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Three-Dimensional Porous Collagen/Chitosan Complex Sponge for Tissue Engineering
Kim, Sung Eun,Cho, Yong Woo,Kang, Eun Jung,Kwon, Ick Chan,Lee, Eunhee Bae,Kim, Jung Hyun,Chung, Hesson,Jeong, Seo Young The Korean Fiber Society 2001 Fibers and polymers Vol.2 No.2
A three-dimensional, porous collagen/chitosan complex sponge was prepared to closely simulate basic extracellular matrix (ECM) constitutes, collagen and glycosaminoglycan. The complex sponge was prepared by a lyophilization method and had the regular network with highly porous structure, suitable for cell adhesion and growth. The pores were well interconnected, and their distribution was fairly homogeneous. The complex sponge was crosslinked using 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to increase its boilogical stability and enhance its mechanical properties. The crosslinking medium has a great effect on the inner structure of the sponge. The homogeneous, porous structure of the sponge was remarkably collapsed in an aqueous crosslinking medium. However, the morphology of the sponge remained almost intact in a water/ethanol mixture crosslinking milieu. Mechanical properties of the collagen/chitosan sponge were significantly enhanced by EDC-mediated crosslinking. The potential of the sponge as a scaffold for tissue engineering was investigated using a Chinese hamster ovary cell (CHO-K1) line.
Cho, Sang Hyun,Bahar-Moni, Ahmed Suparno,Whang, Jong Ick,Seo, Hyeung Gyo,Park, Hyun Sik,Kim, Ji Sup,Park, Hyun Chul The Korean Society for Microsurgery 2016 Archives of reconstructive microsurgery Vol.25 No.1
In cases of replantation, accurate closure of all structures, including bone, tendons, arteries, nerves, and veins is essential. Among these, the vein is a weaker structure and is damaged severely in most amputation cases. After fixation of bone, repair of tendons, nerves, and arteries, surgeons often experience difficulty in performing venous anastomoses. We found that in such cases, venous anastomosis is easy to perform using an additional incision after closure of the original wound. In a 33-year-old male patient with amputation of all four fingers at the metacarpophalangeal joint level, venous anastomoses were performed with dorsal veins using additional incisions after completion of the fixation of bones and repair of all other structures and closure of the skin due to surgical site tension.
Cho, Ick-Hyun,Lü,, Zhi-Rong,Yu, Jae-Ran,Park, Yong-Doo,Yang, Jun-Mo,Hahn, Myong-Joon,Zou, Fei Adenine Press 2009 Journal of biomolecular structure & dynamics Vol.27 No.3
<P>The overexpression of a single tyrosinase gene can induce conspicuous pigmentation in nonpigmented cells. We hypothesized that some unknown tyrosinase-associated genes are simultaneously regulated by melanin synthesis. To improve understanding of melanogenesis and tyrosinase-associated functions, we attempted to profile the genes that are altered during melanin production in HEK293 cells by using a functional DNA chip microarray. The candidate genes were obtained based on significance analysis of microarray (SAM) and further computational prediction via protein-protein interaction (PPI) mapping suggested that newly detected hub genes were involved in melanogenesis. PPI mapping using bioinformatic tools revealed 8 genes that formed an interaction hub. The yeast two-hybridization results suggested some candidate genes could interact with tyrosinase. The present study provides information to further understand the complex factors associated with tyrosinase-induced melanogenesis and apoptosis. The approach of combining expression data analysis and predicted protein interaction partners can help identify genes involved in pigmentation.</P>
Rapid Identification of Ginseng Cultivars (Panax ginseng Meyer) Using Novel SNP-Based Probes
Ick-Hyun Jo,Kyong Hwan Bang,Young-Chang Kim,Jei-Wan Lee,A-Yeon Seo,Bong-Jae Seong,Hyun-Ho Kim,Dong-Hwi Kim,Seon-Woo Cha,Yong-Gu Cho,Hong-Sig Kim 고려인삼학회 2011 Journal of Ginseng Research Vol.35 No.4
In order to develop a novel system for the discrimination of five ginseng cultivars (Panax ginseng Meyer), single nucleotide polymorphism (SNP) genotyping assays with real-time polymerase chain reaction were conducted. Nucleotide substitution in gDNA library clones of P ginseng cv. Yunpoong was targeted for the SNP genotyping assay. From these SNP sites, a set of modified SNP specific fluorescence probes (PGP74, PGP II 0, and PGP 130) and novel primer sets have been developed to distinguish among five ginseng cultivars. The combination of the SNP type of the five cultivars, Chungpoong, Yunpoong, Gopoong, Kumpoong, and Sunpoong, was identified as "ATA", "GCC", "GTA", "GCA", and" ACC", respectively. This study represents the first report of the identification of ginseng cultivars by fluorescence probes. An SNP genotyping assay using fluorescence probes could prove useful for the identification of ginseng cultivars and ginseng seed management systems and guarantee the purity of ginseng seed.
