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Fung RKF, Kerridge IH, Skene LLC, Munsie MJ. Tempering hope with realism: induced pluripotent stem cells in regenerative medicine. Med J Aust 2012; 196:622-5. [PMID: 22676869 DOI: 10.5694/mja11.11039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Ronald K F Fung
- Centre for Values, Ethics and the Law in Medicine, Sydney Medical School, University of Sydney, Sydney, NSW, Australia.
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Asian immigrants to the United States are less likely to donate cryopreserved embryos for research use. Fertil Steril 2011; 95:1672-6. [DOI: 10.1016/j.fertnstert.2011.01.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 01/09/2011] [Accepted: 01/18/2011] [Indexed: 11/23/2022]
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Swazo NK. "Just one animal among many?" Existential phenomenology, ethics, and stem cell research. THEORETICAL MEDICINE AND BIOETHICS 2010; 31:197-224. [PMID: 20521117 PMCID: PMC2883080 DOI: 10.1007/s11017-010-9143-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Stem cell research and associated or derivative biotechnologies are proceeding at a pace that has left bioethics behind as a discipline that is more or less reactionary to their developments. Further, much of the available ethical deliberation remains determined by the conceptual framework of late modern metaphysics and the correlative ethical theories of utilitarianism and deontology. Lacking, to any meaningful extent, is a sustained engagement with ontological and epistemological critiques, such as with "postmodern" thinking like that of Heidegger's existential phenomenology. Some basic "Heideggerian" conceptual strategies are reviewed here as a way of remedying this deficiency and adding to ethical deliberation about current stem cell research practices.
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Affiliation(s)
- Norman K Swazo
- College of Science and General Studies, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia.
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Gu H, Yue Z, Leong WS, Nugraha B, Tan LP. Control of in vitro neural differentiation of mesenchymal stem cells in 3D macroporous, cellulosic hydrogels. Regen Med 2010; 5:245-53. [DOI: 10.2217/rme.09.89] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: Mesenchymal stem cells (MSCs) are multipotent cells that can be induced to differentiate into multiple cell lineages, including neural cells. They are a good cell source for neural tissue-engineering applications. Cultivation of human (h)MSCs in 3D scaffolds is an effective means for the development of novel neural tissue-engineered constructs, and may serve as a promising strategy in the treatment of nerve injury. Aim: This study presents the in vitro growth and neural differentiation of hMSCs in 3D macroporous, cellulosic hydrogels. Results: The number of hMSCs cultivated in the 3D scaffolds increased by more than 14-fold after 7 days. After 2 days induction, most of the hMSCs in the 3D scaffolds were positive for nestin, a marker of neural stem cells. After 7 days induction, most of the hMSCs in the 3D scaffolds showed glial fibrillary acidic protein, tubulin or neurofilament M-positive reaction and a few hMSCs were positive for nestin. After 14 days induction, hMSCs in the 3D scaffolds could completely differentiate into neurons and glial cells. The neural differentiation of hMSCs in the 3D scaffolds was further demonstrated by real-time PCR. Conclusion: These results show that the 3D macroporous cellulosic hydrogel could be an appropriate substrate for neural differentiation of hMSCs and its possible applications in neural tissue engineering are discussed.
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Affiliation(s)
- Haigang Gu
- Division of Materials Technology, School of Materials Science & Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Zhilian Yue
- Institute of Biotechnology & Nanotechnology, A*STAR, The Nanos, #04-01, 31, Biopolis Way, 138669, Singapore
| | - Wen Shing Leong
- Division of Materials Technology, School of Materials Science & Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Bramasta Nugraha
- Institute of Biotechnology & Nanotechnology, A*STAR, The Nanos, #04-01, 31, Biopolis Way, 138669, Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS), Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, 117456, Singapore
| | - Lay Poh Tan
- Division of Materials Technology, School of Materials Science & Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
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