Research links accelerated aging to cancer in younger persons.

“We all know cancer is an aging disease. However, it is really coming to a younger population. So whether we can use the well-developed concept of biological aging to apply that to the younger generation is a really untouched area,” said Dr. Yin Cao, an associate professor of surgery at the Washington University School of Medicine in St. Louis and senior author of the new research, which was presented Sunday at the American Association of Cancer Research’s annual conference in San Diego.

Factors of biological aging

Cao and her team looked at the medical records of 148,724 people ages 37 to 54 who are participants in a large data registry called the UK Biobank.

They homed in on nine blood-based markers that have been shown to correlate with biological age:

  • albumin: a protein made by the liver that declines with age
  • creatinine: a waste product in blood produced by protein digestion and the breakdown of muscle tissue; a measure of kidney function. Lower levels correlate with better longevity.
  • glucose: With age, blood sugar stays higher for longer after meals.
  • c-reactive protein: made by the liver in response to inflammation; relatively higher levels correspond to faster aging
  • lymphocyte percent: The concentration of these white blood cells related to immune function tends to decrease with age.
  • mean cell volume: a measure of the average size of red blood cells, which increases with age
  • red cell distribution width: the difference between the size of a person’s smallest and largest red blood cells, which tends to increase with age
  • alkaline phosphatase: an enzyme produced mainly by the liver and bones that tends to increase with age
  • white blood cell counts: Numbers of white cells in the high end of the normal range in the blood may correspond with greater aging.Following that, these nine numbers were entered into a program known as PhenoAge, which was utilized to determine the biological age of each individual under consideration. The researchers were able to determine the presence of accelerated aging by contrasting the chronological ages of individuals with their biological ages.

    After that, they looked through cancer registries to determine the percentage of people in the group who had been diagnosed with early malignancies. Early cancers were classified by the researchers as tumors that appeared before the age of 55. The number of malignancies that were diagnosed was quite close to 3,200.

    Researchers discovered that those who were born in 1965 or later had a 17% higher likelihood of exhibiting signs of accelerated aging compared to those who were born between the years 1950 and 1954.

    Exploring the relationship between accelerated aging and the likelihood of developing cancer

    The researchers found that faster aging was connected with an increased risk for cancer after they adjusted the data to account for factors that they believed might have influenced the results they obtained via their investigation. It was shown that the strongest connections were seen with malignancies of the uterus, the stomach and intestinal tract, and the lungs.

    Those individuals who scored the highest had a risk of early-onset lung cancer that was twice as high as those who scored the lowest in the biobank sample. Additionally, those individuals who scored the highest had a risk of gastrointestinal tumors that was more than sixty percent higher and a risk of uterine cancer that was more than eighty percent higher. In spite of the fact that the research was not intended to provide answers to queries concerning the reasons why these particular types of cancer appeared to have the strongest ties to accelerated aging, Ruiyi Tian, the doctoral student who lead the research, has some theories.

    In light of the fact that the lungs have a restricted capacity for regeneration, Tian suggested that it is probable that the lungs are more susceptible to the effects of aging than other types of tissues. According to her, inflammation, which is a factor that grows with age, has been related to malignancies of the stomach and the digestive tract.

    The fact that the researchers observed these signals in such a vast number of individuals is, according to Cao, the research’s greatest strength; nevertheless, she also notes that the study has some potential shortcomings.

    Not all of the participants in the study were monitored over the course of the trial. Since the findings of the blood test were only obtained from a single test, they only provided a snapshot of the risk, which may be subject to change. As she put it, the ideal scenario would be for researchers to be able to track the same group for a number of years, collecting blood samples at various points along the road, in order to obtain a more precise trajectory of their risk.

    “The ideal scenario would be that we would have multiple blood collections throughout the life course,” Cao added. “However, even in biobanks such as the UK Biobank, this is not feasible with the current technology.”

    In light of the fact that the effects of social elements that are intrinsically linked to racial prejudice need to be further illuminated, she suggested that the association should also be examined in populations that are more diverse.

    Dr. Anne Blaes, who does research at the University of Minnesota on the effects of biological aging in cancer survivors, expressed her excitement about the findings of the study. She stated that the findings could indicate a more effective method of identifying those who are at a higher risk of developing cancer while they are younger. At this time, young adults who do not have a family history of cancer or any other risk factor are not routinely examined for the majority of cancers.

    “We are observing an increasing number of cancers, particularly cancers of the gastrointestinal tract and breast cancers, in younger persons. According to Blaes, a professor and director of the Division of Hematology and Oncology at the University of Miami Medical School, “And if we had a way of identifying who is at higher risk for those, then really, you can imagine that we would be recommending screening at a different time.” There was no participation from her in the recent research. According to Blaes, if you are able to identify individuals who are at a greater risk due to the fact that their cells are aging at a faster rate, you can also focus lifestyle interventions, which include many aspects such as nutrition, exercise, and sleep.

    There are drugs that appear to be able to slow down the process of accelerated aging, as stated by Blaes, who is currently conducting clinical trials on two of these treatments in cancer survivors. Patients who have survived cancer frequently exhibit signs of increased biological aging, which may be a consequence of the aftereffects of treatments such as chemotherapy and radiation.

    These pharmaceuticals are classified as senolytics, which are treatments that are believed to target and eliminate cells that have been harmed or that have aged.

    At this time, it is not entirely obvious who would benefit from these medications; however, examinations of accelerated aging such as PhenoAge could one day assist in directing medical professionals to the individuals who have the greatest requirement for them.

    “I find it to be quite fascinating. This is very, really significant work,” Blaes said. “It’s not quite prime time, where we would go out and prescribe those meds for individuals, but it’s still a lot of work.”

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