T cells

Fighting the Fungus Among Us

Overactive Immune Response Sets Stage for Infection

various fungi growing in a petri dish

Fungal infections are a serious medical threat to many people, especially those who are critically ill or have weakened immune systems. What’s more, outbreaks are on the rise, as studies show that rising global temperatures are causing fungi to evolve into new strains and grow in regions that were once too cold for comfort. Recent outbreaks include a tragic incident at a Michigan paper mill that sickened nearly 100 people and caused one death, as well as a cluster of fungal infections that have killed at least seven women who underwent cosmetic surgery at clinics in Mexico.

Commemorating Fungal Disease Awareness Week this week brings attention to the importance of combating fungal threats to our well-being. The theme this year is ‘Think Fungus,’ and that’s exactly what IRP senior investigator Michail Lionakis, M.D., Sc.D., has been doing for the last 20 years.

Dying Tumor Cells Suppress Anti-Cancer Immune Response

IRP Study Points to Strategies to Stop Disease From Spreading

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.

IRP’s Steven Rosenberg Receives HHS Secretary’s Award for Distinguished Service

Groundbreaking Immunotherapy Research Revolutionizes Cancer Treatment

Dr. Steven Rosenberg

Like many young boys, IRP senior investigator Steven A. Rosenberg, M.D., Ph.D., initially believed he would grow up to become a cowboy, a dream he shared with his older brother, Jerry. That plan changed after World War II ended and stories began coming out of Europe about members of his family who had perished in concentration camps.

“I just became so upset about the evil that people could perpetrate on one another,” he recalls. “Right then and there, I knew I wanted to do the opposite. I wanted to do things that would help people, and I developed almost a spiritual desire to become a doctor.”

He ultimately did become a doctor, and his pioneering research into how cancer interacts with the immune system has led to treatments that are reducing suffering for many people with cancer. In recognition of this groundbreaking work, Dr. Rosenberg was awarded the HHS Secretary’s Award for Distinguished Service in August 2021. The highest honor given by the US Department of Health and Human Services (HHS), the award celebrates excellence in leadership, ability, and service.

NIH Mourns the Passing of Thomas A. Waldmann

Dr. Thomas A. Waldmann

The NIH community is profoundly saddened by the recent passing of Thomas A. Waldmann, M.D., Chief Emeritus of the Lymphoid Malignancies Branch and NIH Distinguished Investigator.

Considered a giant in the field, Tom was a renowned immunologist whose more than 60-year career at the National Cancer Institute led to numerous high-impact discoveries that advanced the fields of organ transplantation, autoimmune disease and cancer. He was a leader in the study of cytokines and their receptors and of monoclonal antibodies, now a dominant form of cancer immunotherapy.

Study Identifies How Suppressed HIV Keeps Immune System on Edge

Findings Point to Approaches for Staving Off Health Problems in Infected Individuals

HIV-infected T cell

Over the four decades since it mysteriously began destroying the immune systems of Americans in New York and California, HIV has proven to be a frustratingly wily opponent for scientists. Even today, when treatments can fully suppress the virus in infected individuals, it continues to harm their health. A new IRP study has identified several ways dormant HIV might chronically stimulate the immune system, suggesting potential avenues for preventing the health problems that causes.

A Sweet Treatment for Diabetes

Sugar Molecule Protects Mice Against Type 1 Diabetes

a spoonful of sugar

Avoiding too much sugar is one of the cardinal rules for those who have or are at risk for diabetes. In fact, diabetes is characterized by having too much glucose, a form of sugar, in the blood. As a result, it came as quite a surprise to IRP researchers led by senior investigator Wanjun Chen, M.D., when they discovered that a particular form of sugar that they expected to have no effect on diabetes-prone mice actually protected them from developing type 1 diabetes.

Immune Cells Produce Potent Packages of Anti-Inflammatory Molecule

Experimental Treatment Curbs Autoimmune Eye Disease in Mice

B cell

Our cells produce a wide range of chemicals necessary for good health, but when they cannot manufacture enough of these substances, scientists can use cells cultivated in their labs to pick up the slack. In a promising example of this approach, IRP scientists stimulated lab-grown immune cells to produce tiny bundles of an important anti-inflammatory molecule and used those packages to successfully treat a potentially blinding autoimmune disease in mice.

Teaching an Old Vaccine New Tricks to Thwart Tuberculosis

The IRP’s Mario Roederer and Robert Seder Discuss the Science Behind the Headlines

Mycobacterium tuberculosis bacteria, the cause of tuberculosis

Some say that if something’s not broken, then don’t fix it, but that doesn’t mean there’s no room for improvement. At least, those were the thoughts of IRP senior investigators Mario Roederer, Ph.D., and Robert Alan Seder, M.D., who recently found that the century-old tuberculosis (TB) vaccine is far more effective when administered via injection into a vein (IV) rather than into the skin, which has long been the standard way it is given. This major breakthrough received extensive media coverage, including a story in the New York Times. We went Behind the Headlines to get the inside scoop on this potentially life-saving discovery.

Mouth Microbes Turn Treasonous in Gum Disease

Four Questions with Dr. Niki Moutsopoulos

bacteria

Our mouths are teeming with bacteria, a microbial ecosystem known as the oral microbiome. While these microbes are typically benign, under certain circumstances they can turn harmful and contribute to oral diseases such as periodontitis, a form of chronic gum disease characterized by microbe-driven inflammation of the soft tissues and bone that support our teeth. According to the Centers for Disease Control and Prevention (CDC), roughly 65 million Americans aged 30 or older have some degree of periodontitis. In its early stage, known as gingivitis, the gums become swollen and red due to inflammation, which is the body’s natural response to the presence of bacteria. If the condition worsens, it can lead to loose teeth and, eventually, bone or tooth loss.

NIH senior investigator Niki Moutsopoulos, Ph.D., head of the Oral Immunity and Inflammation Section at the National Institute of Dental and Craniofacial Research (NIDCR), studies periodontitis and aims to understand the immune system’s role in driving this destruction. In a 2018 study, she and her team of IRP researchers and outside collaborators discovered that an abnormal and unhealthy population of microbes in the mouth causes specialized immune cells, known as T helper 17 (Th17) cells, to trigger inflammation and destroy tissue, leading to periodontitis.

Poster Day Showcases Summer Student Science

Annual Event Shares Research by IRP’s Summer Interns

IRP summer intern Enat Ayele

NIH’s Natcher Conference Center was packed once again last Thursday for the annual Summer Poster Day. This year, more than 1,200 college and high school students spent their summer performing research in an IRP lab through the NIH’s Summer Internship Program. 

I navigated through the more than 900 posters presented this year to get a taste of the impressive work done by these young men and women in less than three months. If they can make these kinds of discoveries in just one summer, imagine what they might one day accomplish as full-time scientists and clinicians!