Cited by 53Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Effect of a 5-HT2C serotonin agonist, dexnorfenfluramine, on amyloid precursor protein metabolism in guinea pigs

Arjona, Anibal A, Pooler, Amy M, Lee, Robert K, Wurtman, Richard J·2002·Brain Research

Abstract

Stimulation of serotonin receptor subtypes 5-HT(2A) or 5-HT(2C) in stably transfected 3T3 cells by dexnorfenfluramine (DEXNOR) or serotonin increases secretion of the APP metabolite APP(s). It is not known whether activation of these receptors can also affect APP metabolism in vivo. We examined the effects of a single intraperitoneal (i.p.) injection of DEXNOR on APP(s) levels in cerebrospinal fluid (CSF) of guinea pigs. These levels were significantly (P<0.05) increased by a single dose of DEXNOR (1-4 mg/kg); those of the APP metabolites Abeta(1-40) and Abeta(1-42) were unaffected. The DEXNOR-induced (1 mg/kg) increases in CSF APP(s) were suppressed by ritanserin (1 mg/kg) but not by ketanserin (2 mg/kg). When given alone, ritanserin did not affect CSF levels of APP(s), Abeta(1-40), or Abeta(1-42). Chronic treatment with DEXNOR for 9 days (1 mg/kg bid, i.p.) increased CSF APP(s) levels, measured 2 h after the last injection (P<0.05), and decreased those of CSF Abeta(1-42) (P<0.05). Neither hippocampal nor cortical levels of the APP holoprotein (APP(h)), nor body weight, were affected by DEXNOR. Chronic administration of mCPP (1-(m-chlorophenyl)piperazine) (2 mg/kg bid, i.p.), a 5-HT(2B/2C) agonist, for 9 days also increased CSF APP(s) levels (P<0.5) when measured 2 h after the drug's last administration; hippocampal and cortical APP(h) levels were unaffected. However, mCPP also caused a significant decrease in body weight gain. These data indicate that the pharmacological ac…

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Crossref · 10.1016/s0006-8993(02)03153-0

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Authors
Arjona, A. A., Pooler, A. M., Lee, R. K., & Wurtman, R. J.
Affiliations
  • Massachusetts Institute of Technology (US)
  • Harvard University (US)
Corresponding author
Wurtman, Richard J
Venue
Brain Research
Publisher
Elsevier BV
Published
2002-09
Volume
951
Issue
1
Pages
135-140
ISSN
0006-8993 (ISSN-L)
OpenAlex
W1970371846
Cited by
52
References
23
Citations by year
2025: 3 · 2024: 2 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 3 · 2017: 2 · 2016: 4 · 2015: 2 · 2014: 5 · 2013: 2 · 2012: 1
FWCI
2.20
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH 28783)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
5-HT2C receptor, dexfenfluramine, amyloid precursor protein, cerebrospinal fluid, amyloid-beta, 5-HT2A receptor, ritanserin, ketanserin, mCPP, Alzheimer's disease, weight gain, hippocampus, cortex
MeSH terms
Alzheimer Disease, Animals, Body Weight, Brain, Cerebral Cortex, Dose-Response Relationship, Drug, Drug Interactions, Guinea Pigs, Hippocampus, Ketanserin, Male, Norfenfluramine, Peptide Fragments, Receptors, Serotonin, Serotonin, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Ritanserin, Selective Serotonin Reuptake Inhibitors, Receptor, Serotonin, 5-HT2C

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