WFS1 and diabetes mellitus: Moreover, at the age of 7.5 months, liraglutide-treated Wfs1 KO animals divided into two groups (Figure 1b): one group, who remained diabetes-free as their glucose tolerance was at the same level with WT saline treated animals (63.2%, 12 out of 19 animals) and second group, who developed glucose intolerance similarly to saline treated KO animals (36.8%, 7 out of 19 animals).