Atazanavir sulfate is a sulfate salt form of atazanavir that is an highly potent HIV-1 protease inhibitor.Target: HIV-1 protease inhibitorAtazanavir sulfate is a sulfate salt form of atazanavir that is an highly potent HIV-1 protease inhibitor. It has a pharmacokinetic profile that supports once-daily dosing and has demonstrated a unique resistance profile and superior virologic potency compared with other antiretrovirals in vitro. In subjects with HIV, atazanavir (400 mg once daily) produced rapid and sustained improvements in viral load and CD4 counts in both antiretroviral-naive as well as previously treated patients when used in combination with dual nucleoside reverse transcriptase inhibitor (NRTI) treatment [1].After intravenous (iv), oral (po) and intraportal (ip) administration of ATV at a dosage of 7 mg/kg, AUCs in HL rats were 12.41, 5.24 and 8.89 microg/mLh, respectively, and were significantly higher than those in control rats (4.09, 1.70 and 3.38 microg/mLh). Despite the decrease of distribution volume (Vd(ss)), the terminal half-life (t(1/2)) in HL tended to be shorter than in control, and hepatic distribution of ATV in HL rats was 4.8-fold increases. These results suggested that the uptake of ATV into liver might counteract the decrease of Vd(ss). On the other hand, there was no significant difference in bioavailability, and the lymphatic transport to AUC showed no statistical change. In conclusion, although the protein binding rate and AUC were significantly increased, the pharmacokinetics of ATV might be tolerated in HL [2].Clinical indications: HIV-1 infection Toxicity: torsades de pointes
HIV-1 protease-IN-2 is a potent HIV-1 protease inhibitor with an IC50 of 2.53 nM. HIV-1 protease-IN-2 shows antiviral activity against DRV (Darunavir)-sensitive or DRV-resistant HIV-1 variants[1].
Cytochalasin A is a cell-permeable fungal toxin that is an oxidized derivative of cytochalasin B. Cytochalasin A is an inhibitor of HIV-1 protease (IC50=3 μM) and inhibits actin polymerization and interferes with microtubule assembly by reacting with sulfhydryl groups. Antibiotic and fungicidal activitives[1][2].
Herpes virus inhibitor 2 is a herpes virus inhibitor and disrupts herpes virus ribonucleotide reductase quaternary structure. Herpes virus inhibitor 2 inhibits viral replication[1][2].
Amprenavir (Agenerase) is a HIV protease inhibitor(Ki=0.6 nM) used to treat HIV infection.IC50 Value: 0.6 nM (Ki); Against wild-type clinical HIV isolates:14.6 +/- 12.5 ng/mL (mean +/- SD) [1].Target: HIV proteasein vitro: Amprenavir has an enzyme inhibition constant (Ki = 0.6 nM) that falls within the Ki range of the other protease inhibitors. Amprenavir's in vitro 50% inhibitory concentration (IC50) against wild-type clinical HIV isolates is 14.6 +/- 12.5 ng/mL (mean +/- SD) [1]. Amprenavir had direct inhibitory effects on invasion of Huh-7 hepatocarcinoma cell lines, inhibiting MMP proteolytic activation [2].in vivo: Amprenavir was able to promote regression of hepatocarcinoma growth in vivo by anti-angiogenetic and overall anti-tumor activities, independently by PI3K/AKT related pathways that at today is one of the more suggestive hypothesis to explain the anti-tumor effects of the different protease inhibitors [2]. Amprenavir efficiently activated PXR and induced PXR target gene expression in vitro and in vivo. Short-term exposure to amprenavirsignificantly increased plasma total cholesterol and atherogenic low-density lipoprotein cholesterol levels in wild-type mice, but not in PXR-deficient mice [3]. Amprenavir has been approved for adults and children; the recommended capsule doses are 1200 mg twice daily for adults and 20 mg/kg twice daily or 15 mg/kg 3 times daily for children < 13 years of age or adolescents < 50 kg [1].Clinical trial: A Study to Compare Three Doses of T-20 When Given in Combination With Abacavir, Amprenavir, Ritonavir, and Efavirenz to HIV-Infected Adults. Phase 2
Tipranavir inhibits the enzymatic activity and dimerization of HIV-1 protease, exerts potent activity against multi-protease inhibitor (PI)-resistant HIV-1 isolates with IC50s of 66-410 nM.
Hinnuliquinone is a C2-symmetric dimeric non-peptide fungal metabolite inhibitor of HIV-1 protease. Hinnuliquinone is a bis-indolyl-2,5-dihydroxybenzoquinone pigment, that can be isolated from Nodulisphorium hinnuleum[1][2].
