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Identification of the covalent binding site of Ibrutinib and 5Z-7-Oxozeaenol to ZAK

ABSTRACT: The goal of this experiment was to identify the reaction site of Ibrutinib and 5Z-7-Oxozeaenol to ZAK by determination of mass shifts according to a covalent modification by the inhibitors using mass spectrometry.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Homo Sapiens (human)

SUBMITTER: Maria Faelth Savitski

LAB HEAD: Marcus Bantscheff

PROVIDER: PXD007752 | Pride | 2017-10-13

REPOSITORIES: Pride

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			Action	DRS
	55831_F1_R2_P0132328A01.raw.gz	Raw
	55831_F1_R2_P0132329A01.raw.gz	Raw
	55864_F1_R1_P0135505A01.raw.gz	Raw
	55865_F1_R1_P0135513A01.raw.gz	Raw
	F270382.dat	Other

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Publications

Differential Kinobeads Profiling for Target Identification of Irreversible Kinase Inhibitors.

Dittus Lars L Werner Thilo T Muelbaier Marcel M Bantscheff Marcus M

ACS chemical biology 20170912 10

Chemoproteomics profiling of kinase inhibitors with kinobeads enables the assessment of inhibitor potency and selectivity for endogenously expressed protein kinases in cell lines and tissues. Using a small panel of targeted covalent inhibitors, we demonstrate the importance of measuring covalent target binding in live cells. We present a differential kinobeads profiling strategy for covalent kinase inhibitors where a compound is added either to live cells or to a cell extract that enables the co ...[more]

PMID: 28876896

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Confirmation of ZAK as covalent target of Ibrutinib

Project description:The goal of this experiment was the confirmation of ZAK as a covalent target of Ibrutinib by an affinity enrichment experiment with a linkable analogue of Ibrutinib.

2017-10-13 | PXD007638 | Pride

Ibrutinib induces a global chromatin reorganisation in chronic lymphocytic leukaemia

Project description:Chronic lymphocytic leukaemia (CLL) is the most common haematological malignancy in developed countries. Ibrutinib (PCI-32765), a specific and irreversible inhibitor of Bruton's Tyrosine Kinase (BTK) represents a major step forward in the treatment of CLL. We have undertaken a detailed analysis of the changes happening to the chromatin structure in CLL cells from patients continuously receiving oral doses of ibrutinib. ChIP-seq has been performed for H3K4me3, H3K27ac, H3K27me3 and EZH2 up to 56 days following the beginning of the treatment. We observed that Ibrutinib-dependent lymphocytosis correlates with a global and transient recruitment of EZH2 to active cis-regulatory elements and increased H3K27me3.

2019-06-01 | E-MTAB-6410 | biostudies-arrayexpress

Chromatin structure analysis for two patients on Ibrutinib and showing disease progression in chronic lymphocytic leukaemia

Project description:Chronic lymphocytic leukaemia (CLL) is the most common haematological malignancy in developed countries. Ibrutinib (PCI-32765), a specific and irreversible inhibitor of Bruton's Tyrosine Kinase (BTK) represents a major step forward in the treatment of CLL, but cases of resistance are emerging. We have undertaken a detailed analysis of the changes happening to the chromatin structure in CLL cells from two patients on ibrutinib and showing disease progression. ChIP-seq has been performed for H3K4me3, H3K27ac and H3K27me3. We observed chromatin alterations independent of the disease progression. Raw data is available in EGA under controlled access with accession EGAD00001005220

2020-09-01 | E-MTAB-8220 | biostudies-arrayexpress

Differential impact of BTK active site inhibitors on the conformational state of full-length BTK

Project description:Bruton’s tyrosine kinase (BTK) is targeted in the treatment of B-cell disorders including leukemias and lymphomas. Currently approved BTK inhibitors, including Ibrutinib, a first-in-class covalent inhibitor of BTK, bind directly to the kinase active site. While effective at blocking the catalytic activity of BTK, consequences of drug binding on the global conformation of full-length BTK are unknown. Here we uncover a range of conformational effects in full-length BTK induced by a panel of active site inhibitors, including unexpected shifts in the conformational equilibria of the regulatory domains. Additionally, we find that a remote Ibrutinib resistance mutation, T316A in the BTK SH2 domain, drives spurious BTK activity by destabilizing the compact autoinhibitory conformation of full-length BTK, shifting the conformational ensemble away from the autoinhibited form. Future development of BTK inhibitors will need to consider long-range allosteric consequences of inhibitor binding, including the emerging application of these BTK inhibitors in treating COVID-19.

2020-11-25 | PXD020029 | Pride

Proteoform-level drug target landscapes demonstrates a wider spectrum of ibrutinib targets

Project description:In this study, we investigated the target landscape of the drug ibrutinib using thermal proteome profiling (TPP) and proteoform detection. Our findings demonstrated that ibrutinib interacts with multiple proteoforms, beyond its known targets. Specifically, we identified interactions related to immunomodulation, Golgi trafficking, endosomal trafficking, and glycosylation. These insights shed light on the clinical off-target effects and adverse events associated with ibrutinib. Moreover, our study emphasizes the significance of studyin drug interactions at the proteoform level and its potential implications for precision medicine.

