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Ammonia and beyond - biomarkers of hepatic encephalopathy.
Metab Brain Dis
January 2025
Fundación de Investigación Hospital Clínico Universitario de Valencia-INCLIVA, Valencia, 46010, Spain.
Ammonia is a product of amino acid metabolism that accumulates in the blood of patients with liver cirrhosis, leading to neurotoxic effects and hepatic encephalopathy (HE). HE manifestations can range from mild, subclinical disturbances in cognition, or minimal HE (mHE) to gross disorientation and coma, a condition referred to as overt HE. Many blood-based biomarkers reflecting these neurotoxic effects of ammonia and liver disease can be measured in the blood allowing the development of new biomarkers to diagnose cirrhosis patients at risk of developing HE.
View Article and Find Full Text PDFpoisoning in two horses: A case report.
Vet Med (Praha)
November 2024
Equine Clinic, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Brno, Czech Republic.
This case report describes the poisoning of two mares from the same paddock with (Black locust) bark. The poisoning manifested itself by the sudden onset of weakness and fever with transient improvement after the administration of non-steroidal anti-inflammatory drugs and fluids. After the initial stabilisation, the mares were left unattended overnight.
View Article and Find Full Text PDFBoswellic acid synergizes with low-dose ionizing radiation to mitigate thioacetamide-induced hepatic encephalopathy in rats.
BMC Pharmacol Toxicol
January 2025
Biochemistry Department, Faculty of Science, Ain-Shams University, Cairo, Egypt.
Hepatic encephalopathy (HE) is a syndrome that arises from acute or chronic liver failure. This study was devised to assess the impact of a combination of boswellic acid (BA) and low doses of gamma radiation (LDR) on thioacetamide (TAA)-induced HE in an animal model. The effect of daily BA treatment (175 mg/kg body weight, for four weeks) and/or fractionated low-dose γ-radiation (LDR; 0.
View Article and Find Full Text PDFCharacterization of a novel conditional knockout mouse model to assess efficacy of mRNA therapy in the context of severe ornithine transcarbamylase deficiency.
Mol Ther
January 2025
Moderna, Inc., Cambridge, MA, USA 02142. Electronic address:
Ornithine transcarbamylase deficiency (OTCD) is the most common urea cycle disorder, characterized by hyperammonemia and accompanied by a high unmet patient need. mRNA therapies have been shown to be efficacious in hypomorphic Sparse-fur abnormal skin and hair (Spf-ash) mice, a model of late-onset disease. However, studying the efficacy of ornithine transcarbamylase (OTC) mRNA therapy in traditional knockout mice, a model for severe early-onset OTCD, is hampered by the rapid lethality of the model, and poor lipid nanoparticle (LNP) uptake into neonatal mouse liver.
View Article and Find Full Text PDFβ-Catenin/c-Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations.
Adv Biol (Weinh)
January 2025
Laboratory of Clinical Proteomic, "V Fazzi" Hospital, Lecce, 73100, Italy.
Ammonia a by-product of nitrogen containing molecules is detoxified by liver into non-toxic urea and glutamine. Impaired ammonia detoxification leads to hyperammonemia. Ammonia has a dual role on autophagy, it acts as inducer at low concentrations and as inhibitor at high concentrations.
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