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Updated: Aug 15, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Individualised cancer therapeutics: dream or reality? Therapeutics construction
Yuqiao Shen1, Neil Senzer, John Nemunaitis
1Mary Crowley Medical Research Center, Dallas, TX 75201, USA.
Abstract:
The analysis of DNA microarray and proteomic data, and the subsequent integration into functional expression sets, provides a circuit map of the hierarchical cellular networks responsible for sustaining the viability and environmental competitiveness of cancer cells, that is, their robust systematics. These technologies can be used to 'snapshot' the unique patterns of molecular derangements and modified interactions in cancer, and allow for strategic selection of therapeutics that best match the individual profile of the tumour. This review highlights technology that can be used to selectively disrupt critical molecular targets and describes possible vehicles to deliver the synthesised molecular therapeutics to the relevant cellular compartments of the malignant cells. RNA interference (RNAi) involves a group of evolutionarily conserved gene silencing mechanisms in which small sequences of double-stranded RNA or intrinsic antisense RNA trigger mRNA cleavage or translational repression, respectively. Although RNAi molecules can be synthesised to 'silence' virtually any gene, even if upregulated, a mechanism for selective delivery of RNAi effectors to sites of malignant disease remains challenging. The authors will discuss gene-modified conditionally replicating viruses as candidate vehicles for the delivery of RNAi.
Insights
This study reviews how DNA microarray and proteomic data reveal cancer cell networks. It highlights RNA interference (RNAi) and gene-modified viruses for targeted cancer therapy delivery.
Area of Science:
- Oncology
- Molecular Biology
- Bioinformatics
Background:
- Cancer cells possess complex hierarchical networks crucial for survival and competitiveness.
- Analyzing molecular data like DNA microarrays and proteomics offers insights into these networks.
- Targeted therapies require understanding individual tumor profiles and molecular derangements.
Purpose of the Study:
- To review technologies for analyzing cancer cell networks and identifying therapeutic targets.
- To discuss methods for selective disruption of molecular targets in cancer cells.
- To explore delivery vehicles for synthesized molecular therapeutics, focusing on RNA interference (RNAi).
Main Methods:
- Integration of DNA microarray and proteomic data into functional expression sets.
- Utilizing RNA interference (RNAi) for gene silencing mechanisms.
- Investigating gene-modified conditionally replicating viruses as delivery vehicles.
Main Results:
- Functional expression sets provide a circuit map of cancer cell networks.
- RNAi offers a mechanism to silence specific genes, including those upregulated in cancer.
- Gene-modified viruses show potential for targeted delivery of RNAi to malignant cells.
Conclusions:
- Understanding cancer cell networks through integrated data analysis is key for personalized therapy.
- RNAi technology holds promise for cancer treatment, but delivery remains a challenge.
- Conditionally replicating viruses are promising candidates for the selective delivery of RNAi therapeutics.
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