Abstract | BACKGROUND:
Lysine [K] methyltransferase 2A (KMT2A, previously known as MLL) gene rearrangements are common in acute leukemias of various lineages and are associated with features such as chemotherapy resistance and rapid relapse. KMT2A::CBL is a rare fusion of unknown pathogenesis generated by a unique interstitial deletion of chromosome 11 that has been reported across a wide age range in both acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) patients. The leukemogenic effect of the KMT2A::CBL rearrangement and its association with clinical prognosis have not been well clarified. METHODS AND RESULTS: We report the case of a 64-year-old female who was diagnosed with acute monoblastic leukemia (M5a) and who acquired the rare KMT2A::CBL fusion. The patient received multiple cycles of therapy but did not achieve remission and eventually succumbed to severe infection and disease progression. Additionally, we characterized the predicted KMT2A-CBL protein structure in this case to reveal the underlying leukemogenic mechanisms and summarized reported cases of hematological malignancies with KMT2A::CBL fusion to investigate the correlation of gene rearrangements with clinical outcomes. CONCLUSIONS: This report provides novel insights into the leukemogenic potential of the KMT2A::CBL rearrangement and the correlation between gene rearrangements and clinical outcomes.
|
Authors | Jinglei Yu, Fengmei Song, Mingming Zhang, Pingnan Xiao, Jingjing Feng, Ruimin Hong, Yongxian Hu, He Huang, Guoqing Wei |
Journal | Molecular biology reports
(Mol Biol Rep)
Vol. 51
Issue 1
Pg. 561
(Apr 21 2024)
ISSN: 1573-4978 [Electronic] Netherlands |
PMID | 38643442
(Publication Type: Case Reports, Journal Article)
|
Copyright | © 2024. The Author(s). |
Topics |
- Female
- Humans
- Middle Aged
- Leukemia, Monocytic, Acute
(genetics)
- Leukemia
- Disease Progression
- Gene Rearrangement
(genetics)
- Hematologic Neoplasms
|