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Mapping protein production in brain cells yields new insights for brain disease

The brain’s ability to do everything from forming memories to coordinating movement relies on its cells producing the right proteins at the right time. But directly measuring this protein production, known as translation, across different types of brain cells has been a challenge.

Now, scientists at University of California School of Medicine, Scripps Research and their colleagues have developed a technology that reveals which proteins are generated by individual brain cells. The team used their method—called Ribo-STAMP—to create the first maps of protein production across nearly 20,000 individual cells in the mouse hippocampus, a brain region essential for learning and memory.

The study was published in Nature.

Lipid droplet-induced T cell death sustains autoimmune tissue inflammation

Kumar et al. identify a metabolically controlled trait of CD4+ T cells in autoimmune disease. Exposed to fatty acids in rheumatoid joints, they form lipid droplets containing pore-forming gasdermin D and its activator zDHHC5. These droplets induce plasma membrane lysis, resulting in the leakage of intracellular contents and tissue inflammation.

Record-breaking photons at telecom wavelengths

A team of researchers from the University of Stuttgart and the Julius-Maximilians-Universität Würzburg led by Prof. Stefanie Barz (University of Stuttgart) has demonstrated a source of single photons that combines on-demand operation with record-high photon quality in the telecommunications C-band—a key step toward scalable photonic quantum computation and quantum communication. “The lack of a high-quality on-demand C-band photon source has been a major problem in quantum optics laboratories for over a decade—our new technology now removes this obstacle,” says Prof. Stefanie Barz.

The key: Identical photons on demand In everyday life, distinguishing features may often be desirable. Few want to be exactly like everyone else. When it comes to quantum technologies, however, complete indistinguishability is the name of the game. Quantum particles such as photons that are identical in all their properties can interfere with each other—much as in noise-canceling headphones, where sound waves that are precisely inverted copies of the incoming noise cancel out the background.

When identical photons are made to act in synchrony, then the probability that certain measurement outcomes occur can be either boosted or decreased. Such quantum effects give rise to powerful new phenomena that lie at the heart of emerging technologies such as quantum computing and quantum networking. For these technologies to become feasible, high-quality interference between photons is essential.

Gut-derived metabolite hippuric acid ‘turns up’ immune inflammation, study finds

Scientists at The Wistar Institute have identified a previously overlooked mediator in the body’s response to life-threatening infections: hippuric acid, a metabolite produced when gut bacteria break down polyphenols from berries, tea, and other plant-based foods. The research reveals that this molecule acts as an immune-system amplifier, boosting the body’s inflammatory defenses during early infection but elevating them to deadly levels when infections progress to sepsis.

Published in Cell Reports, the study demonstrates that elevated hippuric acid levels correlate with increased mortality in sepsis patients, while also uncovering the molecular mechanisms by which this metabolite modifies immune responses. The findings could lead to new approaches for managing severe infections and, potentially, for treating pancreatic cancer.

“Hippuric acid is a metabolite that has historically been seen as a benign byproduct of metabolism and is therefore understudied,” said Rahul S. Shinde, D.V.M., Ph.D., assistant professor in the Molecular and Cellular Oncogenesis Program at the Ellen and Ronald Caplan Cancer Center at The Wistar Institute and senior author of the study. “This paper identifies that it’s not just a passive byproduct. It has bioactive potential to influence the immune system.”

The Hume Band Might Be the Smartest Wearable for Stress + Recovery Yet

The Hume Band is quickly becoming one of the most interesting smart wearables in the longevity and performance space.

It tracks stress using HRV and other physiological signals distinguishing between productive stress (like training) and chronic stress (like anxiety). On top of that, it monitors the full suite of vitals: heart rate, SpO₂, respiratory rate, skin temperature, strain, and recovery.

The best part? It actually makes the data usable, instead of overwhelming.

If you want to try the Hume Band, use my link to save money and support the channel.

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BREAKTHROUGH: How Consciousness Creates the Simulation | Dr. Donald Hoffman

Cognitive Scientist, Dr. Donald Hoffman returns to the mind meld!
Are we, as Plato argued thousands of years ago, mistaking shadows on a cave wall for reality?

