immune system
|
• males have a drastically reduced number of thymocytes, 0.5 1.6 x107, due to massive deletion of double positive (CD4+CD8+) thymocytes; there are a normal number of double negative thymocytes, but they are the predominant cell type due to the deletion of the double positive population
|
|
• females have an increased proportion of CD4-CD8+ and CD4-CD8- thymocytes with a corrosponding decrease in the CD4+CD8+ population; greater than 95% of thymocytes in females and males express the transgenic Tcrb-V and the level of CD3 expression in males matches the higher values of the normal spectrum
(J:79738)
• the Tcra and Tcrb transgenes are expressed in an appropriately tissue-specific fashion, but allelic exclusion by the transgenic Tcra is leaky, permitting endogenous rearrangement and expression in a minority of T cells; some male-derived T cell clones that respond to alloantigen were found to have excised the transgenic insertion
(J:90776)
|
|
• male lymph node T cells are 58% CD4-CD8-, 7% CD4+ CD8-, and 35% CD4-CD8+ but with low levels of CD8 expression and these CD4-CD8+ cells fail to respond to C57BL/6 males stimulator cells; female lymph node T cells have normal proportions of CD4 and CD8 expression and the CD4-CD8+ have a very high response rate to C57BL/6 male stimulator cells
|
hematopoietic system
|
• males have a drastically reduced number of thymocytes, 0.5 1.6 x107, due to massive deletion of double positive (CD4+CD8+) thymocytes; there are a normal number of double negative thymocytes, but they are the predominant cell type due to the deletion of the double positive population
|
|
• females have an increased proportion of CD4-CD8+ and CD4-CD8- thymocytes with a corrosponding decrease in the CD4+CD8+ population; greater than 95% of thymocytes in females and males express the transgenic Tcrb-V and the level of CD3 expression in males matches the higher values of the normal spectrum
(J:79738)
• the Tcra and Tcrb transgenes are expressed in an appropriately tissue-specific fashion, but allelic exclusion by the transgenic Tcra is leaky, permitting endogenous rearrangement and expression in a minority of T cells; some male-derived T cell clones that respond to alloantigen were found to have excised the transgenic insertion
(J:90776)
|
|
• male lymph node T cells are 58% CD4-CD8-, 7% CD4+ CD8-, and 35% CD4-CD8+ but with low levels of CD8 expression and these CD4-CD8+ cells fail to respond to C57BL/6 males stimulator cells; female lymph node T cells have normal proportions of CD4 and CD8 expression and the CD4-CD8+ have a very high response rate to C57BL/6 male stimulator cells
|
endocrine/exocrine glands
|
• males have a drastically reduced number of thymocytes, 0.5 1.6 x107, due to massive deletion of double positive (CD4+CD8+) thymocytes; there are a normal number of double negative thymocytes, but they are the predominant cell type due to the deletion of the double positive population
|