Abstract:
:Cancer cells acquire unique secretome compositions that contribute to tumor development and metastasis. The aim of our study was to elucidate the biological processes involved in cervical cancer, by performing a proteomic analysis of the secretome from the following informative cervical cell lines: SiHa (HPV16+), HeLa (HPV18+), C33A (HPV-), and HCK1T (normal). Proteins were analyzed by 2D gel electrophoresis coupled to MALDI-TOF-MS. Enrichment of secreted proteins with characteristic profiles for each cell line was followed by the identification of differentially expressed proteins. Particularly, transforming growth factor-beta-induced protein ig-h3 (Beta ig-h3) and peroxiredoxin-2 (PRDX2) overexpression in the secretome of cancer cell lines was detected and confirmed by Western blot. Bioinformatics analysis identified the transcription factor NRF2 as a regulator of differentially expressed proteins in the cervical cancer secretome. NRF2 levels were measured by both Western blot and Multiple Reaction Monitoring (MRM) in the total cell extract of the four cell lines. NRF2 was upregulated in SiHa and C33A compared to HCK1T. In conclusion, the secreted proteins identified in cervical cancer cell lines indicate that aberrant NRF2-mediated oxidative stress response (OSR) is a prominent feature of cervical carcinogenesis.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Kontostathi G,Zoidakis J,Makridakis M,Lygirou V,Mermelekas G,Papadopoulos T,Vougas K,Vlamis-Gardikas A,Drakakis P,Loutradis D,Vlahou A,Anagnou NP,Pappa KIdoi
10.1155/2017/4180703subject
Has Abstractpub_date
2017-01-01 00:00:00pages
4180703eissn
2314-6133issn
2314-6141journal_volume
2017pub_type
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