Polygiene says that its former chief executive, Christian von Uthmann, has left the company. He had resigned the post in January, retaining a position as vice president of new venture and strategies, which has now been taken over by Peter Sjösten, chief commercial officer of Polygiene. In March, Polygiene said that Von Uthmann and a partner had sold more than 200,000 shares in the company, but he said then that he intended to keep his remaining shares.