Ultrasensitive quantification of TAP-dependent antigen compartmentalization in scarce primary immune cell subsets.
Ultrasensitive quantification of TAP-dependent antigen compartmentalization in scarce primary immune cell subsets.
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DOI:
10.1038/ncomms7199
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发表时间:
2015-02-06
影响因子:
16.6
通讯作者:
Tampe, Robert
中科院分区:
文献类型:
--
作者:
Fischbach, Hanna;Doering, Marius;Nikles, Daphne;Lehnert, Elisa;Baldauf, Christoph;Kalinke, Ulrich;Tampe, Robert
Presentation of peptides on major histocompatibility complex class I (MHC I) is essential for the establishment and maintenance of self-tolerance, priming of antigen-specific CD8+ T cells and the exertion of several T-cell effector functions. Cytosolic proteasomes continuously degrade proteins into peptides, which are actively transported across the endoplasmic reticulum (ER) membrane by the transporter associated with antigen processing (TAP). In the ER lumen antigenic peptides are loaded onto MHC I, which is displayed on the cell surface. Here we describe an innovative flow cytometric approach to monitor time-resolved ER compartmentalization of antigenic peptides. This assay allows the analysis of distinct primary human immune cell subsets at reporter peptide concentrations of 1 nM. Thus, this ultrasensitive method for the first time permits quantification of TAP activity under close to physiological conditions in scarce primary cell subsets such as antigen cross-presenting dendritic cells. Antigenic peptides are loaded into major histocompatibility complex class I (MHC I) molecules after entering the ER via the TAP transporter. Here, Fischbach et al. develop a flow cytometry assay to monitor TAP-dependent peptide translocation that is sensitive enough to use on scarce primary cell subsets.
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DOI:
10.1084/jem.20121103
发表时间:
2013-05-06
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Segura E;Durand M;Amigorena S
通讯作者:
Amigorena S
影响因子:
32.4
作者:
Koopmann, JO;Albring, J;Momburg, F
通讯作者:
Momburg, F
影响因子:
4
作者:
Ghanem, Esther;Fritzsche, Susanne;Springer, Sebastian
通讯作者:
Springer, Sebastian
影响因子:
15.9
作者:
Gehring, Adam J.;Haniffa, Muzlifah;Bertoletti, Antonio
通讯作者:
Bertoletti, Antonio
影响因子:
3.2
作者:
SALTER, RD;HOWELL, DN;CRESSWELL, P
通讯作者:
CRESSWELL, P