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Ref Type Journal Article
PMID (27262901)
Authors Ueno S, Kimura T, Yamaga T, Kawada A, Ochiai T, Endou H, Sakurai H
Title Metformin enhances anti-tumor effect of L-type amino acid transporter 1 (LAT1) inhibitor.
Journal Journal of pharmacological sciences
Vol 131
Issue 2
Date 2016 Jun
URL
Abstract Text 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.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.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.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Unknown unknown head and neck squamous cell carcinoma not applicable JPH203 + Metformin Preclinical - Cell line xenograft Actionable In a preclinical study, the combination of JPH203 (KYT-0353) and Glucophage (metformin) decreased proliferation of head and neck squamous cell cancer cell lines in culture, and reduced tumor growth in a head and neck squamous cell cancer cell line xenograft model (PMID: 27262901). 27262901