Low expression levels of putative HPV encoded microRNAs in cervical samples

Show full item record



Permalink

http://hdl.handle.net/10138/174955

Citation

Virtanen , E , Pietila , T , Nieminen , P , Qian , K & Auvinen , E 2016 , ' Low expression levels of putative HPV encoded microRNAs in cervical samples ' , SpringerPlus , vol. 5 , 1856 . https://doi.org/10.1186/s40064-016-3524-3

Title: Low expression levels of putative HPV encoded microRNAs in cervical samples
Author: Virtanen, Elina; Pietila, Tuuli; Nieminen, Pekka; Qian, Kui; Auvinen, Eeva
Contributor: University of Helsinki, Institute of Biotechnology
University of Helsinki, Clinicum
University of Helsinki, Institute of Biotechnology
University of Helsinki, Eeva Auvinen / Principal Investigator
Date: 2016-10-22
Language: eng
Number of pages: 8
Belongs to series: SpringerPlus
ISSN: 2193-1801
URI: http://hdl.handle.net/10138/174955
Abstract: Using small RNA sequencing of libraries established from cervical samples and cervical cancer cell lines, we have previously reported identification of nine and validation of five putative microRNA species encoded by human papillomaviruses (HPV) including five microRNAs encoded by HPV 16. Here we have studied the expression of HPV 16 encoded microRNAs in cervical samples and in HPV 16 containing cell lines. Different sample matrices were collected for the study: 20 paraffin embedded cervical tissue samples, 16 liquid cytology samples, and 16 cervical cell samples from women attending colposcopy due to cervical abnormalities, as well as four HPV 16 containing cell lines. Total RNA was extracted, the samples were spiked with small synthetic control RNAs, and the expression of five HPV 16 encoded microRNAs was assessed by real-time PCR amplification. HPV encoded microRNAs could be frequently detected, albeit at high cycle counts. HPV16-miR-H1 was detected in 3.6 %, HPV16-miR-H3 in 23.6 %, HPV16-miR-H5 in 7.3 %, and HPV16-miR-H6 in 18.2 % of all valid samples. True positive signals for HPV16-miR-H2 could not be detected in any of the samples. Viral microRNAs were detected most frequently in paraffin-embedded samples: in one sample representing normal squamous epithelium, in one cervical intraepithelial neoplasia (CIN) grade 1, one CIN2, three CIN3, two squamous cell carcinoma, three adenocarcinoma in situ, and two adenocarcinoma samples. One liquid cytology sample from a patient with CIN3 as well as all four cell lines were positive for HPV16-miR-H3. In all cases HPV encoded microRNAs were expressed at low levels.
Subject: HUMAN PAPILLOMAVIRUSES
MIRNA
VALIDATION
TARGETS
DNA
3111 Biomedicine
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
s40064_016_3524_3.pdf 679.3Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record