ArticleInflammation research : official journal of the European Histamine Research Society ... [et al.]2023
Exocytic machineries differentially control mediator release from allergen-triggered RBL-2H3 cells.
Article in Inflammation research : official journal of the European Histamine Research Society ... [et al.], 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed, 7 citations in OpenAlex.
- Biogenesis and homeostasis of mast cell lysosome related secretory granules.Frontiers in cell and developmental biology · 2025Review
- Dissecting SNARE-Mediated Exocytosis in RBL-2H3 Mast Cells.Methods in molecular biology (Clifton, N.J.) · 2025Article
- Engineering exosomes from fibroblast growth factor 1 pre-conditioned adipose-derived stem cells promote ischemic skin flaps survival by activating autophagy.Materials today. Bio · 2024Article
- Quercetin and Kaempferol inhibit HMC-1 activation via SOCE/NFATc2 signaling and suppress hippocampal mast cell activation in lipopolysaccharide-induced depressive mice.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2024Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
Abstract
backgroundMast cells utilize SNAREs (soluble-N-ethyl-maleimide sensitive factor attachment protein receptors) and SM (Sec1/Munc18) proteins to secrete/exocytose a variety of proinflammatory mediators. However, whether a common SNARE-SM machinery is responsible remains unclear.
methodsFour vesicle/granule-anchored SNAREs (VAMP2, VAMP3, VAMP7, and VAMP8) and two Munc18 homologs (Munc18a and Munc18b) were systematically knocked down or knocked out in RBL-2H3 mast cells and antigen-induced release of β-hexosaminidase, histamine, serotonin, and TNF was examined. Phenotypes were validated by rescue experiments. Immunofluorescence studies were performed to determine the subcellular distribution of key players.
resultsThe reduction of VAMP8 expression inhibited the exocytosis of β-hexosaminidase, histamine, and serotonin but not TNF. Unexpectedly, however, confocal microscopy revealed substantial co-localization between VAMP8 and TNF, and between TNF and serotonin. Meanwhile, the depletion of other VAMPs, including knockout of VAMP3, had no impact on the release of any of the mediators examined. On the other hand, TNF exocytosis was diminished specifically in stable Munc18b
conclusionDistinct exocytic pathways exist in mast cells for the release of different mediators.
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