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https://www.readbyqxmd.com/read/28432918/a-quinoline-based-cu-2-ion-complex-fluorescence-probe-for-selective-detection-of-inorganic-phosphate-anion-in-aqueous-solution-and-its-application-to-living-cells
#1
Yanpeng Dai, Peng Wang, Jiaxin Fu, Kun Yao, Kuoxi Xu, Xiaobin Pang
A quinaldine functionalized probe QP has been designed and synthesized. It exhibited selective turn-off fluorescence response toward Cu(2+) ion over most of the biologically important ions at physiological pH. The binding ratio of the probe QP and Cu(2+) ion was determined to be 1:1 through fluorescence titration, Job's plot and ESI-MS. The binding constant (K) of Cu(2+) to probe QP was found to be 2.12×10(4)M(-1). Further, the Cu(2+) ensemble of probe QP was found to respond H2PO4(-) and HPO4(2-) among other important biological anions via fluorescence turn-on response at physiological pH...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28432501/high-scale-yield-of-nano-hydroxyapatite-through-combination-of-mechanical-activation-and-chemical-dispersion
#2
Xueling Gao, Chunchu Dai, Weiwei Liu, Yumei Liu, Ru Shen, Xiaotong Zheng, Ke Duan, Jie Weng, Shuxin Qu
The aim of this study is to develop a simple, convenient and effective approach to synthesize nano-sized hydroxyapatite (nano-HA) at high-scale yield. Nano-HA was wet synthesized in the presence or absence of alendronate sodium (ALN), one of bisphosphonates for anti-osteoporotic. Then aged and washed nano-HA precipitate was directly treated by mechanical activation combined with the chemical dispersion of ALN to prevent the agglomeration of nano-HA. ALN acted not only as a chemical dispersant but also as an orthopedic drug...
June 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28432360/functional-ectopic-neuritogenesis-by-retinal-rod-bipolar-cells-is-regulated-by-mir-125b-5p-during-retinal-remodeling-in-rcs-rats
#3
Yan Fu, Baoke Hou, Chuanhuang Weng, Weiping Liu, Jiaman Dai, Congjian Zhao, Zheng Qin Yin
Following retinal degeneration, retinal remodeling can cause neuronal microcircuits to undergo structural alterations, which particularly affect the dendrites of bipolar cells. However, the mechanisms and functional consequences of such changes remain unclear. Here, we used Royal College of Surgeon (RCS) rats as a model of retinal degeneration, to study structural changes in rod bipolar cells (RBCs) and the underlying mechanisms of these changes. We found that, with retinal degeneration, RBC dendrites extended into the outer nuclear layer (ONL) of the retina, and the ectopic dendrites formed synapses with the remaining photoreceptors...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432321/mycobacterium-tuberculosis-lineage-distribution-in-xinjiang-and-gansu-provinces-china
#4
Haixia Chen, Li He, Hairong Huang, Chengmin Shi, Xumin Ni, Guangming Dai, Liang Ma, Weimin Li
Mycobacterium tuberculosis (M. tuberculosis) genotyping has dramatically improved the understanding of the epidemiology of tuberculosis (TB). In this study, 187 M. tuberculosis isolates from Xinjiang Uygur Autonomous Region (Xinjiang) and Gansu province in China were genotyped using large sequence polymorphisms (LSPs) and variable number tandem repeats (VNTR). Ten isolates, which represent major nodes of VNTR-based minimum spanning tree, were selected and subsequently subjected to multi-locus sequence analyses (MLSA) that include 82 genes...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28431962/structural-basis-chemical-driving-forces-and-biological-implications-of-flavones-as-cu-ii-ionophores
#5
Fang Dai, Wen-Jing Yan, Yu-Ting Du, Xia-Zhen Bao, Xiu-Zhuang Li, Bo Zhou
A main biochemical property of cancer cells, compared with normal cells, is altered redox status including increased levels of copper to maintain their malignant phenotypes. Thus, increasing copper accumulation, by using ionophores, to disrupt abnormal redox homeostasis of cancer cells may be an important anticancer strategy. Naturally occurring molecules with extraordinarily diverse chemical scaffolds are an important source of inspiration for developing copper ionophores. Dietary flavonoids are well-characterized copper chelators and show cancer chemopreventive potential, but their ionophoric role for redox-active copper and the related biological implications have remained unknown...
