Cited by 79Genetics and Neurodevelopmental DisordersNeuroscience and Neuropharmacology ResearchDown syndrome and intellectual disability research

NNZ-2566, a novel analog of (1–3) IGF-1, as a potential therapeutic agent for fragile X syndrome

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Deacon, Robert M. J., Glass, Larry, Snape, Mike, Hurley, Michael J., Altimiras, Francisco J., Biekofsky, Rodolfo R., Cogram, Patricia·2015·NeuroMolecular Medicine

Abstract

Fragile X syndrome (FXS) is the most common form of inherited intellectual disability. Previous studies have implicated mGlu5 in the pathogenesis of the disease, and many agents that target the underlying pathophysiology of FXS have focused on mGluR5 modulation. In the present work, a novel pharmacological approach for FXS is investigated. NNZ-2566, a synthetic analog of a naturally occurring neurotrophic peptide derived from insulin-like growth factor-1 (IGF-1), was administered to fmr1 knockout mice correcting learning and memory deficits, abnormal hyperactivity and social interaction, normalizing aberrant dendritic spine density, overactive ERK and Akt signaling, and macroorchidism. Altogether, our results indicate a unique disease-modifying potential for NNZ-2566 in FXS. Most importantly, the present data implicate the IGF-1 molecular pathway in the pathogenesis of FXS. A clinical trial is under way to ascertain whether these findings translate into clinical effects in FXS patients.

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Crossref · 10.1007/s12017-015-8341-2

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  • Improvements in dendritic spine abnormalities, astrogliosis, neuroinflammation, glial activation, and downregulation of the MEK-ERK and PI3K-mTOR pathways were seen with trofinetide treatment leading to improvements in behavior and morphology of FXS.

    “Improvements in dendritic spine abnormalities, astrogliosis, neuroinflammation, glial activation, and downregulation of the MEK-ERK and PI3K-mTOR pathways were seen with trofinetide treatment leading to improvements in behavior and morphology of FXS [139].”
  • The KO mouse was deficient in IGF1 in the brain, and this was normalized with trofinetide treatment for 28 days.

    “The KO mouse was deficient in IGF1 in the brain, and this was normalized with trofinetide treatment for 28 days.”
  • In fragile X knockout mouse studies, trofinetide had several positive effects at a dose of 100 mg/kg/day.

    “In the fragile X knockout (KO), mouse studies trofinetide had several positive effects at a dose of 100 mg/kg/day yielding insight as to why it is beneficial in FXS [139].”

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Authors
Deacon, R. M. J., Glass, L., Snape, M., Hurley, M. J., Altimiras, F. J., Biekofsky, R. R., & Cogram, P.
Affiliations
  • Imperial College London (GB)
  • University of Chile (CL)
  • Fraunhofer Chile Research Foundation (CL)
Corresponding author
  • Glass, Larry
  • Cogram, Patricia
Venue
NeuroMolecular Medicine
Published
2015-01-23
Volume
17
Issue
1
Pages
71-82
ISSN
  • 1535-1084 (ISSN-L)
  • 1559-1174
OpenAlex
W2044280569
Cited by
78
References
39
Citations by year
2026: 5 · 2025: 4 · 2024: 5 · 2023: 7 · 2022: 5 · 2021: 13 · 2020: 8 · 2019: 5 · 2018: 2 · 2017: 13 · 2016: 9 · 2015: 2
FWCI
5.92
Type
journal article
Language
en
Open access
Licence
Locations
  • NeuroMolecular Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
  • Fraunhofer-Publica (Fraunhofer-Gesellschaft) (submittedVersion)
  • Universidad de Chile (submittedVersion, cc-by-nc-nd)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
Keywords
fragile X syndrome, IGF-1 signaling, FMRP, mGluR5, Fmr1 knockout mice, learning and memory impairment, hyperactivity, social interaction, dendritic spine density, ERK signaling, Akt signaling, macroorchidism, disease-modifying therapy, intellectual disability
MeSH terms
Animals, Anxiety, Brain, Conditioning, Classical, Dendrites, Drug Evaluation, Preclinical, Exploratory Behavior, Fear, Fragile X Syndrome, Glutamates, Insulin-Like Growth Factor I, Interpersonal Relations, Male, Mice, Inbred C57BL, Nerve Tissue Proteins, Nesting Behavior, Oligopeptides, Testis, Mice, Knockout, Neuroprotective Agents, Maze Learning, MAP Kinase Signaling System, Proto-Oncogene Proteins c-akt, Mice, Fragile X Messenger Ribonucleoprotein 1

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