Online - 2455-3891 Vol 12, Issue 10, 2019 Print - 0974-2441 Research Article POTENTIAL USES OF THE PEEL AND SEED OF Passiflora edulis f. edulis Sims (GULUPA) FROM ITS CHEMICAL CHARACTERIZATION, ANTIOXIDANT AND ANTIHYPERTENSIVE FUNCTIONALITIES LAURA GONZÁLEZ*, ANDREE ÁLVAREZ, ELIZABETH MURILLO, CARLOS GUERRA, JONH MÉNDEZ Department Chemistry, Natural Products Research Group (GIPRONUT), Science School, University of Tolima, Ibagué, Colombia. Email:
[email protected] Received: 29 April 2019, Revised and Accepted: 02 August 2019 ABSTRACT Objective: Assess the performance of a crude ethanolic extract, a dichloromethane fraction and a hydroalcoholic residue, which are the basis for chemically and biologically characterizing the husk and seed of Passiflora edulis f. edulis, collected in the region and Colombia with a view to determining potential uses. Methods: Agroindustrial residues of gulupa (peel and seed) were analyzed through a bromatological study; subsequently, they were macerated with ethanol (96%). The crude ethanolic extract was partitioned with dichloromethane, leaving a hydroalcoholic residue. The content of total phenols, the composition of phytophenols (high-performance liquid chromatography-mass spectrometry), the total antioxidant capacity using 3-ethyl benzothiazoline-6-sulfonic acid (ABTS●+) and 2,2-diphenyl-1-pyridyl hydrazyl (DPPH●), the oxygen radical absorbance capacity (ORAC), and the ferric reduction power (FRAP) were determined to the extract, the fraction, and the residue. The evaluation of the inhibitory activity of the angiotensin-converting enzyme inhibitor (ACEI) and the cell viability assay with diphenyl bromide 3- (4,5-dimethylthiazole-2-) il) -2,5-tetrazolium on human leukocytes complemented the characterization. Results: Agroindustrial waste of P. edulis f. edulis, peel and seed, contains as main constituents: Protein (8.49 and 7.29%), fiber (34.2 and 55.7%), phosphorus (1.67 and 3.09), and boron (53.3 and 58.4 mg/kg), respectively.