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Archive for the ‘bioengineering’ category: Page 183

Feb 14, 2017

The Biotechnological Wild West: The Good, the Bad, and the Underknown of Synthetic Biology

Posted by in categories: bioengineering, biotech/medical, computing, health, policy, security

While the recent cases of Ebola and Zika contributed to an emphasis on research, response, and policy related to EIDs, the meeting also had presentations on emerging biotechnologies. Of particular note was the Synthetic Biology panel, which focused on the current state of synthetic biology, its use in the health security defense enterprise, and the policy conundrums that need to be addressed.

Synthetic Biology – Complexity through Simplification

The first presenter, Dr. Christopher Voigt of the Synthetic Biology Center at MIT, noted that synthetic biology was the application of engineering principles to biological systems. The end goal of this bioengineering framework is to leverage ever-increasing computer capabilities to simplify both the designing and writing of genomic sequences. Further simplification would then allow for the creation of more complex systems.

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Feb 14, 2017

Nanoparticles Deliver CRISPR/Cas9 Genetic Editor Safely Into Cells

Posted by in categories: bioengineering, biotech/medical, genetics, nanotechnology

CRISPR/Cas9, a powerful gene editing technique that has already been used in a human, is thought by many as a “cut and paste” for DNA in living organisms. While in a sense that is what happens, delivering the ribonucleoprotein that does the genetic editing and the RNA that hones in on the target, into the cellular nucleus without being damaged is a challenge. That is why the efficiency of successful edits remains very low. Researchers at University of Massachusetts Amherst have now come up with nanoparticles that protect the protein and RNA as they’re brought to their work site.

The nanoparticles are engineered around their cargo and have shown a 90% success rate of getting the cargo into the nucleus, and a 30% editing efficiency, which is “remarkable” according to the researchers. So far the team has tested their technique on cultured cells, but they’re already working on trying the same in laboratory animals. As part of their research, they developed a novel way of tracking the Cas9 protein inside the cells, something that will certainly help other scientists in this area.

“By finely tuning the interactions between engineered Cas9En protein and nanoparticles, we were able to construct these delivery vectors. The vectors carrying the Cas9 protein and sgRNA come into contact with the cell membrane, fuse, and release the Cas9:sgRNA directly into the cell cytoplasm,” in a statement said Vincent Rotello, lead author of the study in ACS Nano. “Cas9 protein also has a nuclear guiding sequence that ushers the complex into the destination nucleus. The key is to tweak the Cas9 protein,” he adds. “We have delivered this Cas9 protein and sgRNA pair into the cell nucleus without getting it trapped on its way. We have watched the delivery process live in real time using sophisticated microscopy.”

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Feb 14, 2017

You can now build your own 3D printed bio-bots

Posted by in categories: 3D printing, bioengineering, robotics/AI

Yep; we know and we can even design them to make their own.


You could now 3D print your own tiny walking “bio-bots” powered by living muscle cells and controlled with electrical and light pulses, thanks to a new gennext robot ‘recipe’ developed by scientists.

This can result in exciting possibilities where these “systems could one day demonstrate complex behaviours including self-assembly, self-organisation, self-healing, and adaptation of composition and functionality to best suit their environment,” researchers said.

“The protocol teaches every step of building a bio-bot, from 3D printing the skeleton to tissue engineering the skeletal muscle actuator, including manufacturers and part numbers for every single thing we use in the lab,” said Ritu Raman, a postdoctoral fellow at the University of Illinois at Urbana-Champaign in the US.

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Feb 14, 2017

U.S. experts soften on DNA editing of human eggs, sperm, embryos

Posted by in categories: bioengineering, biotech/medical

By Julie Steenhuysen

CHICAGO (Reuters) — Powerful gene editing tools may one day be used on human embryos, eggs and sperm to remove genes that cause inherited diseases, according to a report by U.S. scientists and ethicists released on Tuesday.

The report from the National Academy of Sciences (NAS) and the National Academy of Medicine said scientific advances make gene editing in human reproductive cells “a realistic possibility that deserves serious consideration.”

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Feb 13, 2017

Luminescence switchable carbon nanodots follow intracellular trafficking and drug delivery

Posted by in categories: bioengineering, biotech/medical, chemistry, nanotechnology

‘Caged’ non-fluorescent carbon dot enters the cancer cell, loses its caging and lights up. Credit: University of Illinois.

