http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. (Medical Xpress)—Researchers are finding that, long after a smoker leaves the premises, the toxicity caused by second-hand smoke remains and transforms into something even more deadly. http://medicalxpress.com/news/2013-03-toxicity-second-hand-smoker-premises.html Health Thu, 07 Mar 2013 08:00:01 EST news281863688 Mothers who are exposed to particulate air pollution of the type emitted by vehicles, urban heating and coal power plants are significantly more likely to bear children of low birth weight, according to an international study led by co-principal investigator Tracey J. Woodruff, PhD, MPH, professor of obstetrics and gynecology and reproductive sciences at UC San Francisco along with Jennifer Parker, PhD, of the National Center for Health Statistics, Centers for Disease Control and Prevention. http://medicalxpress.com/news/2013-02-maternal-exposure-outdoor-air-pollution.html Health Wed, 06 Feb 2013 00:20:01 EST news279307544 Nestled deep within the body, the epithelial lining of the respiratory system is nonetheless seriously exposed. Its direct contact with environmental air necessitates protective mechanisms that both seal off the respiratory tract from other compartments of the body and neutralize microbial invaders. This is achieved by the coordinated action of the functionally specialized various cell types that make up the lining of the airway. These respiratory cell populations include major ciliated cells, exocrine Clara cells, and neuroendocrine (NE) cells, all of which are generated by a common epithelial progenitor cell type during embryogenesis. http://medicalxpress.com/news/2013-01-airways-notch-bronchial-cell-fates.html Medical research Tue, 22 Jan 2013 07:31:21 EST news278062267 Researchers at Boston Children's Hospital have found that microscopic particles containing proteins and nucleic acids called exosomes could potentially protect the fragile lungs of premature babies from serious lung diseases and chronic lung injury caused by inflammation. http://medicalxpress.com/news/2012-10-microscopic-packets-stem-cell-factors.html Medical research Wed, 31 Oct 2012 16:36:24 EST news270920175 Cancer researchers have known for well over a century that different tumor types spread only to specific, preferred organs. But no one has been able to determine the mechanisms of organ specific metastasis, the so-called "soil and seed" theory of 1889. New details that could help shed light on this hypothesis have been provided by a team of researchers from Weill Cornell Medical College, Memorial Sloan-Kettering Cancer Center, and their collaborators, proposing a new mechanism controlling cancer metastasis that offers fresh diagnostic and treatment potential. http://medicalxpress.com/news/2012-05-cancerous-tumors-pro-metastatic-secreted-vesicles.html Cancer Tue, 29 May 2012 12:35:50 EST news257513741