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Dao-Yi Miao, Ling-Zhou Zhang, Hui-Hui Li, Guo-Jing Yang
OBJECTIVE: To explore the similarity between the iliac crest and the metacarpal bone, so as to provide an anatomical basis for the reconstruction of the metacarpal bone of the hand with the iliac crest grafting. METHODS: There are 16 upper limb specimens and 10 pelvic specimens. The morphological features of the second, third, fourth and 5th metacarpal bones and iliac crest were observed. The following indexes were measured: arc height and length of metacarpal head articular surface, volar-dorsal metacarpal diameter, ulnoradial diamater, arc height and length of iliac crest, and inner and outer diameter...
November 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Khanh Dao Duc, Zain H Saleem, Yun S Song
The Totally Asymmetric Exclusion Process (TASEP) is a classical stochastic model for describing the transport of interacting particles, such as ribosomes moving along the messenger ribonucleic acid (mRNA) during translation. Although this model has been widely studied in the past, the extent of collision between particles and the average distance between a particle to its nearest neighbor have not been quantified explicitly. We provide here a theoretical analysis of such quantities via the distribution of isolated particles...
January 2018: Physical Review. E
Dong An, Chandrakumar Balaratnasingam, Morgan Heisler, Ashley Francke, MyeongJin Ju, Ian L McAllister, Marinko Sarunic, Dao-Yi Yu
The aim was to quantitatively compare retinal vascular detail as seen on optical coherence tomography angiography (OCTA) and matched histology in the human eye. 13 normal human donor eyes were used. The central retinal artery was cannulated after which human packed red blood cells were perfused through the retinal vasculature. Retinal vessels were imaged using a custom-built OCTA device during red blood cell perfusion. The eye was subsequently perfused with endothelial cell antibodies and the flat-mounted retina studied histologically using a confocal scanning laser microscope...
February 12, 2018: Experimental Eye Research
Do Thi Ha, Phung Thanh Long, Tran Thi Hien, Dao Trong Tuan, Nguyen Thi Thuy An, Nguyen Minh Khoi, Ha Van Oanh, Tran Manh Hung
BACKGROUND: Vitis heyneana is widely distributed in the north of Vietnam, it has been used in Vietnamese traditional medicine as an agent for treatment of arthritis, bronchitis, carbuncles and inflammatory conditions, and menstrual irregularities. However, this plant has not been investigated in phytochemical constituents and biological effects, especially in the anti-inflammatory property. RESULTS: Bioassay-guided fractionation of the EtOAc soluble fraction from the aerial part of Vitis heyneana resulted in the isolation of a series of oligostilbenoids as piceid (1), 2-r-viniferin (2), betulifol A (3), vitisinol C (4), (-)-trans-ε-viniferin (5), α-viniferin (6), shoreaketon (7), amurensin B (8), vitisinol B (9), and cis-vitisin B (10)...
February 13, 2018: Chemistry Central Journal
Xiao-Yang Zhu, Bin Tu, Guo-Jun Hu, Qiao-Jun Fang, Jun-Jie Qi, Xun-Wen Xiao, Yan-Fang Geng, Qing-Dao Zeng
Tetrathiafulvalenes (TTFs) are a class of important functional materials whose intermolecular interaction, which will contribute to constructing a supramolecular structure, still needs further understanding. In this study, the self-assembly behavior and structure of a series of TTFs bearing different alkyl chains and substituents were investigated by scanning tunneling microscopy (STM) in combination with density functional theory (DFT) calculations. Contrary to previous reports, herein, a series of benzoic acid-functionalized TTFs (CnTTFCOOH) and pyridine-functionalized TTFs (CnTTFN) with different lengths of alkyl chains have been substituted on the sulfur atom, where n is equal to 8, 10, 14, or 16...
February 14, 2018: Physical Chemistry Chemical Physics: PCCP
Guan-Bao Li, Chao Zhang, Chun Song, Yu-Dao Ma
The introduction of trifluoromethyl groups into organic molecules has attracted great attention in the past five years. In this review, we describe the recent efforts in the development of trifluoromethylation via copper catalysis using nucleophilic, electrophilic or radical trifluoromethylation reagents.
2018: Beilstein Journal of Organic Chemistry
Zhen-Yu Qi, Kai-Xin Wang, Meng-Yu Yan, Mukesh Kumar Kanwar, Dao-Yi Li, Leonard Wijaya, Mohammed Nasser Alyemeni, Parvaiz Ahmad, Jie Zhou
Melatonin is a pleiotropic signal molecule that plays critical roles in regulating plant growth and development, as well as providing physiological protections against various environmental stresses. Nonetheless, the mechanisms for melatonin-mediated pollen thermotolerance remain largely unknown. In this study, we report that irrigation treatment with melatonin (20 µM) effectively ameliorated high temperature-induced inactivation of pollen and inhibition of pollen germination in tomato ( Solanum lycopersicum ) plants...
