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Marjoram Essential Oil – Two Studies Note Its Protective Effects

Protective effect of volatile oil, alcoholic and aqueous extracts of Origanum majorana (Sweet Marjoram) on lead acetate toxicity in mice. (Ed. Note: The ‘volatile oil’ is Marjoram Essential Oil)el-Ashmawy IM, el-Nahas AF, Salama OM.Department of Pharmacology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt. Natural dietary antioxidants are extensively studied for their ability to protect [...]

Protective effect of volatile oil, alcoholic and aqueous extracts of Origanum majorana (Sweet Marjoram) on lead acetate toxicity in mice. (Ed. Note: The ‘volatile oil’ is Marjoram Essential Oil)

el-Ashmawy IM, el-Nahas AF, Salama OM.
Department of Pharmacology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt.

Natural dietary antioxidants are extensively studied for their ability to protect cells from miscellaneous damages. Origanum majorana L., Lamiaceae, is a potent antioxidant. The effect of administration of O. majorana (volatile oil, alcoholic and aqueous extracts) on oral administration of lead acetate in the diet of mice at concentration 0.5% (W/W) for one month were studied by measuring serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), urea and creatinine, histopathological changes of the liver and kidney and genotoxicity including, rate of micronucleus and chromosomal aberrations in bone marrow cells. Mice were treated with the 3 different forms of O. majorana, one month before and maintained with lead acetate administration. The 3 forms of O. majorana induced a significant decrease in serum activities of transaminases (AST & ALT), ALP, urea and creatinine and improved the liver and kidney histology in comparison with lead acetate treated group. Alcoholic extracts of O. majorana significantly reduced the rate of micronucleus, number of aberrant cells and different kinds of chromosomal aberrations. Volatile oil extract (essential oil) significantly reduced the rate of micronucleus and chromosomal fragments. Aqueous extract and volatile oil also of O. majorana significantly reduced number of gaps, ring chromosome and stickiness. It could be concluded that O. majorana plays an important role in ameliorating liver and kidney functions and genotoxicity induced by lead toxicity.

Effects of marjoram volatile oil (again, Marjoram essential oil) and grape seed extract on ethanol toxicity in male rats.

El-Ashmawy IM, Saleh A, Salama OM.
Department of Pharmacology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt.

Natural dietary antioxidants are extensively studied for their ability to protect cells from miscellaneous damages. Marjoram volatile oil (Origanum majorana L., Lamiaceae) and grape seed extract (Vitis vinifera L., Vitaceae) are potent antioxidants. Effects of administration of marjoram volatile oil or grape seed extract on oral administration of ethanol, simultaneously, daily for 10 weeks were studied through determining epididymal spermatozoal analysis, serum testosterone level, weight and histopathological examination of testis, liver and brain. Glutathione level and lipid peroxidation content as malondialdehyde in the testis, liver and brain were measured. The repeated intake of a great amount of ethanol (10 ml/kg body weight, 25% v/v) was followed by fertility disturbances with low sperm count, impaired sperm motility and decrease in serum testosterone level. Moreover, ethanol toxicity induced significant alterations in the histological structures of the testis, liver and brain. The results revealed a significant increase in lipid peroxidation and decrease in the level of glutathione in the testis, liver and brain in the ethanol-treated group. However, co-administration of the extracts of protective plants resulted in minimizing the hazard effects of ethanol toxicity on male fertility, liver and brain tissues. It may be concluded that marjoram volatile oil (essential oil) and grape seed extract are useful herbal remedies, especially for controlling oxidative damages.

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