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리그닌 생합성 관련 유전자 COMT를 이용한 참억새 형질전환 체계 확립
Ji Hye Yoo,Eun Soo Seong,Jae Hoo Choi,Chang Heum Kim,Byeong Ju Kang,Mi Ran Jeon,Dong Cheol Shin,Kweon Heo,Chang Yeon Yu 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.05
Background : Miscanthus is a diploid hybrid and a temperate, perennial, cross-pollinating grass used as bioenergy plant, biomass production and high quality cellulose and ethanol production. This study was to determine an efficient transformation system for Miscanthus sinensis, and to optimize factors and conditions required for expression of MsCOMT–AS gene. Methods and Results : An efficient transformation of callus from M. sinensis was established using Agrobacterium tumefaciens strain LBA4404 harboring a binary vector pMBP1. In order to establish stable transformation system, we obtained high transformation rate from callus by various transformation factor explant type, strain, co-culture periods, acetosyringone concentration, and selective marker. Finally, in this study, seven putative transgenic plants were obtained. Through various tests including PCR analysis and southern blot were to detect antisense of COMT digested Xba I and Sac I restriction enzymes. The biomass of the control plant was superior than transgenic plants. Conclusion : This study was to develop transgenic Miscanthus sinensis by Agrobacterium tumerfeciens mediated transformation to produce high bioethanols and to reduce the lignin content of transgenic plants. Detailed characterization of the transgenic plants revealed interesting finding about COMT gene expression in the segregates
Body Compositions of Elderly and Non-Elderly Patients Following Gastrectomy for Gastric Cancer
( Ji Hoon Kang ),( Mi Ran Jung ),( Sung Eun Kim ),( Oh Jeong ) 한국정맥경장영양학회 2022 한국정맥경장영양학회지 Vol.14 No.2
Purpose: Radical gastric resection is the mainstay of treatment in gastric cancer. However, patients can suffer from eating restrictions, weight loss, and malnutrition after gastrectomy, to which elderly patients are more vulnerable. We compared body composition changes in elderly patients and non-elderly patients after gastrectomy. Materials and Methods: This prospective study enrolled patients who underwent gastrectomy for gastric carcinoma between 2019 and 2021. Body composition was measured using bioelectrical impedance analysis (InBody S10) before surgery and up to 12 months after surgery. Patients were divided into an elderly group (>70 years) and a non-elderly group (≤70 years), and body composition changes were compared between the two groups using the linear mixed model. Results: There were 69 patients in the elderly group and 164 patients in the non-elderly group. The groups showed no significant differences in gastric resection or pathologic stage. Overall, body composition, including total body water, body weight, lean body mass, skeletal muscle mass, and fat mass, decreased immediately after surgery and gradually improved until postoperative 12 months. A linear mixed model showed no significant time×group interactions for any body composition factors between groups. Conclusion: Body composition changes did not significantly differ between elderly patients and non-elderly patients after gastrectomy.
( Mi Sun Kim ),( Tae Jun Park ),( Ji Youn Park ),( Hye Ran Kim ),( Sun Yi Park ),( Kyoung Chan Park ),( Jean Paul Ortonne ),( Hee Young Kang ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Wnt signaling plays a role in the differentiation as well as the development of melanocytes. Using a microarray analysis, hyperpigmentary skin of melasma expressed high levels of Wnt inhibitory factor-1 (WIF-1) compared to perilesional normal skin. Objectives: In this study, we investigated the expression and functional role of WIF-1 in melanocytes. Methods: The expressions and fuctions of WIF-1 were assessed by Immunohistochemical staining, RT-PCR, western blot analysis, and immunocytochemical staining. Using a lentivirus system, WIF-1 was overexpressed in normal human melanocytes. siRNA system was used for WIF-1 downregulation. Ex vivo skin organ culture and promoter analysis were performed. Results: WIF-1 was expressed in both the melanocytes of normal human skin and in cultured melanocytes. The upregulation of WIF-1 on cultured normal human melanocytes significantly induced expressions of MITF and tyrosinase, which were associated with increased melanin content and tyrosinase activity. Consistent with the stimulatory effect of WIF-1, WIF-1 siRNA reduced melanogenesis in the cells. Moreover, WIF-1 increases pigmentation in melanocytes co-cultured with WIF-1 overexpressed fibroblasts and of organ-cultured human skin. Conclusion: These findings suggest that melanocytes express WIF-1 constitutively in vivo and in vitro and that WIF-1 promotes melanogenesis in normal human melanocytes. WIF-1 may have a role of increased melanogenesis in melanocytes of melasma skin.