Evaluation of the nasal cavity mice submitted to the inhalation exposure to the herbicide 2,4- dichlorophenoxyacetic acid
DOI:
https://doi.org/10.11606/issn.2176-7262.v51i4p247-253Keywords:
2,4-Dichlorophenoxyacetic Acid, Inflammation, Mast cellsAbstract
In the last year, Brazil presented a 190% increase in the use of agrochemicals, which implies a serious public health problem. 2,4-Dichlorophenoxyacetic acid has toxicological classification I (extremely toxic) and because it is very volatile, it favors the contamination of soils, water, animals and humans. Study model: Experimental study. Objective: To analyze the inflammatory infiltrate of mice submitted to acute nebulization to the 2.4-dichlorophenoxyacetic acid herbicide at different time intervals and concentrations. Methods: Eighty Swiss male mice were divided into four groups (n=20): saline, low (3.71 x 10-3 grams of active ingredient per hectare), medium (6.19 x 10-3 grams of active ingredient per hectare) and high concentration (9.28 x 10-3 grams of active ingredient per hectare). All animals were exposed to the nebulizations proposed for each group, for 15 minutes, at different time intervals: 24, 48, 72 and 192 hours. The exposure protocol had two boxes attached to an ultrasonic nebulizer and the nasal vestibule of each animal was removed after euthanasia for histological analysis. Results: The mast cell count showed significantly increased values in the high concentration group, in the time interval of 48 hours, when compared to the 24-hour period. Conclusion: The results showed that the acute exposure to the herbicide 2,4-dichlorophenoxyacetic acid increases the production of mast cells in the nasal cavity of animals exposed to high concentrations, which may be related to the appearance of allergic reactions.
Downloads
Downloads
Published
Issue
Section
License