The relative and analytical sensitivity of the APTIMA HPV test (AHPV, broad-spectrum, target amplification) and the PreTect HPV-Proofer (type-specific, target amplification) for the detection of HPV mRNA in various cell lines was compared. Equivalent relative sensitivity for the HPV 16-containing cell lines (2.5 cells/ml with both CaSki and SiHa) was observed for the mRNA assays--and similar sensitivities were observed for the detection of HPV 18 (HeLa) and 45 (MS751); ranging from 2.5 cells/ml (Proofer) to 25 cells/ml (APTIMA). In relation to analytical sensitivity, again, the mRNA assays showed similar sensitivities to each other, ranging from 0.1 to 1 cell per reaction for APTIMA and 0.1 to 10 cells per reaction for PreTect HPV-Proofer (depending on cell line). Both mRNA assays consistently achieved a higher analytical sensitivity than a DNA based comparator--the Hybrid Capture 2 High-Risk HPV DNA test (hc2). This study indicates that mRNA tests had high analytical sensitivity, higher than a well established DNA-test based when using cell lines as target. Implications for clinical application are discussed.
Keywords: APTIMA; HPV; PreTect HPV-Proofer; Sensitivity; hc2.
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