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https://www.readbyqxmd.com/read/28334750/ctc1-mediated-c-strand-fill-in-is-an-essential-step-in-telomere-length-maintenance
#1
Xuyang Feng, Shih-Jui Hsu, Christopher Kasbek, Mary Chaiken, Carolyn M Price
To prevent progressive telomere shortening as a result of conventional DNA replication, new telomeric DNA must be added onto the chromosome end. The de novo DNA synthesis involves elongation of the G-rich strand of the telomere by telomerase. In human cells, the CST complex (CTC1-STN1-TEN1) also functions in telomere replication. CST first aids in duplication of the telomeric dsDNA. Then after telomerase has extended the G-rich strand, CST facilitates fill-in synthesis of the complementary C-strand. Here, we analyze telomere structure after disruption of human CTC1 and demonstrate that functional CST is essential for telomere length maintenance due to its role in mediating C-strand fill-in...
February 23, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334037/ang1-treatment-reduces-muscle-pathology-and-prevents-a-decline-in-perfusion-in-dmd-mice
#2
Kelly M Gutpell, Nikola Tasevski, Boaz Wong, William Thomas Hrinivich, Feng Su, Jennifer Hadway, Lise Desjardins, Ting-Yim Lee, Lisa Marie Hoffman
Vascular endothelial growth factor (VEGF) and other pro-angiogenic growth factors have been investigated to enhance muscle tissue perfusion and repair in Duchenne muscular dystrophy (DMD). Current understanding is limited by a lack of functional data following in vivo delivery of these growth factors. We previously used dynamic contrast-enhanced computed tomography to monitor disease progression in murine models of DMD, but no study to date has utilized this imaging technique to assess vascular therapy in a preclinical model of DMD...
2017: PloS One
https://www.readbyqxmd.com/read/28331230/dentin-sialoprotein-facilitates-dental-mesenchymal-cell-differentiation-and-dentin-formation
#3
Wentong Li, Lei Chen, Zhuo Chen, Lian Wu, Junsheng Feng, Feng Wang, Lisa Shoff, Xin Li, Kevin J Donly, Mary MacDougall, Shuo Chen
Dentin sialoprotein (DSP) is a dentin extracellular matrix protein. It is involved in dental mesenchymal cell lineages and dentin formation through regulation of its target gene expression. DSP mutations cause dentin genetic diseases. However, mechanisms of DSP in controlling dental mesenchymal cell differentiation are unknown. Using DSP as bait, we screened a protein library from mouse odontoblastic cells and found that DSP is a ligand and binds to cell surface receptor, occludin. Further study identified that the C-terminal DSP domain(aa 363-458) interacts with the occludin extracellular loop 2(aa 194-241)...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28306547/synthetic-ct-for-mri-based-liver-stereotactic-body-radiotherapy-treatment-planning
#4
Jeremy S Bredfeldt, Lianli Liu, Mary Feng, Yue Cao, James M Balter
A technique for generating MRI-derived synthetic CT volumes (MRCTs) is demonstrated in support of adaptive liver stereotactic body radiation therapy (SBRT). Under IRB approval, 16 subjects with hepatocellular carcinoma were scanned using a single MR pulse sequence (T1 Dixon). Air-containing voxels were identified by intensity thresholding on T1-weighted, water and fat images. The envelope of the anterior vertebral bodies was segmented from the fat image and fuzzy-C-means (FCM) was used to classify each non-air voxel as mid-density, lower-density, bone, or marrow in the abdomen, with only bone and marrow classified within the vertebral body envelope...
March 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28306506/crystal-structure-of-the-minimal-cas9-from-campylobacter-jejuni-reveals-the-molecular-diversity-in-the-crispr-cas9-systems
#5
Mari Yamada, Yuto Watanabe, Jonathan S Gootenberg, Hisato Hirano, F Ann Ran, Takanori Nakane, Ryuichiro Ishitani, Feng Zhang, Hiroshi Nishimasu, Osamu Nureki
The RNA-guided endonuclease Cas9 generates a double-strand break at DNA target sites complementary to the guide RNA and has been harnessed for the development of a variety of new technologies, such as genome editing. Here, we report the crystal structures of Campylobacter jejuni Cas9 (CjCas9), one of the smallest Cas9 orthologs, in complex with an sgRNA and its target DNA. The structures provided insights into a minimal Cas9 scaffold and revealed the remarkable mechanistic diversity of the CRISPR-Cas9 systems...
