hematopoietic system
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• pronounced histological disorganization is seen in young mice
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• decrease in size is mainly the result of a decrease in the number of CD45+ hematopoietic cells
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• slight decrease in the number of granulocyte-monocyte progenitor (GMP) cells
• decrease in the frequency of colony forming cells in semi solid culture
• reduction in stem cell and progenitor cell numbers increases progressively with age starting around 2 weeks of age
• in competitive repopulation assays mutant bone marrow cells are unable to compete with wild-type cells
• cells can engraft under noncompetitive conditions but show long term progressive graft failure
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• decrease in B cell numbers is first significant at the pro-B stage
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• hypocellular mostly as a result of a decrease in the numbers of B lineage cells
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• marked reduction in the number of common lymphoid progenitor cells
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• of the subpopulations of B cells, pre-B cells are the most reduced in number
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• all T cell lineages are reduced in number in the thymus starting from the earliest immature DN1 stage
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• decrease in the number of DN1 cells
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• increase in proliferation of long term hematopoietic stem cells suggesting a decrease in the pool of quiescent stem cells
• secondary transplant assays indicate that long term hematopoietic stem cells are impaired in self renewal
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• marked reduction in the Lin-c-Kit+Sca-1+ cell population
• significant reduction in the number of long term hematopoietic stem cells
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• pronounced histological disorganization is seen in young mice
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• decrease in size is mainly the result of a decrease in the number of CD45+ hematopoietic cells
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immune system
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• pronounced histological disorganization is seen in young mice
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• decrease in size is mainly the result of a decrease in the number of CD45+ hematopoietic cells
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• decrease in B cell numbers is first significant at the pro-B stage
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• of the subpopulations of B cells, pre-B cells are the most reduced in number
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• all T cell lineages are reduced in number in the thymus starting from the earliest immature DN1 stage
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• decrease in the number of DN1 cells
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• pronounced histological disorganization is seen in young mice
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• decrease in size is mainly the result of a decrease in the number of CD45+ hematopoietic cells
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endocrine/exocrine glands
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• pronounced histological disorganization is seen in young mice
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• decrease in size is mainly the result of a decrease in the number of CD45+ hematopoietic cells
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