Metformin enhances anti-tumor effect of L-type amino acid transporter 1 (LAT1) inhibitor.
J Pharmacol Sci
; 131(2): 110-7, 2016 Jun.
Article
em En
| MEDLINE
| ID: mdl-27262901
ABSTRACT
BACKGROUND:
In many cancer cells, L-type amino acid transporter 1 (LAT1) transports neutral amino acids with bulky side chain, which activate mammalian target of rapamycin (mTOR) to cause cell proliferation. An anti-diabetic drug, metformin, has been shown to activate AMP-activated protein kinase (AMPK), which leads to inhibition of mTOR. LAT1 inhibition in combination with metformin could result in more prominent suppression of mTOR activity.PURPOSE:
Anti-proliferative effect of a newly developed LAT1 specific inhibitor JPH203 in combination with metformin is evaluated in 2 head and neck cancer cell lines, Ca9-22 and HEp-2 cells and in nude mice inoculated with Ca9-22 cells. RESULTS ANDDISCUSSION:
By MTT assay, 0.5 mM metformin inhibited proliferation of Ca9-22 cells to 70% of control. In the presence of 100 µM JPH203, proliferation of Ca9-22 cells was inhibited to 60% of control. By combining these 2 drugs, proliferation of Ca9-22 was significantly inhibited to 40% of control. However, this regimen was not very effective against HEp-2 cells. This combination also suppressed in vivo growth of Ca9-22 cells in a xenotransplant model. A combination of anti-LAT1 drug with metformin may be an effective anti-proliferative therapy for certain subsets of cancers.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Tirosina
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Benzoxazóis
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Transportador 1 de Aminoácidos Neutros Grandes
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Metformina
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Antineoplásicos
Limite:
Animals
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Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article