Thromb Haemost 1994; 72(03): 450-456
DOI: 10.1055/s-0038-1648888
Original Article
Schattauer GmbH Stuttgart

Polymorphonuclear Leukocyte-Platelet Interaction: Role of P-Selectin in Thromboxane B2 and Leukotriene C4 Cooperative Synthesis

Norma Maugeri
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Virgilio Evangelista
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Antonio Celardo
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Giuseppe Dell’Elba
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Nicola Martelli
1  Laboratory of Tumor and Vascular Cell Biology, Istituto di Ricerche Farmacologiche Mario Negri, Consorzio Mario Negri Sud, Santa Maria Imbaro, Italy
,
Paola Piccardoni
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Glovanni de Gaetano
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
,
Chiara Cerletti
Giulio Bizzozero Laboratory of Platelet and Leukocyte Pharmacology, Italy
› Author Affiliations
Further Information

Publication History

Received 13 December 1993

Accepted after resubmission 18 May 1994

Publication Date:
25 July 2018 (online)

Summary

In PMN/platelet suspensions stimulated by fMLP giant mixed aggregates are formed and TxB2 and LTC4 are synthesized as the result of the cooperation in the arachidonic acid (AA) metabolism during cell/cell contact. PMN-derived cathepsin G induced the expression of P-selectin on platelet surface. GE12, an antibody against P-selectin, significantly reduced mixed cell aggregates. GE12 did not affect platelet aggregation induced by PMN-derived supernatants, indicating that the inhibitory effect of GE12 on mixed cell aggregation depends on inhibition of PMN/platelet adhesion. GE12 significantly reduced TxB2 and LTC4 production in PMN/platelet mixed cell suspensions stimulated by fMLP. As previously reported, synthesis of 3H-TxB2 in 3H-AA-labeled PMN/unlabeled platelets indicates that platelets utilize 3H-AA from PMN. 3H-LTC4 production in unlabeled PMN/3H-AA-labeled platelets indicates that bidirectional routes are utilized in this system for LTC4 synthesis. GE12 significantly reduced 3H-TxB2 and 3H-LTC4 synthesis. These results show that cathepsin G released by activated PMN induces the expression of P-selectin on platelet membrane: this adhesive glycoprotein modulates cell-cell contact and transcellular metabolism of AA.