Table 1.

Prevention of inflammatory bleeding by platelets

Bleeding phenotypeBleeding causePrimary pathways for bleeding preventionDispensable/secondary pathways for bleeding preventionReferences
100% platelets<2.5% platelets
Abnormal inflammatory bleeding       
 Immune complex-induced dermatitis (rpA) No bleeding Bleeding Neutrophils GPVI, (CLEC-2) GPIb, VWF, GPIIIbIIIa, (P2Y12), (TXA2), (PAR4), S1P, platelet granules 15, 20, 21, 32, 33, 34, 67, 92  
 Irritant contact dermatitis No bleeding Bleeding Neutrophils ND ND 15, 20  
 UVB-induced dermatitis No bleeding Bleeding Neutrophils ND ND 20  
 LPS-induced lung inflammation No bleeding Bleeding Neutrophils (GPVI), (CLEC-2) GPIIbIIIa, S1P, (P2Y12), (TXA2), (PAR4), platelet granules 15, 21, 32, 33, 63, 92  
Klebsiella-induced pneumonia No bleeding Bleeding ND ND ND 19  
 Immunization (OVA/CFA) No bleeding Bleeding Lymphocytes CLEC-2, podoplanin GPIIbIIIa, platelet S1P 21, 44  
 Immune complex-induced glomerulonephritis No bleeding Bleeding Neutrophils ND GPIb 25  
 Cerebral IRI (tMCAO) No bleeding Bleeding ND GPIIbIIIa, platelet granules GPVI, GPIb, VWF 15, 33, 48, 54, 55  
 Viral infection (LCMV) No bleeding Bleeding ND GPIIbIIIa GPIb, P-Selectin 16, 17, 18  
 Solid tumors (4T1, B16F10, LLC) No bleeding Bleeding Macrophages and neutrophils (Platelet granules) GPIb, VWF, GPIIIbIIIa 22, 23, 43  
No abnormal inflammatory bleeding       
 Arthritis No bleeding No bleeding NA NA NA 36, 37  
 Thioglycolate-induced peritonitis No bleeding No bleeding NA NA NA 2  
 Immune complex-induced peritonitis No bleeding No bleeding NA NA NA 34  
 Endotoxemia No bleeding No bleeding NA NA NA 35  
Bleeding phenotypeBleeding causePrimary pathways for bleeding preventionDispensable/secondary pathways for bleeding preventionReferences
100% platelets<2.5% platelets
Abnormal inflammatory bleeding       
 Immune complex-induced dermatitis (rpA) No bleeding Bleeding Neutrophils GPVI, (CLEC-2) GPIb, VWF, GPIIIbIIIa, (P2Y12), (TXA2), (PAR4), S1P, platelet granules 15, 20, 21, 32, 33, 34, 67, 92  
 Irritant contact dermatitis No bleeding Bleeding Neutrophils ND ND 15, 20  
 UVB-induced dermatitis No bleeding Bleeding Neutrophils ND ND 20  
 LPS-induced lung inflammation No bleeding Bleeding Neutrophils (GPVI), (CLEC-2) GPIIbIIIa, S1P, (P2Y12), (TXA2), (PAR4), platelet granules 15, 21, 32, 33, 63, 92  
Klebsiella-induced pneumonia No bleeding Bleeding ND ND ND 19  
 Immunization (OVA/CFA) No bleeding Bleeding Lymphocytes CLEC-2, podoplanin GPIIbIIIa, platelet S1P 21, 44  
 Immune complex-induced glomerulonephritis No bleeding Bleeding Neutrophils ND GPIb 25  
 Cerebral IRI (tMCAO) No bleeding Bleeding ND GPIIbIIIa, platelet granules GPVI, GPIb, VWF 15, 33, 48, 54, 55  
 Viral infection (LCMV) No bleeding Bleeding ND GPIIbIIIa GPIb, P-Selectin 16, 17, 18  
 Solid tumors (4T1, B16F10, LLC) No bleeding Bleeding Macrophages and neutrophils (Platelet granules) GPIb, VWF, GPIIIbIIIa 22, 23, 43  
No abnormal inflammatory bleeding       
 Arthritis No bleeding No bleeding NA NA NA 36, 37  
 Thioglycolate-induced peritonitis No bleeding No bleeding NA NA NA 2  
 Immune complex-induced peritonitis No bleeding No bleeding NA NA NA 34  
 Endotoxemia No bleeding No bleeding NA NA NA 35  

Overview of the experimental models of inflammation in which immunodepletion of platelets (<2.5% platelets) was reported to cause abnormal inflammatory bleeding or not. For each model, when known, the causes of inflammatory bleeding as well as the pathways involved or not for the prevention of bleeding are indicated. Candidate pathways whose role was investigated using platelet adoptive transfer methods based on platelet transfusion experiments are indicated in parentheses and italics.

IRI, ischemia-reperfusion injury; LCMV, lymphocytic choriomeningitis virus, not determined; LPS, lipopolysaccharide; NA, not applicable; OVA/CFA, ovalbumin/complete Freund's adjuvant; rpA, reverse passive Arthus reaction; tMCAO, transient middle cerebral artery occlusion.

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