Journal of Yeungnam Medical Science

In Hwan Song

5 Articles

Adult Mesenchymal Stem Cells for Cell Therapy in Clinical Application.: In Hwan Song; Yeungnam Univ J Med. 2009;26(1):1-14. Published online June 30, 2009; DOI: https://doi.org/10.12701/yujm.2009.26.1.1

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Human bone marrow-derived mesenchymal stem cells (MSCs) are a rare population of undifferentiated cells that have the capacity of self renewal and the ability to differentiate into mesodermal phenotypes, including osteocytes, chondrocytes, and adipocytes in vitro. Recently, MSCs have been shown to reside within the connective tissue of most organs, and their surface phenotype has been well analyzed. Many reports showed that transplanted MSCs enhanced regeneration as well as functional improvement of damaged organs and tissues. The wide differentiation plasticity of MSCs was expected to contribute to their demonstrated efficacy in a wide variety of experimental animal models and in human clinical trials. However, new findings suggest that the ability of MSCs to alter the tissue microenvironment via secretion of soluble factors may contribute more significantly than their capacity for differentiation in tissue repair. This review describes what is known about the cellular characteristics and differentiation potential of MSCs, which represent a promising stem cell population for further applications in regenerative medicine.

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Application of Bio-Active Elastin-like Polypeptide on Regulation of Human Mesenchymal Stem Cell Behavior
Vijaya Sarangthem, Harshita Sharma, Mohini Mendiratta, Ranjit Kumar Sahoo, Rang-Woon Park, Lalit Kumar, Thoudam Debraj Singh, Sujata Mohanty
Biomedicines.2022; 10(5): 1151. CrossRef
Mesenchymal Stem Cells Decrease Oxidative Stress in the Bowels of Interleukin-10 Knockout Mice
Kyong Jin Jung, Gun Woo Lee, Chul Hyun Park, Tae Jin Lee, Joo Young Kim, Eon Gi Sung, Seong Yong Kim, Byung Ik Jang, In Hwan Song
Gut and Liver.2020; 14(1): 100. CrossRef
Human adipose-derived stem cells attenuate inflammatory bowel disease in IL-10 knockout mice
Woo Yeun Jung, Joo Hwan Kang, Kyung Gon Kim, Hee Snn Kim, Byung Ik Jang, Yong Hoon Park, In-Hwan Song
Tissue and Cell.2015; 47(1): 86. CrossRef

Isolation of Endothelial Cells and Smooth Muscle Cells from Rat Aort.: Young Eun Yun, In Hwan Song, Eon Ki Sung, Joo Young Kim; Yeungnam Univ J Med. 2006;23(2):182-192. Published online December 31, 2006; DOI: https://doi.org/10.12701/yujm.2006.23.2.182

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Abstract PDF: BACKGROUND
Atherosclerosis has emerged as the leading cause of death in developed countries. At present, human umbilical vein endothelial cells (HUVEC) are most commonly used for the investigation of Endothelial cells (EC). However, HUVEC are not found in arteries but only in veins. Currently there are many reports on methods used to isolate EC;, most of these methods require special equipment to remove contaminating smooth muscle cells (SMC). MATERIALS AND METHODS: The method described here may be used to isolate not only ECs but also SMCs;,the approach presented here did not require special equipment. Rat aorta was treated with 2 mg/ml of type II collagenase solution for 45 minutes. The isolated cells from the aorta were incubated in medium G for a week;, only ECs could be separated. After the collagenase treatment, the rest of aorta was cut lengthwise, and left undisturbed to obtain SMCs in the culture dish for 10 days. To verify the purity of the isolated cells, we performed immunofluorescence and evaluated the results with transmission electron microscopy analysis. RESULTS: The immunofluorescence study demonstrated specific expression of CD31 and alpha-smooth muscle actin in the isolated ECs and SMCs, respectively. Cultured ECs and SMCs showed their own fine structure characteristics. CONCLUSION: These results suggest that this method for isolating ECs and SMCs may be especially useful for the study of atherosclerosis.

Bone Formation by rhBMP-7 Transduced HEK 293 Cells in Nude Mouse.: Su Yon Jeong, Won Tae Chang, Yon Sil Chang, Myun Hwan Ahn, Jae Ryong Kim, In Hwan Song; Yeungnam Univ J Med. 2003;20(2):142-151. Published online December 31, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.2.142

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Abstract PDF: To induce bone formation at ectopic site by tissue engineering and gene therapy, we transplanted collagen sponges containing rhBMP-7 transduced HEK 293 cells in the hypodermis of nude mice. Bone formation was investigated by histological and electron microscopic method at 3, 6, and 9 weeks after transplantation. At 9 weeks after transplantation, eosinophilic bony tissue was observed in the implanted collagen sponge and was confirmed as bone tissue by Von Kossa stain. In the transmission electron microscopic observation, the cells in newly formed bone tissue had eccentrically located nucleus and well developed rough endoplasmic reticulum (rER). Therefore, the cells were evaluated as osteoblasts. Those results suggest that it is possible to form a bone tissue in the ectopic site by transplantation of rhBMP-7 transduced HEK 293 cells. This will be contributed to push more advanced gene therapy for bone formation. However, the HEK 293 cell is unable to apply to the clinical gene therapy. Therefore it is worth to find more compatible cells for clinical application. In addition, collagen sponge is considered as an excellent scaffold and/or carrier for gene therapy and a good biomaterial for tissue engineering.

Distribution patterns of cytoskelectal proteins in cardiac endothelial cells : Investigation using monoclonal antibodies.: Han Chul Kim, In Hwan Song, Yung Chang Lee; Yeungnam Univ J Med. 1990;7(2):27-37. Published online December 31, 1990; DOI: https://doi.org/10.12701/yujm.1990.7.2.27

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Abstract PDF: To investigate the changing patterns of microfilament and microtubule arrangement and influence of myocardial cells and colchicines to microfilament and microtubule formation in cardiac endothelial cells the authors carried out indirect immunofluorescence stain for actin and tubulin with supernatant monoclonal antibodies. Secondary antibodies were IgG FITC conjugate. The results were summarized as follows. Fiberform reactions were stronger in the cells with many processes and spread cytoplasm and they became weaker after the endothelial cells formed monolayer. In the endothelial cells cocultured with myocardial cells the fiberform of the microtubule became less visible compared to control group but fiberform of the microtubule maintained strong intensity as endothelial cells formed monolayer. In the group treated with colchicines, there were no visible differences in microfilaments compared to control group but fiberform of microtubule revealed weaker intensity after colchicines treatment. The intensity of microtubule fiberform returned to control level after 2 days.

Transition of Marker Enzymes of Rat Hepatocyte Organelles in Culture.: In Hwan Song, Joo Yung Kim, Eon Ki Sung, Yung Chang Lee; Yeungnam Univ J Med. 1989;6(2):133-140. Published online December 31, 1989; DOI: https://doi.org/10.12701/yujm.1989.6.2.133

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Abstract PDF: To investigate recovery, growth, and activity of hepatocyte in primary culture after cell separation, the authors followed up the marker enzyme activities of golgi complex, mitochondria and biologic membrane. Thiamine pyrophosphatase, the marker enzyme of golgi complex, activity approached the level of long term culture at 4th day. Succinate dehydrogenase, the marker enzyme of mitochondria, activity decreased with time, then it maintained constant level after 4th day. Alkaline phosphatase, the marker enzyme of biological membrane, activity increased from 3rd day, and after 5th day it showed strong reaction. These data suggested that hepatocytes were stabilized and recovered normal activity 4 day after cell separation. But the main secretory function was speculated to be reduced in culture.

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