Research advances from the National Institutes of Health (NIH) Intramural Research Program (IRP) often make headlines. Read the news releases that describe our most recent findings:
BETHESDA, Md. (AP) — Sam Srisatta, a 20-year-old Florida college student, spent a month living inside a government hospital here last fall, playing video games and allowing scientists to document every morsel of food that went into his mouth.
From big bowls of salad to platters of meatballs and spaghetti sauce, Srisatta noshed his way through a nutrition study aimed at understanding the health effects of ultraprocessed foods, the controversial fare that now accounts for more than 70% of the U.S. food supply. He allowed The Associated Press to tag along for a day.
“Today my lunch was chicken nuggets, some chips, some ketchup,” said Srisatta, one of three dozen participants paid $5,000 each to devote 28 days of their lives to science. “It was pretty fulfilling.”
Examining exactly what made those nuggets so satisfying is the goal of the widely anticipated research led by National Institutes of Health nutrition researcher Kevin Hall.
“What we hope to do is figure out what those mechanisms are so that we can better understand that process,” Hall said.
Findings could pave the way for more personalized treatments for cardiovascular disease
National Institute of Health (NIH) scientists have made a significant breakthrough in understanding how "bad" cholesterol, known as low-density lipoprotein-cholesterol or LDL-C, builds up in the body. The researchers were able to show for the first time how the main structural protein of LDL binds to its receptor – a process that starts the clearing of LDL from the blood – and what happens when that process gets impaired.
The findings, published in Nature, further the understanding of how LDL contributes to heart disease, the world’s leading cause of death, and could open the door to personalizing LDL-lowering treatments like statins to make them even more effective.
“LDL is one of the main drivers of cardiovascular disease which kills one person every 33 seconds, so if you want to understand your enemy, you want to know what it looks like,” said Alan Remaley, M.D., Ph.D., co-senior author on the study who runs the Lipoprotein Metabolism Laboratory at NIH’s National Heart, Lung, and Blood Institute.
NIH modeling study looked at the individual and combined impacts of cancer prevention, screening, and treatment
Improvements in cancer prevention and screening have averted more deaths from five cancer types combined over the past 45 years than treatment advances, according to a modeling study led by researchers at the National Institutes of Health (NIH). The study, published Dec. 5, 2024, in JAMA Oncology, looked at deaths from breast, cervical, colorectal, lung, and prostate cancer that were averted by the combination of prevention, screening, and treatment advances. The researchers focused on these five cancers because they are among the most common causes of cancer deaths and strategies exist for their prevention, early detection, and/or treatment. In recent years, these five cancers have made up nearly half of all new cancer diagnoses and deaths.
"Although many people may believe that treatment advances are the major driver of reductions in mortality from these five cancers combined, the surprise here is how much prevention and screening contribute to reductions in mortality," said co-lead investigator Katrina A. B. Goddard, Ph.D., director of NCI’s Division of Cancer Control and Population Sciences. “Eight out of 10 deaths from these five cancers that were averted over the past 45 years were due to advances in prevention and screening.”
A single prevention intervention, smoking cessation, contributed the lion’s share of the deaths averted: 3.45 million from lung cancer alone. When considering each cancer site individually, prevention and screening accounted for most deaths averted for cervical, colorectal, lung, and prostate cancer, whereas treatment advances accounted for most deaths averted from breast cancer.
NIH study finds some abnormal results due to colorectal, breast, lung and pancreatic cancers
Researchers at the National Institutes of Health (NIH) found previously undetected cancers in 48.6% of pregnant people who had abnormal results for prenatal cell-free DNA (cfDNA) testing used to screen for chromosomal disorders in the fetus. Cancers included colorectal, breast, lung and pancreatic cancers, as well as lymphoma, cholangiocarcinoma and renal carcinoma. The screening test analyzes placental DNA fragments circulating in the maternal bloodstream to identify an extra chromosome or to determine the baby’s sex. The study appears in the New England Journal of Medicine.
In addition to fetal DNA, cfDNA testing detects DNA released from the mother’s red blood stem cells and, occasionally, abnormal DNA that may result from an undetected cancer in the asymptomatic pregnant person. NIH’s ongoing IDENTIFY study seeks to learn more about abnormal cfDNA test results that could indicate potential cancers. For the current analysis, researchers performed cancer screening of 107 IDENTIFY participants using whole body magnetic resonance imaging (MRI), standard medical diagnostic tests, and cfDNA sequencing. A total of 52 participants were diagnosed with cancer. For this group, the authors found that whole body MRI was the most effective method for detecting cancer. Standard diagnostic techniques, such as taking a medical history, assessing symptoms, and physical examination, were of limited use in identifying a participant’s cancer or its location.
Other abnormal cfDNA results were attributed to fibroids (benign uterine tumors), placental chromosomes that differed from fetal chromosomes, and clonal hematopoiesis in the mother (a precancerous state that can lead to blood cancers). The researchers noted the need for additional studies to validate cfDNA sequencing patterns described by the investigators that could indicate cancer in this young, pregnant population without obvious clinical symptoms.
