This volume contains the proceedings of the sixth Colloque M6decine et Re- cherche organized by the Fondation Ipsen pour la Recherche Therapeutique and devoted to Alzheimer's disease. It was held in Strasbourg on April 25, 1990 and dedicated to growth factors and Alzheimer's disease. The proceedings of the previous meetings were published as the present one in the same series: Immunology and Alzheimer's disease (A. Pouplard-Barthelaix, J. Emile, Y Christen eds., 1988), Genetics and Alzheimer's disease (P.-M. Sinet, Y Lamour, Y Christen eds., 1988), Neuronal grafting and Alzheimer's disease (F. Gage, A. Privat, Y Christen eds., 1989), Biological markers and Alzheimer's disease (F. Boller, R. Katzman, A. Rascol, J.-L. Signoret, Y Christen eds., 1989), Imaging, cerebral topography and Alzheimer's disease (S. I. Rapoport, H. Petit, D. Leys, Y Christen eds., 1990). The next meeting of the series entitled Neurophilosophy and Alzheimer's disease was being held in La Jolla (California, USA) on January 11,1991. The proceed- ings will be published this year. Yves Christen Fondation Ipsen Acknowledgements. The editors wish to express their gratitude to M. Sensenbren- ner (Strasbourg), A. Bjorklund (Lund), R. Terry (La Jolla) for their collaboration as chairmen for the meeting, G. Vincendon, dean of the Facult6 de M6decine de Strasbourg, who made the introductive talk, Mary Lynn Gage for her editorial assistance and Jacqueline Mervaillie for the organization of the meeting. Contents Neurotrophic Factors and Neurodegenerative Diseases F Hefti and B. Knusel ...