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Exposure to toxin increases colorectal cancer risk among younger adults, study finds

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Exposure to toxin increases colorectal cancer risk among younger adults, study finds

Amid the alarming trend of colorectal cancer cases rising among young people, a new study has pinpointed a potential source.

Researchers from University of California San Diego have linked a bacterial toxin called colibactin to the increase in early-onset cases.

Colibactin is produced by certain strains of Escherichia coli (E. coli) that exist in the colon and rectum, according to the researchers.

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Exposure to the bacterial toxin during early childhood can alter the DNA of colon cells in a way that increases the risk of developing colorectal cancer before age 50, the study found.

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In the study, the researchers analyzed 981 colorectal cancer genomes from early-onset and late-onset colorectal cancer patients across 11 countries.  (iStock)

The study, which was funded by Cancer Research UK, was published in the journal Nature on April 23.

“The key takeaway is that exposure to colibactin is likely a major contributor to early-onset colorectal cancer,” senior author Ludmil Alexandrov, professor in the Shu Chien-Gene Lay Department of Bioengineering and the Department of Cellular and Molecular Medicine at UC San Diego, told Fox News Digital.

“They could be decades ahead of schedule for developing colorectal cancer.”

In the study, the researchers analyzed 981 colorectal cancer genomes from early-onset and late-onset colorectal cancer patients across 11 countries. 

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Those who had prior exposure to colibactin were found to have specific mutations in their DNA, which have been shown to mainly occur in the first decade of life — “placing children on an accelerated path to developing cancer as young adults.”

Exposure to the bacterial toxin during early childhood can alter the DNA of colon cells in a way that increases the risk of developing colorectal cancer before age 50, the study found. (iStock)

That group was 3.3 times more likely to develop early-onset colorectal cancer compared to those who were diagnosed after 70.

These mutations were found to make up 15% of the early genetic alterations that increase colorectal cancer risk.

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“We detected the mutational signature of colibactin in over 50% of colorectal tumors from patients under 40, compared to less than 10% in tumors from older individuals,” Alexandrov noted.

“If someone acquires one of these driver mutations by the time they’re 10 years old, they could be decades ahead of schedule for developing colorectal cancer, getting it at age 40 instead of 60,” noted Alexandrov.

The fact that a microbial exposure in the first few years of life can leave a “lasting genomic imprint” and likely contribute to cancer in adulthood is both “remarkable and sobering,” according to the researcher. 

“It’s a reminder that there are likely many other such exposures we’ve yet to uncover, and that the way we nurture and protect children during these formative years may have long-term implications for their lifelong health,” he told Fox News Digital. 

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“From my perspective, investing in early-life prevention, healthy living and research is not just important — it’s essential.”

Dr. Emil Lou, MD, PhD, a board-certified oncologist and internal medicine physician at the University of Minnesota, agrees that the microbiome – “the constellation of microbes that includes bacteria that live under normal circumstances in our gut” — is one potential culprit of early-onset colorectal cancer.

“It is less surprising now than it was a decade ago that any form of bacteria – more specifically, a toxin derived from bacteria – could be associated with and potentially be the primary cause of cancer,” Lou, who was not involved in the study, told Fox News Digital. 

“What is especially concerning is the long period of time that might lapse between exposure to the bacteria early in life, and the time before the related cancer is diagnosed.”

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Potential limitations

Alexandrov pointed out that the study provides “strong genomic evidence” of a “striking association” between colibactin and early-onset colorectal cancer, but cannot prove causation. 

“Demonstrating unequivocal causality — proving that colibactin alone is sufficient to initiate cancer in humans — remains a significant challenge,” he told Fox News Digital.

Colorectal cancer cases have doubled among adults under 50 for each of the past two decades, statistics show. (iStock)

“Definitive proof of causality would require long-term prospective studies beginning in early childhood to monitor microbial colonization and track cancer development over several decades.”

Lou agreed with this limitation, noting the complexity of cancer factors.

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“There are many aspects of our environment – both within and outside of our bodies – that can play a role in development of cancer,” he said. “It is difficult to say or conclude whether any given single factor – in this case, the bacteria-derived toxin – is the true or even a major cause of colorectal cancer.”

