Featured Research

from universities, journals, and other organizations

BPA alters development of in vitro ova and could increase risk of Down syndrome, study suggests

Date:
September 23, 2011
Source:
Universitat Autònoma de Barcelona
Summary:
Researchers in Spain analysed the effects of bisphenol A (BPA), a polymer widely used to manufacture plastics, in an in vitro culture of ovaries. The research demonstrated that exposure to this substance gravely altered the development of oocytes and future ova, possibly diminishing the fertility of a woman's offspring and at the same time increasing the risk of Down Syndrome in following generations.

Researchers at Universitat Autònoma de Barcelona, in collaboration with the Vall d'Hebron Hospital Fetal Tissue Bank, the Department of Gynaecology and the Research Unit of Paediatric Endocrinology, analysed the effects of Bisphenol A (BPA), a polymer widely used to manufacture plastics, in an in vitro culture of ovaries. The research demonstrated that exposure to this substance gravely altered the development of oocytes and future ova, possibly diminishing the fertility of a woman's offspring and at the same time increasing the risk of Down Syndrome in following generations.

Related Articles


Bisphenol A (BPA) is omnipresent in the plastic of common products such as beverage bottles, cans or baby bottles.

The research, published in Human Reproduction, was carried out with a culture of 21,570 in vitro oocytes. Results demonstrated that exposure to Bisphenol A in concentration levels permitted by health authorities is harmful to the fetus. BPA reduces the number of oocytes (cells which develop into ova) and therefore can affect negatively a woman's fertility and double the risk of chromosome exchange during the cell division process. Specific observations of chromosome 21 in the development of 90 oocytes revealed that exposure to BPA could increase the risk of Down Syndrome in the future offspring of the fetus.

The research provides conclusive data for the debate on how BPA affects the health of individuals. Previous studies on mice and worms demonstrated that reproduction is affected and that exposure to BPA during gestation affects the viability and quality of the cells which later become ova developing in the fetus.

For the first time, human cells were used in a research to analyse the process of cell division of the oocytes -- meiosis -- in which chromosomes join and exchange material, i.e. meiotic recombination. Oocytes were cultured for 7, 14 or 21 days in different environments, with the presence of BPA and in control cultures without the substance. Data obtained in vitro with human cells was practically identical to that obtained with in vivo animal models, while the effects on meiotic recombination, which could lead to the appearance of Down Syndrome, in humans are even greater than those observed in mice.

"According to our results, BPA does not directly affect the fertility of pregnant women, but that of their daughters and granddaughters. It is a multigenerational effect," explains UAB professor Montserrat Garcia Caldés, director of the research. She goes on to say that "the increase in oocyte mortality in the fetus could diminish ovarian reserve numbers and the quality of the future mother's ova. At the same time, alterations in the recombination of chromosomes in the process of cell division increase the possibility of numerical alterations, such as monosomy (only copy of a chromosome in embryo cells) or trisomy (three copies)."

Concentration levels applied in the experiments were within the safety limits marked by European (EFSA) and US (EPA) authorities. The research therefore suggests that staying within legal limits does not imply that exposure to the substance is innocuous.

"We are exposed to BPA on a daily basis, mainly through oral exposure, since we can find it in lunch boxes, beverage bottles and food storage containers," Miguel Àngel Brieño-Enríquez reminds us. First author of the article, Brieño-Enríquez, from the University of San Luis Potosí, Mexico, is now researcher at the UAB Department of Cell Biology, Physiology and Immunology. According to him, "although we generally metabolise the substance, pregnant women retain more fluids and the fetus could be affected by high concentration levels."


Story Source:

The above story is based on materials provided by Universitat Autònoma de Barcelona. Note: Materials may be edited for content and length.


Journal Reference:

  1. M. A. Brieno-Enriquez, P. Robles, N. Camats-Tarruella, R. Garcia-Cruz, I. Roig, L. Cabero, F. Martinez, M. G. Caldes. Human meiotic progression and recombination are affected by Bisphenol A exposure during in vitro human oocyte development. Human Reproduction, 2011; 26 (10): 2807 DOI: 10.1093/humrep/der249

Cite This Page:

Universitat Autònoma de Barcelona. "BPA alters development of in vitro ova and could increase risk of Down syndrome, study suggests." ScienceDaily. ScienceDaily, 23 September 2011. <www.sciencedaily.com/releases/2011/09/110921074742.htm>.
Universitat Autònoma de Barcelona. (2011, September 23). BPA alters development of in vitro ova and could increase risk of Down syndrome, study suggests. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2011/09/110921074742.htm
Universitat Autònoma de Barcelona. "BPA alters development of in vitro ova and could increase risk of Down syndrome, study suggests." ScienceDaily. www.sciencedaily.com/releases/2011/09/110921074742.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Best Tips to Curb Holiday Carbs

The Best Tips to Curb Holiday Carbs

Buzz60 (Dec. 19, 2014) — It's hard to resist those delicious but fattening carbs we all crave during the winter months, but there are some ways to stay satisfied without consuming the extra calories. Vanessa Freeman (@VanessaFreeTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Sierra Leone Bikers Spread the Message to Fight Ebola

Sierra Leone Bikers Spread the Message to Fight Ebola

AFP (Dec. 19, 2014) — More than 100 motorcyclists hit the road to spread awareness messages about Ebola. Nearly 7,000 people have now died from the virus, almost all of them in west Africa, according to the World Health Organization. Video provided by AFP
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) — In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
The Best Protein-Filled Foods to Energize You for the New Year

The Best Protein-Filled Foods to Energize You for the New Year

Buzz60 (Dec. 19, 2014) — The new year is coming and nothing will energize you more for 2015 than protein-filled foods. Fitness and nutrition expert John Basedow (@JohnBasedow) gives his favorite high protein foods that will help you build muscle, lose fat and have endless energy. Video provided by Buzz60
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

 

Health & Medicine

Mind & Brain

Living & Well

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