Objectives: Pituitary adenylate cyclase activating polypeptide (PACAP) and vasoactive intestinal polypeptide (VIP) belong to the same peptide family, and both neuropeptides have been shown to exert in vitro and in vivo neurotrophic and neuroprotective effects. The aim of the present study was to investigate and compare the protective effects of PACAP and VIP in permanent focal cerebral ischemia in rats. The effect on the progression of the cerebral infarct was also studied.
Method: Male rats were injected 450 pmol PACAP or VIP dissolved in physiological saline intracerebroventricularly, preceding the occlusion of the middle cerebral artery. Control animals received vehicle treatment. Permanent focal ischemia was induced by the intraluminal filament occlusion of the middle cerebral artery. Animals were sacrificed 12 or 24 hours after the onset of ischemia, and infarcted brain areas were determined by staining bran sections with triphenyl-tetrazolium chloride.
Results: Twelve hours after ischemia, the infarcted brain volume resulted to be 14.8% in the control group, 15.3% in the VIP-treated group and 5.8% in the PACAP-treated animals. Twenty-four hours after middle cerebral artery occlusion, the infarcted brain volumes were 21.5%, 20.7% and 14.3% in the control, VIP and PACAP-treated animals, respectively.
Conclusion: Our results provide further evidence for the neuroprotective effects of PACAP38 as given in form of a preischemic bolus. It slows down the progression of the evolution of the infarct and reduces the final infarct size. In contrast, a related peptide, VIP, does not have neuroprotective effects under the same experimental conditions.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Electroacupuncture Ameliorated Locomotor Symptoms in MPTP-Induced Mice Model of Parkinson's Disease by Regulating Autophagy via Nrf2 Signaling.
J Neurophysiol
January 2025
School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong Province, China.
Parkinson's disease (PD) is a prevalent and challenging neurodegenerative disorder, and may involve impaired autophagy. Nuclear factor erythroid-2-related factor 2 (Nrf2) is crucial for regulating autophagy-related genes, maintaining cellular homeostasis. Electroacupuncture (EA), a complementary and alternative therapy for PD, has gained widespread clinical application.
View Article and Find Full Text PDFDiscovery of HZS60 as a Novel Brain Penetrant NMDAR/TRPM4 Interaction Interface Inhibitor with Improved Activity and Pharmacokinetic Properties for the Treatment of Cerebral Ischemia.
J Med Chem
January 2025
Department of Neurology, the Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China.
The death signaling complex comprising extrasynaptic NMDAR and TRPM4 plays a pivotal role in the pathogenesis of ischemic stroke. Targeting the protein-protein interactions between NMDAR and TRPM4 represents a promising therapeutic strategy for ischemic stroke. Herein, we describe the discovery of a novel series of NMDAR/TRPM4 interaction interface inhibitors aimed at enhancing neuroprotective efficacy and optimizing pharmacokinetic profiles.
View Article and Find Full Text PDFMalnutrition/exercise interaction in the rat mother-pup dyad: a behavioral and electrophysiological analysis.
Nutr Neurosci
January 2025
Department of Nutrition, Federal University of Pernambuco, Recife, Brazil.
Objectives: Maternal protein malnutrition alters brain functioning, impairing fetal development. Physical exercise during gestation benefits the fetal organism from maternal adaptive changes that may be neuroprotective. This study evaluated the effect of a low-protein diet associated with maternal voluntary physical activity (VPA) on rats' behavioral and brain electrophysiological parameters in the mother-pup dyad.
View Article and Find Full Text PDFDietary Methionine Restriction Alleviates Cognitive Impairment in Alzheimer's Disease Mice via Sex-Dependent Modulation on Gut Microbiota and Tryptophan Metabolism: A Multiomics Analysis.
J Agric Food Chem
January 2025
Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
Plant-based foods with low methionine contents have gained increasing interest for their potential health benefits, including neuroprotective effects. Methionine restriction (MR) linked to a plant-based diet has been shown to mitigate neurodegenerative diseases such as Alzheimer's disease (AD) through mechanisms that involve the gut microbiota. In this study, a 16-week MR diet (0.
View Article and Find Full Text PDFThe Neuroprotective Effects of Caffeine in a Neonatal Hypoxia-Ischemia Model are Regulated through the AMPK/mTOR Pathway.
Int J Biol Sci
January 2025
Department of Neonatology and Pediatric Intensive Care, Children's Hospital University of Bonn, Bonn, Germany.
Neonatal hypoxic-ischemic encephalopathy (HIE) is the most common cause of death and long-term disabilities in term neonates. Caffeine exerts anti-inflammatory effects and has been used in neonatal intensive care units in recent decades. In our neonatal rat model of hypoxic-ischemic (HI) brain injury, we demonstrated that a single daily dose of caffeine (40 mg/kg) for 3 days post-HI reduced brain tissue loss and microgliosis compared to the vehicle group.
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!