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Ethnopharmacological investigation of the diuretic and hemodynamic properties of native species of the Brazilian biodiversity.
- Source :
-
Journal of ethnopharmacology [J Ethnopharmacol] 2015 Nov 04; Vol. 174, pp. 369-78. Date of Electronic Publication: 2015 Aug 28. - Publication Year :
- 2015
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Abstract
- Ethnopharmacological Relevance: Although Echinodorus grandiflorus, Cuphea carthagenensis, and Phyllanthus tenellus infusions are used in Brazilian folk medicine due to their possible diuretic effect, none of these species was critically investigated as a diuretic drug. So, the aim of this study was to evaluate the possible acute diuretic activity of ethanol soluble fractions (ES) obtained from these species and assess the relationship between renal cortical blood flow and their antioxidant and hypotensive activity using normotensive Wistar rats.<br />Material and Methods: The preparation obtained from E. grandiflorus (ES-EG), C. carthagenensis (ES-CC), and P. tenellus (ES-PT) infusions was orally administered in a single dose to rats. Urine excretion rate, pH, density, conductivity and Na(+), K(+), Cl(-) and HCO3(-) contents were measured in the urine of saline-loaded animals. Concentration of electrolytes, total protein, urea, creatinine, and angiotensin converting enzyme (ACE) activity were evaluated in collected serum. The involvement of the renal cortical blood flow and antioxidative activity in the hypotensive and diuretic effects was also determined.<br />Results: Water and Na(+), Cl(-) and Na(+) excretion rates were significantly increased by ES-EG, while urinary bicarbonate excretion was reduced. Moreover, ES obtained from E. grandiflorus was able to significantly increase renal blood flow and reduce mean arterial pressure and oxidative stress in "in vitro" and "in vivo" models. All other parameters evaluated were not affected by any treatment.<br />Conclusion: The results presented here shown that the ES-EG obtained from E. grandiflorus leaves shown a significant diuretic and hypotensive activity and suggest that these effects could be related with an important renal and systemic vasodilator effect. In addition, it was shown for the first time that the pharmacological effects of ES obtained from P. tenellus and C. carthagenensis do not support its popular use as a diuretic agent.<br /> (Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.)
- Subjects :
- Alismataceae
Animals
Brazil ethnology
Cuphea
Diuretics isolation & purification
Hemodynamics physiology
Male
Phyllanthus
Plant Extracts isolation & purification
Plants, Medicinal
Rats
Rats, Wistar
Biodiversity
Diuretics pharmacology
Ethnopharmacology methods
Hemodynamics drug effects
Plant Components, Aerial
Plant Extracts pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1872-7573
- Volume :
- 174
- Database :
- MEDLINE
- Journal :
- Journal of ethnopharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 26319961
- Full Text :
- https://doi.org/10.1016/j.jep.2015.08.029