Isolated molecular relapse in FIP1L1-PDGFRalpha hypereosinophilic syndrome after discontinuation and single weekly dose of imatinib: need of quantitative molecular procedures to modulate imatinib dose.
Our study shows that treatment with mepolizumab, an agent designed to target eosinophils, can result in corticosteroid-sparing for patients negative forFIP1L1-PDGFRA who have the hypereosinophilic syndrome.
The fusion protein between the platelet-derived growth factor receptor alpha (PDGFRalpha, P) gene and the Fip1-like1 (FIP1L1, F) may be identified in 14 to 60% of HES and it indicates a clonal hypereosinophilic syndrome called F/P-positive CEL.
Clinical features of hypereosinophilic syndrome: FIP1L1-PDGFRA fusion gene-positive disease is a distinct clinical entity with myeloproliferative features and a poor response to corticosteroid.
The FIP1L1-PDGFRalpha fusion tyrosine kinase in hypereosinophilic syndrome and chronic eosinophilic leukemia: implications for diagnosis, classification, and management.
We tested its effectiveness against fusion tyrosine kinases TEL-platelet-derived growth factor receptorbeta (TEL-PDGFRbeta) and FIP1-like-1 (FIP1L1)-PDGFRalpha, which cause chronic myelomonocytic leukemia and hypereosinophilic syndrome, respectively.
The hypereosinophilic syndrome: fluorescence in situ hybridization detects the del(4)(q12)-FIP1L1/PDGFRA but not genomic rearrangements of other tyrosine kinases.
The FIP1L1-PDGFRalpha fusion tyrosine kinase in hypereosinophilic syndrome and chronic eosinophilic leukemia: implications for diagnosis, classification, and management.
The discovery of the FIP1L1-PDGFRA fusion gene in the hypereosinophilic syndrome is an example of the power of clinical translational research and identifies interstitial chromosomal deletion as a novel mechanism to generate oncogenic tyrosine kinase fusion genes.
We recently identified the chimeric kinase FIP1L1-platelet-derived growth factor receptor alpha (PDGFRalpha) as a cause of the hypereosinophilic syndrome and of chronic eosinophilic leukemia.