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Large amounts of tear gas have been used in densely populated cities, including Cairo, Istanbul, Rio de Janeiro, Manama (Bahrain), and Hong Kong. In the United States, tear gas was used extensively during recent riots in Ferguson, Missouri. Whereas tear gas deployment systems have rapidly improved\u2014with aerial drone systems tested and requested by law enforcement\u2014epidemiological and mechanistic research have lagged behind and have received little attention. Case studies and recent epidemiological studies revealed that tear gas agents can cause lung, cutaneous, and ocular injuries, with individuals affected by chronic morbidities at high risk for complications. Mechanistic studies identified the ion channels TRPV1 and TRPA1 as targets of capsaicin in pepper spray, and of the tear gas agents chloroacetophenone, CS, and CR. TRPV1 and TRPA1 localize to pain\u2010sensing peripheral sensory neurons and have been linked to acute and chronic pain, cough, asthma, lung injury, dermatitis, itch, and neurodegeneration. In animal models, transient receptor potential inhibitors show promising effects as potential countermeasures against tear gas injuries. On the basis of the available data, a reassessment of the health risks of tear gas exposures in the civilian population is advised, and development of new countermeasures is proposed.<\/jats:p>","DOI":"10.1111\/nyas.13141","type":"journal-article","created":{"date-parts":[[2016,7,8]],"date-time":"2016-07-08T19:47:46Z","timestamp":1468007266000},"page":"96-107","source":"Crossref","is-referenced-by-count":57,"title":["Tear gas: an epidemiological and mechanistic reassessment"],"prefix":"10.1111","volume":"1378","author":[{"given":"Craig","family":"Rothenberg","sequence":"first","affiliation":[{"name":"Department of Global Environmental Health Sciences Tulane University School of Public Health and Tropical Medicine  New Orleans Louisiana"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satyanarayana","family":"Achanta","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology Duke University School of Medicine  Durham North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erik R.","family":"Svendsen","sequence":"additional","affiliation":[{"name":"Division of Environmental Health, Department of Public Health Sciences Medical University of South Carolina  Charleston South Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sven\u2010Eric","family":"Jordt","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology Duke University School of Medicine  Durham North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,7,8]]},"reference":[{"key":"e_1_2_11_2_1","unstructured":"AFP.2013. 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