February 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Chao Lu, Tao Jiang, Shengguang Liu, Rui Wang, Lingrong Zhao, Pengfei Zhu, Dao Xiang, Jie Zhang
Coulomb interaction between charged particles is a well-known phenomenon in many areas of research. In general, the Coulomb repulsion force broadens the pulse width of an electron bunch and limits the temporal resolution of many scientific facilities such as ultrafast electron diffraction and x-ray free-electron lasers. Here we demonstrate a scheme that actually makes use of the Coulomb force to compress a relativistic electron beam. Furthermore, we show that the Coulomb-driven bunch compression process does not introduce additional timing jitter, which is in sharp contrast to the conventional radio-frequency buncher technique...
January 26, 2018: Physical Review Letters
Ling Zhou, Kun Miao, Bingjiao Yin, Huaping Li, Jiahui Fan, Yazhen Zhu, Hongping Ba, Zunyue Zhang, Fang Chen, Jing Wang, Chunxia Zhao, Zhuoya Li, Dao Wen Wang
Background -Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of cells that expand in cancer, inflammation, and infection and negatively regulate inflammation and the immune response. Heart failure (HF) is a complex clinical syndrome, wherein inflammation induction and incomplete resolution can potentially contribute to HF development and progression. However, the role of MDSCs in HF remains unclear. Methods -The percentage of MDSCs in HF patients and in mice with pressure overload-induced HF using isoproterenol (ISO) infusion or transverse aortic constriction (TAC), was detected by flow cytometry...
February 1, 2018: Circulation
Li-Min Mao, Nan He, Dao-Zhong Jin, John Q Wang
The acetylcholine muscarinic 4 (M4) receptor is a principal muscarinic receptor subtype present in the striatum. Notably, Gαi/o-coupled M4 receptors and Gαs/Golf-coupled dopamine D1 receptors are coexpressed in striatonigral projection neurons and are thought to interact with each other to regulate neuronal excitability, although underlying molecular mechanisms are poorly understood. In this study, we investigated the role of M4 receptors in the regulation of phosphorylation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors in the rat normal and dopamine-stimulated striatum in vivo...
February 9, 2018: Neuroscience
Salim Ansari, Nicole Troelenberg, Van Anh Dao, Tobias Richter, Gregor Bucher, Martin Klingler
The distinction of anterior versus posterior is a crucial first step in animal embryogenesis. In the fly Drosophila, this axis is established by morphogenetic gradients contributed by the mother that regulate zygotic target genes. This principle has been considered to hold true for insects in general but is fundamentally different from vertebrates, where zygotic genes and Wnt signaling are required. We investigated symmetry breaking in the beetle Tribolium castaneum, which among insects represents the more ancestral short-germ embryogenesis...
February 5, 2018: Proceedings of the National Academy of Sciences of the United States of America
Yan-Feng Song, Dao-Zhou Liu, Ying Cheng, Zeng-Hui Teng, Han Cui, Miao Liu, Bang-Le Zhang, Qi-Bing Mei, Si-Yuan Zhou
The experiment aims to increase anti-tumor activity while decreasing the systemic toxicity of doxorubicin (DOX). A charge reversible and mitochondria/nucleus dual target lipid hybrid nanoparticles (LNPs) was prepared. The in vitro experimental results indicated that LNPs released more amount of DOX in acidic environment and delivered more amount of DOX to the mitochondria and nucleus of tumor cells than free DOX did, which resulted in the reduction of mitochondrial membrane potential and the enhancement of cytotoxicity of LNPs on tumor cells...
February 12, 2018: Molecular Pharmaceutics
Chi Zhou, Jin Huang, Qing Li, Chenao Zhan, Xizhen Xu, Xu Zhang, Ding Ai, Yi Zhu, Zheng Wen, Dao Wen Wang
Chronic excessive drinking leads to myocardial contractile dysfunction and dilated cardiomyopathy, where ethanol toxicity plays an essential role. Cytochrome P450 (CYP) epoxygenases metabolize arachidonic acids to form epoxyeicosatrienoic acids (EETs), which exert beneficial roles in the cardiovascular system, but their role in alcoholic cardiomyopathy is elusive. This study was designed to evaluate the effects and mechanisms of CYP2J2 gene delivery on ethanol-induced myocardial dysfunction with focus on autophagy and apoptosis...
February 7, 2018: Free Radical Biology & Medicine
Heng-Dao Lin, Li-Sung Hsu, Chih-Ching Chien, Ssu-Ching Chen
Ametrym (AMT) is the most widely used herbicide and frequently detected in the aquatic environment. AMT also represent a potential health risk to aquatic organisms and animals, including humans. However, little data are available on their toxicity to zebrafish (Danio rerio). The aim of the present study was to evaluate the toxicological effects of AMT exposure on zebrafish embryos. In the acute toxicity test, 6 hpf embryos were exposed to various concentrations of AMT for 24 or 48 h. The results indicated that AMT induced malformation in larvae...
