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Effects of Chronic Exposure to Crack Cocaine on the Respiratory Tract of Mice

Smoked cocaine (crack cocaine) causes several forms of injury to the respiratory tract, including asthma exacerbations, lung edema and hemorrhage, and nasal mucosal alterations. Few studies, however, have assessed respiratory tract pathology in habitual users of crack cocaine. Here, we describe the...

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Published in:Toxicologic pathology 2009-04, Vol.37 (3), p.324-332
Main Authors: Herculiani, Percyleine P., Pires-Neto, Ruy C., Bueno, Heloisa M. S., Zorzetto, Júlio C., Silva, Luiz C., Santos, Ángela B. G., Garcia, Raphael C. T., Yonamine, Mauricio, Detregiachi, Cláudia R. P., Saldiva, Paulo H. N., Mauad, Thais
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container_title Toxicologic pathology
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creator Herculiani, Percyleine P.
Pires-Neto, Ruy C.
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Garcia, Raphael C. T.
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Detregiachi, Cláudia R. P.
Saldiva, Paulo H. N.
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description Smoked cocaine (crack cocaine) causes several forms of injury to the respiratory tract, including asthma exacerbations, lung edema and hemorrhage, and nasal mucosal alterations. Few studies, however, have assessed respiratory tract pathology in habitual users of crack cocaine. Here, we describe the histological alterations in the respiratory tract of mice caused by chronic inhalation of crack cocaine. Twenty 2-month-old BALB/c mice were exposed to the smoke of 5 g crack cocaine in an inhalation chamber once a day for two months and compared to controls (n = 10). We then morphometrically analyzed nose and bronchiolar epithelial alterations, bronchiolar and alveolar macrophage cell density, alveolar hemosiderin content, and in addition determined the vasoconstriction index and the wall thickness of pulmonary arteries. The serum cocaine level was 212.5 ng/mL after a single inhalation. The mucus content of the nasal epithelium increased in crack-exposed animals, and the nasal and bronchial epithelium thickness decreased significantly. The alveolar hemosiderin content and the alveolar and bronchiolar macrophage cell density increased in animals exposed to crack. The vasoconstriction index increased in the pulmonary arteries of the exposed group. Chronic crack cocaine inhalation causes extensive histological changes along the entire respiratory tract.
doi_str_mv 10.1177/0192623308330790
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identifier ISSN: 0192-6233
ispartof Toxicologic pathology, 2009-04, Vol.37 (3), p.324-332
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1533-1601
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source Sage Journals Online
subjects Administration, Inhalation
Alcian Blue - metabolism
Animals
Biological and medical sciences
Bronchioles - drug effects
Coloring Agents - metabolism
Crack Cocaine - administration & dosage
Crack Cocaine - blood
Crack Cocaine - pharmacology
Crack Cocaine - toxicity
Drug addictions
Epithelial Cells - drug effects
Hemosiderin - analysis
Immunohistochemistry
Inhalation Exposure - adverse effects
Macrophages, Alveolar - chemistry
Macrophages, Alveolar - drug effects
Male
Medical sciences
Mice
Mice, Inbred BALB C
Nose - drug effects
Periodic Acid-Schiff Reaction - methods
Respiratory System - drug effects
Toxicity Tests, Chronic
Toxicology
title Effects of Chronic Exposure to Crack Cocaine on the Respiratory Tract of Mice
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