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https://www.readbyqxmd.com/read/29145260/reversible-severe-fatty-liver-induced-by-capecitabine-a-case-report
#1
Yiyan Jiang, Qiancheng He, Suxia Li, Chang Shi, Xiaolei Yang
RATIONALE: Capecitabine (CAP) is a chemotherapeutic agent used to treat breast and gastrointestinal cancers. The most common adverse reactions of CAP primarily included gastrointestinal and dermatological effects. Whereas, the CAP-induced fatty liver had never been reported. PATIENT CONCERNS: In this study, a-69-year old female presented a history of hypertension with regulated blood pressure, whereas diabetes mellitus, hyperlipidemia, and hepatitis were excluded...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29099134/assessing-numerical-methods-for-molecular-and-particle-simulation
#2
Xiaocheng Shang, Martin Kröger, Benedict Leimkuhler
We discuss the design of state-of-the-art numerical methods for molecular dynamics, focusing on the demands of soft matter simulation, where the purposes include sampling and dynamics calculations both in and out of equilibrium. We discuss the characteristics of different algorithms, including their essential conservation properties, the convergence of averages, and the accuracy of numerical discretizations. Formulations of the equations of motion which are suited to both equilibrium and nonequilibrium simulation include Langevin dynamics, dissipative particle dynamics (DPD), and the more recently proposed "pairwise adaptive Langevin" (PAdL) method, which, like DPD but unlike Langevin dynamics, conserves momentum and better matches the relaxation rate of orientational degrees of freedom...
November 3, 2017: Soft Matter
https://www.readbyqxmd.com/read/29080938/description-of-deinococcus-populi-sp-nov-from-the-trunk-surface-of-a-japanese-aspen-tree
#3
Juan Li, Chisaki Kudo, Akio Tonouchi
A bacterial strain designated PtRA-8(T) was isolated from the trunk surface of a Japanese aspen tree (Populus tremula var. sieboldii). Cells of strain PtRA-8(T) were aerobic, non-motile, non-spore forming, Gram-stain-negative rods, 1.0‒2.0 µm in width and 3.0‒10.0 µm in length. The pH range for growth was between 5.5 and 7.5, with an optimum at 6.5. The temperature range for growth was between 10 and 37 °C, with an optimum at around 25‒30 °C. Strain PtRA-8(T) was highly resistant to UV irradiation, similar to its Deinococcus relatives...
October 28, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/29065426/dihydropyrimidine-dehydrogenase-pharmacogenetics-for-predicting-fluoropyrimidine-related-toxicity-in-the-randomised-phase-iii-adjuvant-tosca-trial-in-high-risk-colon-cancer-patients
#4
RANDOMIZED CONTROLLED TRIAL
A Ruzzo, F Graziano, Fabio Galli, Francesca Galli, E Rulli, S Lonardi, M Ronzoni, B Massidda, V Zagonel, N Pella, C Mucciarini, R Labianca, M T Ionta, I Bagaloni, E Veltri, P Sozzi, S Barni, V Ricci, L Foltran, M Nicolini, E Biondi, A Bramati, D Turci, S Lazzarelli, C Verusio, F Bergamo, A Sobrero, L Frontini, M Menghi, M Magnani
BACKGROUND: Dihydropyrimidine dehydrogenase (DPD) catabolises ∼85% of the administered dose of fluoropyrimidines. Functional DPYD gene variants cause reduced/abrogated DPD activity. DPYD variants analysis may help for defining individual patients' risk of fluoropyrimidine-related severe toxicity. METHODS: The TOSCA Italian randomised trial enrolled colon cancer patients for 3 or 6 months of either FOLFOX-4 or XELOX adjuvant chemotherapy. In an ancillary pharmacogenetic study, 10 DPYD variants (*2A rs3918290 G>A, *13 rs55886062 T>G, rs67376798 A>T, *4 rs1801158 G>A, *5 rs1801159 A>G, *6 rs1801160 G>A, *9A rs1801265 T>C, rs2297595 A>G, rs17376848 T>C, and rs75017182 C>G), were retrospectively tested for associations with ⩾grade 3 fluoropyrimidine-related adverse events (FAEs)...
October 24, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29045513/dpyd-genotype-guided-dose-individualization-to-improve-patient-safety-of-fluoropyrimidine-therapy-call-for-a-drug-label-update
#5
L M Henricks, F L Opdam, J H Beijnen, A Cats, J H M Schellens
The fluoropyrimidine anticancer drugs, especially 5-fluorouracil (5-FU) and capecitabine, are frequently prescribed for several types of cancer, including breast, colorectal, head and neck and gastric cancer. In the current drug labels of 5-FU and capecitabine in the European Union and the United States of America no adaptive dosing strategies are incorporated for polymorphic metabolism of 5-FU.Although treatment with fluoropyrimidines is generally well tolerated, a major clinical limitation is that a proportion of the treated population experiences severe, sometimes life-threatening, fluoropyrimidine-related toxicity...
