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- W2168920723 abstract "Abstract Tumor suppressor p53 plays an important role in regulating cell cycle progression and apoptosis. Here we applied RNA interference to study the role of p53 in human hematopoietic development in vivo. An siRNA construct specifically targeting the human tumor-suppressor gene p53 was introduced into human CD34+ progenitor cells by lentivirus-mediated gene transfer, which resulted in more than 95% knockdown of p53. We adapted the human-SCID mouse model to optimize the development of hematopoietic cells, particularly of T cells. This was achieved by the intraperitoneal injection of CD34+ precursor cells into newborn Rag2-/- γc-/- mice that lack T, B, and NK cells. Robust development of T cells was observed in these mice, with peripheral T-cell repopulation 8 weeks after injection of the precursor cells. Other lymphocyte and myeloid subsets also developed in these mice. Injecting p53 siRNA-transduced CD34+ cells resulted in stable expression and down-modulation of p53 in the mature T-cell offspring. Inactivating p53 did not affect the development of CD34+ cells into various mature leukocyte subsets, including T cells, but it conferred resistance to γ-irradiation and other p53-dependent apoptotic stimuli to the T cells. (Blood. 2004;104:3886-3893)" @default.
- W2168920723 created "2016-06-24" @default.
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- W2168920723 date "2004-12-15" @default.
- W2168920723 modified "2023-10-18" @default.
- W2168920723 title "Monitoring the effect of gene silencing by RNA interference in human CD34+ cells injected into newborn RAG2-/- γc-/- mice: functional inactivation of p53 in developing T cells" @default.
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- W2168920723 doi "https://doi.org/10.1182/blood-2004-02-0656" @default.
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