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PROTACs Targeting MLKL Protect Cells from Necroptosis
Rathje, Oliver H. ; Perryman, Lara ; Payne, Richard J. , et al. J. Med. Chem.,2023,66(16):11216-11236. DOI: 10.1021/acs.jmedchem.3c00665 PubMed ID: 37535857
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Abstract: Mixed Lineage Kinase domain-Like pseudokinase (MLKL) is implicated in a broad range of diseases due to its role as the ultimate effector of necroptosis and has therefore emerged as an attractive drug target. Here, we describe the development of PROteolysis TArgeting Chimeras (PROTACs) as a novel approach to knock down MLKL through chem. means. A series of candidate degraders were synthesized from a high-affinity pyrazole carboxamide-based MLKL ligand leading to the identification of a PROTAC mol. that effectively degraded MLKL and completely abrogated cell death in a TSZ model of necroptosis. By leveraging the innate ability of these PROTACs to degrade MLKL in a dose-dependent manner, the quant. relationship between MLKL levels and necroptosis was interrogated. This work demonstrates the feasibility of targeting MLKL using a PROTAC approach and provides a powerful tool to further our understanding of the role of MLKL within the necroptotic pathway.
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CAS No. : | 108466-89-3 | MDL No. : | MFCD17019374 |
Formula : | C11H21NO6 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | OMBVJVWVXRNDSL-UHFFFAOYSA-N |
M.W : | 263.29 | Pubchem ID : | 2755940 |
Synonyms : |
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Chemical Name : | 2,2-Dimethyl-4-oxo-3,8,11-trioxa-5-azatridecan-13-oic acid |
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | With dmap; dicyclohexyl-carbodiimide; In dichloromethane; at 0 - 20℃; for 16h;Inert atmosphere; | To a round bottom flask were added acid 33 (640 mg, 2.43 mmol), N- hydroxysuccinimide (419 mg, 3.64 mmol), DMAP (30 mg, 0.25 mmol), and 10 mL CH2CI2 under N2. The mixture was cooled down to 0 C and then a solution of DCC (752 mg, 3.64 mmol) in 10 mL CH2CI2 was added dropwise. The mixture was allowed to warm up to room temperature slowly overnight (16 h). Lots of white precipitates formed during the reaction. The precipitates were filtered off and the filtrate was washed with 20 mL 0.05 N HCl(aq) twice. The organic layer was dried with Na2S04 and concentrated under vacuum. The residue was dispersed in 20 mL EtOAc, and the insoluble precipitates were filtered off. The filtrate was concentrated to give T2 as a colorless oil (840 mg, 96%). NMR (400 MHz, CDCL): d 4.99 (s, 1H), 4.51 (s, 2H), 3.81-3.64 (m, 4H), 3.54 (t, J= 5.2 Hz, 2H), 3.32 (br q, J= 5.2 Hz, 2H), 2.86 (s, 4H), 1.44 (m, 9H). |
91% | With diisopropyl-carbodiimide; In tetrahydrofuran; at 20℃; for 2h; | Boc-AEEA-OH (26.4 g, 100 mmol) and HOSu (12.6 g, 110 mmol) were dissolved in 200 ml tetrahydrofuran. DIC (13.9 g, 110 mmol) was added dropwise under a condition of ice bath, and the reaction was continued at room temperature for 2 h after the dropwise addition. TLC showed that the reaction of the raw materials was completed. A vacuum concentration was performed, and the residue was recrystallized with EA to obtain 33.0 g of Boc-AEEA-OSu with yield: 91%, purity: 96.7%, MS: 361.4 (M+1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Synthesis of 8-tert-butyloxycarbonylamino-3,6-dioxaoctanoic acid (7) This compound was prepared in 83percent overall yield (4.3 g) as a thick yellow oil from 8-chloro-3,6-dioxaoctan-1-ol (3.35 g, 20.0 mmol) using Boc-carbonate (4.36 g, 20 mmol) in place of Fmoc-Cl in the procedure described above. 1H NMR (CDCl3) delta 4.18 (s, 2H), 4.2 (s, 2H), 3.34-3.77 (m, 8H), 1.5 (s, 9H). ESI-MS 264.1 (M+H+) (Calcd. 263.1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62.1% | With sodium carbonate; In 1,4-dioxane; water; at 20℃; for 12h; | Step 3a: To a stirred solution of compound 1a (5.0 g, 30.6 mmol) in 1,4-Dioxane (50 mL), Sodium carbonate (8.12 g, 76.5 mmol, dissolved in 10 mL water) and (Boc)2O (9.98 mL, 45.7 mmol) were added and stirred at room temperature for 12 h. The progress of reaction was monitored by TLC. The reaction mass was partitioned between diethyl ether and water. Then aqueous layer was made acidic (pH=3) by 3N HCl solution and was extracted with DCM (2×200 mL). Organic layer was washed with water, brine, dried over Na2SO4 and evaporated under reduced pressure to yield 50 g of pure 3a (Yield: 62.1%). LCMS: 263.0 (M+H)+ |
62.1% | With sodium carbonate; In 1,4-dioxane; water; at 20℃; for 12h; | To a stirred solution of compound la (5.0 g, 30.6 mmol) in 1,4-Dioxane (50 mL), Sodium carbonate (8.12 g, 76.5 mmol, dissolved in 10 mL water) and (Boc)20 (9.98 mL, 45.7 mmol) were added and stirred at room temperature for 12 h. The progress ofreaction was monitored by TLC. The reaction mass was partitioned between diethyl ether and water. Then aqueous layer was made acidic (pH = 3) by 3N HC1 solution and was extracted with DCM (2 x 200 mL). Organic layer was washed with water, brine, dried over Na2504 and evaporated under reduced pressure to yield 50 g of pure 3a (Yield:62.1%). LCMS: 263.0 (M+H). |
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