Molecular mechanisms of human skin connective tissue aging / Taihao Quan -- Skin aging and skin disorders (myo) fibroblasts extracellular matrix in skin wound and aging / Dorothée Girard, Betty Laverdet and Alexis Desmouliére -- Changes of skin barrier with aging / Eung Ho Choi -- Skin dryness is a factor that accelerates collagen degradation and results in wrinkling / Hitoshi Masaki -- CCN family proteins in skin connective tissue aging / Taihao Quan -- Fibroblasts as drivers of healing and cancer progression : from in vitro experiments to clinics / Eliska Krejcí [and 8 others] -- Mitochondrial DNA common deletion in human skin connective tissue aging / Chunji Quan -- Nanodermatology : nanoscale therapeutics for topical application / Angelo Landriscina, Jamie Rosen and Adam J. Friedman -- Skin conditions in elderly / Aleksandar Godic -- Regenerative properties of laser light / Nicolette Nadene Houreld -- Aging skin : a window to the body / Georgios Nikolakis, Evgenia Makrantonaki and Christos C. Zouboulis -- Skin aging with a focus on the cornified envelope / Mark Rinnerthaler, Maria Karolin Streubel and Klaus Richter