Browsing by Author "Shahira M. Ezzat"

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A comparative UPLC‑orbitrap‑MS‑based metabolite profiling of three Pelargonium species cultivated in Egypt
(Springer Nature, 2024-10-01) Rana M. Merghany; Mohamed A. Salem; Shahira M. Ezzat; Sherifa F. A. Moustafa; Salma A. El‑Sawi; Meselhy R. Meselhy
Several Pelargonium species are cultivated mainly to produce essential oils used in perfume industry and for ornamental purposes. Although the chemical composition and biological activities of their essential oils were extensively investigated, there is limited information about the chemical composition of their non-volatile constituents. In this study, we report an Ultra-Performance Liquid Chromatography-Mass Spectrometry (UPLC-MS)-based metabolomics approach for the annotation and analysis of various metabolites in three species; P. graveolens, P. denticulatum, and P. fragrans utilizing The Global Natural Product Social Molecular Networking (GNPS) and multivariate data analyses for clustering of the metabolites. A total of 154 metabolites belonging to different classes were annotated. The three species are good sources of coumarins, benzoic acid derivatives, organic acids, fatty acids, and phospholipids. However, the highest level of flavonols (mono- and di-O-glycosides) and cinnamic acid derivatives was found in P. graveolens and P. denticulatum, whereas tannins and flavone C-glycosides were abundant in P. fragrans. The metabolic profiles clarified here provide comprehensive information on the non-volatile constituents of the three Pelargonium species and can be employed for their authentication and possible therapeutic applications.
A comprehensive review of natural compounds and their structure–activity relationship in Parkinson’s disease: exploring potential mechanisms
(Springer Nature, 2024-10-11) Rana M. Merghany; Salma A. El‑Sawi; Asmaa F. Aboul Naser; Shahira M. Ezzat; Sherifa F. A. Moustafa; Meselhy R. Meselhy
Parkinson’s disease (PD) is a neurodegenerative disorder characterized by the progressive loss of dopamine-producing cells in the Substantia nigra region of the brain. Complementary and alternative medicine approaches have been utilized as adjuncts to conventional therapies for managing the symptoms and progression of PD. Natural compounds have gained attention for their potential neuroprotective effects and ability to target various pathways involved in the pathogenesis of PD. This comprehensive review aims to provide an in-depth analysis of the molecular targets and mechanisms of natural compounds in various experimental models of PD. This review will also explore the structure–activity relationship (SAR) of these compounds and assess the clinical studies investigating the impact of these natural compounds on individuals with PD. The insights shared in this review have the potential to pave the way for the development of innovative therapeutic strategies and interventions for PD.
Clinical uses of cannabis and Catha edulis products
(Elsevier, 2024-01-01) Shahira M. Ezzat; Passent M. Abdel Baki; Rana M. Ibrahim; Doaa Abu Elezz; Mahmoud Abdelaziz; Mohamed A. Salem
The medicinal use of cannabis (Cannabis sativa) and khat (Catha edulis) as well as their products has been increased in the last decade. Medical cannabis and khat have been legalized in several countries. Additionally, the major cannabinoids, particularly cannabidiol and tetrahydrocannabinol, have been utilized for the development of FDA-approved pharmaceuticals. The clinical applications of cannabis and C. edulis products are complicated by legislation and regulations that are varied among countries. In this chapter, the pharmacological and the side effect profiles for the clinical uses of cannabis and C. edulis products are highlighted. Although, the clinical data for their use are continuing to evolve, the legal status needs to be authorized to keep the balance between clinical applications and limitations.
Extraction and isolation of cannabinoids
(Elsevier, 2024-01-01) Mohamed A. Salem; Rana M. Ibrahim; Passent M. Abdel Baki; Sohila M. Osman; Shahira M. Ezzat
Cannabis sativa L. is one of the most important medicinal plants that belongs to the family Cannabaceae. C. sativa is a herbaceous flowering plant that is indigenous to eastern Asia, but it is now cultivated worldwide due to the importance of its active constituents known as cannabinoids. Due to the growing interest in these compounds, various methods for their extraction and isolation were proposed. In this chapter, we will have an overview about the conventional and nonconventional methods for extraction of cannabinoids both from plant material and from biological samples for forensic purposes. Also we will review the methods for isolation of such compounds from different types of extracts as well as the modern methods for metabolomics and chemometric tools for analysis of cannabinoids.