http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
텍스트 데이터 분석을 통한 중국 라이브커머스 서비스 주요 이슈에 관한 연구
김시내 ( Kim¸ Sinae ),조현준 ( Cho¸ Hyun-jun ) 한국외국어대학교 중국연구소 2021 中國硏究 Vol.88 No.-
Live commerce is becoming a major consumption trend in China. In this study, related issues were derived and analyzed to understand live commerce in China. This study has used big data analysis methods such as text mining and network analysis for Chinese articles, under the framework of ‘agenda setting theory’. As a result of the analysis, five keywords, such as ‘platform’, ‘product’, ‘consumer’, ‘brand’, and ‘sales’ which are the core concepts of live commerce, appeared high in the frequency analysis. In the centrality analysis, among those five keywords, four keywords excluding ‘brand’ were found to be at the top. Finally, the following four research subject areas were derived by analyzing the co-occurrence of four keywords: 'platform', 'product', 'consumer', and 'sales', which appeared high in both frequency and centrality results. First, 'platform' refers to 'relationship between traffic, stars and purchases on the platform'; second, 'product' refers to 'companies change in product and brand marketing'; third, 'consumer' refers to 'consumer problem in the industry'; finally 'sales' refers to 'the impact of COVID-19 and the sales market'. The conclusions obtained through the analysis are as follows. First, live commerce plays a positive role in companies sales and PR activities, and companies are actively using it. Second, the live commerce service is receiving more attention in combination with the social issues of ‘Revitalizing the Rural Economy’. Chinese officials are also actively participating in the ‘Revitalizing the Rural Economy’ by using live commerce. Third, with the development of live commerce services, consumer problems are emerging. So the Chinese government is proposing related standards and institutions. Fourth, for a successful live commerce service, it is necessary to secure traffic. In addition, platform operation ability is required.
Dendritic Cell Dysfunction in Patients with End-stage Renal Disease
Kim, Ji Ung,Kim, Miyeon,Kim, Sinae,Nguyen, Tam Thanh,Kim, Eunhye,Lee, Siyoung,Kim, Soohyun,Kim, Hyunwoo 한국조명·전기설비학회 2017 한국조명·전기설비학회 학술대회논문집 Vol. No.
<P>End-stage renal disease (ESRD) with immune disorder involves complex interactions between the innate and adaptive immune responses. ESRD is associated with various alterations in immune function such as a reduction in polymorphonuclear leukocyte bactericidal activity, a suppression of lymphocyte proliferative response to stimuli, and a malfunction of cell-mediated immunity at the molecular level. ESRD also increases patients' propensity for infections and malignancies as well as causing a diminished response to vaccination. Several factors influence the immunodeficiency in patients with ESRD, including uremic toxins, malnutrition, chronic inflammation, and the therapeutic dialysis modality. The alteration of T-cell function in ESRD has been considered to be a major factor underlying the impaired adaptive cellular immunity in these patients. However, cumulative evidence has suggested that the immune defect in ESRD can be caused by an Ag-presenting dendritic cell (DC) dysfunction in addition to a T-cell defect. It has been reported that ESRD has a deleterious effect on DCs both in terms of their number and function, although the precise mechanism by which DC function becomes altered in these patients is unclear. In this review, we discuss the effects of ESRD on the number and function of DCs and propose a possible molecular mechanism for DC dysfunction. We also address therapeutic approaches to improve immune function by optimally activating DCs in patients with ESRD.</P>
Species Specific Antiviral Activity of Porcine Interferon-α8 (IFNα8)
Kim, Eunhye,Jhun, Hyunjhung,Kim, Joohee,Park, Unjoo,Jo, Seunghyun,Kwak, Areum,Kim, Sinae,Nguyen, Tam T.,Kang, Yongsun,Choi, Insoo,Lee, Joongbok,Kim, Heijun,Kim, Younghyun,Lee, Siyoung,Kim, Soohyun 한국조명·전기설비학회 2017 한국조명·전기설비학회 학술대회논문집 Vol. No.