April 18, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28431586/expression-of-calcitonin-gene-related-peptide-in-the-infrapatellar-fat-pad-in-knee-osteoarthritis-patients
#6
Jun Aikawa, Kentaro Uchida, Shotaro Takano, Gen Inoue, Atsushi Minatani, Masayuki Miyagi, Dai Iwase, Hiroyuki Sekiguchi, Manabu Mukai, Masashi Takaso
BACKGROUND: The infrapatellar fat pad (IPFP) has been implicated as a possible source of osteoarthritis (OA) development and knee pain due to the production of inflammatory mediators and the existence of nerve fibers within this structure. Calcitonin gene-related peptide (CGRP) is a vasodilatory neuropeptide that is localized to joint tissues and has recently been implicated in the development of knee OA and OA pain. To date, however, the expression levels of CGRP in the IPFP of human knee OA patients have not been examined...
April 21, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28431314/effect-of-metals-on-microcystin-abundance-and-environmental-fate
#7
Guofei Dai, Ningyan Peng, Jiayou Zhong, Ping Yang, Binchun Zou, Hui Chen, Qian Lou, Yuanyuan Fang, Wei Zhang
Metals can react with microcystin (MC), which is released from cyanobacterial blooms through various mechanisms; these reactions may mitigate the environmental and health risks of MCs but may also cause harm to aquatic ecosystems and humans. Several studies were conducted, including laboratory tests, ecological simulations, and a field investigation of Poyang Lake. The laboratory studies showed that Fe(3+), Cu(2+), and Pb(2+) stimulated MC photodegradation under high light intensity at the water-sediment interface, which reduced the MC accumulation in the sediment...
April 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28430386/peptidome-analysis-of-human-serum-from-normal-and-preeclamptic-pregnancies
#8
Xiaonan Dai, Xuejing Song, Can Rui, Li Meng, Xuan Xue, Hongjuan Ding, Rong Shen, Jun Li, Jingyun Li, Yuanqing Lu, Wei Long
Preeclampsia is a kind of disease that severely harms the health of pregnant women and infants. To better understand the molecular mechanisms involved in preeclampsia, we used liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) to construct a comparative peptidomic profiling of human serum between normal and preeclamptic pregnancies. A total of 201 peptides were confidently identified, with 21 up-regulated and 3 down-regulated. Further analysis indicated that these differentially expressed peptides correlate with enzyme regulator activity, biological regulation, and coagulation cascades occurring during pathological changes of preeclampsia...
April 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28430152/improved-synthesis-of-1-o-acyl-%C3%AE-d-glucopyranose-tetraacetates
#9
Yu Chen, Huan Lu, Yanyu Chen, Wansheng Yu, Hui Dai, Xianhua Pan
An improved synthesis of 1-O-acyl glucosyl esters that avoids the use of expensive Ag reagents as well as the hydrolysis of unstable glucosyl bromides is reported. Notably, β-configuration products were obtained exclusively in good yields.
April 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28430150/synthesis-and-self-assembly-of-shape-amphiphiles-based-on-poss-dendron-conjugates
#10
Yu Shao, Minyuan Ding, Yujie Xu, Fangjia Zhao, Hui Dai, Xia-Ran Miao, Shuguang Yang, Hui Li
Shape has been increasingly recognized as an important factor for self-assembly. In this paper, a series of shape amphiphiles have been built by linking polyhedral oligomeric silsesquioxane (POSS) and a dendron via linkers of different lengths. Three conjugates of octahedral silsesquioxanes (T₈-POSS) and dendron are designed and synthesized and are referred to as isobutyl T₈-POSS gallic acid derivatives (BPOSS-GAD-1, BPOSS-GAD-2, BPOSS-GAD-3). These samples have been fully characterized by ¹H-NMR, (13)C-NMR, Fourier transform infrared (FT-IR) spectroscopy and matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry to establish their chemical identity and purity...
