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Op-Eds: Pharma In Africa; U.S. Global TB Funding; ITN Distribution Strategies Examined
Economic Crisis Presents Opportunity To Reform Pharmaceutical Practices In Africa, Says UNAIDS Head

AstraZeneca Studies Show Relief Of Nighttime Heartburn And Reduction In GERD-Related Sleep Disturbances
Two studies from AstraZeneca (NYSE: AZN) show that symptomatic gastroesophageal reflux disease (GERD) patients treated with NEXIUM(R) (esomeprazole magnesium) 20 mg daily experienced greater relief from nighttime heartburn and GERD-related sleep disturbances compared with patients taking placebo over four weeks(1). NEXIUM 20 mg is indicated for the treatment of heartburn and other symptoms associated with GERD. NEXIUM, in a class of drugs called proton pump inhibitors (PPIs), demonstrated efficacy in relieving moderate-to-severe nighttime heartburn and GERD-related sleep disturbances in two randomized, placebo-controlled trials(2). These findings were presented in three separate abstracts at Digestive Disease Week 2009 in Chicago.
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Insight Into Early Schizophrenia May Aid Understanding Of Disease Development, Diagnosis And Treatment
Significant and widespread cognitive problems appear to exist in schizophrenia in its earliest phase, making it very hard for people with the disorder to work, study or be social, according to a new study published by the American Psychological Association.
Cardiovascular

Deet, The Popular Insect Repellent, Found To Be Neurotoxic

The active ingredient in many insect repellents, deet, has been found to be toxic to the central nervous system. Researchers writing in the open access journal BMC Biology say that more investigations are urgently needed to confirm or dismiss any potential neurotoxicity to humans, especially when deet-based repellents are used in combination with other neurotoxic insecticides. Vincent Corbel from the Institut de Recherche pour le Dē©veloppement in Montpellier, and Bruno Lapied from the University of Angers, France, led a team of researchers who investigated the mode of action and toxicity of deet (N,N-Diethyl-3-methylbenzamide). Corbel said, "We"ve found that deet is not simply a behavior-modifying chemical but also inhibits the activity of a key central nervous system enzyme, acetycholinesterase, in both insects and mammals". Discovered in 1953, deet is still the most common ingredient in insect repellent preparations. It is effective against a broad spectrum of medically important pests, including mosquitoes. Despite its widespread use, controversies remain concerning both the identification of its target sites at the molecular level and its mechanism of action in insects. In a series of experiments, Corbel and his colleagues found that deet inhibits the acetylcholinesterase enzyme - the same mode of action used by organophosphate and carbamate insecticides. These insecticides are often used in combination with deet, and the researchers also found that deet interacts with carbamate insecticides to increase their toxicity. Corbel concludes, "These findings question the safety of deet, particularly in combination with other chemicals, and they highlight the importance of a multidisciplinary approach to the development of safer insect repellents for use in public health". Notes: Evidence for inhibition of cholinesterases in insect and mammalian nervous systems by the insect repellent deet Vincent Corbel, Maria Stankiewicz, Cedric Pennetier, Didier Fournier, Jure Stojan, Emmanuelle Girard, Mitko Dimitrov, Jordi Molgo, Jean Marc Hougard and Bruno Lapied BMC Biology (in press) Article available at journal website: http://www.biomedcentral.com/bmcbiol/ Graeme Baldwin BioMed Central


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