@article {1389, title = {Antioxidant Capacity and Protective Effect of Aqueous and Hydroalcoholic Extracts of Senecio rhizomatus Rusby "Llancahuasi" on Erythrocytes Subjected to Oxidative Stress}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {March 2021}, pages = {516-527}, type = {Research Article}, chapter = {516}, abstract = {

Objective. To evaluate the antioxidant capacity and protective effect of aqueous and hydroalcoholic extracts of Senecio rhizomatus Rusby in rat erythrocytes subjected to oxidative stress with hydrogen peroxide (H2O2). Methodology. This study used an experimental design. The extracts were obtained through maceration with 96{\textdegree} ethanol (SeR96), 70{\textdegree} ethanol (SeR70), 50{\textdegree} ethanol (SeR50) and through infused water (SeRAc). Secondary metabolites were identified through colorimetric reactions and precipitation. In each extract, we could determine the capacity to eliminate 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), the reduction of ferric ion and the total polyphenol content. In addition, the activity on the plasma membrane redox system (PMRS) was evaluated in each extract. The protection against oxidative stress in erythrocytes was evaluated by determining the content of reduced glutathione (GSH) and malondialdehyde (MDA). Results. Alkaloids, flavonoids, phenolic compounds, sesquiterpene lactones and sugars were identified in all the extracts. The total polyphenols content showed a correlation with the reduction of ferric ion (r=0.885) and with DPPH radicals elimination (r = -0.899), where the one with the highest antioxidant capacity was SeR50. Thus, the SeR50 (all concentrations) and SeR70 (100 μg/mL concentration) significantly increased the PMRS activity compared to the control group. After inducing oxidative stress in erythrocytes, all the extracts maintained the GSH level and inhibited MDA formation significantly compared to the H2O2 group. Conclusion. The antioxidant capacity of hydroalcoholic extracts (96{\textdegree}, 70{\textdegree}, 50{\textdegree}) and aqueous infusion of Senecio rhizomatus Rusby is related to the content of polyphenols. They increase the plasma membrane redox system activity in rat erythrocytes and protect them from oxidative stress induced with H2O2, showing an increase in the concentration of reduced glutathione and a decrease in malondialdehyde.

}, keywords = {Antioxidant, Lipoperoxidation, Plasma membrane redox system, Reactive Oxygen Species, Reduced glutathione}, doi = {10.5530/pj.2021.13.65}, author = {Justil-Guerrero Hugo Jes{\'u}s and Ch{\'a}vez-Flores Juana Elvira and C{\'a}rdenas-Orihuela Robert Armando and Ramos- Jaco Antonio Guillermo and {\~N}a{\~n}ez-del-Pino Daniel and V{\'a}squez-Quispe {\'A}ngel David and Rojas-Cardenas Nathalie Felicita and Fern{\'a}ndez-Flores N{\'e}lber} } @article {1660, title = {Antioxidant Capacity of Chuquiraga Spinosa Less. "Huamanpinta" and Prevention of Carrageenan-Induced Inflammation in Mice}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {September 2021}, pages = {1287-1296}, type = {Research Article}, chapter = {1287}, abstract = {

