Health
Experimental vaccine for common cancer shows potential in clinical trial
A vaccine for pancreatic cancer could serve as a promising new therapy.
At Memorial Sloan Kettering Cancer Center (MSK) in New York, an experimental approach to treating the cancer with a messenger RNA (mRNA)-based therapeutic vaccine “continues to show potential” in reducing the risk of the disease returning after surgery, according to a press release.
Results from the phase 1 clinical trial, published in the journal Nature, revealed that the vaccine triggered an immune response in a small patient group.
CANCER VACCINE SHOWS PROMISING RESULTS FOR CERTAIN PATIENTS
This immune-cell activation persisted for nearly four years after treatment, the release stated.
Patients who received the vaccine and showed an immune system response were more likely to remain cancer-free by their three-year follow-up.
Results from the phase 1 clinical trial “continue to show potential,” MSK reported in a press release. (iStock)
Vinod Balachandran, MD, principal investigator of the trial and senior study author at MSK, stated his optimism about the efficacy of this treatment.
“We find that with RNA vaccine technology, we can teach the immune system to recognize pancreatic cancer, and this immune response could potentially last for many years,” he said.
“The ability to trigger a robust, long-lasting immune response is a requisite feature for any cancer vaccine.”
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As pancreatic cancer is “difficult to treat,” Balachandran shared his surprise that the immune system responded in some patients.
“We are encouraged to see that our approach can teach the immune system to recognize pancreatic cancer, that the immune response is potent and that it may potentially impact patients,” he said.
“The ability to trigger a robust, long-lasting immune response is a requisite feature for any cancer vaccine.”
“Although the findings are promising, these vaccines are still in the early stages of testing,” Balachandran said.
The team is planning a larger study “to further test these therapeutic cancer vaccines in patients with surgically removable pancreatic cancer.”
Therapeutic vaccines target early stages of cancer, where tumors can be surgically removed and haven’t spread. (iStock)
Of the 16 participants, the vaccine stimulated an immune response in half of them. The cancer vaccine was personalized for each participant to target specific proteins found in their form of the disease.
The patients also received an immunotherapy drug (atezolizumab) and standard-of-care chemotherapy after receiving surgery.
Therapeutic cancer vaccines like this one, referred to as autogene cevumeran, are meant to treat the cancer instead of preventing it, by training the immune system to “recognize cancer cells as foreign,” according to the researchers.
Patients who had an immune response to the vaccine were more likely to have reduced cancer risk by their three-year check-up. (iStock)
The vaccine is meant to target early stages of cancer that have not spread, where tumors can be surgically removed, to “help delay or prevent recurrence.”
Balachandran noted that this approach could potentially be applied to other forms of cancer as well.
“If you can do this in pancreatic cancer, theoretically you may be able to develop therapeutic vaccines for other cancer types.”
“For patients with pancreatic cancer, our latest results continue to support the approach of using personalized mRNA vaccines to target neoantigens in each patient’s tumor,” he said.
“If you can do this in pancreatic cancer, theoretically you may be able to develop therapeutic vaccines for other cancer types.”
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Pancreatic cancer remains one of the deadliest cancers, as only about 13% of patients are alive five years following diagnosis, according to MSK and the American Cancer Society.
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Common therapies like chemotherapy, radiation and immunotherapies are “largely ineffective” against pancreatic cancer, MSK stated, which makes new therapies “urgently needed.”
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Eating too much salt has long been linked to high blood pressure, but new research suggests it could trick the immune system into prematurely aging the blood vessels.
A preclinical study recently published in the Journal of the American Heart Association has identified a biological chain reaction that links a salty diet to cardiovascular decay.
Scientists at the University of South Alabama observed that mice on a high-salt diet experienced rapid deterioration in their blood vessel function.
HIGH SALT INTAKE LINKED TO FASTER MEMORY DECLINE IN ONE GROUP, STUDY FINDS
After just four weeks of high sodium intake, the small arteries responsible for regulating blood flow lost their ability to relax, according to a press release.
The team found that the cells lining these vessels had entered a state of cellular senescence, a form of premature cellular aging in which cells stop dividing and release a mix of inflammatory signals that can damage surrounding tissue.