March 16, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28270689/dna-methyltransferase-dnmt3a-contributes-to-neuropathic-pain-by-repressing-kcna2-in-primary-afferent-neurons
#6
Jian-Yuan Zhao, Lingli Liang, Xiyao Gu, Zhisong Li, Shaogen Wu, Linlin Sun, Fidelis E Atianjoh, Jian Feng, Kai Mo, Shushan Jia, Brianna Marie Lutz, Alex Bekker, Eric J Nestler, Yuan-Xiang Tao
Nerve injury induces changes in gene transcription in dorsal root ganglion (DRG) neurons, which may contribute to nerve injury-induced neuropathic pain. DNA methylation represses gene expression. Here, we report that peripheral nerve injury increases expression of the DNA methyltransferase DNMT3a in the injured DRG neurons via the activation of the transcription factor octamer transcription factor 1. Blocking this increase prevents nerve injury-induced methylation of the voltage-dependent potassium (Kv) channel subunit Kcna2 promoter region and rescues Kcna2 expression in the injured DRG and attenuates neuropathic pain...
March 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28262027/bis-15-crown-5-ether-pillar-5-arene-k-responsive-channels
#7
Wei-Xu Feng, Zhanhu Sun, Yan Zhang, Yves-Marie Legrand, Eddy Petit, Cheng-Yong Su, Mihail Barboiu
An artificial selective K(+) channel is formed from the supramolecular organization on bis(benzo-15-crown-5- ether-ureido)-pillar[5]arene compound. This channel achieves a selectivity of SK(+)/Na(+) = 5 for an initial transport rate of kK(+) = 3.2 × 10(-3) s(-1). The cation-file diffusion occurs via selective macrocyclic-filters anchored on inactive supporting pillar[5]arene relays. The sandwich-type binding geometry of the K(+) cation by two 15-crown-5 moieties sites is a key feature influencing channel efficiency...
March 6, 2017: Organic Letters
https://www.readbyqxmd.com/read/28241136/tirr-regulates-53bp1-by-masking-its-histone-methyl-lysine-binding-function
#8
Pascal Drané, Marie-Eve Brault, Gaofeng Cui, Khyati Meghani, Shweta Chaubey, Alexandre Detappe, Nishita Parnandi, Yizhou He, Xiao-Feng Zheng, Maria Victoria Botuyan, Alkmini Kalousi, William T Yewdell, Christian Münch, J Wade Harper, Jayanta Chaudhuri, Evi Soutoglou, Georges Mer, Dipanjan Chowdhury
P53-binding protein 1 (53BP1) is a multi-functional double-strand break repair protein that is essential for class switch recombination in B lymphocytes and for sensitizing BRCA1-deficient tumours to poly-ADP-ribose polymerase-1 (PARP) inhibitors. Central to all 53BP1 activities is its recruitment to double-strand breaks via the interaction of the tandem Tudor domain with dimethylated lysine 20 of histone H4 (H4K20me2). Here we identify an uncharacterized protein, Tudor interacting repair regulator (TIRR), that directly binds the tandem Tudor domain and masks its H4K20me2 binding motif...
March 9, 2017: Nature
https://www.readbyqxmd.com/read/28217772/dielectrowetting-manipulation-for-digital-microfluidics-creating-transporting-splitting-and-merging-of-droplets
#9
Hongyao Geng, Jian Feng, Lisa Marie Stabryla, Sung Kwon Cho
Generating, splitting, transporting, and merging droplets are fundamental and critical unit operations for digital (droplet-based) microfluidics. State-of-the-art digital microfluidics performs such operations commonly using electrowetting-on-dielectric (EWOD) in the typical configuration of two parallel channel plates. This paper presents such operations using dielectrowetting (derived from liquid dielectrophoresis), not EWOD, with an array of interdigitated electrodes. The major and unique feature is that the present droplet manipulations are effective for conductive (water with/without surfactant) and non-conductive (propylene carbonate) fluids...
