Reference Detail

Ref Type Journal Article
PMID (18971950)
Authors Chase A, Schultheis B, Kreil S, Baxter J, Hidalgo-Curtis C, Jones A, Zhang L, Grand FH, Melo JV, Cross NC
Title Imatinib sensitivity as a consequence of a CSF1R-Y571D mutation and CSF1/CSF1R signaling abnormalities in the cell line GDM1.
Journal Leukemia
Vol 23
Issue 2
Date 2009 Feb
URL
Abstract Text Imatinib is usually a highly effective treatment for myeloproliferative neoplasms (MPNs) associated with ABL, PDGFRA or PDGFRB gene fusions; however, occasional imatinib-responsive patients have been reported without abnormalities of these genes. To identify novel imatinib-sensitive lesions, we screened 11 BCR-ABL-negative cell lines and identified GDM1, derived from a patient with an atypical MPN (aMPN), as being responsive to imatinib. Screening of genes encoding known imatinib targets revealed an exon 12 mutation in the colony-stimulating factor 1 receptor (CSF1R; c-FMS) with a predicted Y571D amino-acid substitution. CSF1R in GDM1 was constitutively phosphorylated, but rapidly dephosphorylated on exposure to imatinib. Y571D did not transform FDCP1 cells to growth factor independence, but resulted in a significantly increased colony growth compared with controls, constitutive CSF1R phosphorylation and elevated CSF1R signaling. We found that GDM1 expresses CSF1, and CSF1 neutralization partially inhibited proliferation, suggesting the importance of both autocrine and intrinsic mechanisms of CSF1R activation. An extensive screen of CSF1R in aMPNs and acute myeloid leukemia identified three additional novel missense variants. None of these variants were active in transformation assays and are therefore likely to be previously unreported rare polymorphisms or non-pathogenic passenger mutations.

Filtering

  • Case insensitive filtering will display rows where any text in any cell matches the filter term
  • Simple literal full or partial string matches
  • Separate multiple filter terms with a spaces, order doesn't matter (a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page, filtering has no impact on query parameters
  • Use quotes to match a longer phrase which contains spaces "mtor c1483f"

Sorting

  • Generally, the default sort order for tables is set to be first column ascending, however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column, be sure to set ascending or descending order for a given column, before moving on to the next column.

Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Therapy Description
Drug Name Trade Name Synonyms Drug Classes Drug Description
Variant Impact Protein Effect Variant Description Associated with drug Resistance
G413S missense unknown CSF1R G413S lies within the Ig-like C2-type domain 5 of the Csf1r protein (UniProt.org). G413S has been identified in the scientific literature (PMID: 23889897, PMID: 18971950, PMID: 25957691, PMID: 25589618), but has not been biochemically characterized and therefore, its effect on Csf1r protein function is unknown (PubMed, Oct 2018).
Y571D missense gain of function CSF1R Y571D lies within the regulatory juxtamembrane domain of the Csf1r protein (UniProt.org). Y571D was shown to result in constitutive activation of the Csf1r protein, increased colony growth, and elevated Csf1r signaling in cultured cells (PMID: 18971950).
Y969F missense unknown CSF1R Y969F lies within the cytoplasmic domain of the Csf1r protein (UniProt.org). Y969F has not been biochemically characterized, but results in increased transforming ability compared to wild-type Csf1r protein in cell culture (PMID: 18971950).
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
CSF1R Y571D myeloid leukemia sensitive Imatinib Preclinical Actionable In a preclinical study, CSFR1 Y571D conferred sensitivity to Gleevec (imatinib) in myeloid cell lines in culture (PMID: 18971950). 18971950