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The effect of LRRK2 loss-of-function variants in humans

  • Genome Aggregation Database Production Team
  • , Genome Aggregation Database Consortium
  • , 23andMe Research Team
  • , Nicola Whiffin
  • , Aaron Kleinman
  • , Jamie L. Marshall
  • , Eric V. Minikel
  • , Julia K. Goodrich
  • , Nicholas M. Quaife
  • , Joanne B. Cole
  • , Qingbo Wang
  • , Konrad J. Karczewski
  • , Beryl Cummings
  • , Laurent Francioli
  • , Kristen M. Laricchia
  • , Anna Guan
  • , Babak Alipanahi
  • , Peter Morrison
  • , Marco A.S. Baptista
  • , Kalpana M. Merchant
  • Jessica Alföldi, Irina M. Armean, Eric Banks, Louis Bergelson, Kristian Cibulskis, Ryan L. Collins, Kristen M. Connolly, Miguel Covarrubias, Mark J. Daly, Stacey Donnelly, Yossi Farjoun, Steven Ferriera, Stacey Gabriel, Laura D. Gauthier, Jeff Gentry, Namrata Gupta, Thibault Jeandet, Diane Kaplan, Christopher Llanwarne, Ruchi Munshi, Benjamin M. Neale, Sam Novod, Anne H. O’Donnell-Luria, Nikelle Petrillo, Terho Lehtimäki, Kari M. Mattila, Jaana Suvisaari

Research output: Contribution to journalArticleScientificpeer-review

95 Citations (Scopus)
10 Downloads (Pure)

Abstract

Human genetic variants predicted to cause loss-of-function of protein-coding genes (pLoF variants) provide natural in vivo models of human gene inactivation and can be valuable indicators of gene function and the potential toxicity of therapeutic inhibitors targeting these genes1,2. Gain-of-kinase-function variants in LRRK2 are known to significantly increase the risk of Parkinson’s disease3,4, suggesting that inhibition of LRRK2 kinase activity is a promising therapeutic strategy. While preclinical studies in model organisms have raised some on-target toxicity concerns5–8, the biological consequences of LRRK2 inhibition have not been well characterized in humans. Here, we systematically analyze pLoF variants in LRRK2 observed across 141,456 individuals sequenced in the Genome Aggregation Database (gnomAD)9, 49,960 exome-sequenced individuals from the UK Biobank and over 4 million participants in the 23andMe genotyped dataset. After stringent variant curation, we identify 1,455 individuals with high-confidence pLoF variants in LRRK2. Experimental validation of three variants, combined with previous work10, confirmed reduced protein levels in 82.5% of our cohort. We show that heterozygous pLoF variants in LRRK2 reduce LRRK2 protein levels but that these are not strongly associated with any specific phenotype or disease state. Our results demonstrate the value of large-scale genomic databases and phenotyping of human loss-of-function carriers for target validation in drug discovery.

Original languageEnglish
Pages (from-to)869-877
Number of pages9
JournalNature Medicine
Volume26
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020
Publication typeA1 Journal article-refereed

Funding

We thank the research participants and employees of 23andMe, Inc. and the research participants in gnomAD and the UK Biobank, for making this work possible. N. Whiffin is supported by a Rosetrees and Stoneygate Imperial College Research Fellowship. E.V. Minikel is supported by National Institutes of Health F31 AI22592. K.J.K. was supported by NIGMS F32 GM115208. This work was supported by the Michael J. Fox Foundation for Parkinson’s Research grant 12868, NIDDK U54DK105566, NIGMS R01GM104371, Wellcome Trust (107469/Z/15/Z); Medical Research Council (UK); NIHR Royal Brompton Biomedical Research Unit; NIHR Imperial Biomedical Research Centre. T.E is supported by Estonian Research Council grant PUT1660. L.M. is supported by Estonian Research Council grant PRG184. This research has been conducted using the UK Biobank Resource (https://doi.org/10.1101/572347) under Application Number 42890. These antibodies were selected based on their use in other publications and validation through IF and WB by the companies providing the antibodies. Company provided information is as follows: LRRK2: Immunogen: Fusion protein amino acids 970-2527 (C-terminus) of human LRRK2 (also known as Leucine-rich repeat serine/threonine-protein kinase 2, Dardarin and PARK8, accession number Q5S007) Mouse: 89% identity (1393/1557 amino acids identical) Rat: 89% identity (1392/1557 amino acids identical) <30% identity with LRRK1 Epitope mapped to within amino acids 1836-1845 (EGDLLVNPDQ) by PEPperPRINT through work funded by The Michael J. Fox Foundation for Parkinson’s Research. Monoclonal antibody info: Mouse strain: Balb/C Myeloma cell: SP2/0 Mouse Ig Isotype: IgG2a NeuroMab Applications: Immunoblot, Immunocytochemistry, Immunohistochemistry and Immunoprecipitation Species Reactivity: human, rat, mouse MW: > 200 kDa Immunoblot versus crude membranes from adult rat brain (RBM) and wild-type (WT) and LRRK2 KO mouse brains probed with N241A/34 (left) and K89/41 (right) TC supe. Mouse brain samples provided by Xiaojie Li, Ted Dawson and Valina Dawson (Johns Hopkins University). Adult rat brain immunohistochemistry (with antigen retrieval via sodium citrate pretreatment).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology

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