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Isolation and Functional Assessment of Human Breast Cancer Stem Cells from Cell and Tissue Samples
Published on: October 2, 2020
Existing drugs and their application in drug discovery targeting cancer stem cells
1Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, SAR, 999078, China.
Abstract:
Despite standard cancer therapies such as chemotherapy and targeted therapy have shown some efficacies, the cancer in many cases eventually relapses and metastasizes upon stopping the treatment. There is a small subpopulation of cancer cells within tumor, with specific characters similar to those found in stem cells. This group of cancer cells is known as tumor-initiating or cancer stem cells (CSCs), which have an ability to self-renew and give rise to cancer cell progeny. CSCs are related with drug resistance, metastasis and relapse of cancer, hence emerging as a crucial drug target for eliminating cancer. Rapid advancement of CSC biology has enabled researchers to isolate and culture CSCs in vitro, making the cells amenable to high-throughput drug screening. Recently, drug repositioning, which utilizes existing drugs to develop potential new indications, has been gaining popularity as an alternative approach for the drug discovery. As existing drugs have favorable bioavailability and safety profiles, drug repositioning is now actively exploited for prompt development of therapeutics for many serious diseases, such as cancer. In this review, we will introduce latest examples of attempted drug repositioning targeting CSCs and discuss potential use of the repositioned drugs for cancer therapy.
Insights
Cancer stem cells (CSCs) drive relapse and metastasis. This review explores drug repositioning strategies targeting CSCs to develop novel cancer therapies with improved efficacy and safety profiles.
Area of Science:
- Oncology
- Pharmacology
- Cancer Biology
Background:
- Standard cancer therapies often fail due to tumor relapse and metastasis.
- Cancer stem cells (CSCs) are a subpopulation responsible for tumor recurrence, drug resistance, and metastasis.
- Targeting CSCs is crucial for effective and durable cancer treatment.
Purpose of the Study:
- To review recent advancements in drug repositioning for targeting cancer stem cells (CSCs).
- To discuss the potential of repurposed drugs in overcoming CSC-mediated cancer relapse and metastasis.
- To highlight CSCs as a promising therapeutic target for novel cancer treatments.
Main Methods:
- Literature review of drug repositioning studies targeting CSCs.
- Analysis of in vitro and in vivo models for CSC drug screening.
- Evaluation of existing drugs for new anti-CSC indications.
Main Results:
- Identification of several existing drugs with potential anti-CSC activity.
- Demonstration of drug repositioning as a viable strategy for CSC-targeted cancer therapy.
- Highlighting the potential for faster drug development due to favorable safety profiles of repurposed drugs.
Conclusions:
- Drug repositioning offers a promising avenue for developing novel therapeutics against cancer stem cells.
- Repurposed drugs may provide safer and more rapidly deployable treatment options for overcoming cancer relapse and metastasis.
- Targeting CSCs through drug repositioning holds significant potential for improving patient outcomes in oncology.
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