Voltage gated sodium channels in cancer and their potential mechanisms of action

Area of Science:

• Molecular Biology
• Cell Biology
• Oncology

Background:

• Voltage-gated sodium channels (VGSC) are increasingly recognized for their involvement in cancer cell invasion and metastasis.
• The precise mechanisms by which VGSC contribute to cancer progression remain largely undefined.
• Understanding VGSC's roles beyond action potential propagation is crucial for cancer research.

Purpose of the Study:

• To review lesser-known functions of VGSC outside of their traditional role in action potential propagation.
• To synthesize the current understanding of VGSC effects specifically within the context of cancer.
• To explore potential downstream signaling pathways activated by VGSC in cancer cells.

Main Methods:

• Comprehensive literature review of existing research on VGSC and cancer.
• Analysis of studies investigating VGSC functions in cellular processes.
• Discussion of potential molecular mechanisms linking VGSC activity to cancer invasiveness.

Main Results:

• VGSC are strongly implicated in the function of invadopodia, critical structures at the leading edge of metastatic cancer cells.
• Sodium gradients, potentially modulated by VGSC, are hypothesized to drive key processes within invadopodia.
• VGSC activity can influence the function of sodium-hydrogen exchangers (NHE) and sodium-calcium exchangers (NCX), as well as voltage-gated calcium channels.

Conclusions:

• The most probable role of VGSC in cancer metastasis involves their function within invadopodia.
• Alterations in hydrogen ion or calcium handling due to VGSC activity provide a plausible explanation for increased cancer cell invasiveness.
• Further research into VGSC's non-canonical functions is warranted to elucidate their full impact on cancer progression.