[Autoradiographic investigation into the influence of factor XIII on wound healing in the animal experiment (author's transl)].

1. In Wistar rats pretreated with factor XIII, placebo (human albumin solution), or physiological saline, a muscle wound was produced. For pre- and postlabelling purposes the animals received 3H-thymidine. 2. Autoradiographic and histological examinations revealed wound healing promoting activity of factor XIII from 72 h post operationem onwards. 3. 7 days after surgery, in contrast to the controls, the animals pretreated with factor XIII displayed sturdy, directed connective tissue in the wound bed with ample vascularization. 4. The method with pre- and postlabelling with 3H-thymidine elucidates that wound healing through factor XIII prevailingly occurs by faster fibroblast formation.