Prostaglandins and leucotaxis.

Freshly prepared solutions of prostaglandin E1 exhibit chemotactic activity against rabbit polymorphonuclear leucocytes harvested from the peritoneal cavity but are devoid of such activity either against similar cells obtained from the rat or against polymorphonuclear leucocytes obtained from the blood of the rabbit, rat and man. Some implications of these findings with respect to the development of inflammatory responses and the mode of action of non-steroidal acidic anti-inflammatory drugs are discussed.