OBJECTIVE: The bcl-6 proto-oncogene is ubiquitously expressed in various tissues. Since we found out the smaller number of TER119(+) cells in the spleen of neonatal bcl-6-deficient (bcl-6(-/-)) mice compared with that of control (bcl-6(+/+)) littermates, we studied functions of bcl-6 in differentiation of erythroid lineage cells. MATERIALS AND METHODS: Erythroblasts in the definitive erythropoiesis were separated into four subsets using anti-TER119 and anti-CD71 mAbs. The cell number and property of these four subsets in spleens of neonatal bcl-6(+/+) and bcl-6(-/-) mice were examined using a flow cytometry. RESULTS: bcl-6 mRNA expression was detected in the TER119(high)CD71(high) subset, which is morphologically equivalent to basophilic erythroblasts, by reverse-transcribed polymerase chain reaction. High percentages of cells in the TER119(low)CD71(high) and TER119(high)CD71(high) subsets were in the cell cycle. The cell number of the TER119(high)CD71(high) subset in the spleen and the percentage of reticulocytes in the peripheral blood of neonatal bcl-6(-/-) mice were significantly lower than those of neonatal bcl-6(+/+) mice. However, the percentage of apoptotic cells and that of cells in the cell cycle in the TER119(high)CD71(high) subset of bcl-6(-/-) mice were similar to those of bcl-6(+/+) mice. CONCLUSION: bcl-6 detected in the TER119(high)CD71(high) subset of erythroblasts in the spleen of neonatal mice may be required to retain the erythroblasts in the cell proliferation stage.
OBJECTIVE: The bcl-6 proto-oncogene is ubiquitously expressed in various tissues. Since we found out the smaller number of TER119(+) cells in the spleen of neonatal bcl-6-deficient (bcl-6(-/-)) mice compared with that of control (bcl-6(+/+)) littermates, we studied functions of bcl-6 in differentiation of erythroid lineage cells. MATERIALS AND METHODS: Erythroblasts in the definitive erythropoiesis were separated into four subsets using anti-TER119 and anti-CD71 mAbs. The cell number and property of these four subsets in spleens of neonatal bcl-6(+/+) and bcl-6(-/-) mice were examined using a flow cytometry. RESULTS:bcl-6 mRNA expression was detected in the TER119(high)CD71(high) subset, which is morphologically equivalent to basophilic erythroblasts, by reverse-transcribed polymerase chain reaction. High percentages of cells in the TER119(low)CD71(high) and TER119(high)CD71(high) subsets were in the cell cycle. The cell number of the TER119(high)CD71(high) subset in the spleen and the percentage of reticulocytes in the peripheral blood of neonatal bcl-6(-/-) mice were significantly lower than those of neonatal bcl-6(+/+) mice. However, the percentage of apoptotic cells and that of cells in the cell cycle in the TER119(high)CD71(high) subset of bcl-6(-/-) mice were similar to those of bcl-6(+/+) mice. CONCLUSION:bcl-6 detected in the TER119(high)CD71(high) subset of erythroblasts in the spleen of neonatal mice may be required to retain the erythroblasts in the cell proliferation stage.
Authors: Nicolas Goardon; Julie A Lambert; Patrick Rodriguez; Philippe Nissaire; Sabine Herblot; Pierre Thibault; Dominique Dumenil; John Strouboulis; Paul-Henri Romeo; Trang Hoang Journal: EMBO J Date: 2006-01-12 Impact factor: 11.598
Authors: Wolfgang Bauer; Martina Rauner; Michael Haase; Satu Kujawski; Laleh S Arabanian; Ivonne Habermann; Lorenz C Hofbauer; Gerhard Ehninger; Alexander Kiani Journal: Haematologica Date: 2011-07-12 Impact factor: 9.941
Authors: I Cortegano; P Melgar-Rojas; L Luna-Zurita; M Siguero-Álvarez; M A R Marcos; M L Gaspar; J L de la Pompa Journal: Cell Death Differ Date: 2014-02-28 Impact factor: 15.828
Authors: Natalia A Kokorina; Celine J Granier; Stanislav O Zakharkin; Stephani Davis; Arnold B Rabson; Hatem E Sabaawy Journal: Exp Hematol Date: 2012-08-22 Impact factor: 3.084
Authors: Hal E Broxmeyer; Sarita Sehra; Scott Cooper; Lisa M Toney; Saritha Kusam; Jim J Aloor; Christophe C Marchal; Mary C Dinauer; Alexander L Dent Journal: Mol Cell Biol Date: 2007-05-25 Impact factor: 4.272