Lopinavir Metabolite M-1, an active metabolite of Lopinavir, inhibits HIV protease with a Ki of 0.7 pM. Lopinavir Metabolite M-1 has antiviral activities in vitro[1][2].
TMC310911 is a potent and orally active HIV type-1 (HIV-1) protease inhibitor with EC50 values ranged from 2.2 nM to 14.2 nM for wild-type HIV-1. TMC310911 has potent activity against a wide spectrum of recombinant HIV-1 isolates. TMC310911 has strong antiviral activity[1][2].
Indinavir sulfate(MK-639 sulfate; L735524 sulfate ) is a potent and specific HIV protease inhibitor that appears to have good oral bioavailability.Target: HIV ProteaseIndinavir(MK-639) is a protease inhibitor used as a component of highly active antiretroviral therapy (HAART) to treat HIV infection and AIDS.MK-639 appears to have significant dose-related antiviral activity and is well tolerated [1]. Inhibition constants (K(i)) of the antiviral drug indinavir for the reaction catalyzed by the mutant enzymes were about threefold and 50-fold higher for PR(L24I) and PR(I50V), respectively, relative to PR and PR(G73S). The dimer dissociation constant (K(d)) was estimated to be approximately 20 nM for both PR(L24I) and PR(I50V), and below 5 nM for PR(G73S) and PR. Crystal structures of the mutants PR(L24I), PR(I50V) and PR(G73S) were determined in complexes with indinavir, or the p2/NC substrate analog at resolutions of 1.10-1.50 Angstrom [2].
Darunavir(TMC114) is an HIV protease inhibitor.IC50 Value: Target: HIV ProteaseDarunavir HIV-1 antiviral structurally is similar to amprenavir and it is second generation HIV-1-protease inhibitor. Darunavir is a drug used to treat HIV infection. It is in the protease inhibitor class. Prezista is an OARAC recommended treatment option for treatment-naive and treatment-experienced adults and adolescents.
HIV-1 protease-IN-9 (compound 5b) is a HIV-1 protease inhibitor, with a Ki of 0.028 nM. HIV-1 protease-IN-9 shows potent antiviral activity, with an IC50 of 66.8 nM[1].
Arg-Val-(Nle-p-nitro)-Phe-Glu-Ala-Nle-NH2 is a fluorogenic substrate of HIV-1 protease. Arg-Val-(Nle-p-nitro)-Phe-Glu-Ala-Nle-NH2 can be used to test HIV-1 protease activity[1].
20(21)-Dehydrolucidenic acid A is a triterpenoid isolated from the fruiting body of the fungus Ganoderma sinense. 20(21)-Dehydrolucidenic acid A has weak anti-HIV-1 protease activity[1].
HIV Protease Substrate 1, a fiuorogenic HIV protease substrate, can be used to study enzymatic activity of HIV protease[1].
Brecanavir (GW640385) is a novel, potent HIV protease inhibitor.
CL-197 is an orally active and long-acting purine anti-HIV nucleoside reverse transcriptase inhibitor (NRTI). CL-197 has potential effect on the research of viral, oncological and cerebrovascular diseases[1].
Lopinavir-d8 (ABT-378-d8) is the deuterium labeled Lopinavir. Lopinavir (ABT-378) is a highly potent, selective peptidomimetic inhibitor of the HIV-1 protease, with Kis of 1.3 to 3.6 pM for wild-type and mutant HIV protease. Lopinavir acts by arresting maturation of HIV-1 thereby blocking its infectivity[1][2]. Lopinavir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 14.2 μM[3].
L-689502 is a potent inhibitor of HIV-l protease with an IC50 of 1 nM.
Saquinavir mesylate is an HIV Protease Inhibitor used in antiretroviral therapy. IC50 Value:Target: HIV ProteaseSaquinavir is a protease inhibitor. Proteases are enzymes that cleave protein molecules into smaller fragments. HIV protease is vital for both viral replication within the cell and release of mature viral particles from an infected cell. Saquinavir binds to the active site of the viral protease and prevents cleavage of viral polyproteins, preventing maturation of the virus. Saquinavir inhibits both HIV-1 and HIV-2 proteases.Studies have also looked at Saquinavir as a possible anti-cancer agent.
JE-2147 (AG1776) is a potent dipeptide protease inhibitor with a Ki of 0.33 nM for HIV-1 protease. JE-2147 has effective activities against a wide spectrum of HIV-1, HIV-2, simian immunodeficiency virus, and various clinical HIV-1 strains in vitro[1][2].
