
- Ad vectors have demonstrated promising results in preclinical and clinical studies for tumor suppressor gene therapy, suicide gene therapy, oncolysis, immunotherapy, anti-angiogenesis, and RNA interference.
- Key limitations include increased immunogenicity, pre-existing anti-Ad immunity in the population, and lack of specific tumor targeting.
Conclusions:
- Adenoviral vectors hold significant potential for cancer gene therapy but require further development to address immunogenicity and targeting issues.
- Ongoing research focuses on modifying Ad vectors for improved safety and efficacy in clinical settings.
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