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Author Spotlight: Developing Novel Anticancer Therapeutics Targeting the DNA Damage Response
Published on: June 14, 2024
Recent Advances in Therapeutic Application of DNA Damage Response Inhibitors against Cancer
Stina George Fernandes1, Prachi Shah1, Ekta Khattar1
1Sunandan Divatia School of Science, SVKM's NMIMS (Deemed to be) University, Mumbai, India.
Abstract:
DNA's integrity is continuously challenged by intrinsic cellular processes and environmental agents. To overcome this genomic damage, cells have developed multiple signalling pathways collectively named as DNA Damage Response (DDR) and composed of three components: (i) sensor proteins, which detect DNA damage, (ii) mediators that relay the signal downstream and recruit the repair machinery and (iii) the repair proteins, which restore the damaged DNA. A flawed DDR and failure to repair the damage lead to the accumulation of genetic lesions and increased genomic instability, which is recognized as a hallmark of cancer. Cancer cells tend to harbor increased mutations in DDR genes and often have fewer DDR pathways than normal cells. This makes cancer cells more dependent on particular DDR pathways and thus become more susceptible to compounds inhibiting those pathways compared to normal cells, which have all the DDR pathways intact. Understanding the roles of different DDR proteins in the DNA damage response and repair pathways and the identification of their structures have paved the way for development of their inhibitors as targeted cancer therapy. In this review, we describe the major participants of various DDR pathways, their significance in carcinogenesis and focus on the inhibitors developed against several key DDR proteins.
Insights
The DNA Damage Response (DDR) pathway maintains genomic integrity. Inhibiting DDR pathways in cancer cells, which rely on them, offers a targeted therapy strategy.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- DNA integrity is crucial for cellular function and is constantly threatened by internal and external factors.
- The DNA Damage Response (DDR) is a complex network of signaling pathways involving sensors, mediators, and repair proteins that maintain genomic stability.
- Defects in DDR contribute to genomic instability and are a hallmark of cancer development.
Purpose of the Study:
- To review the key components of DDR pathways.
- To elucidate the role of DDR in carcinogenesis.
- To focus on the development of DDR protein inhibitors for targeted cancer therapy.
Main Methods:
- Literature review of major DDR pathways.
- Analysis of DDR protein functions in DNA damage response and repair.
- Examination of the significance of DDR in cancer development.
- Overview of inhibitors targeting key DDR proteins.
Main Results:
- DDR pathways are essential for detecting and repairing DNA damage.
- Dysfunctional DDR is implicated in the accumulation of genetic mutations and cancer.
- Cancer cells exhibit dependencies on specific DDR pathways, making them vulnerable to DDR inhibitors.
- Structural understanding of DDR proteins has enabled the development of targeted inhibitors.
Conclusions:
- Targeted inhibition of DDR pathways represents a promising strategy for cancer treatment.
- Understanding DDR mechanisms is critical for developing effective cancer therapies.
- DDR inhibitors exploit cancer cell-specific vulnerabilities to achieve therapeutic effects.
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