Excess salt has long been linked to high blood pressure, but a new study goes deeper into its effects on the cardiovascular system. (iStock)
The researchers tried to replicate this damage by exposing blood vessel cells directly to salt in a laboratory dish, but the cells showed no harmful effects.
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This suggests that salt isn’t directly causing damage to the vascular lining but that the real culprit may be the body’s own defense mechanism, the researchers noted.
Excess salt may trigger the immune system to release a molecule called interleukin-16 (IL-16), which acts as a messenger that instructs blood vessel cells to grow old before their time, according to the study.
Excess salt may trigger the immune system to release a molecule called interleukin-16, which acts as a messenger that instructs blood vessel cells to grow old before their time, according to the study. (iStock)
Once these cells age, they fail to produce nitric oxide, the essential gas that tells arteries to dilate and stay flexible.
To test whether this process could be reversed, the team turned to a class of experimental drugs known as senolytics.
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Using a cancer medication called navitoclax, which selectively clears out aged and dysfunctional cells, the researchers were able to restore nearly normal blood vessel function in the salt-fed mice, the release stated.
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By removing the decaying cells created by the high-salt diet, the drug allowed the remaining healthy tissue to maintain its elasticity and respond correctly to blood flow demands.
Excess salt may trigger the immune system into stopping the cells from dividing, the study suggests. (iStock)
The study did have some limitations. The transition from mouse models to human treatment remains a significant hurdle, the team cautioned.
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Senolytic drugs like navitoclax are still being studied for safety, and the team emphasized that previous trials have shown mixed results regarding their impact on artery plaque.
Additionally, the researchers have not yet confirmed whether the same IL-16 pathway is the primary driver of vascular aging in humans.
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Eating a diet high in fruits and vegetables was found to have a surprising link to lung cancer among younger non-smokers, early research suggests.
The observational study, led by Jorge Nieva, M.D., of the USC Norris Comprehensive Cancer Center at Keck Medicine, was presented this month at the American Association for Cancer Research (AACR) annual meeting in San Diego. It has not yet been peer-reviewed.
Researchers looked at dietary, smoking and demographic data for 187 patients who were diagnosed with lung cancer at age 50 or younger.
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They found that among non-smokers, there was a link between healthier-than-average diets – rich in fruits, vegetables and whole grains – and the chance of lung cancer development.
Young lung cancer patients ate more servings of dark green vegetables, legumes and whole grains compared to the average U.S. adult, the researchers found.
Eating a diet high in fruits and vegetables was found to have a surprising link to lung cancer among younger non-smokers, early research suggests. (iStock)
The researchers hypothesized that pesticides applied to conventionally grown produce could be a possible factor in the disease association.
“Commercially produced (non-organic) fruits, vegetables and whole grains are more likely to be associated with a higher residue of pesticides than dairy, meat and many processed foods,” according to Nieva. He also noted that agricultural workers exposed to pesticides tend to have higher rates of lung cancer.
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“There is a large subset of lung cancer patients whose disease is not caused by smoking,” Nieva told Fox News Digital.
The disease is becoming more common in non-smokers 50 and younger, especially women – despite the fact that smoking rates have been falling for decades, the researcher noted.
The researchers hypothesized that pesticides applied to conventionally grown produce could be a possible factor in the disease association. (iStock)
“These patients tend to have eaten much healthier diets before their diagnosis than the average American,” he went on. “We need to support research into understanding why Americans – and women in particular – who no longer smoke very much are still having lung cancer,” he said.
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The study did have some limitations, Nieva acknowledged, primarily that it relied on survey data and was limited by the participants’ memories of their food intake.
“Also, the survey participants were self-selected, and this could have biased the findings,” he told Fox News Digital.
“There is a large subset of lung cancer patients whose disease is not caused by smoking.”
The researchers did not test specific foods for pesticides, relying instead on average pesticide levels for certain types of food. Looking ahead, they plan to test patients’ blood and urine samples to directly measure pesticide levels, Nieva said.
Although the study shows only an association and does not prove that pesticides caused lung cancer, Nieva recommends that people wash their produce before eating and choose organic foods whenever possible.
