Lifeboat Foundation

For decades, scientists have focused on how the brain processes information in a hierarchical manner, with different brain areas specialized for different tasks. However, how these areas communicate and integrate information to form a coherent whole has remained a mystery.

Now, researchers at University of California San Diego School of Medicine have brought us closer to solving it by observing how neurons synchronize across the human brain while reading. The findings are published in Nature Human Behavior and are also the basis of a thesis by UC San Diego School of Medicine doctoral candidate Jacob Garrett.

“How the activity of the brain relates to the subjective experience of consciousness is one of the fundamental unanswered questions in modern neuroscience,” said study senior author Eric Halgren, Ph.D., professor in the Departments of Neurosciences and Radiology at UC San Diego School of Medicine.

Aging is the major risk factor for the development of chronic diseases such as cardiovascular disease, cancer, diabetes, and dementia. Therefore, drugs that slow the aging process may help extend both lifespan and healthspan (the length of time that people are healthy).

In a study published online on February 29 in Medical Research Archives, Albert Einstein College of Medicine researchers evaluated U.S. Food and Drug Administration-approved drugs for their anti-aging potential. In ranking those drugs, they gave equal weight to preclinical studies (i.e., effect on rodent lifespan and healthspan) and clinical studies (i.e., reduced mortality from diseases the drugs were not intended to treat). The four therapeutics judged most promising for targeting aging were SGLT2 inhibitors, metformin, bisphosphonates, and GLP-1 receptor agonists. Since these drugs have been approved for safety and used extensively, the researchers recommend they be evaluated for their anti-aging potential in large-scale clinical trials.

The study’s corresponding author was Nir Barzilai, M.D., director of Einstein’s Institute for Aging Research, professor of medicine and of genetics and the Ingeborg and Ira Leon Rennert Chair in Aging Research at Einstein, and a member of the National Cancer Institute–designated Montefiore Einstein Comprehensive Cancer Center. The lead author was Michael Leone, a medical student at Einstein.

Researchers wish to probe whether consciousness has a basis in quantum mechanical phenomena.

By Hartmut Neven & Christof Koch

Since 2020, the condition known as long COVID-19 has become a widespread disability affecting the health and quality of life of millions of people across the globe and costing economies billions of dollars in reduced productivity of employees and an overall drop in the work force.

The intense scientific effort that long COVID sparked has resulted in more than 24,000 scientific publications, making it the most researched health condition in any four years of recorded human history.

Long COVID is a term that describes the constellation of long-term health effects caused by infection with the SARS-CoV-2 virus. These range from persistent respiratory symptoms, such as shortness of breath, to debilitating fatigue or brain fog that limits people’s ability to work, and conditions such as heart failure and diabetes, which are known to last a lifetime.

Researchers have discovered a brain-gut circuit that links stress to changes in gut bacteria, revealing that emotional states can directly influence immune function through the duodenal glands.

Scientists looking to tackle our ongoing obesity crisis have made an important discovery: Intermittent calorie restriction leads to significant changes both in the gut and the brain, which may open up new options for maintaining a healthy weight.

Researchers from China studied 25 volunteers classed as obese over a period of 62 days, during which they took part in an intermittent energy restriction (IER) program – a regime that involves careful control of calorie intake and relative fasting on some days.

Not only did the participants in the study lose weight – 7.6 kilograms (16.8 pounds) or 7.8 percent of their body weight on average – there was also evidence of shifts in the activity of obesity-related regions of the brain, and in the make-up of gut bacteria.

A team led by UT Southwestern Medical Center researchers has discovered a new way that cells regulate senescence, an irreversible end to cell division. The findings, published in Cell, could one day lead to new interventions for a variety of conditions associated with aging, including neurodegenerative and cardiovascular diseases, diabetes, and cancer, as well as new therapies for a collection of diseases known as ribosomopathies.

“There is great interest in reducing senescence to slow or reverse aging or aging-associated diseases. We discovered a noncoding RNA that when inhibited strongly impairs senescence, suggesting that it could be a therapeutic target for conditions associated with aging,” said Joshua Mendell, M.D., Ph.D., Professor of Molecular Biology and a member of the Harold C. Simmons Comprehensive Cancer Center at UT Southwestern. He is also a Howard Hughes Medical Institute Investigator.

Dr. Mendell led the study with co-first authors Yujing Cheng, Ph.D., a recent graduate of the Genetics, Development, and Disease graduate program; and Siwen Wang, M.D., a former postdoctoral researcher, both in the Mendell Lab.

Then I Am Myself the World Christof Koch Basic Books, $30

The human brain is the most complex information integrator known in the universe. With 86 billion neurons and 100 trillion connections between them, the brain gives us our rich subjective experiences and our capacity for free will — our consciousness.

Despite being a universal human phenomenon, consciousness is notoriously difficult to describe, and scientists still debate how it arises. In Then I Am Myself the World, neuroscientist Christof Koch offers the latest entry into the long list of books attempting to demystify the origins of our inner lives (SN: 1/5/22). While the topic can be a head-scratcher, Koch’s adept use of analogies and entertaining anecdotes — complete with his own near-death experience and psychedelic drug trips — make the book a compelling and surprisingly light read.

Google scientists have modelled a fragment of the human brain at nanoscale resolution, revealing cells with previously undiscovered features.