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Ectosomes as immunomodulators

delete2010-12-07
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OA
AI
S
Salima Sadallah
C
Ceylan Eken
J
Jürg A. Schifferli *
DOI:10.1007/s00281-010-0232-xdelete
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Abstract

Abstract

En 中文
Considerable progress has been made in recognizing microvesicles as important mediators of intercellular communication rather than irrelevant cell debris. Microvesicles released by budding directly from the cell membrane surface (i.e., ectocytosis) either spontaneously or in response to various stimuli are called shed vesicles or ectosomes. Ectosomes are rightside-out vesicles with cytosolic content, and they expose phosphatidylserine in the outer leaflet of their membrane. Depending on their cellular origin, ectosomes have been associated with a broad spectrum of biological activities. In the light of recent findings, we now know that ectosomes derived from polymorphonuclear leukocytes, erythrocytes, platelets, and tumor cells have profound effects on the innate immune system, as well as on the induction of the adaptive immunity, globally reprogramming cells such as macrophages or dendritic cells toward an immunosuppressive and possibly tolerogenic phenotype. Although the effects observed in the circulation are mainly procoagulant and pro-inflammatory, ectosomes might be anti-inflammatory/immunosuppressive in local inflammation.
Keywords:
Ectosomes
Microparticles
Shed vesicles
Inflammation
Immunosuppression

Journal

Seminars in Immunopathology cover
Seminars in Immunopathology
IF:
9.2
Papers:
1.0K
Citations:
6.0K

Organization

U
University of Basel
Scholars:
3.1W
Papers: 2.4W
Citations: 38
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