@article {1123, title = {Role of Polyphenols and Flavonoids as Anti-Cancer Drug Candidates: A Review}, journal = {Pharmacognosy Research}, volume = {15}, year = {2023}, month = {February 2023}, pages = {206-216}, type = {Review Article}, chapter = {206}, abstract = {

Natural drug-based chemotherapeutic have advanced at an unprecedented rate over the past decade. Owing to protective roles in vegetation, and exceptional antioxidant qualities, polyphenols and flavonoids have demonstrated promising clinical implications in malignancies amongst other plant metabolites. It is widely debated how dietary flavonoids and polyphenols can prevent cancer. Flavonoids are believed to execute a significant role in cancer prevention and treatment, as corroborated from experimental studies, epidemiological research, and human clinical trials. Carcinogen deactivation, antimutagenic, cell cycle arrest, apoptosis and differentiation, suppression of vasculature, oxidative stress, and reversion of multidrug resistance are among the many mechanisms of action that have been discovered. The present review outlines the classification of various polyphenols and flavonoids and their potential as anticancer therapeutic agents.

}, keywords = {Cancer, Flavonoids, Polyphenols, Reactive oxygen species., Secondary metabolites}, doi = {10.5530/pres.15.2.022}, author = {Medha Mohan Hegde and K Lakshman} } @article {279, title = {Phytochemical Screening, Total Phenolic Content, Antioxidant, and Cytotoxic Activity of Five Peruvian Plants on Human Tumor Cell Lines}, journal = {Pharmacognosy Research}, volume = {10}, year = {2018}, month = {April 2018}, pages = {161-165}, type = {Original Article}, chapter = {161}, abstract = {

Background: Cancer is considered a serious public health problem in the world; searching alternative treatments of medicinal plants constitute a promissory field to find new anticancer drugs. Objective: The aim of this study is to evaluate the phytochemical screening, total phenolic content (TPC), antioxidant, and cytotoxic activity of ethanol extracts of Waltheria ovata (WO), Piper aduncum (PA), Myrciaria dubia (MD), Physalis peruviana (PP), and Geranium dielsianum (GD) on human tumor cell lines. Materials and Methods: Phytochemical screening was assessed using chemical reactives. TPC was developed using Folin Ciocalteu reactive, and the antioxidant activity was determined against 2,2-diphenyl-1-picrylhydrazyl (DPPH), and 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals by spectrophotometry. The cytotoxic activity was determined on human tumor cell lines followed as: MCF-7, H-460, HT-29, M-14, K-562, and DU-145. Results: Phytochemical study confirmed flavonoids and phenolic compounds in all extracts. TPC was found to be the highest in WO extract (1250 mg of gallic acid equivalent/g of dried extract) rather than other extracts. The highest antioxidant activity was stablished in WO extract for DPPH and ABTS radical scavenging tests (inhibitory concentration [IC50] = 0.89 {\textpm} 0.01 μg/mL, IC50 = 4.20 {\textpm} 1.50 μg/mL). Ethanolic extracts (μg/mL) showed low cytotoxicity on human tumor cell lines (CI50 \>20 μg/mL) for PA, PP, GD, MD. Meanwhile, WO presented cytotoxicity on H460, MCF-7, and K562 tumor cell lines. Conclusion: In our findings, WO and MD extracts revealed a high antioxidant and TPC. WO exhibited better cytotoxic effect compared with 5-FU. Hence, these medicinal plants could be effective to prevent cancer disease and oxidative stress.

}, keywords = {Antioxidant activity, Cancer, cytotoxicity, Oxidative stress, Phytochemical}, doi = {10.4103/pr.pr_109_17}, author = {Oscar Herrera-Calderon and Corina Alvarado-Puray and Jorge Luis Arroyo-Acevedo and Juan Pedro Rojas-Armas and Victor Chumpitaz-Cerrate and Ren{\'a}n Ha{\~n}ari-Quispe and Rita Valenzuela-Herrera} }