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https://www.readbyqxmd.com/read/28544217/towards-a-crispr-picture-use-of-crispr-cas9-to-model-diseases-in-human-stem-cells-in-vitro
#1
Jamie L Freiermuth, Ian J Powell-Castilla, G Ian Gallicano
Human induced pluripotent stem cells (iPSCs) can be differentiated into any cell in the body unlocking enormous research potential. Combined with the recent discovery of CRISPR/Cas9 endonucleases in bacteria and their modification for use in biomedical research, these methods have the potential to revolutionize the field of genetic engineering and open the door to generating in vitro models that more closely resemble the in vivo system than ever before. Use of CRISPR/Cas9 has created a whirlwind within the scientific community in the last few years, as the race to move beyond just disease analysis and towards the goal of gene and cell therapy moves further...
May 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28543738/crispr-editing-in-biological-and-biomedical-investigation
#2
Xing-Da Ju, Jing Xu, Zhong Sheng Sun
The CRISPR (clustered regularly interspaced short palindromic repeat)-Cas (CRISPR--associated protein) system, a prokaryotic RNA-based adaptive immune system against viral infection, is emerging as a powerful genome editing tool in broad research areas. To further improve and expand its functionality, various CRISPR delivery strategies have been tested and optimized, and key CRISPR system components such as Cas protein have been engineered with different purposes. Benefiting from more in-depth understanding and further development of CRISPR, versatile CRISPR-based platforms for genome editing have been rapidly developed to advance investigations in biology and biomedicine...
May 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28541217/towards-concurrent-data-transmission-exploiting-plasmid-diversity-by-bacterial-conjugation
#3
Bige D Unluturk, M Siblee Islam, Sasitharan Balasubramaniam, Stepan Ivanov
The progress of molecular communication is tightly connected to the progress of nanomachine design. State-of-the-art states that nanomachines can be built either from novel nanomaterials by the help of nanotechnology or they can be built from living cells which are modified to function as intended by synthetic biology. With the growing need of biomedical applications of MC, we focus on developing bio-compatible communication systems by engineering the cells to become MC nanomachines. Since this approach relies on modifying cellular functions, the improvements in the performance can only be achieved by integrating new biological properties...
May 23, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28538186/an-engineered-virus-library-as-a-resource-for-the-spectrum-wide-exploration-of-virus-and-vector-diversity
#4
Wenli Zhang, Jun Fu, Jing Liu, Hailong Wang, Maren Schiwon, Sebastian Janz, Lukas Schaffarczyk, Lukas von der Goltz, Eric Ehrke-Schulz, Johannes Dörner, Manish Solanki, Philip Boehme, Thorsten Bergmann, Andre Lieber, Chris Lauber, Andreas Dahl, Andreas Petzold, Youming Zhang, A Francis Stewart, Anja Ehrhardt
Adenoviruses (Ads) are large human-pathogenic double-stranded DNA (dsDNA) viruses presenting an enormous natural diversity associated with a broad variety of diseases. However, only a small fraction of adenoviruses has been explored in basic virology and biomedical research, highlighting the need to develop robust and adaptable methodologies and resources. We developed a method for high-throughput direct cloning and engineering of adenoviral genomes from different sources utilizing advanced linear-linear homologous recombination (LLHR) and linear-circular homologous recombination (LCHR)...
May 23, 2017: Cell Reports
https://www.readbyqxmd.com/read/28537344/evaluation-of-the-topic-lists-used-in-two-world-congresses-2015-and-2016-in-physical-and-rehabilitation-medicine
#5
Boya Nugraha, Tatjana Paternostro-Sluga, Othmar Schuhfried, Gerold Stucki, Franco Franchignoni, Lydia Abdul Latif, Julia Patrick Engkasan, Zaliha Omar, Christoph Gutenbrunner
BACKGROUND: Evaluation of the initial list of proposed abstract topics for Congresses of Physical and Rehabilitation Medicine (PRM) was needed in order to ensure its feasibility for use in future congress announcements and invitations for abstract submission. METHODS: The initial proposals were based on 5 main areas of PRM research: biosciences in rehabilitation, biomedical rehabilitation sciences and engineering, clinical PRM sciences, integrative rehabilitation sciences, and human functioning sciences...
