Evidence map›Paper›PMID 28274265›Full record

ArticleAlzheimer's research & therapy2017

Reduced cGMP levels in CSF of AD patients correlate with severity of dementia and current depression.

Raphael Hesse, Ludwig Lausser, Pauline Gummert, Florian Schmid, Anke Wahler, Cathrin Schnack, Katja S Kroker, Markus Otto, Hayrettin Tumani, Hans A Kestler and 2 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's research & therapy, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.5field-weighted citation impact, top 19% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 44 citations in OpenAlex.

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  7. Longevity, enhanced memory, and altered density of dendritic spines in hippocampal CA3 and dentate gyrus after hemizygous deletion of Pde2a in mice.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2025
    Article
  8. Review
  9. Transcription Factor-Wide Association Studies to Identify Functional SNPs in Alzheimer's Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  10. Article
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  12. Journal of Alzheimer's disease reports · 2024
    Article
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  15. The Interplay between cGMP and Calcium Signaling in Alzheimer's Disease.International journal of molecular sciences · 2022
    Review
  16. Review
  17. Review
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  19. Memory Enhancers for Alzheimer's Dementia: Focus on cGMP.Pharmaceuticals (Basel, Switzerland) · 2021
    Review
  20. cGMP via PKG activates 26S proteasomes and enhances degradation of proteins, including ones that cause neurodegenerative diseases.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 2 institutions in 1 country.

Raphael HesseDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Ludwig LausserInstitute of Medical Systems Biology, Ulm University, Ulm, Germany.
Pauline GummertDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Florian SchmidInstitute of Medical Systems Biology, Ulm University, Ulm, Germany.
Anke WahlerDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Cathrin SchnackDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Katja S KrokerDepartment of Drug Discovery Support, Boehringer Ingelheim Pharma GmbH & Co KG, Biberach, Germany.
Markus OttoDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Hayrettin TumaniDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany.
Hans A KestlerInstitute of Medical Systems Biology, Ulm University, Ulm, Germany. hans.kestler@uni-ulm.de.
Holger RosenbrockDepartment of CNS Diseases Research, Boehringer Ingelheim Pharma GmbH & Co KG, Biberach, Germany. holger.rosenbrock@boehringer-ingelheim.com.
Christine A F von ArnimDepartment of Neurology, Ulm University, Oberer Eselsberg 45, 89081, Ulm, Germany. christine.arnim@uni-ulm.de.
Universität Ulm · DEBoehringer Ingelheim (Germany) · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlzheimer's disease (AD) is a neurodegenerative disorder, primarily affecting memory. That disorder is thought to be a consequence of neuronal network disturbances and synapse loss. Decline in cognitive function is associated with a high burden of neuropsychiatric symptoms (NPSs) such as depression. The cyclic nucleotides cyclic adenosine-3',5'-monophosphate (cAMP) and cyclic guanosine-3',5'-monophosphate (cGMP) are essential second messengers that play a crucial role in memory processing as well as synaptic plasticity and are potential therapeutic targets. Biomarkers that are able to monitor potential treatment effects and that reflect the underlying pathology are of crucial interest.

methodsIn this study, we measured cGMP and cAMP in cerebrospinal fluid (CSF) in a cohort of 133 subjects including 68 AD patients and 65 control subjects. To address the association with disease progression we correlated cognitive status with cyclic nucleotide levels. Because a high burden of NPSs is associated with decrease in cognitive function, we performed an exhaustive evaluation of AD-relevant marker combinations in a depressive subgroup.

resultsWe show that cGMP, but not cAMP, levels in the CSF of AD patients are significantly reduced compared with the control group. Reduced cGMP levels in AD patients correlate with memory impairment based on Mini-Mental State Examination score (r = 0.17, p = 0.048) and tau as a marker of neurodegeneration (r = -0.28, p = 0.001). Moreover, we were able to show that AD patients suffering from current depression show reduced cGMP levels (p = 0.07) and exhibit a higher degree of cognitive impairment than non-depressed AD patients.

conclusionThese results provide further evidence for an involvement of cGMP in AD pathogenesis and accompanying co-morbidities, and may contribute to elucidating synaptic plasticity alterations during disease progression.

Indexed as

AgedAlzheimer DiseaseAmyloid beta-PeptidesBiomarkersCognitionCohort StudiesCyclic AMPCyclic GMPDepressionDisease ProgressionFemaleHumansMaleMental Status ScheduleMiddle AgedPeptide FragmentsAmyloid beta-Peptidesamyloid beta-protein (1-42)BiomarkersCyclic AMPCyclic GMPMAPT protein, humanPeptide Fragmentstau ProteinsAlzheimer’s diseaseCerebrospinal fluidcognitive declinecyclic nucleotidesNeuropsychiatric symptoms

Identifiers

PMID28274265
PMCPMC5343324
OpenAlexW2594925500

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.