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( Sung-soo Park ),( Seul Ki Lim ),( Jieun Lee ),( Hyo Kyeong Park ),( Min-sung Kwon ),( Misun Yun ),( Namhee Kim ),( Young Joon Oh ),( Hak-jong Choi ) 한국미생물 · 생명공학회 2021 Journal of microbiology and biotechnology Vol.31 No.11
Obesity and related metabolic diseases are major problems worldwide. Some probiotics are currently considered potential therapeutic strategies for obesity. We aimed to investigate the anti-obesity efficacy of Latilactobacillus sakei WIKIM31 in obese mice induced by a high fat diet. The administration of a high-fat diet with L. sakei WIKIM31 reduced body weight gain, epididymal fat mass, triglyceride and total cholesterol levels in the blood, and remarkably decreased the expression of lipogenesis-related genes in the epididymal adipose tissue and liver. Interestingly, intake of L. sakei WIKIM31 improved gut barrier function by increasing the gene expression of tight junction proteins and suppressing the inflammatory responses. Additionally, L. sakei WIKIM31 enhanced the production of short-chain fatty acids, such as butyrate and propionate, in the intestinal tract. These results showed that L. sakei WIKIM31 can be used as a potential therapeutic probiotic for obesity.
Kim, Jieun,Kim, Su Mi,Seo, Jeong Eun,Choi, Min Gew,Lee, Jun Ho,Sohn, Tae Sung,Kim, Sung,Bae, Jae Moon,Seo, Seong Il The Korean Gastric Cancer Association 2014 Journal of gastric cancer Vol.14 No.3
We report our experience of a concurrent robot assisted distal gastrectomy and partial nephrectomy for synchronous early gastric cancer and renal cell carcinoma. A 55-year-old female patient was diagnosed with early gastric cancer on screening endoscopy. Abdominal computed tomography showed an incidental right renal cell carcinoma. Robot assisted distal gastrectomy was performed, followed by partial nephrectomy. The final pathological examination showed signet ring cell carcinoma within the lamina propria and renal cell carcinoma with negative resection margins. The patient showed no evidence of recurrence at 6-months. A robot-assisted combined operation could be a treatment option for early stages of synchronous malignancies.
Choi, Jieun,Kim, Man-Ho,Han, Jun Young,Chae, Ji Eon,Lee, Won Hee,Lee, Young Moo,Lee, So Young,Jang, Jong Hyun,Kim, Jin Young,Henkensmeier, Dirk,Yoo, Sung Jong,Sung, Yung-Eun,Kim, Hyoung-Juhn Elsevier 2018 Journal of membrane science Vol.568 No.-
<P><B>Abstract</B></P> <P>In this report, we introduced spirobiindane group to poly(arylene ether sulfone) (PES) to build the structure of polymers with intrinsic microporosity (PIMs). A novel PESs (QOH-SBIs), which have spirobiindane and tetra(quaternary ammonium) hydroxide pendant moieties, were synthesized for anion-conducting binder material in membrane electrode assembly (MEA) of solid alkaline exchange membrane fuel cell (SAEMFC). The time-lag method was used to check the high gas permeability of the polymers. The high permeability is due to the micro-pores at the molecular level that is formed by the difference in chain thicknesses between two alternating units, thick spirobiindane group and thin arylene ether sulfone group. QOH-SBIs shows a semi-rigid chain conformation in a solution. The inter-chain spacing and chain conformation were measured with wide angle X-ray diffraction (WAXD) and small angle neutron scattering (SANS), respectively. High gas permeability directly affected the performance of SAEMFC. The MEA with spirobiindane-modified PES shows much higher maximum power density than that of spirobiindane-free PESs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Spiro moieties were introduced to PESs to design polymers of intrinsic microporosity. </LI> <LI> Difference in chain thickness create microporous channels for gas diffusion. </LI> <LI> Inter-chain spacing and chain conformation were calculated from with WAXD and SANS. </LI> <LI> Enhancing gas permeability of the electrode binder improved the cell performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Cho, Sung-Yup,Chae, Jeesoo,Na, Deukchae,Kang, Wonyoung,Lee, Ahra,Min, Seoyeon,Kang, Jinjoo,Choi, Boram,Lee, Jieun,Sung, Chang Ohk,Chuang, Jeffrey H.,Lee, Charles,Lee, Won-Suk,Park, Hansoo,Kim, Jong-Il American Association for Cancer Research 2019 Clinical Cancer Research Vol.25 No.9
