Evidence map›Paper›PMID 27011009›Full record

ArticlePloS one2016

Abnormal Salivary Total and Oligomeric Alpha-Synuclein in Parkinson's Disease.

Giorgio Vivacqua, Anna Latorre, Antonio Suppa, Michela Nardi, Sara Pietracupa, Romina Mancinelli, Giovanni Fabbrini, Carlo Colosimo, Eugenio Gaudio, Alfredo Berardelli

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 4 pooled it
7.2field-weighted citation impact, top 3% 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

73 citing papers in PubMed, 4 syntheses or guidelines pooled it, 133 citations in OpenAlex.

  1. Pooled it
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  4. Salivary alpha-synuclein as a biomarker for Parkinson's disease: a systematic review.Journal of neural transmission (Vienna, Austria : 1996) · 2019
    Pooled it
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  15. Early diagnosis of Parkinson's disease: biomarker study.Frontiers in aging neuroscience · 2025
    Review
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13 more citing papers are in PubMed but not listed here.

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

10 authors at 1 institution in 1 country.

Giorgio VivacquaDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Anna LatorreDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Antonio SuppaDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Michela NardiDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Sara PietracupaDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Romina MancinelliDepartment of Anatomic, Histologic, Forensic and Locomotor Apparatus Sciences, Sapienza University, Rome, Italy.
Giovanni FabbriniDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Carlo ColosimoDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Eugenio GaudioDepartment of Anatomic, Histologic, Forensic and Locomotor Apparatus Sciences, Sapienza University, Rome, Italy.
Alfredo BerardelliDepartment of Neurology and Psychiatry, Sapienza University, Rome, Italy.
Sapienza University of Rome · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In Parkinson's disease (PD), alpha-synuclein (a-syn) can be detected in biological fluids including saliva. Although previous studies found reduced a-syn total (a-syntotal) concentration in saliva of PD patients, no studies have previously examined salivary a-syn oligomers (a-synolig) concentrations or assessed the correlation between salivary a-syntotal, a-synolig and clinical features in a large cohort of PD patients. Is well known that a-synolig exerts a crucial neurotoxic effect in PD. We collected salivary samples from 60 PD patients and 40 age- and sex-comparable healthy subjects. PD was diagnosed according to the United Kingdom Brain Bank Criteria. Samples of saliva were analyzed by specific anti-a-syn and anti-oligomeric a-syn ELISA kits. A complete clinical evaluation of each patient was performed using MDS-Unified Parkinson's Disease Rating Scale, Beck Depression Inventory, Montreal Cognitive Assessment and Frontal Assessment Battery. Salivary a-syntotal was lower, whereas a-synolig was higher in PD patients than healthy subjects. The a-synolig/a-syntotal ratio was also higher in patients than in healthy subjects. Salivary a-syntotal concentration negatively correlated with that of a-synolig and correlated with several patients' clinical features. In PD, decreased salivary concentration of a-syntotal may reflect the reduction of a-syn monomers (a-synmon), as well as the formation of insoluble intracellular inclusions and soluble oligomers. The combined detection of a-syntotal and a-synolig in the saliva might help the early diagnosis of PD.

Indexed as

Protein AggregatesAdultAgedAged, 80 and overalpha-SynucleinBiomarkersCohort StudiesEarly DiagnosisFemaleHumansMaleMiddle AgedParkinson DiseaseSalivaSolubilityalpha-SynucleinBiomarkersProtein Aggregates

Identifiers

PMID27011009
PMCPMC4807094
OpenAlexW2306090256

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.