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Category: biotech/medical – Page 315

Metal organic frameworks enable a key step toward greener lighting and display technologies

Scientists at Oregon State University have taken a big step toward lighting and display technologies that are more energy efficient and better for the planet. The work centers around crystalline, porous materials known as metal organic frameworks, often abbreviated as MOFs, and points toward next-generation materials that may end reliance on rare earth metals.

The study by Kyriakos Stylianou, associate professor of chemistry in the OSU College of Science, and graduate students Kyle Smith and Ankit Yadav appears in Nature Communications.

The findings are important because displays—ubiquitous in communications, computing, medical monitoring and many other aspects of everyday life—and lighting contribute heavily to global energy consumption and . The that underpin those technologies—europium, terbium, yttrium, cerium, gadolinium and others—are expensive and environmentally hazardous to mine and process.

Scientists map dendritic cell reactions to mRNA vaccines

Belgian scientists have uncovered new details about how the immune system responds to vaccines. Dendritic cells, which are key immune messengers that help kick-start the body’s defenses, show specific responses to lipid nanoparticles. These findings, published in Cell Reports, could lead to safer and more effective vaccines.

Dendritic cells are among the first to detect viruses, bacteria, or other immune challenges. These cells help coordinate the immune system’s response by alerting T cells, the immune system’s soldiers trained to eliminate threats. But dendritic cells don’t always respond in the same way. Some keep the immune system calm and balanced (homeostatic), while others drive a full immune attack (immunogenic).

Until now, little was known about what determines these different responses, especially when dendritic cells encounter vaccines.

Statistical mechanics method helps machines better understand complex systems

A study by University of Hawaiʻi researchers is advancing how we learn the laws that govern complex systems—from predator-prey relationships to traffic patterns in cities to how populations grow and shift—using artificial intelligence (AI) and physics.

The research, published in Physical Review Research, introduces a new method based on to improve the discovery of equations directly from noisy real-world data. Statistical mechanics is a branch of physics that explains how collective behavior emerges from individual particles, such as how the random motion of gas molecules leads to predictable changes in pressure and temperature.

In this new work, statistical mechanics is used to understand how different mathematical models “compete” when trying to explain a system. This matters because many scientific fields rely on understanding how systems change over time, whether tracking disease spread, analyzing or predicting the stock market. But real-world data is often messy, and traditional AI models can be unreliable when the data gets noisy or incomplete.

The Rise of Mechanobiology for Advanced Cell Engineering and Manufacturing

The rise of cell-based therapies, regenerative medicine, and synthetic biology, has created an urgent need for efficient cell engineering, which involves the manipulation of cells for specific purposes. This demand is driven by breakthroughs in cell manufacturing, from fundamental research to clinical therapies. These innovations have come with a deeper understanding of developmental biology, continued optimization of mechanobiological processes and platforms, and the deployment of advanced biotechnological approaches. Induced pluripotent stem cells and immunotherapies like chimeric antigen receptor T cells enable personalized, scalable treatments for regenerative medicine and diseases beyond oncology. But continued development of cell manufacturing and its concomitant clinical advances is hindered by limitations in the production, efficiency, safety, regulation, cost-effectiveness, and scalability of current manufacturing routes. Here, recent developments are examined in cell engineering, with particular emphasis on mechanical aspects, including biomaterial design, the use of mechanical confinement, and the application of micro-and nanotechnologies in the efficient production of enhanced cells. Emerging approaches are described along each of these avenues based on state-of-the-art fundamental mechanobiology. It is called on the field to consider mechanical cues, often overlooked in cell manufacturing, as key tools to augment or, at times, even to replace the use of traditional soluble factors.

Current manufacturing workflows for CAR-based immunotherapies, particularly CAR T, and the emerging CAR NK and CAR macrophage platforms, generally involve four key stages: (i) isolation of primary immune cells or their precursors, (ii) cell activation or differentiation, (iii) genetic modification with CAR constructs, most often via viral vectors or electroporation (EP), and (iv) expansion or preparation for reinfusion. Among these, transfection remains the most critical and technically challenging step, directly influencing the functionality, safety, and scalability of the final product.

In clinical-scale production, EP remains the most widely used non-viral method for gene delivery into immune cells, yet it is increasingly recognized as suboptimal, particularly when delivering large or complex CAR constructs. It suffers from inefficient nuclear delivery, high cell toxicity, and poor functional yields of viable, potent CAR-expressing cells.[ 113 ] These limitations are further exacerbated in more fragile or less permissive cell types, such as NK cells and macrophages, which show lower transfection efficiencies and greater sensitivity to electroporation-induced stress.[ 114 ] Viral vectors, while still dominant in clinical manufacturing, present their own challenges: they are constrained by limited cargo capacity, are costly to produce at scale, and raise regulatory and safety concerns, especially when applied to emerging CAR-NK and CAR macrophage therapies that require flexible, transient, or multiplexed genetic programs.[ 115 ]

In contrast to immune-cell engineering, stem cell-based approaches present a different set of challenges and engineering requirements. While immune cells are genetically modified to enhance cytotoxicity[ 116 ] and specificity or to mitigate excessive T-cell activation,[ 117 ] stem cells must be engineered to control self-renewal, lineage commitment, and functional integration, often requiring precise, non-integrative delivery of genetic or epigenetic modulators (e.g., mRNA, episomal vectors) to maintain cellular identity and safety.[ 118 ] Stem cells hold exceptional therapeutic promise due to their capacity for self-renewal and differentiation into specialized cell types, supporting applications in personalized disease modeling, tissue repair, and organ regeneration.[ 119 ] However, engineering stem cells in a safe, efficient, and clinically relevant manner remains a major challenge. Conventional delivery methods, such as viral vectors and EP, can compromise genomic integrity,[ 120 ] reduce viability,[ 118 ] and induce epigenetic instability,[ 121 ] limiting their translational potential.

