Breast milk may spread viruses that cause breast cancer

Breast milk and HPV

We all know that faulty genetics is partially responsible for breast cancer in a family. But faulty genetics is not the sole risk factor for breast cancer that spreads from a mother to her daughter(s).

Studies suggest that viruses that cause or increase risk of breast cancer can spread from one generation to another through breast milk.

Dr. W.K. Glenn and colleagues published a study in BMC Research Notes that had found high risk human papillomavirus and Epstein Barr virus in human breast milk and babies drinking the virus-loaded milk may contract the cancer-causing viruses.

The authors reported that multiple viruses including human immunodeficiency virus (HIV), Epstein Barr virus (EBV) and mouse mammary tumour virus have already been identified in human milk and high risk human papillomavirus (HPV) sequences have already been identified in breast cancer tissue.

Apparently, baby girls who drink milk from their infected mothers may get infected with the viruses. But the current study has found these viruses may also be present in human milk from normal lactating women who had no history of breast cancer.

The researchers found high risk HPV in 15% of milk samples from normal lactating Australian women. Four samples were sequenced and HPV 16 was found in three samples and HPV 18 was found in one sample. Epstein Barr virus was detected in 33% of breast milk samples.

The researchers concluded "The presence of high risk HPV and EBV in human milk suggests the possibility of milk transmission of these viruses. However, given the rarity of viral associated malignancies in young people, it is possible but unlikely, that such transmission is associated with breast or other cancers."

Although HPV was found in non-cancerous tissue, HPV was also found in breast cancer tissue, suggesting that these viruses may play a role in the development of certain cases of breast cancer.

By David Liu, PHD @foodconsumer.org

Studies show that preteen girls who get the HPV vaccination are not more inclined toward promiscuity than those who don't

An electron micrograph of the
human papilloma virus.
(National Cancer Institute photo)

 

The most recent study of preteen girls who received the vaccine for the human papilloma virus (HPV) found that they were no more likely than unvaccinated girls to get pregnant, develop sexually transmitted infections or seek birth-control counseling. The findings in Monday's issue of Pediatrics are in line with recent studies on British teens, which also dismissed concerns that getting the vaccination might encourage promiscuity.  USA Today reporter Michael Healy writes that while the latest results were based on parental or self-reporting, the reports were corroborated by medical tests, clinical markers of sexual activity and other behavior markers.

Robert Bednarczyk, a clinical investigator with the Kaiser Permanente Center for Health Research-Southeast and an epidemiologist at Emory University in Atlanta., queried 1,398 girls, aged 11 and 12, and analyzed their medical records. He and colleagues divided the girls into two groups and followed them for three years. "One group of 493 girls received at least one dose of the HPV vaccine Gardasil, along with other recommended vaccines for tetanus and meningitis. A comparison group of 905 girls received the tetanus and meningitis vaccines, but not HPV," Healy writes. "There was a very similar rate of testing, diagnosis and counseling between both groups," with no increase in pregnancies, STIs or birth-control counseling, Bednarczyk reported. Fewer than 1 percent of all girls tested positively for a sexually transmitted infection, and fewer than 1 percent had a positive pregnancy test.  (Read more)

Eastern Kentucky native wants to alert Appalachian women about their high rate of cervical cancer and how to prevent it

University of Kentucky physician and Pike County native Baretta Casey, right, has spent most of her career providing health care and education throughout the state, with a focus on Appalachian Kentucky. The health disparities between Eastern Kentucky and the rest of the state, especially high rates of cancer, are of "special concern" to Casey, reports Ann Blackford of UKNow.

Cancer is prevalent in her Casey's own family, and this is why she "has taken on the challenge of helping reduce cancer rates in Kentucky, especially cervical cancer and other Human papillomavirus cancers," Blackford reports. Cervical cancer rates are highest in rural and Appalachian Kentucky. According to the Kentucky Cancer Registry from 2005 to 2009, the cervical cancer rate in the region was 9.85 per 100,000 people. The state rate was 8.6. The average of deaths per year in the region from cervical cancer was 258.

"We have the tools to change these high rates and make a real difference in people's lives," Casey said. "I feel the best thing I can do for the people of Eastern Kentucky is to educate about prevention and screening of cervical cancer." Casey became the director of the Cervical Cancer-free Kentucky Initiative at UK's College of Public Health's Rural Cancer Prevention Center in 2010. Through this position, she makes connections with county health departments, community organizations and health advocacy groups that provide education and funding for cervical cancer prevention projects.

"Casey is passionate about educating people on the importance of vaccinating their children against HPV," Blackford writes. She said she wants people to look past the controversy of vaccinating their children and realize the importance of the vaccine. "The vaccine given for the appropriate reason can save a life," Casey said. (Read more)

HPV-linked cancers on rise, more prevalent in Kentucky

The human papillomavirus, which is generally blamed for causing cervical cancer, is being linked to the formation of several other kinds of cancer, and Kentuckians are getting these diseases in unusually high numbers, reports Laura Ungar of The Courier-Journal.

HPV is being linked to cancers of the vagina, vulva, penis, anus and lung, as well as the head and neck. "It's turning out to be a pretty bad actor ... an extensive health problem," said Dr. Daniel Metzinger, a gynecological oncologist with University of Louisville Physicians.

Kentucky's rates for HPV-related cancer are among the highest in the country. Part of the reason may be that smoking is a risk factor and Kentucky has the nation's highest smoking rate, Ungar reports. "I'm seeing more of it for sure," said Metzinger. "It used to be a disease we'd see in older people. Now, we see it in younger and younger people."

One way to protect against the virus is to be immunized with the HPV vaccine. A federal committee recommends vaccinating 11- and 12-year-old girls through to women up to age 26. Boys and men should also be immunized from age 11 to age 21. The immunization must occur before the patient is sexually active, since HPV is sexually transmitted.

In 2010, just 49 percent of adolescent girls nationwide received at least the first of the vaccine's three doses, and only a third had gotten all three, which are required for full effectiveness. In Kentucky that year, only 25 percent of adolescent females had gotten the first dose, and fewer than 11 percent have received all three doses, according to Cervical Cancer-Free Kentucky.

National Cancer Institute numbers show more than half of sexually active people are infected with HPV at some point. Usually, it goes away on its own within a few years. "But it can also set the stage for cancer," Ungar reports. "Across the nation, about 26,000 new cancers attributed to HPV occur each year, with 18,000 in women and 8,000 in men." (Read more)