HHV8 a subtype is associated with rapidly evolving classic Kaposi's sarcoma.

Area of Science:

• Oncology
• Virology
• Immunology

Background:

• The link between human herpesvirus 8 (KSHV) and Kaposi's sarcoma (KS) is established, yet risk factors, transmission, and genotype-specific pathogenicity require further investigation.
• Understanding these factors is crucial for managing classic KS (cKS).

Purpose of the Study:

• To analyze associations between clinical parameters, antibody levels, viral load, and KSHV genotypes in cKS patients.
• To determine if KSHV markers can predict disease progression and inform therapeutic strategies.

Main Methods:

• Quantitative real-time PCR, an in-house IFA assay, and ORF K1-VR1 sequence analysis were performed on blood, serum, and saliva samples from 38 cKS subjects.
• Analysis focused on correlating clinical stage with KSHV antibody levels, viral load, and genotype.

Main Results:

• KSHV lytic antibodies increased significantly in stage IV compared to stages I and II.
• Higher lytic antibodies and viral loads were observed in fast-progressing cKS patients, with KSHV type A predominantly found in rapid progressors.
• KSHV type A infection was associated with higher blood viral loads and more rapid disease progression.

Conclusions:

• KSHV lytic antibody levels and viral load can effectively monitor cKS clinical evolution.
• KSHV subtype A infection is linked to more rapid disease progression, suggesting a need for careful monitoring and aggressive treatment in affected patients.