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“This work represents a critical step toward identifying modifiable environmental factors that may contribute to lung cancer in young adults,” said Nieva. “Our hope is that these insights can guide both public health recommendations and future investigation into lung cancer prevention.”
“It is possible that the increased lung cancer risk could be due to pesticide exposure in whole farmed foods, but is by no means certain,” a doctor said. (AP Photo/Charlie Neibergall)
Dr. Marc Siegel, Fox News senior medical analyst, said the study is “interesting,” but that it “raises far more questions than it answers.”
“It is a small study (around 150) and observational, so no proof,” the doctor, who was not involved in the research, told Fox News Digital.
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“It is possible that the increased lung cancer risk could be due to pesticide exposure in whole farmed foods, but it is by no means certain,” Siegel went on. “How much exposure is needed? How much of it gets into food and in which areas? This requires much further study.”
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Kayla Nichols, communications director for Pesticide Action & Agroecology Network, a distributed global network, said the organization agrees with the study’s conclusion that more research should be done on the rise in lung cancer, particularly in individuals eating diets higher in produce and fiber.
“There is a large subset of lung cancer patients whose disease is not caused by smoking,” the researcher told Fox News Digital. (iStock)
“There is a bounty of existing research that already links pesticide exposure to increased risk of multiple types of cancers,” Nichols, who was also not involved in the study, told Fox News Digital. She called for more research on chronic, low-level exposures to pesticides, as well as more effective policies to protect the public from pesticide residues on food.
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The study was supported by the National Institutes of Health and the National Cancer Institute, as well as industry partners including AstraZeneca and Genentech, among others.
Fox News Digital reached out to several pesticide companies and trade groups for comment.
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Colorectal cancer, once considered a disease of older age, is becoming a crisis for younger adults. New research shows one group getting hit the hardest – those without a college degree.
A recent study from the American Cancer Society analyzed data from over 101,000 adults aged 25 to 49 who died from colorectal cancer between 1994 and 2023.
While death rates remained stable for college graduates, they climbed significantly for those without a bachelor’s degree, the findings showed.
WIDESPREAD HABIT MAY RAISE COLORECTAL CANCER RISK MORE THAN YOU THINK
For young adults with a high school education or less, the mortality rate rose from 4.0 to 5.2 per 100,000 people, while the rate for those with at least a bachelor’s degree stayed flat, at approximately 2.7 per 100,000.
This does not mean that a degree offers some kind of biological protection, researchers cautioned.
Colorectal cancer, once considered a disease of older age, is becoming a crisis for younger adults. (iStock)
The difference is likely driven by the conditions in which people live and work, which often correlate with education levels, the researchers noted.
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The study suggests that the higher death rates are likely driven by differences in the prevalence of risk factors, including obesity, physical inactivity, smoking and diet, which are “known to be elevated among children and young adults with lower [socioeconomic status].”
Because the study relied on death certificates, researchers couldn’t say exactly why college graduates had better outcomes.
Because the researchers didn’t have the patients’ actual medical records, they couldn’t see things like frequency of screenings or treatment options, which would impact survival outcomes. (iStock)
Certificates typically list the cause of death, age, race and education level, but they do not include a person’s full medical history.
RED FLAGS FOR COLORECTAL CANCER THAT WARRANT SCREENINGS BEFORE 45 YEARS OF AGE
Because the researchers didn’t have the patients’ actual medical records, they couldn’t see things like frequency of screenings or treatment options, which would impact survival outcomes.
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Colorectal cancer is now the leading cause of cancer death for men under 50 and the second leading cause for women in the same age group, according to recent statistics.
While colorectal cancer death rates remained stable for college graduates, they climbed significantly for those without a bachelor’s degree, the findings showed. (iStock)
Because the disease is highly treatable when caught early, the U.S. Preventive Services Task Force (USPSTF) lowered the recommended screening age from 50 to 45 in 2021.
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Common signs and symptoms of colorectal cancer can include a change in bowel habits, such as diarrhea, constipation or narrowing of the stool, that lasts for more than a few days, according to the American Cancer Society.
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Other signs that warrant seeing a doctor include blood in the stool or a persistent feeling of needing to go to the bathroom but being unable to go.
The research was published in JAMA Oncology.
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