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Estimating genome-wide off-target effects for pyrrole-imidazole polyamide binding by a pathway-based expression
Jason Lin1,2, Sakthisri Krishnamurthy3, Hiroyuki Yoda3
1Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, Chuo-ku, Chiba, Japan.
Plos One
|April 10, 2019
Summary
This study introduces a new method to predict off-target effects of DNA-binding polyamides using gene expression profiling. This approach helps identify potential side effects before clinical use, improving drug safety.
Area of Science:
- Pharmaceutical research
- Genomics
- Toxicology
Background:
- DNA-binding molecules like polyamides are promising pharmaceutical leads but can cause off-target effects due to non-unique genomic binding.
- Existing methods struggle to address the issue of off-target binding and its associated side effects.
Purpose of the Study:
- To develop an analytical method for inferring off-target binding of N-methylpyrrole-N-methylimidazole polyamides.
- To create a side effect prediction engine for systematic screening of candidate polyamides.
- To identify biochemical pathways sensitive to polyamide treatment for predicting off-target effects.
Main Methods:
- Utilized expression profiling to probe the impact of polyamides on biochemical pathways.
- Developed a prediction engine to assess potential clinical side effects based on expression changes.
- Validated predicted side effects, such as altered aspartate transaminase levels, in animal models (ICR and nude mice).
Main Results:
- The developed method successfully infers off-target binding by analyzing impacts on biochemical pathways.
- The side effect prediction engine identified potential adverse effects.
- Animal experiments corroborated predicted side effects, including changes in aspartate transaminase levels.
Conclusions:
- This study presents a novel analytical method for inferring off-target binding and predicting side effects of polyamides.
- The approach offers a systematic way to screen polyamides, enhancing the safety of pharmaceutical development.
- The findings contribute to addressing the challenge of off-target effects in DNA-binding molecule research.
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