| Conversion from human haematopoietic stem cells to keratinocytes requires keratinocyte secretory factors. | |
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MedLine Citation:
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PMID: 22329411 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background. Recent studies have reported that bone-marrow-derived stem cells (BMSCs), including haematopoietic stem cells (HSCs) and mesenchymal stromal cells, differentiate in order to regenerate various cellular lineages. Based on these findings, it is known that BMSCs can be used clinically to treat various disorders, such as myocardial infarction and neurotraumatic injuries. However, the mechanism of HSC conversion into organ cells is incompletely understood. The mechanism is suspected to involve direct cell-cell interaction between BMSCs, damaged organ cells, and paracrine-regulated soluble factors from the organ, but to date, there have been no investigations into which of these are essential for keratinocyte differentiation from HSCs. Aim. To elucidate the mechanism and necessary conditions for HSC differentiation into keratinocytes in vitro. Methods. We cultured human (h)HSCs under various conditions to try to elucidate the mechanism and necessary conditions for hHSCs to differentiate into keratinocytes. Result. hHSCs cocultured with mouse keratinocytes induced expression of human keratin 14 and transglutaminase I. Only 0.1% of the differentiated keratinocytes possessed multiple nuclei indicating cell fusion. Coculture of hHSCs with fixed murine keratinocytes (predicted to stabilize cellular components) failed to induce conversion into keratinocytes. Conversely, keratinocyte-conditioned medium from both human and mouse keratinocytes was found to mediate hHSC conversion into keratinocytes. Conclusions. Human HSCs are capable of differentiation into keratinocytes, and cell fusion is extremely rare. This differentiating is mediated by the plasma environment rather than by direct cell-cell interactions. |
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Authors:
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Y Fujita; D Inokuma; R Abe; M Sasaki; H Nakamura; T Shimizu; H Shimizu |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-14 |
Journal Detail:
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Title: Clinical and experimental dermatology Volume: - ISSN: 1365-2230 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7606847 Medline TA: Clin Exp Dermatol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© The Author(s). CED © 2012 British Association of Dermatologists. |
Affiliation:
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Department of Dermatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan Department of Dermatology, Faculty of Medicine, University of Toyama, Toyama, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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