Informace o publikaci

Tyrosine phosphatases regulate resistance to ALK inhibitors in ALK(+) anaplastic large cell lymphoma

Autoři	ATABAY Elif Karaca MECCA Carmen WANG Qi AMBROGIO Chiara MOTA Ines PROKOPH Nina MURA Giulia MARTINENGO Cinzia PATRUCCO Enrico LEONARDI Giulia HOSSA Jessica PICH Achille MOLOGNI Luca GAMBACORTI-PASSERINI Carlo BRUGIERES Laurence GEOERGER Birgit TURNER Suzanne Dawn VOENA Claudia CHEONG Taek-Chin CHIARLE Roberto
Rok publikování	2022
Druh	Článek v odborném periodiku
Časopis / Zdroj	Blood
Fakulta / Pracoviště MU	Středoevropský technologický institut
Citace
www	https://ashpublications.org/blood/article-abstract/139/5/717/477348/Tyrosine-phosphatases-regulate-resistance-to-ALK?redirectedFrom=fulltext
Doi	http://dx.doi.org/10.1182/blood.2020008136
Klíčová slova	NPM-ALKSTAT3 ACTIVATIONLUNG-CANCERPROTEINKINASERECEPTORGROWTHIDENTIFICATIONSHP21B
Popis	Anaplastic large cell lymphomas (ALCLs) frequently carry oncogenic fusions involving the anaplastic lymphoma kinase (ALK) gene. Targeting ALK using tyrosine kinase inhibitors (TKIs) is a therapeutic option in cases relapsed after chemotherapy, but TKI resistance may develop. By applying genomic loss-of-function screens, we identified PTPN1 and PTPN2 phosphatases as consistent top hits driving resistance to ALK TKIs in ALK(+) ALCL. Loss of either PTPN1 or PTPN2 induced resistance to ALK TKIs in vitro and in vivo. Mechanistically, we demonstrated that PTPN1 and PTPN2 are phosphatases that bind to and regulate ALK phosphorylation and activity. In turn, oncogenic ALK and STAT3 repress PTPN1 transcription. We found that PTPN1 is also a phosphatase for SHP2, a key mediator of oncogenic ALK signaling. Downstream signaling analysis showed that deletion of PTPN1 or PTPN2 induces resistance to crizotinib by hyperactivating SHP2, the MAPK, and JAK/STAT pathways. RNA sequencing of patient samples that developed resistance to ALK TKIs showed downregulation of PTPN1 and PTPN2 associated with upregulation of SHP2 expression. Combination of crizotinib with a SHP2 inhibitor synergistically inhibited the growth of wild-type or PTPN1/PTPN2 knock-out ALCL, where it reverted TKI resistance. Thus, we identified PTPN1 and PTPN2 as ALK phosphatases that control sensitivity to ALK TKIs in ALCL and demonstrated that a combined blockade of SHP2 potentiates the efficacy of ALK inhibition in TKI-sensitive and -resistant ALK(+) ALCL.