<P>Interferons (IFNs) have been known as antiviral genes and they are classified by type 1, type 2, and type 3 IFN. The type 1 IFN consists of IFNα, IFNβ, IFNτ, and IFNω whereas the type 2 IFN consists of only IFNγ, which is a key cytokine driving T helper cell type 1 immunity. IFNλ belongs to the type 3 IFN, which is also known as IL-28 and IL-29 possessing antiviral activities. Type 1 IFN is produced by viral infection whereas type 2 IFN is induced by mitogenic or antigenic T-cell stimuli. The IFNτ of bovine was first discovered in an ungulate ruminant recognition hormone. IFNτ belongs to the type 1 IFN with the common feature of type 1 IFN such as antiviral activity. IFNs have been mostly studied for basic research and clinical usages therefore there was no effort to investigate IFNs in industrial animals. Here we cloned porcine IFNα8 from peripheral blood mononuclear cells of Korean domestic pig (<I>Sus scrofa domestica</I>). The newly cloned IFNα8 amino acid sequence from Korean domestic pig shares 98.4% identity with the known porcine IFNα8 in databank. The recombinant porcine IFNα8 showed potent antiviral activity and protected bovine Madin-Darby bovine kidney epithelial (MDBK) cells from the cytopathic effect of vesicular stomatitis virus, but it failed to protect human Wistar Institute Susan Hayflick (WISH) cells and canine Madin-Darby canine kidney epithelial-like (MDCK) cells. The present study demonstrates species specific antiviral activity of porcine IFNα8.</P>
Sinae Kim,Jong Ho Lee,Siyoung Lee,Saerok Shim,Tam T. Nguyen,Jihyeong Hwang,Heijun Kim,Yeo-Ok Choi,Jaewoo Hong,Suyoung Bae,Hyun Jhung Jhun,Hokee Yum,이영민,Edward D. Chan,Liping Yu,Tania Azam,Yong-Dae Kim 대한면역학회 2020 Immune Network Vol.20 No.5
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) is a positive-sense single-stranded RNA (+ssRNA) that causes coronavirus disease 2019 (COVID-19). The viral genome encodes twelve genes for viral replication and infection. The third open reading frame is the spike (S) gene that encodes for the spike glycoprotein interacting with specific cell surface receptor – angiotensin converting enzyme 2 (ACE2) – on the host cell membrane. Most recent studies identified a single point mutation in S gene. A single point mutation in S gene leading to an amino acid substitution at codon 614 from an aspartic acid 614 into glycine (D614G) resulted in greater infectivity compared to the wild type SARS-CoV2. We were interested in investigating the mutation region of S gene of SARS-CoV2 from Korean COVID-19 patients. New mutation sites were found in the critical receptor binding domain (RBD) of S gene, which is adjacent to the aforementioned D614G mutation residue. This specific sequence data demonstrated the active progression of SARS-CoV2 by mutations in the RBD of S gene. The sequence information of new mutations is critical to the development of recombinant SARS-CoV2 spike antigens, which may be required to improve and advance the strategy against a wide range of possible SARS-CoV2 mutations.
A Novel Culture Technique for Human Embryonic Stem Cells Using Porous Membranes
Kim, Sinae,Ahn, Seong Eun,Lee, Jae Ho,Lim, Do-Seon,Kim, Kwang-Soo,Chung, Hyung-Min,Lee, Soo-Hong Wiley (John WileySons) 2007 Stem Cells Vol.25 No.10
<P>We have developed a novel culture technique for human embryonic stem cells (hESCs) using a porous membrane with feeder cells. The feeder cells were seeded and attached to the bottom of a porous membrane and, subsequently, hESCs were cultured on the top of the membrane. This porous membrane technique (PMT) allowed hESCs to be successfully cultured and to be effectively and efficiently separated from the feeder cell layer without enzyme treatment. hESCs being cultured by PMT were observed to interact with feeder cells through pores of membrane, where the interaction was dependent on the pore size of the membrane used. It was also revealed that the number of attached hESC colonies depended on the concentration of feeder cells on the bottom of the membrane. On the other hand, hESC colonies did not attach to porous membrane, as feeder cells were in the presence of culture dish, not the porous membrane. The hESCs cultured on porous membranes not only exhibited expression of several undifferentiated markers and a normal karyotype, but they also formed teratomas consisting of three germ layers in in vivo study. Compared with the mechanical isolation technique conventionally used, PMT significantly decreased mouse vimentin gene expression in cultured hESCs. Thus, a PMT for hESC culture would be a useful tool to exclude enzyme treatment and to reduce contamination from feeder cells simultaneously. Disclosure of potential conflicts of interest is found at the end of this article.</P>