Such an algorithm may save clinicians time and accelerate clinical enrollment and research
Researchers from the National Institutes of Health (NIH) have developed an artificial intelligence (AI) algorithm to help speed up the process of matching potential volunteers to relevant clinical research trials listed on ClinicalTrials.gov. A study published in Nature Communications found that the AI algorithm, called TrialGPT, could successfully identify relevant clinical trials for which a person is eligible and provide a summary that clearly explains how that person meets the criteria for study enrollment. The researchers concluded that this tool could help clinicians navigate the vast and ever-changing range of clinical trials available to their patients, which may lead to improved clinical trial enrollment and faster progress in medical research.
A team of researchers from NIH’s National Library of Medicine (NLM) and National Cancer Institute harnessed the power of large language models (LLMs) to develop an innovative framework for TrialGPT to streamline the clinical trial matching process. TrialGPT first processes a patient summary, which contains relevant medical and demographic information. The algorithm then identifies relevant clinical trials from ClinicalTrials.gov for which a patient is eligible and excludes trials for which they are ineligible. TrialGPT then explains how the person meets the study enrollment criteria. The final output is an annotated list of clinical trials—ranked by relevance and eligibility—that clinicians can use to discuss clinical trial opportunities with their patient.
“Machine learning and AI technology have held promise in matching patients with clinical trials, but their practical application across diverse populations still needed exploration,” said NLM Acting Director, Stephen Sherry, PhD. “This study shows we can responsibly leverage AI technology so physicians can connect their patients to a relevant clinical trial that may be of interest to them with even more speed and efficiency.”
Findings could point to new ways to treat RAS-driven cancers
Researchers at the National Institutes of Health (NIH) and their collaborators have discovered a new way in which RAS genes, which are commonly mutated in cancer, may drive tumor growth beyond their well-known role in signaling at the cell surface. Mutant RAS, they found, helps to kick off a series of events involving the transport of specific nuclear proteins that lead to uncontrolled tumor growth, according to a study published Nov. 11, 2024, in Nature Cancer.
RAS genes are the second most frequently mutated genes in cancer, and mutant RAS proteins are key drivers of some of the deadliest cancers, including nearly all pancreatic cancers, half of colorectal cancers, and one-third of lung cancers. Decades of research have shown that mutant RAS proteins promote the development and growth of tumors by activating specific proteins at the cell surface, creating a constant stream of signals telling cells to grow.
“This is the first study to show that mutated RAS genes can promote cancer in an entirely new way,” said study author Douglas Lowy, M.D., deputy director of NIH’s National Cancer Institute (NCI). “The finding of the additional role for RAS proteins has exciting implications for improving treatment.”
Mutant RAS helps release EZH2 from a protein complex transported from the nucleus to the cytoplasm. Once released, EZH2 facilitates the breakdown of the DLC1 tumor suppressor protein, leading to uncontrolled tumor growth. Image created with BioRender.
A study from researchers at National Institutes of Health (NIH) and their collaborators revealed a significant genetic risk factor for kidney disease in people from Ghana and Nigeria. Their study demonstrated that having just one risk variant in a gene known as APOL1 can significantly increase the risk of developing kidney disease. APOL1 is important for the immune system and variants of the gene are linked to increased risk of chronic kidney disease. The study is published in the New England Journal of Medicine and was conducted by researchers from the Human Heredity and Health in Africa (H3Africa) Kidney Disease Research Network.
Previous research established that genomic variants in APOL1 increase the risk of developing chronic kidney disease among African Americans. However, not much is known about how these genomic variants affect people from West African countries, where many African Americans derive genetic ancestry. Studying how these genomic variants contribute to chronic kidney disease in West Africans and people with West African ancestry can also help inform the risk of kidney disease in many Americans.
“Our study provides data about West Africans that will help us better understand the risk of chronic kidney disease associated with APOL1 variants,” said Adebowale A. Adeyemo, M.B.B.S., who is a co-author of the study and is the deputy director and chief scientific officer of the Center for Research on Genomics and Global Health at NIH’s National Human Genome Research Institute (NHGRI). “By comparing this study to previous studies involving the African American population, we can gain a deeper understanding of the effects of these high risk APOL1 variants. Knowing your genetic risk for a disease, such as kidney disease, can help you make more informed decisions about your health and potentially lead to earlier interventions.”
Previous research established that genomic variants in APOL1 increase the risk of developing chronic kidney disease among African Americans.
NIH-supported findings pave the way for genetic testing, clinical trials, and therapy development
Scientists at the National Institutes of Health (NIH) and their colleagues have identified a gene responsible for some inherited retinal diseases (IRDs), which are a group of disorders that damage the eye’s light-sensing retina and threatens vision. Though IRDs affect more than 2 million people worldwide, each individual disease is rare, complicating efforts to identify enough people to study and conduct clinical trials to develop treatment. The study’s findings published today in JAMA Ophthalmology.
