Foreword - Lars-Inge Larsson.- 1 Regulation and control of cell-cell fusions, Lars-Inge Larsson.- 2 Retroviruses and cell fusions: overview, Anders L. Kjeldbjerg, Shervin Bahrami, Finn Skou Pedersen.- 3 Retroviral membrane fusions: regulation by proteolytic processing and cellular factors, Yoshinao Kubo.- 4 A comparative portrait of retroviral fusogens and syncytins, Philippe Pérot, Cécile Montgiraud, Dimitri Lavillette, François Mallet.- 5 Synctins : molecular aspects, Hungwen Chen, Mei-Leng Cheong .- 6 Role of the actin cytoskeleton within FuRMAS during Drosophila myoblast fusions and first functionally conserved factors in vertebrates, Susanne Filiz Önel, Christine Dottermusch, Angela Sickmann, Detlev Buttgereit, Renate Renkawitz-Pohl.- 7 Role of CD9 in sperm-egg fusion and its general role in fusion phenomena, Natsuko Kawano, Yuichiro Harada, Keiichi Yoshida, Mami Miyado, Kenji Miyado.- 8 Gemate binding and fusion, Young-Joo Yi, Shawn W. Zimmerman, Peter Sutovsky.- 9 Mechanisms regulating human trophoblast fusion, Berthold Huppertz, Martin Gauster.- 10 Macrophage fusion: the making of a new cell, Agnès Vignery.- 11 Molecules regulating macrophage fusions, Takeshi Miyamoto, Toshio Suda.- 12 Current progress towards understanding mechanisms of myoblast fusion in mammals, Grace K. Pavlath.- 13 The endogenous envelop protein synctin is involved in myoblast fusion, Bolette Bjerregaard, Jan Fredrik Talts, Lars-Inge Larsson.- 14 Cell Fusion and stem cells, Alain Silk, Anne E. Powell, Paige S. Davies, Melissa H. Wong.- 15 Cell Fusion and dendritic cell-based vaccines, Jianlin Gong, Shigeo Koido.- 16 Cancer cell fusion with myeloid cells: implications for energy metabolism in malignant hybrids, Rossitza Lazova, Ashok K. Chakraborty, John M. Pawelek.- 17 Cell-cell fusions and human endogenous retroviruses in cancer, Reiner Strick, Matthias W. Beckmann, Pamela L. Strissel.- Index.