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Sirt1 Deficiency Compromises Embryonic and Adult Hematopoiesis in Mice: Sirt1 Deficiency Compromises Mouse Embryonic Stem Cell Differentiation, and Embryonic and Adult Hematopoiesis in Mice
Xuan Ou
Sirt1 Deficiency Compromises Embryonic and Adult Hematopoiesis in Mice: Sirt1 Deficiency Compromises Mouse Embryonic Stem Cell Differentiation, and Embryonic and Adult Hematopoiesis in Mice
Xuan Ou
SIRT1 is a founding member of a sirtuin family of seven proteins and histone deacetylases. It is involved in cellular resistance to stress, metabolism, differentiation, aging, and tumor suppression. SIRT1-/- mice demonstrate embryonic and postnatal development defects. We examined hematopoietic and endothelial cell differentiation of SIRT1-/- mouse embryonic stem cells (ESCs) in vitro, and hematopoietic progenitors in SIRT1+/+, +/-, and -/- mice. SIRT1-/- ESCs formed fewer mature blast cell colonies. Replated SIRT1-/- BL-CFCs demonstrated defective hematopoietic potential. Endothelial cell production was unaltered, but there were defects in formation of a primitive vascular network from SIRT1-/- derived embryoid bodies. Development of primitive and definitive progenitors derived from SIRT1-/- ESCs were also delayed and/or defective. Differentiation delay/defects were associated with delayed capacity to switch off Oct4, Nanog and Fgf5 expression, decreased ?-H1 globin, ?-major globin, and Scl gene expression, and reduced activation of Erk1/2. Ectopic expression of SIRT1 rescued SIRT1-/- ESC differentiation deficiencies.
Media | Books Paperback Book (Book with soft cover and glued back) |
Released | June 29, 2011 |
ISBN13 | 9783844389654 |
Publishers | LAP LAMBERT Academic Publishing |
Pages | 152 |
Dimensions | 150 × 9 × 226 mm · 231 g |
Language | English |
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