February 10, 2018: Environmental Toxicology
Lakmini Kumari Senavirathna, Chaoqun Huang, Xiaoyun Yang, Maria Cristina Munteanu, Roshini Sathiaseelan, Dao Xu, Craig A Henke, Lin Liu
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive and typically fatal lung disease with a very low survival rate. Excess accumulation of fibroblasts, myofibroblasts and extracellular matrix creates hypoxic conditions within the lungs, causing asphyxiation. Hypoxia is, therefore, one of the prominent features of IPF. However, there have been few studies concerning the effects of hypoxia on pulmonary fibroblasts. In this study, we investigated the molecular mechanisms of hypoxia-induced lung fibroblast proliferation...
February 9, 2018: Scientific Reports
Lucette Flandroy, Theofilos Poutahidis, Gabriele Berg, Gerard Clarke, Maria-Carlota Dao, Ellen Decaestecker, Eeva Furman, Tari Haahtela, Sébastien Massart, Hubert Plovier, Yolanda Sanz, Graham Rook
Plants, animals and humans, are colonized by microorganisms (microbiota) and transiently exposed to countless others. The microbiota affects the development and function of essentially all organ systems, and contributes to adaptation and evolution, while protecting against pathogenic microorganisms and toxins. Genetics and lifestyle factors, including diet, antibiotics and other drugs, and exposure to the natural environment, affect the composition of the microbiota, which influences host health through modulation of interrelated physiological systems...
February 3, 2018: Science of the Total Environment
Friederike Langhauser, Ana I Casas, Vu-Thao-Vi Dao, Emre Guney, Jörg Menche, Eva Geuss, Pamela W M Kleikers, Manuela G López, Albert-L Barabási, Christoph Kleinschnitz, Harald H H W Schmidt
Network medicine utilizes common genetic origins, markers and co-morbidities to uncover mechanistic links between diseases. These links can be summarized in the diseasome, a comprehensive network of disease-disease relationships and clusters. The diseasome has been influential during the past decade, although most of its links are not followed up experimentally. Here, we investigate a high prevalence unmet medical need cluster of disease phenotypes linked to cyclic GMP. Hitherto, the central cGMP-forming enzyme, soluble guanylate cyclase (sGC), has been targeted pharmacologically exclusively for smooth muscle modulation in cardiology and pulmonology...
2018: NPJ Systems Biology and Applications
Jingjing Fan, Lin Qiu, Hongyang Shu, Ben Ma, Marco Hagenmueller, Johannes H Riffel, Soeren Meryer, Min Zhang, Stefan E Hardt, Lin Wang, Dao Wen Wang, Hongyu Qiu, Ning Zhou
Postinfarct cardiac hypertrophy is an independent risk factor for heart failure and sudden death. Regression of cardiac hypertrophy has emerged as a promising strategy in the treatment of myocardial infarction (MI). Here we hypothesized that frizzled1 (FZD1), a receptor of the canonical Wnt signaling pathway, is a novel mediator of ischemia-associated cardiac hypertrophy. MI was induced in mice by left anterior descending (LAD) coronary occlusion. One week after MI, the expression of FZD1 was found to be notably increased in the left ventricles (LVs) of the MI-mice compared to shams...
January 9, 2018: Oncotarget
Xue-Dao He, Yan-Mei Guo, Raj K Goyal
Background: Hyperglycemia has been reported to enhance vagovagal reflex that causes the release of inhibitory neurotransmitter, nitric oxide (NO), at the neuromuscular junction in the antrum to relax the antrum and slow gastric emptying by stimulating glucose-sensitive afferent neurons. However, hyperglycemia has also been reported to cause fast gastric emptying that may be due to suppression of the inhibitory motor neurons. Aims: The purpose of the present study was to investigate changes in inhibitory neuromuscular transmission in the gastric antrum due to hyperglycemia...
2018: Frontiers in Medicine
Li Hongxin, Guo Wenbin, Hai-Zhou Zhang, Fei Liang, Gui-Dao Yuan, Zeeshan Farhaj, Jun Zhang
BACKGROUND: The current approaches of transcatheter closure of mitral paravalvular leak (MPVL) have different drawbacks. The challenges come from transseptal puncture, accessing the MPVL site, and the absence of dedicated delivery systems. This study introduces a novel peratrial approach for device closure of different locations of MPVLs using a probe-assisted delivery system under three-dimensional transesophageal echocardiography. METHODS: A 4.0 cm minithoracotomy incision was made in the fourth right interspaces...
February 2, 2018: Annals of Thoracic Surgery
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