Antimycobacterial natural products from Moroccan medicinal plants: Chemical composition, bacteriostatic and bactericidal profile of Thymus satureioides and Mentha pulegium essential oils

In infectiology, some essential oils (EOs) are able to competewith antibiotic therapy and even surpass it; it is in this context that a study of the chemical composition and the antibacterial power of the EOs of three aromatic and widely used medicinal plants in traditional medicine was conducted which are Satureja calamintha subsp. nepeta (L.) Briq, Lavandula multifida L., and Mentha pulegium L. The extracted EO yields were of the order of 2.6%, 0.12%, and 5.29% for Satureja calamintha, Lavandula multifida, and Mentha pulegium, respectively. The obtained EOs were analyzed by gas chromatography coupled with mass spectrometry (GC/MS). The results of these analyses showed that Lavandula multifida contains carvacrol as a majority compound (70.65%); by contrast, the pulegone is the majority compound of Satureja calamintha and Mentha pulegium that contain about 87.04% and 71.97%, respectively. The EOs with the pulegone as predominant compound (Mentha pulegium and Satureja calamintha) showed higher antibacterial activity when tested against some multiresistant strains, compared to those with the carvacrol as major compound. In conclusion, this study may open up prospects for the formulation of phytomedicines against resistant and nonresistant bacteria incriminated in nosocomial infections.

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Extraction of Essential Oils from Medicinal Plants and their Utilization as Food Antioxidants

Current Pharmaceutical Design ◽

10.2174/1381612826666200121092018 ◽

2020 ◽

Vol 26 (5) ◽

pp. 519-541 ◽

Cited By ~ 3

Author(s):

Giovanna Ferrentino ◽

Ksenia Morozova ◽

Christine Horn ◽

Matteo Scampicchio

Keyword(s):

Chemical Composition ◽

Medicinal Plants ◽

Beneficial Effect ◽

Essential Oils ◽

Bioactive Compounds ◽

Antimicrobial Properties ◽

Food Products ◽

Human Diseases ◽

Present Review ◽

Green Technologies

Background: The use of essential oils is receiving increasing attention worldwide, as these oils are good sources of several bioactive compounds. Nowadays essential oils are preferred over synthetic preservatives thanks to their antioxidant and antimicrobial properties. Several studies highlight the beneficial effect of essential oils extracted from medicinal plants to cure human diseases such as hypertension, diabetes, or obesity. However, to preserve their bioactivity, the use of appropriate extraction technologies is required. Method: The present review aims to describe the studies published so far on the essential oils focusing on their sources and chemical composition, the technologies used for their recovery and their application as antioxidants in food products. Results: The review has been structured in three parts. In the first part, the main compounds present in essential oils extracted from medicinal plants have been listed and described. In the second part, the most important technologies used for extraction and distillation, have been presented. In detail, conventional methods have been described and compared with innovative and green technologies. Finally, in the last part, the studies related to the application of essential oils as antioxidants in food products have been reviewed and the main findings discussed in detail. Conclusions: In summary, an overview of the aforementioned subjects is presented by discussing the results of the most recent published studies.

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Chemical composition, antimicrobial activity and biological properties of essential oils

International Journal of Life Sciences ◽

10.3126/ijls.v9i2.12043 ◽

2015 ◽

Vol 9 (2) ◽

pp. 9-13 ◽

Cited By ~ 2

Author(s):

Amir Hossein Saeidnejad ◽

Peyman Rajaei

Keyword(s):