May 24, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28534759/new-advances-push-engineered-tissues-toward-3-d-multidisciplinary-collaboration-is-key-to-the-success-of-regenerative-medicine
#6
Leslie Mertz
Although doctors still cannot simply order new, functioning organs for patients who need replacements, researchers in labs around the world are making the important advances in tissue engineering that set the stage for regenerative medicine as well as make other biomedical technologies possible.
May 2017: IEEE Pulse
https://www.readbyqxmd.com/read/28534757/tissue-engineering-and-regenerative-medicine-the-promise-the-challenges-the-future
#7
Leslie Mertz
Medical researchers increasingly regard tissue engineering and regenerative medicine as potential game changers when it comes to repairing damage from disease or injury and restoring function. To understand the progress made and challenges ahead for this combined field, IEEE Pulse sought out two experts: David F. Williams, former global president (2012-2015) of the Tissue Engineering and Regenerative Medicine International Society, and Roderic I. Pettigrew, founding director of the National Institute of Biomedical Imaging and Bioengineering (NIBIB) at the National Institutes of Health (NIH) [1]...
May 2017: IEEE Pulse
https://www.readbyqxmd.com/read/28533376/b12-dependent-photoresponsive-protein-hydrogels-for-controlled-stem-cell-protein-release
#8
Ri Wang, Zhongguang Yang, Jiren Luo, I-Ming Hsing, Fei Sun
Thanks to the precise control over their structural and functional properties, genetically engineered protein-based hydrogels have emerged as a promising candidate for biomedical applications. Given the growing demand for creating stimuli-responsive "smart" hydrogels, here we show the synthesis of entirely protein-based photoresponsive hydrogels by covalently polymerizing the adenosylcobalamin (AdoB12)-dependent photoreceptor C-terminal adenosylcobalamin binding domain (CarHC) proteins using genetically encoded SpyTag-SpyCatcher chemistry under mild physiological conditions...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28532663/recent-developments-in-drug-eluting-devices-with-tailored-interfacial-properties
#9
REVIEW
Eva Sanchez-Rexach, Emilio Meaurio, Jose-Ramon Sarasua
Drug eluting devices have greatly evolved during past years to become fundamental products of great marketing importance in the biomedical field. There is currently a large diversity of highly specialized devices for specific applications, making the development of these devices an exciting field of research. The replacement of the former bare metal devices by devices loaded with drugs allowed the sustained and controlled release of drugs, to achieve the desired local therapeutic concentration of drug. The newer devices have been "engineered" with surfaces containing micro- and nanoscale features in a well-controlled manner, that have shown to significantly affect cellular and subcellular function of various biological systems...
May 4, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28532078/enhancement-of-fibroblast-growing-on-the-mannosylated-surface-of-cellulose-membranes
#10
Simone Birkheur, Paula Cristina de Sousa Faria-Tischer, Cesar A Tischer, Elisângela Flávia Pimentel, Marcio Fronza, Denise Coutinho Endringer, Anna Paola Butera, Renato Márcio Ribeiro-Viana
Bacterial cellulose membrane is a biomaterial with high value in the biomedical field. Many groups have been making efforts to promote chemical modifications of its structure and, consequently, add new characteristics. Recently, our group has developed a methodology to insert monoester succinic acid in bacterial cellulose membrane without disrupting the microfibril network and bind a protein on it. Considering the role of carbohydrates in the molecular recognition process in biological events, we continued these studies by inserting covalently multiples copies of aryl monosaccharide to bacterial cellulose succinylated and to study the in vitro tissue compatibility using fibroblasts...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531339/limtox-a-web-tool-for-applied-text-mining-of-adverse-event-and-toxicity-associations-of-compounds-drugs-and-genes
#11
Andres Cañada, Salvador Capella-Gutierrez, Obdulia Rabal, Julen Oyarzabal, Alfonso Valencia, Martin Krallinger
A considerable effort has been devoted to retrieve systematically information for genes and proteins as well as relationships between them. Despite the importance of chemical compounds and drugs as a central bio-entity in pharmacological and biological research, only a limited number of freely available chemical text-mining/search engine technologies are currently accessible. Here we present LimTox (Literature Mining for Toxicology), a web-based online biomedical search tool with special focus on adverse hepatobiliary reactions...
