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Anti-inflammatory and antioxidant properties of leaf extracts of eleven South African medicinal plants used traditionally to treat inflammation.
J Ethnopharmacol. 2019 Apr 24; 234:27-35.JE

Abstract

ETHNOPHARMACOLOGICAL RELEVANCE

Inflammation is a complex mechanism employed by the body to promote healing and restoration to normal function in the event of injury. Eleven plant species were selected in this study based on their use in traditional medicine against inflammation in South Africa.

METHODS

Hexane, acetone, ethanol, methanol and water extracts of the powdered plants were prepared and a total of fifty-five extracts were tested for their anti-inflammatory and antioxidant activities. The anti-inflammatory activity of extracts was evaluated via the 15-lipoxygenase (15-LOX) inhibitory and the nitric oxide (NO) inhibition assays using lipopolysaccharide (LPS)-activated RAW 264.7 murine macrophages. Total flavonoid and total phenolic contents were determined. The antioxidant activity of the extracts was performed using radical scavenging DPPH (2, 2-diphenyl-1-picrylhydrazyl) and electron reducing ABTS (2, 2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) assays.

RESULTS

The hexane extract of Typha capensis (TC) had good lipoxygenase inhibitory activity with IC50 of 4.65 µg/mL, significantly (p < 0.05) higher than that of the positive control quercetin (IC50 = 24.60). The same extract also had good nitric oxide inhibitory activity with 86% NO inhibition and cell viability of 97% at 50 µg/mL. The TC acetone extract had the best antioxidant activity with IC50 of 7.11 and 1.91 µg/mL respectively in the DPPH and ABTS assays. Following fractionation of the TC plant material, the ethyl acetate fraction had interesting antioxidant activity and the methanol/water (35%) and hexane fractions had good 15-LOX inhibitory activity. The antioxidant and anti-inflammatory activities therefore resided in both polar and more non-polar fractions.

CONCLUSION

The acetone extract of Typha capensis and its fractions had good anti-inflammatory and antioxidant activities, supporting the medicinal use of this species against inflammation. Other species including Ficus elastica, Carpobrotus edulis, Cotyledon orbiculata and Senna italica also had good activity worthy of further investigation.

Authors+Show Affiliations

Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa.Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa.Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa.Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa. Electronic address: lyndy.mcgaw@up.ac.za.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

30572091

Citation

Ondua, Moise, et al. "Anti-inflammatory and Antioxidant Properties of Leaf Extracts of Eleven South African Medicinal Plants Used Traditionally to Treat Inflammation." Journal of Ethnopharmacology, vol. 234, 2019, pp. 27-35.
Ondua M, Njoya EM, Abdalla MA, et al. Anti-inflammatory and antioxidant properties of leaf extracts of eleven South African medicinal plants used traditionally to treat inflammation. J Ethnopharmacol. 2019;234:27-35.
Ondua, M., Njoya, E. M., Abdalla, M. A., & McGaw, L. J. (2019). Anti-inflammatory and antioxidant properties of leaf extracts of eleven South African medicinal plants used traditionally to treat inflammation. Journal of Ethnopharmacology, 234, 27-35. https://doi.org/10.1016/j.jep.2018.12.030
Ondua M, et al. Anti-inflammatory and Antioxidant Properties of Leaf Extracts of Eleven South African Medicinal Plants Used Traditionally to Treat Inflammation. J Ethnopharmacol. 2019 Apr 24;234:27-35. PubMed PMID: 30572091.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anti-inflammatory and antioxidant properties of leaf extracts of eleven South African medicinal plants used traditionally to treat inflammation. AU - Ondua,Moise, AU - Njoya,Emmanuel Mfotie, AU - Abdalla,Muna Ali, AU - McGaw,Lyndy J, Y1 - 2018/12/18/ PY - 2018/09/13/received PY - 2018/12/13/revised PY - 2018/12/16/accepted PY - 2018/12/21/pubmed PY - 2019/3/20/medline PY - 2018/12/21/entrez KW - 15-Lipoxygenase KW - Anti-inflammatory KW - Antioxidant KW - Nitric oxide KW - South Africa KW - Total flavonoid content KW - Total phenolic content KW - Typha capensis SP - 27 EP - 35 JF - Journal of ethnopharmacology JO - J Ethnopharmacol VL - 234 N2 - ETHNOPHARMACOLOGICAL RELEVANCE: Inflammation is a complex mechanism employed by the body to promote healing and restoration to normal function in the event of injury. Eleven plant species were selected in this study based on their use in traditional medicine against inflammation in South Africa. METHODS: Hexane, acetone, ethanol, methanol and water extracts of the powdered plants were prepared and a total of fifty-five extracts were tested for their anti-inflammatory and antioxidant activities. The anti-inflammatory activity of extracts was evaluated via the 15-lipoxygenase (15-LOX) inhibitory and the nitric oxide (NO) inhibition assays using lipopolysaccharide (LPS)-activated RAW 264.7 murine macrophages. Total flavonoid and total phenolic contents were determined. The antioxidant activity of the extracts was performed using radical scavenging DPPH (2, 2-diphenyl-1-picrylhydrazyl) and electron reducing ABTS (2, 2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) assays. RESULTS: The hexane extract of Typha capensis (TC) had good lipoxygenase inhibitory activity with IC50 of 4.65 µg/mL, significantly (p < 0.05) higher than that of the positive control quercetin (IC50 = 24.60). The same extract also had good nitric oxide inhibitory activity with 86% NO inhibition and cell viability of 97% at 50 µg/mL. The TC acetone extract had the best antioxidant activity with IC50 of 7.11 and 1.91 µg/mL respectively in the DPPH and ABTS assays. Following fractionation of the TC plant material, the ethyl acetate fraction had interesting antioxidant activity and the methanol/water (35%) and hexane fractions had good 15-LOX inhibitory activity. The antioxidant and anti-inflammatory activities therefore resided in both polar and more non-polar fractions. CONCLUSION: The acetone extract of Typha capensis and its fractions had good anti-inflammatory and antioxidant activities, supporting the medicinal use of this species against inflammation. Other species including Ficus elastica, Carpobrotus edulis, Cotyledon orbiculata and Senna italica also had good activity worthy of further investigation. SN - 1872-7573 UR - https://www.unboundmedicine.com/medline/citation/30572091/Anti_inflammatory_and_antioxidant_properties_of_leaf_extracts_of_eleven_South_African_medicinal_plants_used_traditionally_to_treat_inflammation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0378-8741(18)33113-1 DB - PRIME DP - Unbound Medicine ER -