mortality/aging
• mice die by week 2 to 3 of age
|
• at 2 weeks of age, mice exhibit signs of premature aging such as an unstable gait, cachexia, osteopenia with kyphosis and a profound decrease in fat deposition compared to wild-type mice
|
skeleton
N |
• unlike mice homozygous for a null allele, tooth eruption occurs
|
• narrower than in wild-type mice
|
• mice exhibit small growth plates with decreased epiphyseal volumes compared to in wild-type mice
|
• at 2 weeks of age
|
• at E18.5
|
• at 2 weeks, mice exhibit decreases in trabecular and cortical bone volume, and trabecular number and thickness with an increase in trabecular space compared to in wild-type mice
|
osteoporosis
(
J:142669
)
• as determined by decreased bone mineral density
|
• chondrocyte numbers are decreased due to decreased proliferation compared to in wild-type mice
|
growth/size/body
N |
• unlike mice homozygous for a null allele, mice exhibit normal limb length
|
• slightly at birth
|
• by P3 mice, fail to grow relative to wild-type mice
|
cellular
• fed mice exhibit increased autophagy compared to in wild-type mice but not as high as in starved wild-type mice
|
• apoptosis in the spleen and thymus is increased compared to in wild-type mice
|
• at E18.5, proliferation of cells in the subventricular zone and hippocampus are decreased compared to in wild-type mice
• at P14, cell proliferation in the bone marrow is decreased compared to in wild-type mice
|
cardiovascular system
• large blood vessels are atrophic
|
nervous system
adipose tissue
• at 2 weeks of age, mice exhibit a profound decrease in fat deposition compared to wild-type mice
|
behavior/neurological
• at 2 weeks of age, mice exhibit unstable gait
|
homeostasis/metabolism
• fed mice exhibit increased autophagy compared to in wild-type mice but not as high as in starved wild-type mice
|
hematopoietic system
immune system
integument