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. 2020 Sep:177:112423.
doi: 10.1016/j.phytochem.2020.112423. Epub 2020 Jul 18.

Investigation of Dalea parryi (Fabaceae) metabolites for anthelmintic activity against the human pathogenic hookworm Ancylostoma ceylanicum

Gil Belofsky  1 , Lindsay Engels  2 , Victoria McPherson  2 , Katherine Nash  3 , Kiah Sullivan  2 , Brendon Torrey  2 , Cassandra Ripley  2 , Angel Coria  2 , Teresa Bicchieri  2 , Blaise Dondji  4
Affiliations

Investigation of Dalea parryi (Fabaceae) metabolites for anthelmintic activity against the human pathogenic hookworm Ancylostoma ceylanicum

Gil Belofsky et al. Phytochemistry. 2020 Sep.

Abstract

The US Southwest plant Dalea parryi (Fabaceae) was investigated as part of an ongoing study of the potential of plant compounds for anthelmintic activity to the human pathogenic hookworm Ancylostoma ceylanicum. This has resulted in the isolation of three previously undescribed isoflavonoid metabolites, denoted parryans A-C, a chalcone, six pterocarpans, and three known compounds from the roots of D. parryi. Parryans A and B express a rarely-seen O-prenyl substituent. Structures of the previously undescribed compounds were established using 1D and 2D NMR spectroscopy and mass spectrometry. The relative and absolute configurations of the undescribed stereoisomers were assigned using chemical shift and coupling constant data and comparisons of specific rotations to published data. The most active of the isolated compounds only expressed a 17% reduction in survival of A. ceylanicum adult hookworm in an ex vivo assay at 50 μg/mL after 5 days exposure. Toxicity, ranging from 47 to 93% reduction in survival of mammalian splenocytes was expressed by four of the compounds.

Keywords: Ancylostoma ceylanicum; Anthelmintic activity; Chalcone; Dalea parryi; Fabaceae; Isoflavone; Pterocarpan; Toxicity.

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Conflict of interest statement

Declaration of competing interest

No potential conflict of interest was reported by the authors.

Declaration of interests

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Fig. 1.
Fig. 1.
Structures of compounds 1-13 isolated from Dalea parryi.
See this image and copyright information in PMC

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