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Phytochemical, Antidiabetic, Antioxidant, Antibacterial, Acute and Sub-Chronic Toxicity of Moroccan Arbutus unedo Leaves

  • Latifa, Doudach (Biomedical Engineering Department, National School of Arts and Crafts Rabat (ENSAM), Mohammed V University) ;
  • Hanae Naceiri, Mrabti (Laboratory of Pharmacology and Toxicology, Bio Pharmaceutical and Toxicological Analysis Research Team, Faculty of Medicine and Pharmacy, Mohammed V University) ;
  • Samiah Hamad, Al-Mijalli (Department of Biology, College of Sciences, Princess Nourah bint Abdulrahman University) ;
  • Mohamed Reda, Kachmar (Faculty of Sciences, Health and Environment Laboratory, Plant Protection Team, Moulay Ismail University) ;
  • Kaoutar, Benrahou (Laboratory of Pharmacology and Toxicology, Bio Pharmaceutical and Toxicological Analysis Research Team, Faculty of Medicine and Pharmacy, Mohammed V University) ;
  • Hamza, Assaggaf (Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Umm Al-Qura University) ;
  • Ahmed, Qasem (Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Umm Al-Qura University) ;
  • Emad Mohamed, Abdallah (Department of Science Laboratories, College of Science and Arts, Qassim University) ;
  • Bodour Saeed, Rajab (Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Umm Al-Qura University) ;
  • Khouloud, Harraqui (Biology and Health Laboratory, Faculty of Sciences, Ibn Tofail University) ;
  • Mouna, Mekkaoui (Pharmacodynamics Research Team ERP, Laboratory of Pharmacology and Toxicology, Faculty of Medicine and Pharmacy, University Mohammed V) ;
  • Abdelhakim, Bouyahya (Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, and Genomic Center of Human Pathologies, Mohammed V University) ;
  • Moulay El Abbes, Faouzi (Laboratory of Pharmacology and Toxicology, Bio Pharmaceutical and Toxicological Analysis Research Team, Faculty of Medicine and Pharmacy, Mohammed V University)
  • Received : 2022.06.05
  • Accepted : 2022.12.12
  • Published : 2023.03.31

Abstract

Objectives: Moroccan Arbutus unedo is an essential medicinal plant; however, little is known about the biological properties of its leaves mentioned in Moroccan traditional medicine. Methods: Various standard experiments were performed to evaluate the phytochemical, antidiabetic, antioxidant, antibacterial, and acute and sub-chronic toxicity characteristics of A. unedo leaves. Results: Phytochemical screening led to the identification of several phytochemical classes, including tannins, flavonoids, terpenoids, and anthraquinones, with high concentrations of polyphenols (31.83 ± 0.29 mg GAEs/g extract) and flavonoids (16.66 ± 1.47 mg REs/g extract). Further, the mineral analysis revealed high levels of calcium and potassium. A. unedo extract demonstrated significant antioxidant and anti-diabetic activities by inhibiting α-amylase (1.350 ± 0.32 g/mL) and α-glucosidase (0.099 ± 1.21 g/mL) compared to the reference drug Acarbose. Also, the methanolic extract of the plant exhibited significantly higher antibacterial activity than the aqueous extract. Precisely, three of the four examined bacterial strains exhibited substantial susceptibility to the methanolic extract . Minimum bactericidal concentration (MBC)/minimum inhibitory concentration (MIC) values indicated that A. unedo harbor abundant bactericidal compounds. For toxicological studies, mice were administered with A. unedo aqueous extract at single doses of 2,000 and 5,000 mg/kg. They did not exhibit significant abnormal behavior, toxic symptoms, or death during the 14-day acute toxicity test and the 90-day sub-chronic toxicity test periods. The general behavior, body weight, and hematological and biochemical status of the rats were assessed, revealing no toxicological symptoms or clinically significant changes in biological markers observed in the mice models, except hypoglycemia, after 90 days of daily dose administration. Conclusion: The study highlighted several biological advantages of A. unedo leaves without toxic effects in short-term application. Our findings suggest that conducting more comprehensive and extensive in vivo investigations is of utmost importance to identify molecules that can be formulated into pharmaceuticals in the future.

Keywords

Acknowledgement

Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2023R158) Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.

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