LedipasvirHCV NS5A protein inhibitor CAS# 1256388-51-8 |
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Chemical structure
3D structure
| Cas No. | 1256388-51-8 | SDF | Download SDF |
| PubChem ID | 67505836 | Appearance | Powder |
| Formula | C49H54F2N8O6 | M.Wt | 889 |
| Type of Compound | N/A | Storage | Desiccate at -20°C |
| Synonyms | GS-5885 | ||
| Solubility | DMSO : 50 mg/mL (56.24 mM; Need ultrasonic) H2O : < 0.1 mg/mL (insoluble) | ||
| Chemical Name | methyl N-[(2S)-1-[(6S)-6-[5-[9,9-difluoro-7-[2-[(1S,2S,4R)-3-[(2S)-2-(methoxycarbonylamino)-3-methylbutanoyl]-3-azabicyclo[2.2.1]heptan-2-yl]-3H-benzimidazol-5-yl]fluoren-2-yl]-1H-imidazol-2-yl]-5-azaspiro[2.4]heptan-5-yl]-3-methyl-1-oxobutan-2-yl]carbamate | ||
| SMILES | CC(C)C(C(=O)N1CC2(CC2)CC1C3=NC=C(N3)C4=CC5=C(C=C4)C6=C(C5(F)F)C=C(C=C6)C7=CC8=C(C=C7)N=C(N8)C9C1CCC(C1)N9C(=O)C(C(C)C)NC(=O)OC)NC(=O)OC | ||
| Standard InChIKey | VRTWBAAJJOHBQU-KMWAZVGDSA-N | ||
| Standard InChI | InChI=1S/C49H54F2N8O6/c1-24(2)39(56-46(62)64-5)44(60)58-23-48(15-16-48)21-38(58)42-52-22-37(55-42)28-9-13-32-31-12-8-26(18-33(31)49(50,51)34(32)19-28)27-10-14-35-36(20-27)54-43(53-35)41-29-7-11-30(17-29)59(41)45(61)40(25(3)4)57-47(63)65-6/h8-10,12-14,18-20,22,24-25,29-30,38-41H,7,11,15-17,21,23H2,1-6H3,(H,52,55)(H,53,54)(H,56,62)(H,57,63)/t29-,30+,38-,39-,40-,41-/m0/s1 | ||
| General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months. Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it. |
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| About Packaging | 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial. 2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial. 3. Try to avoid loss or contamination during the experiment. |
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| Shipping Condition | Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request. | ||
| Description | Ledipasvir is an inhibitor of the hepatitis C virus NS5A, with EC50 values of 34 pM against GT1a and 4 pM against GT1b replicon.In Vitro:Ledipasvir has GT1a and 1b EC50 values of 31 and 4 pM, respectively, and protein-adjusted EC50 values of 210 pM (GT1a) and 27 pM (GT1b) and the intrinsic EC50 of 39 is 310 fM for GT1a and 40 fM for GT1b. Ledipasvir is highly protein-bound both in human serum and in the cell-culture medium (containing 10% BSA) of the replicon assay[1]. Ledipasvir exhibits an EC50 value of 141 nM against the JFH/3a-NS5A replicon[2].In Vivo:Ledipasvir is remarkable not only on the basis of its high replicon potency but also on the basis of its low clearance, good bioavailability, and long half-lives in rat, dog, and monkey and low predicted clearance in human. The pharmacokinetics of Ledipasvir is measured in rats and dogs. Ledipasvir shows good half-lives (rat 1.83 ± 0.22 hr, dog 2.63 ± 0.18 hr) in plasma, low systemic clearance (CL), and moderate volumes of distribution (Vss) that are greater than total body water volume[1]. References: | |||||
Ledipasvir Dilution Calculator
Ledipasvir Molarity Calculator
| 1 mg | 5 mg | 10 mg | 20 mg | 25 mg | |
| 1 mM | 1.1249 mL | 5.6243 mL | 11.2486 mL | 22.4972 mL | 28.1215 mL |
| 5 mM | 0.225 mL | 1.1249 mL | 2.2497 mL | 4.4994 mL | 5.6243 mL |
| 10 mM | 0.1125 mL | 0.5624 mL | 1.1249 mL | 2.2497 mL | 2.8121 mL |
| 50 mM | 0.0225 mL | 0.1125 mL | 0.225 mL | 0.4499 mL | 0.5624 mL |
| 100 mM | 0.0112 mL | 0.0562 mL | 0.1125 mL | 0.225 mL | 0.2812 mL |
| * Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations. | |||||
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Ledipasvir is an inhibitor of the hepatitis C virus replication with IC50 value of 141 nM [1].
