Chemicals targeting Lipid binding domain (LBD) of 38γ
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA756369 | ENA |
REPOSITORIES: ENA
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Project description:We screened 270,000 compounds from an NCI library for the ability to dock with the non-ATP-binding site of p38γ using virtual screen. The resulting candidate compounds were for cytotoxicity assays to the Hut78 CTCL cell line and identified CSH71 as one of the most promising agents.
2021-08-21 | GSE182484 | GEO
Project description:The estrogen receptor (ER or ERα) remains the primary therapeutic target for luminal breast cancer, with current treatments centered on competitive antagonists, receptor down-regulators, and aromatase inhibitors. This therapeutic landscape frames our discovery of an alternative mechanism of ER inhibition that targets the critical interface between the DNA-binding domain (DBD) and ligand-binding domain (LBD) of the receptor. We identified mitoxantrone (MTO), an FDA-approved topoisomerase II inhibitor, as a specific ligand for this previously unexplored DBD-LBD interface. Through integration of computational, biophysical, biochemical, and cellular analyses, we demonstrate that independent of its DNA damage response activity, MTO binding induces ER conformational changes, leading to cytoplasmic redistribution and proteasomal degradation. Notably, MTO also effectively inhibits constitutively active ER mutants (Y537S and D538G) commonly associated with endocrine therapy resistance, suppressing ER/ER-mutant-dependent gene expression and tumor growth more potently than fulvestrant. These findings establish the DBD-LBD interface as a crucial regulatory point for ER function, suggesting a new paradigm for targeting domain interfaces across the nuclear receptor family.
2025-07-24 | GSE303561 | GEO
Project description:Prostate cancer is a leading cause of cancer related death among men. Current Androgen Receptor (AR) antagonists often target the ligand binding domain (LBD). However, occurrence of resistance to drugs targeting the LBD is common due to emergence of mutations in the LBD or constitutively active variants that lack the LBD itself. Two novel small molecules, VPC-17005 and VPC-14449 targeting the DNA-binding domain have been developed and published previously. In this study, LNCaP cells were treated with one of these drugs or the well-established AR antagonist Enzalutamide, and the transcriptomic changes have been determined using RNA-seq analysis.
2019-07-20 | GSE127816 | GEO
Project description:Aggregated α-synuclein (α-SYN) proteins, encoded by the SNCA gene, are hallmarks of Lewy body disease (LBD), affecting multiple brain regions. However, the specific mechanisms underlying α-SYN pathology in cortical neurons, crucial for LBD-associated dementia, remain unclear. Here, we generated human cortical LBD models by differentiating induced pluripotent stem cells (iPSCs) from SNCA triplication LBD patients into cerebral organoids and observed increased levels of pathological α-SYN in these organoids. Single-cell RNA sequencing revealed prominent expression of the SNCA gene in excitatory neurons, which exhibited synaptic and mitochondrial dysfunction, consistent with findings in the cortex of LBD human brains. Furthermore, screening 1280 FDA-approved drugs identified four candidates, which inhibited α-SYN seeding in RT-QuIC assay, reduced α-SYN aggregation and alleviated mitochondrial dysfunction in SNCA triplication iPSC models. Our findings provide valuable insights into the development of cortical LBD models and the discovery of potential drugs targeting α-SYN aggregation.
2024-09-18 | GSE235914 | GEO
Project description:Targeting lipid metabolism in pancreatic cancer
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Project description:Recent studies indicate that the adaptive immune system plays a role in Lewy body dementia (LBD). However, the mechanism regulating T cell brain homing in LBD is unknown. Here, we observed T cells adjacent to Lewy bodies and dopaminergic neurons in post-mortem LBD brains. Single-cell RNA sequencing of cerebrospinal fluid (CSF) identified upregulated expression of C-X-C Motif Chemokine Receptor 4 (CXCR4) in CD4+ T cells in LBD. CSF protein levels of the CXCR4 ligand, C-X-C Motif Chemokine Ligand 12 (CXCL12) were associated with neuroaxonal damage in LBD. Furthermore, we observed clonal expansion and upregulated Interleukin 17A expression by CD4+ T cells stimulated with a phosphorylated α-synuclein epitope. Thus, CXCR4-CXCL12 signaling may represent a mechanistic target for inhibiting pathological interleukin-17-producing T cell trafficking in LBD.
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Project description:Targeting lipid metabolism in pancreatic cancer [CRISPR]
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Project description:Targeting the ERα DBD-LBD interface with mitoxantrone disrupts receptor function through proteasomal degradation
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Project description:Synaptotagmin-like protein 4 (Slp-4), also known as granuphilin, is a Rab effector responsible for docking insulin secretory vesicles to the plasma membrane prior to exocytosis. Slp-4 binds vesicular Rab proteins via an N-terminal Slp homology (SHD) domain, interacts with plasma membrane SNARE complex proteins via a central linker region, and contains tandem C-terminal C2 domains (C2A and C2B) with affinity for phosphatidylinositol-(4,5)-bisphosphate (PIP2). Its C2A domain has previously been shown to bind PIP2 or its soluble analogues with low micromolar affinity; however, the domain docks with low nanomolar apparent affinity to PIP2 in lipid vesicles that also contain background anionic lipids such as phosphatidylserine (PS). Here we show using a combination of computational and experimental approaches that this high-affinity membrane interaction arises from concerted interaction at multiple sites on the C2A domain. In addition to the previously identified, PIP2-selective lysine cluster, a larger cationic surface surrounding the cluster contributes substantially to the affinity for physiologically relevant lipid compositions. While mutations at the PIP2-selective site decreases affinity for PIP2, multiple mutations are needed to decrease binding to physiologically relevant lipid compositions. Docking and molecular dynamics simulations indicate several conformationally flexible loops that contribute to the nonspecific cationic surface. In addition, we identify and characterize a covalently modified variant in the bacterially expressed protein, which arises through reactivity of the PIP2-binding lysine cluster with endogenous bacterial compounds and has a low membrane affinity. Overall, multivalent lipid binding by the Slp-4 C2A domain provides selective recognition and high affinity docking of large dense-core secretory vesicles to the plasma membrane.
2020-12-08 | PXD021393 | Pride
Project description:Targeting lipid metabolism in pancreatic cancer [RNA-seq]
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