( Soo Ick Cho ),( Jaewon Lee ),( Jin Lim ),( Jong Seo Park ),( Miso Kim ),( Tae-yong Kim ),( Tae Min Kim ),( Kyung-hun Lee ),( Bhumsuk Keam ),( Sae-won Han ),( Je-ho Mun ),( Kwang Hyun Cho ),( Seong J 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.2
Background: Pruritus is very common symptom in patients under anti-cancer therapy. However, the characteristics of pruritus according to anti-cancer agents have not been known well. Objectives: To ascertain the characteristics of pruritus induced by targeted anti-cancer agents using a questionnaire-based survey. Methods: Questionnaires included numerical rating scale (NRS) for itching, 5-D itch scale and skin dryness. Medical records of anticancer treatment, including cancer types and types of anticancer agents, were reviewed. Results: Total 374 cancer patients finished the survey, of which 107 (28.6%) were treated with targeted therapy. Two hundreds and five (54.8%) patients had pruritus, of which 65 (31.7%) were under targeted therapy. Epidermal growth factor receptor inhibitors (EGFRIs) users showed highest prevalence of itching (77.3%) and score of NRS for itching. 5-D itch score was also highest in subjects of EGFRIs, particularly in items of duration, degree, disability and distribution. Patients of EGFRIs showed high prevalence of itching on face, chest, buttocks and upper arms. Skin dryness in EGFRIs showed strongest relationship with 5-D itch scale score. Conclusion: Patients receiving EGFRIs suffered from pruritus frequently and severely. They not only experienced long-lasting and intense itching causing sleep discomfort, also had specific body sites of itching. Clinicians should pay attention to unusual features of itching according to types of targeted therapy.
Rapid Identification of Ginseng Cultivars (Panax ginseng Meyer) Using Novel SNP-Based Probes
Jo, Ick-Hyun,Bang, Kyong-Hwan,Kim, Young-Chang,Lee, Jei-Wan,Seo, A-Yeon,Seong, Bong-Jae,Kim, Hyun-Ho,Kim, Dong-Hwi,Cha, Seon-Woo,Cho, Yong-Gu,Kim, Hong-Sig The Korean Society of Ginseng 2011 Journal of Ginseng Research Vol.35 No.4
In order to develop a novel system for the discrimination of five ginseng cultivars (Panax ginseng Meyer), single nucleotide polymorphism (SNP) genotyping assays with real-time polymerase chain reaction were conducted. Nucleotide substitution in gDNA library clones of P. ginseng cv. Yunpoong was targeted for the SNP genotyping assay. From these SNP sites, a set of modified SNP specific fluorescence probes (PGP74, PGP110, and PGP130) and novel primer sets have been developed to distinguish among five ginseng cultivars. The combination of the SNP type of the five cultivars, Chungpoong, Yunpoong, Gopoong, Kumpoong, and Sunpoong, was identified as 'ATA', 'GCC', 'GTA', 'GCA', and 'ACC', respectively. This study represents the first report of the identification of ginseng cultivars by fluorescence probes. An SNP genotyping assay using fluorescence probes could prove useful for the identification of ginseng cultivars and ginseng seed management systems and guarantee the purity of ginseng seed.