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Updated: Feb 25, 2026

Intracellular Phosphoflow Cytometry of Acute Myeloid Leukemia Patient-Derived Xenotransplants
Published on: June 6, 2025
T315I clone selection in a Ph+ all patient under low-dose ponatinib maintenance
Jasmine Noetzli1, Mathilde Gavillet1, Stavroula Masouridi-Levrat2
1Service and Central Laboratory of Hematology University Hospital of Lausanne (CHUV) Lausanne Switzerland.
Abstract:
We report here the clinical course of a Ph+ ALL patient who was treated with ponatinib 15 mg/day, as maintenance therapy, and developed a BCR-ABL T315I mutation leading to ALL relapse. This clonal evolution was reversed, without adverse effects, by increasing ponatinib to 45 mg/day. To our knowledge, we have been confronted with the first clinical case of a T315I clonal selection of ALL caused by subeffective therapeutic level of the drug. This single patient experience highlights the risk of T315I clone selection in Ph+ ALL treated with reduced dose ponatinib.
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