3 research outputs found
Sterculia setigera hydroethanolic extract protects brain tissues ex vivo against lipid peroxidation and possesses in vitro antioxidant and anti-inflammatory properties
No full textMedicinal plants remain good sources of remedies both in traditional and modern medicine. The present study aimed to evaluate ex vivo and in vitro neuroprotective effects of Sterculia setigera, a medicinal plant of Togolese flora. Inhibition of lipid peroxidation in rat brain homogenate was assayed ex vivo using the combination of ascorbic acid and FeCl2 as prooxidants. In vitro anti-inflammatory tests consisted in the evaluation of inhibition of albumin denaturation and red blood cells hemolysis. DPPH tests, FRAP test and Total antioxidant capacity (TAC) of the hydroethanolic extract of S. setigera were realized. Quantitative determination of total phenols, flavonoids and tannins was also performed. S. setigera hydroethanolic extract protected significantly brain homogenates against lipid peroxidation (-78.28 % of MDA reduction at 200 µg/mL, P<0.001). DDPH radical was scavenged by extract with IC50 of 21.25 ± 0.41 µg/mL, close to that of the standard ascorbic acid (20.60 ± 0.26 µg/mL). The TAC of S. setigera hydroethanolic extract expressed as equivalent of standard ascorbic acid was 102.44 ± 19.48 µg AAE/mg. The IC50 found for S. setigera (139.68 ± 0.36 µg/mL) when inhibiting RBCs hemolysis is very close to that of Diclofenac (128.41 ± 0.21 µg/mL). Among polyphenolic compounds quantified, flavonoids were well represented with concentration of 172.38 ± 8.36 µgRE/mg. The presence of these polyphenolics may explain good antioxidant and anti-inflammatory activities recorded, confirming its suitable usage in the local pharmacopoeia and making S. setigera a good candidate for neuroprotective drugs discovery.
Keywords: Sterculia setigera, neuroprotection, lipid peroxidation, antioxidant, anti-inflammatory
Antioxidant, Anti-Inflammatory and Wound Healing Activities of Cochlospermum planchonii Hook. F.
No full textObjective: The medicinal plant Cochlospermum planchonii Hook.f. is used in the management of various ailments in Togolese pharmacopoeia. In this study, we aimed to evaluate the antioxidant and anti-inflammatory activities of roots and leaves of C. planchonii, and burn wound healing activity of its leaf hydroethanolic extracts in rodents.
Materials and Methods: Antioxidant activities were assessed using Phosphomolybdenum assay, 2,2-diphenyl-1-picrylhydrazyl (DPPH) test and the reducing power assay. Visceral pain model, formaldehyde-induced paw edema and vascular permeability test were performed to evaluate anti-inflammatory activities in vivo. Burns were induced in rats by applying on the skin of the dorsal region an aluminum plaque preheated to 100°C for 10 seconds. Animals were treated topically with empty Carbopol gel, C. planchonii leaves extract 2.5 and 5 % in Carbopol gel, and Brulex® (Zinc oxide 15 % cream).
Results: C. planchonii extracts exhibited good antioxidant capacities close to standard compound, ascorbic acid. Leaves and root hydroethanolic extracts (1000 mg/kg), compared to control animals, significantly reduced the number of writhings (P<0.001) and the volume of paw edema (P<0.001). Similarly, both roots and leaf extracts at 1000 mg/kg have significantly inhibited vascular permeability by approximately 50% compared to the control group. C. planchonii leaves hydroethanolic extract 2.5 and 5 % in Carbopol enhanced wound healing via significantly increased contraction rates (78.63 ± 1.57 and 79.68 ± 1.48 respectively on day 12, P<0.001), confirmed by histological observations.
Conclusion: C. planchonii can promote burn healing due to anti-inflammatory, antioxidant and antimicrobial properties of the plant.
Keywords: Cochlospermum planchonii, inflammatory, antioxidant, edema, burn woun
Phytochemical Screening, Antimicrobial and Antioxidant Activities of Aloe buettneri, Mitracarpus scaber and Hannoa undulata used in Togolese Cosmetopoeia
No full textBackground: Aloe buettneri, Mitracarpus scaber and Hannoa undulata are three plants species used in the Togolese traditional medicine to cure dermatosis. This study aims at assessing their anti-oxidant and anti-microbial activities on acne-developing micro-organisms.
Methods: Six micro-organisms including Cutibacterium acnes ATCC 6919, Pseudomonas aeruginosa ATCC 27853; Escherichia coli ATCC 25922; Klebsiella pneumoniae ATCC 700603; Staphylococcus aureus ATCC 29213; and Candida albicans ATCC 35659 were used. Inhibition diameter was assessed using the agar well diffusion method. Minimum inhibitory and minimum microbicidal concentrations have been achieved through the liquid dilution method. Anti-oxidant activities were evaluated by DPPH antiradical scaving and FRAP methods. Phytochemical screening was also realized.
Results: All the microorganism’s strains tested, excepted Candida albicans and Escherichia coli, were susceptible to plants extracts at 250 mg/mL in the agar well diffusion assay with inhibition diameters ranging from 12.10 ± 0.07 to 18.20 ± 0.10 mm. The MICs values were comprised between 15.625 mg/mL and 62.5 mg/mL, when MMCs ranged from 31.25 to 125 mg/mL. At the concentration of 500 µg/mL, the scavenging properties on DPPH radicals were 49.20 ± 0.15% for H. undulata, 41.29 ± 0.51% for A. buettneri, 59.57 ± 0.41% for M. scaber and 87.22 ± 0.03% for Quercetin. For FRAP assay, the effective concentration (EC50) of A. buettneri, M. scaber and H. undulata extracts were 977.44 ± 1.13 µg/mL; 267.74 ± 10.13 µg/mL and, 272.54 ± 12.87 µg/mL respectively while quercetin presented the EC50 of 48.63 ± 2.00 µg/mL. The antimicrobial and antioxidant activities of these species might be required to the presence of polyphenols, tannins, flavonoids, triterpenes, saponoside and alkaloids identified by phytochemical screening.
Conclusion: The three plants extracts are all potential natural antimicrobial and antioxidant candidates for treating acne vulgaris.
Keywords: Aloe buettneri, Mitracarpus scaber, Hannoa undulata, antimicrobial activity, antioxidant activity, phytochemical screening, Acne vulgari
