| 名稱 | Glecaprevir |
| 描述 | Glecaprevir (ABT-493) is a small-molecule inhibitor that functions as an HCV NS3/4A protease inhibitor (IC50=3.5–11.3 nM) and also inhibits SARS-CoV-2 3CLpro (IC50=4.09 μM). It possesses oral bioavailability and antiviral activity, and is used for the treatment of hepatitis C as well as potential anti-coronavirus research. |
| 細(xì)胞實(shí)驗(yàn) | The activity of glecaprevir, paritaprevir, or grazoprevir against cells of nine cell lines each stably transfected with an HCV subgenomic replicon containing NS3 protease from a different HCV genotype was determined using a luciferase reporter assay as described previously. Five of these nine cell lines have been described previously, including those transfected with genotypes 1a H77, 1b Con1, 3a, 4a, and 6a. The other four cell lines were established by transfecting cells with a nonchimeric genotype 2a JFH-1 replicon, two genotype 2a JFH-1 chimeric replicons containing either a genotype 2b NS3 protease domain (N-terminal 251 amino acids) or a sequence encoding full-length NS3 through the first 39 amino acids of NS5B from genotype 5a (strain SA13), and one chimeric replicon with a genotype 1b Con1 backbone containing full-length NS3 and NS4A sequences from genotype 6e. The genotype 2b and 6e NS3 sequences were each synthetically constructed based on a consensus sequence derived from the alignment of 15 genotype 2b and 4 genotype 6e sequences, respectively. All replicon constructs were bicistronic subgenomic replicons similar to those described by Bartenschlager and coworkers, and the replicon cell lines were generated by introducing these constructs into cells of an Huh-7 human hepatoma-derived cell line. The inhibitory effect of the PIs on HCV replication in replicon cells was determined in Dulbecco's modified Eagle medium containing 5% fetal bovine serum with or without 40% human plasma. The EC50s were determined using nonlinear regression curve fitting as described previously [1]. |
| 激酶實(shí)驗(yàn) | Eight recombinant HCV NS3/4A proteases were generated for use in evaluating glecaprevir activity in a biochemical assay. Each recombinant protein contained the entire coding regions of NS3 (amino acids 1 to 631) and NS4A (amino acids 1 to 54) from HCV genotypes 1 to 6, a 6-histidine tag at the N terminus to facilitate purification by affinity chromatography, and three lysine residues at the C terminus to increase the solubility of the protein. Genes encoding NS3/4A were derived from laboratory strains 1a-H77 and 1b-N or from clinical samples from patients infected with genotype 2a, 2b, 3a, or 4a. All patients provided written informed consent. Clinical studies were designed according to Good Clinical Practice guidelines, the Declaration of Helsinki, and applicable local regulations, with independent ethics committee or institutional review board approval for all study sites. The genotype 5a NS3/4A gene sequence was synthetically constructed based on the sequence of the clinical isolate SA13, whereas the genotype 6a NS3/4A gene sequence was synthetically constructed based on a consensus sequence derived from the alignment of 15 genotype 6a sequences available in GenBank. The NS3/4A genes were each cloned into the protein expression vector pET14b, and a clone with an NS3/4A protease sequence that matched the consensus sequence for each sample was subsequently selected for protein expression and purification. Protease activity was measured by continuous monitoring of the fluorescence change associated with the cleavage of a fluorogenic depsipeptide (EDANS/DABCYL) substrate using a purified recombinant HCV NS3/4A protease as described previously. The IC50 for each HCV protease was determined in studies in which the protease was preincubated with glecaprevir for 30 min. The percent inhibition was calculated from the initial rates of the inhibited reactions relative to the rate for the uninhibited control [1]. |
| 體外活性 | 方法：通過(guò)生化法測(cè)定Glecaprevir對(duì)HCV NS3/4A蛋白酶的抑制活性，并在Huh-7細(xì)胞中檢測(cè)其對(duì)含不同基因型HCV蛋白酶的亞基因組復(fù)制子及臨床樣本復(fù)制子的抗病毒活性。結(jié)果：Glecaprevir可抑制HCV基因型1-6 NS3/4A蛋白酶，IC50值為3.5至11.3 nM；對(duì)含基因型1a、1b、2a、2b、3a、4a、5a、6a和6e蛋白酶的穩(wěn)定復(fù)制子有活性，EC50值為0.21至4.6 nM，其中對(duì)最難治的基因型3復(fù)制子EC50值為1.9 nM，活性優(yōu)于帕利瑞韋和格拉瑞韋；對(duì)含基因型1a、1b、2a、2b、3a、4a、4d和5a臨床樣本的復(fù)制子EC50中值為0.30 nM（范圍0.05-3.8 nM）。[1] |
| 體內(nèi)活性 | 方法：在健康志愿者和HCV感染者中，單次或多次口服Glecaprevir 300 mg（與Pibrentasvir聯(lián)用），檢測(cè)藥代動(dòng)力學(xué)參數(shù)。
結(jié)果：半衰期6-9小時(shí)，肝硬化患者暴露量約為無(wú)肝硬化者的2.2倍，終末期腎病患者暴露量增加86%。[2] |
| 存儲(chǔ)條件 | Powder: -20°C for 3 years | In solvent: -80°C for 1 year
Shipping with blue ice/Shipping at ambient temperature. |
| 溶解度 | DMSO : 130 mg/mL (154.97 mM), Sonication is recommended.
10% DMSO+40% PEG300+5% Tween 80+45% Saline : 4 mg/mL (4.77 mM), Sonication is recommended.
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| 關(guān)鍵字 | SARS-CoV | SARSCoV | SARS coronavirus | Inhibitor | inhibit | Hepatitis C virus | HCVProtease | HCV Protease | HCV NS3/4A protease | HCV | Glecaprevir | ABT493 | ABT 493 |
| 相關(guān)產(chǎn)品 | α-Cyclodextrin | Chloroquine phosphate | Dexamethasone | Hydroxychloroquine | Artemisinin | Methyl 2-amino-5-bromobenzoate | Deferiprone | Silymarin | Ritonavir | Ribavirin | Sofosbuvir | Molnupiravir |
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