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Lurking dementia risk exposed by breakthrough test 25 years before symptoms
Study finds link between obesity and vascular dementia
Fox News senior medical analyst Dr. Marc Siegel joins ‘America’s Newsroom’ to discuss an increase in colon cancer in people under 50 despite an overall lowering cancer deaths and a new study linking obesity to vascular dementia.
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A new blood test could determine a woman’s dementia risk as early as 25 years before symptoms emerge.
That’s according to new research from the University of California San Diego, which found that a specific biomarker protein associated with early pathological processes of Alzheimer’s disease was “strongly linked” to future dementia risk.
The researchers analyzed blood samples from 2,766 participants in the Women’s Health Initiative Memory Study in the late 1990s, according to the study’s press release.
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The women ranged from 65 to 79 years of age and showed no signs of cognitive decline at the start of the study.
After tracking the participants for up to 25 years, the researchers concluded that the biomarker phosphorylated tau 217 (p-tau217) was “strongly associated” with future mild cognitive impairment and dementia.
A new blood test could determine a woman’s dementia risk as early as 25 years before symptoms emerge. (iStock)
Women who had higher levels of p-tau217 at the beginning of the study were “much more likely” to develop the disease. The findings were published today in JAMA Network Open.
“The key takeaway is that our study suggests it may be possible to detect risk of dementia two decades in advance using a simple blood test in older women,” first author Aladdin H. Shadyab, a UC San Diego associate professor of public health and medicine, told Fox News Digital.
“These biomarkers may help us identify who is at greatest risk and develop strategies to delay or prevent dementia.”
“Our findings show that the blood biomarker p-tau217 could help identify individuals at higher risk for dementia long before symptoms begin,” he added.
This long lead time could open the door to earlier prevention strategies and more targeted monitoring, rather than waiting until memory problems are already affecting daily life, according to Shadyab.
A specific biomarker protein associated with early pathological processes of Alzheimer’s disease was “strongly linked” to future dementia risk. (iStock)
“As the research advances, these biomarkers may help us identify who is at greatest risk and develop strategies to delay or prevent dementia,” he said.
This risk relationship wasn’t the same across the board, however. Women over 70 with higher p-tau217 levels had “poorer cognitive outcomes” compared to those under 70, as did those with the APOE ε4 gene, which is a known risk factor for Alzheimer’s disease.
The study also found that p-tau217 was a stronger predictor of dementia in women who were randomly assigned to receive estrogen and progestin hormone therapy compared to those who received a placebo.
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“Blood-based biomarkers like p-tau217 are especially promising because they are far less invasive and potentially more accessible than brain imaging or spinal fluid tests,” said senior author Linda K. McEvoy, senior investigator at Kaiser Permanente Washington Health Research Institute and professor emeritus at the Herbert Wertheim School of Public Health, in the release.
“Blood-based biomarkers like p-tau217 are especially promising because they are far less invasive and potentially more accessible than brain imaging or spinal fluid tests,” a researcher said. (iStock)
“This is important for accelerating research into the factors that affect the risk of dementia and for evaluating strategies that may reduce risk.”
Blood tests for Alzheimer’s disease are still being studied and are not recommended for routine screening in people without symptoms, Shadyab noted.
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More research is needed before this approach can be considered for clinical use prior to cognitive symptoms.
Future studies should investigate how other factors — like genetics, hormone therapy and age-related medical conditions — might interact with plasma p-tau217, the researchers added.
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“The study examined only older women, so the findings may not necessarily apply to men or younger populations,” Shadyab noted. “We also examined overall dementia outcomes rather than specific subtypes such as Alzheimer’s disease.”
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A new test could make it easier to detect high-risk prostate cancer cases earlier.
The blood test, called Stockholm3, is showing promise in clinical trials, beating out the traditional, standard prostate-specific antigen (PSA) test.
In a new study published in the Annals of Internal Medicine, researchers from the Karolinska Institutet in Sweden studied the test’s efficacy in more than 12,000 men — mostly Swedish or European — aged 50 to 74.
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All participants were tested with PSA and Stockholm3 and were followed for two years. During the follow-up period, 443 men were diagnosed with aggressive prostate cancer.
Stockholm3 detected 90% of aggressive prostate cancer cases compared to 74% for PSA tests.
Stockholm3 detected 90% of aggressive prostate cancer cases compared to 74% for PSA tests. (iStock)
Stockholm3 missed “significantly fewer” serious cancer cases than PSA. The number of men incorrectly classified as high-risk was similar across both tests, according to a press release.
Thorgerdur Palsdottir, a researcher at the Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, wrote in a statement that one of the major challenges in prostate cancer is being able to identify the cases that are “truly dangerous.”