August 2, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29032674/doxorubicin-loaded-unimolecular-micelle-stabilized-gold-nanoparticles-as-a-theranostic-nanoplatform-for-tumor-targeted-chemotherapy-and-computed-tomography-imaging
#6
Wenjing Lin, Xiaofang Zhang, Long Qian, Na Yao, Ya Pan, Lijuan Zhang
Current research is mainly trending toward addressing the development of multifunctional nanocarriers that could precisely reach disease sites, release drugs in a controlled-manner, and act as an imaging agent for both diagnosis and targeted therapy. In this study, a pH-sensitive theranostic nanoplatform as a promising dual-functional nanovector for tumor therapy and computed tomography (CT) imaging was developed. The 21-arm star-like triblock polymer of β-cyclodextrin-{poly(ε-caprolactone)-poly(2-aminoethyl methacrylate)-poly[poly(ethylene glycol) methyl ether methacrylate]}21 [β-CD-(PCL-PAEMA-PPEGMA)21] with stable unimolecular micelles formed in aqueous solution was first synthesized by combined ROP with ARGET ATRP techniques and then was used as a template for fabricating gold nanoparticles (AuNPs) with uniform sizes and excellent colloidal stability in situ followed by the encapsulation of doxorubicin (DOX) with maximum entrapment efficiency up to 60% to generate the final product β-CD-(PCL-PAEMA-PPEGMA)21/AuNPs/DOX...
October 26, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28985085/effect-of-architecture-on-micelle-formation-and-liquid-crystalline-ordering-in-solutions-of-block-copolymers-comprising-flexible-and-rigid-blocks-rod-coil-vs-y-shaped-vs-comblike-copolymers
#7
Kirill E Polovnikov, Igor I Potemkin
Micelle formation of amphiphilic block copolymers of various architectures comprising both flexible and rodlike blocks were studied in a selective solvent via dissipative particle dynamics (DPD) simulations. Peculiarities of self-assembly of Y-shaped (insoluble rigid block and two flexible soluble arms) and comblike (soluble flexible backbone with insoluble rigid side chains) copolymers are compared with those of equivalent rod-coil diblock copolymers. We have shown that aggregation of the rigid blocks into the dense core of the micelles is accompanied by their nematic ordering...
October 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28984812/factors-associated-with-diffusely-increased-renal-uptake-of-tc-99m-diphosphono-propanedicarboxylic-acid-on-bone-scintigraphy-in-patients-with-end-stage-renal-disease
#8
Keunyoung Kim, Seong-Jang Kim, Sang H Song, In-Joo Kim, Kyoungjune Pak, So J Kim, Senghyeon Shin, Bum S Kim
OBJECTIVE: We aimed to determine the factors contributing toward diffusely increased renal uptake on bone scintigraphy using technetium-99m (Tc-99m) diphosphono-propanedicarboxylic acid (DPD) in patients with end-stage renal disease. PATIENTS AND METHODS: One-hundred and forty-three bone scintigraphies, performed between June 2007 and July 2013, in 135 patients with chronic kidney disease were analyzed retrospectively, including 22 bone scintigraphies (15 patients; eight women; seven men) with glomerular filtration rates less than 15 ml/min/1...
December 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28967930/dynamic-evolution-of-a-vesicle-formed-by-comb-like-block-copolymer-tethered-nanoparticles-a-dissipative-particle-dynamics-simulation-study
#9
Ying-Tao Liu, Yan-Rong Li, Xin Wang
Vesicles are well-sealed capsules that can store or transport substances. Their dynamic evolution mechanisms are important to fulfill specific functions. In the present study, dissipative particle dynamics (DPD) simulation was employed to study the formation, fusion, and fission pathways of vesicles. Our results show that comb-like block copolymer-tethered nanoparticles can self-assemble into stable vesicles, which may be a good candidate for drug entrapment and controlled release of drug. The spontaneous fusion of this type of vesicles has been studied, whose mechanism is different from that of the vesicles formed from comb-like block copolymers...
