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Isolation of Sterols from Cowpea (Vigna sinensis) Seeds and Their Promotion Activity on HO-1
( En Ji Cui ),( Ji Hae Park ),( Hee Jung Park ),( In Sik Chung ),( Ji Young Kim ),( Seung Woo Yeon ),( Nam In Baek ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.3
Cowpea (Vigna sinensis K.) seeds were extracted with 80% aqueous methanol. Concentrated extracts were partitioned with ethyl acetate, butanol, and H2O, successively. The repeated silica gel and octadecyl silica gel (ODS) column chromatographic separations for the butanol fraction led to isolation of four sterols, whose chemical structures were determined as 7β-hydroxysitosterol (1), 7α-hydroxysitosterol (2), 7-ketositosterol (3), and stigmasterol 3-O-β -D-glucopyranoside (4) from the interpretation of spectroscopic data including NMR, mass spectroscopy, and infrared spectroscopy (IR). This paper reports the first isolation of compounds 1 and 2 from V. sinensis seeds. All compounds were evaluated for the effect on heme oxygenase-1 (HO-1) expression, which is considered to be an antioxidant enzyme that catabolizes heme into carbon monoxide, free iron, and biliverdin. All sterols increased the expression of HO-1 in HepG2 cells.
Flavonoid Glycosides from Cowpea Seeds (Vigna sinensis K.) Inhibit LDL Oxidation
En-Ji Cui,송나영,Sabina Shrestha,정인식,김지영,정태숙,백남인 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.2
Six flavonoid glycosides were isolated from the n-butanol fraction of cowpea seeds (Vigna sinensis K.)through silica gel (SiO2) and octadecyl silica gel (ODS)column chromatographies. Based on their chemical structures determined via interpretation of spectroscopic data including NMR, MS, and IR, the compounds were identified as kaempferol 3-O-β-D-sophoroside (1), quercetin 3-O-β-Dsophoroside (2), isoquercitrin (3), hyperin (4), catechin 7-O-β-D-glucopyranoside (5), and quercetin 3-O-β-Dglucopyranosyl(1→6)-O-β-D-galactopyranoside (6). This is the first report of the isolation of these flavonoids from this plant. Among these flavonoids, compound 2, 5, and 6significantly inhibited LDL oxidation exhibiting 96.0±0.1(IC50: 3.9 μM), 96.8±1.7 (IC50: 2.9 μM), and 97.4±0.1%(IC50: 3.5 μM) inhibition, respectively, at a concentration of 40 μM.
Analysis of Prethrombotic States in Patients with Malignant Tumors
Cui, Lin,Sun, You-Hong,Chen, Jue,Wang, Lu,Liu, Jian-Jun,Zhou, Xiang-Rong,Ding, Jie,Liu, Xing-Xiang,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.13
Background: This study aimed to investigate the incidence and risk factors for a prethrombotic state in patients with malignant tumors. Materials and Methods: Plasma d-dimer (D-D) in patients with malignant tumors was measured. Abnormal rates of D-D and possible risk factors like gender, age, type of tumor, and staging of tumor were analyzed. Results: Of 1,453 patients, 629 demonstrated plasma D-D abnormality (43.3%). The D-D abnormal rate of male patients (n=851, 43.5%) was not statistically significantly different from that for female patients (n=602, 43.0%) (p>0.05). D-D abnormal rate increased with age and was statistically significant among different age groups (p<0.05). Regarding staging of tumor, D-D abnormal rate in patients with phase I was 2.0%, 6.2% in phase II, 47.6% in phase III and 83.1% in phase IV, with statistically significant differences between phase III and II, as well as phase III and IV (p<0.01). Conclusions: A prethrombotic state was closely related to malignancy of tumors. The risk factors for a prethrombotic state include age and tumor stage.
