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Kang, Chan Woo,Jang, Kang Won,Sohn, Jinyoung,Kim, Sung-Moo,Pyo, Kyoung-Ho,Kim, Hwan,Yun, Mi Ran,Kang, Han Na,Kim, Hye Ryun,Lim, Sun Min,Moon, Yong Wha,Paik, Soonmyung,Kim, Dae Joon,Kim, Joo Hang,Cho, American Association for Cancer Research 2015 Molecular Cancer Therapeutics Vol.14 No.10
<P><I>RET</I> rearrangement is a newly identified oncogenic mutation in lung adenocarcinoma (LADC). Activity of dovitinib (TKI258), a potent inhibitor of FGFR, VEGFR, and PDGFR, in <I>RET</I>-rearranged LADC has not been reported. The aims of the study are to explore antitumor effects and mechanisms of acquired resistance of dovitinib in <I>RET</I>-rearranged LADC. Using structural modeling and <I>in vitro</I> analysis, we demonstrated that dovitinib induced cell-cycle arrest at G<SUB>0</SUB>–G<SUB>1</SUB> phase and apoptosis by selective inhibition of RET kinase activity and ERK1/2 signaling in <I>RET</I>-rearranged LC-2/ad cells. Strong antitumor effect of dovitinib was observed in an LC-2/ad tumor xenograft model. To identify the acquired resistance mechanisms to dovitinib, LC-2/ad cells were exposed to increasing concentrations of dovitinib to generate LC-2/ad DR cells. Gene-set enrichment analysis of gene expression and phosphor-kinase revealed that Src, a central gene in focal adhesion, was activated in LC-2/ad DR cells. Saracatinib, an src kinase inhibitor, suppressed ERK1/2 phosphorylation and growth of LC-2/ad DR cells. Taken together, these findings suggest that dovitinib can be a potential therapeutic option for <I>RET</I>-rearranged LADC, in which acquired resistance to dovitinib can be overcome by targeting Src. <I>Mol Cancer Ther; 14(10); 2238–48. ©2015 AACR</I>.</P>
Chemical Transformation of Human Keratinocytes by 2,3,7,8-Tetrachlorodibenxo-$\rho$-dioxin
Kang, Mi-Kyung,Choi, Young-Sill,Ryeom, Tai-Kyung,Eom, Mi-Ok,Park, Mi-Sun,Jee, Seung-Won,Kim, Kang-Ryune,Kim, Ok-Hee,Kang, Ho-Il Korean Environmental Mutagen Society 2006 한국환경성돌연변이·발암원학회지 Vol.26 No.3
2,3,7,8-Tetrachlorodibenzo-$\rho$-dioxin(TCDD) is a ubiquitous, persistent environmental contaminant and the most powerful carcinogen categorized by IARC. Although the mechanism of carcinogenesis by TCDD is poorly understood, several studies have shown that the skin is one of target organs far TCDD. In this study, we investigated the neoplastic transformation of human keratinocyte-derived cell line, HaCaT, by chemical transformation method using N-methyl-N'-nitro-N-nitrorsoguanidine(MNNG) and TCDD. We found that subsequent exposure to TCDD for 3 weeks after initial exposure to MNNG markedly induced transformed cells. It was suggested that TCDD can act as a potent promoter in HaCaT cells. Furthermore, these transformed cells showed morphological alternations in soft agar and increased telomerase activity. Therefore, the TCDD treatment of HaCaT cells by initiated with MNNG could promote neoplastic transformation without stimulation by exogenous growth factors. As a result, TCDD had a strong potency as a promoter in nontumorigenic immortalized human epidermal keratinocytes.
유리용융시 Nepheline Stone 생성에 관한 연구
강상훈,이경희,강원호 明知大學校 産業技術硏究所 1989 産業技術硏究所論文集 Vol.8 No.-
The formation of the Nepheline stone come from fusion-cast AZS Refractory and fusion-cast allumina Refractory which are use in Glass Melting Tank was investigated according to temperature variation. The results were Nephline Stone was formed easily with fused AZS Refractory in comparison with fused-cast Alumina Refractory below 1400℃ , Pendrite stone appeared with Nepheline at 1400℃ which comes from the fusion-cast AES Refractory and conrandum were found at 1500℃ comes from the fusion-cast Alumina Refractory.
Kang, Seung-Mi,Jung, Hee-Young,Kang, Young-Min,Min, Ji-Yun,C.S. Karigar,,Yang, Jae-Kyung,Kim, Sun-Won,Ha, Yeong-Rae,Lee, Sung-Ho Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.
Cell suspension cultures of Capsicum annum L. cv. P1482 were fed with exogenous ferulic acid to monitor their biotransformation abilities. A portion of the ferulic acid was biotransformed into vanillin, a major natural flavor, and capsaicin, a principle secondary metabolite characteristic of Capsicum species. The cellular vanillin concentrations were relatively higher than capsaicin levels and were maximal (2 mg/g DW) 4 days after 0.6 mM ferulic acid feeding. Maximal vanillin levels in the culture medium were 10mg/L at 4 and 3 days after feeding with 1.25 and 2.5 mM ferulic acid, respectively. With regard to capsaicin levels, the cellular levels were slightly decreased by ferulic acid feeding, whereas the levels in the culture medium were increased. Ferulic acid feeding not only enhanced vanillin and capsaicin production but also increased the concentrations of other phenylpropanoid metabolites.