May 22, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28531126/the-impact-of-halloysite-on-the-thermo-mechanical-properties-of-polymer-composites
#12
REVIEW
Tayser Sumer Gaaz, Abu Bakar Sulong, Abdul Amir H Kadhum, Ahmed A Al-Amiery, Mohamed H Nassir, Ahed Hameed Jaaz
Nanotubular clay minerals, composed of aluminosilicate naturally structured in layers known as halloysite nanotubes (HNTs), have a significant reinforcing impact on polymer matrixes. HNTs have broad applications in biomedical applications, the medicine sector, implant alloys with corrosion protection and manipulated transportation of medicines. In polymer engineering, different research studies utilize HNTs that exhibit a beneficial enhancement in the properties of polymer-based nanocomposites. The dispersion of HNTs is improved as a result of pre-treating HNTs with acids...
May 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28529670/perspective-fabrication-of-integrated-organ-on-a-chip-via-bioprinting
#13
Qingzhen Yang, Qin Lian, Feng Xu
Organ-on-a-chip has emerged as a powerful platform with widespread applications in biomedical engineering, such as pathology studies and drug screening. However, the fabrication of organ-on-a-chip is still a challenging task due to its complexity. For an integrated organ-on-a-chip, it may contain four key elements, i.e., a microfluidic chip, live cells/microtissues that are cultured in this chip, components for stimulus loading to mature the microtissues, and sensors for results readout. Recently, bioprinting has been used for fabricating organ-on-a-chip as it enables the printing of multiple materials, including biocompatible materials and even live cells in a programmable manner with a high spatial resolution...
May 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28528863/cross-linking-of-a-biopolymer-peptide-co-assembling-system
#14
Karla E Inostroza-Brito, Estelle C Collin, Anna Poliniewicz, Sherif Elsharkawy, Alistair Rice, Armando E Del Río Hernández, Xin Xiao, José Rodríguez-Cabello, Alvaro Mata
The ability to guide molecular self-assembly at the nanoscale into complex macroscopic structures could enable the development of functional synthetic materials that exhibit properties of natural tissues such as hierarchy, adaptability, and self-healing. However, the stability and structural integrity of these kinds of materials remains a challenge for many practical applications. We have recently developed a dynamic biopolymer-peptide co-assembly system with the capacity to grow and undergo morphogenesis into complex shapes...