In a small study of six unrelated participants, researchers linked the gene UBAP1L to different forms of retinal dystrophies, with issues affecting the macula, the part of the eye used for central vision such as for reading (maculopathy), issues affecting the cone cells that enable color vision (cone dystrophy) or a disorder that also affects the rod cells that enable night vision (cone-rod dystrophy). The patients had symptoms of retinal dystrophy starting in early adulthood, progressing to severe vision loss by late adulthood.
“The patients in this study showed symptoms and features similar to other IRDs, but the cause of their condition was uncertain,” said Bin Guan, Ph.D., chief of the Ophthalmic Genomics Laboratory at NIH’s National Eye Institute (NEI) and a senior author of the report. “Now that we’ve identified the causative gene, we can study how the gene defect causes disease and, hopefully, develop treatment.”
Ophthalmic images from the study probands exhibit variable forms of retinal dystrophy.
NIH findings highlight critical gaps in treatment access in correctional facilities, where almost two-thirds of people have a substance use disorder
A new look into addiction treatment availability in the U.S. criminal justice system reveals that fewer than half (43.8%) of 1,028 jails surveyed across the nation offered any form of medication for opioid use disorder, and only 12.8% made these available to anyone with the disorder. With two-thirds of people who are incarcerated in U.S. jails experiencing a substance use disorder — in many cases, an opioid use disorder — the failure to make these medications widely available in criminal justice settings represents a significant missed opportunity to provide life-saving treatments in an environment where people in need of care can be easily reached.
The study, published in JAMA Network Open and supported by NIH’s National Institute on Drug Abuse (NIDA), also found that most jails did offer some type of substance use disorder treatment or recovery support (70.1%). The most common reason jails cited for not offering medications for opioid use disorder was lack of adequate licensed staff (indicated by 49.8% of jails). In general, larger jails, those in counties with lower 'social vulnerability' (lower levels of poverty and unemployment, and greater education, housing, and transportation access), and those with greater proximity to community-based providers of medications for opioid use disorder were more likely to offer these treatments.
“Offering substance use disorder treatment in justice settings helps to break the debilitating — and often fatal — cycle of addiction and incarceration,” said NIDA Director Nora D. Volkow, M.D. “Though someone may be in jail for only a short time, connecting them to addiction treatment while they are there is critical to reduce risk of relapse and overdose, and to help them achieve long-term recovery.”
Cancer incidence trends in 2021 largely returned to what they were before the COVID-19 pandemic, according to a study by researchers at the National Institutes of Health (NIH). However, there was little evidence of a rebound in incidence that would account for the decline in diagnoses in 2020, when screening and other medical care was disrupted. One exception was breast cancer, where the researchers did see an uptick in diagnoses of advanced-stage disease in 2021. The study appears Sept. 24, 2024, in the Journal of the National Cancer Institute.
A previous study showed that new cancer diagnoses fell abruptly in early 2020, as did the volume of pathology reports, suggesting that many cancers were not being diagnosed in a timely manner. To determine whether these missed diagnoses were caught in 2021, possibly as more advanced cancers, researchers from NIH’s National Cancer Institute (NCI) compared observed cancer incidence rates for 2021 with those expected from pre-pandemic trends using data from NCI’s Surveillance, Epidemiology, and End Results Program.
A full recovery in cancer incidence should appear as an increase over pre-pandemic levels (also known as a rebound) to account for the missed diagnoses. The researchers looked at cancer overall, as well as five major cancer types that vary in how they are typically detected: through screening (female breast and prostate cancer), due to symptoms (lung and bronchus and pancreatic cancer), or incidentally during other medical procedures (thyroid cancer).
Findings in animals suggest a surgery-free treatment for cataracts
Researchers at the National Institutes of Health (NIH) and their collaborators have identified a protein, known as RNF114, that reverses cataracts, a clouding of the eye’s lens that occurs commonly in people as they age. The study, which was conducted in the 13-lined ground squirrel and rats, may represent a possible surgery-free strategy for managing cataracts, a common cause of vision loss. The study published in the Journal of Clinical Investigation.
“Scientists have long searched for an alternative to cataract surgery, which is effective, but not without risk. Lack of access to cataract surgery is a barrier to care in some parts of the world, causing untreated cataracts to be a leading cause of blindness worldwide,” said Xingchao Shentu, M.D., a cataract surgeon and the co-lead investigator from Zhejiang University, China.
This new discovery was part of ongoing research at NIH’s National Eye Institute (NEI) involving a mammalian hibernator, the 13-lined ground squirrel. In these ground squirrels, the light-sensitive photoreceptor cells in the retina are mostly cones, which makes the ground squirrel helpful for studying cone-related properties, such as color vision. In addition, the squirrel’s ability to withstand months of cold and metabolic stress during hibernation make it model for vision scientists to study a range of eye diseases.
