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https://www.readbyqxmd.com/read/28329681/sirt6-promotes-dna-end-joining-in-ipscs-derived-from-old-mice
#1
Wen Chen, Nana Liu, Hongxia Zhang, Haiping Zhang, Jing Qiao, Wenwen Jia, Songcheng Zhu, Zhiyong Mao, Jiuhong Kang
Induced pluripotent stem cells (iPSCs) have great potential for treating age-related diseases, but the genome integrity of iPSCs is critically important. Here, we demonstrate that non-homologous end joining (NHEJ), rather than homologous recombination (HR), is less efficient in iPSCs from old mice than young mice. We further find that Sirt6 is downregulated in iPSCs from old mice. Sirt6 directly binds to Ku80 and facilitates the Ku80/DNA-PKcs interaction, thus promoting DNA-PKcs phosphorylation at residue S2056, leading to efficient NHEJ...
March 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28329418/covalent-crosslinking-of-graphene-quantum-dots-by-mcmurry-deoxygenation-coupling
#2
Shaowei Chen, Limei Chen, Peiguangf Hu, Jia En Lu
Graphene quantum dots were covalently crosslinked forming ensembles of a few hundred nanometers in size by McMurry deoxygenation coupling reactions of peripheral carbonyl functional moieties catalyzed by TiCl4 and Zn powders in refluxing THF, as manifested in TEM, AFM, FTIR, Raman and XPS measurements. Photoluminescence measurements showed that after chemical coupling, the excitation and emisison peaks blue-shifted somewhat and the emission intensity increased markedly, likely due to the removal of oxygenated species where quinone-like species were known to be effective electron-acceptors and emission quenchers...
March 22, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28329139/duration-of-device-detected-subclinical-atrial-fibrillation-and-occurrence-of-stroke-in-assert
#3
Isabelle C Van Gelder, Jeff S Healey, Harry J G M Crijns, Jia Wang, Stefan H Hohnloser, Michael R Gold, Alessandro Capucci, Chu-Pak Lau, Carlos A Morillo, Anne H Hobbelt, Michiel Rienstra, Stuart J Connolly
Background: ASSERT demonstrated that subclinical atrial fibrillation (SCAF) is common in pacemaker patients without prior AF and is associated with increased risk of ischemic stroke or systemic embolism. SCAF episodes vary in duration and little is known about the incidence of different durations of SCAF, or their prognosis. Methods and results: ASSERT followed 2580 patients receiving a pacemaker or ICD, aged >65 years with hypertension, without prior AF. The effect of SCAF duration on subsequent risk of ischemic stroke or embolism was evaluated with time-dependent covariate Cox models...
March 1, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329063/lysosomal-proteolysis-is-associated-with-exercise-induced-improvement-of-mitochondrial-quality-control-in-aged-hippocampus
#4
Li Luo, Jia-Ru Dai, Shan-Shan Guo, A-Ming Lu, Xiao-Fang Gao, Yan-Rong Gu, Xiao-Fei Zhang, Hai-Dong Xu, Yan Wang, Zhou Zhu, Lisa J Wood, Zheng-Hong Qin
Exercise improves cognitive function in older adults, but the underlying mechanism is largely unknown. Both lysosomal degradation and mitochondrial quality control decline with age. We hypothesized that exercise ameliorates age-related cognitive decline through the improvement of mitochondrial quality control in aged hippocampus, and this effect is associated with lysosomal proteolysis. Sixteen to eighteen-month old male Sprague Dawley rats underwent swim exercise training for 10 weeks. The exercise regimen prevented cognitive decline in aged rats, reduced oxidative stress, and rejuvenated mitochondria in the aged hippocampus...
January 19, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28328969/oral-tegafur-uracil-as-metronomic-therapy-following-intravenous-folfox-for-stage-iii-colon-cancer
#5
Wen-Yen Huang, Ching-Liang Ho, Chia-Cheng Lee, Cheng-Wen Hsiao, Chang-Chieh Wu, Shu-Wen Jao, Jen-Fu Yang, Cheng-Hsiang Lo, Jia-Hong Chen
The purpose of this study was to estimate the impact of metronomic therapy with oral tegafur-uracil (UFUR) following an intravenous FOLFOX regimen as surgical adjuvant chemotherapy on the overall survival (OS) and disease-free survival (DFS) of stage III colon cancer patients. From the retrospective database of patients who underwent a surgical resection for colorectal cancer at the Tri-Service General Hospital from October 2008 through December 2014, stage III colon carcinomas treated with radical R0 resection were reviewed...
