Structure-Based Discovery of Potent WD Repeat Domain 5 Inhibitors that Demonstrate Efficacy and Safety in Preclinical Animal Models
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PROVIDER: PRJNA838577 | ENA |
REPOSITORIES: ENA
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Project description:WD repeat domain 5 (WDR5) is a core scaffolding component of many multi-protein complexes that perform a variety of critical chromatin-centric processes in the nucleus. WDR5 is component of the mixed lineage leukemia MLL/SET complex and localizes MYC to chromatin tumor-critical target genes. Overexpression of WDR5 promotes oncogenesis in a variety of human cancers that are often associated with poor prognoses. Thus, WDR5 has been recognized as an attractive therapeutic target for treating both solid and hematological tumors. Previously, small-molecule WDR5 WIN-site inhibitors and WDR5 degraders have demonstrated robust in vitro cellular efficacy in cancer cell lines and established the therapeutic potential of WDR5. However, these agents have not demonstrated significant in vivo efficacy at pharmacologically relevant doses by oral administration in animal disease models. We have discovered WDR5 WIN-site inhibitors that feature bicyclic heteroaryl P7 units through structure-based design and address the limitations of our previous series of small-molecule inhibitors. Importantly, our new lead compounds exhibit enhanced on-target potency, excellent oral pharmacokinetic (PK) profiles, and potent dose-dependent in vivo efficacy in a mouse MV4:11 subcutaneous xenograft model by oral dosing. Furthermore, these in vivo probes show excellent tolerability under a repeated high dose regimen in rodents to demonstrate the safety of the WDR5 WIN site inhibition mechanism. Collectively, our results provide strong support for WDR5 WIN-site inhibitors to be utilized as potential anticancer therapeutics.
2022-10-01 | GSE203101 | GEO
Project description:WD repeat domain 5 (WDR5) is a core scaffolding component of many multiprotein complexes that perform a variety of critical chromatin-centric processes in the nucleus. WDR5 is a component of the mixed lineage leukemia MLL/SET complex and localizes MYC to chromatin at tumor-critical target genes. As a part of these complexes, WDR5 plays a role in sustaining oncogenesis in a variety of human cancers that are often associated with poor prognoses. Thus, WDR5 has been recognized as an attractive therapeutic target for treating both solid and hematological tumors. Previously, small-molecule inhibitors of the WDR5-interaction (WIN) site and WDR5 degraders have demonstrated robust in vitro cellular efficacy in cancer cell lines and established the therapeutic potential of WDR5. However, these agents have not demonstrated significant in vivo efficacy at pharmacologically relevant doses by oral administration in animal disease models. We have discovered WDR5 WIN-site inhibitors that feature bicyclic heteroaryl P7 units through structure-based design and address the limitations of our previous series of small-molecule inhibitors. Importantly, our lead compounds exhibit enhanced on-target potency, excellent oral pharmacokinetic (PK) profiles, and potent dose-dependent in vivo efficacy in a mouse MV4:11 subcutaneous xenograft model by oral dosing. Furthermore, these in vivo probes show excellent tolerability under a repeated high-dose regimen in rodents to demonstrate the safety of the WDR5 WIN-site inhibition mechanism. Collectively, our results provide strong support for WDR5 WIN-site inhibitors to be utilized as potential anticancer therapeutics.
| S-EPMC9910433 | biostudies-literature
Project description:WD repeat domain 5 (WDR5) is a nuclear scaffolding protein that forms many biologically important multiprotein complexes. The WIN site of WDR5 represents a promising pharmacological target in a variety of human cancers. Here, we describe the optimization of our initial WDR5 WIN-site inhibitor using a structure-guided pharmacophore-based convergent strategy to improve its druglike properties and pharmacokinetic profile. The core of the previous lead remained constant while a focused SAR effort on the three pharmacophore units was combined to generate a new in vivo lead series. Importantly, this new series of compounds has picomolar binding affinity, improved cellular antiproliferative activity and selectivity, and increased kinetic aqueous solubility. They also exhibit a desirable oral pharmacokinetic profile with manageable intravenous clearance and high oral bioavailability. Thus, these new leads are useful probes toward studying the effects of WDR5 inhibition.
