Fig. 7.
Massive apoptosis in Sumf1−/−. (a–c) In situ TUNEL analysis of liver sections of control (a), 1-month-old (b), and 3-month-old (c) Sumf1−/− mice shows a very high number of apoptotic cells in liver. (d and e) In situ TUNEL analysis of brain sections of Sumf1−/− mice shows few apoptotic cells in cerebral cortex in 2-month-old Sumf1−/− brain (d), whereas apoptosis is generalized in cerebral cortex at 6 month of age (e). (f) Apoptotic cell count in the brain cortex from 2- and 6-month-old Sumf1−/− mice and in 6-month-old control mice (values represent mean of n = 3 mice for each group; ∗, Student's t test P < 0.05).