101
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Li J, Hu GH, Kong FJ, Wu KM, He B, Song K, Sun WJ. Reduced STMN1 expression induced by RNA interference inhibits the bioactivity of pancreatic cancer cell line Panc-1. Neoplasma 2014; 61:144-52. [PMID: 24299310 DOI: 10.4149/neo_2014_020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Increased expression of STMN1 has been observed in many tumor forms, but its expression and potential biological role in pancreatic cancer is still unknown. In this study, we demonstrated that STMN1 was expressed to a large extent in pancreatic cancer tissues and cell lines as compared to normal pancreatic tissues. Suppression of STMN1 expression via transfection with STMN1-specific siRNA could not only significantly inhibit the proliferation, migration and invasion ability of Panc-1 cells, but also enhance the apoptosis of Panc-1 cells. In addition, downregulation of STMN1 obviously enhanced the acetylation level of α-tubulin. All these results indicated that STMN1 plays an important role in pancreatic cancer development, and might serve as a potential therapeutic target for pancreatic cancer.
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102
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Ahn H, Song B, Sohn S, Lee M, Song K, Jee K. Application of a wet oxidation method for the quantification of 3H and 14C in low-level radwastes. Appl Radiat Isot 2013; 81:62-6. [DOI: 10.1016/j.apradiso.2013.03.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 03/12/2013] [Indexed: 10/26/2022]
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103
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Hong Z, Song K, Story M, Cho J. An Experimental Model-Based Biomarker Exploration of Radiation-Induced Lung Injury In Vivo and In Vitro. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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104
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Luo H, Song K, Zhang RH, Zhou K. Pulsed re-sampling of cued object during 'inhibition of return': new behavioral evidence. J Vis 2013. [DOI: 10.1167/13.9.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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105
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Verweij EJ, Jacobsson B, van Scheltema PA, de Boer MA, Hoffer MJV, Hollemon D, Westgren M, Song K, Oepkes D. European non-invasive trisomy evaluation (EU-NITE) study: a multicenter prospective cohort study for non-invasive fetal trisomy 21 testing. Prenat Diagn 2013; 33:996-1001. [PMID: 23794121 DOI: 10.1002/pd.4182] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Revised: 06/04/2013] [Accepted: 06/17/2013] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To evaluate the performance of a directed non-invasive prenatal testing method of cell-free DNA analysis for fetal trisomy 21 (T21) by shipping the whole blood samples from Europe to a laboratory in the USA. METHODS A European multicenter prospective, consecutive cohort study was performed enrolling pregnant women from Sweden and the Netherlands. Blood samples were drawn just prior to a planned of invasive diagnostic procedure in a population at increased risk for fetal T21 and then shipped to the USA without any blood processing. Chromosome-selective sequencing was carried out on chromosome 21 with reporting high risk or low risk of T21. Karyotyping or rapid aneuploidy detection was used as the clinical reference standard. RESULTS Of the 520 eligible study subjects, a T21 test result was obtained in 504/520 (96.9%). Risk assessment was accurate in 503/504 subjects (99.8%). There was one false negative result for T21 (sensitivity 17/18, 94.4%, and specificity 100%). CONCLUSION This is the first prospective European multicenter study showing that non-invasive prenatal testing using directed sequencing of cell-free DNA applied to blood samples shipped across the Atlantic Ocean, is highly accurate for assessing risk of fetal T21.
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106
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Ouyang L, Song K, Solberg T, Wang J. WE-G-134-03: A Moving Blocker System for Cone-Beam Computed Tomography Scatter Correction. Med Phys 2013. [DOI: 10.1118/1.4815672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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107
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Pidikiti R, Stojadinovic S, Song K, Speiser M, Solberg T. WE-E-108-06: Demonstration of a CBCT Based Monte Carlo Model for Small Animal Treatment Planning. Med Phys 2013. [DOI: 10.1118/1.4815584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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108
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Pidikiti R, Stojadinovic S, Song K, Speiser M, Solberg T. WE-E-108-05: Evaluation of the XRAD 225Cx MC Source Model in Heterogeneous Mediums. Med Phys 2013. [DOI: 10.1118/1.4815583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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109
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Mao W, Huang C, Kearney V, Song K, Christensen P, Sun X, Hao Y, Solberg T. WE-E-108-01: BEST IN PHYSICS (THERAPY) - Radiotherapy Enhancement with a Novel Class of Hollow Nanoconstructs. Med Phys 2013. [DOI: 10.1118/1.4815579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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110
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Jung SH, Daub KJ, Yeon JW, Choi KS, Choi J, Yang H, Lee DH, Song K. Investigation on exceptional fuel CRUD samples by using radioactivity ratios of cobalt isotopes. Appl Radiat Isot 2013; 81:307-9. [PMID: 23582497 DOI: 10.1016/j.apradiso.2013.03.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Accepted: 03/13/2013] [Indexed: 11/16/2022]
Abstract
Elemental analysis and radioactivity measurements were carried out for fuel CRUD samples obtained from a nuclear power plant. Comparisons were made for the relationship between (58)Co radioactivity and Ni content and for the radioactivity ratios of (58)Co to (60)Co of the samples. We found a peculiar radioactivity relationship from one of the samples and were able to further evaluate this based on its unique fuel exchange history. This analysis can be useful to enhance the data credibility of CRUD samples.