May 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28527187/quantitative-stereological-analysis-of-the-highly-porous-hydroxyapatite-scaffolds-using-x-ray-cm-and-sem
#15
Justyna Zygmuntowicz, Aneta Zima, Joanna Czechowska, Karol Szlazak, Anna Ślosarczyk, Katarzyna Konopka
BACKGROUND: Material properties of the scaffolds as well as their microstructure are vital in determining in vivo cellular response. Three-dimensional (3D), highly porous scaffolds are used in tissue engineering to provide a suitable microenvironment and to support regeneration of bone. Both pore sizes and their architecture, in particular interconnection density, impact functionality of scaffold during its biomedical applications. OBJECTIVE: In this paper a comparative study of the microstructure of highly porous hydroxyapatite scaffolds produced via gelcasting of foamed slurries and replication of polyurethane sponge were carried out...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28525935/design-synthesis-and-characterization-of-doped-titanium-oxide-nanomaterials-with-environmental-and-angiogenic-applications
#16
Susheel Kumar Nethi, Neeraja Aparna Anand P, Beatriz Rico-Oller, Antonio Rodríguez-Diéguez, Santiago Gómez-Ruiz, Chitta Ranjan Patra
Since the last decade, the metal composite nanostructures have evolved as promising candidates in regard to their wide applications in the fields of science and engineering. Recently, several investigators identified the titanium based nanomaterials as excellent agents for multifunctional environmental and biomedical applications. In this perspective, we have developed a series of zinc-doped (2 and 5%) titanium oxide-based nanomaterials using various reaction conditions and calcination temperatures (TZ1-TZ3: calcined at 500°C, TZ4-TZ6: calcined at 600°C and TZ7-TZ9: calcined at 700°C)...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28525578/cell-type-specific-genome-editing-with-a-microrna-responsive-crispr-cas9-switch
#17
Moe Hirosawa, Yoshihiko Fujita, Callum J C Parr, Karin Hayashi, Shunnichi Kashida, Akitsu Hotta, Knut Woltjen, Hirohide Saito
The CRISPR-Cas9 system is a powerful genome-editing tool useful in a variety of biotechnology and biomedical applications. Here we developed a synthetic RNA-based, microRNA (miRNA)-responsive CRISPR-Cas9 system (miR-Cas9 switch) in which the genome editing activity of Cas9 can be modulated through endogenous miRNA signatures in mammalian cells. We created miR-Cas9 switches by using a miRNA-complementary sequence in the 5΄-UTR of mRNA encoding Streptococcus pyogenes Cas9. The miR-21-Cas9 or miR-302-Cas9 switches selectively and efficiently responded to miR-21-5p in HeLa cells or miR-302a-5p in human induced pluripotent stem cells, and post-transcriptionally attenuated the Cas9 activity only in the target cells...
May 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28525280/self-healing-self-assembled-%C3%AE-sheet-peptide-poly-%C3%AE-glutamic-acid-hybrid-hydrogels
#18
David E Clarke, E Thomas Pashuck, Sergio Bertazzo, Jonathan V M Weaver, Molly M Stevens
Self-assembled biomaterials are an important class of materials that can be injected and formed in situ. However, they often are not able to meet the mechanical properties necessary for many biological applications, losing mechanical properties at low strains. We synthesized hybrid hydrogels consisting of a poly(γ-glutamic acid) polymer network physically cross-linked via grafted self-assembling β-sheet peptides to provide non-covalent cross-linking through β-sheet assembly, reinforced with a polymer backbone to improve strain stability...
May 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28523744/bioinspired-ultratough-hydrogel-with-fast-recovery-self-healing-injectability-and-cytocompatibility
#19
Sara Azevedo, Ana M S Costa, Amanda Andersen, Insung S Choi, Henrik Birkedal, João F Mano
Inspired by the mussel byssus adhesiveness, a highly hydrated polymeric structure is designed to combine, for the first time, a set of interesting features for load-bearing purposes. These characteristics include: i) a compressive strength and stiffness in the MPa range, ii) toughness and the ability to recover it upon successive cyclic loading, iii) the ability to quickly self-heal upon rupture, iv) the possibility of administration through minimally invasive techniques, such as by injection, v) the swelling ratio being adjusted to space-filling applications, and vi) cytocompatibility...
May 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28520509/recent-advances-in-electrospun-nanofibers-for-wound-healing
#20
Shixuan Chen, Bing Liu, Mark A Carlson, Adrian F Gombart, Debra A Reilly, Jingwei Xie
Electrospun nanofibers represent a novel class of materials that show great potential in many biomedical applications including biosensing, regenerative medicine, tissue engineering, drug delivery and wound healing. In this work, we review recent advances in electrospun nanofibers for wound healing. This article begins with a brief introduction on the wound, and then discusses the unique features of electrospun nanofibers critical for wound healing. It further highlights recent studies that have used electrospun nanofibers for wound healing applications and devices, including sutures, multifunctional dressings, dermal substitutes, engineered epidermis and full-thickness skin regeneration...
May 18, 2017: Nanomedicine
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