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Sunaoshi M, Blyth BJ, Shang Y, Tsuruoka C, Morioka T, Shinagawa M, Ogawa M, Shimada Y, Tachibana A, Iizuka D, Kakinuma S. Post-Irradiation Thymic Regeneration in B6C3F1 Mice Is Age Dependent and Modulated by Activation of the PI3K-AKT-mTOR Pathway. BIOLOGY 2022; 11:biology11030449. [PMID: 35336821 PMCID: PMC8945464 DOI: 10.3390/biology11030449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 11/23/2022]
Abstract
Simple Summary Because children have a long life expectancy relative to adults and their tissues and organs are growing and developing rapidly, the risk of radiation carcinogenesis for children is considered higher than that for adults. However, the underlying mechanism(s) is unclear. To uncover the mechanism, we previously revealed that principal causative genes in mouse thymic lymphomas arising in irradiated infants or adults as Pten or Ikzf1, respectively, suggesting that cells with mutation in these genes might be the origin of lymphomas arising after irradiation depending on age at exposure. Here, we clarified the age-dependent differences in thymus-cell dynamics in mice during the initial post-irradiation period. Our results demonstrate that the dynamics of thymocytes during the post-irradiation period depends on the age at exposure. For irradiated infants in particular, the number of proliferating cells increase dramatically, and this correlate with activation of the PI3K-AKT-mTOR pathway. Thus, we conclude that the PI3K-AKT-mTOR pathway in infants contributed, at least in part, to thymus-cell dynamics through the modification of cell proliferation and survival after irradiation, which may be associated with the risk of Pten mutation-associated thymic lymphoma. Abstract The risk of radiation-induced carcinogenesis depends on age at exposure. We previously reported principal causative genes in lymphomas arising after infant or adult exposure to 4-fractionated irradiation as Pten or Ikzf1, respectively, suggesting that cells with mutation in these genes might be the origin of lymphomas arising after irradiation depending on age at exposure. Here, we clarified the age-dependent differences in thymus-cell dynamics in mice during the initial post-irradiation period. The thymocyte number initially decreased, followed by two regeneration phases. During the first regeneration, the proportion of phosphorylated-AKT-positive (p-AKT+) cells in cell-cycle phases S+G2/M of immature CD4−CD8− and CD4+CD8+ thymocytes and in phases G0/G1 of mature CD4+CD8− and CD4−CD8+ thymocytes was significantly greater in irradiated infants than in irradiated adults. During the second regeneration, the proportion of p-AKT+ thymocytes in phases G0/G1 increased in each of the three populations other than CD4−CD8− thymocytes more so than during the first regeneration. Finally, PI3K-AKT-mTOR signaling in infants contributed, at least in part, to biphasic thymic regeneration through the modification of cell proliferation and survival after irradiation, which may be associated with the risk of Pten mutation-associated thymic lymphoma.
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Affiliation(s)
- Masaaki Sunaoshi
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Benjamin J. Blyth
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Yi Shang
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Chizuru Tsuruoka
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Takamitsu Morioka
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Mayumi Shinagawa
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Mari Ogawa
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Yoshiya Shimada
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
| | - Akira Tachibana
- Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito 310-8512, Japan;
| | - Daisuke Iizuka
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
- Correspondence: ; Tel.: +81-43-206-3160
| | - Shizuko Kakinuma
- Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Chiba 263-8555, Japan; (M.S.); (B.J.B.); (Y.S.); (C.T.); (T.M.); (M.S.); (M.O.); (Y.S.); (S.K.)
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Pan X, Sun Q, Cai H, Gao Y, Tan W, Zhang W. Encapsulated feeder cells within alginate beads for ex vivo expansion of cord blood-derived CD34+ cells. Biomater Sci 2016; 4:1441-53. [DOI: 10.1039/c6bm00191b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A co-culture system based on encapsulated feeder cells within alginate beads was developed through optimizing the detailed aspects of the cell culture system to expand CD34-positive (CD34+) cells ex vivo.
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Affiliation(s)
- Xiuwei Pan
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Qiong Sun
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Haibo Cai
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yun Gao
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Wensong Tan
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Weian Zhang
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
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Luan C, Chen R, Chen B, Ding J, Ni M. Umbilical cord blood transplantation supplemented with the infusion of mesenchymal stem cell for an adolescent patient with severe aplastic anemia: a case report and review of literature. Patient Prefer Adherence 2015; 9:759-65. [PMID: 26089653 PMCID: PMC4468992 DOI: 10.2147/ppa.s81509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Delayed hematopoietic recovery and increased rate of engraftment failure limit the use of umbilical cord blood transplantation (UCBT). We describe a case of severe aplastic anemia treated by UCBT combined with mesenchymal stem cells. Our case reveals that infusing mesenchymal stem cells early (about 40 days) after UCBT may promote hematopoietic recovery. This experience will guide clinical scientists, especially hematologists, to deal with similar situations and encourage them to widen this strategy.
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Affiliation(s)
- Chengxin Luan
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu Province, People’s Republic of China
| | - Runzhe Chen
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu Province, People’s Republic of China
| | - Baoan Chen
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu Province, People’s Republic of China
- Correspondence: Baoan Chen, Department of Hematology and Oncology, Zhongda Hospital, Medical School, Southeast University, Dingjiaqiao 87, Gulou District, Nanjing 210009, Jiangsu Province, People’s Republic of China, Tel +86 25 8327 2006, Fax +86 25 8327 2011, Email
| | - Jiahua Ding
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu Province, People’s Republic of China
| | - Ming Ni
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine), Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu Province, People’s Republic of China
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