Background: A subset of human hepatocellular carcinomas (HCC) exhibit mutations of beta-catenin gene CTNNB1 and overexpress Glutamine synthetase (GS). The CTNNB1-mutated HCC cell line HepG2 is sensitive to glutamine starvation induced in vitro with the antileukemic drug Crisantaspase and the GS inhibitor methionine-L-sulfoximine (MSO). Methods: Immunodeficient mice with subcutaneous xenografts of the CTNNB1-mutated HCC cell lines HepG2 and HC-AFW1 were treated with Crisantaspase and/or MSO, and tumour growth was monitored. At the end of treatment, tumour weight and histology were assessed. Serum and tissue amino acids were determined by HPLC. Gene and protein expression were estimated with RT-PCR and western blot and GS activity with a colorimetric method. mTOR activity was evaluated from the phosphorylation of p70S6K1. Results: Crisantaspase and MSO depleted serum glutamine, lowered glutamine in liver and tumour tissue, and inhibited liver GS activity. HepG2 tumour growth was significantly reduced by either Crisantaspase or MSO, and completely suppressed by the combined treatment. The combined treatment was also effective against xenografts of the HC-AFW1 cell line, which is Crisantaspase resistant in vitro. Conclusions: The combination of Crisantaspase and MSO reduces glutamine supply to CTNNB1-mutated HCC xenografts and hinders their growth.

Glutamine depletion by crisantaspase hinders the growth of human hepatocellular carcinoma xenografts / Chiu, M; Tardito, S.; Pillozzi, S.; Arcangeli, A.; Armento, A.; Uggeri, J.; Missale, G.; Bianchi, M.G.; Barilli, A.; Dall'Asta, V.; Campanini, N.; Silini, E.M.; Fuchs, J.; Armeanu-Ebinger, S.; Bussolati, O.. - In: BRITISH JOURNAL OF CANCER. - ISSN 1532-1827. - ELETTRONICO. - 111:(2014), pp. 1159-1167. [10.1038/bjc.2014.425]

Glutamine depletion by crisantaspase hinders the growth of human hepatocellular carcinoma xenografts

CHIU, MARTINA;PILLOZZI, SERENA;ARCANGELI, ANNAROSA;
2014

Abstract

Background: A subset of human hepatocellular carcinomas (HCC) exhibit mutations of beta-catenin gene CTNNB1 and overexpress Glutamine synthetase (GS). The CTNNB1-mutated HCC cell line HepG2 is sensitive to glutamine starvation induced in vitro with the antileukemic drug Crisantaspase and the GS inhibitor methionine-L-sulfoximine (MSO). Methods: Immunodeficient mice with subcutaneous xenografts of the CTNNB1-mutated HCC cell lines HepG2 and HC-AFW1 were treated with Crisantaspase and/or MSO, and tumour growth was monitored. At the end of treatment, tumour weight and histology were assessed. Serum and tissue amino acids were determined by HPLC. Gene and protein expression were estimated with RT-PCR and western blot and GS activity with a colorimetric method. mTOR activity was evaluated from the phosphorylation of p70S6K1. Results: Crisantaspase and MSO depleted serum glutamine, lowered glutamine in liver and tumour tissue, and inhibited liver GS activity. HepG2 tumour growth was significantly reduced by either Crisantaspase or MSO, and completely suppressed by the combined treatment. The combined treatment was also effective against xenografts of the HC-AFW1 cell line, which is Crisantaspase resistant in vitro. Conclusions: The combination of Crisantaspase and MSO reduces glutamine supply to CTNNB1-mutated HCC xenografts and hinders their growth.
2014
111
1159
1167
Chiu, M; Tardito, S.; Pillozzi, S.; Arcangeli, A.; Armento, A.; Uggeri, J.; Missale, G.; Bianchi, M.G.; Barilli, A.; Dall'Asta, V.; Campanini, N.; Sil...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1022670
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 53
  • ???jsp.display-item.citation.isi??? 51
social impact