2017: PloS One
https://www.readbyqxmd.com/read/28328542/an-excited-state-intramolecular-photon-transfer-fluorescence-probe-for-localizable-live-cell-imaging-of-cysteine
#6
Wei Liu, Wen Chen, Si-Jia Liu, Jian-Hui Jiang
Small molecule probes suitable for selective and specific fluorescence imaging of some important but low-concentration intracellular reactive sulfur species such as cysteine (Cys) pose a challenge in chemical biology. We present a readily available, fast-response fluorescence probe CHCQ-Ac, with 2-(5'-chloro-2-hydroxyl-phenyl)-6-chloro-4(3 H)-quinazolinone (CHCQ) as the fluorophore and acrylate group as the functional moiety, that enables high-selectivity and high-sensitivity for detecting Cys in both solution and biological system...
March 22, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28328310/developing-human-radiation-biodosimetry-models-testing-cross-species-conversion-approaches-using-an-ex-vivo-model-system
#7
Jin G Park, Sunirmal Paul, Natalia Briones, Jia Zeng, Kristin Gillis, Garrick Wallstrom, Joshua LaBaer, Sally A Amundson
In the event of a large-scale radiation exposure, accurate and quick assessment of radiation dose received would be critical for triage and medical treatment of large numbers of potentially exposed individuals. Current methods of biodosimetry, such as the dicentric chromosome assay, are time consuming and require sophisticated equipment and highly trained personnel. Therefore, scalable biodosimetry approaches, including gene expression profiles in peripheral blood cells, are being investigated. Due to the limited availability of appropriate human samples, biodosimetry development has relied heavily on mouse models, which are not directly applicable to human response...
March 22, 2017: Radiation Research
https://www.readbyqxmd.com/read/28328176/glucose-responsive-supramolecular-vesicles-based-on-water-soluble-pillar-5-arene-and-pyridylboronic-acid-derivative-for-controlled-insulin-delivery
#8
Lei Gao, Tingting Wang, Keke Jia, Xuan Wu, Chenhao Yao, Wei Shao, Dongmei Zhang, Xiao-Yu Hu, Leyong Wang
The stimuli-responsive behavior of supramolecular nanocarriers is crucial for their potential applications as smart drug delivery systems. We hereby constructed a glucose-responsive supramolecular drug delivery system constructed by the host-guest interaction between a water-soluble pillar[5]arene (WP5) and a pyridylboronic acid derivative (G) for insulin delivery and controlled release at physiological condition, which represents the ideal treatment of diabetes mellitus. The drug loading and in vitro drug release experiments demonstrated that large molecular weight insulin could be successfully encapsulated into the vesicles with high loading efficiency, which to the best of our knowledge, is the first example of small size supramolecular vesicles with excellent encapsulation capacity of large protein molecule...
March 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28328100/smart-mechanosensing-machineries-enable-migration-of-vascular-smooth-muscle-cells-in-atherosclerosis-relevant-3d-matrices
#9
REVIEW
Qingjia Chi, Jieling Shan, Xiaorong Ding, Tieying Yin, Yazhou Wang, Dongyu Jia, Guixue Wang
At the early stage of atherosclerosis, neointima is formed due to the migration of vascular smooth muscle cells (VSMCs) from the media to the intima. VSMCs are surrounded by highly adhesive 3D matrices. They take specific strategies to cross various 3D matrices in the media, including heterogeneous collagen and mechanically-strong basement membrane. Migration of VSMCs is potentially caused by biomechanical mechanism. Most in vitro studies focus on cell migration on 2D substrates in response to biochemical factors...
