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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News Search | All News Topics > Tobacco Industry News Topics : By Country | By State ; Press Releases by Industry Channel > All Tobacco Industry Press Releases Philip Morris International Recognized as Global Leader for Corporate Action on Climate Change for the Third Year Running LAUSANNE, Switzerland--(BUSINESS WIRE)--Oct. 25, 2016-- Philip Morris International Inc. (“PMI”) (NYSE/Euronext Paris: PM) today is recognized as a global leader in its action on climate change. For the third consecutive year, the company is on the CDP’s ‘Climate A List’ for taking comprehensive action to reduce greenhouse gas emissions and mitigate climate change, and for its transparent disclosure process. CDP, formerly known as the Carbon Disclosure Project, is the leading international not-for-profit organization assessing the work of companies worldwide in the area of climate change. Thousands of businesses submit annual climate disclosures to CDP for independent assessment against its scoring methodology. PMI’s ranking places the company among the top 9% of corporations, known as “A Listers.” CDP’s Climate Change benchmark report is produced at the request of 827 investors with assets of US$100 trillion. Commenting on the results, PMI’s Head of Environmental Sustainability, Andy Harrop, said: “We’re very pleased to be included on the CDP A List again, and remain dedicated to playing our part in limiting global warming. Building on the reduction of 200,000 tons of CO2 since 2010 across our operations, and our continued action to promote sustainable tobacco production and environmental improvements across our value chain, next year we will announce a suite of new targets based directly on climate science.” “PMI encourages strong action on climate change and supported an ambitious outcome to COP21 in Paris last December.
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