Kang, Ho Won,Lee, Sang Keun,Kim, Won Tae,Kim, Yong-June,Yun, Seok-Joong,Lee, Sang-Cheol,Kim, Wun-Jae Mary Ann Liebert 2014 Journal of endourology Vol.28 No.8
<P>Purpose: To assess the association between dyslipidemia and urolithiasis, a propensity score-matching study was performed. Patients and Methods: Fasting blood samples were taken, and serum lipid profiles were measured in 655 stone formers (SF) and 1965 propensity score-matched controls between 2005 and 2011. The controls, from a health-screening program, did not have a history of dyslipidemia or statin use and have any evidence of stone disease, as determined by abdominal radiography, ultrasonography examination. Propensity score-matching with respect to age, sex, and body mass index was used to minimize selection bias, and the logistic regression analysis was adjusted for other components of metabolic syndrome. Results: Compared with controls, the SF group had significantly higher mean triglyceride and lower total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol levels (each P < 0.001). The SF group was also more likely to have hypertriglyceridemia and low HDL-cholesterolemia, and less likely to have hypercholesterolemia and high LDL cholesterolemia compared with controls (each P< 0.05). When adjusted for other components of metabolic syndrome including obesity, presence of diabetes mellitus or hypertension, the odds ratio (OR) for urinary stones appeared with hypercholesterolemia (OR= 0.747, P = 0.003), hypertriglyceridemia (OR= 1.901, P < 0.001), low HDL cholesterolemia (OR= 1.886, P < 0.001) and high LDL cholesterolemia (OR= 0.610, P < 0.001). Conclusions: Our study implies that dyslipidemia may play a crucial part in urinary stone risk.</P>
Views of physiatrists and physical therapists on the use of gait-training robots for stroke patients
Kang, Chang Gu,Chun, Min Ho,Chang, Min Cheol,Kim, Won,Hee Do, Kyung The Society of Physical Therapy Science 2016 JOURNAL OF PHYSICAL THERAPY SCIENCE Vol.28 No.1
<P>[Purpose] Gait-training robots have been developed for stroke patients with gait disturbance. It is important to survey the views of physiatrists and physical therapists on the characteristics of these devices during their development. [Subjects and Methods] A total of 100 physiatrists and 100 physical therapists from 38 hospitals participated in our questionnaire survey. [Results] The most common answers about the merits of gait-training robots concern improving the treatment effects (28.5%), followed by standardizing treatment (19%), motivating patients about treatment (17%), and improving patients’ self-esteem (14%). The subacute period (1–3 months post-stroke onset) was most often chosen as the ideal period (47.3%) for the use of these devices, and a functional ambulation classification of 0–2 was the most selected response for the optimal patient status (27%). The preferred model was the treadmill type (47.5%) over the overground walking type (40%). The most favored commercial price was $50,000–$100,000 (38.3%). The most selected optimal duration for robot-assisted gait therapy was 30–45 min (47%), followed by 15–30 min (29%), 45–60 min (18%), ≥ 60 min (5%), and < 15 min (1%). [Conclusion] Our study findings could guide the future designs of more effective gait-training robots for stroke patients.</P>
Effect of Renal Insufficiency on Stone Recurrence in Patients with Urolithiasis
Kang, Ho Won,Seo, Sung Phil,Kim, Won Tae,Kim, Yong-June,Yun, Seok-Joong,Lee, Sang-Cheol,Kim, Wun-Jae The Korean Academy of Medical Sciences 2014 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.29 No.8
<P>The study was designed to assess the relationship between glomerular filtration rate (GFR) and urinary stone-forming constituents, and to assess the effect of renal insufficiency on stone recurrence risk in first stone formers (SF). Baseline serum creatinine levels were obtained, and renal insufficiency was defined as creatinine clearance ≤60 mL/min (Cockroft-Gault). This retrospective case-control study consists of 342 first SF; 171 SF with normal renal function were selected with 1:1 propensity scores matched to 171 SF with renal insufficiency. Urinary metabolic evaluation was compared to renal function. GFR was positively correlated with urinary calcium, uric acid, and citrate excretion. Subjects with renal insufficiency had significantly lower urinary calcium, uric acid, and citrate excretion than those with normal renal function, but not urine volume. With regard to urinary metabolic abnormalities, similar results were obtained. SF with renal insufficiency had lower calcium oxalate supersaturation indexes and stone recurrence rates than SF with normal renal function. Kaplan-Meier curves showed similar results. In conclusion, GFR correlates positively with urinary excretion of stone-forming constituents in SF. This finding implies that renal insufficiency is not a risk factor for stone recurrence.</P><P><B>Graphical Abstract</B></P><P/>