New Minimally Invasive Procedure Can Fix Your Heart’s Tricuspid Valve

A Yale interventional cardiologist explains how a new clip can fix a faulty tricuspid valve, relieving symptoms for patients who once had limited options.

There weren’t always good solutions for repairing a faulty tricuspid valve, the valve on the right side of the heart that allows blood to flow from the top chamber to the bottom one. In fact, for many years, a lack of safe and effective treatments contributed to the tricuspid’s nickname: “the forgotten valve.”

For the 1.6 million people in the United States who have tricuspid valve regurgitation, a condition in which a faulty tricuspid valve causes blood to leak backwards (or backflow), medication has difficult side effects, including serious kidney problems. And while open heart surgery can effectively repair the condition, it’s risky for many patients who are older, have tricuspid-related issues such as liver disease, and may have other medical conditions that are more common with age. But without treatment, they experience a poor quality of life, with symptoms such as irregular heart rhythms, fatigue, swelling in the legs, shortness of breath, and, in severe cases, heart failure.

(November 2024)

A Yale Medicine interventional cardiologist discusses a new minimally invasive clip for tricuspid valve regurgitation, a treatment that can help some patients avoid open heart surgery.

Key nervous system components shown to influence gastrointestinal tumor growth

Australian researchers have identified two nervous system components that drive tumor growth in gastrointestinal cancers, creating promising new avenues for treatment with existing approved therapies.

Our gut contains its very own nervous system and is commonly regarded as the second brain. Key players of this system are neuropeptides, the signaling factors that are produced and released by nerves. These factors relay messages throughout our nervous system by connecting to receptors on the outside of cells, influencing a variety of processes.

The team at the Olivia Newton-John Cancer Research Institute (ONJCRI) and La Trobe School of Cancer Medicine discovered that CGRP, a common neuropeptide, and its receptor RAMP1 influence tumor growth in colorectal and stomach cancers.

Gene variant that protects against norovirus spread with arrival of agriculture, prehistoric DNA reveals

The arrival of agriculture coincided with a sharp rise in a gene variant that protected against the virus that causes winter vomiting, researchers from Karolinska Institutet and Linköping University report after analyzing DNA from over 4,300 prehistoric individuals and cultivating “mini guts.”

Winter vomiting disease is caused by the norovirus, which is most virulent during the colder half of the year. The infection clears up after a couple of days, but the protection it provides is short-lived, meaning that the same person can repeatedly fall sick in a short space of time. But some people cannot succumb to the virus, thanks to a particular gene variant.

“We wanted to trace the historical spread of the gene variant,” says Hugo Zeberg, senior lecturer in genetics at the Department of Physiology and Pharmacology, Karolinska Institutet, and researcher at the Max Planck Institute for Evolutionary Anthropology in Leipzig.

Family and peer conflicts predict teenage mental health issues, study finds

Identifying the factors that contribute to psychopathology and increase the risk of experiencing specific mental health conditions is a long-standing goal for many psychology researchers. While past studies have highlighted the crucial role of some experiences, particularly challenging events unfolding during childhood and adolescence, in the development of mental health disorders, their influence is often difficult to quantify and differentiate from other factors that could contribute to psychopathology.

Recent technological advances, particularly the development of increasingly sophisticated and computational analysis tools, have opened new possibilities for the study of disorders and their underlying patterns. When used to analyze the large amounts of data collected by and professionals over the past decades, these methods could help to uncover correlations between specific variables and hidden trends that are associated with psychopathology.

Researchers at Washington University in St. Louis and Washington University School of Medicine recently set out to explore the possible contribution of different factors to poor mental health among teenagers using data mining techniques (i.e., computational approaches to uncover patterns in data). Their findings, published in Nature Mental Health, suggest that , particularly conflicts between , bullying or a loss of reputation among peers, are the strongest predictors of psychopathology in adolescents.

A flexible lens controlled by light-activated artificial muscles promises to let soft machines see

Inspired by the human eye, our biomedical engineering lab at Georgia Tech has designed an adaptive lens made of soft, light-responsive, tissuelike materials. Our study is published in the journal Science Robotics.

Adjustable camera systems usually require a set of bulky, moving, solid lenses and a pupil in front of a camera chip to adjust focus and intensity. In contrast, human eyes perform these same functions using soft, flexible tissues in a highly compact form.

Our lens, called the photo-responsive hydrogel soft lens, or PHySL, replaces rigid components with soft polymers acting as artificial muscles. The polymers are composed of a hydrogel —a water-based polymer material. This hydrogel muscle changes the shape of a soft lens to alter the lens’s focal length, a mechanism analogous to the ciliary muscles in the human eye.

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