| S-EPMC10081510 | biostudies-literature
Project description:Thomasclavelia ramosa strain:WD-I2 Genome sequencing and assembly
| PRJNA924240 | ENA
Project description:T cell-engaging therapies involving bispecific T cell engager (BiTE) and chimeric antigen receptor T (CAR-T) cells have achieved great success in the treatment of hematological tumors. However, the paucity of ideal cell surface molecules that can be targeted on glioblastoma (GBM) partially reduces the immunotherapeutic efficacy. Recently, high expression of Fn14 has been reported in several solid tumors, so the strategy of exploiting this specific antigen for GBM immunotherapy is worth studying. Consequently, we constructed Fn14× CD3 BiTE and Fn14-specific CAR-T cells and investigated their cytotoxic activity against GBM in vitro and in vivo. First, expression of Fn14 was confirmed in glioma tissues and GBM cells. Then, we designed Fn14-specific BiTE and CAR-T cells and tested their cytotoxicity in GBM cell cultures and mouse models of GBM. Fn14 was highly expressed in GBM tissues and cell lines, while it was undetectable in normal brain samples. Fn14× CD3 BiTE, Fn14 CAR-T cells and Fn14 CAR-T/IL-15 cells were antigen-specific and highly cytotoxic, showing good antitumor activity in vitro and causing significant regression of established solid tumors in xenograft models. However, the xenografts treated with Fn14 CAR-T cells regrew, whereas xenografts treated with Fn14 CAR-T/IL-15 cells did not. IL-15 engineering augmented the antitumor activity of Fn14 CAR-T cells and resulted in significant antitumor effects similar to those of Fn14× CD3 BiTE. Our results suggest that Fn14 is an appropriate target for GBM. Anti-Fn14 BiTE and Fn14-specific CAR-T/IL-15 cells may be exciting immunotherapeutic options for malignant brain cancer.
| S-EPMC8477963 | biostudies-literature
Project description:We performed RNA sequencing of the aortic valves of C57BL/6J (the wild type with chow diet), Ldlr-/- (1. with chow diet, 2. with WD), and Apoe-/- mice (1. with chow diet, 2. with WD) to compare the overall transcriptomic characteristics within genetic differences (wild type, Ldlr-/-, Apoe-/-) or in dietary differences (chow diet versus WD).
2022-08-22 | GSE205587 | GEO
Project description:Clinical trials of MSCs in the treatment of OA have been carried out and good results have been obtained. However, these data on the dose of transplanted cells, the number of transplants, the therapeutic effect especially cartilage regeneration and safety are incomplete. Therefore, we constructed a cynomolgus macaque model consistent with the pathogenesis of OA. We have also established clinical-grade human umbilical cord-derived mesenchymal stem cell line. We selected two cell doses (2.5*10e7 cells per knee and 5*10e6 cells per knee, respectively) to assess differences in treatment effects and to assess the systemic safety of MSC therapy. High-dose hUC-MSCs can regenerate cartilage, increase joint space, and improve bone condition by ultrasound and MRI scans. But low-dose hUC-MSCs simply prevented further deterioration of the joint
2024-05-01 | GSE250569 | GEO
Project description:Purpose: Excessive intake of a western diet (WD), characterized by high fat and sugary drinks, is hypothesized to contribute to the development of inflammatory bowel disease (IBD). Despite the identified clinical association, the molecular mechanisms through which dietary changes lead to IBD development remain unknown. Here, we generated a murine model of severe intestinal inflammation triggered by long-term WD consumption, which exhibited markedly elevated taste receptor TAS1R3 expression in inflamed bowel tissues. Thus, we hypothesized that nutrient-induced TAS1R3 modulation is central to regulating intestinal inflammation. We tested our hypothesis by analyzing changes in gene expression profiles and inflammatory cell infiltration in the inflamed bowel tissues of WD-fed Tas1r3-deficient mice. Methods: We carried out RNA-Seq of ileum tissue of wild-type (WT) and taste receptor Tas1r3 knockout (Tas1r3−/−) mice fed a normal diet (ND) or western diet (WD) for 10 weeks using Ion Proton System. Raw RNA-seq reads were split into individual samples based on barcodes and quality controlled using the FASTQC tool. The reads were analyzed with Partek Flow software (Partek, St. Louis, MI, USA) (http://www.partek.com/partekgs). The sequence reads that passed quality filters were analyzed at the transcript isoform level. Results: We confirmed that Tas1r3-deficient mice are protected from WD-induced intestinal inflammation. Consistent with little or no phenotypic change in the ND group, the gene expression profiles from the ND-fed Tas1r3−/− and WT mice were similar, whereas the ileal transcriptome profiles from the WD-fed Tas1r3−/− mice were readily distinguishable from those of WD-fed WT mice. Inflammatory cytokines such as Tnfα and Il1b were highly expressed in WD-fed WT mice, whereas Pparg, Tjp3, and Defa27 were highly expressed in WD-fed Tas1r3−/− mice. Importantly, we confirmed that the absence of TAS1R3 caused a significant reduction in the inflammatory response-related signaling pathway; GSEA plots also revealed that the mTOR signaling pathway was greatly suppressed. Most notably, the PPAR signaling pathway was significantly affected by TAS1R3 absence. GSEA confirmed that genes associated with the PPAR signaling pathway were significantly enriched in the set of DEGs between Tas1r3−/− and WT mice in the WD groups. Conclusion: Our data suggest that, due to its suppressive action on mTOR, TAS1R3 might function as an important regulator of the PPAR-γ signaling pathway in the intestinal tract.
2023-04-19 | GSE190059 | GEO
Project description:safety versus fear conditioning. Mice were trained with 4 unpaired (Safety) or paired (Fear) CS-US presentations over 3 days. Mice were killed by decapitation 4hrs after the last training session.
2008-11-28 | E-MEXP-1358 | biostudies-arrayexpress