Hepatitis C virus (HCV) is an enveloped (+)-single stranded RNA virus, which is the cause of hepatitis C and some cancer lymphomas. The viral RNA is replicated in host cell via RNA-dependent RNA polymerase of HIV and then assembled into virions. The zinc-binding phosphoprotein NS5A protein is translated from HCV genome, which plays important role in the virus replication process. It may act as an transcriptional activator for NS5A RNA replication system and also the mediator of virion assembly.
Ledipasvir is a specific inhibitor of HCV NS5A protein to inhibit HCV replication in the HCV subgenomic replicon system. NS5A replication complex inhibitors are novel antiviral factors for HCV treatment. Typically, these inhibitors have high efficiency and low viral resistance when compared to traditional HCV replication inhibitor targeted on NS3 helicase and NS5B RNA polymerasae. NS5A inhibitors are supposed to bind across the NS5A dimer interface, proximal to N-terminal domain 1. The binding is thought to distort dimer association directly or allosterically, which may disrupt NS5A function in HCV RNA replication [2]. When a JFH1/3a-NS5A hybrid replicon was used to assess susceptibility to NS5A, another inhibitor DCV was shown to be more potent than ledipasvir. Additionally, NS5A-A30K and -Y93H variants exhibited reduced sensitivity to ledpasvir (EC50 value of 1770 nM and 4300 nM respectively) [1].
In clinical trials, it was observed ledpasvir was well tolerated and exhibited median maximal reduction of HCV RNA ranging from 2.3 log10 IU/ml to 3.3 log10 IU/ml. Emax modeling also showed administration of 30 mg ledpasvir after 3 days resulted in >95% maximal response of HCV RNA reduction to genotype 1a.Finally, it was also observed that HCV RNA was more sustained in genotype 1b compared to 1a [3].
References:
[1] Hernandez D et al. , Natural prevalence of NS5A polymorphisms in subjects infected with hepatitis C virus genotype 3 and their effects on the antiviral activity of NS5A inhibitors. J Clin Virol. 2013, 57(1): 13-8.
[2] Gao M et al. , Chemical genetics strategy identifies an HCV NS5A inhibitor with a potent clinical effect. Nature. 2010, 465: 96-100.
[3] Lawitz E J et al. , A phase 1, randomized, placebo-controlled, 3-day, dose-ranging study of GS-5885, an NS5A inhibitor, in patients with genotype 1 hepatitis C. J Hepatol. 2012, 57(1): 24-31.
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The Efficacy and Safety of 12 Weeks of Sofosbuvir and Ledipasvir versus Sofosbuvir, Ledipasvir, and Ribavirin in Patients with Chronic Hepatitis C, Genotype 1, Who Have Cirrhosis and Have Failed Prior Therapy: A Systematic Review and Meta-Analysis.[Pubmed:28367429]
Can J Gastroenterol Hepatol. 2017;2017:6468309.
Background. The recommended therapy for patients with chronic hepatitis C (CHC), genotype 1, who have cirrhosis and have failed prior therapy is 12 weeks of sofosbuvir (SOF), Ledipasvir (LDV), and ribavirin (RBV). This recommendation is based on expert opinion, and the efficacy of 12 weeks of SOF/LDV compared to SOF/LDV/RBV in this patient population has not yet been established. Methods. We conducted a systematic review and meta-analysis. Two investigators independently searched electronic databases and relevant conference proceedings for randomized controlled trials comparing rates of sustained virologic response 12 weeks after therapy (SVR12) when using 12 weeks of SOF/LDV versus 12 weeks of SOF/LDV/RBV in patients with CHC, genotype 1, who have cirrhosis and failed previous therapy. Results. Our search strategy yielded 596 studies of which four met criteria for inclusion. The pooled RR of not achieving SVR12 with SOF/LDV versus SOF/LDV/RBV was 1.21 (95% CI: 0.42-3.48). Adverse events were lower in the SOF/LDV compared to the SOF/LDV/RBV arms (pooled RR: 0.11, 95% CI: 0.04-0.29). Conclusions. Our findings suggest that 12 weeks of SOF/LDV cannot be considered noninferior to 12 weeks of SOF/LDV/RBV to achieve SVR12 in patients with CHC who have cirrhosis and failed prior therapy.
