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- W1605348484 endingPage "2974" @default.
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- W1605348484 abstract "We have studied the effect of transforming growth factor beta (TGFβ) on erythropoiesis in cultures from adult peripheral blood, using flow cytometric enumeration of fetal hemoglobin (HbF)-containing cells. TGFβ caused a dramatic increase in the proportions of cells that accumulated HbF together with adult hemoglobin (HbA) (F+A+ cells). This highly significant (P < .0001) increase in F+ cell proportion was achieved by TGFβ treatment during the first 4 days of culture and was sustained during further culture expansion in the absence of TGFβ. The increase in F+ cell proportions did not depend on the cytokine combination (EPO+SCF+IL3, EPO+SCF, EPO+IL3, SCF+IL3) used during the phase of TGFβ treatment. Increased F+ cell proportions were paralleled by an increased molecular ratio of HbF/ HbF+ HbA, measured by cation exchange high-performance liquid chromatography (HPLC). In addition to the effect on F+ cell proportions, TGFβ caused a dramatic increase in overall cell division potential. By the time cultures reached terminal growth arrest (12-14 days in controls and 18-26 days after TGFβ), the overall numbers of F+ cells produced per initially seeded clonogenic cell was approximately 10 times higher in the TGFβ-treated cultures than in the controls. We propose to investigate whether the TGFβ-induced increase in relative and absolute numbers of nucleated F+ cells, as demonstrated in vitro, can be translated into increased F+ erythrocytes in vivo, allowing therapeutic application for some beta-hemoglobinopathies." @default.
- W1605348484 created "2016-06-24" @default.
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- W1605348484 date "2000-05-01" @default.
- W1605348484 modified "2023-10-12" @default.
- W1605348484 title "Selectively increased growth of fetal hemoglobin-expressing adult erythroid progenitors after brief treatment of early progenitors with transforming growth factor beta" @default.
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- W1605348484 doi "https://doi.org/10.1182/blood.v95.9.2967.009k21_2967_2974" @default.
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