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Lipid scrambling in immunology:why it is important

Cellular & Molecular Immunology 2023年第9期20卷 1081-1083页

作者： Ning Wu andréveillette The First Affiliated Hospital of Anhui Medical University Clinical Immunology InstituteAnhui Medical UniversityHefeiAnhuiChina Laboratory of Molecular Oncology Institut de recherches cliniques de Montréal(IRCM)MontréalQC H2W1R7Canada Department of Medicine University of MontréalMontréalQC H3T 1J4Canada Department of Medicine McGill UniversityMontréalQC H3G 1Y6Canada

Asymmetric lipid distribution in the plasma membrane(PM)is one of the fundamental features of living *** not only serve as structural components of the biophysical structure of the PM that preserves cell integrity but also participate directly in *** phospholipids(PLs),such as phosphatidylserine(PS),phosphatidylethanolamine(PE),and phosphoinositol(PI),are preferentially located in the inner layer of the PM,creating electrostatic charges for the docking of membrane-associated and cytoplasmic proteins carrying polybasic stretches of amino ***,there is emerging evidence that reversible changes in the distribution of these lipids take place in the PM and that these changes are critical for normal cell signaling,functions and homeostasis[1–3].They can also be implicated in the genesis of pathologies.

关键词： electrostatic reversible distribution

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Fyn Expression Predicates Both Protective Immunity and Onset of Autoimmunity

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Open Journal of Immunology 2015年第5期5卷 244-259页

作者： Behrouz Moemeni Nathalie Vacaresse Marina Vainder Michael E. Wortzman Tania H. Watts andré veillette Thomas F. Gajewski Michael Julius Sunnybrook Research Institute Toronto Canada Department of Immunology University of Toronto Toronto Canada Laboratory of Molecular Oncology Clinical Research Institute of Montreal Montreal Canada Department of Pathology University of Chicago Chicago IL USA

Genomic disruption of Fyn has not been associated with an immune-deficient phenotype, notwithstanding the profound impairment in IL-2 production by T cells derived from Fyn-deficient animals observed in vitro. The results presented demonstrate that Fyn deficient animals succumb to influenza infection ahead of the protective expansion of lung infiltrating T cells and viral clearance observed in wild-type hosts. Formal proof that Fyn-dependent IL-2 production mediates T cell expansion in vivo is provided using a model of T cell induced enteropathy. Specifically, Fyn deficient naive T cells do not induce colitis in SCID animals due to their lack of expansion, and Fyn re-expression rescues both IL-2 production and its capacity to support in vivo expansion leading to colitis. These results reconcile the obligatory role of Fyn in T cell activation and autocrine IL-2 supported growth;and underscore the mechanism through which its function is integrated with and regulated by Lck.

关键词： Fyn Lck TcR Signaling Immunity Autoimmunity

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