Assessment of the TRPM8 inhibitor AMTB in breast cancer cells and its identification as an inhibitor of voltage gated sodium channels.
Life Sci
; 198: 128-135, 2018 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-29496495
ABSTRACT
AIMS:
To assess levels of the calcium permeable transient receptor potential cation channel, subfamily melastatin, member 8 (TRPM8) in breast cancer molecular subtypes and to assess the consequences of TRPM8 pharmacological inhibition with AMTB (an inhibitor of TRPM8) on breast cancer cell lines. MATERIALS ANDMETHODS:
Cell viability and migration of breast cancer cells was determined using MTS assays and wound healing assays, respectively. RNA-Seq analysis of breast tumours and qPCR in breast cancer cell lines were used to assess mRNA levels of ion channels. Membrane potential assays were employed to assess the effects of AMTB against specific voltage gated sodium channels (NaV). KEYFINDINGS:
TRPM8 levels were significantly higher in breast cancers of the basal molecular subtype. AMTB decreased viable cell number in MDA-MB-231 and SK-BR-3 breast cancer cell lines (30 and 100⯵M), and also reduced the migration of MDA-MB-231 cells (30⯵M). However, these effects were independent of TRPM8, as no TRPM8 mRNA was detected in MDA-MB-231 cells. AMTB was identified as an inhibitor of NaV isoforms. NaV1.1-1.9 were expressed in a number of breast cancer cell lines, with NaV1.5 mRNA highest in MDA-MB-231 cells compared to the other breast cancer cell lines assessed.SIGNIFICANCE:
TRPM8 levels may be elevated in basal breast cancers, however, TRPM8 expression appears to be lost in many breast cancer cell lines. Some of the effects of AMTB attributed to TRPM8 may be due to effects on NaV channels.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tiofenos
/
Benzamidas
/
Neoplasias da Mama
/
Canais de Cátion TRPM
/
Canais de Sódio Disparados por Voltagem
/
Bloqueadores do Canal de Sódio Disparado por Voltagem
/
Antineoplásicos
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Female
/
Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article