Objective: To evaluate the antioxidant capacity of Chuquiraga spinosa extracts and prevention of carrageenan-induced inflammation in mice. Methodology: Experimental design: plant species, erythrocytes and male BALB C53 mice, were considered as biological material. Antioxidant capacity was evaluated in 50\%, 70\%, 96\% and aqueous ethanolic extracts by 2,2-Diphenyl-1-Picrylhydrazyl reduction, malondialdehyde inhibition in oxidized erythrocytes with H2O2 and correlating with polyphenol content equivalent to gallic acid/gram dry extract. Inflammation was evaluated by inoculating carrageenan 2\% in "subcutaneous air bag" of mice: 1) White, 2) carrageenan, 3) dexamethasone 2 mg/kg, 4-6) ethanolic extract 70\% doses 100, 250 and 500 mg/kg respectively; determining nitric oxide, malondialdehyde, total proteins, albumin, leukocytes in exudate and histological changes. Results: Alkaloids, flavonoids, terpenes, phenolic compounds, tannins, carbohydrates, triterpenes, steroids and sesquiterpene lactones were identified; aqueous extract presented greater reduction of 2,2-Diphenyl-1-Picrylhydrazyl (CI50 = 58.99 μg/mL), ethanolic extract 70\% presented greater inhibition of malondialdehyde in erythrocytes (CI50 = 16.44 nm/mL); It was observed that the higher the amount of polyphenols, the greater the reduction of 2,2-Diphenyl-1-Picrylhydrazyl (r=-0.909) and the greater the inhibition of malondialdehyde (r=-0.781). With 500 mg/kg of 70\% ethanolic extract there was greater anti-inflammatory effect inhibiting malondialdehyde, nitric oxide, albumin, total proteins and leukocytes in 55.55\%, 81.92\%, 41.20\%, 31.51\% and 32.45\% (p\<0.01) respectively and less infiltration of leukocytes and lymphocytes in air sac membrane. Conclusion: The extracts of aerial parts of Chuquiraga spinosa showed antioxidant capacity correlated to polyphenol content. The 70\% ethanolic extract prevented inflammation in mice in a dosedependent manner.

}, keywords = {Antioxidant, Ethanolic extract, Leukocytes, Lipoperoxidation, Nitric oxide, Oxidative stress}, doi = {10.5530/pj.2021.13.163}, author = {Hugo Jes{\'u}s Justil-Guerrero and Jorge Luis Arroyo-Acevedo and Juan Pedro Rojas-Armas and Miriam Palomino- Pacheco and Magaly Villena-Tejada and Wilmer Atilio Segura V{\'\i}lchez} } @article {1177, title = {Protection of Erythrocytes against Lipoperoxidation and Antiinflammatory Effects of Ethanolic Extract of Encelia canescens Lam Leaves in Mice}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {June 2020}, pages = {798-804}, type = {Original Article}, chapter = {798}, abstract = {

Background: Encelia canescens Lam is a plant traditionally used in Peru for medicinal purposes, and is attributed antioxidant properties, indicating that it could be used in the prevention of non-communicable diseases. Objective: This study aims to evaluate the protection of erythrocytes from lipoperoxidation and the anti-inflammatory effect of ethanolic extract of E. canescens leaves in mice. Materials and methods: Protection from lipoperoxidation was evaluated by inhibition of hemolysis and quantifying malondialdehyde (MDA) concentration against oxidative stress induced with hydrogen peroxide (H2O2) at 200, 150, 100, 50 and 25 μg/mL E. canescens concentrations. The 1\% carrageenan-induced air pouch model was used for evaluated inflammation, where albumin, total proteins, MDA, number and leukocyte differentiation were determined in the exudate, and a histopathological evaluation was performed. The concentrations evaluated were 100, 250 and 500 mg/kg of E. canescens Results: All the concentrations evaluated protected protected erythrocytes from lipoperoxidation (p\<0.05), being E.D. value 200 μg/mL. Regarding anti-inflammatory effect, the albumin, total proteins and MDA values of the treatment groups were lower than carrageenan 1\% group (p\<0.05), but, due to less leukocyte migration and presence of macrophages and the histopathological evaluation, the E.D value was 500 mg/kg. Conclusion: Ethanolic extracts of E. canescens leaves protect erythrocytes from lipoperoxidation and have dose-dependent anti-inflammatory effects maybe for presence of p-hydroxyacetophenone-derived, and these could be new safer anti-inflammatories.

}, keywords = {Antiinflammatory, Carrageenan, Encelia canescens Lam, Hemolysis, Lipoperoxidation, Malondialdehyde}, doi = {10.5530/pj.2020.12.114}, author = {Fern{\'a}ndez-Flores N and Rojas-Cardenas NF and Vásquez-Quispe AD and Chávez-Flores Juana E and Justil-Guerrero Hugo J and Parre{\~n}o-Tipian JM and Silva-Correa Carmen R and Villarreal-La Torre V{\'\i}ctor E} }