neoplasm
• increase in incidence starting at about 11 months of age
• incidence reaches 33.3% at 13-14 months of age
|
• following an azoxymethane and dextran sulfate sodium tumor induction protocol null mice developed more, larger, and higher grade adenomas in the colon
|
• in 2 of 27 mice
• adenomas are relatively spherical lesions with discrete borders and composed of basophilic tumor cells uniform in appearance
|
• lymphoma in the spleen and lymph nodes in 4 and 3 of 27 mice, respectively
• lymphomas are characterized by the Reed/Sternberg cells or large cells with horse-shoe-shaped nuclei surrounded by lightly staining eosinophilic area
|
cellular
• increased incidence of centrosome amplification in both interphase and mitotic MEFs
|
aneuploidy
(
J:227200
)
• about 20% of MEFs at passage 3 are aneuploid compared to less than 4% of wild-type cells
|
polyploidy
(
J:227200
)
• MEFs are found with greater than 4N DNA content at passage 3
|
• greater than 16% of mitotic passage 3 MEFs display chromosome missegregation compared to only about 3% of wild-type cells
|
• genome instability in passage 3 MEFs
|
homeostasis/metabolism
• following an azoxymethane and dextran sulfate sodium tumor induction protocol null mice developed more, larger, and higher grade adenomas in the colon
|
respiratory system
• in 2 of 27 mice
• adenomas are relatively spherical lesions with discrete borders and composed of basophilic tumor cells uniform in appearance
|