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Published on: March 28, 2018
Effects of non-B DNA sequences on transgene expression
Hiroyuki Kamiya1, Hitomi Goto, Hideyoshi Harashima
1Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo 060-0812, Japan. hirokam@pharm.hokudai.ac.jp
Journal of Bioscience and Bioengineering
|July 7, 2009
Summary
Unusual DNA conformations, like Z-DNA and B'-DNA, can significantly enhance gene transcription. Introducing these non-B DNA sequences into a beta-actin promoter boosted transgene expression in cells and mouse livers.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- DNA structure and conformation play a critical role in regulating gene expression.
- Unusual DNA conformations, beyond the standard B-DNA form, are known to exist but their impact on gene transcription is not fully understood.
Purpose of the Study:
- To investigate the effect of specific non-B DNA conformations on transgene expression.
- To determine if introducing sequences that adopt B' and Z conformations can enhance gene transcription.
Main Methods:
- Engineered DNA sequences, A(30) (B' conformation) and (CG)(15) (Z conformation), were inserted into a beta-actin promoter.
- Luciferase reporter plasmids with the modified promoters were created.
- Transfection into NIH3T3 cells via electroporation and delivery into mouse livers via hydrodynamics-based injection were performed.
Main Results:
- The (CG)(15) sequence (Z-DNA) significantly increased luciferase expression compared to the control.
- The A(30) sequence (B'-DNA) also showed a trend towards enhanced gene expression.
- Non-B DNA sequences demonstrably influenced transgene expression levels.
Conclusions:
- Non-B DNA conformations can serve as potent enhancers of gene transcription.
- The strategic use of unusual DNA sequences offers a novel approach to improve transgene expression in gene therapy and research applications.
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