brain

Overturning the Orthodoxy About the Brain’s Stress Chemical

IRP Researchers Discover Unexpected Stress-Blunting Effects of Some Neurons

man showing signs of stress

The past few years have not been easy for anyone. With world events like the COVID-19 pandemic and the war in Ukraine causing everyone to worry, it’s no surprise that during this April’s annual Stress Awareness Month observance, so many people experienced high levels of stress and anxiety. While stress management techniques and talk therapy may help some people, nearly 10 million Americans need prescription anti-anxiety drugs to quell those feelings.

One important target for anti-anxiety medications is norepinephrine, a chemical released by certain neurons in the brain. Norepinephrine — also known as noradrenaline — has traditionally been considered to be a ‘stress chemical’ that triggers anxiety. However, drugs designed to target the neurons that produce it don’t always work as predicted. That’s why IRP senior investigator Patricia Jensen, Ph.D., and her colleagues in the Developmental Neurobiology Group at the National Institute of Environmental Health Sciences (NIEHS) are delving deep into the mouse brain to better understand these neurons and what exactly they do.

Mouse Study Supercharges Neurons to Detect Parkinson’s Disease

Pushing Cells to Their Limits Could Enable Earlier Diagnosis and Treatment

overloaded lightbulb

If the many stories of mothers lifting cars to save their trapped children prove anything, it’s that we cannot know the true capabilities of our bodies until they are put to the test. This concept, it turns out, could be the key to much earlier diagnosis for Parkinson’s disease. By stimulating specific neurons to push them to their limits, IRP researchers were able to detect Parkinson’s in mice in its very early stages, opening up the possibility that a similar test could one day allow human patients to begin treatment before the disease has caused too much damage.

An Unlikely Target in the Fight Against Alzheimer’s

IRP Researchers Find Link Between Dementia and Byproducts of Cholesterol Breakdown

old man in nursing home

When most people think about Alzheimer’s disease, the liver is probably the organ least likely to come to mind. Yet recent IRP research suggests that molecules called bile acids, which are synthesized in the liver, may influence the development of Alzheimer’s disease. In honor of Brain Awareness Week this week, we’re diving into that work to learn how such an unlikely target could help lead to new treatments for Alzheimer’s and other forms of dementia.

To date, efforts to develop therapies for Alzheimer’s disease, which affects more than 6 million Americans over the age of 65, have achieved little success. Many scientists are focused on proteins in the brain as potential treatment targets, including the ‘amyloid-beta’ protein now infamous amongst Alzheimer’s researchers. In contrast, IRP senior investigator Madhav Thambisetty, M.D., Ph.D., has been exploring the role that cholesterol might play in the development of Alzheimer’s and vascular dementia, which is marked by microscopic bleeding and blood vessel blockage and is the second most common form of dementia.

Graduate Student Symposium Spotlights Future Scientists

IRP’s Ph.D. and Medical Students Present Research at Virtual Event

Khiem Lam

The IRP isn’t concerned only with discovering the secrets of how our bodies work and developing new therapies to treat disease. Senior scientists and many other employees at NIH also are actively involved in training the next generation of researchers. One place where the benefits of those efforts is strikingly clear is at NIH’s annual Graduate Student Research Symposium, where graduate students performing research in NIH labs show of the fruits of their partnerships with IRP researchers.

On February 16 and 17, more than 100 of the IRP’s graduate students presented their work virtually at the 18th edition of the event. These young scientists discussed the results of studies on a huge range of topics, from how hunger changes during pregnancy to how viruses cause cancer. Read on to learn about a small sampling of the projects they’ve been hard at work on.

New Lasker Scholars Begin Breaking New Ground

Early-Career Scientists Power Through Pandemic to Launch Labs

NIH’s 2021 Lasker Clinical Research Scholars

NIH has long prided itself on its ability to accelerate the careers of the brightest young physicians and scientists in the country. One of these many efforts is the Lasker Clinical Research Scholars Program, which provides a select group of individuals relatively early in their scientific careers with the funding and institutional support to start their own labs at NIH. After five to seven years of independent research in the IRP, Lasker Scholars are given the option to apply for three years of funding for work outside of NIH or to remain as investigators at NIH.

While launching a lab in the midst of a global pandemic is no easy task, five Lasker Scholars have done just that over the past year. Their research on cancer, Parkinson’s disease, childhood blindness, and inflammatory conditions is now well underway and promises to eventually improve the lives of many patients. Keep reading to learn more about how NIH’s newest Lasker Scholars are changing the way we treat those illnesses.

Mouse Study Links Anxiety to Neuronal Power Failure

Chronic Stress Diminishes Energy Production in the Brain

unplugged power cord

When power lines come down and the electricity shuts off, it’s understandably a worrying situation. As it turns out, people may become anxious not just when their homes are cut off from energy, but also when their brains find themselves short on power, according to recent IRP research done in mice.

While the misfortune of a blackout is temporary, many people experience chronic stress that bothers them continuously. In some individuals, repetitive stressors can contribute to the development of debilitating anxiety that interferes with everyday life. Intriguingly, past research has found evidence that problems with the biological batteries that power our cells, called mitochondria, might be involved in anxiety disorders, as well as some other psychiatric illnesses.

To Boost Learning, Timing May Be Everything

New Strategy Could Enhance Benefits of Therapeutic Brain Stimulation

person holding a stopwatch

Electricity can do crazy things to the brain. While it can’t bring back the dead à la Frankenstein or give you new memories like in Total Recall, many scientists believe electrical stimulation could one day help patients with movement or memory problems regain those capabilities. New IRP research bolsters this idea by showing that a brain stimulation technology called transcranial magnetic stimulation (TMS) significantly boosts motor skill learning when precisely administered during specific periods of brain activity.

Wearable Tech Tracks Ebbs and Flows of Bipolar Disorder

Research Suggests Sleep- and Activity-Based Approaches to Treatment

women wearing a fitness tracker

Mental Illness Awareness Week, observed this year from October 3 through 9, brings attention and support to the many patients and families who are coping with a variety of psychological conditions. Although an estimated 20 percent of U.S. adults and nearly 17 percent of youth have some type of mental health ailment, these conditions are still not well understood. However, research conducted at the National Institute of Mental Health (NIMH) is transforming our knowledge of one such mental health condition that affects more than two million Americans: bipolar disorder.

NIH Summer Interns Show Off in Poster Exhibitions

Budding Scientists Present Their Research During Three-Day Virtual Event

Deeya Garg

Although NIH’s 2021 Summer Internship Program (SIP) was fully virtual this year, that didn’t stop the hundreds of participating high school, college, and graduate students from contributing to a variety of important IRP research projects. More than 500 students who worked in NIH labs this summer presented their work during this year’s Summer Presentation Week, which took place August 3-5.

I sifted through the lengthy list of presenters at the event and spoke with a diverse group of young men and women who spent their summers expanding our knowledge of human health and biology. Read on to learn about these promising future scientists and doctors and the research they completed this summer.

Tiny Molecules Have Big Potential for Treating Eye Diseases

Approach Could Protect or Even Regenerate Neurons in Eye and Spinal Cord

eye

At the end of Aesop’s fable The Lion and the Mouse, the titular rodent saves his much larger friend from a hunter’s trap. Just like Aesop, scientists know well that even something tiny and often overlooked can lend a helping hand. Extremely short strands of genetic material called microRNAs, for instance, could make for useful therapeutic targets for glaucoma and other degenerative eye ailments, according to new IRP research.