October 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28964628/structural-connectome-alterations-in-prodromal-and-de-novo-parkinson-s-disease-patients
#10
Ming-Ching Wen, Hannah S E Heng, Jung-Lung Hsu, Zheyu Xu, Gerald M Liew, Wing Lok Au, Ling Ling Chan, Louis C S Tan, Eng King Tan
BACKGROUND: Although the clinical signs of prodromal Parkinson's disease (PD) have been identified, little is known about the neural features of the prodromal phase of PD (proPD). The aim of this study was to examine the structural network alterations from healthy aging to proPD and to early PD. METHODS: 181 non-demented and non-depressed participants comprising 55 healthy controls (HCs), 20 proPDs, and 106 de novo PD patients (dPDs) were included in the study and underwent clinical assessment and diffusion tensor imaging scanning...
September 21, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28949805/ivermectin-dissipation-and-movement-from-feces-to-soil-under-field-conditions
#11
Lucía Emilia Iglesias, Carlos Saumell, Federica Sagüés, Juan Manuel Sallovitz, Adrián Luis Lifschitz
The aim of this work was to evaluate the fate of ivermectin (IVM) at two concentrations in cattle feces and its movement to the nearby soil and plants. Feces were spiked with IVM at two levels: 3000 ng g(-1) (high group, HG) and 300 ng g(-1) (low group, LG). Artificial dung pats were prepared and deposited in an experimental field area. Feces and underlying soil were sampled up to 60 days post-deposition (dpd). As an additional analysis, grasses growing around the pats were sampled at 30 and 60 dpd. Ivermectin concentrations in all matrices were determined by HPLC...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28938807/adaptive-resolution-simulations-coupling-atomistic-water-to-dissipative-particle-dynamics
#12
Julija Zavadlav, Matej Praprotnik
Multiscale methods are the most efficient way to address the interlinked spatiotemporal scales encountered in soft matter and molecular liquids. In the literature reported hybrid approaches span from quantum to atomistic, coarse-grained, and continuum length scales. In this article, we present the hybrid coupling of the molecular dynamics (MD) and dissipative particle dynamics (DPD) methods, bridging the micro- and mesoscopic descriptions. The interfacing is performed within the adaptive resolution scheme (AdResS), which is a linear momentum conserving coupling technique...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28930357/nanoparticle-encapsulation-in-vesicles-formed-by-amphiphilic-diblock-copolymers
#13
Junying Yang, Yi Hu, Rong Wang, Daiqian Xie
We investigated the co-assembly of nanoparticles P and amphiphilic diblock copolymers AB in selective solvents using a dissipative particle dynamics (DPD) method. By controlling the nanoparticle concentration and the interaction parameter between the hydrophobic blocks and the solvents, we found that the aggregation morphology can be changed from rod-like micelles to disk-like micelles and further to vesicles. The ratio of the hydrophobic/hydrophilic block and the nanoparticle concentration largely affects the structural characteristics of vesicles and the dispersion of nanoparticles...
November 8, 2017: Soft Matter
https://www.readbyqxmd.com/read/28929491/capecitabine-based-treatment-of-a-patient-with-a-novel-dpyd-genotype-and-complete-dihydropyrimidine-dehydrogenase-deficiency
#14
Linda M Henricks, Ester J Siemerink, Hilde Rosing, Judith Meijer, Susan M Goorden, Abeltje M Polstra, Lida Zoetekouw, Annemieke Cats, Jan H Schellens, André B van Kuilenburg
Fluoropyrimidines are frequently used anti-cancer drugs. It is known that patients with reduced activity of dihydropyrimidine dehydrogenase (DPD), the key metabolic enzyme in fluoropyrimidine inactivation, are at increased risk of developing severe fluoropyrimidine-related toxicity. Upfront screening for DPD deficiency and dose reduction in patients with partial DPD deficiency is recommended and improves patient safety. For patients with complete DPD deficiency, fluoropyrimidine-treatment has generally been discouraged...