March 14, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28202755/low-pathogenic-influenza-a-viruses-in-north-american-diving-ducks-contribute-to-the-emergence-of-a-novel-highly-pathogenic-influenza-a-h7n8-virus
#10
Yifei Xu, Andrew M Ramey, Andrew S Bowman, Thomas J DeLiberto, Mary L Killian, Scott Krauss, Jacqueline M Nolting, Mia Kim Torchetti, Andrew B Reeves, Richard J Webby, David E Stallknecht, Xiu-Feng Wan
Introductions of low pathogenic avian influenza (LPAI) viruses of subtypes H5 and H7 into poultry from wild birds have the potential to mutate to highly pathogenic avian influenza (HPAI), but such viruses' origins are often unclear. In January 2016, a novel H7N8 HPAI virus caused an outbreak in turkeys in Indiana, USA. To determine the virus's origin, we sequenced genomes of 441 wild bird-origin influenza A viruses (IAVs) from North America and subjected them to evolutionary analyses. Results showed that the H7N8 LPAI virus most likely circulated among diving ducks in the Mississippi flyway during autumn 2015 and was subsequently introduced to Indiana turkeys, in which it evolved high pathogenicity...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28196607/development-of-a-model-web-based-system-to-support-a-statewide-quality-consortium-in-radiation-oncology
#11
Jean M Moran, Mary Feng, Lisa A Benedetti, Robin Marsh, Kent A Griffith, Martha M Matuszak, Michael Hess, Matthew McMullen, Jennifer H Fisher, Teamour Nurushev, Margaret Grubb, Stephen Gardner, Daniel Nielsen, Reshma Jagsi, James A Hayman, Lori J Pierce
PURPOSE: A database in which patient data are compiled allows analytic opportunities for continuous improvements in treatment quality and comparative effectiveness research. We describe the development of a novel, web-based system that supports the collection of complex radiation treatment planning information from centers that use diverse techniques, software, and hardware for radiation oncology care in a statewide quality collaborative, the Michigan Radiation Oncology Quality Consortium (MROQC)...
October 20, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28195206/dentin-sialoprotein-is-a-novel-substrate-of-matrix-metalloproteinase-9-in-vitro-and-in-vivo
#12
Guohua Yuan, Lei Chen, Junsheng Feng, Guobin Yang, Qingwen Ni, Xiaoping Xu, Chunyan Wan, Merry Lindsey, Kevin J Donly, Mary MacDougall, Zhi Chen, Shuo Chen
Dentin sialoprotein (DSP) is essential for dentinogenesis and processed into fragments in the odontoblast-like cells and the tooth compartments. Matrix metalloproteinase 9 (MMP9) is expressed in teeth from early embryonic to adult stage. Although MMP9 has been reported to be involved in some physiological and pathological conditions through processing substrates, its role in tooth development and whether DSP is a substrate of MMP9 remain unknown. In this study, the function of MMP9 in the tooth development was examined by observation of Mmp9 knockout (Mmp9-/-) mouse phenotype, and whether DSP is a substrate of MMP9 was explored by in vitro and in vivo experiments...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28187864/relation-of-household-income-to-incidence-of-sudden-unexpected-death-in-wake-county-north-carolina
#13
Louisa A Mounsey, Feng-Chang Lin, Irion Pursell, Golsa Joodi, Mary Elizabeth Lewis, Anthony Nwosu, Chani Hodonsky, Ross J Simpson, J Paul Mounsey
The incidence of out-of-hospital sudden unexpected death (OHSUD) in a racially and socioeconomically diverse population has been inadequately studied. We collated all OHSUDs over a 24-month period among 18- to 64-year olds in Wake County, North Carolina, to investigate geographic and socioeconomic disparity in incidence of OHSUD. An electronic query of Wake County Emergency Medical Services (EMS) identified all EMS attended out-of-hospital deaths. After excluding trauma, expected deaths, and deaths occurring in non-free-living subjects, medical records and medical examiner's reports were reviewed by a committee of cardiologists to make the determination of OHSUD...