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111
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Poon LCY, Musci T, Song K, Syngelaki A, Nicolaides KH. Maternal plasma cell-free fetal and maternal DNA at 11-13 weeks' gestation: relation to fetal and maternal characteristics and pregnancy outcomes. Fetal Diagn Ther 2013; 33:215-23. [PMID: 23466432 DOI: 10.1159/000346806] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 01/04/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To examine the possible relationship between maternal and fetal characteristics and pregnancy outcomes on fetal and maternal cell-free (cf) DNA in maternal plasma at 11-13 weeks' gestation. METHODS cfDNA was extracted from maternal plasma of 1,949 singleton pregnancies and chromosome-selective sequencing was used to determine the proportion of cfDNA and total cfDNA counts which was of fetal and maternal origin. Multivariate regression analysis was used to determine whether specific maternal and fetal characteristics and pregnancy complications, such as preeclampsia (PE), early spontaneous preterm birth (SPB) and delivery of small for gestational age (SGA) neonates, were significant predictors of fetal and maternal cfDNA in maternal plasma. RESULTS The fetal and maternal cfDNA plasma concentration increased with serum pregnancy-associated plasma protein-A and free β-human chorionic gonadotropin level, was higher in women of Afro-Caribbean and East-Asian racial origin than in Caucasians, and lower in smokers, but it was not significantly altered in pregnancies complicated by PE, SPB or SGA. The fetal cfDNA level was inversely related to maternal weight and uterine artery pulsatility index, and maternal cfDNA increased with maternal weight. CONCLUSIONS The fetal and maternal cfDNA level in maternal plasma is affected by maternal and fetal characteristics, but it is not altered in pregnancy complications.
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112
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Wang L, Song K, Qu X, Wang H, Zhu H, Xu X, Zhang M, Tang Y, Yang X. hTERT Gene Immortalized Human Adipose-Derived Stem Cells and its Multiple Differentiations: a Preliminary Investigation. Appl Biochem Biotechnol 2013; 169:1546-56. [DOI: 10.1007/s12010-012-0019-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Accepted: 12/04/2012] [Indexed: 01/19/2023]
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113
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Ashoor G, Syngelaki A, Wang E, Struble C, Oliphant A, Song K, Nicolaides KH. Trisomy 13 detection in the first trimester of pregnancy using a chromosome-selective cell-free DNA analysis method. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2013; 41:21-25. [PMID: 22996646 DOI: 10.1002/uog.12299] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/29/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To assess the performance of chromosome-selective sequencing of maternal plasma cell-free DNA (cfDNA) in non-invasive prenatal testing for trisomy 13. METHODS Two-phase case-control study on a single plasma sample per case. The first phase was used to optimize the trisomy 13 algorithm, which was then applied to a second dataset to determine the risk score for trisomy 13 by laboratory personnel who were blinded to the fetal karyotype. RESULTS In the first phase, trisomy 13 risk scores were given for 11 cases of trisomy 13 and 145 euploid cases at 11-13 weeks' gestation. The test identified seven (63.6%) cases of trisomy 13 with no false positives. The trisomy 13 algorithm was subsequently modified and the trisomy 13 risk score was > 99% in all 11 cases of trisomy 13 and < 0.01% in all 145 euploid cases. In the second phase, the new algorithm was used to generate trisomy 13 risk scores for 10 cases of trisomy 13 and 1939 euploid cases. The trisomy 13 risk scores were > 99% in eight (80.0% (95% confidence interval (CI), 49.0-94.3%)) cases of trisomy 13. In the 1939 euploid cases the risk score for trisomy 13 was < 0.01% in 1937 (99.9%), 0.79% in one, and > 99% in one. Therefore, at the predefined risk cut-off of 1% for classifying a sample as high or low risk, the false-positive rate (FPR) was 0.05% (95% CI, 0.0-0.3%). CONCLUSIONS Chromosome-selective sequencing of cfDNA can detect the majority of cases of trisomy 13 at an FPR of less than 0.1%.
