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Updated: May 8, 2026
A Luciferase-fluorescent Reporter Influenza Virus for Live Imaging and Quantification of Viral Infection
Published on: August 14, 2019
Sequence-specific imaging of influenza A mRNA in living infected cells using fluorescent FIT-PNA
Susann Kummer1, Andrea Knoll, Andreas Herrmann
1Max Planck Institute Chemistry, Gottingen, Germany.
Abstract:
Significant efforts have been devoted to the development of techniques allowing the investigation of viral mRNA progression during the replication cycle. We herein describe the use of sequence-specific FIT-PNA (Forced Intercalation Peptide Nucleic Acids) probes which contain a single intercalator serving as an artificial fluorescent nucleobase. FIT-PNA probes are not degraded by enzymes, neither by nucleases nor by proteases, and provide for both high sensitivity and high target specificity under physiological conditions inside the infected living host cell.
Insights
Researchers developed novel Forced Intercalation Peptide Nucleic Acid (FIT-PNA) probes for tracking viral mRNA. These probes offer high sensitivity and specificity within living host cells during viral replication.
Area of Science:
- Molecular Biology
- Virology
- Biochemistry
Background:
- Investigating viral mRNA progression is crucial for understanding viral replication cycles.
- Existing techniques face limitations in sensitivity and specificity within live cells.
Purpose of the Study:
- To introduce and evaluate Forced Intercalation Peptide Nucleic Acid (FIT-PNA) probes for studying viral mRNA.
- To demonstrate the utility of FIT-PNA probes for high-sensitivity, high-specificity detection of viral mRNA in vivo.
Main Methods:
- Development of sequence-specific FIT-PNA probes incorporating an artificial fluorescent nucleobase.
- Assessment of probe stability against enzymatic degradation (nucleases and proteases).
- Evaluation of probe performance under physiological conditions in infected host cells.
Main Results:
- FIT-PNA probes exhibit resistance to both nuclease and protease degradation.
- Probes demonstrate high sensitivity and target specificity for viral mRNA.
- Successful application of FIT-PNA probes for investigating viral mRNA progression in infected living host cells.
Conclusions:
- FIT-PNA probes represent a robust tool for real-time monitoring of viral mRNA.
- The developed probes overcome limitations of previous methods for studying viral replication.
- This technique enhances our ability to study viral dynamics within host cells.
