A new sensitive assay for pyrimidine nucleoside phosphorylase using non-radioactive substrates is described. With the natural substrate uridine (UR) and the analog, 5'-deoxy-5-fluorouridine (5'dFUR) conditions have been optimized to measure the product formation with reversed-phase high-performance liquid chromatography. Using automated injection large series of samples may be analyzed. The assay for UR phosphorylase appeared to be comparable to existing methods with radiolabeled UR as substrate regarding sensitivity and linearity. The assay has been used to measure kinetic parameters for 5'dFUR and UR in two cell lines from intestinal origin.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0009-8981(88)90270-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pyrimidinergic P2Y1-Like Nucleotide Receptors Are Functional in Rat Conjunctival Goblet Cells.
Invest Ophthalmol Vis Sci
January 2025
Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States.
Purpose: To investigate the presence of uridine-5'-triphosphate (UTP)-activated P2Y1-like nucleotide receptors (P2Y2R, P2Y4R, and P2Y6R) in conjunctival goblet cells (CGCs) and determine if they increase intracellular Ca2+ concentration ([Ca2+]i) and induce mucin secretion.
Methods: Adult, male rat conjunctiva was used for culture of CGCs. To investigate the expression of P2YRs, mRNA was extracted from CGCs and used for reverse transcription PCR (RT-PCR) with commercially obtained primers specific to P2Y2R, P2Y4R, and P2Y6R.
Background: Molnupiravir (MOV) is an orally bioavailable ribonucleoside with antiviral activity against all tested SARS-CoV-2 variants. We describe the demographic, clinical, and treatment characteristics of non-hospitalized Danish patients treated with MOV and their clinical outcomes following MOV initiation.
Method: Among all adults (>18 years) who received MOV between 16 December 2021 and 30 April 2022 in an outpatient setting in Denmark, we summarized their demographic and clinical characteristics at baseline and post-MOV outcomes using descriptive statistics.
The efficacy and safety of tyrosine kinase inhibitors in the treatment of advanced or metastatic chordoma: a single-arm meta-analysis.
Neurosurg Rev
January 2025
Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, 45# Changchun Street, Xicheng District, Beijing, China.
Chordoma is a rare malignant tumor with a higher incidence in males than in females. There is an increasing number of clinical studies related to tyrosine kinase inhibitors (TKIs), yet the efficacy and safety of different drugs vary. In this single-arm meta-analysis evaluating the efficacy and safety of TKIs for chordoma treatment, 12 studies involving 365 patients were analyzed.
View Article and Find Full Text PDFA cost-effectiveness analysis of sotorasib as second-line treatment for patients with KRAS-G12C-mutated metastatic non-small cell lung cancer (mNSCLC) in Switzerland.
Swiss Med Wkly
January 2025
Cancer Center und Research Center, Cantonal Hospital Graubünden, Chur, Switzerland.
Background And Objective: Because of the lack of effective targeted treatment options, docetaxel has long been the standard second-line therapy for patients with advanced non-small cell lung cancer, including the Kirsten rat sarcoma virus (KRAS) G12C mutation. The CodeBreak 200 trial demonstrated that sotorasib, a new drug targeting the G12C-mutated KRAS protein, modestly improved progression-free survival compared with docetaxel in patients whose cancer had progressed after receiving platinum chemotherapy and programmed cell death protein 1 (PD-1) / programmed death ligand 1 (PD-L1) inhibitors as first-line treatment. Consequently, sotorasib received temporary approval in Switzerland.
View Article and Find Full Text PDFMetabolomic Analysis of the Effects of Canagliflozin on HFpEF Rats and Its Underlying Mechanism.
Endocr Metab Immune Disord Drug Targets
January 2025
Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, China.
Background: Heart failure with preserved ejection fraction (HFpEF) represents a challenging cardiovascular condition characterized by normal systolic function but impaired diastolic performance. Despite its increasing prevalence, therapeutic options remain limited. This study investigated the metabolic effects of canagliflozin, a sodium-glucose cotransporter 2 (SGLT2) inhibitor, on cardiac function and energy metabolism in HFpEF.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!