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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2016 ; 291
(25
): 13194-205
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Deletion of Amino Acid Transporter ASCT2 (SLC1A5) Reveals an Essential Role for
Transporters SNAT1 (SLC38A1) and SNAT2 (SLC38A2) to Sustain Glutaminolysis in
Cancer Cells
#MMPMID27129276
Bröer A
; Rahimi F
; Bröer S
J Biol Chem
2016[Jun]; 291
(25
): 13194-205
PMID27129276
show ga
Many cancer cells depend on glutamine as they use the glutaminolysis pathway to
generate building blocks and energy for anabolic purposes. As a result, glutamine
transporters are essential for cancer growth and are potential targets for cancer
chemotherapy with ASCT2 (SLC1A5) being investigated most intensively. Here we
show that HeLa epithelial cervical cancer cells and 143B osteosarcoma cells
express a set of glutamine transporters including SNAT1 (SLC38A1), SNAT2
(SLC38A2), SNAT4 (SLC38A4), LAT1 (SLC7A5), and ASCT2 (SLC1A5). Net glutamine
uptake did not depend on ASCT2 but required expression of SNAT1 and SNAT2.
Deletion of ASCT2 did not reduce cell growth but caused an amino acid starvation
response and up-regulation of SNAT1 to replace ASCT2 functionally. Silencing of
GCN2 in the ASCT2(-/-) background reduced cell growth, showing that a combined
targeted approach would inhibit growth of glutamine-dependent cancer cells.