From medicalnewstoday.com.For this study, researchers analyzed data from the U.S. Health and Retirement Study encompassing almost 4,000 adults who were ages 70 and over in 2016.
“The shingles vaccine is relatively new and recommended for older adults,” Jung Ki Kim, PhD, research associate professor of gerontology in the Leonard Davis School of Gerontology at the University of Southern California, and first author of this study, explained to MNT.
“Prior studies have found lower risks of dementia and other age-related conditions. We wanted to understand whether it might also be associated with [the] underlying biological processes related to aging,” said Kim.
Past studies have found that the shingles vaccine may lower a person’s risk for cardiovascular issues, such as heart failure, stroke, and coronary heart disease, as well as lower overall mortality risk.
Vaccinated people experience slower overall biological aging
Researchers used seven different aspects of biological aging in the body to come up with participants’ composite biological aging score:
adaptive immunity
blood flow
epigenetic aging
inflammation
innate immunity
neurodegeneration
transcriptomic aging
At the study’s conclusion, scientists found that participants who had received the shingles vaccine had a slower overall biological aging on average, when compared to those who did not receive the vaccination.
“This suggests that shingles vaccination may be linked not only to preventing infection and reducing its severity, but may also be more favorable to multiple biological systems, particularly inflammatory, and overall biological aging,” Crimmins said.
“While this is an observational study and cannot prove cause and effect, it adds evidence that a vaccine that affects immunity also affects biological processes that underlie multiple facets of aging biology,” she added.
Additionally, shingles vaccinated-participants had much lower inflammation measurements, slower epigenetic and transcriptomic aging, and lower composite biological aging scores, than those who were not vaccinated.
Kim explained that:
“Inflammation and molecular aging markers have been associated with many age-related health outcomes, including cardiovascular disease and cognitive decline. Finding consistent associations across these domains suggests that shingles vaccination may be linked to slower aging at a biological level, not just differences in the immune system.”
How might the shingles vaccine help slow biological aging?
Crimmins said one possible explanation as to how the shingles vaccine might help protect a person against aging and health issues that may increase biological aging is that preventing reactivation of the shingles virus may reduce chronic, low-grade inflammation, which is a key driver of aging.
“Vaccination may also influence immune regulation and gene expression in ways that support healthier aging,” she added.
“Our study suggests that beyond its role in preventing shingles, shingles vaccination is associated with slower biological aging in older adults,” Kim said. “These findings highlight the interaction of immune system changes due to vaccine and biological aging that may have additional positive consequences.”
“Future research should follow people over time to better understand causality, examine whether similar patterns are seen with the newer shingles vaccine, and explore whether changes in biological aging translate into meaningful health outcomes like reduced mortality or cognitive decline,” added Kim.
There are a lot of these articles reporting on the study, here's one from USC Davis.