@article {1170, title = {Plant-Derived Selected Bioactive Saponins and Tannins: An Overview of their Multi-Target Mechanisms and Diverse Biological Activities}, journal = {Pharmacognosy Research}, volume = {15}, year = {2023}, month = {October 2023}, pages = {623-635}, type = {Review Article}, chapter = {623}, abstract = {

An extensive variety of ailments have been treated using medicinal herbs for ages. Recent research has revealed that many of these plants possess multiple therapeutic activities, rendering them interesting candidates for the creation of novel medicines. This review examines the current state of knowledge regarding the multi targeted activities of medicinal plants, including their potential for treating multiple diseases like anti-inflammatory, anti-microbial, anti-hyperglycaemic and anti-cancer activities, their ability to modulate multiple pathways, enzymes, genes and proteins. Finally, the review highlights the potential of naturally derived substances from plant material, for the development of multitargeted drugs and suggests strategies for further research. The multi-target activities will be thoroughly explored in this review of ginsenosides, platycodon D, dioscin, soyasaponins and aescin were chosen as saponins, whereas methyl gallate, chebulinic acid, tannic acid, theaflavin and punicalagins were chosen as tannins. This overview gives a brief history of the isolated natural compounds, their structures, multi-target activity, and their suggested mechanisms of action.

}, keywords = {Bioactive compounds, Biological activities, Medicinal plants, Multi targets, saponins, Tannins}, doi = {10.5530/pres.15.4.066}, author = {Dudday Venkata Vyshnavi and Sunkara Sivananda Swaroop and Akkiraju Sudheer and Somasekhar Reddy Kanala and Ramavath Muralidhar Naik and Onamala Varalakshmi} } @article {468, title = {Bioassay-guided In vitro Study of the Antimicrobial and Cytotoxic Properties of the Leaves from Excoecaria Lucida Sw}, journal = {Pharmacognosy Research}, volume = {9}, year = {2017}, month = {November 2017}, pages = {396-400}, type = {Original Article}, chapter = {396}, abstract = {

Background: Excoecaria lucida Sw. (Euphorbiaceae) is a plant conventionally used throughout the Caribbean in the treatment of infectious diseases. Objective: To evaluate, using bioassay-guided fractionation, the in vitro cytotoxicity and antimicrobial activity of E. lucida leaves. Materials and Methods: A 95\% ethanol crude extract was dried and fractionated by solid-liquid separation in four phases (hexane, dichloromethane, ethyl acetate, and butanol). Antimicrobial activity (3 bacteria, 6 yeasts, and 2 fungi) was evaluated by the dilution method with resazurin (2048, 512, 128, 32, and 8 {\textmu}g/mL). The cytotoxicity assays were evaluated in two cell lines: MRC-5 and RAW 264.7; calculating the selectivity index. Assays were performed for the total extract, the isolated compound with the highest yield, and the ethyl acetate and butanol phases. Isolated compounds were characterized by nuclear magnetic resonance and mass spectrometry techniques. Results: Fractionation process led to the isolation of ellagic acid (784.29 mg), 3,3{\textquoteright},4{\textquoteright}-tri-O-methyl ellagic 4-O-β-D-glucopyranoside acid (6.1 mg), and corilagin (6.91 mg). The most active were ethyl acetate phase and ellagic acid with IC50 = 128 μg/mL against seven and five different species of microorganisms, respectively. The total extract (IC50 = 512 {\textmu}g/mL) and the ethyl acetate phase (IC50 = 128 {\textmu}g/mL) were cytotoxic in both cell lines, while butanol phase and ellagic acid both with IC50 \>2048 {\textmu}g/mL seemed to be safer. Conclusions: The results obtained indicate that the Excoecaria leaves can be conventionally used as antimicrobial, but it should be present that some cytotoxicity could appear. In addition, the three identified compounds were reported for the first time in the species.

}, keywords = {Corilagin, Ellagic acid, Ethnopharmacological use, Selectivity index, Tannins}, doi = {10.4103/pr.pr_124_16}, author = {Ania Ochoa-Pacheco and Julio C{\'e}sar Escalona Arranz and Munyewu Beaven and Renato Peres-Roses and Yordania Matos G{\'a}mez and Miladis I Camacho-Pozo and Gabriel Llaurad{\'o} Maury and Ma{\'\i}ra Bidart de Macedo and Paul Cos and Josean Fechine Tavares and Marcelo Sobral da Silva} } @article {827, title = {Evaluation of extracts of leaf of three Ficus deltoidea varieties for antioxidant activities and secondary metabolites}, journal = {Pharmacognosy Research}, volume = {1}, year = {2009}, month = {January 2010 }, pages = {216-223}, type = {Original Article}, chapter = {216}, abstract = {

Present study aimed to investigate alcoholic and aqueous extracts of three varieties of Ficus deltoidea for antioxidant activity using in vitro models such as free radical scavenging activity, reduction power of iron (III), superoxide anion (O2-) scavenging, xanthine oxidase (XOD), nitric oxide (NO{\textperiodcentered}) and lipid peroxidation. The total polyphenols, flavonoids and tannins were estimated using colorimetry in order to investigate their correlation with antioxidant activities. Alcoholic and aqueous extracts of different varieties of the plant exhibited different radical scavenging activities in different models (P\<0.05). Both the types of extracts displayed high antioxidant activity in DPPH and superoxide anion scavenging models, and the activity was comparable to quercetin, rutin, butylated hydroxyanisole (BHA), ascorbic acid and allopurinol. A correlation was observed between antioxidant activity and content of total polyphenols, flavonoids and tannins. The results of this study indicate that the extracts of Ficus deltoidea possess promising antioxidant activity.

}, keywords = {Antioxidant, Ficus deltoidea, Flavonoids, Polyphenols, Tannins}, doi = {Nil}, author = {Abdullah Zunoliza and Hussain Khalid and Ismail Zhari and Mat Ali Rasadah and Pisar Mazura and Jamaludin Fadzureena and Sahdan Rohana} }