Enkephalins play a great role in management of pain, blood pressure, hypertension and cardiovascular diseases. Enkephalins are short-lived molecules being rapidly hydrolyzed following their synaptic release by enkephalin degrading enzymes. The inhibitors of enkephalin degrading enzymes are able to prolong the duration of action of enkephalins. This review will focus on the inhibitors of enkephalin degrading enzymes as a novel therapeutic approach for cancer itself and also in cancer and neuropathic pain management with discussion on the present status and future directions for a new class of drugs.
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Co-Expression of Tardive Dyskinesia and Drug-Induced Parkinsonism in Rats Chronically Treated With Haloperidol.
Neuropsychopharmacol Rep
March 2025
Department of Neurology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
Aim: We aimed to create a rat model of drug-induced parkinsonism and tardive dyskinesia by chronic administration of haloperidol and examine the expression of direct and indirect pathway markers in the striatum of the model rats.
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Asymmetric intra and inter-hemispheric subcellular rat brain correlation of arginyl-aminopeptidase activity during development and aging.
Brain Res
December 2024
Department of Physiology, Faculty of Medicine, University of Granada, Granada 18071, Spain.
The functional significance of brain asymmetry is still largely unknown. Studying the level of correlation of neuropeptide-degrading activities between subcellular fractions such as synaptosomal, of the left and right hemispheres of male rats during development and aging could provide relevant data on their functional role during these periods. The present study analyzes the level of correlation of a enkephalin- or angiotensin III-degrading activity, such as membrane-bound arginyl-aminopeptidase activity (M-B ArgAP) between the left versus right homogenate and/or synaptosomal subcellular fractions obtained and processed independently from both brain hemispheres during development and aging.
View Article and Find Full Text PDFNeprilysin-Mediated Amyloid Beta Clearance and Its Therapeutic Implications in Neurodegenerative Disorders.
ACS Pharmacol Transl Sci
December 2024
Centre for Advanced Research (CFAR), Faculty of Medicine, King George's Medical University (KGMU), Lucknow 226003, India.
Neprilysin (NEP) is a neutral endopeptidase, important for the degradation of amyloid beta (Aβ) peptides and other neuropeptides, including enkephalins, substance P, and bradykinin, in the brain, that influences various physiological processes such as blood pressure homeostasis, pain perception, and neuroinflammation. NEP breaks down Aβ peptides into smaller fragments, preventing the development of detrimental aggregates such as Aβ plaques. NEP clears Aβ plaques predominantly by enzymatic breakdown in the extracellular space.
View Article and Find Full Text PDFObjective: Aim: The aim of the study was evaluation of the methionine-enkephalin in patients with severe COVID-19 with various activities of the renin-aldosterone system in comparison with COVID-19 patients with pre-existing comorbidities (renal cell cancer, critical limb ischemia) and adverse pregnancy outcomes..
Patients And Methods: Materials and Methods: To test our hypothesis, this case-control study consisted of 20 healthy donors (control group); 49 patients with a positive diagnosis of COVID-19 according to PCR analysis; 15 patients with a positive diagnosis of COVID-19 in combination with renal cell cancer; 29 patients with a positive diagnosis of COVID-19 in combination with critical limb ischemia, 10 pregnant womens with COVID-19.
Behavioral Features and Blood Enzyme Activity in Offspring of Rats Conceived from an Alcohol-Intoxicated Father.
Biochemistry (Mosc)
November 2024
Federal Research Center for Innovator and Emerging Biomedical and Pharmaceutical Technologies, P. K. Anokhin Research Institute of Normal Physiology, Moscow, 125315, Russia.
Article Synopsis
- * Results show that offspring of intoxicated fathers have significantly reduced motor activity and altered anxiety-like and depressive-like behaviors.
- * The findings suggest that alcohol consumption by males may affect gene methylation in offspring, leading to changes in enzyme activity and neuropeptide balance that influence behavior.
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