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I am Intramural Blog

immunology

From Friend to Foe: When the Immune System Turns on the Brain

IRP Research is Exploring the Role of Immune Cells in Dementia

Monday, November 4, 2024

illustration of fire trucks rushing to put out a fire in the brain

If you visit a lab at NIH’s Center for Alzheimer’s and Related Dementias (CARD), you may find yourself surrounded by several robots hard at work nurturing the hundreds of sets of genetically modified stem cells that CARD scientists use to study the illnesses that give CARD its name. Many of these cells will be coaxed to mature into the neurons that power our movements, thoughts, and memories — but not all of them. Neurons have long received the lion share of dementia researchers’ attention, understandable seeing as the visible symptoms of Alzheimer’s disease are closely linked to a build-up of proteins — amyloid-beta and misfolded tau — that damage neurons. However, neurons aren’t the only brain cells involved in dementia.

NIH Mourns the Passing of John Gallin

Thursday, October 17, 2024

Dr. John Gallin

NIH Director Monica M. Bertagnolli, M.D., offered the following tribute to Dr. John I. Gallin, M.D., upon hearing of his passing on Thursday, October 10, 2024.

It is with a heavy heart that I share that John I. Gallin, M.D., the 10th and longest-serving director of the NIH Clinical Center, died at his home today of multiple myeloma at the age of 81 with his wife Elaine Gallin, Ph.D., by his side.

John’s illustrious career at NIH spanned more than 50 years, but he will be most remembered for leading NIH’s research hospital for 23 years from 1994-2017. He often said that his time at the NIH Clinical Center, which he referred to as the “House of Hope,” was his most special because of the hospital’s partnership with patients to improve health through clinical research. He developed the hospital’s research portfolio, created the Patient Advisory Group, established the Department of Bioethics, and was instrumental in the creation of the Edmond J. Safra Family Lodge for adult patients and their families, a complement to The Children’s Inn. He also led efforts to build the addition to the hospital, the Mark O. Hatfield Clinical Research Center, which opened to patients in 2005. He started the Bench-to-Bedside Awards to integrate the work of basic and clinical investigators. His years of work led to the NIH Clinical Center receiving the 2011 Lasker-Bloomberg Public Service Award.

Synthetic Materials Influence Body’s Healing Response

Research Could Lead to New Strategies for Treating Injuries

Tuesday, January 9, 2024

doctor examining knee after surgery

Modern medical advances mean that many people are not “only flesh and blood.” Mechanical devices and substances created in medical labs are commonly replacing or being added to parts of people’s bodies. A new IRP study has shed light on how some of those materials might influence the body’s healing process, providing insights that could eventually spur the creation of new ones that influence the behavior of the body’s immune system and allow doctors to better direct how the body repairs itself.

Immune Cells’ Rallying Cry Negates Cardiovascular Surgery’s Benefits

Existing Medications Could Extend Procedure’s Protective Effects

Tuesday, September 26, 2023

surgeons performing surgery

While modern surgery is undoubtedly a life-saving modern marvel, mucking around inside the human body rarely comes without consequences. Certain life-extending procedures meant to combat heart disease, for instance, commonly cause cardiovascular complications of their own. Fortunately, a team led by IRP researchers has identified a promising approach for staving off those surgical side effects to keep patients’ hearts robust for longer.

Data Mining for Dementia Clues

IRP Research Examines Under-Appreciated Factors in Alzheimer’s Disease

Thursday, June 1, 2023

brain with red area in the middle representing inflammation

This June, the observance of Alzheimer’s and Brain Awareness month reminds us just how devastating the impact of Alzheimer’s and other dementias is across the world. About 55 million people are currently living with Alzheimer’s disease or related dementias such as frontotemporal dementia and Lewy body dementia. This includes the estimated 6.7 million people in the U.S. over age 65 with Alzheimer’s disease, a population whose cognitive decline imposes huge financial costs on the American economy and often unrecognized burdens on the unpaid family members who provide care for those patients.

While the disease has been a target of intensive investigation ever since Alois Alzheimer first discovered clumps of amyloid beta protein and tangles of tau in the brain of a deceased patient in 1906, scientists have made only modest progress in treating it. Efforts to design drugs targeting the abnormal globs of amyloid and tau thought to cause Alzheimer’s have met with only limited success. That’s why IRP investigator Keenan Walker, Ph.D., is taking a different approach: exploring the link between dementia risk and the immune system.