March 22, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28328098/plasma-exchange-successfully-treated-macrophage-activation-syndrome-in-rheumatoid-factor-positive-polyarticular-juvenile-idiopathic-arthritis-with-combined-pneumonia
#10
Lianjie Shi, Fanlei Hu, Chuanhui Xu, Huaqun Zhu, Di Qie, Chuanjie Yuan, Yuhong Tao, Hanmin Liu
Macrophage activation syndrome (MAS) is one of the serious complications associated with rheumatic diseases, especially systemic juvenile idiopathic arthritis (sJIA). Here we describe a 9-year-old girl with rheumatoid factor (RF)-positive polyarticular JIA, not sJIA, combined with pneumonia who was successfully treated by plasma exchange. She was diagnosed with RF-positive polyarticular JIA based on positive RF and multiple joint swelling and tenderness 3 years ago. She was admitted in our hospital with myalgia for 2 days and a high fever for half a day...
March 22, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28328017/dental-pulp-stem-cells-promote-regeneration-of-damaged-neuron-cells-on-the-cellular-model-of-alzheimer-s-disease
#11
Feixiang Wang, Yali Jia, Jiajing Liu, Jinglei Zhai, Ning Cao, Wen Yue, Huixia He, Xuetao Pei
Alzheimer's disease (AD) is an incurable neurodegenerative disease and many types of stem cells have been used in AD therapy with some favorable effects. In this study, we investigated the potential therapeutical effects of human dental pulp stem cells (hDPSCs) on AD cellular model which established by okadaic acid (OA)-induced damage to human neuroblastoma cell line, SH-SY5Y, in vitro for 24h. After confirmed the AD cellular model, the cells were co-culture with hDPSCs by transwell co-culture system till 24 h for treatment...
March 22, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28327946/draft-genome-of-the-northern-snakehead-channa-argus
#12
Jian Xu, Chao Bian, Kunci Chen, Guiming Liu, Yanliang Jiang, Qing Luo, Xinxin You, Wenzhu Peng, Jia Li, Yu Huang, Yunhai Yi, Chuanju Dong, Hua Deng, Songhao Zhang, Hanyuan Zhang, Qiong Shi, Peng Xu
Background: The Northern snakehead ( Channa argus ), a member of the Channidae family of the Perciformes, and is an economically important freshwater fish native to East Asia. In North America, it has become notorious as an intentionally released invasive species. Its ability to breathe air with gills and migrate short distances over land makes it a good model for bimodal breath research. Therefore, recent research has focused on the identification of relevant candidate genes. Here, we performed whole genome sequencing of C...
March 2, 2017: GigaScience
https://www.readbyqxmd.com/read/28327943/whole-genome-sequencing-of-chinese-clearhead-icefish-protosalanx-hyalocranius
#13
Kai Liu, Dongpo Xu, Jia Li, Chao Bian, Jinrong Duan, Yanfeng Zhou, Minying Zhang, Xinxin You, Yang You, Jieming Chen, Hui Yu, Gangchun Xu, Di-An Fang, Jun Qiang, Shulun Jiang, Jie He, Junmin Xu, Qiong Shi, Zhiyong Zhang, Pao Xu
Background: Chinese clearhead icefish, Protosalanx hyalocranius , is a representative icefish species with economic importance and special appearance. Due to its great economic values in China, the fish was introduced into Lake Dianchi and several other lakes from the Lake Taihu half a century ago. Similar to the Sinocyclocheilus cavefish, the clearhead icefish has certain cavefish-like traits, such as transparent body and nearly scaleless skin. Here, we provide the whole genome sequence of this surface-dwelling fish and generated a draft genome assembly, aiming at exploring molecular mechanisms for the biological interests...
February 24, 2017: GigaScience
https://www.readbyqxmd.com/read/28327673/corrigendum-universal-stress-protein-rv2624c-alters-abundance-of-arginine-and-enhances-intracellular-survival-by-atp-binding-in-mycobacteria
#14
Qiong Jia, Xinling Hu, Dawei Shi, Yan Zhang, Meihao Sun, Jianwei Wang, Kaixia Mi, Guofeng Zhu
No abstract text is available yet for this article.
