Evidence map›Paper›PMID 32035846›Full record

ArticleNeurobiology of aging2020

Screening of the glucocerebrosidase (GBA) gene in South Africans of African ancestry with Parkinson's disease.

Amokelani C Mahungu, David G Anderson, Anastasia C Rossouw, Riaan van Coller, Jonathan A Carr, Owen A Ross, Soraya Bardien

Open access · greenAbstract read
In one paragraph

Article in Neurobiology of aging, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
0.8field-weighted citation impact, top 26% 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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it, 19 citations in OpenAlex.

  1. Genetic Landscape of Monogenic Parkinson's Disease in the African Population-A Systematic Review.Movement disorders : official journal of the Movement Disorder Society · 2026
    Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Review
  6. Consensus Guidance for Genetic Counseling in GBA1 Variants: A Focus on Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2024
    Review
  7. Article
  8. Review
  9. Article
  10. Classification of GBA1 Variants in Parkinson's Disease: The GBA1-PD Browser.Movement disorders : official journal of the Movement Disorder Society · 2023
    Review
  11. International journal of molecular sciences · 2023
    Review
  12. Review
  13. GBA-associated PD: chances and obstacles for targeted treatment strategies.Journal of neural transmission (Vienna, Austria : 1996) · 2022
    Review
  14. Review
  15. Article
  16. Frontiers in cell and developmental biology · 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

7 authors at 6 institutions in 2 countries.

Amokelani C MahunguFaculty of Medicine and Health Sciences, Division of Molecular Biology and Human Genetics, Stellenbosch University, Cape Town, South Africa.
David G AndersonUniversity of the Witwatersrand Donald Gordon Medical Centre, Neurology, University of the Witwatersrand, Johannesburg, South Africa.
Anastasia C RossouwFaculty of Health Sciences, Division of Neurology, Department of Medicine, Walter Sisulu University, East London, South Africa.
Riaan van CollerFaculty of Health Sciences, School of Medicine, Department of Neurology, University of Pretoria, South Africa.
Jonathan A CarrFaculty of Medicine and Health Sciences, Division of Neurology, Stellenbosch University, Cape Town, South Africa.
Owen A RossDepartment of Neuroscience, Mayo Clinic, Jacksonville, FL, USA; Department of Clinical Genomics, Mayo Clinic College of Medicine, Jacksonville, FL, USA.
Soraya BardienFaculty of Medicine and Health Sciences, Division of Molecular Biology and Human Genetics, Stellenbosch University, Cape Town, South Africa. Electronic address: sbardien@sun.ac.za.
Stellenbosch University · ZAJacksonville College · USUniversity of Pretoria · ZAUniversity of the Witwatersrand · ZAWalter Sisulu University · ZAWestern Cape Department of Health · ZA

Funding

Neuropathology CoreP50NS072187 · NINDS · MAYO CLINIC JACKSONVILLE · PI DICKSON, DENNIS WILLIAM · 2010 to 2017
$8.7M
NINDS NIH HHS P50 NS072187
6 · The paper itself

Abstract

Sequence variants in glucocerebrosidase (GBA) are a major genetic risk factor for Parkinson's disease (PD), and display ethnic-dependent frequencies, for example, variants such as p.N370S and 84insGG are common in Ashkenazi Jewish patients. Notably, there are limited studies on black patients from the African continent; hence, we conducted a study on 30 South African black PD patients. All 11 exons of GBA were screened using a nested PCR approach to avoid pseudogene contamination. We identified previously described Gaucher's disease-associated variants, p.R120W in one patient [age at onset (AAO) of 35 years], and p.R131L in another patient (AAO 30 years) and in her affected sibling (AAO 45 years). In addition, we found 3 previously identified [p.K(-27)R, p.T36del, and p.Q497*] and 2 novel (p.F216L and p.G478R) variants. Screening of ethnic-matched controls for the novel variants revealed that the allele frequency of p.F216L was 9.9%, whereas p.G478R was not found in the controls. Studies such as these are important and necessary to reveal the genetic architecture underlying PD in the understudied patients of African ancestry.

Indexed as

Genetic Association StudiesGenetic VariationAged, 80 and overBlack PeopleExonsFemaleGene FrequencyGenetic Predisposition to DiseaseGenetic TestingGlucosylceramidaseHumansMaleParkinson DiseaseRisk FactorsSouth AfricaGlucosylceramidaseAfrican ancestryGBA variantsGlucocerebrosidaseParkinson's diseaseSouth African

Identifiers

PMID32035846
PMCPMC7085451
OpenAlexW2996318569

What OpenQuestion holds

Textmetadata
LicenceTDM
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.