“Providing evidence of potential association sets the foundation for more in-depth studies to determine whether there is true cause and effect,” Lou added.

“If current trends continue, colorectal cancer is projected to become the leading cause of cancer-related death among young adults by 2030.”

Alexandrov noted that while the findings don’t yet warrant changes to screening or treatment guidelines, they do highlight the “critical role of early-life microbial exposures” in terms of long-term cancer risk. 

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“We are actively working on developing screening tests to detect the long-term effects of colibactin exposure, with the goal of translating these findings into practical prevention strategies in the near future,” he added.

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Colorectal cancer cases have doubled among adults under 50 for each of the past two decades, statistics show.

“If current trends continue, colorectal cancer is projected to become the leading cause of cancer-related death among young adults by 2030,” the researchers concluded.

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Brain Health Challenge: Try the MIND Diet

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Brain Health Challenge: Try the MIND Diet

Welcome to Day 2 of the Brain Health Challenge. Today, we’re talking about food.

Your brain is an energy hog. Despite comprising about 2 percent of the average person’s body mass, it consumes roughly 20 percent of the body’s energy. In other words, what you use to fuel yourself matters for brain health.

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So what foods are best for your brain?

In a nine-year study of nearly 1,000 older adults, researchers at Rush University in Chicago found that people who ate more of nine particular types of food — berries, leafy greens, other vegetables, whole grains, beans, nuts, fish, poultry and olive oil — and who ate less red meat, butter and margarine, cheese, sweet treats and fried food had slower cognitive decline.

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Based on these findings, the researchers developed the MIND diet.

Large studies encompassing thousands of people have since shown that following the MIND diet corresponds with better cognitive functioning, a lower risk of dementia and slower disease progression in people with Alzheimer’s. People benefit from the diet regardless of whether they start it in midlife or late life.

Experts think the foods included in the MIND diet are especially good for the brain because they contain certain macro and micronutrients.

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Berries and leafy greens, for example, are rich in polyphenols and other antioxidants, said Jennifer Ventrelle, a dietitian at Rush and a co-author of “The Official Mind Diet.” Many of these compounds can cross the blood-brain barrier and help to fight inflammation and oxidative stress, both of which can damage cells and are linked to dementia.

Nuts and fatty fishes, like salmon and sardines, contain omega-3 fatty acids, which are important for building the insulating sheaths that surround the nerve fibers that carry information from one brain cell to another.

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Whole grains and beans both contain a hefty dose of fiber, which feeds the good microbes in the gut. Those microbes produce byproducts called short-chain fatty acids that experts think can influence brain health via the gut-brain axis.

You don’t have to revamp your whole diet to get these nutrients. Instead, think about “MIND-ifying” whatever you already tend to eat, said Dr. Joel Salinas, a neurologist at NYU Langone Health and the founder and chief medical officer of the telehealth platform Isaac Health. For instance, add a handful of nuts or berries to your breakfast.

Today’s activity will help you MIND-ify your own meals. Share your choices with your accountability partner and in the comments, and I’ll discuss the ways I’m adjusting my diet, too. For added inspiration, check out these MIND-approved recipes from New York Times Cooking.

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Measles outbreak explodes in South Carolina; multiple people hospitalized as cases surpass 200

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Measles outbreak explodes in South Carolina; multiple people hospitalized as cases surpass 200

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The South Carolina Department of Public Health (DPH) is sounding the alarm after 26 new measles cases were reported since Friday, bringing the total number of cases in the state’s latest outbreak to 211.

DPH first reported a measles outbreak Oct. 2 in the Upstate region. As of Tuesday, 144 people are in quarantine and seven people are in isolation.

Of the 211 cases, 45 involve children under 5, 143 cases involve children ages 5 to 17, 17 cases involve adults and six cases involve minors whose ages weren’t disclosed.

DPH said 196 of the 211 infected individuals were unvaccinated, four were partially vaccinated, one was vaccinated and 10 are either still being investigated or have an unknown vaccination status.

