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Updated: Dec 30, 2025
06:21
Quantitative Fluorescence In Situ Hybridization FISH and Immunofluorescence IF of Specific Gene Products in KSHV-Infected Cells
Published on: August 27, 2019
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Rainbow Kaposi's Sarcoma-Associated Herpesvirus Revealed Heterogenic Replication with Dynamic Gene Expression
Ken-Ichi Nakajima1, Sara Guevara-Plunkett1, Frank Chuang2
1Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA.
Journal of Virology
|January 24, 2020
Summary
Researchers developed Rainbow-KSHV, a novel tool to track Kaposi's sarcoma-associated herpesvirus (KSHV) reactivation at the single-cell level. This allows detailed study of KSHV gene regulation heterogeneity and improved understanding of viral replication dynamics.
Area of Science:
- Virology
- Molecular Biology
- Cellular Biology
Background:
- Kaposi's sarcoma-associated herpesvirus (KSHV) reactivation studies often use population averages, masking individual cell responses.
- Understanding KSHV gene regulation heterogeneity is crucial for developing targeted therapies.
Purpose of the Study:
- To develop a novel reporter virus for analyzing KSHV reactivation at the single-cell level.
- To investigate the heterogeneity of KSHV replication and gene expression kinetics in individual cells.
Main Methods:
- Generation of a recombinant KSHV (Rainbow-KSHV) encoding three fluorescently tagged KSHV proteins.
- Live imaging and cell fractionation to monitor viral replication and gene expression.
- Isolation of fluorescence-positive cells to enhance downstream experimental sensitivity.
Main Results:
- Rainbow-KSHV demonstrated similar replication kinetics to wild-type KSHV.
- Live imaging revealed unsynchronized and heterogeneous initiation and kinetics of KSHV reactivation and replication.
- Temporal gene regulation was observed, with early lytic gene expression ceasing in late protein-expressing cells.
- Isolation of fluorescent cells improved experimental dynamic ranges by 10-fold.
Conclusions:
- Rainbow-KSHV is a valuable tool for dissecting heterogeneous KSHV reactivation responses.
- Single-cell analysis provides deeper insights into KSHV replication dynamics and gene regulation.
- This approach enables more precise sample selection for advanced molecular analyses.
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