ArticleMolecular pain2010
Endogenous N-acetylaspartylglutamate (NAAG) inhibits synaptic plasticity/transmission in the amygdala in a mouse inflammatory pain model.
Article in Molecular pain, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
57 citing papers in PubMed, 73 citations in OpenAlex.
- N-acetyl-aspartyl-glutamate connects neuroinflammatory signatures to attention and working memory in people with HIV.AIDS (London, England) · 2026Article
- Mass spectrometry-guided discovery of novel GCPII inhibitor scaffolds.Frontiers in pharmacology · 2025Article
- Inhibition of brain glutamate carboxypeptidase II (GCPII) to enhance cognitive function.Advances in pharmacology (San Diego, Calif.) · 2025Review
- Neurometabolic signatures of gastrointestinal symptoms in the insula of Crohn's disease patients: explorative findings from a 7T MRS study.Frontiers in human neuroscience · 2025Article
- Cells and circuits for amygdala neuroplasticity in the transition to chronic pain.Cell reports · 2024Article
- Dysfunction of Small-Conductance CaCells · 2024Article
- Amelioration of pain and anxiety in sleep-deprived rats by intra-amygdala injection of cinnamaldehyde.Sleep medicine: X · 2023Article
- Hmgb1 Silencing in the Amygdala Inhibits Pain-Related Behaviors in a Rat Model of Neuropathic Pain.International journal of molecular sciences · 2023Article
- Is there hemispheric specialization in the chronic pain brain?Experimental neurology · 2022Review
- Review
- Melanocortin-4 receptor signaling in the central amygdala mediates chronic inflammatory pain effects on nociception.Neuropharmacology · 2022Article
- Sex Differences in CGRP Regulation and Function in the Amygdala in a Rat Model of Neuropathic Pain.Frontiers in molecular neuroscience · 2022Article
- Dendrimer-2PMPA selectively blocks upregulated microglial GCPII activity and improves cognition in a mouse model of multiple sclerosis.Nanotheranostics · 2022Article
- Ifenprodil Reduced Expression of Activated Microglia, BDNF and DREAM Proteins in the Spinal Cord Following Formalin Injection During the Early Stage of Painful Diabetic Neuropathy in Rats.Journal of molecular neuroscience : MN · 2021Article
- Amygdala, neuropeptides, and chronic pain-related affective behaviors.Neuropharmacology · 2020Review
- Analgesic and Anti-Inflammatory Effects of Perampanel in Acute and Chronic Pain Models in Mice: Interaction With the Cannabinergic System.Frontiers in pharmacology · 2020Article
- Amygdala physiology in pain.Handbook of behavioral neuroscience · 2020Article
- Opioids differentially modulate two synapses important for pain processing in the amygdala.British journal of pharmacology · 2020Article
- Enhanced Oral Bioavailability of 2-(Phosphonomethyl)-pentanedioic Acid (2-PMPA) from its (5-Methyl-2-oxo-1,3-dioxol-4-yl)methyl (ODOL)-Based Prodrugs.Molecular pharmaceutics · 2019Article
- Contribution of Corticotropin-Releasing Factor Receptor 1 (CRF1) to Serotonin Receptor 5-HTInternational journal of molecular sciences · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgroundThe peptide neurotransmitter N-acetylaspartylglutamate (NAAG) is widely expressed throughout the vertebrate nervous system, including the pain processing neuraxis. Inhibitors of NAAG peptidases are analgesic in animal models of pain. However, the brain regions involved in NAAG's analgesic action have not been rigorously defined. Group II metabotropic glutamate receptors (mGluR2/3) play a role in pain processing in the laterocapsular part of the central nucleus of the amygdala (CeLC). Given the high concentration of NAAG in the amygdala and its activation of group II mGluRs (mGluR3 > mGluR2), this study was undertaken using the mouse formalin model of inflammatory pain to test the hypothesis that NAAG influences pain processing in the amygdala. Evoked excitatory postsynaptic currents (eEPSCs) were studied in neurons in the CeLC of mouse brain slices following stimulation of the spinoparabrachial amygdaloid afferents.
resultsApplication of a NAAG peptidase inhibitor, ZJ43, dose dependently inhibited the amplitude of the eEPSCs by up to 50% in control CeLC demonstrating the role of NAAG in regulation of excitatory transmission at this synapse. A group II mGluR agonist (SLx-3095-1) similarly inhibited eEPSC amplitude by about 30%. Both effects were blocked by the group II mGluR antagonist LY341495. ZJ43 was much less effective than SLx in reducing eEPSCs 24 hours post inflammation suggesting an inflammation induced reduction in NAAG release or an increase in the ratio of mGluR2 to mGluR3 expression. Systemic injection of ZJ43 proximal to the time of inflammation blocked peripheral inflammation-induced increases in synaptic transmission of this pathway 24 hrs later and blocked the induction of mechanical allodynia that developed by this time point.
conclusionsThe main finding of this study is that NAAG and NAAG peptidase inhibition reduce excitatory neurotransmission and inflammation-induced plasticity at the spinoparabrachial synapse within the pain processing pathway of the central amygdaloid nucleus.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.