In this conversation with the brilliant Dr. Donald Hoffman, we question whether space-time and the world we experience with our senses is fundamental or merely a shallow projection of something deeper. Drawing on Plato’s cave, physics, cognitive science, mystical traditions, quantum theory, and Hoffman’s own framework of conscious agents, we explore the possibility that reality emerges from consciousness rather than the other way around. Don also shares what could be a mind blowing breakthrough in his theory.
What is reality? Will science ever find a final theory of everything? Are we locked inside a simulation designed for survival, not truth? If consciousness transcends space-time, what does that imply about our potential, our perception, our purpose and our fate as beings? We riff on all of this and more in this mind meld.

Links for Donald Hoffman:
New to Don’s work? Start with this TED Talk: https://youtu.be/oYp5XuGYqqY?si=dJJzY05c1koiTYb4
Don’s book, The Case Against Reality: https://a.co/d/0aGapviw.
Don’s UC Irvine page: https://sites.socsci.uci.edu/~ddhoff/

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Chitosan-nickel biomaterial becomes stronger when wet, and could replace plastics

A new study led by the Institute for Bioengineering of Catalonia (IBEC) has unveiled the first biomaterial that is not only waterproof but actually becomes stronger in contact with water. The material is produced by the incorporation of nickel into the structure of chitosan, a chitinous polymer obtained from discarded shrimp shells. The development of this new biomaterial marks a departure from the plastic-age mindset of making materials that must isolate from their environment to perform well. Instead, it shows how sustainable materials can connect and leverage their environment, using their surrounding water to achieve mechanical performance that surpasses common plastics.

Plastics have become an integral part of modern society thanks to their durability and resistance to water. However, precisely these properties turn them into persistent disruptors of ecological cycles. As a result, unrecovered plastic is accumulating across ecosystems and becoming an increasingly ubiquitous component of global food chains, raising growing concerns about potential impacts on human health.

In an effort to address this challenge, the use of biomaterials as substitutes for conventional plastics has long been explored. However, their widespread adoption has been limited by a fundamental drawback: Most biological materials weaken when exposed to water. Traditionally, this vulnerability has forced engineers to rely on chemical modifications or protective coatings, thereby undermining the sustainability benefits of biomaterial-based solutions.

In This Issue

In contrast with modern birds, the Cretaceous theropod dinosaur Microraptor possessed multiple wings, with long feathers on its arms, legs, and tail. The flight capabilities of Microraptor are not well-understood. Csaba Hefler et al. analyzed the aerodynamics and forewing–hindwing interactions of Microraptor based on anatomical data from more than 100 fossilized specimens. The authors modeled fixed-wing gliding flight with the wings of Microraptor at low, moderate, and high angles of attack, which represent angles between the body axis and the direction of incoming air flow. The modeling suggested that synergistic interactions between vortices created by the leading edges of the forewings and hindwings could have provided a substantial and sustained boost to lift while gliding under a variety of conditions. The simulated forewing–hindwing interactions resemble aerodynamic effects seen in dragonflies. Vortices formed by the distinctively flared tip of the Microraptor hindwing contributed additional lift, a specialized feature not seen in other early multiwinged birds, such as Archaeopteryx and Anchiornis. The analysis suggests that Microraptor likely used aerodynamic features comparable to those seen in modern flying animals while gliding. According to the authors, the findings push back the evolution of sophisticated flight dynamics to the Early Cretaceous Period. — M.H.

Read online.

Kirigami-inspired sensors precisely map activity of neurons in the primate brain

Recent technological advances have opened new exciting possibilities for the development of smart prosthetics, such as artificial limbs, joints or organs that can replace injured, damaged or amputated body parts. These same advances are also enabling the development of other systems that connect the brain with machines, to record the activity of neurons or allow humans to operate machines in entirely new ways.

Researchers at the Chinese Institute for Brain Research, the National Center for Nanoscience and Technology in Beijing and other institutes recently developed a new flexible and implantable sensor that can record the activity of neurons in the brain of non-human primates. The sensing device, introduced in a paper published in Nature Electronics, is inspired by kirigami, an artistic discipline that entails the creation of intricate structures by folding and cutting paper in specific ways.

“The development of brain–computer interfaces requires implantable microelectrode arrays that can interface with numerous neurons across large spatial and temporal scales,” wrote Runjiu Fang, Huihui Tian and their colleagues in their paper.

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