A1 Refereed original research article in a scientific journal
The in vitro anthelmintic properties of browse plant species against Haemonchus contortus is determined by the polyphenol content and composition
Authors: G. Mengistu, H. Hoste, M. Karonen, J.-P. Salminen, W.H. Hendriks, W.F. Pellikaan
Publisher: ELSEVIER SCIENCE BV
Publication year: 2017
Journal: Veterinary Parasitology
Journal name in source: VETERINARY PARASITOLOGY
Journal acronym: VET PARASITOL
Volume: 237
First page : 110
Last page: 116
Number of pages: 7
ISSN: 0304-4017
eISSN: 1873-2550
DOI: https://doi.org/10.1016/j.vetpar.2016.12.020(external)
Abstract
The aims of the present study were to (a) evaluate the anthelmintic activity of 10 East African browse plant. extracts, (b) examine their role in inhibition of Haemonchus contortus larval exsheathment, (c) establish relationship between inhibition of larval exsheathment and browse plant extract polyphenol composition. Acetone/water (70/30%) extracts of air dried leaves of Acacia etbaica, Cadaba farinosa, Capparis tomentosa, Dichrostachys cinerea, Dodonaea angustifolia, Euclea racemosa, Maerua angolensis, Maytenus senegalensis, Rhus natalensis and Senna singueana were used. The larval exsheathment inhibition assay (LEIA) was applied using H. contortus third stage larvae (L-3) and browse plant extract concentrations of 0, 150, 300, 600, 1200 mu g/ml in phosphate buffered saline (PBS). Data were analysed using the PROC MIXED procedure of SAS. Polyvinylpolypyrrolidone (PVPP) was used to evaluate whether polyphenols were involved in L-3 exsheathment inhibition. All browse plant extracts significantly (P <= 0.001) inhibited larval exsheathment in a dose dependent manner. The dose required to inhibit 50% of the larvae (EC50) was highest in C. farinosa and lowest in E. racemosa and M. senegalensis. Significant differences (P < 0.001) between the control and PVPP treated A. etbaica, C. tomentosa, M. angolensis, R. natalensis and D. cinerea indicates that larval inhibition was largely due to non-phenol compounds. For E. racemosa, M. senegalensis, D. angustifolia and S. singueana, PVPP treatment reversed inhibition activity and in these extracts, inhibition was mostly attributable to tannin and other polyphenols (kaempferol, quercetin and myricetin based glycosides). Overall, the browse plant extracts have anthelmintic property against H. contortus and larval inhibition resulting from the presence of phenolic and non-phenolic compounds. (C) 2017 Elsevier B.V. All rights reserved.
The aims of the present study were to (a) evaluate the anthelmintic activity of 10 East African browse plant. extracts, (b) examine their role in inhibition of Haemonchus contortus larval exsheathment, (c) establish relationship between inhibition of larval exsheathment and browse plant extract polyphenol composition. Acetone/water (70/30%) extracts of air dried leaves of Acacia etbaica, Cadaba farinosa, Capparis tomentosa, Dichrostachys cinerea, Dodonaea angustifolia, Euclea racemosa, Maerua angolensis, Maytenus senegalensis, Rhus natalensis and Senna singueana were used. The larval exsheathment inhibition assay (LEIA) was applied using H. contortus third stage larvae (L-3) and browse plant extract concentrations of 0, 150, 300, 600, 1200 mu g/ml in phosphate buffered saline (PBS). Data were analysed using the PROC MIXED procedure of SAS. Polyvinylpolypyrrolidone (PVPP) was used to evaluate whether polyphenols were involved in L-3 exsheathment inhibition. All browse plant extracts significantly (P <= 0.001) inhibited larval exsheathment in a dose dependent manner. The dose required to inhibit 50% of the larvae (EC50) was highest in C. farinosa and lowest in E. racemosa and M. senegalensis. Significant differences (P < 0.001) between the control and PVPP treated A. etbaica, C. tomentosa, M. angolensis, R. natalensis and D. cinerea indicates that larval inhibition was largely due to non-phenol compounds. For E. racemosa, M. senegalensis, D. angustifolia and S. singueana, PVPP treatment reversed inhibition activity and in these extracts, inhibition was mostly attributable to tannin and other polyphenols (kaempferol, quercetin and myricetin based glycosides). Overall, the browse plant extracts have anthelmintic property against H. contortus and larval inhibition resulting from the presence of phenolic and non-phenolic compounds. (C) 2017 Elsevier B.V. All rights reserved.
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