April 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28179375/quantitative-prediction-of-human-renal-clearance-and-drug-drug-interactions-of-organic-anion-transporter-substrates-using-in-vitro-transport-data
#14
Sumathy Mathialagan, Mary A Piotrowski, David A Tess, Bo Feng, John Litchfiled, Manthena V Varma
Organic anion transporters (OATs) play an important role in the renal secretion of drugs, and their functional change can result in pharmacokinetic variability. In this study, we applied transport rates measured using OAT-transfected human embryonic kidney cells to predict human renal secretory and total renal clearance of 31 diverse drugs. Selective substrates to OAT1 (tenofovir), OAT2 (acyclovir and ganciclovir) and OAT3 (benzylpenicillin, oseltamivir acid) were used to obtain relative activity factors (RAFs) for these individual transporters by relating in vitro transport clearance to in vivo secretory clearance...
February 8, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28177540/-pyrene-box-cages-for-the-confinement-of-biogenic-amines
#15
Mihail Barboiu, Wei-Xu Feng, Arie van der Lee, Yves-Marie Legrand, Cheng Yong Su, Eddy Petit
The complete structure of non-crystalline compounds can be determined by confining them in crystalline structures. The reduced motional degrees of freedom of encapsulated guests can be obtained via their anchoring to the host cages that allows reducing a significant amount of disorder. The "Pyrene-box" cages easily crystallizing form aqueous solutions are recommended to achieve complete structure elucidation of compounds of biological interest. In this study, the "Pyrene-Box" cages have been used for the in-situ encapsulation of biogenic amines: histamine, dopamine and serotonin...
February 8, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28146470/rare-and-low-frequency-coding-variants-alter-human-adult-height
#16
Eirini Marouli, Mariaelisa Graff, Carolina Medina-Gomez, Ken Sin Lo, Andrew R Wood, Troels R Kjaer, Rebecca S Fine, Yingchang Lu, Claudia Schurmann, Heather M Highland, Sina Rüeger, Gudmar Thorleifsson, Anne E Justice, David Lamparter, Kathleen E Stirrups, Valérie Turcot, Kristin L Young, Thomas W Winkler, Tõnu Esko, Tugce Karaderi, Adam E Locke, Nicholas G D Masca, Maggie C Y Ng, Poorva Mudgal, Manuel A Rivas, Sailaja Vedantam, Anubha Mahajan, Xiuqing Guo, Goncalo Abecasis, Katja K Aben, Linda S Adair, Dewan S Alam, Eva Albrecht, Kristine H Allin, Matthew Allison, Philippe Amouyel, Emil V Appel, Dominique Arveiler, Folkert W Asselbergs, Paul L Auer, Beverley Balkau, Bernhard Banas, Lia E Bang, Marianne Benn, Sven Bergmann, Lawrence F Bielak, Matthias Blüher, Heiner Boeing, Eric Boerwinkle, Carsten A Böger, Lori L Bonnycastle, Jette Bork-Jensen, Michiel L Bots, Erwin P Bottinger, Donald W Bowden, Ivan Brandslund, Gerome Breen, Murray H Brilliant, Linda Broer, Amber A Burt, Adam S Butterworth, David J Carey, Mark J Caulfield, John C Chambers, Daniel I Chasman, Yii-Der Ida Chen, Rajiv Chowdhury, Cramer Christensen, Audrey Y Chu, Massimiliano Cocca, Francis S Collins, James P Cook, Janie Corley, Jordi Corominas Galbany, Amanda J Cox, Gabriel Cuellar-Partida, John Danesh, Gail Davies, Paul I W de Bakker, Gert J de Borst, Simon de Denus, Mark C H de Groot, Renée de Mutsert, Ian J Deary, George Dedoussis, Ellen W Demerath, Anneke I den Hollander, Joe G Dennis, Emanuele Di Angelantonio, Fotios