microRNA-155 positively regulates glucose metabolism via PIK3R1-FOXO3a-cMYC axis in breast cancer
Kim, Sinae,Lee, Eunji,Jung, Jaeyun,Lee, Jong Won,Kim, Hee Jung,Kim, Jisun,Yoo, Hyun ju,Lee, Hee Jin,Chae, Sun Young,Jeon, Sang Min,Son, Byung Ho,Gong, Gyungyup,Sharan, Shyam K,Chang, Suhwan Nature Publishing Group UK 2018 Oncogene Vol.37 No.22
<P>MicroRNA is an endogenous, small RNA controlling multiple target genes and playing roles in various biological processes including tumorigenesis. Here, we addressed the function of miR-155 using LC-MS/MS-based metabolic profiling of miR-155 deficient breast cancer cells. Our results revealed the loss of miR-155 hampers glucose uptake and glycolysis, via the down-regulation of glucose transporters and metabolic enzymes including HK2, PKM2, and LDHA. We showed this is due to the down-regulation of cMYC, controlled through phosphoinositide-3-kinase regulatory subunit alpha (PIK3R1)-PDK1/AKT-FOXO3a pathway. UTR analysis of the PIK3R1 and FOXO3a indicated miR-155 directly represses these genes. A stable expression of miR-155 in patient-derived cells (PDCs) showed activated glucose metabolism whereas a stable inhibition of miR-155 reduced in vivo tumor growth with retarded glucose metabolism. Furthermore, analysis of 50 triple-negative breast cancer (TNBC) specimens and specific uptake value (SUV) of PET images revealed a positive correlation between miR-155 level and glucose usage in human breast tumors via PIK3R1-PDK/AKT-FOXO3a-cMYC axis. Collectively, these data demonstrate the miR-155 is a key regulator of glucose metabolism in breast cancer.</P>
Kim, Min Jung,Park, Ji Sun,Kim, Sinae,Moon, Sung-Hwan,Yang, Han Na,Park, Keun-Hong,Chung, Hyung-Min Mary Ann Liebert 2011 STEM CELLS AND DEVELOPMENT Vol.20 No.8
<P>Bone tissue defects caused by trauma and disease are significant problems in orthopedic surgery. Human embryonic stem cells (hESCs) hold great promise for the treatment of bone tissue disease in regenerative medicine. In this study, we have established an effective method for the differentiation of osteogenic cells derived from hESCs using a lentiviral vector containing the transcription factor Cbfa1. Differentiation was initiated in embryoid body formation of Cbfa1-expressing hESCs, resulting in a highly purified population of osteogenic cells based on flow cytometric analysis. These cells also showed characteristics of osteogenic cells in vitro, as determined by reverse-transcription (RT)-polymerase chain reaction and immunocytochemistry using osteoblast-specific markers. We also evaluated the regenerative potential of Cbfa1-expressing cells derived from hESCs (hESC-CECs) compared with hESCs and the osteogenic effects of bone morphogenic protein-2 (BMP2) encapsulated in thermoreversible hydrogel in vivo. hESC-CECs were embedded in hydrogel constructs enriched with BMP2 to promote bone regeneration. We observed prominent mineralization and the formation of nodule-like structures using von Kossa and alizarin red S staining. In addition, the expression patterns of osteoblast-specific genes were verified by RT-polymerase chain reaction, and immunohistochemical analysis revealed that collagen type 1 and Cbfa1 were highly expressed in hESC-CECs compared with other cell types. Taken together, our results suggest that encapsulation of hESC-CECs with BMP2 in hydrogel constructs appears to be a promising method to enhance the in vitro osteoblastic differentiation and in vivo osteogenic activity of hESC-CECs.</P>
Kim Sinae,Nguyen Tam T.,Taitt Afeisha S.,전현정,Park Ho-Young,Kim Sung-Han,Kim Yong-Gil,Song Eun Young,Lee Youngmin,Yum Hokee,Shin Kyeong-Cheol,Choi Yang Kyu,송창선,Yeom Su Cheong,Kim Byoungguk,Netea Mihai 대한면역학회 2021 Immune Network Vol.21 No.6
Recently, a new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (B.1.1.529) Omicron variant originated from South Africa in the middle of November 2021. SARS-CoV-2 is also called coronavirus disease 2019 (COVID-19) since SARS-CoV-2 is the causative agent of COVID-19. Several studies already suggested that the SARS-CoV-2 Omicron variant would be the fastest transmissible variant compared to the previous 10 SARS-CoV-2 variants of concern, interest, and alert. Few clinical studies reported the high transmissibility of the Omicron variant but there is insufficient time to perform actual experiments to prove it, since the spread is so fast. We analyzed the SARS-CoV-2 Omicron variant, which revealed a very high rate of mutation at amino acid residues that interact with angiostatin-converting enzyme 2. The mutation rate of COVID-19 is faster than what we prepared vaccine program, antibody therapy, lockdown, and quarantine against COVID-19 so far. Thus, it is necessary to find better strategies to overcome the current crisis of COVID-19 pandemic.