DPC-681 is a potent and selective inhibitor of HIV protease with IC90s for wild-type HIV-1 of 4 to 40 nM.IC50 value: 4 - 40 nM [1]Target: HIV proteasein vitro: DPC 681 is extremely potent inhibitor of wild-type HIV-1. When all of the HIV-1 strains tested are considered, the average concentrations required for 90% inhibition of replication were 7.3 ± 3.4 for DPC 681. DPC 681 shows no loss in potency toward recombinant mutant HIVs with the D30N mutation and a fivefold or smaller loss in potency toward mutant variants with three to five amino acid substitutions. [1]in vivo: The total body clearance (CL) of DPC 681 in dogs was high (1.8 liter/h/kg) equaling hepatic blood flow for this species (1.8 liter/h/kg). After an oral dosing, the Cmax increased ninefold between the 10- and 30-mg/kg DPC 681 dose groups. Bioavailability also increased between the 10- and 30-mg/kg dose groups (18.3 and 78.1%, respectively). These data suggest that hepatic extraction (first-pass effect) can be saturated in the dog. [1]
HIV Protease Substrate IV is a substrate of HIV protease. HIV Protease Substrate IV can be used to measure the activity of HIV (human immunodeficiency virus) -1 protease[1].
Nelfinavir(AG-1341) is a potent and orally bioavailable human immunodeficiency virus HIV-1 protease inhibitor (Ki=2 nM) and is widely prescribed in combination with HIV reverse transcriptase inhibitors for the treatment of HIV infection. IC50 Valur: 2 nM (Ki for HIV-1 protease) [2]Target: HIV Proteasein vitro: In vitro exposure (72 hours) of HAECs to NEL (0.25-2 μg/mL) decreased both basal (2.5-fold) and insulin-induced NO production (4- to 5-fold). NEL suppressed insulin-induced phosphorylation of both Akt and eNOS at serine residues 473 and 1177, respectively. NEL decreased tyrosine phosphorylation of IR-β, IRS-1, and PI3K. Coexposure to troglitazone (TRO; 250 nM) ameliorated the suppressive effects of NEL on insulin signaling and NO production. Coexposure to TRO also increased eNOS expression in NEL-treated HAECs [1]. AG1343 is a potent enzyme inhibitor (Ki = 2 nM) and antiviral agent (HIV-1 ED50 = 14 nM). An X-ray cocrystal structure of the enzyme-AG1343 complex reveals how the novel thiophenyl ether and phenol-amide substituents of the inhibitor interact with the S1 and S2 subsites of HIV-1 protease, respectively [2].in vivo: In vivo studies indicate that AG1343 is well absorbed orally in a variety of species and possesses favorable pharmacokinetic properties in humans [2].
Ac-Ser-Gln-Asn-Tyr-Pro-Val-Val-NH2 is a substrato peptídico of HIV-1 protease.Ac-Ser-Gln-Asn-Tyr-Pro-Val-Val-NH2 acts as the variable substrate in a peptidolytic assay to quantify the inhibition of the protease[1][2].
Ganoderic acid B is a triterpene isolated from a mushroom Ganoderma lucidum. Ganoderic acid B inhibits the activation of Epstein-Barr virus (EBV) antigens as telomerase inhibitor. Ganoderic acid B is a moderately active inhibitor against HIV-1 protease[1][2][3].
Saquinavir-d9 (Ro 31-8959-d9) is the deuterium labeled Saquinavir. Saquinavir(Ro 31-8959) is an HIV Protease inhibitor used in antiretroviral therapy. Saquinavir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 1.36 μM[1][2].
PNU-103017 is an HIV protease inhibitor.
Escin IA is a triterpene saponin isolated from horse chestnut, which inhibits HIV-1 protease with IC50 values of 35 μM. Escin IA has anti-TNBC metastasis activity, and its action mechanisms involved inhibition of epithelial-mesenchymal transition process by down-regulating LOXL2 expression[1][2].
Pepstatin (Pepstatin A) acetate is a specific, orally active aspartic protease inhibitor produced by actinomycetes, with IC50s of 4.5 nM, 6.2 nM, 150 nM, 290 nM, 520 nM and 260 nM for hemoglobin-pepsin, hemoglobin-proctase, casein-pepsin, casein-proctase, casein-acid protease and hemoglobin-acid protease, respectively. Pepstatin acetate also inhibits HIV protease[1][2].