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114
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Zhao X, Song K, Wang S, Zu Y, Li N, Yu X. Micronization of the Pharmaceutically Active Agent Genipin by an Antisolvent Precipitation Process. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201200036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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115
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Ma S, Richardson J, Bitmansour A, Solberg T, Pidikiti R, Song K, Stojadinovic S, Vitetta E, Meyer J. Depletion of Regulatory T Cells Does Not Influence the Inflammatory Response Induced by High-dose Irradiation. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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116
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Hatzivassiliou G, Haling J, Chen H, Song K, Peck A, Hoeflich K, Friedman L, Malek S, Belvin M. 378 Differential Targeting of KRAS and BRAF Mutant Tumors Using MEK Inhibitors with Distinct Mechanisms of Action. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72176-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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117
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Song Y, Shin T, Jo I, Jeong Y, Kang M, Sim M, Song K. 54 Predicting Factors Associated With Clinical Deterioration of Sepsis Patients With Intermediate Levels of Serum Lactate. Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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118
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Lu L, Zhou D, Jiang X, Song K, Li K, Ding W. Loss of E-cadherin in multidrug resistant breast cancer cell line MCF-7/Adr: possible implication in the enhanced invasive ability. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2012; 16:1271-1279. [PMID: 23047512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Recently, many observations have drawn researchers' attention to study drug resistance and invasion/metastasis as a single entity. However, little evidence is available about the relationship between the multiple drug resistance (MDR) and invasion so far. AIM To study the relationship between the multiple drug resistance and invasive-metastatic phenotypes in cancer cells. MATERIALS AND METHODS In this study, we compared the biological alterations of drug-resistant cells with their parental control and demonstrated that the drug-resistant cells have acquired enhanced invasive ability in addition to their acquired MDR phenotype. RESULTS Motility and invasiveness assays revealed that MCF-7 / Adr had an invasive phenotype. Light and electron microscopy showed loss of cell-cell clustering after trypsinization, loss of tight junctions and desmosomes, ultrastructural changes to the actin network and nucleus, loss of epithelial characters, and increase in filopodia in the drug resistant cell line. A major component of cell-cell junctions, E-cadherin, was shown to be expressed on the protein and RNA levels in MCF-7 but not MDF-7 / Adr cells. More protrusions (pseudopodia) on the cell surface were found in MCF-7 / Adr cells, which enable the cells to migrate and invade / metastasize. Examination of ultrastructural morphology revealed that great changes occurred in drug resistant cancer cells including absence of tight junctions/desmosomes, and dislocation of cytoskeleton microfilaments. Since the cadherin / catenin complexes are further associated with the major cytoskeleton components at cell-cell junctions, we measured E-cadherin expression in drug-resistant cells. Both Western blot and immunocytochemical staining demonstrated the loss of E-cadherin expression in MCF-7 / Adr cells. Further, RNA in situ hybridization results confirmed that loss of E-cadherin expression occurred at the transcriptional level. CONCLUSIONS The drug-resistant MCF-7/Adr cells were found to be more invasive/metastatic than their parental control, possibly related to the loss of E-cadherin expression.
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119
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Pidikiti R, Stojadinovic S, Song K, Speiser M, Solberg T. SU-E-T-274: Monte Carlo Simulations of Output Factors for a Small Animal Irradiator. Med Phys 2012; 39:3766. [DOI: 10.1118/1.4735342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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120
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Kim M, Park J, Song K, Kim HG, Koh JS, Boo YC. Screening of plant extracts for human tyrosinase inhibiting effects. Int J Cosmet Sci 2012; 34:202-8. [PMID: 22220689 DOI: 10.1111/j.1468-2494.2012.00704.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Screening for tyrosinase (TYR) inhibitors potentially useful for control of skin pigmentation has been hampered by the limited availability of human TYR. To overcome this hurdle, we have established human embryonic kidney (HEK293)-TYR cells that constitutively express human TYR. In the current study, we assayed human TYR inhibition activities of 50 plant extracts using the lysates of transformed HEK293-TYR cells. The strongest inhibition of human TYR was shown by the extract of Vaccinium bracteatum Thunberg, followed by the extract of Morus bombycis Koidzumi. The former extract did not inhibit mushroom TYR activity whereas significant inhibition was observed with the latter extract, demonstrating the importance of using human TYR in the screening for human TYR inhibitors. Upon liquid-liquid partitioning of the extract from V. bracteatum, the active constituents were enriched in the ethyl acetate fraction, and the subsequent preparatory thin-layer chromatography identified p-coumaric acid (PCA) as the main active constituent. The hypo-pigmentation of PCA was verified in the MelanoDerm™ Skin Model. This study demonstrates that transformed HEK293-TYR cells could expedite the discovery of human TYR-specific inhibitors from natural sources which might be useful in the control of skin pigmentation.