Chemical Composition ◽

Medicinal Plants ◽

Essential Oil ◽

Essential Oils ◽

Antimicrobial Properties ◽

Biological Properties ◽

Antioxidant Agents ◽

Ancient Times ◽

High Concentrations ◽

Oil Repellent

Essential oils constitute a heterogeneous collection of chemical compounds. Their main characteristics are that they all synthesized by plants and are volatile and mostly soluble in ethanol. They have traditionally been obtained from plants and they have been widely used for insecticidal, medicinal and cosmetic purposes. Essential oils contains about 20–60 components at quite different concentrations and they are characterized by two or three major components at fairly high concentrations. Lately, the essential oils and various extracts of plants have gained special interest as sources of natural antimicrobial and antioxidant agents because of the resistance to antibiotics that some microorganisms have acquired and the possible toxicities of the synthetic antioxidants. Spices consumed daily in different types of food to improve flavors, since ancient times, are well known for their antioxidant and antimicrobial properties. During recent decades, numerous numbers of plants have been monitored for their possible role as repellents and insecticides. In this review, the chemical composition profile of some important medicinal plants was evaluated, then antimicrobial properties of a number of essential oils was compared. Antioxidant activity of some essential oils was also considered. Finally, essential oil repellent properties an an important characteristics was evaluated. Further investigation for available data related to the other biological properties of medicinal plants essential oil is recommended.DOI: http://dx.doi.org/10.3126/ijls.v9i2.12043 International Journal of Life Sciences 9 (2) : 2015; 9-13

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Pharmacology and Phytochemistry of Ecuadorian Medicinal Plants: An Update and Perspectives

Pharmaceuticals ◽

10.3390/ph14111145 ◽

2021 ◽

Vol 14 (11) ◽

pp. 1145

Author(s):

Chabaco Armijos ◽

Jorge Ramírez ◽

Melissa Salinas ◽

Giovanni Vidari ◽

Alírica I. Suárez

Keyword(s):

Chemical Composition ◽

Medicinal Plants ◽

Secondary Metabolites ◽

Essential Oils ◽

Volatile Compounds ◽

Biological Activities ◽

Indigenous Communities ◽

Therapeutic Agents ◽

Practical Applications ◽

Pharmacological Studies

The use of plants as therapeutic agents is part of the traditional medicine that is practiced by many indigenous communities in Ecuador. The aim of this study was to update a review published in 2016 by including the studies that were carried out in the period 2016–July 2021 on about 120 Ecuadorian medicinal plants. Relevant data on raw extracts and isolated secondary metabolites were retrieved from different databases, resulting in 104 references. They included phytochemical and pharmacological studies on several non-volatile compounds, as well as the chemical composition of essential oils (EOs). The tested biological activities are also reported. The potential of Ecuadorian plants as sources of products for practical applications in different fields, as well the perspectives of future investigations, are discussed in the last part of the review.

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Potentially Effective and Safe Anti-Helicobacter pylori Natural Products: Chemometric Study

Revista de Chimie ◽

10.37358/rc.20.6.8192 ◽

2020 ◽

Vol 71 (6) ◽

pp. 267-273 ◽

Cited By ~ 1

Author(s):

Branislava D. Kocic ◽

Dobrila M. Stankovic Dordevic ◽

Marija V. Dimitrijevic ◽

Marija S. Markovic ◽

Dragoljub L. Miladinovic

Keyword(s):

Helicobacter Pylori ◽

Antibacterial Activity ◽

Natural Products ◽

Chemical Composition ◽

Essential Oils ◽

Principal Component ◽

Synergistic Activity ◽

Agglomerative Hierarchical Clustering ◽

Naturally Occurring ◽

H Pylori

The susceptibility of Helicobacter pylori to three essential oils (EOs), 12 naturally occurring monoterpene hydrocarbons, oxygenated and phenolic monoterpenes and three reference antibiotics were studied. Classification and comparison of essential oils and monoterpenes on the basis of their chemical composition and antibacterial activity were made by the utilization of principal component analyses (PCA) and agglomerative hierarchical clustering (AHC). The most abundant compound in the Thymus glabrescens Willd. and Thymus pulegioides L. EOs is geraniol (33.8% and 52.5%), while the main constituent in Satureja kitaibelii Wierzb. ex Heuff. EO is limonene (16,1%). The compound that was the most active against H. pylori was carvacrol. EOs of T. glabrescens and S. kitaibelii exhibit higher antibacterial ability in comparison with all monoterpenes, except carvacrol, probably based on the concept of synergistic activity of essential oil components. PCA separated essential oils based on chemical composition and explain 96.5% of the total variance in the first two principal components. Essential oils, phenolic monoterpenes and two antibiotics were classified in the same sub-cluster within AHC analyses. EOs of T. glabrescens and S. kitaibelii can be used to treat infections caused by H. pylori, as a potentially effective, cheap and safe natural products. Further research of antibacterial activity of selected monoterpenes, essential oils and standard antibiotic combinations, as well as clinical study are required.

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