Structural Characterization, Antioxidant, Antidiabetic and Antimicrobial Activities of Citrus Limettarisso, Citrus Nobilis X Citrus Deliciosa and Citrus Maxima
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Abstract
Background: The pharmacological properties of citrus fruits have long been recognized in traditional medicine, with recent scientific studies corroborating their potential as sources of natural bioactive compounds. Citrus limettarisso, Citrus nobilis x Citrus deliciosa, and Citrus maxima, in particular, have garnered attention for their antioxidant, antidiabetic, and antimicrobial properties. Prior research has highlighted these species' capabilities, with various studies reporting on their significant health benefits.
Objective: This study aims to evaluate and compare the antioxidant, antidiabetic, and antimicrobial activities of essential oils extracted from the peels of Citrus limettarisso, Citrus nobilis x Citrus deliciosa, and Citrus maxima, thereby contributing to the understanding of their potential therapeutic applications.
Methods: Essential oils were extracted from the peels of the three citrus species using hydro distillation. The antioxidant activity was assessed through Total Phenolic Content (TPC), Total Flavonoid Content (TFC), and DPPH Radical Scavenging Assay. Antiglycation potential and alpha-amylase inhibition were evaluated for antidiabetic properties, while antimicrobial activity was determined using the Agar Well Diffusion Method.
Results: Citrus limettarisso showed the highest TPC (301.4474 ± 2.930402 mg GAE/100g) and significant antioxidant activity (68.26347% DPPH scavenging). Citrus maxima exhibited a high TFC (143.8727 ± 5.454545 mg CE/100g) but lower TPC (115.8333 ± 3.553444 mg GAE/100g). Citrus nobilis x Citrus deliciosa demonstrated considerable TPC (244.1667 ± 5.862774 mg GAE/100g) and TFC (50.17576 ± 0.457566 mg CE/100g). Antiglycation and alpha-amylase inhibition assays revealed Citrus limettarisso as the most potent antidiabetic agent with the highest inhibition percentages. All three species showed significant antimicrobial activity.
Conclusion: The study confirms the substantial pharmacological potential of Citrus limettarisso, Citrus nobilis x Citrus deliciosa, and Citrus maxima, particularly in terms of their antioxidant and antidiabetic properties. Citrus limettarisso emerged as the most potent in most assays, underscoring its potential for therapeutic use. These findings support the use of these citrus species as natural sources of bioactive compounds for health and medical applications. It carries special importance for public health advancements.
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