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Category: biotech/medical – Page 2

What one sleepless night does to brain connections and why sleep may reset them

A night without sleep produced increased markers of connections between brain cells, showing that sleep in humans may be important for restoring cellular balance in the brain, according to a study published in PLOS Biology by David Elmenhorst from the Forschungszentrum Jülich Institute of Neuroscience and Medicine in North Rhine-Westphalia, Germany, and colleagues.

Scientists have long wondered why humans and other animals need to sleep. One potential mechanism is that sleep is required to restore synaptic connections and homeostasis in the brain. Synapses—the connections between brain cells—become stronger during wakefulness.

This increases the amount of energy the brain needs and leads to a buildup of proteins in the brain. Sleep is thought to reset these levels, reducing synaptic connections and restoring homeostasis, but evidence has thus far been limited to animal models.

Vagus nerve stimulation may quiet pain through newly mapped brainstem pathway

Physical pain is essential for survival, as it allows animals to detect when they are injured or unwell, seek shelter and address their ailments. Yet when it becomes chronic, pain can also become highly distressing and debilitating.

While there are now several therapeutic strategies for managing chronic pain, an emerging one that has been found to be particularly promising is vagus nerve stimulation (VNS). VNS entails the delivery of mild electrical pulses to the nerve that connects the brain to organs throughout the body.

Past studies suggest that VNS-based therapy can reduce the pain associated with various medical conditions, including chronic headaches, fibromyalgia and joint inflammation. The neural processes by which it can ease pain, however, are still poorly understood.

Discovery of BIRC3 gene variants in Crohn’s disease yields a druggable pathway

Researchers from The Hospital for Sick Children (SickKids) in Toronto have found a previously unknown genetic cause of Crohn’s disease and uncovered how those changes trigger inflammation through a key immune pathway. The findings, published in Gastroenterology and involving teams from eight countries, will guide more precise treatments and improve the ability to match patients to therapies based on their unique biology.

“We’ve brought together genetics, RNA sequencing, proteomics and more to try for the first time to map the complete disease pathway, and it’s turned into a remarkable precision medicine story,” says lead author Dr. Aleixo Muise, senior scientist in the Cell & Systems Biology program, staff gastroenterologist and co-director of the Inflammatory Bowel Disease (IBD) Centre at SickKids.

“In our SickKids clinic, we want to find the right drug for each person based on their body’s unique signature. That’s why this paper is so exciting: We have pinpointed a druggable pathway.”

3 Age-Reversal Therapies Being Tested Right Now

Most people still think Longevity Escape Velocity is a distant future. But what if some of the technologies that could make it possible are already being tested right now?

In this video, we look at three emerging longevity therapies: partial epigenetic reprogramming, senescent-cell removal, and stem-cell based repair. Some are already in human trials, while others are still early and experimental, but together they show how medicine may begin shifting from treating age-related disease to repairing parts of aging itself.

1:16 — THERAPY #1 — Partial epigenetic reprogramming.
3:34 — THERAPY #2 — SenoVax immune cleanup.
5:24 — THERAPY #3 — Lomecel — B — stem-cell therapy.
7:07 — CONCLUSION — From theory to repair.

📚 SOURCES AND STUDIES MENTIONED

ER-100 / partial epigenetic reprogramming:

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Scientists Visualize the Complex, Dynamic World Inside a Human Cell

The interactive image was created for Cell Signaling Technology, Inc., and was inspired by the work of David Goodsell, a professor of computational biology at Scripps Research Institute, who is widely recognized for his vibrant watercolor paintings of cells and viruses. Alongside some artistic interpretation, portions of the image were digitally rendered using datasets gathered through scientific methods.

“This 3D rendering of a eukaryotic cell is modeled using X-ray, nuclear magnetic resonance (NMR), and cryo-electron microscopy datasets for all of its molecular actors,” explains McGill. “It is an attempt to recapitulate the myriad pathways involved in signal transduction, protein synthesis, endocytosis, vesicular transport, cell-cell adhesion, apoptosis, and other processes.”

Although some online are calling it “the most detailed image of a human cell ever captured” Evan Ingersoll and Gael McGill emphasize that it’s really an educational tool. Elements of the cell have been simplified, and in some cases “squashed together,” to help viewers better understand what happens inside it.

Mathematical modeling helps advance use of magnetic particles in targeted drug-delivery systems

A Florida State University computational scientist is paving the way for future medical breakthroughs by developing mathematical models and simulations to predict the behavior of a unique drug-delivery method, which aims to deploy treatments directly to targeted sites in the body.

Florida State University Associate Professor of Scientific Computing Bryan Quaife is part of a multi-institutional team of engineers, mathematicians and computational scientists conducting foundational research essential to the design of a drug-delivery system that could reduce medication side effects while increasing treatment efficacy. Their research expands on work proposing the use of magnetic particles to guide cell-like drug carriers toward a specific target, like a tumor.

This work, which was published in Physical Review Letters, reveals how tiny particles moving inside microscopic drug carriers can gradually stress and eventually rupture the enclosing membrane. These findings could help engineers design smarter drug-delivery systems to protect therapeutic cargo during transport and release it on demand at the desired location.

Molecular machinery in cardiac mitochondria reacts to metabolic stress in unexpected way

In a recent study published in Nature Communications, researchers at Karolinska Institutet report that the molecular machinery responsible for cellular energy conversion is more interconnected than previously understood, shedding light on how mitochondria adapt under stress.

Mitochondria generate most of the cell’s energy by converting nutrients into ATP, the molecule that powers nearly all cellular processes. Although ATP synthase and metabolic pathways such as the tricarboxylic acid (TCA) cycle have long been known to work together, they have generally been viewed as separate systems.

How chromatin movement helps control gene expression

In a new study, MIT researchers have measured chromatin movement at timescales ranging from hundreds of microseconds to hours, allowing them to rigorously quantify those dynamics for the first time.

Their analysis revealed that chromatin can exist in two different categories: In one, chromatin moves in a constrained way that allows it to primarily contact only neighboring regions of the genome; in the other, chromatin moves more freely and contacts regions that are farther away, but only over longer timescales.

The findings offer insight into how gene expression is regulated, as well as how chromatin segments come together for other processes such as DNA repair, the researchers say.

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