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Wednesday, 1 July 2015

1823 - Bahia Independence Day: the end of Portuguese rule in Brazil, with the final defeat of the Portuguese crown loyalists in the province of Bahia.

Journal of Ethnopharmacology

Research Paper
Hancornia speciosa Gomes (Apocynaceae) as a potential anti-diabetic drug

doi:10.1016/j.jep.2014.11.050
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Abstract
Ethnopharmacological relevance
Materials and Methods
Results
Conclusions

Graphical abstract
Full-size image (22 K)
Keywords
  • Hancornia speciosa;
  • Diabetes;
  • α-glucosidase;
  • Glucose uptake;
  • Anti-hyperglycemic
Corresponding author. Tel.: +55 31 3409 2726; fax: +55 31 3409 2695.
Volume 161, 23 February 2015, Pages 30–35

The leaves of Hancornia speciosa Gomes are traditionally used to treat diabetes in Brazil. The aim of the study is to evaluate the potential anti-diabetic effect of Hancornia speciosa extract and derived fractions.

The ethanolic extract from Hancornia speciosa leaves and chromatographic fractions thereof were evaluated on α-glucosidase assay, on hyperglycemic effect and glucose uptake. The chemical composition of the extract and its most active fraction was investigated by ESI–LC–MS.

The ethanolic extract and derived fractions inhibited α-glucosidase in vitro. However, only the crude extract and the dichloromethane fraction inhibited the hyperglycemic effect induced by starch or glucose. Both the extract and dichloromethane fraction were also able to increase glucose uptake in adipocytes. Bornesitol, quinic acid, and chorogenic acid were identified in the extract, along with flavonoid glycosides, whereas the dichloromethane fraction is majorly composed by esters of lupeol and/or α/β-amirin.

Hancornia speciosa has a potential anti-diabetic effect through a mechanism dependent on inhibition of α-glucosidase and increase on glucose uptake. These results give support to the use on traditional medicine of this medicinal plant.