Journal: J Med Chem / Year: 2022 Title: Overcoming Preclinical Safety Obstacles to Discover ()--((1,2,3,5,6,7-Hexahydro--indacen-4-yl)carbamoyl)-6-(methylamino)-6,7-dihydro-5-pyrazolo[5,1-][1,3]oxazine-3-sulfonamide (GDC-2394): A ...Title: Overcoming Preclinical Safety Obstacles to Discover ()--((1,2,3,5,6,7-Hexahydro--indacen-4-yl)carbamoyl)-6-(methylamino)-6,7-dihydro-5-pyrazolo[5,1-][1,3]oxazine-3-sulfonamide (GDC-2394): A Potent and Selective NLRP3 Inhibitor. Authors: Christopher McBride / Lynnie Trzoss / Davide Povero / Milos Lazic / Geza Ambrus-Aikelin / Angelina Santini / Rama Pranadinata / Gretchen Bain / Ryan Stansfield / Jeffrey A Stafford / James ...Authors: Christopher McBride / Lynnie Trzoss / Davide Povero / Milos Lazic / Geza Ambrus-Aikelin / Angelina Santini / Rama Pranadinata / Gretchen Bain / Ryan Stansfield / Jeffrey A Stafford / James Veal / Ryan Takahashi / Justin Ly / Shu Chen / Liling Liu / Marika Nespi / Robert Blake / Arna Katewa / Tracy Kleinheinz / Swathi Sujatha-Bhaskar / Nandhini Ramamoorthi / Jessica Sims / Brent McKenzie / Mark Chen / Mark Ultsch / Matthew Johnson / Jeremy Murray / Claudio Ciferri / Steven T Staben / Michael J Townsend / Craig E Stivala / Abstract: Inappropriate activation of the NLRP3 inflammasome has been implicated in multiple inflammatory and autoimmune diseases. Herein, we aimed to develop novel NLRP3 inhibitors that could minimize the ...Inappropriate activation of the NLRP3 inflammasome has been implicated in multiple inflammatory and autoimmune diseases. Herein, we aimed to develop novel NLRP3 inhibitors that could minimize the risk of drug-induced liver injury. Lipophilic ligand efficiency was used as a guiding metric to identify a series of 6,7-dihydro-5H-pyrazolo[5,1-][1,3]oxazinesulfonylureas. A leading compound from this series was advanced into safety studies in cynomolgus monkeys, and renal toxicity, due to compound precipitation, was observed. To overcome this obstacle, we focused on improving the solubility of our compounds, specifically by introducing basic amine substituents into the scaffold. This led to the identification of GDC-2394, a potent and selective NLRP3 inhibitor, with an in vitro and in vivo safety profile suitable for advancement into human clinical trials.
Model: Quantifoil R1.2/1.3 / Material: GOLD / Support film - Material: GOLD / Support film - topology: HOLEY / Support film - Film thickness: 25 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. / Pretreatment - Pressure: 0.007 kPa Details: Holey gold grids (UltrAuFoil 25 nm R 1.2/1.3) were glow discharged for 20 seconds using a Solarus plasma cleaner (Gatan, Pleasanton, CA, USA), and grids were blotted and plunge frozen in ...Details: Holey gold grids (UltrAuFoil 25 nm R 1.2/1.3) were glow discharged for 20 seconds using a Solarus plasma cleaner (Gatan, Pleasanton, CA, USA), and grids were blotted and plunge frozen in liquid ethane using a Vitrobot (ThermoFisher Scientific, Waltham, MA), operating at 4C, 100 relative humidity, blot force 7, and with a 4 second blot time.
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK III
Details
mono disperse
-
Electron microscopy
Microscope
FEI TITAN KRIOS
Software
Name: SerialEM
Image recording
Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average exposure time: 3.0 sec. / Average electron dose: 64.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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