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Showing 1 to 12 of 16 entries
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The role of urate and xanthine oxidase in vascular oxidative stress: future directions.

Therapeutics and clinical risk management

George J, Struthers A.
PMID: 19851527
Ther Clin Risk Manag. 2009;5:799-803. doi: 10.2147/tcrm.s5701. Epub 2009 Oct 12.

Vascular oxidative stress has been shown to be a potent factor in the pathophysiology of endothelial dysfunction. Despite current optimal evidence-based therapy, mortality from various cardiovascular disorders remains high. The search for newer, novel ways of attenuating endothelial dysfunction...

Simultaneous analysis of allopurinol and oxypurinol using a validated liquid chromatography-tandem mass spectrometry method in human plasma.

Journal of pharmaceutical analysis

Rathod DM, Patel KR, Mistri HN, Jangid AG, Shrivastav PS, Sanyal M.
PMID: 29404018
J Pharm Anal. 2017 Feb;7(1):56-62. doi: 10.1016/j.jpha.2016.05.005. Epub 2016 May 26.

The present study describes a simple, reliable and reproducible liquid chromatography-tandem mass spectrometry method (LC-MS/MS) for the simultaneous determination of allopurinol and its active metabolite, oxypurinol in human plasma for a pharmacokinetic/bioequivalence study. After protein precipitation (PPT) of 100...

Reduction of Leukocyte Microvascular Adherence and Preservation of Blood-Brain Barrier Function by Superoxide-Lowering Therapies in a Piglet Model of Neonatal Asphyxia.

Frontiers in neurology

Ruden JB, Quick KL, Gonzales ER, Shah AR, Park TS, Kennedy N, Dugan LL, Gidday JM.
PMID: 31118919
Front Neurol. 2019 May 01;10:447. doi: 10.3389/fneur.2019.00447. eCollection 2019.

No abstract available.

Oxypurinol pharmacokinetics and pharmacodynamics in healthy volunteers: Influence of BCRP Q141K polymorphism and patient characteristics.

Clinical and translational science

Vora B, Brackman DJ, Zou L, Garcia-Cremades M, Sirota M, Savic RM, Giacomini KM.
PMID: 33931953
Clin Transl Sci. 2021 Jul;14(4):1431-1443. doi: 10.1111/cts.12992. Epub 2021 May 01.

The missense variant, breast cancer resistance protein (BCRP) p.Q141K, which encodes a reduced function BCRP, has been linked to poor response to allopurinol. Using a multifaceted approach, we aimed to characterize the relationship(s) between BCRP p.Q141K, the pharmacokinetics (PK)...

Pharmacokinetic/Pharmacodynamic Modelling of Allopurinol, its Active Metabolite Oxypurinol, and Biomarkers Hypoxanthine, Xanthine and Uric Acid in Hypoxic-Ischemic Encephalopathy Neonates.

Clinical pharmacokinetics

Chu WY, Annink KV, Nijstad AL, Maiwald CA, Schroth M, Bakkali LE, van Bel F, Benders MJNL, van Weissenbruch MM, Hagen A, Franz AR, Dorlo TPC, Allegaert K, Huitema ADR.
PMID: 34617261
Clin Pharmacokinet. 2021 Oct 07; doi: 10.1007/s40262-021-01068-0. Epub 2021 Oct 07.

BACKGROUND: Allopurinol, an xanthine oxidase (XO) inhibitor, is a promising intervention that may provide neuroprotection for neonates with hypoxic-ischemic encephalopathy (HIE). Currently, a double-blind, placebo-controlled study (ALBINO, NCT03162653) is investigating the neuroprotective effect of allopurinol in HIE neonates.OBJECTIVE: The...

Nuclear Magnetic Resonance Metabolomics Biomarkers for Identifying High Risk Patients with Extranodal Extension in Oral Squamous Cell Carcinoma.

Journal of clinical medicine

Tsai CK, Lin CY, Kang CJ, Liao CT, Wang WL, Chiang MH, Yen TC, Lin G.
PMID: 32235493
J Clin Med. 2020 Mar 30;9(4). doi: 10.3390/jcm9040951.

Extranodal extension (ENE) is an independent adverse prognostic factor in oral squamous cell carcinoma (OSCC), and is difficult to identify preoperatively. We aimed to discover biomarkers for high risk patients with ENE. Tandem tissue, plasma, and urine samples of...