Drenos, Mengmeng Du, Alison M Dunning, Douglas F Easton, Tapani Ebeling, Todd L Edwards, Patrick T Ellinor, Paul Elliott, Evangelos Evangelou, Aliki-Eleni Farmaki, Jessica D Faul, Mary F Feitosa, Shuang Feng, Ele Ferrannini, Marco M Ferrario, Jean Ferrieres, Jose C Florez, Ian Ford, Myriam Fornage, Paul W Franks, Ruth Frikke-Schmidt, Tessel E Galesloot, Wei Gan, Ilaria Gandin, Paolo Gasparini, Vilmantas Giedraitis, Ayush Giri, Giorgia Girotto, Scott D Gordon, Penny Gordon-Larsen, Mathias Gorski, Niels Grarup, Megan L Grove, Vilmundur Gudnason, Stefan Gustafsson, Torben Hansen, Kathleen Mullan Harris, Tamara B Harris, Andrew T Hattersley, Caroline Hayward, Liang He, Iris M Heid, Kauko Heikkilä, Øyvind Helgeland, Jussi Hernesniemi, Alex W Hewitt, Lynne J Hocking, Mette Hollensted, Oddgeir L Holmen, G Kees Hovingh, Joanna M M Howson, Carel B Hoyng, Paul L Huang, Kristian Hveem, M Arfan Ikram, Erik Ingelsson, Anne U Jackson, Jan-Håkan Jansson, Gail P Jarvik, Gorm B Jensen, Min A Jhun, Yucheng Jia, Xuejuan Jiang, Stefan Johansson, Marit E Jørgensen, Torben Jørgensen, Pekka Jousilahti, J Wouter Jukema, Bratati Kahali, René S Kahn, Mika Kähönen, Pia R Kamstrup, Stavroula Kanoni, Jaakko Kaprio, Maria Karaleftheri, Sharon L R Kardia, Fredrik Karpe, Frank Kee, Renske Keeman, Lambertus A Kiemeney, Hidetoshi Kitajima, Kirsten B Kluivers, Thomas Kocher, Pirjo Komulainen, Jukka Kontto, Jaspal S Kooner, Charles Kooperberg, Peter Kovacs, Jennifer Kriebel, Helena Kuivaniemi, Sébastien Küry, Johanna Kuusisto, Martina La Bianca, Markku Laakso, Timo A Lakka, Ethan M Lange, Leslie A Lange, Carl D Langefeld, Claudia Langenberg, Eric B Larson, I-Te Lee, Terho Lehtimäki, Cora E Lewis, Huaixing Li, Jin Li, Ruifang Li-Gao, Honghuang Lin, Li-An Lin, Xu Lin, Lars Lind, Jaana Lindström, Allan Linneberg, Yeheng Liu, Yongmei Liu, Artitaya Lophatananon, Jian'an Luan, Steven A Lubitz, Leo-Pekka Lyytikäinen, David A Mackey, Pamela A F Madden, Alisa K Manning, Satu Männistö, Gaëlle Marenne, Jonathan Marten, Nicholas G Martin, Angela L Mazul, Karina Meidtner, Andres Metspalu, Paul Mitchell, Karen L Mohlke, Dennis O Mook-Kanamori, Anna Morgan, Andrew D Morris, Andrew P Morris, Martina Müller-Nurasyid, Patricia B Munroe, Mike A Nalls, Matthias Nauck, Christopher P Nelson, Matt Neville, Sune F Nielsen, Kjell Nikus, Pål R Njølstad, Børge G Nordestgaard, Ioanna Ntalla, Jeffrey R O'Connel, Heikki Oksa, Loes M Olde Loohuis, Roel A Ophoff, Katharine R Owen, Chris J Packard, Sandosh Padmanabhan, Colin N A Palmer, Gerard Pasterkamp, Aniruddh P Patel, Alison Pattie, Oluf Pedersen, Peggy L Peissig, Gina M Peloso, Craig E Pennell, Markus Perola, James A Perry, John R B Perry, Thomas N Person, Ailith Pirie, Ozren Polasek, Danielle Posthuma, Olli T Raitakari, Asif Rasheed, Rainer Rauramaa, Dermot F Reilly, Alex P Reiner, Frida Renström, Paul M Ridker, John D Rioux, Neil Robertson, Antonietta Robino, Olov Rolandsson, Igor Rudan, Katherine S Ruth, Danish Saleheen, Veikko Salomaa, Nilesh J Samani, Kevin Sandow, Yadav Sapkota, Naveed Sattar, Marjanka K Schmidt, Pamela J Schreiner, Matthias B Schulze, Robert A Scott, Marcelo P Segura-Lepe, Svati Shah, Xueling Sim, Suthesh Sivapalaratnam, Kerrin S Small, Albert Vernon Smith, Jennifer A Smith, Lorraine Southam, Timothy D Spector, Elizabeth K Speliotes, John M Starr, Valgerdur Steinthorsdottir, Heather M Stringham, Michael Stumvoll, Praveen Surendran, Leen M 't