April 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28429731/the-evolutionary-life-cycle-of-the-polysaccharide-biosynthetic-gene-cluster-based-on-the-sphingomonadaceae
#11
Mengmeng Wu, Haidong Huang, Guoqiang Li, Yi Ren, Zhong Shi, Xiaoyan Li, Xiaohui Dai, Ge Gao, Mengnan Ren, Ting Ma
Although clustering of genes from the same metabolic pathway is a widespread phenomenon, the evolution of the polysaccharide biosynthetic gene cluster remains poorly understood. To determine the evolution of this pathway, we identified a scattered production pathway of the polysaccharide sanxan by Sphingomonas sanxanigenens NX02, and compared the distribution of genes between sphingan-producing and other Sphingomonadaceae strains. This allowed us to determine how the scattered sanxan pathway developed, and how the polysaccharide gene cluster evolved...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429685/interlayer-crosslinked-micelles-prepared-from-star-shaped-copolymers-via-click-chemistry-for-sustained-drug-release
#12
Xiaojin Zhang, Hongquan Wang, Yu Dai
To balance the stability and the particle size of polymeric micelles, star-shaped copolymers Hx-yne-N3-PEG containing both alkynyl and azido groups were synthesized from hyperbranched 2,2-bismethylolpropionic acid polyester (H20 with 16 hydroxyl, H30 with 32 hydroxyl, H40 with 64 hydroxyl) to develop interlayer-crosslinked micelles by click chemistry. The results of dynamic light scattering indicate that the crosslinking could enhance the stability of polymeric micelles. The crosslinked micelles are regular nanosized (approximately 20 nm) spheres observed by a transmission electron microscope...
April 21, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28428845/global-pattern-of-plant-utilization-across-different-organisms-does-plant-apparency-or-plant-phylogeny-matter
#13
Xiaohua Dai, Wei Zhang, Jiasheng Xu, Kevin J Duffy, Qingyun Guo
The present study is the first to consider human and nonhuman consumers together to reveal several general patterns of plant utilization. We provide evidence that at a global scale, plant apparency and phylogenetic isolation can be important predictors of plant utilization and consumer diversity. Using the number of species or genera or the distribution area of each plant family as the island "area" and the minimum phylogenetic distance to common plant families as the island "distance", we fitted presence-area relationships and presence-distance relationships with a binomial GLM (generalized linear model) with a logit link...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28428789/il-10-producing-b-cells-regulate-t-helper-cell-immune-responses-during-1-3-%C3%AE-glucan-induced-lung-inflammation
#14
Fangwei Liu, Xiaowei Lu, Wujing Dai, Yiping Lu, Chao Li, Sitong Du, Ying Chen, Dong Weng, Jie Chen
With the rapid development of industry and farm, fungi contamination widely exists in occupational environment. Inhalation of fungi-contaminated organic dust results in hypersensitivity pneumonitis. 1,3-β-Glucan is a major cell wall component of fungus and is considered as a biomarker of fungi exposure. Current studies showed that 1,3-β-glucan exposure induced lung inflammation, which involved uncontrolled T helper (Th) cell immune responses, such as Th1, Th2, Th17, and regulatory T cell (Treg). A recently identified IL-10-producing B cells (B10) was reported in regulating immune homeostasis...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28428307/draft-genome-sequences-of-three-listeria-monocytogenes-isolates-from-foods-in-china
#15
Xudong Su, Guojie Cao, Dai Kuang, Jianmin Zhang, Yi Chen, Marc Allard, Eric Brown, Xianming Shi, Jianghong Meng, Xuebin Xu
Listeria monocytogenes is a foodborne pathogen of global concern because of the high mortality rate among patients. The draft genome sequences of three L. monocytogenes strains isolated from foods are reported here. The availability of these genomes should provide useful information on the genomic diversity of L. monocytogenes isolated from foods in China.
