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Large-scale preparation of fluorescence multiplex host cell reactivation (FM-HCR) reporters
C G Piett1, T J Pecen1, D J Laverty1
1Department of Environmental Health, JBL Center for Radiation Sciences, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
Abstract:
Repair of DNA damage is a critical survival mechanism that affects susceptibility to various human diseases and represents a key target for cancer therapy. A major barrier to applying this knowledge in research and clinical translation has been the lack of efficient, quantitative functional assays for measuring DNA repair capacity in living primary cells. To overcome this barrier, we recently developed a technology termed 'fluorescence multiplex host cell reactivation' (FM-HCR). We describe a method for using standard molecular biology techniques to generate large quantities of FM-HCR reporter plasmids containing site-specific DNA lesions and using these reporters to assess DNA repair capacity in at least six major DNA repair pathways in live cells. We improve upon previous methodologies by (i) providing a universal workflow for generating reporter plasmids, (ii) improving yield and purity to enable large-scale studies that demand milligram quantities and (iii) reducing preparation time >ten-fold.
Insights
Researchers developed a new method, fluorescence multiplex host cell reactivation (FM-HCR), to efficiently measure DNA repair capacity in living cells. This breakthrough aids disease research and cancer therapy development.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- DNA damage repair is crucial for survival and disease susceptibility.
- Current methods for measuring DNA repair capacity in cells are inefficient and not quantitative.
- Lack of functional assays hinders clinical translation of DNA repair knowledge.
Purpose of the Study:
- To develop an efficient, quantitative functional assay for measuring DNA repair capacity in living primary cells.
- To overcome the barrier in applying DNA repair knowledge to research and clinical translation.
- To establish a universal workflow for generating DNA repair reporter plasmids.
Main Methods:
- Developed fluorescence multiplex host cell reactivation (FM-HCR) technology.
- Utilized standard molecular biology techniques to generate FM-HCR reporter plasmids with site-specific DNA lesions.
- Assessed DNA repair capacity across six major DNA repair pathways in live cells.
Main Results:
- Established a universal workflow for generating reporter plasmids.
- Improved yield and purity of reporter plasmids for large-scale studies.
- Reduced reporter plasmid preparation time more than tenfold.
Conclusions:
- FM-HCR is an efficient and quantitative method for assessing DNA repair capacity in live cells.
- This technology facilitates research into DNA repair mechanisms and their role in human diseases.
- FM-HCR is a valuable tool for advancing cancer therapy development and clinical translation.
