Cited by 44Immunodeficiency and Autoimmune DisordersT-cell and B-cell ImmunologyPlatelet Disorders and Treatments

A Germline Mutation in the C2 Domain of PLCγ2 Associated with Gain-of-Function Expands the Phenotype for PLCG2-Related Diseases

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Novice, Taylor, Kariminia, Amina, Del Bel, Kate L., Lu, Henry, Sharma, Mehul, Lim, Chinten J., Read, Jay, Lugt, Mark Vander +13 more·2020·Journal of Clinical Immunology

Abstract

We report three new cases of a germline heterozygous gain-of-function missense (p.(Met1141Lys)) mutation in the C2 domain of phospholipase C gamma 2 (PLCG2) associated with symptoms consistent with previously described auto-inflammation and phospholipase Cγ2 (PLCγ2)-associated antibody deficiency and immune dysregulation (APLAID) syndrome and pediatric common variable immunodeficiency (CVID). Functional evaluation showed platelet hyper-reactivity, increased B cell receptor-triggered calcium influx and ERK phosphorylation. Expression of the altered p.(Met1141Lys) variant in a PLCγ2-knockout DT40 cell line showed clearly enhanced BCR-triggered influx of external calcium when compared to control-transfected cells. Our results further expand the molecular basis of pediatric CVID and phenotypic spectrum of PLCγ2-related defects.

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  1. [14]1000 Genomes Project Consortium, Auton A, Brooks LD, et al. Nature. 2015;526(7571):68–74. PMC4750478 26432245

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Authors
Novice, T., Kariminia, A., Del Bel, K. L., Lu, H., Sharma, M., Lim, C. J., Read, J., Lugt, M. V., Hannibal, M. C., O’Dwyer, D., Hosler, M., Scharnitz, T., Rizzo, J. M., Zacur, J., Priatel, J., Abdossamadi, S., Bohm, A., Junker, A., Turvey, S. E., Schultz, K. R., & Rozmus, J.
Affiliations
  • University of Michigan (US)
  • BC Children's Hospital Research Institute (CA)
  • University of British Columbia (CA)
Corresponding author
Rozmus, Jacob
Venue
Journal of Clinical Immunology
Published
2019-12-19
Volume
40
Issue
2
Pages
267-276
ISSN
  • 0271-9142 (ISSN-L)
  • 1573-2592
OpenAlex
W2996427812
Cited by
44
References
38
Citations by year
2026: 2 · 2025: 6 · 2024: 7 · 2023: 8 · 2022: 8 · 2021: 9 · 2020: 4
FWCI
2.10
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Immunology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Child Health Clinician Scientist Program
  • Rare Disease Foundation
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunodeficiency and Autoimmune Disorders
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
Keywords
PLCγ2, C2 domain, germline missense mutation, gain-of-function mutations, autoinflammatory disease, common variable immunodeficiency, platelet hyperreactivity, B cell receptor signaling, calcium influx, ERK1/2 phosphorylation, phenotypic spectrum
MeSH terms
Protein Domains, B-Lymphocytes, Cell Line, Child, Child, Preschool, Female, Humans, Immunologic Deficiency Syndromes, Infant, Male, Phenotype, Autoimmunity, Common Variable Immunodeficiency, Germ-Line Mutation, Calcium Signaling, Mutation, Missense, Phospholipase C gamma

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