Featured Research

from universities, journals, and other organizations

Placental cells may prevent viruses from passing from mother to baby

Date:
July 1, 2013
Source:
University of Pittsburgh Schools of the Health Sciences
Summary:
Cells of the placenta may have a unique ability to prevent viruses from crossing from an expectant mother to her growing baby and can transfer that trait to other kinds of cells. The findings could point to new approaches to combat viral infections.

Cells of the placenta may have a unique ability to prevent viruses from crossing from an expectant mother to her growing baby and can transfer that trait to other kinds of cells, according to researchers at Magee-Womens Research Institute (MWRI) and the University of Pittsburgh School of Medicine. Their findings, published in the early online version of the Proceedings of the National Academy of Sciences, shed new light on the workings of the placenta and could point to new approaches to combat viral infections during pregnancy.

Related Articles


It is imperative that the fetus be protected from infections of its mother in order to develop properly, said co-senior investigator Yoel Sadovsky, M.D., Elsie Hilliard Hillman Chair of Women's Health Research, professor of obstetrics, gynecology and reproductive medicine, Pitt School of Medicine, and MWRI director. But how the placenta, long thought to be just a passive barrier between mother and child, accomplishes this feat has not been clear.

"Our findings reveal some of the complex and elegant mechanisms human placental cells, called trophoblasts, have evolved to keep viruses from infecting cells," Dr. Sadovsky said. "We hope that we can learn from this to devise new therapies against viral infections."

Led by Dr. Sadovsky and co-senior investigator Carolyn Coyne, Ph.D., associate professor, Department of Microbiology and Molecular Genetics at Pitt and MWRI member, the research team studied human trophoblast cells in the lab, exposing them to a panel of viruses. Unlike non-placental cells, trophoblasts were resistant to viral infection, but that trait was not a result of an inability of viruses to bind or enter the cells.

The researchers noted that when the medium, or fluid environment, in which the trophoblasts were cultured was transferred to non-placental cells, such as those that line blood vessels, they became resistant to viral infection, too.

The team noted that when the medium was exposed to sonication, which involves exposure to sound waves, viral resistance was no longer transferred to non-placental cells. This finding led them to take a closer look at exosomes, which are tiny spheres called nanovesicles that are secreted by trophoblasts and are sensitive to sonication. They found that fragments of genetic material called microRNAs contained within the exosomes, as well as lab-synthesized mimics of them, were able to induce autophagy, a mechanism of prolonged cellular recycling and survival. Blocking autophagy at least partially restored the cells' vulnerability to viral infections.

"Our results suggest this pathway could be a powerful evolutionary adaptation to protect the fetus and mother from viral invaders," Dr. Coyne said. "We might be able to use these microRNAs to reduce the risk of viral infection in other cells outside of pregnancy, or perhaps to treat diseases where enhancing autophagy would be beneficial."


Story Source:

The above story is based on materials provided by University of Pittsburgh Schools of the Health Sciences. Note: Materials may be edited for content and length.


Journal Reference:

  1. Elizabeth Delorme-Axford, Rogier B. Donker, Jean-Francois Mouillet, Tianjiao Chu, Avraham Bayer, Yingshi Ouyang, Tianyi Wang, Donna B. Stolz, Saumendra N. Sarkar, Adrian E. Morelli, Yoel Sadovsky, and Carolyn B. Coyne. Human placental trophoblasts confer viral resistance to recipient cells. PNAS, 2013 DOI: 10.1073/pnas.1304718110

Cite This Page:

University of Pittsburgh Schools of the Health Sciences. "Placental cells may prevent viruses from passing from mother to baby." ScienceDaily. ScienceDaily, 1 July 2013. <www.sciencedaily.com/releases/2013/07/130701151606.htm>.
University of Pittsburgh Schools of the Health Sciences. (2013, July 1). Placental cells may prevent viruses from passing from mother to baby. ScienceDaily. Retrieved March 5, 2015 from www.sciencedaily.com/releases/2013/07/130701151606.htm
University of Pittsburgh Schools of the Health Sciences. "Placental cells may prevent viruses from passing from mother to baby." ScienceDaily. www.sciencedaily.com/releases/2013/07/130701151606.htm (accessed March 5, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, March 5, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ringling Bros. Eliminating Elephant Acts

Ringling Bros. Eliminating Elephant Acts

AP (Mar. 5, 2015) The Ringling Bros. and Barnum & Bailey Circus is ending its iconic elephant acts. The circus&apos; parent company, Feld Entertainment, told the AP exclusively that the acts will be phased out by 2018 over growing public concern about the animals. (March 5) Video provided by AP
Powered by NewsLook.com
Raw: Tourists Visit Rare Grey Whales in Mexico

Raw: Tourists Visit Rare Grey Whales in Mexico

AP (Mar. 4, 2015) Once nearly extinct, grey whales now migrate in their thousands to Mexico&apos;s Vizcaino reserve in Baja California, in search of warmer waters to mate and give birth. Tourists flock to the reserve to see the whales, measuring up to 49 feet long. (March 4) Video provided by AP
Powered by NewsLook.com
Australian Museum Shares Terrifying Goblin Shark With the World

Australian Museum Shares Terrifying Goblin Shark With the World

Buzz60 (Mar. 4, 2015) The Australian Museum has taken in its fourth-ever goblin shark, a rare fish with an electricity-sensing snout and &apos;alien-like&apos; jaw. Mike Janela (@mikejanela) takes a look. Video provided by Buzz60
Powered by NewsLook.com
New Hormone Could Protect Against Diabetes And Weight Gain

New Hormone Could Protect Against Diabetes And Weight Gain

Newsy (Mar. 4, 2015) A newly discovered hormone mimics the effects of exercise, protecting against diabetes and weight gain. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins