The infection of rhesus macaques with a chimeric virus uncovers a recipe for broadly neutralizing antibodies
Category: biotech/medical
Nanozymes map nanoparticle routes inside live cells without genetic engineering
Nanoparticles are widely used in medicine to deliver drugs, genes or imaging agents to specific parts of the body. Once a nanoparticle reaches a cell, however, many things can happen—it can reach its target, be degraded, interact with proteins that help transport it, or interact with proteins that hinder its transport.
A longstanding problem in designing nanomedicines has been understanding what happens to nanoparticles at the cellular level, but scientists have faced many challenges. For example, optical microscopy imaging techniques provide only a generalized view of nanomedicine localization.
On the other hand, proteomics approaches require cell lysis, which disrupts the natural distribution of proteins around the nanoparticle, making it difficult to understand how nanoparticles are transported within the cell. Another method—proximity labeling—enables in situ investigation of intracellular protein-protein interactions, but it relies on genetically engineered enzyme fusion, which limits its applicability across diverse systems.
Dual-mobility hip replacement implant can lower dislocation risk by 70%
A new type of hip replacement implant reduces the risk of joint dislocation after surgery by 70%, according to a new study involving 1,600 patients across 44 hospitals in Sweden and the UK, published in The Lancet. The new implant consists of a small ball encased in a much larger plastic ball, which provides better stability.
Each year, more than 14 million patients worldwide suffer a femoral neck fracture. Total hip replacement (THR), in which both the ball and socket of the hip are replaced, is recommended for older, active individuals with a displaced fracture of the femoral neck. While the vast majority regain good mobility and quality of life, up to 8% of these patients experience a dislocation of their hip, a very painful condition in which the artificial joint slips out of place.
Brain dynamics of the « wave of death » highlighted for the first time
In 2023, scientists at the Paris Brain Institute investigated one of the most fascinating and unsettling transitions in neuroscience: what happens to the cortex when the brain is deprived of oxygen.
In a rat model of systemic anoxia, researchers found that the dying brain does not simply “shut off” all at once. Instead, cortical activity follows a structured sequence: brief high-frequency activity, slowing oscillations, electrical silence, and then a massive wave of anoxic depolarization — often called the “wave of death.”
This wave appeared to begin deep in the neocortex, especially around layer 5 pyramidal neurons, before spreading upward toward the cortical surface and downward toward the white matter. These neurons are large, metabolically demanding projection cells, which may make them especially vulnerable when oxygen and ATP collapse.
But the most important part of the study is that this wave did not always represent an absolute point of no return. When oxygenation was restored within a critical window, researchers observed a “wave of resuscitation,” followed by partial recovery of synaptic activity.
That does not mean death has been “reversed” in a simple or sensational sense. But it does suggest something scientifically powerful: the boundary between life and death in the brain may be more dynamic, layered, and measurable than we often imagine.
This is where the implications become fascinating.
If the “wave of death” is an organized biophysical event, future neurocritical care may one day be able to detect the brain’s approach toward irreversible injury in real time. Instead of relying only on broad markers like heartbeat, oxygen saturation, or flat EEG, clinicians may eventually use more detailed brain-state monitoring to identify whether the cortex is entering a reversible, borderline, or irreversible phase.
Diffractive networks enable optical information transfer through random and unknown diffusers
The transmission of optical information through random scattering media is a major challenge in optics, biomedical imaging, telecommunications and remote sensing. When light passes through a turbid or diffusive medium, such as biological tissue or a randomly structured optical material, the original image information can be severely distorted, making reliable recovery difficult.
Researchers at the University of California, Los Angeles (UCLA) have introduced interleaved diffractive networks to address this challenge by enabling optical information transfer through random and unknown diffusers. The work is published in the journal Laser & Photonics Reviews.
Light flips bacterial signaling enzyme between two shapes, unlocking how signals travel
Researchers at the University of Bayreuth and Forschungszentrum Jülich have demonstrated that specific light-sensitive enzymes—so-called sensor histidine kinases (SHKs)—transmit their signal through a light-controlled change in asymmetry. With their new study, the researchers contribute to a better understanding of a central mechanism of bacterial signal processing. This may help develop new tools for biomedicine or biotechnology. The findings are reported in the journal Science Advances.
SHKs are key bacterial signaling proteins that play an important role in many processes, from controlling which genes are active at a given time to enabling the ability to cause disease. Artificially engineered light-sensitive SHKs are also used in optogenetics to precisely control gene activity with light. However, only limited structural information has been available so far for the full protein.
The new study provides important insights into how natural and engineered SHKs transmit signals across multiple protein domains. In the long term, the study may help develop new optogenetic tools that allow biological processes to be precisely controlled using light. This is particularly relevant for applications in biotechnology and biomedicine.
MOF thin films reveal hidden dense packing, challenging decades of porous assumptions
Due to their high porosity, metal-organic frameworks (MOFs) are regarded as promising materials for innovative applications, which is why the Nobel Prize in Chemistry was awarded in 2025 for their discovery. They are used, for example, to store gases, to capture CO2 and for the targeted delivery of medicines.
While the structure of MOFs in the form of large crystals can be determined with relative ease, thin films have largely remained a mystery. Yet it is precisely the structure that is decisive for the properties and for potential applications.
A team led by Roland Resel and Egbert Zojer from the Institute of Solid State Physics at Graz University of Technology (TU Graz), together with colleagues from the Institute of Physical and Theoretical Chemistry (led by Paolo Falcaro) and the Karlsruhe Institute of Technology (led by Christof Wöll), has now solved this puzzle.
Safety and efficacy of mRNA vaccines: a mechanistic and public health perspective
MRNA vaccines represent a transformative advance in vaccinology, combining rapid development timelines, scalable manufacturing, and strong immunogenicity with a favourable safety profile. Global deployment of mRNA vaccines during the COVID-19 pandemic provided an unprecedented real-world evaluation of this platform, with billions of doses administered across diverse populations. In this Review, we critically examine the safety and efficacy of mRNA vaccines from mechanistic, preclinical, clinical, and public health perspectives.
