Ophthalmological pre-clinical research about essential oil from the Origanum vulgare L., Lamiaceae

ABSTRACT Objective: To evaluate acute eye irritation in rabbits following topical administration of essential oil. Methods: animals were divided into three groups, each containing three rabbits, with a total of 6 eyes per group. The difference between them was the concentration used (1, 3 and 9%). A...

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Hauptverfasser: Oliveira, Jana Luiza Toscano Mendes de, Alves, Adriano Francisco, Araujo, Maria Carmem Toscano Tavares de, Oliveira Junior, Walter Mendes de, Rodrigues, Luiza Toscano Dias, Diniz, Margareth de Fátima Formiga Melo
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creator Oliveira, Jana Luiza Toscano Mendes de
Alves, Adriano Francisco
Araujo, Maria Carmem Toscano Tavares de
Oliveira Junior, Walter Mendes de
Rodrigues, Luiza Toscano Dias
Diniz, Margareth de Fátima Formiga Melo
description ABSTRACT Objective: To evaluate acute eye irritation in rabbits following topical administration of essential oil. Methods: animals were divided into three groups, each containing three rabbits, with a total of 6 eyes per group. The difference between them was the concentration used (1, 3 and 9%). A single dose of 0.1 ml of the product was applied into the conjunctival sac of one eye of the animal, and the contralateral eye was used as control. The effects caused by the essential oil in the conjunctiva, iris and cornea were analyzed after 1, 24, 48 and 72 hours and at the end of the seventh day after topical application. Ophthalmologic evaluations were performed with the aid of a binocular indirect ophthalmoscope fluorescein and with and without the observed responses, before being graded according to the Draize scale. Pathological examinations were performed on all eyes studied at the end of the experiment. Results: in the group of animals subjected to the ocular instillation of 1% essential oil, there was no change. For treatment with 3% oil, conjunctival changes were found to be decreasing during the examination after 1 hour. Administration of the 9%essential oil induced conjunctival injection, without any change in the other ophthalmologic evaluation times. Conclusion: the evaluation contributed to meet the clinical changes in the ocular surface. Thus, it was possible to classify the oil at 1% as non-irritating and the concentration of 3% and 9 as mildly irritating, making it possible for clinical studies to establish the oil as an alternative therapy in bacterial conjunctivitis.
doi_str_mv 10.6084/m9.figshare.19928616
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Methods: animals were divided into three groups, each containing three rabbits, with a total of 6 eyes per group. The difference between them was the concentration used (1, 3 and 9%). A single dose of 0.1 ml of the product was applied into the conjunctival sac of one eye of the animal, and the contralateral eye was used as control. The effects caused by the essential oil in the conjunctiva, iris and cornea were analyzed after 1, 24, 48 and 72 hours and at the end of the seventh day after topical application. Ophthalmologic evaluations were performed with the aid of a binocular indirect ophthalmoscope fluorescein and with and without the observed responses, before being graded according to the Draize scale. Pathological examinations were performed on all eyes studied at the end of the experiment. Results: in the group of animals subjected to the ocular instillation of 1% essential oil, there was no change. For treatment with 3% oil, conjunctival changes were found to be decreasing during the examination after 1 hour. Administration of the 9%essential oil induced conjunctival injection, without any change in the other ophthalmologic evaluation times. Conclusion: the evaluation contributed to meet the clinical changes in the ocular surface. 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For treatment with 3% oil, conjunctival changes were found to be decreasing during the examination after 1 hour. Administration of the 9%essential oil induced conjunctival injection, without any change in the other ophthalmologic evaluation times. Conclusion: the evaluation contributed to meet the clinical changes in the ocular surface. 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For treatment with 3% oil, conjunctival changes were found to be decreasing during the examination after 1 hour. Administration of the 9%essential oil induced conjunctival injection, without any change in the other ophthalmologic evaluation times. Conclusion: the evaluation contributed to meet the clinical changes in the ocular surface. Thus, it was possible to classify the oil at 1% as non-irritating and the concentration of 3% and 9 as mildly irritating, making it possible for clinical studies to establish the oil as an alternative therapy in bacterial conjunctivitis.</abstract><pub>SciELO journals</pub><doi>10.6084/m9.figshare.19928616</doi><oa>free_for_read</oa></addata></record>
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Ophthalmology
title Ophthalmological pre-clinical research about essential oil from the Origanum vulgare L., Lamiaceae
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