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Archive for the 'Nanobiotechnology' Category

Conference video: Nanoscale Materials, Devices, and Processing Predicted from First Principles

Posted by Jim Lewis on January 15th, 2016

Prof. William Goddard presented four advances from his research group that enable going from first principles quantum mechanics calculations to realistic nanosystems of interest with millions or billions of atoms.

DNA nanotechnology controls which molecules enter cells

Posted by Jim Lewis on January 13th, 2016

DNA building blocks mimic biological ion channels to more precisely control which molecules can cross a biological membrane.

Nanoparticles ameliorate MS in mice by inducing immune tolerance of myelin

Posted by Jim Lewis on January 7th, 2016

In the first mouse model of the progressive form of multiple sclerosis, nanoparticles that created immune tolerance to myelin prevented the development of progressive MS.

Rolling DNA-based motors increase nano-walker speeds 1000-fold

Posted by Jim Lewis on December 12th, 2015

Coating micrometer-sized glass spheres with hundreds of DNA strands complementary to an RNA covering a glass slide enables the sphere to move, with the help of an enzyme that digests RNA bound to complementary DNA, a thousand times faster than conventional DNA-walkers.

Novel nanoconjugate delivers synergistic combination of microRNAs to treat cancer

Posted by Jim Lewis on December 11th, 2015

Two microRNAs with synergistic effects, one that suppresses tumor growth and another than inhibits tumor promotion, are combined in an RNA triple helix, complexed with a dendrimer to form nanoparticles, which are incorporated with a polymer to form a hydrogel that inhibits tumor growth when applied to the tumor.

Ultrasensitive microRNA assay with nanosensor to detect cancer

Posted by Jim Lewis on December 10th, 2015

A nanotechnology-based sensor provides fast, inexpensive, ultrasensitive assay of microRNA pattern to detect cancer using DNA immobilized on a synthetic gold nanoprism.

Using DNA nanotechnology to position molecules with atomic precision

Posted by Jim Lewis on December 9th, 2015

German researchers have used scaffolded DNA origami to adjust the angle of a DNA hinge joint by altering the length of special “adjuster helices”, causing molecules attached to the sides of the hinge to be displaced by as little as 0.04 nm.

DNA nanomachine lights up to diagnose diseases

Posted by Jim Lewis on November 2nd, 2015

DNA nanotechnology produces an artificial molecular machine that changes shape when it encounters a specific antibody or other protein molecule, and emits light to signal the target’s presence.

Surface assisted self-assembly of DNA origami nanostructures

Posted by Jim Lewis on October 26th, 2015

A lipid bilayer supported by a mica surface assisted the mobile self-assembly of DNA nanostructures of various shapes into micrometer-scale 2D lattices.

Conference video: New Methods of Exploring, Analyzing, and Predicting Molecular Interactions

Posted by Jim Lewis on October 8th, 2015

Prof. Art Olson discussed how we understand what we cannot see directly, how we integrate data from different sources, and how to develop software tools to move forward.

Foresight co-founder on the future of the human lifespan

Posted by Jim Lewis on October 6th, 2015

Optimized Geek podcast featured Christine Peterson on the future of nanotechnology, human lifespan, artificial intelligence, finding love, and other topics.

Nanotechnology carries gene editing package into cells

Posted by Jim Lewis on October 2nd, 2015

Hijacking a viral method of replicating circular genomes, ball-of-yarn-like DNA clews are used to transport the protein and guide RNA molecules needed for gene editing into the cell nucleus.

DNA nanotechnology guides assembling cells into 'Organoids'

Posted by Jim Lewis on September 30th, 2015

DNA strands decorating cell membranes like ‘Velcro’ program the adhesion of cells to other cells or to extracellular matrices to build tiny tissue models.

Catalytic micromotors demonstrate carbon dioxide removal from water

Posted by Jim Lewis on September 29th, 2015

A micromotor covered with the enzyme carbonic anhydrase zips through water rapidly converting dissolved carbon dioxide to the bicarbonate ion, which can then be precipitated as calcium carbonate.

Parallel to protein folding improves DNA origami process

Posted by Jim Lewis on September 27th, 2015

Designing a small DNA origami that can fold in several almost equivalent ways demonstrates how understanding and guiding the folding pathway can improve the efficiency of the folding process, potentially leading in more complex situations to higher yields of the desired nanostructure and fewer misfolded structures.

Nanotechnology provides sensors for liver-on-chip drug testing

Posted by Jim Lewis on September 2nd, 2015

Adding nanotechnology-based optoelectronic sensors to human cells cultured on a chip keeps the cells healthy long enough to replace animal testing with a human liver-on-a-chip.

Novel wireframe nanostructures from new DNA origami design process

Posted by Jim Lewis on August 18th, 2015

A new set of design rules enables constructing any wireframe nanostructure, which may lead to new medical applications and new nanomachines.

Conference video: Artificial Biochemistry with DNA

Posted by Jim Lewis on August 13th, 2015

Modeling DNA strand displacement cascades according to three simple rules can in principle mimic the temporal dynamics of any other chemical system, presenting a method to model regulatory networks even more complicated than those of biology.

Ribosome subunits tethered to make versatile artificial molecular machine

Posted by Jim Lewis on August 11th, 2015

Functional ribosomes with subunits engineered to not separate at the completion of each protein translation cycle make possible engineering systems to make a variety of novel polymers with novel properties.

Automated design of polyhedral meshes for DNA origami

Posted by Jim Lewis on August 7th, 2015

An automated design process folds arbitrary meshes to produce DNA origami structures difficult to design by previous methods, including more open structures that are stable in ionic conditions used in biological assays.