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Category: biotech/medical

Recent experiments conducted in Boston labs have shown reverse aging results among mice and could show similar results in people.

The combined experiments — which were conducted during a span of 13 years — published Thursday (January 12) in the scientific journal Cell reported that old, blind mice regained eyesight, developed smarter brains and built healthier muscle and kidney tissue, challenging the theory that DNA was the only cause of aging, as it proved that chemical and structural changes to chromatin played a factor without altering genetic code.

The research showed that a breakdown in epigenetic information caused the mice to age and the restoration of the epigenome reversed aging effects.

Continue reading “Researchers Find Way To Reverse Aging” | >

Virus-enveloping macromolecular shells or tilings can prevent viruses from entering cells. Here, we describe the design and assembly of a cone-shaped DNA origami higher-order assembly that can engulf and tile the surface of pleomorphic virus samples larger than 100 nm. We determine the structures of subunits and of complete cone assemblies using cryoelectron microscopy (cryo-EM) and establish stabilization treatments to enable usage in in vivo conditions. We use the cones exemplarily to engulf influenza A virus particles and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), chikungunya, and Zika virus-like particles. Depending on the relative dimensions of cone to virus particles, multiple virus particles may be trapped per single cone, and multiple cones can also tile and adapt to the surface of aspherical virus particles. The cone assemblies form with high yields, require little purification, and are amenable for mass production, which is a key requirement for future real-world uses including as a potential antiviral agent.

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The concept of emergence is controversial to some — for example Eliezer Yudkowski, who favors reductionism, wrote a critique at Less Wrong (see link below). Do reductionists often dismiss emergence?

Ben formalized emergence in his book ‘The Evolving Mind’ as patterns that appear when you put two or more things together that are not there in any of the individual parts.
Book — ‘The Evolving Mind’: http://www.goertzel.org/books/mind/contents.html http://www.amazon.com/Evolving-Futures-General-Evolution-Studies/dp/2881245870

Continue reading “Ben Goertzel — Emergence, Reduction & Artificial Intelligence” | >

A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch that connects a resistor to an antenna. No need to send power to the antenna.

Our system, combined with techniques for harvesting energy from the environment, could lead to all manner of devices that transmit data, including and implanted , without needing batteries or other power sources. These include sensors for smart agriculture, electronics implanted in the body that never need battery changes, better contactless credit cards and maybe even new ways for satellites to communicate.

Continue reading “Device transmits radio waves with almost no power—without violating the laws of physics” | >

In a recent study published in Cell, researchers investigated whether the observed tumor cellular heterogeneity and architecture result from stochastic and chaotic events or whether there is more coordination in the histopathological chaos of cancer. They also explored mechanisms shaping the highly complicated tumor landscape.

Both embryology studies and oncology research activities are aimed at elucidating tissue growth mechanisms; however, they share limited conceptual and technical overlap. Morpho-genomic processes and tissue-level signaling are prime mechanisms in the field of embryology. Researchers have developed various approaches to explore the associated mechanisms; however, cell, genetic, and biological means have been predominantly focused upon, leaving the spatial aspects of tumor cells under-studied in the field of oncology.

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Some young sea spiders can regenerate significant portions of their bottom halves, including muscles, reproductive organs, and the anus, or can function without them, according to a study published on January 23rd in the Proceedings of the National Academy of Sciences.

The ability to regrow body parts is not widely seen, but some species possess this capability. For example, some sea slug heads can regenerate their entire bodies, and sea spiders and other arthropods can regrow parts of their legs. Researchers previously believed that arthropods could only regenerate legs, possibly due to their hard exoskeletons preventing them from regenerating other body parts.

Continue reading “Sea Spiders Show Unusual Ability to Regenerate Nearly Complete Bottom Halves, Study Finds” | >

A study by chemists at the University of Chicago has uncovered a new key step in the process that HIV uses to replicate itself.

The study, published Jan. 6 in Science Advances, used computer modeling to focus on how HIV forms a capsule that carries its genetic material—in particular, the role of a particular ion known as IP6. Scientists had previously suspected IP6 has an important function but didn’t know exactly how it worked.

Continue reading “Tiny ion is crucial for HIV replication, say chemists” | >

The academic community is growing increasingly concerned about students using ChatGPT for less than honest purposes as it has been found to be capable of not only writing essays for high school students, but passing some exams, such as parts of those used to license doctors and grant MBAs.

In two new papers posted on preprint servers, one team and another researcher independently tested the ability of ChatGPT to take and pass exams. In the first a team with members from AnsibleHealth, Inc., Brown University and OpenAI, Inc. describe testing they did to see how well ChatGPT could do on the United States Medical Licensing Examination (USMLE) and posted their results on the medRXiv preprint server.

In the second, Christian Terwiesch, the Andrew M. Heller Professor at Wharton School of the University of Pennsylvania, has posted a paper on Wharton’s preprint site, describing how he tested the chatbot’s ability to perform on the final of a typical Operations Management MBA core course and what he found.

Continue reading “ChatGPT found to be capable of passing exams for MBA and Medical Licensing Exam” | >
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