Abstract:
:The overall survival of patients with acute myeloid leukemia (AML) is poor and identification of new disease-related therapeutic targets remains a major goal for this disease. Here we show that expression of MPP1, a PDZ-domain-containing protein, highly correlated with ABCC4 in AML, is associated with worse overall survival in AML. Murine hematopoietic progenitor cells overexpressing MPP1 acquired the ability to serially replate in methylcellulose culture, a property crucially dependent upon ABCC4. The highly conserved PDZ-binding motif of ABCC4 is required for ABCC4 and MPP1 to form a protein complex, which increased ABCC4 membrane localization and retention, to enhance drug resistance. Specific disruption of this protein complex, either genetically or chemically, removed ABCC4 from the plasma membrane, increased drug sensitivity, and abrogated MPP1-dependent hematopoietic progenitor cell replating in methylcellulose. High-throughput screening identified Antimycin A as a small molecule that disrupted the ABCC4-MPP1 protein complex and reversed drug resistance in AML cell lines and in primary patient AML cells. In all, targeting the ABCC4-MPP1 protein complex can lead to new therapies to improve treatment outcome of AML, a disease where the long-term prognosis is poor.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Pitre A,Ge Y,Lin W,Wang Y,Fukuda Y,Temirov J,Phillips AH,Peters JL,Fan Y,Ma J,Nourse A,Sinha C,Lin H,Kriwacki R,Downing JR,Gruber TA,Centonze VE,Naren AP,Chen T,Schuetz JDdoi
10.1038/s41467-017-01678-ysubject
Has Abstractpub_date
2017-11-16 00:00:00pages
1547issue
1issn
2041-1723pii
10.1038/s41467-017-01678-yjournal_volume
8pub_type
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