Tiny carbon dots have, for the first time, been applied to intracellular imaging and tracking of drug delivery involving various optical and vibrational spectroscopic-based techniques such as fluorescence, Raman, and hyperspectral imaging. Researchers from the University of Illinois at Urbana-Champaign have demonstrated, for the first time, that photo luminescent carbon nanoparticles can exhibit reversible switching of their optical properties in cancer cells.

“One of the major advantages of these agents are their strong intrinsic optical sensitivity without the need for any additional dye/fluorophore and with no photo-bleaching issues associated with it,” explained Dipanjan Pan, an assistant professor of bioengineering and the leader of the study. “Using some elegant nanoscale surface chemistry, we created a molecular ‘masking’ pathway to turn off the fluorescence and then selectively remove the mask leading to regaining the brightness.

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Feb 13, 2017

On demand genetic engineering

Posted by in categories: bioengineering, biotech/medical, food, genetics

CRISPR is now universally accessible. Learn how it will change everything from materials science to food science.

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Feb 13, 2017

Transhumanist politician wants to run for governor of California

Posted by in categories: bioengineering, biotech/medical, economics, genetics, geopolitics, governance, transhumanism

A new story out on Engadget, emphasizing the need to make government treat science and technology as a primary focus:


Zoltan Istvan didn’t have much of a chance at being president, but that didn’t stop him from campaigning as the Transhumanist Party’s candidate to promote his pro-technology and science positions. Now, he’s setting his sights a bit lower, and with a different party. Istvan announced this morning that he plans to run for governor of California in 2018 under the Libertarian Party.

“We need leadership that is willing to use radical science, technology, and innovation—what California is famous for—to benefit us all,” he wrote in a Newsweek article. “We need someone with the nerve to risk the tremendous possibilities to save the environment through bioengineering, to end cancer by seeking a vaccine or a gene-editing solution for it, to embrace startups that will take California from the world’s 7th largest economy to maybe even the largest economy—bigger than the rest of America altogether.”

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Feb 11, 2017

Self-driving cars will create organ shortage — can science meet demand?

Posted by in categories: 3D printing, bioengineering, biotech/medical, robotics/AI, science

It looks like Self Driving cars may create a US organ shortage that finally acts as the Kick in the Ass to force stem cell generated organs on to the market. Enough of the ‘in the future’ we might have these Nonsesne.


Science, however, can offer better a better solution.

The waiting lists for donor organs are long — 120,000 people on a given day — and ever increasing. With fewer donor organs to go around, researchers are working on other ways to get people the parts they need. With help from 3D printing and other bioengineering technologies, we will eventually be able to grow our own organs and stop relying on donors.

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Feb 8, 2017

Engineering Nature: How Improved Photosynthesis Could Feed the World

Posted by in categories: bioengineering, food, genetics

https://youtube.com/watch?v=d6xpQYaxiRc

In Brief

  • Researchers were able to increase the weight of tobacco plants by around 14 to 20 percent compared to unmodified plants by adding in genes to improve the process of photosynthesis.
  • If successful with other plants, the method could improve the yields of food crops such as cowpeas, rice, and cassava and decrease world hunger.

In terms of plants, the concept of genetically modified organisms (GMOs) often refers to the insertion of genetic information from one species of plant to another so that the recipient plant gains a desirable trait. This process has been used extensively to improve crop yields. For example, one type of rice has been made waterproof so that yields aren’t affected by heavy floods from typhoons.

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Feb 8, 2017

Better 3D-printed scaffolds help scientists study cancer

Posted by in categories: 3D printing, bioengineering, biotech/medical

Nice.


Testing treatments for bone cancer tumors may get easier with new enhancements to sophisticated support structures that mimic their biological environment, according to Rice University scientists.

A team led by Rice bioengineer Antonios Mikos has enhanced its three-dimensional printed scaffold to see how Ewing’s sarcoma (bone cancer) cells respond to stimuli, especially shear stress, the force experienced by tumors as viscous fluid such as blood flows through bone. The researchers determined the structure of a scaffold, natural or not, has a very real effect on how cells express signaling proteins that help cancer grow.

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