MLL rearrangement

P2, N=10, Recruiting, Fred Hutchinson Cancer Center | Trial primary completion date: Dec 2024 --> Jun 2024

P2, N=54, Recruiting, Fred Hutchinson Cancer Center | Not yet recruiting --> Recruiting

We characterize the KMT2A fusions present in myeloid malignant samples. We also describe the abundance of KMT2A PTDs in both healthy donor and myeloid samples, with myeloid cases showing significantly higher PTD read counts. KMT2A PTD read count >2000 is present only in malignant samples but not in healthy donors.

P2, N=46, Active, not recruiting, Memorial Sloan Kettering Cancer Center | Trial completion date: Feb 2024 --> Feb 2025 | Trial primary completion date: Feb 2024 --> Feb 2025

Compared to each drug, co-treatment with FHD-286 and BETi, MI, decitabine or venetoclax significantly reduced AML burden and improved survival, without inducing significant toxicity. These findings highlight the FHD-286-based combinations as promising therapy of AML with MLL1r or mtNPM1.

Additionally, utilizing population pharmacokinetic modelling (6051 concentrations from 815 patients), we identified the significant impact of physiological maturation, estimated glomerular filtration rate, sex and concurrent dasatinib administration on MTX pharmacokinetics...The findings underscore the critical role of HDMTX in treating IR/HR populations and call for a reassessment of its application in lower-risk groups. An individualized pharmacokinetic dosage regimen could achieve the most optimal results, ensuring the largest proportion of steady-state concentrations within the optimal range.

Our study first identify vulnerability to ferroptosis by regulating MAGEA6-AMPK-SLC7A11-GPX4 signaling pathway. Combined treatment with HMAs and FINs provides a potential therapeutic choice for AML patients, especially for R/R-AML.

The findings underscore the significance of LAMP5-AS1 in MLL leukemia progression through the regulation of the autophagy pathway. Additionally, this study unveils the novel lncRNA-DOT1L-LAMP5 axis as promising therapeutic targets for degrading MLL fusion proteins.

It is very important to analyze the maintenance role of PHF6 in AML, which is different from its tumor-suppressing function in T-cell acute lymphoblastic leukemia (T-ALL). Our study showed that inhibiting PHF6 expression may be a potential therapeutic strategy targeting AML patients.

Our results suggest that JOA may be considered a promising anti-leukemia compound to develop to surmount the differentiation block in AL patients.

P2, N=31, Recruiting, Memorial Sloan Kettering Cancer Center | Trial completion date: Dec 2023 --> Dec 2025

P=N/A, N=11, Completed, Universitair Ziekenhuis Brussel | Unknown status --> Completed | Phase classification: P1/2 --> PN/A | N=20 --> 11

We performed cell viability experiments on leukemia cell lines (MV4; 11, MOLM13, RS4; 11, THP1, SEM, KOPN8, NOMO1, HL60, ML2) with single, two and three drug combinations using a menin inhibitor (VTP50469), a DOT1L inhibitor (EPZ5676), and a CDK9 inhibitor (AZD4573). Based on our preclinical in vitro findings, the co-inhibition of menin-DOT1L or menin-CDK9 is a promising approach for the treatment of MLL-r leukemia. The varying responses of different MLL-r leukemia cell lines to drug combination treatment indicate that not all cases of MLL-r leukemia will respond uniformly to treatment combinations. Taken together, our data provide a strategy to determine optimal treatment combinations for personalized treatment of MLL-r leukemia.

They were all maintemanced with chidamide, except one with chidamide plus sorafenib. Maintenance therapy with chidamide might decrease the relapse in fusion gene-positive AML patients with MRD-positive or ELN-high risk, who could not take allo-HSCT, and prolong their survival, with a well toleration.

P2, N=10, Recruiting, Fred Hutchinson Cancer Center | Trial primary completion date: Nov 2022 --> Dec 2024

Haplo-HSCT is not inferior to HLA-matched transplant. The children with MLL rearrangement had an acceptable 5-year OS, while complications and relapse should be monitored.

We also demonstrated that CAD204520 treatment of MLLr cells significantly reduces NOTCH1 and its target genes as well as NOTCH1 receptor expression. This was not observed with a comparable cytarabine treatment, indicating the specificity of the small molecule...In conclusion, our findings uncover the oncogenic relevance of the NOTCH1 pathway in MLLr leukemia. Its inhibition leads to specific anti-leukemic effects and paves the way for further evaluation in clinical settings.

P=N/A, N=200, Recruiting, Masonic Cancer Center, University of Minnesota | Trial completion date: Oct 2023 --> Oct 2025 | Trial primary completion date: Oct 2023 --> Oct 2024

In this study, we present the in vivo effectiveness of DS-1594b in combination with venetoclax in a PDX model of NPM1-mutated AML. Moreover, the combination treatment exhibits differentiation-inducing effects, which contribute to its therapeutic effectiveness, and was safe. Overall, our findings strongly indicate that the combination of DS-1594b and venetoclax exhibits promising anti-leukemic activity in vivo and holds potential as a therapeutic strategy for AML patients with mtNPM1 mutations.

Overall, our findings indicate that Latino children are significantly less likely to have favorable cytogenetic subtypes, TCF3::PBX1 and iAMP21 and prognostically neutral cytogenetics. Further evaluation of cytogenetic subtypes and race/ethnicity may elucidate their contribution to outcome disparities.