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327671/candidate-loci-involved-in-domestication-and-improvement-detected-by-a-published-90k-wheat-snp-array
#15
Lifeng Gao, Guangyao Zhao, Dawei Huang, Jizeng Jia
Selection is one of the most important forces in crop evolution. Common wheat is a major world food crop and a typical allopolyploid with a huge and complex genome. We applied four approaches to detect loci selected in wheat during domestication and improvement. A total of 7,984 candidate loci were detected, accounting for 23.3% of all 34,317 SNPs analysed, a much higher proportion than estimated in previous reports. We constructed a first generation wheat selection map which revealed the following new insights on genome-wide selection: (1) diversifying selection acted by increasing, decreasing or not affecting gene frequencies; (2) the number of loci under selection during domestication was much higher than that during improvement; (3) the contribution to wheat improvement by the D sub-genome was relatively small due to the bottleneck of hexaploidisation and diversity can be expanded by using synthetic wheat and introgression lines; and (4) clustered selection regions occur throughout the wheat genome, including the centromere regions...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327665/akirin2-regulates-proliferation-and-differentiation-of-porcine-skeletal-muscle-satellite-cells-via-erk1-2-and-nfatc1-signaling-pathways
#16
Xiaoling Chen, Yanliu Luo, Zhiqing Huang, Gang Jia, Guangmang Liu, Hua Zhao
Akirin2, a novel nuclear factor, plays an important role in myogenesis. To investigate the role of Akirin2 in proliferation and differentiation of porcine skeletal muscle satellite cells, Akirin2 overexpression and Akirin2 silence technologies were employed. Our results showed that overexpression of Akirin2 markedly enhanced the proliferation and differentiation of porcine skeletal muscle satellite cells, whereas silencing of Akirin2 got the opposite results. Furthermore, our results showed that Akirin2 affected proliferation and differentiation of porcine skeletal muscle satellite cells through extracellular-signal regulated kinase-1/2 (ERK1/2) and NFATc1 signaling pathways...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327561/erratum-osteopontin-deficiency-alters-biliary-homeostasis-and-protects-against-gallstone-formation
#17
Jing Lin, Ming Lu, Wei-Qing Shao, Zong-You Chen, Wen-Wei Zhu, Lu Lu, Hu-Liang Jia, Duan Cai, Lun-Xiu Qin, Jin-Hong Chen
No abstract text is available yet for this article.
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327354/the-neural-correlates-of-vertical-disparity-gradient-and-cue-conflict-in-panum-s-limiting-case
#18
Huayun Li, Huibin Jia, Ashley Chung-Fat-Yim, Laipeng Jin, Dongchuan Yu
Although Panum's limiting case has been extensively researched, only recently has it been discovered that in addition to horizontal disparity, the final perception of depth is influenced by (i) the vertical disparity gradient and (ii) the degree of cue conflict between 2D and 3D shapes. The present study examines the neural correlates of the two factors, using EEG while observers viewed several versions of stereoscopic stimuli, which depicted Panum's limiting case. In these patterns the vertical disparity gradient was varied from 0...
March 16, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28326835/polymorphisms-of-cancer-stem-cell-marker-gene-cd133-are-associated-with-susceptibility-and-prognosis-of-gastric-cancer
#19
Zhi-Fang Jia, Yan-Hua Wu, Dong-Hui Cao, Xue-Yuan Cao, Jing Jiang, Bao-Sen Zhou
AIM: This study was aimed to investigate the associations between single nucleotide polymorphisms of cancer stem cell marker genes, CD44 and CD133, and susceptibility and prognosis of gastric cancer. PATIENTS & METHODS: Five single nucleotide polymorphisms in CD44 and CD133 genes were genotyped in 898 gastric cancer cases and 992 controls. RESULTS: The A/C or C/C genotypes of CD133 rs2240688 were associated with decreased risk of gastric cancer comparing with the A/A genotype (odds ratio: 0...
February 24, 2017: Future Oncology
https://www.readbyqxmd.com/read/28326791/enantioselective-synthesis-of-dilignol-model-compounds-and-their-stereodiscrimination-study-with-a-dye-decolorizing-peroxidase
#20
Gaochao Huang, Ruben Shrestha, Kaimin Jia, Brian V Geisbrecht, Ping Li
A four-step enantioselective approach was developed to synthesize anti (1R,2S)-1a and (1S,2R)-1b containing a β-O-4 linkage in good yields. A significant difference was observed for the apparent binding affinities of four stereospecific lignin model compounds with TcDyP by surface plasmon resonance, which was not translated into a significant difference in enzyme activities. The discrepancy may be attributed to the conformational change involving a loop widely present in DyPs upon H2O2 binding.
March 22, 2017: Organic Letters
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