Hart, Katherine E Tansey, Jean-Claude Tardif, Kent D Taylor, Alexander Teumer, Deborah J Thompson, Unnur Thorsteinsdottir, Betina H Thuesen, Anke Tönjes, Gerard Tromp, Stella Trompet, Emmanouil Tsafantakis, Jaakko Tuomilehto, Anne Tybjaerg-Hansen, Jonathan P Tyrer, Rudolf Uher, André G Uitterlinden, Sheila Ulivi, Sander W van der Laan, Andries R Van Der Leij, Cornelia M van Duijn, Natasja M van Schoor, Jessica van Setten, Anette Varbo, Tibor V Varga, Rohit Varma, Digna R Velez Edwards, Sita H Vermeulen, Henrik Vestergaard, Veronique Vitart, Thomas F Vogt, Diego Vozzi, Mark Walker, Feijie Wang, Carol A Wang, Shuai Wang, Yiqin Wang, Nicholas J Wareham, Helen R Warren, Jennifer Wessel, Sara M Willems, James G Wilson, Daniel R Witte, Michael O Woods, Ying Wu, Hanieh Yaghootkar, Jie Yao, Pang Yao, Laura M Yerges-Armstrong, Robin Young, Eleftheria Zeggini, Xiaowei Zhan, Weihua Zhang, Jing Hua Zhao, Wei Zhao, Wei Zhao, He Zheng, Wei Zhou, Jerome I Rotter, Michael Boehnke, Sekar Kathiresan, Mark I McCarthy, Cristen J Willer, Kari Stefansson, Ingrid B Borecki, Dajiang J Liu, Kari E North, Nancy L Heard-Costa, Tune H Pers, Cecilia M Lindgren, Claus Oxvig, Zoltán Kutalik, Fernando Rivadeneira, Ruth J F Loos, Timothy M Frayling, Joel N Hirschhorn, Panos Deloukas, Guillaume Lettre
Height is a highly heritable, classic polygenic trait with approximately 700 common associated variants identified through genome-wide association studies so far. Here, we report 83 height-associated coding variants with lower minor-allele frequencies (in the range of 0.1-4.8%) and effects of up to 2 centimetres per allele (such as those in IHH, STC2, AR and CRISPLD2), greater than ten times the average effect of common variants. In functional follow-up studies, rare height-increasing alleles of STC2 (giving an increase of 1-2 centimetres per allele) compromised proteolytic inhibition of PAPP-A and increased cleavage of IGFBP-4 in vitro, resulting in higher bioavailability of insulin-like growth factors...
February 9, 2017: Nature
https://www.readbyqxmd.com/read/28132830/flexible-near-field-wireless-optoelectronics-as-subdermal-implants-for-broad-applications-in-optogenetics
#17
Gunchul Shin, Adrian M Gomez, Ream Al-Hasani, Yu Ra Jeong, Jeonghyun Kim, Zhaoqian Xie, Anthony Banks, Seung Min Lee, Sang Youn Han, Chul Jong Yoo, Jong-Lam Lee, Seung Hee Lee, Jonas Kurniawan, Jacob Tureb, Zhongzhu Guo, Jangyeol Yoon, Sung-Il Park, Sang Yun Bang, Yoonho Nam, Marie C Walicki, Vijay K Samineni, Aaron D Mickle, Kunhyuk Lee, Seung Yun Heo, Jordan G McCall, Taisong Pan, Liang Wang, Xue Feng, Tae-Il Kim, Jong Kyu Kim, Yuhang Li, Yonggang Huang, Robert W Gereau, Jeong Sook Ha, Michael R Bruchas, John A Rogers
In vivo optogenetics provides unique, powerful capabilities in the dissection of neural circuits implicated in neuropsychiatric disorders. Conventional hardware for such studies, however, physically tethers the experimental animal to an external light source, limiting the range of possible experiments. Emerging wireless options offer important capabilities that avoid some of these limitations, but the current size, bulk, weight, and wireless area of coverage is often disadvantageous. Here, we present a simple but powerful setup based on wireless, near-field power transfer and miniaturized, thin, flexible optoelectronic implants, for complete optical control in a variety of behavioral paradigms...
