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Remote Ischemic Preconditioning Attenuates Ischemia-Reperfusion Injury Induced Reductions in Vascular Function through Release of Endogenous Opioids.
J Appl Physiol (1985)
January 2025
Department of Kinesiology, Health Promotion and Recreation, University of North Texas, Denton, Texas, USA.
Remote Ischemic Preconditioning (RIPC) is a therapy characterized by repeated bouts of limb ischemia and reperfusion. RIPC protects against ischemia-reperfusion injury (IRI), and preclinical studies suggest that this is mediated through release of endogenous opioids. We aimed to interrogate the role of endogenous opioids in RIPC-signaling in humans, using an arm model of IRI.
View Article and Find Full Text PDFLower Diversity of Amylase-Trypsin Inhibitors and -Released Opioid-Containing Peptides in Ancestral Compared to Modern Wheat Varieties Assessed by Proteomics and Peptidomics.
J Agric Food Chem
January 2025
Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, 1433 Ås, Norway.
This study focused on identifying amylase-trypsin inhibitors (ATIs) in seven Norwegian-cultivated wheat varieties, including common wheat and ancestral species, and identifying potentially harmful opioid peptides within the digesta of these wheats. LC-MS/MS analysis of tryptic peptides from ATI fractions revealed that the common wheat variety Børsum exhibited the highest diversity of ATIs ( = 24), while they were less represented in tetraploid emmer ( = 11). Hexaploid wheat Bastian showed low diversity and relative abundance of ATIs.
View Article and Find Full Text PDFPain is a dynamic and nonlinear experience shaped by injury and contextual factors, including expectations of future pain or relief . While µ opioid receptors are central to the analgesic effects of opioid drugs, the endogenous opioid neurocircuitry underlying pain and placebo analgesia remains poorly understood. The ventrolateral column of the posterior periaqueductal gray is a critical hub for nociception and endogenous analgesia mediated by opioid signaling .
View Article and Find Full Text PDFIntroduction: Mu-opioid receptors (MORs) are G-coupled protein receptors with a high affinity for both endogenous and exogenous opioids. MORs are widely expressed in the central nervous system (CNS), peripheral organs, and the immune system. They mediate pain and reward and have been implicated in the pathophysiology of opioid, cocaine, and other substance use disorders.
View Article and Find Full Text PDFCo-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.
Methods: We treated 21 rats, 14 with haloperidol decanoate and 7 with placebo. The number of vacuous chewing movements per 2 min was counted, and haloperidol-treated rats were classified into two groups: mild and severe tardive dyskinesia.
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