Background: Bisantrene (Bis), is a topoisomerase-II inhibitor with anthracycline-like activity, lower cardiotoxicity, and activity in patients (pts) with relapsed (rel)/primary refractory (PR) acute myeloid leukemia (AML) (Am J Hematol, 2021). In this Phase II study in a very advanced group of relapsed refractory AML pts resistant to multiple previous lines of chemotherapy including transplantation and with a median of 50% blasts at study initiation, Bis/Clo/Flu combination therapy was found to be safe and well tolerated without cardiac toxicity or tumor lysis syndrome. The maximum length of Bis/Clo/Flu administration was 4 days due to rapidly reversible liver toxicity, and transaminitis. As expected in this highly pretreated population, the infection rates were high.

Finally, high expression of BRCA1 and BRCA2 genes in the host cells, at remission, is strongly correlated with a higher risk of relapse. Although this study has been performed with an adequate number of children with B-ALL, it is mandatory to perform a prospective project with a larger population.

1) Extensive genetic profiling indicated a substantial clonal evolution in the progression from CP to BP CML including loss of ASXL1 mutations, expansion of RUNX1 mutated clones, multiple CNA, and the frequent acquisition of a BCR rearrangement in BP with a transcriptomic phenotype resembling B-ALL. 2) A subset of CML cases in CP already showed a transcriptomic phenotype resembling acute leukemia indicating a rapid progression to BP. 3) The presence of a RUNX1 mutated subclone or a clonal BCR rearrangement seem to represent a warning signal in CML CP.

Targeting MLLT1/3 is an attractive approach and has the potential for single agent activity across a broad range of molecular defined acute leukemias, with a differential profile to menin inhibitors.

We utilized genetic and pharmacological (mycophenolate mofetil, MMF, a purine biosynthesis inhibitor of IMPDH) approaches to target the enhanced purine metabolism and found inhibition of the purine synthesis pathway promotes myeloid differentiation of both murine and human LSCs...Moreover, we found that the myeloid differentiation induced by MMF or CX-5461 is associated with reduced chromatin occupancy of the MLL-AF9 complex, especially Menin, and downregulated expression of MLL-AF9 target genes, such as Meis1, Hoxa9, and Myc, suggesting a regulatory role of nucleolar rRNA transcription on MLL-AF9 oncogenic gene expression program...Altogether, our findings reveal that purine metabolism maintains nucleolar rRNA transcription homeostasis to modulate MLL fusion complex-induced leukemogenic transcriptional activity in LSCs. The enhanced purine metabolism emerges as a crucial dependency for LSCs, providing potential targets for novel therapeutic strategies in treating MLL-rearranged leukemia.

Study confirmed that MLL-rearranged ALL cells are highly sensitive to the broad-spectrum HDAC inhibitor panobinostat. Furthermore, when exploring therapeutic options for targeting MLLr-AML, we found that combining the BCL-2 inhibitor Venetoclax (VEN) with an MLL-Menin specific inhibitor (MEN1i) specifically downregulated the expression of HDAC9 and had a favorable synergistic killing effect on MLLr-AML in both in vitro and in vivo models, further suggesting an important role of HDAC9 in the treatment of MLLr-AML. To sum up, through this study, we can shed light on the role of specific HDAC molecules in MLLr-AML and provide a new potential target for the degradation of MLL fusion protein to eradicate MLLr-AML.

The rapid demise of these two patients with BRAF V600E-mutant AML highlights their poor prognosis. Few cases of BRAF V600E-mutant AML have been described in the literature, all of which reported poor survival. Intriguingly, most cases exhibited monocytic morphology and concurrent KMT2A rearrangements, as was observed in case 2.

He started therapy with azacitidine and venetoclax and achieved morphologic remission, measurable residual disease positive (<0.01%). Deletion of chromosome 11q is a rare chromosomal lesion in myeloid malignancies. As the mixed lineage leukemia (MLL) gene is located at the long arm of chromosome 11, it is commonly associated with poor prognosis, especially in therapy-related settings. Although no MLL rearrangement was detected in our case, the multiple relapses and persistent disease despite chemotherapy might be potentially due to having additional EWSR1::FLI1 fusion.

P1/2, N=440, Recruiting, Syndax Pharmaceuticals | Trial completion date: Apr 2026 --> Dec 2024 | Trial primary completion date: Apr 2025 --> Dec 2024

P3, N=5937, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Jan 2024 --> Sep 2024

P2, N=156, Completed, Masonic Cancer Center, University of Minnesota | Active, not recruiting --> Completed | Trial completion date: Mar 2024 --> May 2023

P1 | "Preclinical data from BMF-219, an investigational, highly selective, orally bioavailable, small-molecule covalent inhibitor of menin, show sustained potent abrogation of menin-dependent oncogenic signaling...Main Outcome Measures: Primary: Incidence of DLTs, treatment-emergent adverse events, and serious adverse events. Secondary: Best overall response rate, duration of response, progression-free survival, and time to progression per disease-specific response criteria."

Modified COG0232 protocol significantly improved survival outcomes by reducing mortality. HR-ALL represents chemotherapy-resistant subtype and early intensification with immunotherapy post induction may further improve long-term outcomes for this subtype.

It is important to be aware that patients with a history of chemotherapy or radiation therapy may develop t-LLA. When there are skin lesions present, it is crucial to distinguish between a secondary (new) neoplasm versus a recurrence of a known primary, as the treatment and prognosis will differ greatly. Cutaneous manifestations of leukemia can be very polymorphic and may mimic a great number of dermatological conditions, making the diagnosis of LC challenging; therefore, it is critical to always consider ulcers among the ample range of possible presentations.

P2, N=54, Not yet recruiting, Fred Hutchinson Cancer Center

In this perspective, we examine the ENL and AF9 proteins with attention to recent work characterizing the epigenetic reading YEATS domains and AHD on both the wild type proteins and when fused to MLL. We summarize drug development efforts and their therapeutic potential and assess ongoing research that has refined our understanding of how these proteins function, which continues to reveal new therapeutic avenues.

No abstract available