Ten years ago interest in leukocyte chemotaxis was restricted to a
relatively small group of scientists whose interests were quite
circumscribed. In the past decade both the number of workers and their
publications has grown at some- thing approaching an exponential rate
and, more importantly, the field has gradually expanded to encompass a
large number of diverse areas (mediators, receptors, cell effector
mechanisms, regulatory factors, etc.). It is now apparent that
leukocytes are particularly useful for studies of the locomotory
behavior of all cell types and of mechanisms controlling cell movement
and orientation. Chemotactic factors, once discovered as substan- ces
able to induce directional migration in leukocytes, are now recognized
as potent stimulators of a variety of cell functions. Based on our
knowledge in the field of basic research in leuko- cyte chemotaxis,
clinical observations in combination with ex- perimental studies in vivo
have provided new insights into the role of leukocyte-mediator
interactions. The recognition that a specific interaction between
chemotactic factor and leukocyte can lead to a multitude of cellular
responses and products has opened up a broad area of study. The
diversity of contributions to this volume based on a conference which
was held in May 1982 in Gersau, Switzerland, reflects this development
and demonstra- tes that leukocyte chemotaxis continues to be an area of
fasci- nating and highly active research.