Nitric oxide (NO) is synthesized from arginine (ARG) by NO synthase (NOS). Asymmetric dimethylarginine (ADMA), a competitive inhibitor of NOS, participates in the endogenous regulation of NO synthesis. The main amount of ADMA is enzymatically degraded by dimethylarginine dimethylaminohydrolase (DDAH) widely expressed in renal tissue. The aim of our study was to compare the changes in DDAH activity and ARG synthesis in kidneys, ADMA and ARG concentration in plasma and their urinary excretion under physiological conditions and in acute renal injury (ARI) induced by glycerol in rats. Urinary nitrite/nitrate excretion (NOx) was estimated as an indicator of whole-body NO synthesis. DDAH activity was decreased, ADMA excretion was increased and plasma ADMA did not change in ARI. Plasma ARG concentration, renal ARG synthesis and urinary NOx excretion were decreased. In conclusion, the diminished enzymatic hydrolysis of the NOS inhibitor ADMA and the reduced synthesis of the NOS substrate ARG might affect NO production in ARI.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
The Association of Plasma Asymmetric Dimethylarginine Concentrations and Inflammation Markers in Non-small Cell Lung Cancer.
Sisli Etfal Hastan Tip Bul
December 2024
Department of Radiation Oncology, University of Health Sciences Türkiye, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Türkiye.
Objectives: Nonsmall cell lung cancer (NSCLC) accounts for about 85% of all lung cancers. Asymmetric dimethylarginine (ADMA) is an emerging molecule that is highlighted in carcinogenesis and tumor progression in lung cancer. Since elevated concentrations of ADMA are observed in lung cancer patients, we aimed to explore its associations with inflammation markers and established prognostic indices.
View Article and Find Full Text PDFNighttime systolic blood pressure a major factor of retinal vascular caliber changes in patients with newly diagnosed type 2 diabetes mellitus.
Am J Hypertens
January 2025
3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Greece.
Background: Changes in retinal vessel caliber are crucial for detecting early retinopathy, a significant cause of blindness in individuals with Diabetes Mellitus type 2 (T2DM). This study aims to evaluate the changes in retinal vessel caliber and identify factors associated with these changes in recently diagnosed T2DM patients.
Methods: The study included newly diagnosed T2DM patients (within 6 months of diagnosis) who were free of antidiabetic treatment (except metformin) and matched individuals based on age and blood pressure (BP).
Aqueous Proteomic and Metabolomic Profiles in Low-Energy vs High-Energy Femtosecond Laser-Assisted Cataract Surgery.
Invest Ophthalmol Vis Sci
January 2025
Singapore Eye Research Institute, Singapore.
Purpose: To investigate the aqueous proteomics and metabolomics in low-energy and high-energy femtosecond laser-assisted cataract surgery (FLACS).
Methods: In this prospective observational study, 72 patients were randomized to 3 groups: low-energy FLACS, high-energy FLACS, and conventional phacoemulsification (controls). Aqueous was collected after femtosecond laser treatment or at the beginning of surgery (controls).
Kallistatin as a Potential Marker of Therapeutic Response During Alpha-Lipoic Acid Treatment in Diabetic Patients with Sensorimotor Polyneuropathy.
Int J Mol Sci
December 2024
Division of Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary.
Diabetic sensorimotor neuropathy (DSPN) is strongly associated with the extent of cellular oxidative stress and endothelial dysfunction in type 2 diabetes (T2DM). Alpha-lipoic acid (ALA) attenuates the progression of DSPN through its antioxidant and vasculoprotective effects. Kallistatin has antioxidant and anti-inflammatory properties.
View Article and Find Full Text PDFLevothyroxine therapy reduces endocan and total cholesterol concentrations in patients with subclinical hypothyroidism.
Biochem Med (Zagreb)
February 2025
Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia.
Introduction: Subclinical hypothyroidism (SCH) is an independent risk factor for cardiovascular diseases due to endothelial dysfunction and atherosclerosis development. The aim of this study was to determine whether the levothyroxine therapy could impact the concentrations of endothelial dysfunction blood markers, namely endothelin-1 (ET-1), asymmetric dimethylarginine (ADMA) and endocan, in patients with a mild form of SCH (thyroid-stimulating hormone (TSH) ≤ 10 mIU/L).
Materials And Methods: In this case-control prospective study, SCH patients and healthy controls were recruited during their regular health examinations.
Want 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!