Cui, Lin,Liu, Xing-Xiang,Jiang, Yong,Wu, Xing-Jun,Liu, Jian-Jun,Zhou, Xiang-Rong,He, Xue-Jun,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12
Objective: To investigate the safety and efficacy of transcatheter arterial chemoembolization (TACE), combined with portal vein embolization (PVE), and high intensity focused ultrasound (HIFU) sequential therapy in treating patients with hepatocellular carcinoma (HCC). Methods: Patients with inoperative HCC were treated by two methods: in the study group with TACE first, then PVE a week later, and then TACE+PVE every two months as a cycle, after 2~3 cycles finally HIFU was given; in the control group only TACE+PVE was given. Response (CR+PR), and disease control rate (CR+PR+SD), side effects, overall survival and time to progress were calculated. Results: Main side effects of both groups were nausea and vomiting. No treatment related death occurred. In the study group, 32 patients received TACE for overall 67 times, PVE 64 times, and HIFU 99 times; on average 2.1, 2 and 3.1 times for each patient, respectively. In the control group, 36 patients were given TACE 78 times and PVE 74 times, averaging 2.2 and 2.1 times per patient. Effective rate: 25.0% in study group and 8.3% in control group (p>0.05). Disease control rates were 71.9% and 44.4%, respectively (p<0.05). In patients with portal vein tumor thrombus, the rate reduced over 1/2 after treatment was 69.2%(9/13) in the study and 21.4%(3/14) in the control group (p<0.05). Rate of AFP reversion or decrease over 1/2 was 66.7%(16/24) in study and 37%(10/27) (p<0.05) in control group. Median survival time: 16 months in study and 10 months in control group. PFS was 7months in study and 3 months in control group. Log-rank test suggested that statistically significant difference exists between two groups (p=0.024). 1-, 2- and 3-year survival rates were 56.3%, 18.8% and 9.3% in study, while 30.6%, 5.6% and 0 in control group, respectively, with statistically significant difference between two groups (by Log-rank, p = 0.014). Conclusions: The treatment of TACE+PVE+HIFU sequential therapy for HCC increases response rate, prolong survival, and could thus be a safe and effective treatment for advanced cases.
Cui, Lin,Liu, Xing-Xiang,Jiang, Yong,Liu, Jian-Jun,Zhou, Xiang-Rong,He, Xue-Jun,Chen, Jue,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.4
Objective: To evaluate clinical efficacy of a dose escalating schedule of paclitaxel concurrent with radiotherapy in treating patients with locally advanced non-small cell lung (NSCLC). Methods: Patients with locally advanced NSCLC were treated with conventional fractionated radiotherapy or three dimensional conformal radiotherapy (3 DCRT), concurrently with a dose escalating schedule of paclitaxel. All patients were divided into three groups, A with paclitaxel $30mg/m^2$, B with paclitaxel $60mg/m^2$ and C with paclitaxel $90mg/m^2$. Paclitaxel was repeated every week for a total of 4 or 6 weeks. Results: Among 109 patients, response rates were 68.8%, 71.1% and 71.8% (p>0.05) for group A (n=32), B (n=38), and C (n=39) respectively. Accordingly, disease control rates were 81.3%, 81.6% and 82.1% (p>0.05). Progression-free survival time was $8.0{\pm}5.0$ months, $11.6{\pm}6.1$ months, and $14.8{\pm}7.9$ months (p<0.05), respectively. Overall survival time was $15.4{\pm}7.6$ months, $18.2{\pm}8.0$ months, and $22.0{\pm}7.6$ months (p<0.05), one-year survival rates were 62.5%, 73.1% and 90.0% (p>0.05) and two-year survival rates were 31.3%, 38.5% and 50.0% (p<0.05). Main side-effects were bone marrow suppression, radiation related esophagitis and gastrointestinal reaction. Conclusion: In treating patients with NSCLC, concurrent chemoradiotherapy with paclitaxel improves early response compared with conventional fractionated radiotherapy or 3 DCRT. The survival rate was improved with the addition of paclitaxel, but there was an increase in adverse reactions when the dose of paclitaxel was increased.
Cui, Xu,Shih, En-Min,Jauregui, Luis A.,Chae, Sang Hoon,Kim, Young Duck,Li, Baichang,Seo, Dongjea,Pistunova, Kateryna,Yin, Jun,Park, Ji-Hoon,Choi, Heon-Jin,Lee, Young Hee,Watanabe, Kenji,Taniguchi, Tak American Chemical Society 2017 NANO LETTERS Vol.17 No.8
<P>Monolayer MoS2, among many other transition metal dichalcogenides, holds great promise for future applications in nanoelectronics and optoelectronics due to its ultrathin nature, flexibility, sizable band gap, and unique spin valley coupled physics. However, careful study of these properties at low temperature has been hindered by an inability to achieve low-temperature Ohmic contacts to monolayer MoS2, particularly at low carrier densities. In this work, we report a new contact scheme that utilizes cobalt (Co) with a monolayer of hexagonal boron nitride (h-BN) that has the following two functions: modifies the work function of Co and acts as a tunneling barrier. We measure a flat-band Schottky barrier of 16 meV, which makes thin tunnel barriers upon doping the channels, and thus achieve low-T contact resistance of 3 k Omega.mu m at a carrier density of 5.3 x 10(12)/cm(2). This further allows us to observe Shubnikov-de Haas oscillations in monolayer MoS2 at much lower carrier densities compared to previous work.</P>