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Updated: Jun 23, 2026
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Combining Intravital Fluorescent Microscopy (IVFM) with Genetic Models to Study Engraftment Dynamics of Hematopoietic Cells to Bone Marrow Niches
Published on: March 21, 2017
The Xpc gene markedly affects cell survival in mouse bone marrow
Joshua L Fischer1, M A Suresh Kumar, Travis W Day
1Department of Microbiology and Walther Oncology Center, Indiana University Simon Cancer Center and Walther Cancer Institute, Indianapolis, 46202, USA.
Mutagenesis
|April 18, 2009
Summary
The XPC protein is crucial for DNA repair. XPC-deficient mice showed significantly higher sensitivity to carboplatin chemotherapy, indicating XPC
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- The XPC protein, encoded by the xeroderma pigmentosum Xpc gene, is essential for global genomic nucleotide excision repair (G-NER).
- Previous research suggested XPC and G-NER play a minor role in cell survival post-DNA damage, primarily using fibroblast models.
- The role of XPC in bone marrow repair following DNA damage has not been extensively studied.
Purpose of the Study:
- To investigate the role of the XPC protein in bone marrow sensitivity to DNA damage induced by carboplatin.
- To evaluate the contribution of G-NER to overall cell survival in the context of DNA-damaging chemotherapy agents.
Main Methods:
- Induction of DNA damage in Xpc-/- and wild-type mice using carboplatin.
- Assessment of bone marrow sensitivity using multiple independent methods.
- Monitoring survival rates of Xpc-/- and wild-type mice post-carboplatin treatment.
Main Results:
- Xpc-/- bone marrow exhibited approximately 10-fold greater sensitivity to carboplatin compared to wild-type bone marrow.
- A significant survival difference was observed, with 12/20 Xpc-/- mice dying versus 0/20 wild-type mice.
- These findings challenge previous assumptions about the limited role of XPC in DNA damage response.
Conclusions:
- Global genomic nucleotide excision repair (G-NER), mediated by XPC, significantly contributes to cell survival following DNA damage.
- XPC gene status and G-NER function may be critical determinants of patient response to DNA-damaging chemotherapies like carboplatin.
- Altered cell cycle regulation and DNA damage signaling pathways in XPC-deficient cells likely contribute to increased sensitivity and mortality.
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