Clinical evaluation of sofosbuvir/ledipasvir in patients with chronic hepatitis C genotype 1 with and without prior daclatasvir/asunaprevir therapy.[Pubmed:28332272]
Hepatol Res. 2017 Nov;47(12):1308-1316.
AIM: This study explored treatment outcomes of sofosbuvir (SOF)/Ledipasvir (LDV) therapy for chronic hepatitis C patients with and without prior daclatasvir (DCV)/asunaprevir (ASV) therapy. METHODS: Overall, 530 Japanese patients who were infected with hepatitis C virus genotype 1 received SOF/LDV therapy for 12 weeks, and resistance-associated variants (RAVs) in the hepatitis C virus non-structural protein (NS)5A and NS5B regions were assessed at baseline and virological relapse by direct sequencing. RESULTS: Sustained virological response (SVR) rates did not significantly differ between patients with and without NS5A Y93H/N (94.2% [113/120] vs. 97.7% [345/353]), but the SVR rate was significantly lower in patients with prior DCV/ASV therapy compared to those without (69.2% [18/26] vs. 98.4% [496/504], P < 0.001). Among 26 patients with prior DCV/ASV therapy, the prevalence of NS5A multi-RAVs (>/=2) was similar between responders and non-responders (61% [11/18] vs. 75% [5/8]), but all patients without RAVs achieved SVR. Multivariate analysis showed that prior DCV/ASV therapy and history of hepatocellular carcinoma were independently associated with treatment failure (odds ratio, 37.55; 95% confidence interval, 10.78-130.76; P < 0.001 for prior DCV/ASV therapy; odds ratio, 4.42; 95% confidence interval, 1.09-18.04; P = 0.03 for the history of HCC). All SOF/LDV failure patients (n = 8) with prior DCV/ASV treatment had two or more factors of cirrhosis, IL28B unfavorable genotype, and baseline NS5A multi-RAVs. The multiple NS5A RAVs had increased but NS5B substitutions, C316N/A207T/A218S or L159F, had not changed at the time of relapse. CONCLUSIONS: Prior DCV/ASV therapy is associated with failure of SOF/LDV therapy due to multiple RAVs.
Spectrophotometric Methods for Simultaneous Determination of Sofosbuvir and Ledipasvir (HARVONI Tablet): Comparative Study with Two Generic Products.[Pubmed:28330530]
J AOAC Int. 2017 Jul 1;100(4):976-984.
Sofosbuvir and Ledipasvir are the first drugs in a combination pill to treat chronic hepatitis C virus. Simple, sensitive, and rapid spectrophotometric methods are presented for the determination of sofosbuvir and Ledipasvir in their combined dosage form. These methods were based on direct measurement of Ledipasvir at 333 nm (due to the lack of interference of sofosbuvir) over a concentration range of 4.0-14.0 microg/mL, with a mean recovery of 100.78 +/- 0.64%. Sofosbuvir was determined, without prior separation, by third-derivative values at 281 nm; derivative ratio values at 265.8 nm utilizing 5.0 microg/mL Ledipasvir as a divisor; the ratio difference method using values at 270 and 250 nm using 5.0 microg/mL Ledipasvir as a divisor; and the ratio subtraction method using values at 261 nm. These methods were found to be linear for sofosbuvir over a concentration range of 5.0-35.0 microg/mL. The suggested methods were validated according to International Conference on Harmonization guidelines. Statistical analysis of the results showed no significant difference between the proposed methods and the manufacturer's LC method of determination with respect to accuracy and precision. These methods were used to compare the equivalence of an innovator drug dosage form and two generic drug dosage forms of the same strength.
Decreasing racial disparity with the combination of ledipasvir-sofosbuvir for the treatment of chronic hepatitis C.[Pubmed:28356778]
Hepat Med. 2017 Mar 16;9:13-16.
African Americans (AA) in the US are twice as likely to be infected with hepatitis C virus (HCV) compared to the non-Hispanic-white US population (Cau). They are also more likely to be infected with HCV genotype 1, more likely to develop hepatocellular carcinoma, and, in addition, have a lower response rate to interferon-based therapies. With the increase in response rates reported for combinations of direct-acting antivirals, the possibility that racial disparity would be eliminated by agents that directly inhibit virus replication has become a reality. The objective of this review is to evaluate the literature from clinical studies and retrospective analysis with respect to the response of AA to the most prescribed antiviral combination sofosbuvir plus Ledipasvir. While few studies have focused on AA patients, sufficient information is availed from the literature and studies in our predominately AA clinic population to confirm that Ledipasvir-sofosbuvir has a similar effectiveness in AA as compared to Cau.
