Wildlife Gardeners - North American Wildlife Gardening  

Go Back   Wildlife Gardeners - North American Wildlife Gardening > Reduce That Ecological Footprint > North American News and Current Events

Reply
 
LinkBack Thread Tools Display Modes
Old 05-20-2009, 06:40 PM   #1
WG Staff
 
Staff's Avatar
 
Join Date: Nov 2008
Default Bisphenol A stifles thyroid hormone and slows frog development.

Bisphenol A stifles thyroid hormone and slows frog development.
May 12, 2009
Heimeier, R, B Das, DR Buchholz and YB Shi. 2009. The xenoestrogen bisphenol A inhibits postembryonic vertebrate development by antagonizing gene regulation by thyroid hormone. Endocrinology doi:10.1210/en.2008-1503.

Bisphenol A stifles thyroid hormone and slows frog development. — Environmental Health News
excerpts from above:
Quote:
Context

Bisphenol A (BPA) is added to plastic to make it more durable and help it keep its shape. It is mostly found in hard polycarbonate plastics and epoxy resins. Products such as polycarbonate water and baby bottles, medical devices (tubes), toys, compact discs, sports equipment and plastic pipes can contain BPA.

A new study reveals that by interfering with thyroid hormone, exposure to low levels of bisphenol A (BPA) slows the rate at which tadpoles develop into frogs. Thyroid signals are necessary both for normal frog metamorphosis and for human development. In these experiments, exposure levels similar to those found in human infants kept certain genes from turning on, thus delaying tadpole development. Analyzing tadpole metamorphosis is an ideal model system for observing the consequences of BPA exposure on the thyroid system, say the authors.
__________________
The tendency of man's nature to good is like the tendency of water to flow downwards.
-Mencius
Staff is offline   Reply With Quote
Old 03-19-2010, 07:19 PM   #2
WG Staff
 
Staff's Avatar
 
Join Date: Nov 2008
Default FDA reverses decision on BPA

FDA reverses decision on BPA
Mon, Jan 18 2010 at 3:00 PM EST
Jenn Savedge

FDA reverses decision on BPA | MNN - Mother Nature Network#
excerpt from above:
Quote:
The FDA announced that it now has “some concern” about the effects of bisphenol A on children’s health and is launching new research to answer key questions that may lead to regulation of the chemical. FDA Commissioner Margaret Hamburg said that her agency has embraced the conclusion of the National Toxicology Program, which announced two years ago after a review of the science that there is “some concern” about developmental and reproductive problems in infants and children exposed to BPA.

This is a major shift for the FDA because in 2008 it concluded in a draft report that BPA was safe...
__________________
The tendency of man's nature to good is like the tendency of water to flow downwards.
-Mencius
Staff is offline   Reply With Quote
Old 03-20-2010, 12:39 AM   #3
Official Plant Nerd
 
Equilibrium's Avatar
 
Join Date: Dec 2008
Default

"Unfortunately, the attitude shift stops there. Hamburg said the FDA will not at this point ban or restrict BPA or recommend that consumers stop buying products that contain it.".... hmmmm, maybe the FDA shouldn't have based their report on research provided by the ACC and its stakeholders.... there seems to be a lot of this going around lately. Lemme guess.... they're waiting for the ACC and its stakeholders to provide them with new research so they can put all our fears to rest.
__________________
"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind."
- Dr. Seuss
Equilibrium is offline   Reply With Quote
Reply

Tags
bisphenol, bisphenol a, development, fda, frog, hormone, national toxicology program, slows, stifles, thyroid

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 12:43 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.2