mortality/aging
• heterozygous matings yield homozygotes at a reduced birth Mendelian ratio (17% vs expected 25%) with no detectable abnormalities in E13.5 homozygous embryos
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reproductive system
N |
• pairings of homozygotes yield normal litter sizes of up to 12 pups
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hematopoietic system
N |
• homozygotes exhibit normal hematopoiesis with no detectable defects in hematopoietic progenitor cells, myeloid and lymphoid progenitors or B and T cell development in the bone marrow, spleen and thymus
• embryonic stress erythropoiesis in liver and adult erythropoiesis in bone marrow and spleen appear unaffected
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cellular
N |
• in culture, primary mouse embryonic fibroblasts (MEFs) derived from E13.5 embryos show normal growth curves in the absence of any treatment, and exhibit normal survival rates after chronic exposure to various DNA-damage inducing agents or 72 h after single exposure to increasing doses of UV-light relative to similarly treated wild-type controls
• upon Blm (Bloom syndrome, RecQ helicase-like) depletion by siRNA, immortalized MEFs exhibit sister chromatid exchange rates similar to those seen in wild-type MEFs
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