A new study from researchers at the University of North Carolina at Chapel Hill has found a link between early-life alcohol consumption and aggressive, high-grade prostate cancer. The study also found that heavy cumulative alcohol consumption over the course of a man’s life had a similar association with this type of prostate cancer.
The research was published in the journal Cancer Prevention Research on August 23.
“There’s been relatively little progress in identifying risk factors for prostate cancer,” said Dr. Emma Allott, senior author for the study. “Other hormonally regulated cancers, such as breast cancer, already have a known association with alcohol use. But the role that alcohol consumption may have in the development of prostate cancer, especially over the life course, isn’t as well understood, so it remains an important area of study.”
Dr. Allott led the research, along with her collaborators, while she was assistant professor of nutrition in University of North Carolina Gillings School of Global Public Health. She since has joined Queen’s University Belfast as a lecturer in molecular cancer epidemiology at the Centre for Cancer Research and Cell Biology.
[Photo: Dr. Emma Allott]
The team of researchers evaluated survey data obtained from 650 men at the time of prostate biopsy. Men who reported consuming more than seven alcoholic drinks weekly as teenagers between the ages of 15 and 19 were three times more likely to be diagnosed with high-grade prostate cancer compared with men who reported no alcohol use during these years. Men who had seven or more alcoholic beverages per week throughout each decade of life were also three times more likely to be diagnosed with high-grade prostate cancer at the time of biopsy.
Prostate cancer is the most commonly diagnosed non-skin cancer in U.S. men and the second leading cause of male cancer deaths. The prostate develops rapidly during puberty and, as a result, scientists have hypothesized that boys may be more susceptible to cancer-causing substances during their adolescent years.
“We think that prostate cancer develops over the course of many years, or even decades, so studies like ours are working toward a clearer understanding not only of what the specific risk factors are, but how they may affect prostate biology at different stages of life,” said Dr. Allott.
Not all prostate cancers are high-grade, or the clinically significant, aggressive form of prostate cancer that grows quickly and potentially can lead to death. The researchers sought to investigate the potential relationship between early-life alcohol consumption and high-grade prostate cancer, believing that it is most important to identify risk factors for the aggressive form of the cancer. The researchers did not find an association between alcohol use and other less aggressive forms of prostate cancer.
Dr. Allott and her team evaluated survey data from a group of racially diverse men, ages 49-89 years, undergoing prostate biopsy at the Durham (N.C.) Veterans Affairs Medical Center between 2007 and 2018. Men completed a survey to assess the average number of alcoholic beverages consumed weekly during each decade of life, categorizing this as zero, one to six, or seven or more drinks each week to determine age-specific and cumulative lifetime alcohol intake.
The research was limited by its reliance on men’s recall of their historic alcohol intake. This could have resulted in biased responses, although the majority of men reported their alcohol intake prior to knowing their biopsy results. Additional research is needed to determine the risk factors for prostate cancer.
The research was funded by the American Institute for Cancer Research, the Irish Cancer Society and the National Institutes of Health.