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Hundreds of people in South Carolina have contracted the measles, and a few have been hospitalized. (Jan Sonnenmair/Getty Images)

Officials said 19 of the new cases were associated with “exposures in known households and previously reported school exposures,” and four resulted from church exposures.

DPH identified public exposures at Sugar Ridge Elementary and Boiling Springs Elementary and began notifying potentially exposed students, faculty and staff Dec. 31. 

There are nine students in quarantine from the two schools.

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Of the 211 cases, 45 involve children under 5 years old. (iStock)

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Exposures also happened at the Tabernacle of Salvation Church, Unitarian Universalist Church of Spartanburg, Slavic Pentecostal Church of Spartanburg and Ark of Salvation Church.

The source of one case is unknown, while two others are still being investigated.

Although complications from measles are not reportable, officials said four people, including adults and children, required hospitalization for complications from the disease.

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Officials recommend all children be vaccinated against measles. (Raquel Natalicchio/Houston Chronicle via Getty Images)

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Additional cases required medical care, but the infected individuals were not hospitalized.

Those infected with measles are contagious from four days before the rash appears and may be unaware they can spread measles before they know they have the disease, according to DPH.

DPH said it is important for those with a mild illness or those who are in quarantine to stay home to protect others.

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“We encourage employers to support workers in following DPH recommendations to stay out of work while ill or in quarantine, which also protects businesses, other workers and clients,” officials wrote in a statement.

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DPH said vaccinations continue to be the best way to prevent measles and stop the outbreak.

Though the CDC recently released new vaccine recommendations under Health and Human Services Secretary Robert F. Kennedy Jr., its guidelines still dictate all children should be immunized for measles, mumps, rubella, polio, pertussis, tetanus, diphtheria, Haemophilus influenzae type B (Hib), pneumococcal disease, human papillomavirus (HPV) and chickenpox.

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Common pain relievers may raise heart disease and stroke risk, doctors warn

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Common pain relievers may raise heart disease and stroke risk, doctors warn

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Many might assume that over-the-counter (OTC) medications are generally safer than stronger prescription drugs, but research shows they can still present risks for some.

Certain common OTC painkillers have been linked to an increased risk of high blood pressure, stroke and heart attacks.

Potential risk of NSAIDs

Non-steroidal anti-inflammatory drugs (NSAIDs) — which are used to reduce pain, fever and inflammation — have been pinpointed as the class of medicines most linked to elevated cardiovascular risk.

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“This is because they reduce the production of certain chemicals called prostaglandins,” Maryam Jowza, M.D., an anesthesiologist at UNC Health in North Carolina, told Fox News Digital. “These chemicals are involved in inflammation, but they are also involved in other body functions, such as influencing the tone of blood vessels.”

Certain common OTC painkillers have been linked to an increased risk of high blood pressure, stroke and heart attacks. (iStock)

Dr. Marc Siegel, Fox News senior medical analyst, echoed the potential risk of NSAIDs. 

“They can lead to high blood pressure, heart attack and stroke via fluid retention and salt retention,” he told Fox News Digital. “This increases volume, puts a strain on the heart and raises blood pressure.”

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Common examples of NSAIDs include ibuprofen, naproxen, aspirin, diclofenac, indomethacin and celecoxib.

Randomized trials found that ibuprofen caused the biggest spikes in blood pressure, followed by naproxen and then celecoxib. 

“In general, the increase in blood pressure is more likely with higher doses and longer duration of treatment,” said Jowza, who is also an associate professor in the Department of Anesthesiology at the UNC School of Medicine.

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NSAIDs can also increase stroke risk, especially at high doses and with long-term use, the doctor added. 

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Diclofenac was linked to the highest cardiovascular risk, the doctor cautioned. Ibuprofen can also raise blood pressure and has been associated with a higher heart attack and stroke risk, but not as high as diclofenac. Naproxen carries a lower cardiovascular risk than ibuprofen or diclofenac, but is not entirely risk-free.

NSAIDs have been pinpointed as the class of medicines most linked to elevated cardiovascular risk. (iStock)

“The practical takeaway is that diclofenac is generally the least favorable choice in patients with elevated cardiovascular risk, and all NSAIDs should be used at the lowest effective dose for the shortest duration,” Dr. Nayan Patel, pharmacist and founder of Auro Wellness in Southern California, told Fox News Digital.