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“Our results show that Stockholm3 identifies significantly more aggressive cancer cases than PSA without increasing the number of unnecessary follow-ups,” she said.
“These results point toward a potential change in how prostate cancer screening can be conducted,” the researcher added. “A more precise blood test could enable earlier detection of aggressive disease while reducing the number of unnecessary follow-up examinations and procedures.”
“A more precise blood test could enable earlier detection of aggressive disease while reducing the number of unnecessary follow-up examinations and procedures,” a researcher commented. (iStock)
Study co-author Hari Vigneswaran, chief medical officer of Stockholm3-maker A3P Biomedical, commented on these “promising” findings in an interview with Fox News Digital.
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He confirmed that the PSA has been the standard for prostate cancer screening since the 1990s despite its “well-documented limitations.”
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“It leads to invasive and costly follow-up testing, contributes to over-diagnosis of non-aggressive cancers and, most importantly, it misses a substantial share of aggressive disease,” Vigneswaran said.
When aggressive prostate cancer is found while still confined in the prostate, the five-year survival is close to 100%. (iStock)
When aggressive prostate cancer is found while still confined in the prostate, the five-year survival rate is close to 100%, which highlights the importance of early detection, according to the doctor.
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Data from the National Cancer Institute’s SEER database show that metastatic prostate cancer has risen over the past decade, suggesting that “we have not improved early detection of the aggressive, curable disease that screening is meant to catch,” Vigneswaran said.
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“The goal of screening is to find the cancers that need treatment while they are still curable, without raising the number of men who screen positive but don’t have aggressive disease,” he said.
Stockholm3 could reduce the need for unnecessary MRIs and biopsies, according to the researcher. (Getty Images)
Stockholm3 could reduce the need for unnecessary MRIs and biopsies, according to the researcher.
The findings did have some limitations. Stockholm3 is an investigational device and is not available for sale in the U.S., Vigneswaran noted.
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The test estimates a man’s risk of aggressive prostate cancer, but a biopsy remains the gold standard for confirming the disease.
The company plans to seek FDA approval to use the test for routine screening and will “generate the evidence needed to support that pathway, including U.S. data,” Vigneswaran said.
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Scientists have linked eating leafy green vegetables such as spinach, kale and broccoli to better lung health.
There are two primary forms of vitamin K found in foods. The primary kind is vitamin K1, found mainly in vegetables, which plays a major role in the body’s blood-clotting process.
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Vitamin K2 is found in fermented foods, certain dairy products, eggs and meats and helps regulate calcium in the body and supports bone health.
Researchers at Australia’s Edith Cowan University examined whether dietary intake of vitamins K1 and K2 was associated with chronic obstructive pulmonary disease (COPD), asthma and lung function.
Leafy green vegetables are high in vitamin K1, a nutrient that researchers have observed conributes to improved lung health. (iStock)
“Chronic respiratory diseases, including chronic obstructive pulmonary disease (COPD) and asthma, are among the most prevalent noncommunicable diseases worldwide and were the third leading cause of death in 2019, accounting for 4 million deaths and affecting 454.6 million individuals globally,” the scientists reported in the introduction to their study, published in The American Journal of Clinical Nutrition.
“Although asthma and COPD can be managed with available treatments, neither condition is curable, underscoring the need for effective prevention strategies,” they added.
The leading cause of COPD is smoking, the Mayo Clinic reported. Exposure to other irritants, such as dust, chemicals and pollution, can also cause it.
The researchers analyzed data from 179,062 participants over a 10-and-a-half-year period and concluded that, “Higher dietary vitamin K1 intake was associated with better lung function and a lower rate of COPD.”
Researchers found that people who increased their vitamin K1 intake were less likely to develop COPD. (iStock)
Participants who consumed the most vitamin K1 had a 16% lower likelihood of COPD, the researchers observed. The effects were more pronounced in smokers and participants with high-risk occupations.
Consumption of vitamin K2 did not result in lower COPD rates.
“No association was observed for vitamin K1 or vitamin K2 intakes and asthma,” the researchers also wrote.
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Associate Professor Marc Sim, who was involved in the study, said that it’s likely Vitamin K activates a protein that may help keep lung tissue flexible and prevent damage.
Because the study was observational, it cannot prove that vitamin K1 directly reduces COPD risk, only that higher intake was associated with better lung health.
Researchers have associated higher consumption of leafy green vegetables with better lung function. (iStock)
Just one extra serving of leafy greens “is an achievable way to boost your vitamin K1 intake,” said Chengfeng Li, one of the study’s researchers.
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Other foods rich in vitamin K1 include collard greens, Swiss chard, Brussels sprouts and turnip greens.
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