Label-Free Dynamic Mass Redistribution Reveals Low-Density, Prosurvival α1B-Adrenergic Receptors in Human SW480 Colon Carcinoma Cells.
J Pharmacol Exp Ther
; 361(2): 219-228, 2017 05.
Article
em En
| MEDLINE
| ID: mdl-28196836
ABSTRACT
Small molecules that target the adrenergic family of G protein-coupled receptors (GPCRs) show promising therapeutic efficacy for the treatment of various cancers. In this study, we report that human colon cancer cell line SW480 expresses low-density functional α1B-adrenergic receptors (ARs) as revealed by label-free dynamic mass redistribution (DMR) signaling technology and confirmed by quantitative reverse-transcriptase polymerase chain reaction analysis. Remarkably, although endogenous α1B-ARs are not detectable via either [3H]-prazosin-binding analysis or phosphoinositol hydrolysis assays, their activation leads to robust DMR and enhanced cell viability. We provide pharmacological evidence that stimulation of α1B-ARs enhances SW480 cell viability without affecting proliferation, whereas stimulating ß-ARs diminishes both viability and proliferation of SW480 cells. Our study illustrates the power of label-free DMR technology for identifying and characterizing low-density GPCRs in cells and suggests that drugs targeting both α1B- and ß-ARs may represent valuable small-molecule therapeutics for the treatment of colon cancer.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Carcinoma
/
Receptores Adrenérgicos alfa 1
/
Neoplasias do Colo
/
Antagonistas de Receptores Adrenérgicos alfa 1
Limite:
Humans
Idioma:
En
Revista:
J Pharmacol Exp Ther
Ano de publicação:
2017
Tipo de documento:
Article