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Category: health – Page 20

Newly discovered mechanism of mitochondrial dysfunction in obesity may drive insulin resistance and type 2 diabetes

A newly discovered mechanism that leads to liver dysfunction may be a key factor in type 2 diabetes and other metabolic disorders in individuals with obesity, according to a new study led by Harvard T.H. Chan School of Public Health.

The dysfunction identified—dysregulated hepatic coenzyme Q metabolism—leads to excessive reactive oxygen species (ROS) produced by mitochondria at a single specific site in an enzyme called complex I. The researchers say the discovery offers a potential path for new, precise treatments for metabolic diseases.

“Our findings provide the first step toward solving a complex problem in the field of metabolic disease research that has stood for three decades,” said corresponding author Gökhan S. Hotamisligil, James Stevens Simmons Professor of Genetics and Metabolism.

Envisioning a Future Where Wastewater Doesn’t Go to Waste

Wastewater generated by animal farms poses a significant environmental risk, as it can pollute soil and groundwater and can be hazardous to human health. However, animal farm wastewater also contains carbon and many other nutrients. What if we could extract the carbon and nutrients and then release treated water back into the environment?

That’s the future envisioned by Prathap Parameswaran, an associate professor at Kansas State University who researches how to use environmental biotechnology platforms for biological wastewater treatment and sustainable resource recovery.

ABPDU and Kansas State University researchers make progress on extracting useful products from animal farm wastewater.

You Don’t Need To Lose Weight To Get Healthier, Says Harvard Study

New research from Harvard T.H. Chan School of Public Health and Ben Gurion University in Israel reveals that nearly one-third of people who stuck to a healthy diet didn’t lose any weight, but still saw impressive health improvements.

Even without shedding pounds, participants experienced key benefits to their cardiometabolic health. These included higher levels of HDL cholesterol (often called the “good” cholesterol), reduced levels of leptin (a hormone that drives hunger), and less visceral fat, which is the deep belly fat that can surround vital organs.

“We have been conditioned to equate weight loss with health, and weight loss-resistant individuals are often labeled as failures,” said lead author Anat Yaskolka Meir, postdoctoral research fellow in the Department of Epidemiology at Harvard Chan School. “Our findings reframe how we define clinical success. People who do not lose weight can improve their metabolism and reduce their long-term risk for disease. That’s a message of hope, not failure.”

Excessive use of disinfectants in intensive care patients may raise risk of antibiotic-resistant infections

An international study has, for the first time, revealed a strong and direct link between the rise of antibiotic-resistant bacteria and universal disinfection procedures applied to patients in intensive care units. Published in The Lancet Microbe, the study calls for a reassessment of health care guidelines on the widespread use of disinfectants.

“Our research highlights the unintended consequences of universal decolonization in a global context where antibiotic resistance is an increasing threat,” says Marco Oggioni, professor at the Department of Pharmacy and Biotechnology at the University of Bologna and one of the study’s authors. “Coordinated efforts to prevent are crucial, but they must not prevent us from critically re-evaluating the tools we use to achieve these goals.”

Universal decolonization is a preventive procedure applied to patients upon admission to . The entire body is disinfected with chlorhexidine—a commonly used antiseptic also employed to sanitize and hospital surfaces—and an additional nasal treatment is administered with another disinfectant, mupirocin.

Stress genes clear dead cells, offering new disease insights

A new study from The University of Texas at Arlington details a novel strategy for how the body clears out dead cells during stress, revealing unexpected roles for well-known stress-response genes—a discovery that could help scientists better understand diseases affecting the immune system, brain and metabolism.

“The body is constantly creating new cells and removing old cells once they die,” said Aladin Elkhalil, lead author of the study and a third-year doctoral student in the lab of Piya Ghose, assistant professor of biology at UT Arlington. “This removal of is just as important as creating new ones, because if the body is unable to rid itself of dead cells, it can lead to various health problems”

Published in PLOS Genetics, the study was conducted on the roundworm C. elegans by Dr. Ghose, Elkhalil and Alec Whited, another graduate student in the Ghose lab. This tiny, transparent organism is a widely used tool in because its see-through body allows scientists to observe live cell behavior, including how cells die. The research team took advantage of these unique features in several innovative ways.

Scientists achieve shortest hard X-ray pulses to date

Once only a part of science fiction, lasers are now everyday objects used in research, health care and even just for fun. Previously available only in low-energy light, lasers are now available in wavelengths from microwaves through X-rays, opening a range of different downstream applications.

In a study published in Nature, an led by scientists at the University of Wisconsin–Madison has generated the shortest hard X-ray pulses to date through the first demonstration of strong lasing phenomena.

The resulting pulses can lead to several potential applications, from quantum X-ray optics to visualizing inside molecules.

Imaging-based STAMP technique democratizes single-cell RNA research

Scientists at St. Jude Children’s Research Hospital, the National Center for Genomic Analysis and the University of Adelaide have created a single-cell RNA analysis method that is 47 times cheaper and more scalable than other techniques.

Single-cell RNA sequencing provides scientists with important information about in health and disease. However, the technique is expensive and often prohibits analysis of large numbers of cells.

Scientists from St. Jude Children’s Research Hospital, the National Center for Genomic Analysis and the University of Adelaide have created a method that combines microscopy with single-cell RNA analysis to overcome these limitations. The technique called Single-Cell Transcriptomics Analysis and Multimodal Profiling through Imaging (STAMP) can look at millions of single cells for a fraction of the cost of existing approaches.

Tracing brain circuits that tell us when to eat—and when to stop

Scientists know the stomach talks to the brain, but two new studies from Rutgers Health researchers suggest the conversation is really a tug-of-war, with one side urging another bite, the other signaling “enough.”

Together, the papers in Nature Metabolism and Nature Communications trace the first complementary wiring diagram of hunger and satiety in ways that could refine today’s blockbuster weight-loss drugs and blunt their side effects.

One study, led by Zhiping Pang of Robert Wood Johnson Medical School’s Center for NeuroMetabolism, pinpointed a slender bundle of neurons that runs from the hypothalamus to the brainstem.

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