Cited by 476T-cell and B-cell ImmunologyImmunodeficiency and Autoimmune DisordersMonoclonal and Polyclonal Antibodies Research

Phospholipase Cγ2 Is Essential in the Functions of B Cell and Several Fc Receptors

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Wang, Demin, Feng, Jian, Wen, Renren, Marine, Jean-Christophe, Sangster, Mark Y., Parganas, Evan, Hoffmeyer, Angelika, Jackson, Carl W. +3 more·2000·Immunity

Abstract

Many receptors activate phospholipase Cgamma1 or -gamma2. To assess the role of PLCgamma2, we derived enzyme-deficient mice. The mice are viable but have decreased mature B cells, a block in pro-B cell differentiation, and B1 B cell deficiency. IgM receptor-induced Ca2+ flux and proliferation to B cell mitogens are absent. IgM, IgG2a, and IgG3 levels are reduced, and T cell-independent antibody production is absent. The similarity to Btk- or Blnk-deficient mice demonstrates that PLCgamma2 is downstream in Btk/Blnk signaling. FcRgamma signaling is also defective, resulting in a loss of collagen-induced platelet aggregation, mast cell FcepsilonR function, and NK cell FcgammaRIII and 2B4 function. The results define a signal transduction pathway broadly utilized by immunoglobulin superfamily receptors.

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Crossref · 10.1016/s1074-7613(00)00005-4

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53 of 53 references verified0 citation errors · 0 not checkable

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  • A previous study reported marked decreases in the most mature B cell population in Plcg2 deficient mice.

    “In fact, a previous study reported marked decreases in the most mature B cell population in Plcg2 deficient mice(30).”
  • Previous studies have reported internal hemorrhaging during development in other Plcg2 deficient mouse models, which have been proposed to be caused by rupture of blood-filled fragile lymphatic vessels by mechanical stress or pressure of the blood flow.

    “Previous studies have reported internal hemorrhaging during development in other Plcg2 deficient mouse models (29, 30), which have been proposed to be caused by rupture of blood-filled fragile lymphatic vessels by mechanical stress or pressure of the blood flow (29).”
  • PLCγ2 is primarily expressed in lymphoid tissue (bone marrow, thymus, spleen and lymph nodes), where it functions immediately downstream of the B-cell receptor (BCR) and other ITAM-coupled receptors.

    “PLCγ2 is primarily expressed in lymphoid tissue (bone marrow, thymus, spleen and lymph nodes), where it functions immediately downstream of the B-cell receptor (BCR) and other ITAM-coupled receptors [22–24].”
  • In peripheral immune cells, PLCγ2 is implicated in signaling downstream of the B cell receptor and is thought to modulate macrophages, platelets, mast cells, neutrophils, and NK cells through the Fc receptor.

    “In peripheral immune cells, PLCγ2 has been implicated in signaling pathways downstream of the B cell receptor, and it is thought to modulate the functions of macrophages, platelets, mast cells, neutrophils, and NK cells through the Fc receptor [14].”
  • In different models of PLCG2 depletion, homozygous knockout embryos were found to have significant subcutaneous hemorrhaging, suggesting impacted vascular development and bleeding that may underlie embryonic death and reduced frequencies at weaning.

    “In different models of PLCG2 depletion, homozygous knockout embryos were found to have significant subcutaneous hemorrhaging, suggesting impacted vascular development and bleeding that may underlie embryonic death and reduced frequencies at weaning.”

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Authors
Wang, D., Feng, J., Wen, R., Marine, J.-C., Sangster, M. Y., Parganas, E., Hoffmeyer, A., Jackson, C. W., Cleveland, J. L., Murray, P. J., & Ihle, J. N.
Affiliations
St. Jude Children's Research Hospital (US)
Corresponding author
Ihle, James N.
Venue
Immunity
Publisher
Elsevier BV
Published
2000-07
Volume
13
Issue
1
Pages
25-35
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2039490597
Cited by
475
References
54
Citations by year
2026: 7 · 2025: 8 · 2024: 5 · 2023: 12 · 2022: 4 · 2021: 13 · 2020: 11 · 2019: 10 · 2018: 6 · 2017: 10 · 2016: 12 · 2015: 16 · 2014: 12 · 2013: 14 · 2012: 16
FWCI
12.85
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (P01HL053749, P01HL53749)
  • National Cancer Institute (CA21765, P30CA021765)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01-DK42932, R01DK042932)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunodeficiency and Autoimmune Disorders
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
Keywords
PLCγ2, B cell development, calcium flux, BTK signaling, 2B4, immunoglobulin superfamily receptors, platelet aggregation
MeSH terms
Agammaglobulinaemia Tyrosine Kinase, Animals, B-Lymphocytes, Blood Platelets, Carrier Proteins, Hematopoiesis, Isoenzymes, Mice, Inbred C57BL, Type C Phospholipases, Phosphoproteins, Protein-Tyrosine Kinases, Receptors, Antigen, B-Cell, Receptors, IgG, Mice, Knockout, Adaptor Proteins, Signal Transducing, Mice, Phospholipase C gamma

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