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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
Osteosarcoma Cell Line U2os, supplied by ATCC, used in various techniques. Bioz Stars score: 99/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, <t>U2OS</t> cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.
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APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, U2OS cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.

Journal: Clinical Cancer Research

Article Title: A Novel Potent and Selective GCN2 Inhibitor, APL-4098, Has Antileukemic Activity through Dysregulation of Mitochondrial Function

doi: 10.1158/1078-0432.CCR-25-1444

Figure Lengend Snippet: APL-4098 is a potent inhibitor of GCN2. A, APL-4098 molecular structure. B, Crystal structure of APL-4098 bound to human GCN2. Backbone of the GCN2 catalytic site (blue ribbon) and binding of APL-4098, with the extensive interaction network in the ATP site shown with dashed red lines (hydrogen bonds) and yellow lines (hydrophobic contacts). C, Biochemical, ADME, and PK profile of APL-4098. *All data generated from a rat intravenous/oral study: 1 mg/kg i.v. and 3 mg/kg orally. 1 Data generated from the i.v. study and 2 data generated from the oral study. D, APL-4098 inhibition of GCN2 kinase activity, measured as the level of eIF2α phosphorylation, using LanthaScreen FRET-based assay. Plot shows mean ± SEM from three representative experiments conducted in duplicate. E, U2OS cells were treated with APL-4098 in the presence or absence of borrelidin as indicated for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from four individual experiments conducted in duplicate. F, U2OS cells were grown in glutamine-depleted medium and treated with APL-4098 as indicated for 4 hours. Cell lysates were analyzed by Western blotting.

Article Snippet: The osteosarcoma cell line U2OS (HTB-96, RRID: CVCL_0042) was obtained from ATCC and cultured in DMEM high glucose (Gibco, #41965-039) with 10% FBS (Gibco, #10270-106), 1 mmol/L sodium pyruvate (Gibco, #11360-039), 1% nonessential amino acids (Gibco, #11140-035), and antibiotics (penicillin/streptomycin 100 U/mL and 100 μg/mL; Gibco, #15140-122).

Techniques: Binding Assay, Generated, Inhibition, Activity Assay, Phospho-proteomics, HTRF Assay, Western Blot

APL-4098 is a selective inhibitor of GCN2. A, Eurofins KINOMEScan selectivity panel assay Treespot results for APL-4098 tested at 1 μmol/L. B, Eurofins biochemical K d concentration–response assay. C, U2OS cells were treated with APL-4098 or positive control dabrafenib (bioRxiv 2024.08.14.607626) in the presence of BtdCPU for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from three individual experiments conducted in duplicate. D, U2OS cells were treated with APL-4098 or positive control GSK2606414 in the presence of thapsigargin for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from three individual experiments.

Journal: Clinical Cancer Research

Article Title: A Novel Potent and Selective GCN2 Inhibitor, APL-4098, Has Antileukemic Activity through Dysregulation of Mitochondrial Function

doi: 10.1158/1078-0432.CCR-25-1444

Figure Lengend Snippet: APL-4098 is a selective inhibitor of GCN2. A, Eurofins KINOMEScan selectivity panel assay Treespot results for APL-4098 tested at 1 μmol/L. B, Eurofins biochemical K d concentration–response assay. C, U2OS cells were treated with APL-4098 or positive control dabrafenib (bioRxiv 2024.08.14.607626) in the presence of BtdCPU for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from three individual experiments conducted in duplicate. D, U2OS cells were treated with APL-4098 or positive control GSK2606414 in the presence of thapsigargin for 4 hours. Cell lysates were analyzed for phosphorylation of eIF2α using HTRF assay. Plot shows mean ± SEM from three individual experiments.

Article Snippet: The osteosarcoma cell line U2OS (HTB-96, RRID: CVCL_0042) was obtained from ATCC and cultured in DMEM high glucose (Gibco, #41965-039) with 10% FBS (Gibco, #10270-106), 1 mmol/L sodium pyruvate (Gibco, #11360-039), 1% nonessential amino acids (Gibco, #11140-035), and antibiotics (penicillin/streptomycin 100 U/mL and 100 μg/mL; Gibco, #15140-122).

Techniques: Concentration Assay, Positive Control, Phospho-proteomics, HTRF Assay