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Aspirin is an exception — although it is an NSAID, it actually reduces the risk of clots when taken at a low dose for prevention, under a doctor’s guidance. However, it can increase bleeding risk and blood pressure at high doses.

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Non-NSAIDs safer, but not risk-free

Non-NSAID pain relievers are commonly used for everyday aches, headaches and fever, but not swelling. They act mainly on the brain’s pain signals, not inflammation, according to medical experts.

Acetaminophen, the most common non-NSAID pain reliever, is also linked to an increase in blood pressure, although to a lesser extent, according to Jowza. 

“All NSAIDs should be used at the lowest effective dose for the shortest duration.”

“Acetaminophen was once thought to have little to no cardiovascular effects, but more recent evidence suggests it can increase blood pressure, especially with higher doses used in the long term,” she said, emphasizing the importance of blood pressure monitoring. “Its effect on stroke risk is less clear.”

Which groups are most vulnerable?

The groups at greatest risk, according to doctors, are those with existing health conditions, such as high blood pressure, prior stroke or heart disease, diabetes or kidney problems.

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“These groups are also more likely to experience NSAID-related fluid retention and destabilization of blood pressure control,” Patel said.

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Cardiovascular risk is generally higher for people 75 and older, the doctors agreed.

“Age amplifies risk largely because baseline cardiovascular risk increases with age, and kidney function reserve tends to decline,” Patel said. “Older adults are also more likely to be on antihypertensives, diuretics, antiplatelets or anticoagulants, so NSAIDs can destabilize blood pressure control and add safety complexity.”

Warning signs

Anyone experiencing chest pain, shortness of breath, sudden weakness or numbness, severe headache, confusion, slurred speech or vision changes should see a doctor immediately, Jowza advised.

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“These symptoms can point to a heart attack or stroke,” she warned. “Other symptoms of concern that may not develop as rapidly, like new swelling in the legs, should also prompt medical attention.”

Anyone experiencing chest pain, shortness of breath, sudden weakness or numbness, severe headache, confusion, slurred speech or vision changes should see a doctor immediately, a doctor advised. (iStock)

“Patients should also seek medical advice if they notice signs of fluid retention or kidney stress, such as rapidly rising blood pressure, swelling in the legs, sudden weight gain over a few days, reduced urine output or worsening shortness of breath,” Patel added.

Safer alternatives

For those at higher risk, Patel recommends non-NSAID approaches whenever possible. 

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“For many patients, this means starting with non-drug strategies such as heat or ice, physical therapy and activity modification,” he told Fox News Digital. “If medication is needed, acetaminophen is generally preferred over oral NSAIDs from a cardiovascular standpoint, although regular use should still be monitored in people with hypertension.”

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For localized joint or muscle pain, the doctor said topical NSAIDs can offer “meaningful relief” with “far lower” risk.

“Overall, pain management in high-risk patients should emphasize targeted therapy, conservative dosing and close blood pressure monitoring.”

Bottom line

The doctors emphasized that the overall risk is “very low” for people taking OTC pain relievers on a short-term basis, but it rises with long-term, high-dose use.

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“I would not hesitate to use an occasional dose if it were a low-risk individual with no prior history of heart attack or stroke,” Jowza said. “I also think short-term use in diabetics and hypertensives who are well-controlled is acceptable.”

Although aspirin is an NSAID, it actually reduces the risk of clots when taken at a low dose for prevention, under a doctor’s guidance. (iStock)

For those taking NSAIDs, the doctor suggested using “guard rails” — such as regularly testing blood pressure and kidney function, and setting limits on dosing — to make treatment as safe as possible.

Patel agreed that for most healthy individuals, occasional NSAID use “does not carry a meaningful cardiovascular risk.”

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“The concern is primarily with repeated or chronic use, higher doses, and use in people with underlying cardiovascular, kidney or blood pressure conditions,” he confirmed to Fox News Digital.

“That said, large population studies show that cardiovascular events can occur early after starting NSAIDs, particularly at higher doses, which is why even short-term use should be approached cautiously in higher-risk patients.”  

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