2024-11-24 | PXD047187 | Pride

ABPP of Ibrutinib Resistance in B Cell Malignancies

Project description:Ibrutinib,a novel Bruton'styrosine kinase inhibitor, demonstrated high response rates in B-cell lymphomas but a growing number of ibrutinib treated patients relapse with resistance, fulminant progression and accelerated mortality. Using chemical proteomics and a high-throughput ex vivo assay in a reconstructed tumor microenvironment (TME), we determined the molecular basis for ibrutinib activity and mechanism of acquired ibrutinib resistance. Reciprocal activation of PI3K-AKT-mTOR and integrin β1 signaling were identified as a signaling hub of kinome for ibrutinib resistance, resulting in enforced TME-lymphoma interactions, promoting mantle cell lymphoma (MCL) growth and drug resistance. Combinatorial disruption of BCR signaling and ibrutinib resistance associated pathways led to release of MCL cells from TME, reversal of drugresistance and enhanced anti-MCL activity in murine and patient-derived xenograft models. This study integrated TME-mediated de-novo and acquired drug resistance mechanisms and provides the rationale for novel combination therapeutic strategy against MCL and other B cell malignancies.

2018-10-26 | PXD005734 | Pride

EGR1-mediated ibrutinib resistance

Project description:We established two representative ABC DLBCL cell lines (TMD8 and OCI-Ly10) with ibrutinib resistance by gradually increasing the concentration of ibrutinib during passage in culture. RNA-seq analysis demonstrated that the BCR pathway gene signature is enriched in resistant cell lines when compared to parental cells. The most upregulated gene is EGR1, a transcription factor that activates multiple oncogenic pathways including MYC and E2F. Elevated EGR1 expression is also observed in ibrutinib-resistant primary mantle cell lymphoma cells when treated with ibrutinib. Using multiple metabolic and genetic approaches, we discovered that overexpression of EGR1 causes metabolic reprogramming to oxidative phosphorylation (OXPHOS) and ibrutinib resistance. Mechanistically, EGR1 mediates metabolic reprogramming through transcriptional activation of PDP1, a phosphatase that dephosphorylates and activates the E1 component of the large pyruvate dehydrogenase complex. Therefore, EGR1-mediated PDP1 activation accelerates intracellular ATP production via the mitochondrial tricarboxylic acid (TCA) cycle, leading to sufficient energy to enhance the proliferation and survival of ibrutinib-resistant lymphoma cells. Finally, we demonstrate that targeting OXPHOS with IM156, a newly developed OXPHOS inhibitor, inhibits the growth of ibrutinib-resistant lymphoma cells both in vitro and in patient-derived xenograft mouse models.

2023-12-06 | GSE223150 | GEO

Gene expression profile analysis of PLS-123 in OCI-Ly7 cells

Project description:To exploit targets or signaling pathways affected by PLS-123 during anti-tumor process, gene expression profiling was carried out in representative OCI-Ly7 cells treated for 48 hours. OCI-Ly7 cells were treated with ibrutinib, PLS-123 or vehicle for 48 hours.

2015-02-11 | E-GEOD-65816 | biostudies-arrayexpress

Gene expression profiles of ibrutinib-responsive and ibrutinib non-responsive cells in ERBB4 expressing cancer cell lines

Project description:By using a unique functional protein microarray platform, we found that the FDA approved drug ibrutinib can inhibits ERBB4 activity in the same nM range as its canonical target, BTK. Cell-based assays revealed that ibrutinib treatment inhibited cell growth in some ERBB4 expressing cancer cells whereas no response was observed in other cells. Therefore, to identify global gene expression differences between ibrutinib responsive and non-responsive cancer cells, we performed RNA-Seq, and identified a signature featuring the WNT pathway that predicts growth responsiveness to ibrutinib in ERBB4 expressing cancers.

2018-02-07 | GSE102744 | GEO

Ibrutinib effects on in vitro exhausted CTL

Project description:CTL exhaustion is driven by chronic antigen stimulation and is characterized by specific molecular, phenotypic and functional changes. Reversing CTLs exhaustion with immune checkpoint blockade (ICB) has provided clinical benefits in different types of cancer. However, the therapeutic effects of ICB varies among patients and cancer types. Ibrutinib, a potent BTK inhibitor, is reported that it improved T cell function in ibrutinib long-term treated chronic lymphocytic leukemia patients. However, the mechanism remains unclear. We hypothesized ibrutinib can directly act on CD8+ T cells and reinvigorates exhausted CTLs. To test this, we generated in vitro exhausted OT-I cells as previously described (Zhao M et al PLoS Pathog. 16(6): e1008555) by repeatedly stimulating cells with SIINFEKL peptide. We tested the effect of ibrutinib on inhibitory receptor, exhaustion-related transcription factor expression and cytokine (IFNγ, TNFα and IL-2) production. We found that ibrutinib decreased the expression of multiple inhibitory receptors on in vitro exhausted CTL while the critical transcription factor, Tox was downregulated. The cytokine production of exhausted cells was partially improved after ibrutinib treatment. Importantly, using btk deficient mice we found the effect of ibrutinib was independent of BTK expression. To conclude, these findings suggest that ibrutinib reduces CTL exhaustion. Our study provides evidence for ibrutinib’s synergistic use with cancer immunotherapy.

2023-09-06 | GSE220433 | GEO

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