El estrés oxidativo genera diversas enfermedades inflamatorias con carcinogénesis y muerta celular. Luma chequen (Molina) A. Gray es una especie nativa con virtudes antiinflamatorias, antimicrobianas y conservante de tejidos postmortem. Con el objetivo de caracterizar la composición química y determinar la actividad antioxidante del aceite esencial de L. chequen, se realizó el presente trabajo. El aceite esencial reporta un rendimiento (1.25%v/p), rotación óptica (+6 a -8), densidad (0.9044) e índice de refracción (1.470). Por CG-SM y RMN-13C se elucidó las estructuras de 40 compuestos al 93.6% de la muestra total: hidrocarburos monoterpénicos (68.8%), conteniendo a-pineno (57.3%) y b-pineno (6.2%); hidrocarburos oxigenados (18.9%), destacando 1,8 cineol (7.5%), linalol (3.7%) y trans-verbenol (2.2%); sesquiterpenos (3.0%), con el b-selineno (1.3%) y óxido de b-cariofileno (0.9%); y fracción no terpénica (3.0%). Se ensayó en 3 modelos la actividad antioxidante: 1) En el modelo DPPH, resultó muy cercano a la vitamina C, captando al radical DPPH en 63.5600% y la vitamina C en 69.7767%; tiene una concentración media (IC50) de 43.3571 ug/mL y la vitamina C de 36.4090 ug/mL; 2) la captación de radical hidroxilo a concentraciones de 100, 50 y 10 ug/mL, resultan en 67.2033, 51.9633 y 31.2767%, respectivamente; a mayor concentración de aceite hay mayor capacidad antioxidante; y 3) inhibe la formación del complejo malondialdehido-ácido tiobarbitúrico en 0.117 Umoles/mL y la vitamina C 0.103 Umoles/mL, comparando con el control negativo que exhibe 0.540 Umoles/mL; el aceite esencial resulta con menor capacidad antioxidante en este modelo. La dosis letal media (DL50), ensayados en ratones albinos, del aceite es 906.1140 mg/kg; su CL50 es 28.9013 ug/mL, ensayados en Artemia salina Leach. Los resultados, sugieren que el aceite esencial de L. chequen posee actividad antioxidante, debido a la estructura de sus constituyentes químicos. / --- Oxidative stress generates several inflammatory diseases with cell death and carcinogenesis . Luma chequen (Molina) A. Gray is a native specie with anti-inflammatory and antimicrobial virtues and corpse (post mortem tissue ) preservative .With the goal of characterizing the chemical composition and determining antioxidant activity of essential oil of L. chequen, it was carried out the present work .The essential oil reports a ( 1.25 % v/p ) performance, (+6 a -8) optical rotation , (0.9044 g/mL) density and a (1.470) refraction index. By means of CS-SM and RMC-13C, it was elucidated the structures of 40 compounds at a 93.6 % of the whole sample, monoterpenic hydrocarbons (68.8 %), containing a-pinene (57.3 %) and b-pinene (6.2 %) oxygenated hydrocarbons (18.9 %), emphasizing 1,8 cineol (7.5 %), linalool (3.7 %), and trans-verbenol (2.2 %), sesquiterpenes (3.0 %), with b-selinene (1.3% ) and b-cariofilene oxide (0.9%), and a non terpenic fraction (3.0%). It was assayed 3 models of antioxidant activity, 1) resulted very near to vitamin C, gaining over of the DPPH radical in 63.5600% and the vitamin C in 69.7767%, it has an CI50 of 43.3571 ug/mL and the vitamin C of 36.4090 ug/mL, 2) the winning of hydroxyl radical at concentrations of 100, 50, and 10 ug/mL, resulting in 67.2033 and 31.2767%, respectively, at a greater concentration of oil, there is a greater antioxidant capacity and 3) it Inhibits the formation of malondialdehyde-thiobarbituric acid complex in 0.117 Umols/mL an the vitamin C, 0.103 Umols/mL, comparing with negative control that exhibits 0.540 Umols/mL; essential oil results with minor antioxidant capacity in this model. LD50 of the oil is 906.1140 mg/kg that was assayed in albine mice; Its LC50 is 28.9013 ug/mL, that was assayed in Artemia salina Leach. The results suggest that the essential oil of L. chequen has antioxidant activity, due to structure of their chemical constituent .
| Identifer | oai:union.ndltd.org:Cybertesis/oai:cybertesis.unmsm.edu.pe:cybertesis/3285 |
| Date | January 2006 |
| Creators | Carhuapoma Yance, Mario |
| Publisher | Universidad Nacional Mayor de San Marcos |
| Source Sets | Universidad Nacional Mayor de San Marcos - SISBIB PERU |
| Language | Spanish |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Source | Universidad Nacional Mayor de San Marcos, Repositorio de Tesis - UNMSM |
| Rights | info:eu-repo/semantics/openAccess |
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