This report on Future Trends in Inflammation IV records another of the multidisciplinary meetings organized by the European Biological Research Association. The organizers wish to record their thanks to all the participants and delegates who made this such an enjoyable meeting. Our thanks are due to a number of members of the pharmaceutical industry who so kindly donated funds. These funds were used to provide grants for young research workers to attend this meeting. Many people have kindly given their time and help to make this congress possible. It is impossible to list them by name, but we are profoundly grateful. We were dubious at the outset as to whether to hold this meeting in a period when many other meetings are being organized on inflammation. The enthusiastic attendance proves that we were right in going ahead. The next international meeting will be held in France in 1983. For further details please contact: Professor J. P. Giroud Department of Pharmacology, Hopital Cochin 75014 Paris, France D. A. Willoughby J. P. Giroud xxxiii Section I Future Trends CHAIRMAN: L. Chedid CO-CHAIRMAN: Dame Honor Fell 1 The participation of mononucleur phagocytes in immune based inflammatory processes with special reference to their secretory responses P. DAVIES AND R. J.