Maternal-to-fetal allopurinol transfer and xanthine oxidase suppression in the late gestation pregnant rat.

Physiological reports

Kane AD, Camm EJ, Richter HG, Lusby C, Tijsseling D, Kaandorp JJ, Derks JB, Ozanne SE, Giussani DA.
PMID: 24400158
Physiol Rep. 2013 Nov;1(6):e00156. doi: 10.1002/phy2.156. Epub 2013 Nov 13.

Fetal brain hypoxic injury remains a concern in high-risk delivery. There is significant clinical interest in agents that may diminish neuronal damage during birth asphyxia, such as in allopurinol, an inhibitor of the prooxidant enzyme xanthine oxidase. Here, we...

Pharmacodynamic and pharmacokinetic effects and safety of verinurad in combination with allopurinol in adults with gout: a phase IIa, open-label study.

RMD open

Fleischmann R, Winkle P, Miner JN, Yan X, Hicks L, Valdez S, Hall J, Liu S, Shen Z, Gillen M, Hernandez-Illas M.
PMID: 29531784
RMD Open. 2018 Feb 08;4(1):e000584. doi: 10.1136/rmdopen-2017-000584. eCollection 2018.

OBJECTIVES: Verinurad (RDEA3170) is a high affinity, selective uric acid transporter (URAT1) inhibitor indevelopment for treating gout and asymptomatic hyperuricaemia. This phase IIa study evaluated the pharmacodynamics, pharmacokinetics and safety of verinurad combined with allopurinol versus allopurinol alone in...

Febuxostat improves outcome in a rat model of cancer cachexia.

Journal of cachexia, sarcopenia and muscle

Konishi M, Pelgrim L, Tschirner A, Baumgarten A, von Haehling S, Palus S, Doehner W, Anker SD, Springer J.
PMID: 26136193
J Cachexia Sarcopenia Muscle. 2015 Jun;6(2):174-80. doi: 10.1002/jcsm.12017. Epub 2015 Apr 21.

BACKGROUND: Activity of xanthine oxidase is induced in cancer cachexia, and its inhibition by allopurinol or oxypurinol improves survival and reduces wasting in the Yoshida hepatoma cancer cachexia model. Here, we tested the effects of the second-generation xanthine oxidase...

Acute Effects of Oral Tofisopam on Plasma Concentration and Urinary Excretion of Uric Acid and Oxypurinol "Preliminary Communication".

Current clinical pharmacology

Hatayama M, Sumida C, Kurajoh M, Shiraishi J, Okazaki H, Shoji T, Koyama H, Tsutsumi Z, Moriwaki Y, Namba M, Yamamoto T.
PMID: 25619490
Curr Clin Pharmacol. 2015;10(2):160-164. doi: 10.2174/1574884710666150126143421.

The effects of tofisopam, a GABA-receptor agonist, following oral administration (300mg) with and without allopurinol pretreatment on the plasma concentration and renal transport of uric acid and oxypurinol were investigated in 5 healthy subjects. Fractional and urinary excretions of...

Mechanism for the increased permeability in endothelial monolayers induced by elastase.

Mediators of inflammation

Suzuki N, Ishii Y, Kitamura S.
PMID: 18472917
Mediators Inflamm. 1994;3(1):11-6. doi: 10.1155/S0962935194000025.

The aim of this study was to investigate the mechanism for the increase in endothelial permeability induced by human neutrophil elastase (HNE). Pretreatment of bovine pulmonary artery endothelial cells (BPAEC) with HNE(0-30 mug/ml) for 1 h produced a concentration...

The effects of the xanthine oxidase inhibitors, allopurinol and oxypurinol on the pattern of purine release from hypoxic rat cerebral cortex.

Neurochemistry international

O'Regan MH, Phillis JW, Walter GA.
PMID: 20504405
Neurochem Int. 1989;14(1):91-9. doi: 10.1016/0197-0186(89)90015-6.

Release of purines from the normoxic and hypoxic/ischemic rat cerebral cortex was studied with the cortical cup technique. Both allopurinol (100 mg/kg, i.v.) and its active metabolite oxypurinol (20 mg/kg, i.v.) reduced the release of uric acid to 10%...

Showing 1 to 12 of 16 entries