Navigation Links
DEET in Bug Spray Tied to Neural Damage in Mice
Date:8/5/2009

More research needed to see if compound has same effect in humans, experts say

WEDNESDAY, Aug. 5 (HealthDay News) -- New French research suggests the main ingredient used in many insect repellants may affect the central nervous system, at least in mice.

And combining this ingredient -- DEET (N,N-Diethyl-3-methylbenzamide) -- with carbamates, a type of pesticide that is often used with DEET, compounded the effects.

Although the authors, publishing online Aug. 5 in BMC Biology, warn of potential dangers to humans, they also acknowledge the need for more studies on the subject.

Meanwhile, people should probably worry more about the health risks from mosquitoes and other insects than about the potential harms of DEET, experts said.

"This work was done primarily in test tubes in order to try to understand some of the mechanisms," said Dr. Ted Schettler, science director of the Science & Environmental Health Network. "The mechanistic information is very useful but the jury is still out on what implications this has for humans."

"DEET has been used for a very long time with very few bad outcomes," added Susan Paskewitz, a professor of entomology at the University of Wisconsin, Madison. "People have killed themselves by drinking it, but you can do that with alcohol or salt. And a few have had neurological symptoms after application for long periods and high doses."

As for the combination of DEET and carbamates, Paskewitz added, "if there are the kinds of synergies suggested by the study, they aren't happening very often. I also would guess that the actual concentration in the body is much lower than they had to use in the study to see an effect in the mouse tissues."

But by better understanding the mechanisms by which DEET works, scientists may be able to come up with better repellant products, said Paul Sanberg, distinguished professor of neurosurgery and director of the University of South Florida Center for Aging and Brain Repair in Tampa.

DEET is the most common active ingredient in insect repellents and is used worldwide by about 200 million people annually. However, relatively little is known about how the compound actually works.

From this study, it now appears that not only does DEET change the behavior of insects, it also inhibits the acetylcholinesterase enzyme, which is involved in the central nervous system, in both insects and mice.

Organophosphates and carbamate insecticides employ the same mechanism of action and, when combined with DEET in these experiments, increased the toxicity of the chemicals.

"This study demonstrates the vital importance of looking at chemicals in combination," Schettler said. "This shows that when you combine chemicals, you can get unpredictable results."

The authors, from different research institutions in France, say this is the first time a molecular target for DEET has been identified.

Interestingly, the class of drugs known as cholinesterase inhibitors are used to treat Alzheimer's and can delay the decline of symptoms for up to a year.

Sanberg said the effects of DEET, like many chemicals and drugs, can simply depend on the individual using it.

An earlier study found a strong association between exposure to acetylcholinesterase inhibitors and the Gulf War illness suffered by many veterans. Organophosphates have also been linked with acute lymphoblastic leukemia, the most common form of leukemia in children.

More information

The U.S. Environmental Protection Agency has more on DEET.



SOURCES: Ted Schettler, M.D., science director, Science & Environmental Health Network; Paul Sanberg, Ph.D., D.Sc., distinguished professor, neurosurgery, and director, University of South Florida Center for Aging and Brain Repair, Tampa; Susan Paskewitz, Ph.D., professor, entomology, University of Wisconsin, Madison; Aug. 5, 2009 BMC Biology, online


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. New York Law Firm Files Lawsuit Against Manufacturer of Zicam Nasal Spray and Drugstore Chain That Sold Product
2. Winnipeg Veterinary Company Pharm-Vet Produces Essential Oil-Infused Mosquito Spray Thats a Welcome and Safe Alternative to Controversial Deet-Based Repellants
3. Ocean Spray Teams Up With the American Heart Associations Go Red For Women and Its Go Red BetterU Program
4. Coming Soon: Lung-Cancer Spray?
5. New Spray Could Benefit Cystic Fibrosis Patients
6. Video: NASONEX(R) (Mometasone Furoate Monohydrate) Nasal Spray, 50 mcg* Teams Up With American Forests to Educate Nasal Allergy Sufferers and Help Improve Air Quality
7. Groundbreaking First Response Spray Now Available in Europe
8. Topical Spray Helped Men With Premature Ejaculation
9. Premature ejaculation spray enables men to last 6 times longer after penetration
10. Strativa Pharmaceuticals Acquires Worldwide Rights to Nascobal(R) (Cyanocobalamin, USP) Nasal Spray From QOL Medical
11. CSA Medical, Inc. Announces Launch of New Web Site for Spray Cryotherapy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
DEET in Bug Spray Tied to Neural Damage in Mice
(Date:5/26/2016)... Indiana (PRWEB) , ... May 26, 2016 , ... ... provider of healthcare supply chain solutions, today announced the organization has earned its ... meets international standards and is compliant with all rules and policies associated with ...
(Date:5/26/2016)... Cypress, Texas (PRWEB) , ... May 26, 2016 , ... ... on Friday, May 13 at Blackhorse Golf Club in Cypress. With the help of ... a non-profit that restores, empowers, and renews hope for wounded service members and their ...
(Date:5/26/2016)... ... May 26, 2016 , ... The MIAMI Institute for Age ... speaker Dr. Adonis Maiquez MD, ABAARM. Dr. Adonis , Wellness Physician of the ... a member of the Institute for Functional Medicine. , He also heads up FITTLab, ...
(Date:5/26/2016)... ... May 26, 2016 , ... Bunion Bootie , the ... bunionette) treatment was more than humbled by customer demand over the Mother’s Day Weekend ... mid sale. Now that Bunion Bootie has completely replenished its inventory levels, it hopes ...
(Date:5/26/2016)... ... 26, 2016 , ... A health conscious snack that doesn't sacrifice taste? It's ... ignited an undeniable buzz in the protein product community by offering an alternative to ... doughnuts are packed with 11 grams of protein and made from a healthy blend ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... 2016  Zymo Research Corp. announced today the ... materials that help researchers obtain the most accurate ... The rapid growth of the study of microbiomes ... standard methods to improve the reproducibility and quality ... at every step of the measurement process including ...
(Date:5/25/2016)... As illustrated by the Spring ... the numbers and momentum of cannabis in the US ... billions, more research and development push the sector forward. ... Legal Marijuana Markets Report  from from ArcView Market Research ... the increase in sector is attributed to adult use ...
(Date:5/25/2016)... MedDay, a biotechnology company focused on the treatment ... "High doses of biotin in progressive multiple sclerosis: extension phase ... Ayman Tourbah , Principal Investigator of the Phase 3 ... Neurology (EAN) in Copenhagen, Denmark . The ... on Sunday, 29 May 2016 from 14:45 to 16:15 CEST ...
Breaking Medicine Technology: