Objetivo: Determinar los efectos que pueden ocasionar los ácidos grasos constituyentes del aceite y/o grasa denominada comercialmente "Light" sobre el tejido adiposo, hepático e intestinal y las posibles alteraciones enzimáticas a nivel hepático en ratas albinas.
Diseño: Estudio prospectivo, longitudinal, experimental aleatorizado.
Materiales y Métodos: Realizado en 30 ratas machos raza Wistar de 21 días de edad, distribuidas en tres grupos al azar. El grupo (A) recibió una dieta con 33% de ácidos grasos provenientes de un Aceite Vegetal, el grupo (B) recibió 33% de un Aceite “Light” y el grupo (C) recibió 33% de ácidos grasos presentes en Margarina “Light”.
Resultados: El peso de las ratas se incremento durante todo el experimento (Grupo A 593%, Grupo B 586%, Grupo C 624%). La composición corporal del grupo C (alimentado con margarina “Light”) registro un alto contenido de agua 146%, bajo contenido de proteínas 17,74 % y bajo contenido de lípidos 12,05% en comparación con los grupos A y B
La actividad enzimática de la Piruvato kinasa (E.C. 2.7.1.40) y la de Glucosa 6-fosfato deshidrogenasa (E.C. 1.1.1.49) en el grupo C se incremento en 0,8 u/g en relación al grupo A. El nivel de Lactato deshidrogenasa (E.C. 1.1.1.27) disminuyo en el grupo C (438,7 u/g) y la 6-Fosfogluconatodeshidrogenasa (E.C. 1.1.1.41) se incremento en el grupo B (1,3 u/g). Los niveles de peroxidación lipídica del grupo C registraron un incremento de 117.96% de nivel de lipoperoxidación al ser comparados con el grupo A (100%) y B (104.63%)
La concentración de proteínas hepáticas se incremento en el grupo B (0,86 g/dL)
En el tejido hepático del grupo C se observó menor volumen individual del hepatocito con un alto grado de infiltración acuosa, anisonucleosis, poiquilonucleosis e infiltración grasa.
El tejido adiposo presento mayor volumen individual.
En el tejido intestinal las células de paneth y las células cilíndricas perdieron su forma habitual y mayor deterioro histológico al ser comparado con los grupos A y B.
Conclusiones: Ratas alimentadas con dietas que incluían ácidos grasos provenientes de la grasa tipo Margarina Vegetal “Light”, presentaron trastornos en la composición corporal, variaciones en las concentraciones enzimáticas, peroxidación lipídica y cambios morfológicos en el tejido. / Objective: To determine the effects caused by fatty acids comprised in oil and fats commercially designated as “light” on adipose, liver, and intestinal tissue of Albino rats, as well as possible liver enzyme alterations in these animals.
Design: Prospective, longitudinal, experimental, and randomized study.
Materials and Methods: The study was performed in 30 Wistar male rats, 21 days old, who were randomly assigned to one of three groups. The animals in group (A) received a diet comprising a 33% fatty acid content from vegetable oils, Group (B) received the same fatty acid content from a “light” oil, and Group (C) received a 33% fatty acid content from “light” margarine.
Results: Weights of the animals increased during the whole experiment (Group A, 593%; Group B, 586%; and Group C, 624%). Body composition of animals in Group C (fed with “light” margarine) revealed a high water content, 146%; low protein content, 17,74 %, and a low lipid content, 12,05% compared to body composition in groups A and B.
Pyruvate kinase enzyme activity (E.C. 2.7.1.40) and that of glucose 6-phosphate dehydrogenase (E.C. 1.1.1.49) in Group C had a 0,8 u/g improvement compared to Group A. Lactate dehydrogenase levels (E.C. 1.1.1.27) was reduced in Group C (438,7 u/g), and 6-phosphogluconatedehydrogenase levels (E.C. 1.1.1.41) increased in Group B (1,3 u/g). Lipid peroxidation in Group C animals had a 117.96% increase when compared to those of Group A (100%) and B (104.63%).
Liver protein concentrations were increased in Group B (0,86 g/dL)
Liver tissues of Group c animals had lower individual hepatocyte volumes, with a high degree of water infiltration, and isonucleosis, poikilonucleosis and fat infiltration.
Adipose tissue had a higher individual volume.
In intestinal tissues from Group C animals, both Paneth and cylinder-shaped cells lost their usual appearance, and they had more histological deterioration compared to intestinal cells from Groups A and B animals.
Conclusions: Rats fed with diets including fatty acids from “light” vegetable margarine had alterations in their body composition, they also had variations in enzyme concentrations and lipid peroxidation, as well as morphological changes in liver, adipose, and
| Identifer | oai:union.ndltd.org:Cybertesis/oai:cybertesis.unmsm.edu.pe:cybertesis/1859 |
| Date | January 2007 |
| Creators | Villanueva Coz, Maria Virginia Del Pilar |
| 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/bacherlorThesis |
| Source | Universidad Nacional Mayor de San Marcos, Repositorio de Tesis - UNMSM |
| Rights | info:eu-repo/semantics/openAccess |
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