Abstract:
:Antibodies can have a protective but non-essential role in natural chlamydial infections dependent on antigen specificity and antibody isotype. IgG is the dominant antibody in both male and female reproductive tract mucosal secretions, and is bi-directionally trafficked across epithelia by the neonatal Fc receptor (FcRn). Using pH-polarized epididymal epithelia grown on Transwells, IgG specifically targeted at an extracellular chlamydial antigen; the major outer membrane protein (MOMP), enhanced uptake and translocation of infection at pH 6-6.5 but not at neutral pH. This was dependent on FcRn expression. Conversely, FcRn-mediated transport of IgG targeting the intracellular chlamydial inclusion membrane protein A (IncA), induced aberrant inclusion morphology, recruited autophagic proteins independent of lysosomes and significantly reduced infection. Challenge of female mice with MOMP-specific IgG-opsonized Chlamydia muridarum delayed infection clearance but exacerbated oviduct occlusion. In male mice, MOMP-IgG elicited by immunization afforded no protection against testicular chlamydial infection, whereas the transcytosis of IncA-IgG significantly reduced testicular chlamydial burden. Together these data show that the protective and pathological effects of IgG are dependent on FcRn-mediated transport as well as the specificity of IgG for intracellular or extracellular antigens.
journal_name
Immunol Cell Bioljournal_title
Immunology and cell biologyauthors
Armitage CW,O'Meara CP,Harvie MC,Timms P,Blumberg RS,Beagley KWdoi
10.1038/icb.2013.110subject
Has Abstractpub_date
2014-05-01 00:00:00pages
417-26issue
5eissn
0818-9641issn
1440-1711pii
icb2013110journal_volume
92pub_type
杂志文章abstract::Activin A, a member of the transforming growth factor-β superfamily, is a critical early mediator of acute inflammation. Activin A release coincides with the release of tumour necrosis factor-α (TNF-α) in models of lipopolysaccharide (LPS)-induced inflammation. The source of circulating activin A during acute inflamma...
journal_title:Immunology and cell biology
pub_type: 杂志文章
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journal_title:Immunology and cell biology
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journal_title:Immunology and cell biology
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journal_title:Immunology and cell biology
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1111/imcb.12252
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1991.3
更新日期:1991-02-01 00:00:00
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journal_title:Immunology and cell biology
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abstract::Allergic asthma is responsible for widespread morbidity and mortality and its incidence has increased dramatically in industrialized countries over the past two decades. Here, we describe a new murine model of allergic asthma utilizing a novel allergen with intrinsic enzymatic activity similar to that reported for man...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1111/j.1440-1711.2004.01303.x
更新日期:2005-02-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1992.15
更新日期:1992-04-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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更新日期:1987-10-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.2010.53
更新日期:2010-08-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1990.52
更新日期:1990-12-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1993.1
更新日期:1993-02-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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journal_title:Immunology and cell biology
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journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
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更新日期:1997-10-01 00:00:00
abstract::CD4 T cells play a key role in immunological memory. We have demonstrated that professional memory CD4 T cells reside and rest in the bone marrow (BM). However, the molecular mechanisms of their establishment in the BM and their maintenance remain unclear. We here show that memory CD4 T cells express high levels of CD...
journal_title:Immunology and cell biology
pub_type: 杂志文章
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更新日期:2013-09-01 00:00:00
abstract::The cellular effects of biodiesel emissions particulate matter (BDEP) and petroleum diesel emissions particulate matter (PDEP) were compared using a human airway cell line, A549. At concentrations of 25 microg/ml, diesel particulate matter induced the formation of multinucleate cells. In cells treated with a mixture o...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/sj.icb.7100109
更新日期:2007-11-01 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章,评审
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更新日期:2020-07-16 00:00:00
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journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/icb.1991.59
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journal_title:Immunology and cell biology
pub_type: 杂志文章
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更新日期:2018-04-01 00:00:00
abstract::B and T lymphocyte attenuator (BTLA) is an important negative regulator of T-cell activation. T-cell activation involves partitioning of receptors into discrete membrane compartments known as lipid rafts and the formation of an immunological synapse (IS) between the T cell and antigen-presenting cell (APC). Here we sh...
journal_title:Immunology and cell biology
pub_type: 杂志文章
doi:10.1038/sj.icb.7100087
更新日期:2007-11-01 00:00:00