Background: The fruit of Ziziphus Lotus L. (ZL) is rich in bioactive components. It is known for its high content in polyphenols which gives it its immunomodulatory, antioxidant, and antimicrobial properties. Objective: The intent of the current study was to evaluate, in vivo, the effect of the aqueous extract of ZL fruit’s pulp on humoral immune response as well as its effect on neutrophils’ bactericidal activities, hemolytic and antioxidant and activities. Methods: The antioxidant activity of ZL’s aqueous extract’s was evaluated using DPPH. Hemmagglutination titer assay was used to evaluate the effect of the extract on humoral immune response. ZL extract’s hemolytic activity was assessed by enumerating hemoglobin rates. The effect of ZL extract on the bactericidal activity of Neutrophils was evaluated using MTT colorimetric assay. Results / Discussion: A significant (P<0.05) immunosuppressive effect on humoral immunity (6-fold) was observed. Significant suppression (P<0.05) of the bactericidal activity of neutrophils treated with 0.5 and 1 g/ml of the extract was observed compared to untreated neutrophils. The extract exhibited a high antioxidant activity determined by DPPH test with an IC50 value 10-fold higher (P<0.05) than the IC50 of ascorbic acid. The highest hemolytic activity was found with the lowest concentration of the extract while the higher concentrations tested seem to have an anti-hemolytic activity with a dose dependent effect. Conclusion: The aqueous extract of ZL’s fruit pulp possesses an immunosuppressive activity on both the innate and adaptive immunity responses. Our results demonstrate an anti-oxidative activity as well as an ability to decrease neutrophil bactericidal hemolytic activities as well as humoral immune responses.
Introduction: The use of plants in traditional medicine goes back to antiquity and still represents an essential part of the Moroccan health care system due to their effectiveness. Although Zea mays (ZM) silks are considered as waste products, they are consumed for their medicinal properties. They are rich in bioactive components, giving them a wide range of uses as remedies. The aim of this study was to evaluate after a phytochemical screening, the effect of ZM silk aqueous extract on humoral immune response, on Neutrophil bactericidal, antioxidants and hemolytic activities. Methods: The antioxidant activity was assessed using DPPH. Hemagglutination titer assay was used to evaluate the effect on humoral immunity. Hemolytic effect of ZM was evaluated by quantifying hemoglobin rates. The effect on Neutrophil bactericidal activity was assessed using MTT colorimetric assay. Results: The extract exhibited high quantity of saponins and flavones; a high antioxidant activity (IC50: 247,15 vs. control 0,152 mg/ml), a significant (p<0, 05) immunosuppressive effect in vivo on titer values of antibodies (80 times) as well as an antibacterial effect on Staphylococcus aureus and Salmonella enteritidis. A significant suppression of Neutrophil bactericidal activity of cells treated with 0, 5 and 1g/ml of ZM extract was observed. It also exhibited a significant dose-dependent anti-hemolytic activity with the lowest hemolytic activity was found with the lowest concentrations of the extract. Conclusion: Our results indicate that aqueous extract of ZM silk possess antioxidant, anti-hemolytic activity as well as an immunosuppressive activity by decreasing humoral immune and Neutrophil bactericidal responses.
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