1 research outputs found
Qualitative and Quantitative Analysis of Ethanolic Extract and Phenolic Fraction of Jatropha aethiopica (Euphorbiaceae) Leaves and Their Hypoglycemic Potential
Although Jatropha aethiopica, popularly
known in Cuba as āmata diabetesā, is used in salads
and as a dietary supplement, its chemical composition and antidiabetic
properties yet remains unclear. In this work, we evaluate the qualitative
and quantitative composition of ethanolic extract (EE) and phenolic
fraction (PF) of Jatropha aethiopica leaves and their hypoglycemic and hypolipidemic activity. Chemical
fractionation of the ethanolic extract yielded nine compounds, which
included protocatechuic acid (<b>1</b>), chlorogenic acid (<b>2</b>), caffeic acid (<b>3</b>), quercetin 3-<i>O</i>-Ī±-l-rhamnopyranosyl-(1 ā 2)-[Ī±-l-rhamnopyranolsyl-(1 ā 6)]-Ī²-d-galactopyranoside
(<b>4</b>), a new kaempferol 3-<i>O</i>-Ī±-l-rhamnopyranosyl-(1 ā 4)-[Ī±-l-rhamnopyranolsyl-(1
ā 6)]-Ī²-d-galactopyranoside (<b>5</b>),
kaempferol 3-<i>O</i>-Ī±-l-rhamnopyranosyl-(1
ā 2)-[Ī±-l-rhamnopyranolsyl-(1 ā 6)]-Ī²-d-glucopyranoside (<b>6</b>), rutin (<b>7</b>),
kaempferol 3-<i>O</i>-Ī±-l-rhamnopyranosyl-(1
ā 6)-Ī²-d-glucopyranoside (<b>8</b>), and
quercetin (<b>9</b>). The compounds (<b>1</b>, <b>4ā7</b>) were quantified by high-performance liquid chromatography photodiode
array detection (HPLC-PDA) in both the ethanolic extract (62.65 Ā±
0.15 mg/g) and phenolic fraction (61.72 Ā± 0.23 mg/g). The results
obtained show that both ethanolic extract and phenolic fraction contributed
toward the improvement of glucose tolerance, which in turn led to
a decline in the glucose levels. Remarkably, the ethanolic extract
presented a relatively higher promising effect compared to metformin