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Kim Ye Seul,Yoon Jung Won,Kim Dasol,Choi Seunghak,Kim Hyoung Kyu,Youm Jae Boum,Han Jin,Heo Soon Chul,Hyun Sung-Ae,Seo Jung-Wook,Kim Deok-Ho,Kim Jae Ho 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
Human embryonic stem cell-derived cardiomyocytes (hESC-CMs) have been reported to exhibit immature embryonic or fetal cardiomyocyte-like phenotypes. To enhance the maturation of hESC-CMs, we identified a natural steroidal alkaloid, tomatidine, as a new substance that stimulates the maturation of hESC-CMs. Treatment of human embryonic stem cells with tomatidine during cardiomyocyte differentiation stimulated the expression of several cardiomyocyte-specific markers and increased the density of T-tubules. Furthermore, tomatidine treatment augmented the number and size of mitochondria and enhanced the formation of mitochondrial lamellar cristae. Tomatidine treatment stimulated mitochondrial functions, including mitochondrial membrane potential, oxidative phosphorylation, and ATP production, in hESC-CMs. Tomatidine-treated hESC-CMs were more sensitive to doxorubicin-induced cardiotoxicity than the control cells. In conclusion, the present study suggests that tomatidine promotes the differentiation of stem cells to adult cardiomyocytes by accelerating mitochondrial biogenesis and maturation and that tomatidine-treated mature hESC-CMs can be used for cardiotoxicity screening and cardiac disease modeling.
Persistence of Genetically Modified Potatoes in the Field
Kim, Chang-Gi,Kim, Do-Young,Moon, Ye-Seul,Kim, Hyo-Jeong,Kim, Dae-In,Chun, Young-Jin,Park, Kee-Woong,Jeong, Soon-Chun,Kim, Soo-Young,Kim, Hwan-Mook 한국식물학회 2010 Journal of Plant Biology Vol.53 No.6
Volunteers from genetically modified (GM) potatoes may pose an environmental problemif allowed to grow in the field after the annual crop is harvested. We tested whether they are more likely to produce volunteers than non-GM potatoes. Specifically, we compared the number of volunteers, number of tubers per plant, tuber size, and their vertical distribution in the soil. More volunteer plants came from non-GM potatoes than from GM potatoes, but the number and size of tubers were similar between the two. Vertical distribution of the tubers differed significantly, with most non-GM tubers being found in shallower soil (<2 cm deep). Our results suggest that spontaneous GM volunteers may emerge and produce tubers to a degree similar to that of the non-GM plants. No viable volunteers emerged from GM tubers in the next growing season, probably deterred by winter frost and a period of low soil temperatures (below $-2^{\circ}C$) at our study site. However, in regions with warmer climates, such GM volunteers may survive Winter and produce more plants the following year.
Kim Ye-Seul,Choi Jae-Woong,Song Sang Hoon,Hwang Ho Young,Sohn Suk Ho,Kim Ji Seong,Kang Yoonjin,Gu Ja-Yoon,Kim Kyung-Hwan,Kim Hyun Kyung 대한진단검사의학회 2023 Annals of Laboratory Medicine Vol.43 No.4
Background: Point-of-care testing (POCT) coagulometers are increasingly used for monitoring warfarin therapy. However, in high international normalized ratio (INR) ranges, significant discrepancy in the INR between POCT and conventional laboratory tests occurs. We compared the INR of POCT (CoaguChek XS Plus; Roche Diagnostics, Mannheim, Germany) with that of a conventional laboratory test (ACL TOP 750; Instrumentation Laboratory SpA, Milan, Italy) and explored possible reasons for discrepancy. Methods: Paired POCT and conventional laboratory test INRs were analyzed in 400 samples from 126 patients undergoing warfarin therapy after cardiac surgery. Coagulation factor and thrombin generation tests were compared using the Mann–Whitney U test. Correlations between coagulation factors and INRs were determined using Pearson correlation coefficients. Results: The mean difference in the INR between the tests increased at high INR ranges. Endogenous thrombin potential levels were decreased at INR <2.0 for CoaguChek XS Plus and 2.0< INR <3.0 for ACL TOP 750 compared with those at INR <2.0 for both tests, indicating a better performance of ACL TOP 750 in assessing thrombin changes. The correlation coefficients of coagulation factors were stronger for ACL TOP 750 INR than for CoaguChek XS Plus INR. Vitamin K-dependent coagulation factors were found to contribute to the INR discrepancy. Conclusions: Decreases in vitamin K-dependent coagulation and anticoagulation factors can explain the significant discrepancy between the two tests in high INR ranges. Since conventional laboratory test INR values are more reliable than POCT INR values, a confirmatory conventional laboratory test is required for high INR ranges.
FC 2-7 : Elevated KAI1 protein expression identified in malignant melanoma
( Ye Seul Kim ),( Ji Hoon Sim ),( Sang Jin Oh ),( Je Min An ),( Sang Hoon Lee ),( Sung Yul Lee ),( Moon Kyun Cho ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: KAI1/CD82 reportedly slows the metastatic process in a variety of tumors. However, its function is not fully clear. This study investigates the expression of KAI1 in correlation with malignant skin cancers. Objectives: To investigate the expression and clinical significance of KAI1 protein in malignant skin cancers. Methods: KAI1/CD82 expression was evaluated by western blotting in 24 specimens including 6 malignant melanoma (MM), 6 squamous cell carcinoma (SCC), 6 BCC and 6 normal skin specimens. Immunohistochemical staining was performed to measure KAI1/CD82 expression in 6 MM, 6 SCC and 6 BCC. Results: We observed over-expression of KAI1 in the malignant melanoma. The expressions of KAI1 in malignant melanoma were higher than those in SCC and BCC. The KAI1 expressions in malignant melanoma were higher in protein levels compared to SCC and BCC. Western blotting results agreed with immunohistochemistry. Conclusion: KAI1 is highly related to malignant melanoma and may be a useful indicator of malignant melanoma.
P288 : The effect of PPARa activator containing moisturizer in patients with facial erythema
( Ye Seul Kim ),( Han Eul Lee ),( Gang Mo Lee ),( Je Min An ),( Young Lip Park ),( Moon Kyun Cho ),( Jong Kyung Youm ),( Sang Hoon Lee ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Atopic dermatitis, seborrheic dermatitis, irritant or allergic contact dermatitis, rosacea, and acne are skin diseases that cause repeated facial erythema. Topical steroids are used to treat these dermatologic condition and long term use of topical steroids can cause complication such as skin atrophy, telangiectasia, and steroid induced acneiform eruption. PPARα is known to regulate keratinocyte differentiation and proliferation, and also participates in wound healing and skin inflammation. Objectives: This study is about the effect of PPARα activator containing moisturizers in patients with facial erythema by improving anti-inflammatory action and skin barrier function. Methods: 32 patients were included in this study and they were applied with PPARα activator containing moisturizers in one side of the face, and the other side with moisturizers not containing PPARα activator. They were applied twice a day two days a week and the study was double blinded, body-split study. The patients were checked of skin hydration, TEWL, and erythema the first day of hospital visit and 2 weeks after the study. Clinical photo analysis was done for checking erythema index and the result was assessed with doctor and patient survey. Results: Patients applied with PPARα activator containing moisturizer showed significant decrease of erythema measurement using mexameter, and decreased erythema index from photo analysis. No significant difference was noted in skin hydration and TEWL. Conclusion: We confirmed the effect and safety of PPARα activator containing moisturizers and anticipate it as a useful treatment for patients with facial erythema.