Digging Up the Roots of Food Allergies

IRP Research Aims to Explain the Perils of Peanuts and Other Foods

Wednesday, May 17, 2023

foods that can trigger food allergies, including shellfish, peanuts, and eggs

If you are a parent of school-age children, you’ve probably received a list of prohibited lunch foods and bans on birthday cupcakes. Going out to eat or cooking for guests can present a similar minefield of ingredients that many people must avoid. If it seems like food allergies are on the rise, it’s not your imagination. The U.S. Centers for Disease Control and Prevention (CDC) reports that the prevalence of food allergies has increased by 50 percent since the 1990s, making it a serious public health concern.

This May, Food Allergy Awareness Week reminds parents, kids, teachers, food service workers — really all of us — that we must remain vigilant to the risks of reactions to certain foods. These allergies affect nearly 32 million Americans, including 1 in 13 kids. If you think about the average classroom, that could be two or three children with severe allergies in one room. For many, even a tiny amount of an allergen can trigger a serious, even life-threatening response by the body’s immune system. To address this growing concern, IRP senior investigator Pamela A. Guerrerio, M.D., Ph.D., and her colleagues in the Food Allergy Research Section at the National Institute of Allergy and Infectious Diseases (NIAID) are working to unravel how genetics, immune system development, and environmental factors interact to cause food allergies in children.

Mapping the Pathway to an Asthma Attack

IRP Research Breathes New Life into Therapies for Treatment-Resistant Asthma

Tuesday, May 2, 2023

black man using an inhaler

It may start with a wheeze, a cough, or a feeling of tightness in the chest, but the result is the same. Acute asthma attacks make sufferers feel like they’re breathing through a straw while underwater. And even between attacks, having asthma can sometimes feel like your lungs are bound in tight bandages that make it difficult to take a deep breath.

World Asthma Day, observed this year on May 2, raises awareness of asthma, a common inflammatory disease that causes difficulty breathing in more than 260 million people worldwide, including 25 million in the U.S., roughly 8 percent of the country’s population. While many people can control their symptoms by taking medications and limiting certain activities, the condition still causes significant illness and even death.

Dying Tumor Cells Suppress Anti-Cancer Immune Response

IRP Study Points to Strategies to Stop Disease From Spreading

Tuesday, April 4, 2023

T cells (red) attacking cancer cell (white)

Ancient Greek myth describes how the hero Hercules battled the many-headed hydra, which regrew two heads every time Hercules cut one off. This frustrating fight against a seemingly invulnerable opponent would be an apt metaphor for treating cancer, in which tumor cells sometimes die in a particular way that actually helps their brethren multiply and spread to other parts of the body. In a study of that phenomenon using a mouse model of breast cancer, IRP researchers discovered that it occurs because that form of cell death suppresses the immune system’s response to the cancer, a finding that points to several potential ways to improve cancer therapy.

Postdoc Profile: Eavesdropping On Bacterial Banter

Dr. Tiffany Zarrella Examines Communication Between Bacteria to Combat Persistent Infections

Wednesday, October 12, 2022

Dr. Tiffany Zarella

Facebook’s nearly 3 billion users may seem like a huge social network, but it pales in comparison to the conversations among the trillions of microbes that live inside a single human body. Few people know this better than IRP postdoctoral fellow Tiffany Zarrella, Ph.D., who spends her days eavesdropping on the messages bacteria send to one another to improve treatment for stubborn infections.

Dr. Zarrella was drawn to the bacterial world in microbiology lab courses while earning a biochemistry degree at Syracuse University in New York. After graduation, she obtained a research technician position at Albany Medical College, where she worked on projects centered around infectious bacteria and how they respond to their environments. She continued this thread of research in graduate school, moving on to a new study to discover how Streptococcus pneumoniae bacteria, which often cause ear infections and pneumonia, use a particular signaling molecule to resist antibiotic treatments and evade vaccines.

Leading the Charge Against Infectious Disease

Government Awards Recognize H. Clifford Lane’s Four Decades of Research Achievements

Wednesday, July 27, 2022

Dr. H. Clifford Lane

The remarkable career of H. Clifford Lane, M.D., might have gone very differently if a NIH scientist hadn’t accidentally eavesdropped on Dr. Lane’s conversation with a colleague in 1979. After hearing Dr. Lane mention that he had missed the deadline to apply for a position at NIH, the NIH researcher made some calls and discovered a spot there had just opened up — one that was perfect for Dr. Lane, who would spend the ensuing decades conducting life-saving research to understand and combat some of the world’s most dangerous infectious diseases.

Now the Clinical Director at the National Institute for Allergy and Infectious Disease (NIAID), Dr. Lane has been named a finalist for the 2022 Samuel J. Heyman Service to America Medals’ Career Achievement Award in recognition of his crucial contributions to the fight against HIV/AIDS, Ebola, COVID-19, and other illnesses. Also known as the “Sammies,” the awards recognize federal employees who are “breaking down barriers, overcoming huge challenges, and getting results.”

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