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Journal of Clinical Microbiology, November 1998, p. 3164-3169, Vol. 36, No. 11
Section Molecular Pathology,
Received 20 April 1998/Returned for modification 24 June
1998/Accepted 18 August 1998
Nucleic acid sequence-based amplification (NASBA) assays were
developed for direct detection of Epstein-Barr virus (EBV) transcripts encoding EBV nuclear antigen 1 (EBNA1), latent membrane proteins (LMP)
1 and 2, and BamHIA rightward frame 1 (BARF1) and for the noncoding EBV early RNA 1 (EBER1). The sensitivities of all NASBAs were
at least 100 copies of specific in vitro-generated RNA. Furthermore, 1 EBV-positive JY cell in a background of 50,000 EBV-negative Ramos cells
(the relative sensitivity) was detected by using the EBNA1, LMP1, and
LMP2 NASBA assays. The relative sensitivity of the EBER1 NASBA was 100 EBV-positive cells, which was probably related to the loss of small RNA
molecules during the isolation. The BARF1 and LMP2 NASBAs were
evaluated on clinical material. BARF1 expression was found in 6 of 7 nasopharyngeal carcinomas (NPC) but in 0 of 22 Hodgkin's disease (HD)
cases, whereas LMP2 expression was found in 7 of 7 NPCs and in 17 of 22 HD cases. For detection of EBNA1 transcripts in HLs (n = 12) and T- and B-cell non-Hodgkin's lymphomas (n = 3 and n = 2, respectively), NASBA was compared with
reverse transcriptase (RT) PCR. Two samples were positive only with
NASBA, and two other samples were positive only with RT-PCR; for all
other samples, the RT-PCR and NASBA results were in agreement. We
conclude that NASBA is suitable for sensitive and specific detection of
the above-mentioned EBV transcripts, regardless of their splicing
patterns and the presence of EBV DNA. The EBNA1, LMP2, and BARF1 NASBAs
developed in this study proved to be reliable assays for detection of
the corresponding transcripts in EBV-positive clinical material.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Nucleic Acid Sequence-Based Amplification, a New Method for
Analysis of Spliced and Unspliced Epstein-Barr Virus Latent
Transcripts, and Its Comparison with Reverse Transcriptase
PCR
*
Corresponding author. Mailing address: Section
Molecular Pathology, Department of Pathology, University Hospital Vrije
Universiteit, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands. Phone:
31-20-4440503/44017. Fax: 31-20-4442964. E-mail:
vandenbrule{at}azvu.nl.
Journal of Clinical Microbiology, November 1998, p. 3164-3169, Vol. 36, No. 11
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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