February 8, 2017: Neuron
https://www.readbyqxmd.com/read/28125085/the-next-generation-of-population-based-spinal-muscular-atrophy-carrier-screening-comprehensive-pan-ethnic-smn1-copy-number-and-sequence-variant-analysis-by-massively-parallel-sequencing
#18
Yanming Feng, Xiaoyan Ge, Linyan Meng, Jennifer Scull, Jianli Li, Xia Tian, Tao Zhang, Weihong Jin, Hanyin Cheng, Xia Wang, Mari Tokita, Pengfei Liu, Hui Mei, Yue Wang, Fangyuan Li, Eric S Schmitt, Wei V Zhang, Donna Muzny, Shu Wen, Zhao Chen, Yaping Yang, Arthur L Beaudet, Xiaoming Liu, Christine M Eng, Fan Xia, Lee-Jun Wong, Jinglan Zhang
PURPOSE: To investigate pan-ethnic SMN1 copy-number and sequence variation by hybridization-based target enrichment coupled with massively parallel sequencing or next-generation sequencing (NGS). METHODS: NGS reads aligned to SMN1 and SMN2 exon 7 were quantified to determine the total combined copy number of SMN1 and SMN2. The ratio of SMN1 to SMN2 was calculated based on a single-nucleotide difference that distinguishes the two genes. SMN1 copy-number results were compared between the NGS and quantitative polymerase chain reaction and/or multiplex ligation-dependent probe amplification...
January 26, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28117580/cagw-peptide-and-peg-modified-gene-carrier-for-selective-gene-delivery-and-promotion-of-angiogenesis-in-huvecs-in-vivo
#19
Jing Yang, Xuefang Hao, Qian Li, Mary Akpanyung, Abdelilah Nejjari, Agnaldo Luis Neve, Xiangkui Ren, Jintang Guo, Yakai Feng, Changcan Shi, Wencheng Zhang
Gene therapy is a promising strategy for angiogenesis, but developing gene carriers with low cytotoxicity and high gene delivery efficiency in vivo is a key issue. In the present study, we synthesized the CAGW peptide- and poly(ethylene glycol) (PEG)-modified amphiphilic copolymers. CAGW peptide serves as a targeting ligand for endothelial cells (ECs). Different amounts of CAGW peptide were effectively conjugated to the amphiphilic copolymer via heterofunctional poly(ethylene glycol). These CAG- and PEG-modified copolymers could form nanoparticles (NPs) by self-assembly method and were used as gene carriers for the pEGFP-ZNF580 (pZNF580) plasmid...
January 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094352/star-shaped-copolymer-grafted-pei-and-redv-as-a-gene-carrier-to-improve-migration-of-endothelial-cells
#20
Juan Lv, Xuefang Hao, Qian Li, Mary Akpanyung, Abdelilah Nejjari, Agnaldo Luis Neve, Xiangkui Ren, Yakai Feng, Changcan Shi, Wencheng Zhang
In this work, a biodegradable star-shaped copolymer poly(lactide-co-3(S)-methyl-morpholine-2,5-dione)6 (Star-(PLMD)6) was synthesized via ring-opening polymerization (ROP), and subsequently a gene carrier Star-PLMD-g-PEI-g-PEG-CREDVW was prepared by grafting polyethyleneimine (PEI), polyethylene glycol (PEG) and targeting peptide REDV onto Star-(PLMD)6. This gene carrier could form stable micelles to condense pEGFP-ZNF580 through electrostatic interaction. The resulting complexes were biocompatible and showed high efficiency in gene delivery...
January 17, 2017: Biomaterials Science
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