Bioguided Isolation of Alkaloids and Pharmacological Effects of the Total Alkaloid Fraction from Aspidosperma pyrifolium Mart. (Apocynaceae)

Aspidosperma pyrifolium is used in traditional medicine to treat inflammatory disorders. The aim of the study was to perform phytochemical characterization and evaluate the anti-inflammatory, anti-nociceptive and acute toxicity effects of the total alkaloid fraction (TAF-Ap) from stem barks. Two mon...

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Bibliographic Details
Published in:Plants (Basel) 2021-11, Vol.10 (11), p.2526
Main Authors: Lins, Francisca Sabrina Vieira, da Silva, Vanessa Farias, Tavares, Josean Fechine, dos Santos, Vanda Lúcia, da Silva Alves, Harley
Format: Article
Language:English
Subjects:
Acetic acid
Acute toxicity
Alkaloids
Analgesics
Animals
anti-inflammatory
Anti-inflammatory agents
anti-nociceptive
Aspidosperma pyrifolium
Carrageenan
Drug dosages
Edema
High performance liquid chromatography
Inflammation
Inflammatory diseases
Lethal dose
Liquid chromatography
Mass spectrometry
Mass spectroscopy
NMR
Nuclear magnetic resonance
Pain perception
pereiro-preto
Peritonitis
Pharmacology
plumeran alkaloids
Toxicity
Two dimensional analysis
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Summary:Aspidosperma pyrifolium is used in traditional medicine to treat inflammatory disorders. The aim of the study was to perform phytochemical characterization and evaluate the anti-inflammatory, anti-nociceptive and acute toxicity effects of the total alkaloid fraction (TAF-Ap) from stem barks. Two monoterpenic indole alkaloids were isolated by high performance liquid chromatography coupled with mass spectrometry (HPLC-MS) and the structural elucidation was performed using 1D and 2D NMR analysis. As for toxicity, no animals died at 50 mg kg−1 and this concentration presented mild sedation and forced breathing within the first 24 h. The lethal dose capable of killing 50% of the animals (LD50) was estimated to be 160 mg kg−1. In the pharmacological tests, the models used were 1% carrageenan-induced paw edema and peritonitis, 1% formalin-induced nociception and 1% acetic acid-induced abdominal writhing in Swiss mice. The study made it possible to isolate 15-methoxyaspidospermine and 15-methoxypyrifolidine, corroborating the results of pharmacological assays, which showed anti-inflammatory and analgesic potential, especially at 30 mg kg−1 (p < 0.001). Thus, the species was shown to be a promising source of active substances, with special attention paid to its toxicological potential.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10112526