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Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [RNA-Seq]

ABSTRACT: Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [RNA-Seq]

PROVIDER: PRJNA941879 | ENA |

REPOSITORIES: ENA

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Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [RNA-Seq]

Project description:Metabolic alterations in cancers precipitate in associated dependencies that can be therapeutically exploited. To meet this goal, natural product inspired small molecules can provide a resource of underexplored chemotypes. Here, we identify W7, a synthetic withanolide analog with pronounced anti-leukemic properties via orthogonal chemical screening. Through multi-omics profiling and genome-scale CRISPR/Cas9 screens, we identify that W7 disrupts Golgi homeostasis via a mechanism that requires active PI4P signaling at the ER-Golgi membrane interface. Thermal proteome profiling and genetic validation studies reveal the oxysterol-binding protein OSBP as the direct and phenotypically relevant target of W7. Collectively, these data reaffirm sterol transport as a therapeutically actionable dependency in leukemia and motivate ensuing translational investigation via the probe-like compound W7.

2023-03-15 | GSE226847 | GEO

Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [CRISPR screen]

2023-03-15 | GSE226848 | GEO

Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [CRISPR screen]

Project description:Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP [CRISPR screen]

| PRJNA941878 | ENA

Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP (TPP)

Project description:Metabolic alterations in cancers precipitate in associated dependencies that can be therapeutically exploited. To meet this goal, natural product inspired small molecules can provide a resource of underexplored chemotypes. We identify W7, a synthetic withanolide analog with pronounced anti-leukemic properties via orthogonal chemical screening. Through multi-omics profiling (including expression proteomics) and genome-scale CRISPR/Cas9 screens, we identify that W7 disrupts Golgi homeostasis via a mechanism that requires active PI4P signaling at the ER-Golgi membrane interface. Thermal proteome profiling and genetic validation studies reveal the oxysterol-binding protein OSBP as the direct and phenotypically relevant target of W7. Collectively, our data reaffirms sterol transport as a therapeutically actionable dependency in leukemia and motivate ensuing translational investigation via the probe-like compound W7.

2024-06-27 | PXD040692 | Pride

Withanolide analogues disrupt a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP (Expression proteomics)

Project description:Metabolic alterations in cancers precipitate in associated dependencies that can be therapeutically exploited. To meet this goal, natural product inspired small molecules can provide a resource of underexplored chemotypes. We identify W7, a synthetic withanolide analog with pronounced anti-leukemic properties via orthogonal chemical screening. Through multi-omics profiling (including expression proteomics) and genome-scale CRISPR/Cas9 screens, we identify that W7 disrupts Golgi homeostasis via a mechanism that requires active PI4P signaling at the ER-Golgi membrane interface. Thermal proteome profiling and genetic validation studies reveal the oxysterol-binding protein OSBP as the direct and phenotypically relevant target of W7. Collectively, our data reaffirms sterol transport as a therapeutically actionable dependency in leukemia and motivate ensuing translational investigation via the probe-like compound W7.

2024-06-27 | PXD040694 | Pride

Orpinolide disrupts a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP

Project description:Metabolic alterations in cancer precipitate in associated dependencies that can be therapeutically exploited. To meet this goal, natural product inspired small molecules can provide a resource of invaluable chemotypes. Here, we identify orpinolide, a synthetic withanolide analog with pronounced anti-leukemic properties via orthogonal chemical screening. Through multi-omics profiling and genome-scale CRISPR/Cas9 screens, we identify that orpinolide disrupts Golgi homeostasis via a mechanism that requires active phosphatidylinositol 4-phosphate (PI4P) signaling at the endoplasmic reticulum (ER)-Golgi membrane interface. Thermal proteome profiling and genetic validation studies reveal the oxysterol-binding protein OSBP as the direct and phenotypically relevant target of orpinolide. Collectively, these data reaffirm sterol transport as a therapeutically actionable dependency in leukemia and motivate ensuing translational investigation via the probe-like compound orpinolide.

2023-03-15 | GSE226849 | GEO

Orpinolide disrupts a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP

Project description:Orpinolide disrupts a leukemic dependency on cholesterol transport by inhibiting the oxysterol-binding protein OSBP

| PRJNA941873 | ENA

The response to lipopolysaccharide (LPS) of bone marrow derived macrophages treated with oxysterol binding protein (OSBP) inhibitors

Project description:The response to lipopolysaccharide (LPS) of bone marrow derived macrophages treated with oxysterol binding protein (OSBP) inhibitors

| PRJNA828534 | ENA

Structure-Activity Relationships of Ligand Binding to Oxysterol-Binding Protein (OSBP) and OSBP-Related Protein 4.

Project description:Oxysterol-binding protein (OSBP) and OSBP-related protein 4 (ORP4) have emerged as potentially druggable targets in antiviral and precision cancer drug development. Multiple structurally diverse small molecules function through targeting the OSBP/ORP family of proteins, including the antiviral steroidal compounds OSW-1 and T-00127-HEV2. Here, the structure-activity relationships of oxysterols and related compound binding to human OSBP and ORP4 are characterized. Oxysterols with hydroxylation at various side chain positions (i.e., C-20, C-24, C-25, and C-27)─but not C-22─confer high affinity interactions with OSBP and ORP4. A library of 20(S)-hydroxycholesterol analogues with varying sterol side chains reveal that side chain length modifications are not well tolerated for OSBP and ORP4 interactions. This side chain requirement is contradicted by the high affinity binding of T-00127-HEV2, a steroidal compound lacking the side chain. The binding results, in combination with docking studies using homology models of OSBP and ORP4, suggest multiple modes of steroidal ligand binding to OSBP and ORP4.

| S-EPMC10786236 | biostudies-literature

Global effects of pharmacologic inhibition of OSBP in human umbilical vein endothelial cells

Project description:We investigate how the pharmaceutical inhibtion of OSBP with SWG or OSW1 affected the macromolecule profile of human umbilical vein endothelial cells by transcriptomic and lipidomic profiling

2023-03-20 | GSE227667 | GEO

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