THURSDAY, Feb. 7, 2019 (HealthDay News) — Certain strains of HPV are known to cause cervical cancer and other types of tumors. Now, a new study raises the possibility that they might also contribute to heart disease.
Researchers found that among over 63,000 women, those infected with “high-risk” strains of human papillomavirus (HPV) were somewhat more likely to develop heart disease or suffer a stroke over the next several years.
The connection was seen mainly among women who were obese or had metabolic syndrome — a collection of risk factors for heart disease and stroke that includes high blood pressure and elevated blood sugar.
The findings do not prove that high-risk HPV directly contributes to cardiovascular disease, said Dr. Ann Bolger, a cardiologist and professor at the University of California, San Francisco.
With studies like this, “there’s always a possibility” that some other factors could explain the connection, said Bolger, who was not involved in the research.
“But I think these are fascinating data,” she added. “This should be explored further.”
HPV is a group of over 200 related viruses. Some of them are sexually transmitted and can cause genital warts. In some people, the infection becomes persistent; and persistent infection with high-risk HPV strains can eventually trigger cancer.
Those infections are behind virtually all cases of cervical cancer, according to the U.S. National Cancer Institute. And they often cause some rarer cancers, including tumors of the vagina, penis, anus and throat.
Still, there is no proof that high-risk HPV strains can directly damage arteries and contribute to heart attacks and strokes.
What’s needed now is more lab research, said senior researcher Dr. Seungho Ryu.
One possibility is that HPV directly feeds artery-clogging plaques by infecting cells in the walls of the blood vessels, according to Ryu, a professor at Sungkyunkwan University School of Medicine, in Seoul, South Korea.
Or, Ryu said, the virus might have more “indirect” effects by spurring systemic, chronic inflammation in the body.
That, however, is speculation for now.
The findings, published Feb. 7 in Circulation Research, are based on 63,411 Korean women who were free of heart trouble at the start of the study. All underwent HPV testing, and just under 8 percent were found to carry a high-risk strain.