Project description:KAT6A, and its paralog KAT6B, are histone lysine acetyltransferases (HAT) that acetylate histone H3K23 and regulate diverse biological processes including transcription, cell-cycle progression, and stem cell development. KAT6A exerts an oncogenic role in several tumor types including breast cancer where it is amplified in 10-15% of patients. However, pharmacologic targeting of KAT6A to achieve therapeutic benefit has been a challenge. Here we describe identification of a highly potent, selective and orally bioavailable KAT6A/KAT6B inhibitor CTx-648 (PF-9363), derived from a novel benzisoxazole series, which demonstrates anti-tumor activity in correlation with H3K23Ac inhibition in KAT6A over-expressing breast cancer. Transcriptional and epigenetic profiling studies show reduced RNA Pol II binding and downregulation of genes involved in estrogen signaling, cell cycle and stem cell pathways associated with CTx-648 anti-tumor activity in ER-positive (ER+) breast cancer. CTx-648 treatment leads to potent tumor growth inhibition in ER+ breast cancer in vivo models, including models refractory to endocrine therapy, highlighting the potential for targeting KAT6A in ER+ breast cancer.

2023-06-05 | GSE233787 | GEO

Targeting KAT6A/KAT6B dependencies in breast cancer with a novel selective, orally bioavailable KAT6 inhibitor, CTx-648/PF-9363 [ATAC-Seq]

2023-06-05 | GSE233784 | GEO

Targeting KAT6A/KAT6B dependencies in breast cancer with a novel selective, orally bioavailable KAT6 inhibitor, CTx-648/PF-9363 [RNA-Seq]

2023-06-05 | GSE233783 | GEO

ChIP-seq analysis of ENL following KAT6A CRISPR targeting

Project description:ChIP-seq analysis of ENL in MOLM-13 human leukemia cells transduced with lentivirus containing CRISPR-Cas9 EV or sgKAT6A for 5 days

2021-10-20 | GSE165076 | GEO

Targeting KAT6A/KAT6B dependencies in breast cancer with a novel selective, orally bioavailable KAT6 inhibitor, CTx-648/PF-9363 [ChIP-Seq - CUT&RUN]

2023-06-05 | GSE233788 | GEO

Transcriptional profiling of MOLM-13 AML cells following KAT6A CRISPR targeting

Project description:RNA-seq analysis of MOLM-13 human leukemia cells transduced with lentivirus containing CRISPR-Cas9 EV or sgKAT6A for 5 days

2021-10-20 | GSE156948 | GEO

The lysine acetyltransferase KAT6A epigenetically facilitates glucose metabolic programming and CD4+ T-cell responses in autoimmunity

Project description:Epigenetic programs are pivotal regulators of effector CD4+ T cells and determine the fate of many autoimmune disorders. Here, we show that the acetyltransferase KAT6A acts as a novel regulator of glucose metabolism that is required for the proliferation and effector functions of CD4+ T cells in autoimmunity. Clinical analysis shows that KAT6A in CD4+ T cells is linked to the progression of autoimmune Sjogren’s syndrome (SS) . Conditional knockout of KAT6A inhibits the proliferation and Th1/Th17 effector functions of CD4+ T cells both in vitro and that KAT6A-cKO CD4+T cells are less susceptible to induce adjuvant-immunized experimental autoimmune encephalomyelitis (EAE), autoimmune colitis and experimental SS. Combination of metabolomic, epigenetic and transcriptomic analyses show that KAT6A maintains abundant acetylation of H3K9ac and H3K27ac sites of several glycolytic genes, which in turn disrupts the transcriptional activation of MYC and HIF-1α, and potentiates the metabolic programming of glycolysis through its enzymatic amino acid points. Treatment with KAT6A small-molecule inhibitors in various autoimmune mice models shows high therapeutic value for targeting KAT6A to the treatment of autoimmune disorders. Our study reveals a critical role for KAT6A in autoimmunity via the epigenetic modification of glucose metabolic reprogramming and the effector response of CD4+ T cells.

2023-12-09 | GSE241099 | GEO

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