Abstract
Kaposi's sarcoma-associated herpesvirus is a novel herpesvirus linked to AIDS-related neoplasms. Currently it is difficult to evaluate the number of virions in viral preparation or in samples obtained from patients with Kaposi's sarcoma (KS) , since no protocol for determining the plaque forming units of KSHV exists. We constructed a fragment of a different size than the target viral DNA to carry out a competitive-quantitative PCR. Both fragment and viral DNA were added to a single PCR reaction to compete for the same set of primers. By knowing the amount of the competitor added to the reaction, we could determine the number of viral DNA molecules. We used this assay successfully to detect and quantify KSHV genomes from KS skin biopsies and pleural effusion lymphoma, and from different viral preparations. To date, this is the most convenient and economic method that allows an accurate and fast viral detection/quantitation with a single PCR.
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