KSHV targets multiple leukocyte lineages during long-term productive infection in NOD/SCID mice
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Summary
This summary is machine-generated.Researchers developed a novel animal model for Kaposi sarcoma-associated herpesvirus (KSHV) infection. This model tracks viral gene expression, cell tropism, and immune responses in mice, offering new insights into KSHV pathogenesis.
Area Of Science
- Virology
- Immunology
- Animal Models
Background
- Kaposi sarcoma-associated herpesvirus (KSHV) is a human oncogenic herpesvirus.
- Existing animal models have limitations in studying KSHV pathogenesis and immune responses.
- A robust model is needed to investigate viral gene expression, cell tropism, and host immunity longitudinally.
Purpose Of The Study
- To develop and characterize a new mouse model for KSHV infection.
- To evaluate viral gene expression patterns, cell tropism, and immune responses in vivo.
- To assess the potential for generating human KSHV-specific immune responses in a chimeric host.
Main Methods
- NOD/SCID mice were intravenously injected with purified KSHV.
- Latent and lytic viral transcripts were measured in organs over 4 months.
- Flow cytometry and immunofluorescence microscopy were used to identify infected cell types.
- NOD/SCID mice were engrafted with human hematopoietic tissue (NOD/SCID-hu mice) to study human immune responses.
- Ganciclovir treatment was administered to assess its effect on viral replication.
Main Results
- Sequential escalation of latent and then lytic KSHV gene expression was observed.
- Virion production was detected in the murine spleen via electron microscopy.
- KSHV infected murine B cells, macrophages, NK cells, and dendritic cells.
- NOD/SCID-hu mice produced human KSHV-specific antibodies.
- Ganciclovir suppressed KSHV DNA and RNA levels, indicating reversible suppression of lytic replication and establishment of latent infection.
Conclusions
- A novel NOD/SCID mouse model effectively recapitulates KSHV infection dynamics.
- The model allows for detailed study of KSHV cell tropism and viral gene expression.
- The NOD/SCID-hu model demonstrates potential for investigating human KSHV-specific immunity.
- KSHV establishes latent infection in vivo, even with ongoing suppression of lytic replication.