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Updated: Aug 23, 2025
10:49
Pre-clinical Evaluation of Tyrosine Kinase Inhibitors for Treatment of Acute Leukemia
Published on: September 18, 2013
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A Therapeutically Targetable NOTCH1-SIRT1-KAT7 Axis in T-cell Leukemia
Olga Lancho1, Amartya Singh1,2, Victoria da Silva-Diz1
1Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, New Jersey.
Blood Cancer Discovery
|November 2, 2022
Summary
Researchers discovered a new therapeutic strategy for T-cell acute lymphoblastic leukemia (T-ALL) by targeting the NOTCH1-SIRT1-KAT7 pathway. Inhibiting SIRT1 shows significant anti-leukemic effects, offering a promising avenue for novel T-ALL treatments.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- T-cell acute lymphoblastic leukemia (T-ALL) is driven by NOTCH1 signaling and requires new therapeutic approaches.
- The NOTCH1-SIRT1-KAT7 molecular axis represents a potential therapeutic vulnerability in T-ALL.
Purpose of the Study:
- To investigate the role of the NOTCH1-SIRT1-KAT7 pathway in T-ALL pathogenesis.
- To evaluate the therapeutic potential of targeting SIRT1 in T-ALL.
Main Methods:
- NOTCH1-SIRT1-KAT7 interaction analysis.
- Pharmacologic and genetic inhibition of SIRT1.
- Global acetyl proteomics and H4K12ac profiling.
- Metabolic and gene-expression profiling.
Main Results:
- SIRT1 is overexpressed downstream of a NOTCH1-bound enhancer in T-ALL.
- SIRT1 loss impairs leukemia generation; SIRT1 overexpression accelerates leukemia and confers resistance to NOTCH1 inhibition.
- SIRT1 inhibition demonstrates significant antileukemic effects.
- SIRT1 inhibition leads to KAT7 hyperacetylation and reduced H4K12ac, impacting cell proliferation.
Conclusions:
- The NOTCH1-SIRT1-KAT7 axis is a critical therapeutic target in T-ALL.
- Targeting SIRT1, partly via KAT7 inactivation, exhibits potent antileukemic activity.
- A regulatory rheostat between deacetylase and acetyltransferase activity is identified with potential broader cancer implications.
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