half-life

Clevudine (Levovir) is a synthetic pyrimidine analogue with activity against hepatitis B virus (HBV). Intracellularly, clevudine is phosphorylated to its active metabolites, clevudine monophosphate and triphosphate. The triphosphate metabolite competes with thymidine for incorporation into viral DNA, thereby causing DNA chain termination and inhibiting the function of HBV DNA polymerase (reverse transcriptase). Clevudine has a long half-life and shows significant reduction of covalently closed circular DNA (cccDNA), therefore the patient is less likely to have a relapse after treatment is discontinued.

Didesmethyl cariprazine, a metabolite of Cariprazine, is the major cyclic active part. Didesmethyl cariprazine has a long half-life of 1-3 weeks. Cariprazine is a potent D3 preference D3 D2 receptor partial agonist of dopamine for the treatment of schizophrenia, bipolar mania, and depression, with a high affinity for d3 and d2 receptors and a moderate affinity for 5-HT 1A receptors.

PF-03635659 is a potent and long dissociative half-life muscarinic M3 antagonist (Ki: 0.2 nM) that shows potential for the treatment of chronic obstructive pulmonary disease (COPD).

GS-829845 is a JAK1 inhibitor, the main component of the active metabolite of Filgotinib, which is approximately 10-fold less potent and has a longer half-life than the parent.

Minamestane is a novel irreversible aromatase inhibitor.Minamestane induces time-dependent inhibition of human placental aromatase with a half-life of 4 minutes and a K of 59 nM.Minamestane has antitumor activity.

Secnidazole (PM-185184) is a second-generation 5-nitroimidazole antimicrobial that is structurally related to other 5-nitroimidazoles including [DB00916] and [DB00911], but displays improved oral absorption and longer terminal elimination half-life than antimicrobial agents in this class [A27210]. Secnidazole is selective against many anaerobic Gram-positive and Gram-negative bacteria and protozoa.

Ceftriaxone sodium hydrate is a broad-spectrum cephalosporin antibiotic with a very long half-life and high penetrability to meninges, eyes and inner ears.

Torsemide (AC-4464) is an anilinopyridine sulfonylurea belonging to the class of loop diuretics. Torsemide has a prolonged duration of action compared to other loop diuretics, is extensively protein bound in plasma and has a relatively long half-life.

(R)-5-Oxopyrrolidine-2-carboxylic acid (D-Pyroglutamic acid) is a cyclic derivative of glutamic acid, physiologically present in mammalian tissues. It releases GABA from the cerebral cortex and exhibits anti-anxiety effects in a simple approach-avoidance conflict situation in rats. In clinical pharmacology experiments, it significantly shortens the plasma half-life of ethanol during acute intoxication.

Aspoxicillin, a broad-spectrum antimicrobial agent, demonstrates efficacy against 68 isolates of Actinobacillus pleuropneumoniae, with a minimum inhibitory concentration (MIC90) of <= 0.05 μg ml. It exhibits a prolonged half-life of 55 minutes in mouse serum.

BPN-15606, an orally active γ-secretase modulator (GSM), significantly reduces Aβ42 and Aβ40 production in SHSY5Y neuroblastoma cells, demonstrating IC50 values of 7 nM and 17 nM, respectively. This compound exhibits favorable pharmacokinetic pharmacodynamic (PK PD) properties, such as bioavailability, half-life, and clearance. Importantly, BPN-15606 markedly decreases Aβ42 and Aβ40 levels in the central nervous system of both rats and mice[1].

Macitentan-d4 (ACT-064992 D4) is a deuterated substitute for Macitentan and can be used as a dual antagonist of the non-peptides ETA and ETB (endothelin receptor).Macitentan-d4 is less toxic than Macitentan, has a longer half-life, and can be used to study endothelin receptor-mediated diseases.

Cevimeline hydrochloride hemihydrate ((-)-SNI-2011), a novel muscarinic receptor agonist, is being explored as a potential treatment for xerostomia in Sjogren's syndrome, exhibiting an IC50 value indicative of its affinity for mAChR. This compound's pharmacological effects on the gastrointestinal, urinary, and reproductive systems, alongside its impact on various tissues, were thoroughly examined in species including mice, rats, guinea pigs, rabbits, and dogs. The metabolic breakdown of (-)-SNI-2011 was studied in vitro using rat and dog liver microsomes to assess its biotransformation. Upon oral administration, peak plasma concentrations were reached within an hour in both rats and dogs, showcasing rapid absorption and a subsequent decrease in concentration with a half-life ranging from 0.4 to 1.1 hours. Bioavailability was noted at 50% in rats and 30% in dogs. Metabolic pathways highlighted significant species differences, with both S- and N-oxidized metabolites identified in rats, but only N-oxidized metabolites in dogs. Additionally, gender differences in pharmacokinetics were observed in rats but were absent in dogs. In vitro studies pinpointed the involvement of cytochrome P450 (CYP) and flavin-containing monooxygenase (FMO) in the metabolism of (-)-SNI-2011, specifically through sulfoxidation and N-oxidation processes, respectively. CYP2D and CYP3A were identified as the primary enzymes responsible for sulfoxidation in rat liver microsomes.