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121
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Cha W, Cho HR, Jung EC, Park KK, Kim WH, Song K. Spectroscopic studies on U(VI)-salicylate complex formation with multiple equilibria. RADIOCHIM ACTA 2011. [DOI: 10.1524/ract.2012.1930] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
This study investigates multiple equilibria related to the formation of the U(VI)-salicylate complex in a pH range of 3.0–5.5 using UV-Vis absorption and fluorescence measurement techniques. The absorbance changes at the characteristic charge-transfer bands of the complex were monitored, and the results indicated the presence of multiple equilibria and the formation of both 1:1 and 1:2 (U(VI):salicylate) complexes possessing bi-dentate chelate structures. The determined step-wise formation constants (log K
1:1 and log K
1:2) are as follows: 12.5 ± 0.1 and 11.4 ± 0.2 for salicylate, 11.2 ± 0.1 and 10.1 ± 0.2 for 5-sulfosalicylate, and 12.4 ± 0.1 and 11.4 ± 0.1 for 2,6-dihydroxybenzoate, respectively. The molar absorptivities of the complexes are also provided. Furthermore, time-resolved laser-induced luminescence spectra of U(VI) species demonstrate the presence of both a dynamic and static quenching process upon the addition of a salicylate ligand. Particularly for the luminescent hydroxouranyl species, a strong static quenching effect is observed. The results suggest that both the UO2(HSal)+ and the U(VI)–Sal chelate complexes serve as ground-state complexes that induce static quenching. The Stern–Volmer parameters were derived based on the measured luminescent intensity and lifetime data. The static quenching constants (log K
S) obtained are 3.3 ± 0.1, 4.9 ± 0.1, and 4.4 ± 0.1 for UO2
2+, (UO2)2(OH)2
2+ and (UO2)3(OH)5
+, respectively.
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Park Y, Bae S, Cho Y, Kim J, Song K. UV–vis absorption spectroscopic study for on-line monitoring of uranium concentration in LiCl–KCl eutectic salt. Microchem J 2011. [DOI: 10.1016/j.microc.2011.04.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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123
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Lee W, Song K, Lim K, Lee S, Lee B, Jang G. Influence of factors during superovulation on embryo production in Korean Holstein cattle. J Vet Med Sci 2011; 74:167-74. [PMID: 21959893 DOI: 10.1292/jvms.11-0057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to investigate the influence of key parameters (donor parity, milk production, post-parturient day, season and milk recording data) associated with efficiency of embryo recovery (ER) in Holstein cattle. Elite Holstein cows and heifers were selected for ER, while Holstein heifers were used as recipients. The numbers of transferable embryos (TEs) produced were not significantly different when analyzed in terms of donor parity, milk production, postparturient day and season. However, the numbers of TEs were significantly increased when the milk protein (%; P)/fat (%; F) ratio was over 0.95 and/or the milk urea nitrogen (MUN) was between 12 and 18 dl/ml. The results from ET showed no differences in pregnancy rates among Holstein heifers receiving other types, developmental stage codes and quality grades of embryos. The mean interval from ER to artificial insemination was 60.6 days. Moreover, 19 offspring that had milk recording data showed a similar milk yield performance to that of the donor cows. In conclusion, this study showed that in Holstein cows, embryos were recovered and transferred and resulted in production of viable calves. Furthermore, P/F ratio and MUN could be candidate indicators for selection of high-efficiency donor cows.
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Sul C, Song K, Na Y, Lim J, Shin J, Hwang E, Oh T. UP-02.097 Induction of Apoptosis and Enhancement of Chemosensitivity by Downregulating of Apurinic/Apyrimidinic Endonuclease 1/Redox Factor-1 in Castration-resistant Prostate Cancer Cells. Urology 2011. [DOI: 10.1016/j.urology.2011.07.915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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125
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Sul C, Na Y, Song K, Lim J, Shin J, Oh T, Hwang E. UP-02.174 The Effects of Neoadjuvant Hormonal Therapy on Vascular Endothelial Growth Factor and Microvessel Density in Prostate Cancer. Urology 2011. [DOI: 10.1016/j.urology.2011.07.992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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