April 20, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28427943/high-density-lipoprotein-from-coronary-artery-disease-patients-cause-abnormal-expression-of-long-non-coding-rnas-in-vascular-endothelial-cells
#16
Xiang Liu, Tian-Tian Wang, Yan Li, Mao-Mao Shi, Hua-Ming Li, Hao-Xiang Yuan, Zhi-Wei Mo, Jing Chen, Bin Zhang, Yang-Xin Chen, Jing-Feng Wang, Wei-Ping Dai, Ying-Qi Xu, Zhi-Ping Wang, Xi Zhang, Zhi-Jun Ou, Jing-Song Ou
Increased evidence showed that normal high density lipoprotein (HDL) can convert to dysfunction HDL in diseases states including coronary artery disease (CAD), which regulates vascular endothelial cell function differently. Long non-coding RNAs (lncRNAs) play an extensive role in various important biological processes including endothelial cell function. However, whether lncRNAs involved in the regulation of HDL metabolism and HDL-induced changes of vascular endothelial function remains unclear. Cultured human umbilical vein endothelial cells (HUVECs) were treated with HDL from healthy subjects and patients with CAD and hypercholesterolemia for 24 h, then the cells were collected for lncRNA-Seq and the expressions of lncRNAs, genes and mRNAs were identified...
April 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28427774/phosphorus-effects-on-radial-oxygen-loss-root-porosity-and-iron-plaque-in-two-mangrove-seedlings-under-cadmium-stress
#17
Minyue Dai, Jingchun Liu, Wenwen Liu, Haoliang Lu, Hui Jia, Hualong Hong, Chongling Yan
Phosphorus is an indispensable element for plants, but its role in alleviating the cadmium toxicity of mangrove seedlings is poorly documented. In this study, mangrove seedlings were grown in hydroponics and exposed to various Cd and P treatments. Data suggested that the inhibitory effect of Cd on the rate of radial oxygen loss and root porosity was alleviated by P. A. marina had a higher rate of ROL and POR, indicating that it had a stronger adaptability to anaerobic environment. K. obovata induced a higher Fe concentration in iron plaque under co-application of Cd and P, which may relate to higher biomass...
April 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28427617/effects-of-ultrasound-on-microbial-growth-and-enzyme-activity
#18
REVIEW
Guoping Huang, Suwan Chen, Chunhua Dai, Ling Sun, Wenli Sun, Yingxiu Tang, Feng Xiong, Ronghai He, Haile Ma
Nowadays, ultrasound is widely used in many aspects. In the last few years, many papers have concentrated on the applications of ultrasound in engineering, chemistry, medicine, physics and biology, but few in biological effects such as the acceleration effects on proliferation of microbial cells, the inactivation effects on microorganisms and the influences on the activities of enzyme. Thus, the objective of this review is to investigate the biological effects of ultrasound on these aspects.
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427592/pathologic-active-mtor-mutation-in-brain-malformation-with-intractable-epilepsy-leads-to-cell-autonomous-migration-delay
#19
Sae Hanai, Sayuri Sukigara, Hongmei Dai, Tomoo Owa, Shin-Ichi Horike, Taisuke Otsuki, Takashi Saito, Eiji Nakagawa, Naoki Ikegaya, Takanobu Kaido, Noriko Sato, Akio Takahashi, Kenji Sugai, Yuko Saito, Masayuki Sasaki, Mikio Hoshino, Yu-Ichi Goto, Schuichi Koizumi, Masayuki Itoh
The activation of phosphatidylinositol 3-kinase-AKTs-mammalian target of rapamycin cell signaling pathway leads to cell overgrowth and abnormal migration and results in various types of cortical malformations, such as hemimegalencephaly (HME), focal cortical dysplasia, and tuberous sclerosis complex. However, the pathomechanism underlying abnormal cell migration remains unknown. With the use of fetal mouse brain, we performed causative gene analysis of the resected brain tissues from a patient with HME and investigated the pathogenesis...
May 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28427561/molecular-targets-of-ascochlorin-and-its-derivatives-for-cancer-therapy
#20
Jason Chua Min-Wen, Benjamin Chua Yan-Jiang, Srishti Mishra, Xiaoyun Dai, Junji Magae, Ng Shyh-Chang, Alan Prem Kumar, Gautam Sethi
Cancer is an extremely complex disease comprising of a multitude of characteristic hallmarks that continue to evolve with time. At the genomic level, random mutations leading to deregulation of diverse oncogenic signal transduction cascades and polymorphisms coupled with environmental as well as life style-related factors are major causative agent contributing to chemoresistance and the failure of conventional therapies as well as molecular targeted agents. Hence, there is an urgent need to identify novel alternative therapies based on alternative medicines to combat this dreaded disease...
2017: Advances in Protein Chemistry and Structural Biology
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