Cited by 35Lymphoma Diagnosis and TreatmentT-cell and B-cell ImmunologyAcute Lymphoblastic Leukemia research

Essential Role of Phospholipase Cγ2 in Early B-Cell Development and Myc-Mediated Lymphomagenesis

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Wen, Renren, Chen, Yuhong, Bai, Li, Fu, Guoping, Schuman, James, Dai, Xuezhi, Zeng, Hu, Yang, Chunying +3 more·2006·Molecular and Cellular Biology

Abstract

Phospholipase Cgamma2 (PLCgamma2) is a critical signaling effector of the B-cell receptor (BCR). Here we show that PLCgamma2 deficiency impedes early B-cell development, resulting in an increase of B220+ CD43+ BP-1+ CD24hi pre-BCR+ large pre-B cells. PLCgamma2 deficiency impairs pre-BCR-mediated functions, leading to enhanced interleukin-7 (IL-7) signaling and elevated levels of RAGs in the selected large pre-B cells. Consequently, PLCgamma2 deficiency renders large pre-B cells susceptible to transformation, resulting in dramatic acceleration of Myc-induced lymphomagenesis. PLCgamma2(-/-) Emu-Myc transgenic mice mainly develop lymphomas of B220+ CD43+ BP-1+ CD24hi pre-BCR+ large pre-B-cell origin, which are uncommon in wild-type Emu-Myc transgenics. Furthermore, lymphomas from PLCgamma2(-/-) Emu-Myc transgenic mice exhibited a loss of p27Kip1 and often displayed alterations in Arf or p53. Thus, PLCgamma2 plays an important role in pre-BCR-mediated early B-cell development, and its deficiency leads to markedly increased pools of the most at-risk large pre-B cells, which display hyperresponsiveness to IL-7 and express high levels of RAGs, making them prone to secondary mutations and Myc-induced malignancy.

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Crossref · 10.1128/mcb.00839-06

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  • PLCγ2 is vital to early B cell development, as shown by accumulation of large pre-B cells in the Eμ-Myc lymphomagenesis mouse model in the absence of PLCγ2.

    “Using this Eμ-Myc lymphomagenesis mouse model in the absence of PLCγ2 demonstrated that PLCγ2 was indeed vital to early B cell development, resulting in an accumulation of large pre-B cells (121).”
  • PLCγ2 deficiency affects the functionality of pre-BCR, resulting in increased IL-7 signaling and upregulation of RAG recombinase in selected large pre-B cells, leaving them vulnerable to transformation and accelerating c-myc-mediated lymphomagenesis.

    “PLCγ2 deficiency affects the functionality of pre-BCR, resulting in increased IL-7 signaling and upregulation of the RAG recombinase in selected large pre-B cells, thus leaving them vulnerable to transformation and accelerating c-myc-mediated lymphomagenesis (121).”

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Authors
Wen, R., Chen, Y., Bai, L., Fu, G., Schuman, J., Dai, X., Zeng, H., Yang, C., Stephan, R. P., Cleveland, J. L., & Wang, D.
Affiliations
  • Versiti Blood Center of Wisconsin (US)
  • St. Jude Children's Research Hospital (US)
  • University of Alabama (US)
  • Medical College of Wisconsin (US)
Corresponding author
  • Wen, Renren
  • Wang, Demin
Venue
Molecular and Cellular Biology
Published
2006-12-01
Volume
26
Issue
24
Pages
9364-9376
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2161911875
Cited by
34
References
73
Citations by year
2026: 2 · 2023: 1 · 2022: 2 · 2021: 2 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 4 · 2013: 1 · 2012: 3
FWCI
1.64
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (R01HL073284)
  • National Cancer Institute (R01 CA76379, R01CA076379, CA21765, P30CA021765)
  • National Institute of Allergy and Infectious Diseases (R01AI052327, R01 AI52327)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Acute Lymphoblastic Leukemia research
Keywords
PLCγ2, early B cell development, pre-B cells, RAG genes, Eμ-myc transgenic mice, p27, ARF, p53, B cell receptor signaling, lymphoma transformation
MeSH terms
Animals, B-Lymphocytes, Cell Differentiation, Isoenzymes, Lymphoma, Membrane Glycoproteins, Mice, Inbred C57BL, Mice, Transgenic, Receptors, Antigen, B-Cell, Proto-Oncogene Proteins c-myc, Mice, Knockout, Mice, Phospholipase C gamma, Pre-B Cell Receptors

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