<P><B>Purpose:</B></P><P>Genomic and transcriptomic alterations during metastasis are considered to affect clinical outcome of colorectal cancers, but detailed clinical implications of metastatic alterations are not fully uncovered. We aimed to investigate the effect of metastatic evolution on <I>in vivo</I> treatment outcome, and identify genomic and transcriptomic alterations associated with drug responsiveness.</P><P><B>Experimental Design:</B></P><P>We developed and analyzed patient-derived xenograft (PDX) models from 35 patients with colorectal cancer including 5 patients with multiple organ metastases (MOMs). We performed whole-exome, DNA methylation, and RNA sequencing for patient and PDX tumors. With samples from patients with MOMs, we conducted phylogenetic and subclonal analysis and <I>in vivo</I> drug efficacy test on the corresponding PDX models.</P><P><B>Results:</B></P><P>Phylogenetic analysis using mutation, expression, and DNA methylation data in patients with MOMs showed that mutational alterations were closely connected with transcriptomic and epigenomic changes during the tumor evolution. Subclonal analysis revealed that initial primary tumors with larger number of subclones exhibited more dynamic changes in subclonal architecture according to metastasis, and loco-regional and distant metastases occurred in a parallel or independent fashion. The PDX models from MOMs demonstrated therapeutic heterogeneity for targeted treatment, due to subclonal acquisition of additional mutations or transcriptomic activation of bypass signaling pathway during tumor evolution.</P><P><B>Conclusions:</B></P><P>This study demonstrated <I>in vivo</I> therapeutic heterogeneity of colorectal cancers using PDX models, and suggests that acquired subclonal alterations in mutations or gene expression profiles during tumor metastatic processes can be associated with the development of drug resistance and therapeutic heterogeneity of colorectal cancers.</P>
( Han-sung Kwon ),( Seo-yeon Kim ),( Jieun Park ),( Han-sung Hwang ),( In-sook Sohn ) 대한주산의학회 2017 Perinatology Vol.28 No.4
Objective: To compare perinatal outcomes of gestational diabetic women with a family history of type 2 diabetes mellitus (DM), who were diagnosed through early or late screening. Methods: After 2010, women with a family history of DM underwent 2-step screening at the initial visit, mostly before 16 weeks of gestation. The perinatal outcomes were compared with those of historical cohort screened at 24-28 weeks of gestation between 2005 and 2009. The primary outcomes were complications associated with maternal hyperglycemia such as primary cesarean delivery, large for gestational age (LGA), neonatal hypoglycemia, and fetal anomaly. Results: The risk of gestational diabetes mellitus (GDM) was 20.8% (67/322) in women with a history of DM in a first-degree relative. Women who were screened before 16 weeks of gestation were more likely to have a high level of hemoglobin A1C at diagnosis and receive insulin therapy for glycemic control than the Late-screen group. But odds ratios of LGA, primary cesarean delivery and fetal anomalies compared with normal control were highest in the Late-screen group than in the Early screen group and the Low risk GDM group. Conclusion: Some perinatal outcomes may be more favorable in women with GDM and a family history of DM who were screened before 16 weeks of gestation rather than routinely.
