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3篇 您的检索式:作者名="Frieda Law"
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1Human umbilical cord Wharton's Jelly-derived mesenchymal stem cells differentiation into nerve-like cells显示文摘Background The two most basic properties of mesenchymal stem cells (MSCs) are the capacities to self-renew indefinitely and differentiate into multiple cells and tissue types. The cells from human umbilical cord Wharton’s Jelly have properties of MSCs and represent a rich source of primitive cells. This study was conducted to explore the possibility of inducing human umbilical cord Wharton’s Jelly-derived MSCs to differentiate into nerve-like cells.Methods MSCs were cultured from the Wharton’s Jelly taken from human umbilical cord of babies delivered after full-term normal labor. Salvia miltiorrhiza and β-mercaptoethanol were used to induce the human umbilical cord-derived MSCs to differentiate. The expression of neural protein markers was shown by immunocytochemistry. The induction process was monitored by phase contrast microscopy, electron microscopy (EM), and laser scanning confocal microscopy (LSCM) .The pleiotrophin and nestin genes were measured by reverse transcription-polymerase chain reaction (RT-PCR). Results MSCs in the Wharton’s Jelly were easily attainable and could be maintained and expanded in culture. They were positive for markers of MSCs, but negative for markers of hematopoietic cells and graft-versus-host disease (GVHD)-related cells. Treatment with Salvia miltiorrhiza caused Wharton’s Jelly cells to undergo profound morphological changes. The induced MSCs developed rounded cell bodies with multiple neurite-like extensions. Eventually they developed processes that formed networks reminiscent of primary cultures of neurons. Salvia miltiorrhiza and β-mercaptoethanol also induced MSCs to express nestin, β-tubulinⅢ, neurofilament (NF) and glial fibrillary acidic protein (GFAP). It was confirmed by RT-PCR that MSCs could express pleiotrophin both before and after induction by Salvia miltiorrhiza. The expression was markedly enhanced after induction and the nestin gene was also expressed.Conclusions MSCs could be isolated from human umbilical cord Wharton’s Jelly. They were capable of differentiating into nerve-like cells using Salvia miltiorrhiza or β-mercaptoethanol. The induced MSCs not only underwent morphologic changes, but also expressed the neuron-related genes and neuronal cell markers. They may represent an alternative source of stem cells for central nervous system cell transplantation.MA Lian FENG Xue-yong CUI Bing-lin Frieda Law JIANG Xue-wu YANG Li-ye XIE Qing-dong HUANG Tian-hua 2005Chinese Medical Journal2005,,23:103
2Effect of epidermal growth factor and dexamethasone on fetal rat lung development显示文摘MA Lian WANG Ai-hong Law Frieda HE Hong-yan MA Gui-xia WANG Hong-wu LIN Li-min 2009Chinese Medical Journal2009,,17:4
3Ileal perforation: a late surgical complication of Henoch-Sch?nlein purpura显示文摘Frieda Law Patricia M. Davidson Maxwell Robinson Keith B. Stokes 1987Pediatric Surgery International1987,,3:1
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