Journal
SEMINARS IN IMMUNOLOGY
Volume 25, Issue 6, Pages 425-429Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.smim.2013.10.007
Keywords
IL-1 beta; Inflammasome; Leaderless secretion; Secretory lysosomes; Microvesicles; Autophagy
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Funding
- Compagnia di San Paolo and Ricerca Corrente by Italian Health Ministry
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Unlike most cytokines, IL-1 beta lacks a secretory signal sequence raising the question of how is this cytokine processed and delivered outside the producing cells. After the seminal observation that IL-1 beta is actively secreted by human monocytes through a route alternative to the classic endoplas mic reticulum-Golgi, several different pathways have been proposed for IL-1 beta ecretion in different cell types and culture conditions, some of which are unique to macrophage cell lines. Here we describe the most credited of these pathways. In particular, we will focus on IL-1 beta secretion from primary human blood monocytes. In fact, although data from macrophages or macrophage cell lines are predominant, secretion of IL-1 beta by monocytes is the most clinically relevant. (C) 2013 Elsevier Ltd. All rights reserved.
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