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Generation of Induced Pluripotent Stem Cells from Mouse Hepatocytic Lineage Cells
Dongho Choi,Kye-Yoon Park,Jeonghoon Heo,Cheul Hyung Cho,Marian Durkin,Agnes Holczbauer,Jens U. Marquardt,Valentina M. Factor,Karim Si-Tayeb,Stephen A. Duncan,Snorri S. Thorgeirsson 한국간담췌외과학회 2010 한국간담췌외과학회 학술대회지 Vol.2010 No.3
Choi, Dongho,Oh, Jeong-Ik,Baek, Kitae,Lee, Jechan,Kwon, Eilhann E. Pergamon Press 2018 Energy Vol.153 No.-
<P><B>Abstract</B></P> <P>Co-pyrolysis of chicken manure and biomass was investigated in this study. The pyrolysis of individual samples was characterized by thermogravimetric analysis (TGA) under N<SUB>2</SUB> and CO<SUB>2</SUB> atmospheres. This demonstrated that the impact of CO<SUB>2</SUB> content on the physical aspects of pyrolysis such as onset and end temperatures, and residual mass was negligible. However, a high CaCO<SUB>3</SUB> content (17 wt%) in chicken manure catalyzed the Boudouard reaction. Despite its negligible physical influence, CO<SUB>2</SUB> evidently affected the co-pyrolysis of chicken manure and biomass chemically. It expedited the thermal cracking of hydrocarbons from the co-pyrolysis of chicken manure and biomass. Moreover, between 550 and 660 °C, CO<SUB>2</SUB> reacted with condensable hydrocarbons, effectively improving CO generation. This observation suggested that CO<SUB>2</SUB> acted as both carbon scavenger and oxygen donor in the co-pyrolysis of chicken manure and biomass, a driving force for shifting carbon distribution between pyrogenic products. For example, pyrolytic oil was transformed into syngas, especially CO, offering an innovative means to modify compositions of pyrolytic products. These effects were not observed in the presence of CaCO<SUB>3</SUB> and/or CaO.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The high content of CaCO<SUB>3</SUB> in chicken manure catalytically enhances the Boudouard reaction. </LI> <LI> Establishing waste-to-energy via co-pyrolysis of chicken manure and lignocellulosic biomass. </LI> <LI> The enhanced thermal cracking of tar using CO<SUB>2</SUB>. </LI> <LI> CO<SUB>2</SUB> acted like a donor of C and O to form CO, which results in the more generation of syngas. </LI> </UL> </P>
Choi, Dongho,Kim, Jung Hoon,Lim, Misun,Song, Kang Won,Paik, Seung Sam,Kim, Sook Ja,Cheong, Hee Jeong,Jeon, Jin Seok,Park, Hee Sook,Song, Yun Seob,Khang, Hyunsoo,Won, Jong-Ho Mary Ann Liebert, Inc 2008 Tissue engineering. Part C, Methods Vol.14 No.1
<P>Cell transplantation using hepatocytes derived from stem cells has been regarded as a possible alternative treatment for various hepatic disorders. Recently, mesenchymal stem cells (MSCs) from the bone marrow have shown the potential to differentiate into hepatocytes in in vitro and in vivo conditions. Noninvasive imaging techniques allowing in vivo assessment of the location of cells are of great value for experimental studies in which these cells are transplanted. We labeled human mesenchymal stem cells (hMSCs) with green fluorescence protein (GFP) and superparamagnetic iron oxide (SPIO) using a transfection agent (GenePORTER). Cellular labeling was evaluated with magnetic resonance (MR) imaging of labeled suspensions, and Prussian blue staining for iron assessment. hMSCs labeled with SPIO and GFP were injected into the portal veins of immunosuppressed, hepatic-damaged rats. MR imaging findings were compared histologically. To identify the differentiation of hMSCs into hepatocytes and to trace the hepatocytes with molecular imaging, we observed the potential of SPIO and GFP double-labeled hMSCs to differentiate into hepatocyte-like cells in the regenerating rat liver. Serial MR imaging showed the possible detection of transplanted cells in the early period of transplantation. Our results indicate that magnetic labeling of hMSCs with SPIO may enable cellular MR imaging and tracking in experimental in vivo settings.</P>