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Establishment and Quantification of De Novo Lytic Infection by Cell-free Kaposi's Sarcoma-Associated Herpesvirus
Published on: August 15, 2025
Kaposi's sarcoma-associated herpesvirus: the role of lytic replication in targeted therapy
Graciela Andrei1, Robert Snoeck
1Laboratory of Virology, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Leuven, Belgium.
Purpose Of Review:
To discuss the role of Kaposi's sarcoma-associated herpesvirus (KSHV) lytic replication in viral-associated diseases and assess the progress on targeting KSHV lytic replication as a strategy to prevent KSHV-related malignancies.
Recent Findings:
New inhibitors of viral lytic replication are being developed as well as novel modalities are being investigated to target cellular processes that the virus hijacks during its life cycle. Research has also focused on reactivating viral lytic replication in latently infected tumour cells (lytic induction therapy) to promote death of tumour cells.
Summary:
KSHV is linked to three malignancies: Kaposi sarcoma, primary effusion lymphoma, and multicentric Castleman disease. Despite significant progress in understanding KSHV pathobiology, no therapeutic guidelines for the management of KSHV-related diseases exist, and current treatments are suboptimal and associated with toxicity. Antiherpesvirus drugs have shown inconsistent results in KSHV-associated malignancies that harbour the virus in a latent state. However, lytic replication plays a crucial role in the process of tumorigenesis. Therefore, not only antiviral agents directed against the virus replicative cycle but also agents that target cellular processes that are activated by the virus are being investigated. Antivirals may also be used in combination with inducers of the viral lytic stage.
Insights
Targeting Kaposi's sarcoma-associated herpesvirus (KSHV) lytic replication is crucial for preventing KSHV-related cancers. New therapies aim to inhibit viral replication or induce lytic replication for tumor cell death.
Area of Science:
- Virology
- Oncology
- Infectious Diseases
Background:
- Kaposi's sarcoma-associated herpesvirus (KSHV) is linked to Kaposi sarcoma, primary effusion lymphoma, and multicentric Castleman disease.
- Current treatments for KSHV-associated malignancies are suboptimal and toxic, with no established therapeutic guidelines.
- Antiherpesvirus drugs show inconsistent efficacy against KSHV in its latent state.
Purpose of the Study:
- To review the role of KSHV lytic replication in disease pathogenesis.
- To assess advancements in targeting KSHV lytic replication for preventing KSHV-related malignancies.
Main Methods:
- Review of current research on KSHV pathobiology and therapeutic strategies.
- Investigation of novel antiviral agents and cellular process targets.
- Exploration of lytic induction therapy for tumor cell death.
Main Results:
- New inhibitors of KSHV lytic replication are under development.
- Novel therapeutic modalities targeting virus-hijacked cellular processes are being explored.
- Lytic induction therapy aims to promote tumor cell death by reactivating latent KSHV.
Conclusions:
- KSHV lytic replication is critical in KSHV-associated tumorigenesis.
- Targeting viral replication and cellular processes is a promising strategy.
- Combination therapies, including antivirals and lytic inducers, are being investigated.
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