Improved detection of viral RNA isolated from liquid-based cytology samples.
MOLECULAR DIAGNOSIS : A JOURNAL DEVOTED TO THE UNDERSTANDING OF HUMAN DISEASE THROUGH THE CLINICAL APPLICATION OF MOLECULAR BIOLOGY 2001;
6:125-30. [PMID:
11468697 DOI:
10.1054/modi.2001.25320]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND
Molecular diagnosis requires the ability to obtain high-quality nucleic acids that are representative of the disease state. We evaluated the recovery and detection of limiting amounts of viral oncogenic RNA from cells fixed in liquid-based cytology media.
METHODS AND RESULTS
Serial dilutions of a human papillomavirus (HPV)-positive cell line fixed in a liquid media was used as a model system. Total nucleic acid (TNA) extraction produced RNA with clearly visible ribosomal bands even after one year of storage. These TNA extracts, treated with DNase-I, were used in an RT-PCR assay for HPV-16 E6-E7 oncogenic transcripts. With chemiluminscent Southern blot detection, samples with one HPV-positive cell in 30,000 were consistently detected.
CONCLUSION
PreservCyt-fixed cells can yield RNA suitable for molecular assays even after one year of storage.
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