Higher cigarette pack-years related to smaller volumes in several subcortical regions. Magnetic resonance imaging studies of cigarette smoking-related effects on human brain structure have primarily employed voxel-based morphometry, and the most consistently reported finding was smaller volumes or lower density in anterior frontal regions and the insula. Much less is known about the effects of smoking on subcortical regions. We compared smokers and non-smokers on regional subcortical volumes, and predicted that smokers demonstrate greater age-related volume loss across subcortical regions than non-smokers. Non-smokers (n = 43) and smokers (n = 40), 22–70 years of age, completed a 4 T MRI study. Bilateral total subcortical lobar white matter (WM) and subcortical nuclei volumes were quantitated via FreeSurfer. In smokers, associations between smoking severity measures and subcortical volumes were examined. Smokers demonstrated greater age-related volume loss than non-smokers in the bilateral subcortical lobar WM, thalamus, and cerebellar cortex, as well as in the corpus callosum and subdivisions. In smokers, higher pack-years were associated with smaller volumes of the bilateral amygdala, nucleus accumbens, total corpus callosum and subcortical WM. Results provide novel evidence that chronic smoking in adults is associated with accelerated age-related volume loss in subcortical WM and GM nuclei. Greater cigarette quantity/exposure was related to smaller volumes in regions that also showed greater age-related volume loss in smokers.
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Oct 3, 2017 - Evansville Courier & Press Gary Thurby, left, and Heath Thurby are third- and fourth-generation tobacco farmers at Thurby Farms in Henderson County, Ky., Friday afternoon. They are hoping the tobacco crop this year makes up for the meager harvest of the past two years. DENNY SIMMONS / COURIER & PRESS ( continue reading ) Click one of the buttons below or search. Here you can find useful examples and description about searching the news archive. Read it carefully to get the best results. If you need more help, please contact us. Searching is case insensitive. Words music and mUSIC return the same results. Some of the common words like the, is, etc. are not included in your search.
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6, 2016-- Philip Morris International Inc. (“PMI”) (NYSE / Euronext Paris: PM) on Dec. 5 submitted a Modified Risk Tobacco Product (MRTP) application for its electronically heated tobacco product with the U.S. Food and Drug Administration’s (FDA) Center for Tobacco Products. This is consistent with the company’s stated goal of submitting its MRTP application in 2016. PMI anticipates the FDA taking a minimum of 60 days to complete an administrative review to determine whether to accept the application for substantive review. Philip Morris International Inc. (PMI) is the world’s leading international tobacco company, with six of the world's top 15 international brands and products sold in more than 180 markets. In addition to the manufacture and sale of cigarettes, including Marlboro, the number one global cigarette brand, and other tobacco products, PMI is engaged in the development and commercialization of Reduced-Risk Products (“RRPs”). RRPs is the term PMI uses to refer to products with the potential to reduce individual risk and population harm in comparison to smoking cigarettes. Through multidisciplinary capabilities in product development, state-of-the-art facilities, and industry-leading scientific substantiation, PMI aims to provide an RRP portfolio that meets a broad spectrum of adult smoker preferences and rigorous regulatory requirements.