This monograph is dedicated to one of the discoverers of poly(ADP- ribose), Professor Paul Mandel, from the Centre de Neurochimie in Strasbourg. We would like to congratulate him for his distinguished contributions to the field of poly(ADP-ribosyl)ation and express our gratitude for his support in the last years and particularly for his encouragement for the organization of this meeting. Poly(ADP-ribose) was discovered more than 25 years ago. Since then, excellent progress has been made on the study of the mechanisms of poly(ADP- ribose) reaction. The last five years have been particularly...