Evidence map›Paper›PMID 30507963›Full record

ArticlePloS one2018

Leucine rich repeat kinase 2 (LRRK2) GLY2019SER mutation is absent in a second cohort of Nigerian Africans with Parkinson disease.

Njideka U Okubadejo, Mie Rizig, Oluwadamilola O Ojo, Hallgeir Jonvik, Olajumoke Oshinaike, Emmeline Brown, Henry Houlden

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 15% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
  2. Observational
  3. Article
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  5. Review
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  10. Review
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  12. Article
  13. Autophagy and LRRK2 in the Aging Brain.Frontiers in neuroscience · 2019
    Review
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 3 institutions in 2 countries.

Njideka U OkubadejoNeurology Unit, Department of Medicine, Faculty of Clinical Sciences, College of Medicine, University of Lagos & Lagos University Teaching Hospital, Idi Araba, Lagos State, Nigeria.ORCID 0000-0003-2975-8803
Mie RizigDepartment of Molecular Neuroscience, UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
Oluwadamilola O OjoNeurology Unit, Department of Medicine, Faculty of Clinical Sciences, College of Medicine, University of Lagos & Lagos University Teaching Hospital, Idi Araba, Lagos State, Nigeria.
Hallgeir JonvikDepartment of Molecular Neuroscience, UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
Olajumoke OshinaikeDepartment of Medicine, Lagos State University Teaching Hospital, Ikeja, Lagos State, Nigeria.
Emmeline BrownDepartment of Molecular Neuroscience, UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
Henry HouldenDepartment of Molecular Neuroscience, UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
National Hospital for Neurology and Neurosurgery · GBUniversity of Lagos · NGLagos State University Teaching Hospital · NG

Funding

Medical Research Council G1001253
6 · The paper itself

Abstract

To date the LRRK2 p.G2019S mutation remains the most common genetic cause of Parkinson disease (PD) worldwide. It accounts for up to 6% of familial and approximately 1.5% of sporadic cases. LRRK2 has a kinase enzymatic domain which provides an attractive potential target for drug therapies and LRRK2 kinase inhibitors are in development. Prevalence of the p.G2019S has a variable ethnic and geographic distribution, the highest reported among Ashkenazi Jews (30% in patients with familial PD, 14% in sporadic PD, 2.0% in controls) and North African Berbers (37% in patients with familial PD, 41% in sporadic PD, and 1% in controls). Little is known about the frequency of the LRRK2 p.G2019S among populations in sub-Saharan Africa. Our group and others previously reported that the p.G2019S is absent in a small cohort of Nigerian PD patients and controls. Here we used Kompetitive Allele Specific PCR (KASP) assay to screen for the p.G2019S in a larger cohort of Black African PD patients (n = 126) and healthy controls (n = 54) from Nigeria. Our analysis confirmed that all patients and controls are negative for the p.G2019S mutation. This report provides further evidence that the LRRK2 p.G2019S is not implicated in PD in black populations from Nigeria and support the notion that p.G2019S mutation originated after the early human dispersal from sub-Saharan Africa. Further studies using larger cohorts and advance sequencing technology are required to underpin the genetic causes of PD in this region.

Indexed as

Genetic Predisposition to DiseaseAgedAged, 80 and overAllelesAmino Acid SubstitutionBlack PeopleCase-Control StudiesCohort StudiesFemaleGain of Function MutationHealthy VolunteersHumansLeucine-Rich Repeat Serine-Threonine Protein Kinase-2MaleMiddle AgedNigeriaLeucine-Rich Repeat Serine-Threonine Protein Kinase-2LRRK2 protein, human

Identifiers

PMID30507963
PMCPMC6277104
OpenAlexW2952804599

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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.