ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Critical Reviews™ in Immunology
インパクトファクター: 1.404 5年インパクトファクター: 3.347 SJR: 0.706 SNIP: 0.55 CiteScore™: 2.19

ISSN 印刷: 1040-8401
ISSN オンライン: 2162-6472

巻:
巻 40, 2020 巻 39, 2019 巻 38, 2018 巻 37, 2017 巻 36, 2016 巻 35, 2015 巻 34, 2014 巻 33, 2013 巻 32, 2012 巻 31, 2011 巻 30, 2010 巻 29, 2009 巻 28, 2008 巻 27, 2007 巻 26, 2006 巻 25, 2005 巻 24, 2004 巻 23, 2003 巻 22, 2002 巻 21, 2001 巻 20, 2000 巻 19, 1999 巻 18, 1998 巻 17, 1997 巻 16, 1996 巻 15, 1995 巻 14, 1994

Critical Reviews™ in Immunology

DOI: 10.1615/CritRevImmunol.v27.i4.60
pages 367-397

Regulation of aicda Expression and AID Activity: Relevance to Somatic Hypermutation and Class Switch DNA Recombination

Zhenming Xu
Institute for Immunology, School of Medicine and School of Biological Sciences, University of California, Irvine, CA 92697-4120, USA
Egest J. Pone
Institute for Immunology, School of Medicine and School of Biological Sciences, University of California, Irvine, CA 92697-4120, USA
Ahmed Al-Qahtani
Institute for Immunology, School of Medicine and School of Biological Sciences, University of California, Irvine, CA 92697-4120, USA
Seok-Rae Park
Center for Immunology, School of Medicine and School of Biological Sciences, University of California, Irvine, CA 92697-4120, USA
Hong Zan
Institute for Immunology, School of Medicine and School of Biological Sciences, University of California, Irvine, CA 92697-4120, USA
Paolo Casali
Department of Microbiology and Immunology, School of Medicine University of Texas Health Science Center, 7703 Floyd Curl Drive San Antonio, Texas 78229, USA

要約

Expression and activity of activation-induced cytidine deaminase (AID) encoded by the aicda gene are essential for immunoglobulin (Ig) gene somatic hypermutation (SHM) and class switch DNA recombination (CSR). SHM and CSR unfold, in general, in germinal centers and/are central to the maturation of effective antibody responses. AID expression is induced by activated B-cell CD40 signaling, which is critical for the germinal center reaction, and is further enhanced by other stimuli, including interleukin-4 (IL-4) secreted from CD4+ T cells or Toll-like receptor (TLR)-activating bacterial and/or viral molecules. Integration of different intracellular signal transduction pathways, as activated by these stimuli, leads to a dynamic aicda-regulating program, which involves both positively acting trans-factors, such as Pax5, HoxC4, E47, and Irf8, and negative modulators, such as Blimp1 and Id2, to restrict aicda expression primarily to germinal center B cells. The phosphatidylinositol 3-kinase (PI 3-K), which functions downstream of activated B-cell receptor (BCR) signaling, likely plays an important role in triggering the downregulation of aicda expression in postgerminal center B cells and throughout plasmacytoid differentiation. In B cells undergoing SHM and CSR, AID activity, and, possibly, AID targeting to the Ig locus are regulated at a posttranslational level, including AID dimerization/oligomerization, nuclear/cytoplasmic AID translocation, and phosphorylation of the AID Ser38 residue by protein kinase A (PKA). Here, we discuss the role of B-cell activation signals, transcription regulation programs, and posttranslational modifications in controlling aicda expression and AID activity, thereby delineating an integrated model of modulation of SHM and CSR in the germinal center reaction.


Articles with similar content:

Effect of Age on the Immunoglobulin Class Switch
Critical Reviews™ in Immunology, Vol.24, 2004, issue 5
Richard L. Riley, Bonnie B. Blomberg, Daniela Frasca
Toll-Like Receptors and B-Cell Receptors Synergize to Induce Immunoglobulin Class-Switch DNA Recombination: Relevance to Microbial Antibody Responses
Critical Reviews™ in Immunology, Vol.30, 2010, issue 1
Ahmed Al-Qahtani, Egest J. Pone, Paolo Casali, Jing-Song Zhang, Hong Zan, Zhenming Xu
CREB-Mediated Transcriptional Control
Critical Reviews™ in Eukaryotic Gene Expression, Vol.9, 1999, issue 1
Ourania M. Andrisani
Cyclins, Cyclin-Dependent Kinases and Cdk Inhibitors: Implications in Cell Cycle Control and Cancer
Critical Reviews™ in Eukaryotic Gene Expression, Vol.5, 1995, issue 2
Antonio Giordano, Timothy K. MacLachlan, Nianli Sang
The p53 Transcriptional Network Influences Microglia Behavior and Neuroinflammation
Critical Reviews™ in Immunology, Vol.35, 2015, issue 5
Wei Su, Gwenn A. Garden, Macarena S. Aloi