Abstract：
:Voltage-gated sodium (NaV) channels have been related with cell migration and invasiveness in human cancers. We previously reported the contribution of NaV1.6 channels activity with the invasion capacity of cervical cancer (CeCa) positive to Human Papilloma Virus type 16 (HPV16), which accounts for 50% of all CeCa cases. Here, we show that NaV1.6 gene (SCN8A) overexpression is a general characteristic of CeCa, regardless of the HPV type. In contrast, no differences were observed in NaV1.6 channel expression between samples of non-cancerous and cervical intraepithelial neoplasia. Additionally, we found that CeCa cell lines, C33A, SiHa, CaSki and HeLa, express mainly the splice variant of SCN8A that lacks exon 18, shown to encode for an intracellularly localized NaV1.6 channel, whereas the full-length adult form was present in CeCa biopsies. Correlatively, patch-clamp experiments showed no evidence of whole-cell sodium currents (INa) in CeCa cell lines. Heterologous expression of full-length NaV1.6 isoform in C33A cells produced INa, which were sufficient to significantly increase invasion capacity and matrix metalloproteinase type 2 (MMP-2) activity. These data suggest that upregulation of NaV1.6 channel expression occurs when cervical epithelium have been transformed into cancer cells, and that NaV1.6-mediated invasiveness of CeCa cells involves MMP-2 activity. Thus, our findings support the notion about using NaV channels as therapeutic targets against cancer metastasis.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lopez-Charcas O,Espinosa AM,Alfaro A,Herrera-Carrillo Z,Ramirez-Cordero BE,Cortes-Reynosa P,Perez Salazar E,Berumen J,Gomora JCdoi
10.1038/s41598-018-31364-ysubject
Has Abstractpub_date
2018-08-29 00:00:00pages
12995issue
1issn
2045-2322pii
10.1038/s41598-018-31364-yjournal_volume
8pub_type
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