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Classification Methods For Identifying The Neural Characterics Of Antidepressant Treatment
Depression is a major public health problem, and one of the most important challenges for psychiatrists is to determine whether an individual with depression should receive cognitive-behavioral therapy or treatment with antidepressant medication. A study by researchers from Emory University, presented at the Annual Meeting of the Organization for Human Brain Mapping in San Francisco, used brain imaging along with sophisticated statistical techniques to examine the differences in brain function that result from these two different kinds of treatment. Forty individuals with depression were scanned with magnetic resonance imaging after undergoing cognitive behavioral therapy or antidepressant therapy. The researchers found that they could distinguish the brain activity of individuals undergoing the two different treatments, and in particular that the two treatments differently affected the communication of the brain areas that are thought to play a role in depression, including the communication between the prefrontal cortex and the nucleus accumbens, and between the subgenual cingulate and the thalamus. The results provide a basis for future research that will try to predict which individuals will benefit from different treatments for depression.
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'Humanized' Mice Speak Volumes
Mice carrying a "humanized version" of a gene believed to influence speech and language may not actually talk, but they nonetheless do have a lot to say about our evolutionary past, according to a report in the May 29th issue of the journal Cell, a Cell Press publication.
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Raptor Pharmaceuticals Doses First Patient In Phase 2b Clinical Trial Of DR Cysteamine For Cystinosis
Raptor Pharmaceuticals Corp. ("Raptor" or the "Company") (OTC Bulletin Board: RPTP), announced that it has dosed the first patient in its Phase 2b clinical trial, conducted in collaboration with the University of California, San Diego ("UCSD"), to evaluate Raptor"s proprietary delayed-release cysteamine bitartrate ("DR Cysteamine") capsules in nephropathic cystinosis ("cystinosis"), a rare genetic lysosomal storage disease. Under Raptor"s open Investigational New Drug application ("IND"), UCSD is performing the Raptor-sponsored trial at its General Clinical Research Center.
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Parkinson's Disease Associated With Pesticide Exposure In French Farm Workers

The cause of Parkinson"s disease (PD), the second most frequent neurodegenerative disease after Alzheimer"s disease, is unknown, but in most cases it is believed to involve a combination of environmental risk factors and genetic susceptibility. Laboratory studies in rats have shown that injecting the insecticide rotenone leads to an animal model of PD and several epidemiological studies have shown an association between pesticides and PD, but most have not identified specific pesticides or studied the amount of exposure relating to the association. A new epidemiological study involving the exposure of French farm workers to pesticides found that professional exposure is associated with PD, especially for organochlorine insecticides. The study is published in Annals of Neurology, the official journal of the American Neurological Association. Led by Alexis Elbaz M.D., Ph.D., of Inserm, the national French institute for health research in Paris, and University Pierre et Marie Curie (UPMC, Paris 6), the study involved individuals affiliated with the French health insurance organization for agricultural workers who were frequently exposed to pesticides in the course of their work. Occupational health physicians constructed a detailed lifetime exposure history to pesticides by interviewing participants, visiting farms, and collecting a large amount of data on pesticide exposure. These included farm size, type of crops, animal breeding, which pesticides were used, time period of use, frequency and duration of exposure per year, and spraying method. The study found that PD patients had been exposed to pesticides through their work more frequently and for a greater number of years/hours than those without PD. Among the three main classes of pesticides (insecticides, herbicides, fungicides), researchers found the largest difference for insecticides: men who had used insecticides had a two-fold increase in the risk of PD. "Our findings support the hypothesis that environmental risk factors such as professional pesticide exposure may lead to neurodegeneration," notes Dr. Elbaz. The study highlights the need to educate workers applying pesticides as to how these products should be used and the importance of promoting and encouraging the use of protective devices. In addition to the significance of the study for those with a high level of exposure to pesticides, it also raises the question about the role of lower-level environmental exposure through air, water and food, and additional studies are needed to address this question. Notes: This study is published in Annals of Neurology. To view the abstract for this article, please click here. Alexis Elbaz M.D., Ph.D., is director of research at Inserm, the national French institute for health research. Sean Wagner Wiley-Blackwell


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