September 20, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28927087/gimeracil-enhances-the-antitumor-effect-of-cisplatin-in-oral-squamous-cell-carcinoma-cells-in-vitro-and-in-vivo
#15
Koji Harada, Tarannum Ferdous, Toyoko Harada, Takanori Takenawa, Yoshiya Ueyama
Gimeracil or 5-chloro-2,4-dihydroxypyridine (CDHP) enhances the antitumor effects of 5-fluorouracil (5-FU) by inhibiting dihydropyrimidine dehydrogenase (DPD), which is involved in the degradation of 5-FU. CDHP, as part of a combination therapy, was also reported to exert a radiosensitizing effect. Therefore, CDHP may have underlying mechanisms of action other than DPD inhibition. The focus of the present study was to investigate the antitumor effects of CDHP and cisplatin (CDDP) combination treatment in vitro and in vivo against oral squamous cell carcinoma (OSCC) tumors...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927083/expression-of-thymidylate-synthase-predicts-clinical-outcomes-of-s-1-based-chemotherapy-in-squamous-cell-lung-cancer
#16
Yuichiro Honma, Shinsaku Togo, Kazue Shimizu, Miniwan Tulafu, Takuo Hayashi, Toshimasa Uekusa, Shigeru Tominaga, Kenji Kido, Yuichi Fujimoto, Yukiko Nanba, Kazuya Takamochi, Shiaki Oh, Kenji Suzuki, Kazuhisa Takahashi
Non-small cell lung cancer (NSCLC) patients with squamous cell carcinoma (SCC) histology have limited chemotherapeutic options. Treatment with S-1 combined with carboplatin (CBDCA) has been shown to provide a significant survival benefit in SCC patients compared with treatment with combined CBDCA and paclitaxel. The aim of the present study was to investigate the association between the expression of molecular markers related to the pharmacological action of S-1, including thymidylate synthase (TS), orotate phosphoribosyltransferase (OPRT) and dihydropyrimidine dehydrogenase (DPD), and the clinical efficacy of S-1-based chemotherapy in SCC patients...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28922399/probing-eukaryotic-cell-mechanics-via-mesoscopic-simulations
#17
Kirill Lykov, Yasaman Nematbakhsh, Menglin Shang, Chwee Teck Lim, Igor V Pivkin
Cell mechanics has proven to be important in many biological processes. Although there is a number of experimental techniques which allow us to study mechanical properties of cell, there is still a lack of understanding of the role each sub-cellular component plays during cell deformations. We present a new mesoscopic particle-based eukaryotic cell model which explicitly describes cell membrane, nucleus and cytoskeleton. We employ Dissipative Particle Dynamics (DPD) method that provides us with the unified framework for modeling of a cell and its interactions in the flow...
September 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28912262/diastolic-pressure-difference-to-classify-pulmonary-hypertension-in-the-assessment-of-heart-transplant-candidates
#18
Stephen P Wright, Yasbanoo Moayedi, Farid Foroutan, Suhail Agarwal, Geraldine Paradero, Ana C Alba, Jay Baumwol, Susanna Mak
BACKGROUND: The diastolic pressure difference (DPD) is recommended to differentiate between isolated postcapillary and combined pre-/postcapillary pulmonary hypertension (Cpc-PH) in left heart disease (PH-LHD). However, in usual practice, negative DPD values are commonly calculated, potentially related to the use of mean pulmonary artery wedge pressure (PAWP). We used the ECG to gate late-diastolic PAWP measurements. We examined the method's impact on calculated DPD, PH-LHD subclassification, hemodynamic profiles, and mortality...
September 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28904551/suppressive-effect-of-the-n-hexane-extract-of-litsea-japonica-fruit-flesh-on-monosodium-iodoacetate-induced-osteoarthritis-in-rats
#19
Seung-Hyung Kim, Hye-Jin Choi, Won-Kyung Yang, Ji-Eun Lee, Ju-Hyun Cho, In-Jae Park, Sunyoung Park, Bo-Kyung Park, Mirim Jin
We examined the antiosteoarthritic effect of the n-hexane extract of Litsea japonica fruit flesh (LJF-HE) in a rat model of monosodium-iodoacetate- (MIA-) induced osteoarthritis. LJF-HE significantly reduced the difference in weight-bearing capabilities of the hind paws between healthy and MIA-treated rats. Histological examination of the knee joints indicated that LJF-HE suppressed cartilage and bone destruction. Additionally, there were decreases in the expression of matrix metalloproteinase-2 and metalloproteinase-9 and cyclooxygenase-2 in the joints...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28886630/dissipative-particle-dynamics-systematic-parametrization-using-water-octanol-partition-coefficients
#20
Richard L Anderson, David J Bray, Andrea S Ferrante, Massimo G Noro, Ian P Stott, Patrick B Warren
We present a systematic, top-down, thermodynamic parametrization scheme for dissipative particle dynamics (DPD) using water-octanol partition coefficients, supplemented by water-octanol phase equilibria and pure liquid phase density data. We demonstrate the feasibility of computing the required partition coefficients in DPD using brute-force simulation, within an adaptive semi-automatic staged optimization scheme. We test the methodology by fitting to experimental partition coefficient data for twenty one small molecules in five classes comprising alcohols and poly-alcohols, amines, ethers and simple aromatics, and alkanes (i...
September 7, 2017: Journal of Chemical Physics
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