Cho, Sung-Yup,Sung, Chang Ohk,Chae, Jeesoo,Lee, Jieun,Na, Deukchae,Kang, Wonyoung,Kang, Jinjoo,Min, Seoyeon,Lee, Ahra,Kwak, Eunhye,Kim, Jooyoung,Choi, Boram,Kim, Hyunsoo,Chuang, Jeffrey H.,Pak, Hyo-Ky American Society of Hematology 2018 Blood Vol.131 No.17
<P>Epstein-Barr virus (EBV)-positive diffuse large B-cell lymphomas (EBV1-DLBLs) tend to occur in immunocompromised patients, such as the elderly or those undergoing solid organ transplantation. The pathogenesis and genomic characteristics of EBV1-DLBLs are largely unknown because of the limited availability of human samples and lack of experimental animal models. We observed the development of 25 human EBV1-DLBLs during the engraftment of gastric adenocarcinomas into immunodeficient mice. An integrated genomic analysis of the human-derived EBV1-DLBLs revealed enrichment ofmutations in Rho pathway genes, including RHPN2, and Rho pathway transcriptomic activation. Targeting the Rho pathway using a Rho-associated protein kinase (ROCK) inhibitor, fasudil, markedly decreased tumorgrowth inEBV1-DLBL patient-derived xenograft (PDX) models. Thus, alterations in the Rho pathway appear to contribute to EBV-induced lymphomagenesis in immunosuppressed environments.</P>
Lee, Jieun,Cho, Sung-Min,Kim, Min Sung,Lee, Sug Hyung,Chung, Yeun-Jun,Jung, Seung-Hyun Korea Genome Organization 2017 Genomics & informatics Vol.15 No.1
Tumor tissues from biopsies or surgery are major sources for the next generation sequencing (NGS) study, but these procedures are invasive and have limitation to overcome intratumor heterogeneity. Recent studies have shown that driver alterations in tumor tissues can be detected by liquid biopsy which is a less invasive technique capable of both capturing the tumor heterogeneity and overcoming the difficulty in tissue sampling. However, it is still unclear whether the driver alterations in liquid biopsy can be detected by targeted NGS and how those related to the tissue biopsy. In this study, we performed whole-exome sequencing for a breast cancer tissue and identified PTEN p.H259fs*7 frameshift mutation. In the plasma DNA (liquid biopsy) analysis by targeted NGS, the same variant initially identified in the tumor tissue was also detected with low variant allele frequency. This mutation was subsequently validated by digital polymerase chain reaction in liquid biopsy. Our result confirm that driver alterations identified in the tumor tissue were detected in liquid biopsy by targeted NGS as well, and suggest that a higher depth of sequencing coverage is needed for detection of genomic alterations in a liquid biopsy.
TopBP1 deficiency impairs V(D)J recombination during lymphocyte development.
Kim, Jieun,Lee, Sung Kyu,Jeon, Yoon,Kim, Yehyun,Lee, Changjin,Jeon, Sung Ho,Shim, Jaegal,Kim, In-Hoo,Hong, Seokmann,Kim, Nayoung,Lee, Ho,Seong, Rho Hyun Published for the European Molecular Biology Organ 2014 The EMBO journal Vol.33 No.3
<P>TopBP1 was initially identified as a topoisomerase II-β-binding protein and it plays roles in DNA replication and repair. We found that TopBP1 is expressed at high levels in lymphoid tissues and is essential for early lymphocyte development. Specific abrogation of TopBP1 expression resulted in transitional blocks during early lymphocyte development. These defects were, in major part, due to aberrant V(D)J rearrangements in pro-B cells, double-negative and double-positive thymocytes. We also show that TopBP1 was located at sites of V(D)J rearrangement. In TopBP1-deficient cells, γ-H2AX foci were found to be increased. In addition, greater amount of γ-H2AX product was precipitated from the regions where TopBP1 was localized than from controls, indicating that TopBP1 deficiency results in inefficient DNA double-strand break repair. The developmental defects were rescued by introducing functional TCR αβ transgenes. Our data demonstrate a novel role for TopBP1 as a crucial factor in V(D)J rearrangement during the development of B, T and iNKT cells.</P>