Cited by 135Parkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatmentsNuclear Receptors and Signaling

Effects of a NR2B selective NMDA glutamate antagonist, CP‐101,606, on dyskinesia and parkinsonism

Open access
Nutt, John G., Gunzler, Steven A., Kirchhoff, Trish, Hogarth, Penelope, Weaver, Jerry L., Krams, Michael, Jamerson, Brenda, Menniti, Frank S. +1 more·2008·Movement Disorders

Abstract

Glutamate antagonists decrease dyskinesia and augment the antiparkinsonian effects of levodopa in animal models of Parkinson's disease (PD). In a randomized, double‐blind, placebo‐controlled clinical trial, we investigated the acute effects of placebo and two doses of a NR2B subunit selective NMDA glutamate antagonist, CP‐101,606, on the response to 2‐hour levodopa infusions in 12 PD subjects with motor fluctuations and dyskinesia. Both doses of CP‐101,606 reduced the maximum severity of levodopa‐induced dyskinesia ∼30% but neither dose improved Parkinsonism. CP‐101,606 was associated with a dose‐related dissociation and amnesia. These results support the hypothesis that glutamate antagonists may be useful antidyskinetic agents. However, future studies will have to determine if the benefits of dyskinesia suppression can be achieved without adverse cognitive effects. © 2008 Movement Disorder Society

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/mds.22169

Cites

31 of 31 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Broadly, these agents demonstrated no significant antidepressant efficacy and an adverse events profile that led to early terminations of some clinical trials in MDD, TRD, and Parkinson's disease.

    “Broadly, these agents demonstrated no significant antidepressant efficacy and an adverse events profile that led to the early terminations of some clinical trials in indications such as MDD, TRD, and Parkinson's disease [169,170]”

    From Ketamine in neuropsychiatric disorders: an update (2024) · cites this paper as [169]

    The Results (Adverse Events; page unavailable) report abnormal thinking, depersonalization, and amnesia in patients with Parkinson’s disease receiving CP-101,606. The paper does not report antidepressant efficacy in MDD or TRD, or say that adverse events led to early termination of a trial. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • NR2B-specific subunit antagonists such as traxoprodil, MK-0657, and eliprodil were developed but suffered similar failures.

    “NR2B-specific subunit antagonists such as traxoprodil (CP-101,606), MK-0657 (CERC-301), and eliprodil (EVT-101) were developed but suffered similar failures.”

    From Ketamine in neuropsychiatric disorders: an update (2024) · cites this paper as [169]

    The Introduction identifies CP-101,606 as an NR2B-selective antagonist, and the References identify traxoprodil by name. The Discussion’s Conclusion says motor and cognitive effects may limit the class’s usefulness, but it does not call CP-101,606 a failure; it also suggests a lower dose might offer an acceptable balance of benefit and adverse effects. The paper does not address MK-0657 or eliprodil. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 32 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Nutt, J. G., Gunzler, S. A., Kirchhoff, T., Hogarth, P., Weaver, J. L., Krams, M., Jamerson, B., Menniti, F. S., & Landen, J. W.
Affiliations
  • Oregon Health & Science University (US)
  • Pfizer (United States) (US)
  • Campbell University (US)
Corresponding author
Nutt, John G.
Venue
Movement Disorders
Publisher
Wiley
Published
2008-10-15
Volume
23
Issue
13
Pages
1860-1866
ISSN
  • 0885-3185 (ISSN-L)
  • 1531-8257
OpenAlex
W1982761758
Cited by
133
References
32
Citations by year
2025: 2 · 2023: 7 · 2022: 5 · 2021: 9 · 2020: 11 · 2019: 6 · 2018: 7 · 2017: 7 · 2016: 5 · 2015: 10 · 2014: 13 · 2013: 19 · 2012: 6
FWCI
5.51
Type
journal article
Language
en
Open access
Locations
  • Movement Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Deutsches Krebsforschungszentrum
  • National Institute of Neurological Disorders and Stroke (R01NS021062)
  • National Center for Research Resources (UL1RR024140)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
CP-101,606, NR2B subunit, NMDA receptor antagonists, glutamate receptor antagonists, levodopa-induced dyskinesia, parkinsonism, Parkinson's disease, motor fluctuations, dissociation, amnesia, cognitive side effects
MeSH terms
Aged, Double-Blind Method, Humans, Levodopa, Middle Aged, Piperidines, Severity of Illness Index, Dopamine Agents, Cross-Over Studies, Excitatory Amino Acid Antagonists, Parkinsonian Disorders, Dyskinesias

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review