Navigation Links
Harmful effects of bisphenol A proved experimentally
Date:1/22/2013

Bisphenol A (BPA) is a chemical compound that is included in the composition of plastics and resins. It is used, for example, in the manufacture of food containers such as bottles and babies' feeding bottles. It is also found in the protective films used inside food and drink cans and on till receipts where it used as a discloser. Significant levels of BPA have also been found in human blood, urine, amniotic fluid and placentas. Recent studies have shown that this industrial component has harmful effects on reproductive ability, development and the metabolism of laboratory animals. BPA is strongly suspected of having the same effects on humans.

As a precautionary measure, the manufacture and sale of babies' feeding bottles containing bisphenol A have been banned in Europe since January 2011. This ban will be extended in France to all food containers from July 2015. It will also be important to ensure that in the future, bisphenol A is not replaced by substitutes that have the same action.

In an article published in PLOS ONE, Ren Habert and his colleagues provide the first experimental proof that weak concentrations of bisphenol A are sufficient to produce a negative reaction on the human testicle. No experimental study has shown hitherto that bisphenol A has a deleterious effect on male human reproduction and the few epidemiological studies that exist remain contradictory.

In collaboration with the Antoine-Bclre Hospital, Clamart[1], researchers kept petri dishes of human ftal testicles alive in the presence of bisphenol A or in the absence thereof, using an original procedure developed by this team. In 2009, this procedure made it possible to show for the first time, that phtalates (a different category of endocrine disruptors[2] that are found in PVC, plastics, synthetic materials, sprays, etc.) inhibit the development of future spermatozoa in the human ftus.

In this new study, researchers observed that exposure of human ftal testicles to bisphenol A reduces the production of testosterone, and of another testicular hormone that is necessary for the testicles to descend into the sacs in the course of ftal development. A concentration equal to 2 micrograms per litre of bisphenol A in the culture medium was sufficient to produce these effects. This concentration is equal to the average concentration generally found in the blood, urine and amniotic fluid of the population.

Testosterone is known to be produced by the testicle during the life of the ftus, imposing masculinisation of the internal and external genitals which, in the absence of testosterone, develops spontaneously in the female direction. Furthermore, it is likely that testosterone also plays a role in the development of the testicle itself. Consequently, the current exposure of pregnant women to bisphenol A may be one of the causes of congenital masculinisation defects (of the hypospadia and cryptorchidism types) the frequency of which has doubled overall in the past 40 years. According to Ren Habert, "it is also possible that bisphenol A contributes to a reduction in the production of sperm and the increase in the incidence of testicular cancer in adults that have been observed in recent decades".

Furthermore, researchers have compared the response to bisphenol A in human ftal testicles to those in the ftal testicles of rats and mice. "We have observed that the human species is far more sensitive to bisphenol A than the rat and the mouse. These results should encourage greater caution in regulatory toxicology in the extrapolation of data obtained on animals to define tolerable exposure thresholds in human health", explains Ren Habert.

Finally, the researchers show in this article that Bisphenol A acts through a mechanism that is non-standard and that remains unknown but that it is important to identify in order to better understand the action of endocrine disruptors.


'/>"/>

Contact: Press Office
presse@inserm.fr
INSERM (Institut national de la sant et de la recherche mdicale)
Source:Eurekalert

Related medicine news :

1. OH YUK! Did You Know Your Jetted Hot Tub Houses All Sorts Of Harmful Bacteria and BioFilm?
2. Common anesthetic agents can be harmful for the development of the fetus
3. University of Tennessee study: Unexpected microbes fighting harmful greenhouse gas
4. Harmful Chemicals Found in Day Care Centers, Study Says
5. Mild increases in thyroid-stimulating hormone not harmful in the elderly
6. Stem-cell-protecting drug could prevent the harmful side effects of radiation therapy
7. Repeated exposure to traumatic images may be harmful to health
8. Hookah Effects as Harmful as Cigarettes, Study Finds
9. Chronic Butter Flavoring Exposure Linked to Harmful Brain Process
10. Some harmful effects of light at night can be reversed
11. Business Travel Harmful to Health: Medical & Personal Fitness Experts Announce "Exercise is Solution to Many Travel Ailments"
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... , ... May 27, 2016 , ... This campaign aims ... stroke, which we as a society can control and change. , As nearly 795,000 ... every 40 seconds within the United States. Plus, with an estimated 129,000 of these ...
(Date:5/27/2016)... ... May 27, 2016 , ... Aimed at nurses ... human interest stories, courtesy of leaders in the nursing and health care industry. ... from leading advocates and associations—namely Jones & Bartlett Learning. , Jones & Bartlett ...
(Date:5/26/2016)... ... ... last week’s media reports hinting at a June rate hike after the Federal Reserve’s ... interest rate increase, according to Rajeev Dhawan of the Economic Forecasting Center at Georgia ... (FOMC) dot charts are of interest to the press for their noise potential,” Dhawan ...
(Date:5/26/2016)... ... May 26, 2016 , ... Intalere, the healthcare industry ... for its inaugural Member Conference at the Paris Hotel in Las Vegas, Nev., ... health of America’s healthcare providers. , The conference was highlighted by the announcement ...
(Date:5/26/2016)... ... , ... The Woodlands at John Knox Village , Florida’s first Life ... living and healing, celebrated its grand opening, today. The Woodlands at John Knox Village ... Empowered Staff. , “This is an incredibly fulfilling time for John Knox Village as ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... Texas , May 25, 2016 ... the issuance to it by the US Patent ... The company,s technology includes proprietary processes for electronic ... for health and wellness programs, HIPAA compliance and ... "Our technology ...
(Date:5/24/2016)... AMSTERDAM , May 24, 2016 ... aplicación médica para ayudar a los médicos a compartir ... los pacientes a escala mundial. Profesionales médicos de Europa, ... ya se han apuntado a la aplicación, que combina ... en un entorno totalmente seguro. Educación   ...
(Date:5/24/2016)... LAWRENCE, Mass. , May 24, 2016  NxStage ... medical technology company focused on advancing renal care, today ... Officer, plans to participate in the following schedule of ... will be made available at http://ir.nxstage.com/ . ... Jefferies Healthcare Conference NY, NY           Friday, ...
Breaking Medicine Technology: