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2017 ; 14
(4
): 253-266
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Proteomic Analysis of Normal and Cancer Cervical Cell Lines Reveals Deregulation
of Cytoskeleton-associated Proteins
#MMPMID28647699
Pappa KI
; Lygirou V
; Kontostathi G
; Zoidakis J
; Makridakis M
; Vougas K
; Daskalakis G
; Polyzos A
; Anagnou NP
Cancer Genomics Proteomics
2017[Jul]; 14
(4
): 253-266
PMID28647699
show ga
BACKGROUND: Both HPV-positive and -negative cervical cancers are primarily
associated with features of cell cycle and cytoskeletal disruption; however, the
actual biological processes affected remain elusive. To this end, we
systematically characterized the intracellular proteomic profiles of four
distinct and informative cervical cell lines. MATERIALS AND METHODS: Cell
extracts from a normal cervical (HCK1T) and three cervical cancer cell lines, one
HPV-negative (C33A), and two HPV-positive, SiHa (HPV16+) and HeLa (HPV18+), were
analyzed by 2-dimensional electrophoresis and differentially expressed proteins
were identified by MALDI-TOF mass spectrometry, while differential expression was
confirmed by western blot analysis. RESULTS: In total, 113 proteins were found
differentially expressed between the normal and the cervical cancer lines.
Bioinformatics analysis revealed the actin cytoskeleton signaling pathway to be
significantly affected, while up-regulation of cofilin-1, an actin depolymerizing
factor, was documented and further validated by western blotting. Furthermore,
two-way comparisons among the four cell lines, revealed a set of 18 informative
differentially expressed proteins. CONCLUSION: These novel identified proteins
provide the impetus for further functional studies to dissect the mechanisms
operating in the two distinct pathways of cervical carcinogenesis.