@article {915, title = {Investigation of Secondary Metabolites and Cytotoxicity of Jacquemontia pentantha (Jacq.)}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {July 2019}, pages = {718-723}, type = {Original Article}, chapter = {718}, abstract = {

Introduction: The aim of this study is to isolate and identify sterols and terpenes from the chloroform/methanol extract (3:1) of aerial parts of Jacquemontia pentantha (Jacq.) and evaluation of cytotoxic activity of crude extract and phytol for the first time from this plant. Methods: Different chromatographic techniques for the aerial parts of Jacquemontia pentantha extract were used resulting in isolation of eight compounds. Their structures were elucidated by spectroscopic methods including 1HNMR, 13CNMR, EI/MS spectrometry and by comparing their data with those reported in the literature. The cytotoxicity was evaluated using MTT assay. The mode of action of the extract was predicted by using Enzyme-linked Immunosorbent Assay Kit for Tubulin beta (TUBb). Results: Eight compounds for the first time from this plant were identified as Palmitic acid (1), Phytol (major) (2), Stigmast-4-en- 3-one (3), mixture of α-amyrin (4) and β{\textendash}amyrin (5), 1,6,10,14,18,22-Tetracosahexaen-3- ol,2,6,10,15,19,23-hexamethyl (all-E) (6) and mixture of α{\textendash} amyrin acetate (7) and β-amyrin acetate (8). The extract showed potent cytotoxic activity on MCF-7 breast carcinoma cell line as well as HCT-116 colon carcinoma cell line at different concentrations (100-6.25 ug/ml) with IC50 (21.8 {\textpm} 0.9) and (40.9 {\textpm} 1.3) respectively. Phytol showed potent cytotoxic activity on MCF-7 cell line at different concentrations (100-12.5 ug/ml) with IC50 (60 {\textpm} 2.4), while it had no cytotoxic effect on HCT-116 cell line. The extract showed significant TUBb polymerization inhibition activity. Conclusion: The extract of aerial parts of Jacquemontia pentantha (Jacq.) and also phytol compound has cytotoxic activity due to the presence of phytochemicals such as sterols and terpenes.

}, keywords = {Cytotoxic activity, Enzyme-Linked Immunosorbent Assay, Jacquemontia pentantha, MTT Assay, Sterols, Terpenes}, doi = {10.5530/pj.2019.11.114}, author = {Dina M Eskander and Ezzel -Din A El-Khrisy and Mary H Grace and Marian Nabil and Mahmoud I Nassar and Marwa M Mounier} } @article {1030, title = {Two Triterpenoid Saponins with alpha-glucosidase Inhibitory Activity from Harpullia pendula Seed Extract}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {November 2019}, pages = {1386-1390}, type = {Original Article}, chapter = {1386}, abstract = {

Background: Harpullia pendula Planch (family Sapindaceae) is a small to medium rainforest tree native to Australia. Objective: This study aims to isolate triterpenoid saponins from H. pendula and test them as α-glucosidase inhibitors. Materials and Methods: The saponin compounds were obtained using variable chromatographic techniques and characterized by spectral analysis. Results: Two new triterpenoid saponins were obtained as an inseparable mixture from H. pendula methanolic seed extract. Their structures were determined as 3-O-β-D-glucopyranosyl-(1{\textrightarrow}2)-[α-L-arabinofuranosyl-(1{\textrightarrow}3)]-βD-glucuronopyranosyl22-OangeloylA1- barrigenol and 3-O-β-D-galactopyranosyl-(1{\textrightarrow}2)-[α-L-arabinofuranosyl-(1{\textrightarrow}3)]-β-Dglucuronopyranosyl 22-O-(2-methylbutyroyl)-A1 barrigenol, respectively. The triterpene part 22-O-(2-methyl butyroyl) A1-barrigenol has never been characterized before. The α- glucosidase inhibitory activity of the two saponin mixture was evaluated invitro and proved to exhibit strong activity with IC50 value equals to 13.3 {\textpm} 5.0 ppm and IC90 value equals to 21.5 {\textpm} 8.0 ppm. Conclusion: Two new saponins were characterized from their mixture and found to exhibit α-glucosidase inhibitory activity.

}, keywords = {Harpullia pendula, Sapindaceae, Triterpenoid saponins}, doi = {10.5530/pj.2019.11.214}, author = {Marian Nabil and Neveen S Ghaly and Iman AA Kassem and Mary H Grace and Farouk R Melek} }