When RNA goes off script: ensuring transcript fidelity in transgene expression.

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• Plasmids are essential tools in molecular biology for cloning, overexpression, and genetic manipulation.
• The fidelity of RNA transcripts produced from plasmids is often assumed rather than verified.
• Plasmid backbone sequences, tags, and optimized regions can contain unintended regulatory elements.

Purpose of the Study:

• To highlight instances where plasmids have led to erroneous experimental results and interpretations.
• To examine the mechanisms and impact of plasmid-associated expression artifacts.
• To propose strategies for mitigating these artifacts and improving experimental rigor.

Main Methods:

• Review of published literature documenting plasmid-induced expression artifacts.
• Analysis of potential cryptic promoters and splice sites within common plasmid components.
• Discussion of case studies illustrating the consequences of undetected expression errors.

Main Results:

• Identified numerous published examples where unexpected transcripts and proteins arose from standard plasmid usage.
• Demonstrated how these artifacts can lead to misinterpretation of gene function and experimental outcomes.
• Highlighted the potential for these errors to propagate into significant research findings and clinical applications.

Conclusions:

• The assumption of perfect plasmid transcript fidelity is frequently incorrect and can compromise research integrity.
• Implementing strategies to detect and prevent plasmid-associated artifacts is essential for reliable scientific discovery.
• Advocating for community standards that include depositing full plasmid sequences and using RNA-seq for transcript verification is critical.