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Erschienen in: Cancer Immunology, Immunotherapy 12/2009

01.12.2009 | Original Article

Local expression of interferon-alpha and interferon receptors in cervical intraepithelial neoplasia

verfasst von: Nelson R. Tirone, Bethanea C. Peghini, Ana Cristina M. Barcelos, Eddie F. C. Murta, Marcia A. Michelin

Erschienen in: Cancer Immunology, Immunotherapy | Ausgabe 12/2009

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Abstract

Purpose

The present study evaluated mRNA expression of interferon-alpha (IFN-α), IFN-α receptor subunits (IFNAR-1 and IFNAR-2) and an IFN-stimulated gene encoding the enzyme 2′,5′-oligoadenylate synthetase (2′5′OAS) in biopsies on patients with varying grades of cervical intraepithelial neoplasia (CIN I, II and III).

Methods

Uterine cervix biopsies were collected from women with CIN I, II and III (n = 28) and controls without CIN lesions or human papilloma virus (HPV) infection (n = 17). The presence of high and low-risk HPV DNA was determined using hybrid capture. The mRNA levels of IFNAR-1, IFNAR-2, IFN-α and 2′5′OAS were determined by RT-PCR with specific primers.

Results

The control group exhibited a greater frequency of IFNAR-1 expression (10/17; 58.3%) than the CIN samples (4/28; 14.2%) (P = 0.0018), while, the expression of IFNAR-2 was also greater in the control samples (11/17; 64.7%) than in the patients with lesions (2/28; 7.1%) (P = 0.0018). Importantly, simultaneous expression of both receptors was observed only in the control group (8/17; 47.0%) (P = 0.0001). Among the CIN samples, there was one case of low expression of mRNA of IFNAR-1 and IFNAR-2. IFN-α was present in 14.2% (4/28) of the CIN samples but was not expressed in the control group. mRNA 2′5′OAS were expressed in 28.5% (8/28) of the CIN samples and 11.7% (2/17) of the control samples (not statistically significant). Fifty percent (14/28) of the CIN samples were positive for HPV DNA.

Conclusions

Cervical biopsy samples from control women or those without neoplasia or HPV infection displayed higher IFN-α receptor expression than those with CIN, while simultaneous expression of both IFN-α receptor subunits was found only in the control group. There was no significant difference in mRNA expression of IFN-α and 2′5′OAS between the control and CIN groups. Then we concluded that the samples obtained from patients with CIN present low levels of the IFN-α receptor mRNA.
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Metadaten
Titel
Local expression of interferon-alpha and interferon receptors in cervical intraepithelial neoplasia
verfasst von
Nelson R. Tirone
Bethanea C. Peghini
Ana Cristina M. Barcelos
Eddie F. C. Murta
Marcia A. Michelin
Publikationsdatum
01.12.2009
Verlag
Springer-Verlag
Erschienen in
Cancer Immunology, Immunotherapy / Ausgabe 12/2009
Print ISSN: 0340-7004
Elektronische ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-009-0707-6

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