(+)-Cevimeline hydrochloride hemihydrate ((+)-SNI-2011), a potent muscarinic receptor agonist, shows promise as a therapeutic candidate for xerostomia in Sjogren's syndrome. It exhibits a broad pharmacological profile across various systems in animal models including mice, rats, guinea pigs, rabbits, and dogs. Metabolism studies using rat and dog liver microsomes reveal rapid absorption with peak plasma concentrations (Cmax) within one hour post-oral administration and a half-life (t1 2) between 0.4 to 1.1 hours. Bioavailability is 50% in rats and 30% in dogs. Metabolic analysis shows species-specific differences: rats produce S- and N-oxidized metabolites, while dogs produce only N-oxidized metabolites. Sex-based pharmacokinetic differences were noted in rats but not in dogs. In vitro studies indicate cytochrome P450 (CYP) and flavin-containing monooxygenase (FMO) involvement in the sulfoxidation and N-oxidation of SNI-2011, with CYP2D and CYP3A mainly responsible for sulfoxidation in rat liver microsomes.

Fluorofenidone (AKF-PD) attenuates the progression of renal interstitial fibrosis partly by suppressing NADPH oxidase and extracellular matrix (ECM) deposition via the PI3K Akt signalling pathway. Fluorofenidone is an analogue of AMR69. Which displays equivalent lower toxicity, antifibrotic activity, and longer half-life.

Limaprost (17α,20-dimethyl-δ2-PGE1) is an analog of PGE1 with structural modifications intended to give it a prolonged half-life and greater potency.It is a potent and orally active vasodilator. Limaprost increases blood flow and inhibits platelet aggregation. Limaprost (17α,20-dimethyl-δ2-PGE1) can be used for pain relief, has antianginal effects, and has potential for ischaemic symptoms treatment.

FL442 is an Androgen Receptor (AR) modulator. This compound exhibits potent inhibitory effects in AR-dependent prostate cancer cells, showing similar suppression efficiency to the traditional antiandrogen drugs Bicalutamide and Enzalutamide. It also maintains antiandrogen activity against the Enzalutamide-resistant AR mutant F876L. The pharmacokinetic properties of FL442 in mice reveal a longer half-life (8 hours), excellent targeting (prostate tissue), and metabolic stability. Additionally, it is effective at inhibiting LNCaP tumor growth at low plasma concentrations (30 ng mL).

HIV-1inhibitor-75 is a human immunodeficiency virus 1 (HIV-1) inhibitor with an EC50 range of 0.0039-0.338 μM. Its target is the reverse transcriptase, exhibiting an IC50 value of 0.055 μM. Additionally, HIV-1inhibitor-75 demonstrates good metabolic stability in vitro, presenting moderate clearance rates and an extended half-life in human plasma and liver microsomes.

MerTK Axl-IN-1 (Compound A-910) is a potent and selective dual inhibitor of MerTK Axl, exhibiting IC50 values of 4.2 nM and 8.8 nM in Ba F3 cells, and 0.2 nM and 0.9 nM in HTRF cells, respectively. It effectively inhibits pMerTK in vivo and possesses a long half-life and high oral bioavailability.

Antifungal agent 114 (Compound 19g) serves as an inhibitor of Cytochrome P450 (Cytochrome P450), effectively suppressing CYP2C9, CYP2C19, CYP2D6, and CYP3A4 at 10 μM. It exhibits antifungal activity against Cryptococcus neoformans, Candida, and Aspergillus, with an MIC of less than 0.0625 μg mL. Additionally, Antifungal agent 114 demonstrates favorable metabolic stability in human liver microsomes with a half-life of 107 minutes.

RTI-122 is an effective GPR88 agonist with good metabolic stability (half-life of 5.8 hours in mice) and a cAMP EC50 of 11 nM. It can penetrate the blood-brain barrier and is utilized in research related to excessive drinking.

Cilastatin ammonium salt is an antibiotic that is particularly effective against Gram-positive cocci, with a half-life of 3-4 hours.

LU 2443 is an orally active antiepileptic agent that is extensively absorbed, with up to 18% remaining unabsorbed in rats. The active half-life in plasma is 13.17 hours.

(±)-Penbutolol ((Rac)-Penbutolol) is the racemic form of Penbutolol. It acts as an orally active β-adrenergic receptor antagonist. (±)-Penbutolol mitigates the tachycardia induced by exercise, reduces the increase in peak expiratory flow rate (PEFR) caused by physical activity, and decreases plasma renin activity (PRA) at rest. The peak plasma concentration of this compound is achieved one hour after oral administration, with a half-life of 4.5 hours, and it is metabolized into active metabolites in the body. This compound is utilized in research related to cardiovascular diseases.