Related Experiment Video
Updated: May 6, 2026

Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
Published on: May 23, 2025
Synthetic genetic targeting of genome instability in cancer
Babu V Sajesh1, Brent J Guppy, Kirk J McManus
1Manitoba Institute of Cell Biology, Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba R3E 0V9, Canada. mcmanusk@cc.umanitoba.ca.
Abstract:
Cancer is a leading cause of death throughout the World. A limitation of many current chemotherapeutic approaches is that their cytotoxic effects are not restricted to cancer cells, and adverse side effects can occur within normal tissues. Consequently, novel strategies are urgently needed to better target cancer cells. As we approach the era of personalized medicine, targeting the specific molecular defect(s) within a given patient's tumor will become a more effective treatment strategy than traditional approaches that often target a given cancer type or sub-type. Synthetic genetic interactions are now being examined for their therapeutic potential and are designed to target the specific genetic and epigenetic phenomena associated with tumor formation, and thus are predicted to be highly selective. In general, two complementary approaches have been employed, including synthetic lethality and synthetic dosage lethality, to target aberrant expression and/or function associated with tumor suppressor genes and oncogenes, respectively. Here we discuss the concepts of synthetic lethality and synthetic dosage lethality, and explain three general experimental approaches designed to identify novel genetic interactors. We present examples and discuss the merits and caveats of each approach. Finally, we provide insight into the subsequent pre-clinical work required to validate novel candidate drug targets.
Insights
Novel cancer therapies leverage synthetic lethality and synthetic dosage lethality to selectively target tumor cells. These approaches exploit specific genetic interactions, offering a more precise strategy than traditional chemotherapy with fewer side effects.
Area of Science:
- Oncology
- Genetics
- Pharmacology
Background:
- Cancer remains a leading global cause of mortality.
- Current chemotherapies often cause severe side effects due to non-specific cytotoxic effects on normal tissues.
- There is a critical need for novel cancer treatment strategies with improved tumor cell targeting.
Purpose of the Study:
- To discuss the concepts of synthetic lethality and synthetic dosage lethality for targeted cancer therapy.
- To explain experimental approaches for identifying novel genetic interactors in cancer.
- To provide insight into pre-clinical validation of drug targets identified through synthetic genetic interactions.
Main Methods:
- Review of synthetic lethality and synthetic dosage lethality concepts.
- Explanation of three general experimental approaches for identifying genetic interactors.
- Presentation and discussion of examples, merits, and caveats of each approach.
Main Results:
- Synthetic genetic interactions, including synthetic lethality and synthetic dosage lethality, offer highly selective therapeutic potential.
- These strategies target specific genetic and epigenetic alterations driving tumor formation.
- The study outlines methods for discovering and validating novel drug targets based on these interactions.
Conclusions:
- Synthetic lethality and synthetic dosage lethality represent promising avenues for personalized cancer medicine.
- These approaches aim to minimize off-target effects and improve treatment efficacy.
- Further pre-clinical validation is essential for translating these findings into clinical applications.
More Related Videos
Related Concept Videos
Targeted Cancer Therapies
There are several types of targeted therapies against...
Targeted Cancer Therapies
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes II: Tumor Suppressor Genes
In-vitro Mutagenesis
Cancer

