Table 3. PMP involvement in inflammation .
PMP’s inflammatory mediator | Target cell | Outcome of interaction | References |
RANTES (CCL5) | Monocytes Activated endothelial cells |
Vascular wall infiltration | 16,96 |
Stimulating chemotactic motility | |||
Inducing monocytic arrest on endothelial cells | |||
AA | Monocyte – Endothelial cells | Activation of PKC | 97 |
Increased adherence between monocytes and endothelial cells | |||
Increased chemotaxis of U-937 promonocytic cell line | |||
CD41 and CD62P | Endothelial cells | Endothelial cell activation | 11 |
PS | Macrophages Dendritic cells |
Neutralizing dendritic cells and macrophages phagocytic activity | 98 |
Phosphatidylserine, GPIIb/IIIa, P-selectin | Monocytes | Activating monocytes | 99 |
Protumorigenic effect | |||
Upregulating phagocyte markers expression | |||
PPARγ/RXR complex | THP-1 monocytic cell line | Aggregation of THP-1 cells | 100 |
Producing TF+ monocytic MVs | |||
Modifying gene expression | |||
miR 126-3p | Macrophages | Inducing phagocytic phenotype | 101 |
Downregulation of cytokine/chemokine secretion | |||
Induced monocyte differentiation to M2 macrophage | |||
PS? | Macrophages | Reduced release of TNF-ɑ and IL-10 | 98 |
Immediately induced release of TGF-β from macrophage | |||
AA | U-937 (promonocytic cell line) | Increased Mac-1 and ITGAL (integrin subunit alpha L) expression | 66,102,103 |
Increased chemotaxis | |||
AA | Endothelial cells Monocytes |
Expression of thromboxane A2 and COX-2 in endothelial cells | 66,102 |
Facilitating platelet aggregation | |||
Facilitating monocyte-EC interaction | |||
Mitochondria | Leukocytes | Hydrolysis of mitochondrial membrane by sPLA2-IIA producing inflammatory mediators which promote leukocyte activation | 32,84 |
CD154 (CD40 L) | B cells | Switch of antigen-specific IgG secretion | 56 |
CD154 (CD40 L) | Monocytes | Increased inflammatory signals (IL1β, TNFα, MCP1) | 49,104,105 |
Stimulating monocyte-derived dendritic cells maturation | |||
miR-183 | NK cells | Knockdown of NK activation adapter DAP12 | 91,106,107 |
Suppressing NK cell inflammatory response to tumor | |||
TGFβ1 | CD4+ T Cells | Increased TGFβ1 production | 108 |
Increased differentiation of CD4+ naive Tcells to FOXP3+ regulatory Tcells | |||
PF4(CXCL4) | CD4+ T Cells | Anti-inflammatory effect through reducing IFNγ, IL6, TNFα expression | 109 |
PF4(CXCL4) | Treg cells | Treg stability in an inflammatory environment | 110 |
CXCR3-mediated signaling in activated T cells | |||
Negative regulator of TH17 differentiation | |||
P-selectin | Treg cells | Treg stability in an inflammatory environment | 110 |
PMP adhesion to Tregs through PSGL-1 | |||
Prevention of peripheral blood–derived Tregs differentiation into IL-17– and IFN-γ producing cells | |||
P-Selectin | Neutrophils | Triggering neutrophil activation, aggregation and phagocytosis | 111 |
Inducing adhesion to the endothelium | |||
GPIbα | Neutrophils (β2 integrin Mac 1 (CD11b/CD18) | Neutrophil activation | 49,111 |
GPIIb/IIIa receptors | Neutrophils | Transferring GPIIb/IIIA to neutrophils participating in NFkB activation of neutrophils | 112 |
sPLA2-IIA and 12-lipoxygenase | Neutrophils | Promoting PMP internalization | 113,114 |
Enhancing inflammation | |||
β defensin 1 | Neutrophils | NETosis (neutrophil extracellular traps) Cancer associated thrombosis |
49,115 |
PMP-miRNAs | Neutrophils | Not clear | 16 |
PMPs miRNAs released from collagen-activated platelets | Leukocytes | Stimulating cytokine responses | 115,116 |
Regulating cytokines release | |||
12-lipoxygenase | Mast cells | Negative inflammatory regulator | 60 |
Abbreviations: PMP, platelet microparticles; N/A ,Not applicable; MVs, microvesicles; AA, Arachidonic acid; COX-2, cyclooxygenase-2; EC, Endothelial cell; sPLA2-IIA, secretory Phospholipase A2 group IIA; IgG, Immunoglobulin G; TNFα, tumor necrosis factor alpha; MCP1, monocyte chemoattractant protein-1; NK cells, Natural killer cells; IFNγ, Interferon gamma; Treg cells, T regulatory cells; TH, T helper cells.