@article {157, title = {Kaempferol {\textendash} A Dietary Flavonoid Isolated from Blepharis integrifolia}, journal = {Pharmacognosy Research}, volume = {12}, year = {2020}, month = {August 2020}, pages = {250-259}, type = {Original Article}, chapter = {250}, abstract = {

Background: Blepharis integrifolia is in the preparation of traditional formulation for the treatment of various diseases, including digestive disorders such as flatulence and dysentery. Although a very few studies have assessed the pharmacological properties, nothing is known about the phytochemicals present and the effect of extracts on its pharmacological activities. Objectives: Therefore, the objectives of the present study were to assess the role of methanol extract of B. integrifolia (MBI) for its anti-inflammatory, antioxidant, and antibacterial activities. Materials and Methods: The phytochemicals present in the extract were evaluated using high-resolution liquid chromatography and mass spectrometry (HR-LCMS). The extract and the isolated compound were subjected to antioxidant, antibacterial, and anti-inflammatory studies. Results: MBI exhibited an effective antibacterial, antioxidant, and anti-inflammatory activities at a more significant level than the standards. HR-LCMS analysis of MBI revealed the presence of kaempferol, rutin, and several phytochemicals. The activity-guided repeated fractionation of the methanol extract by silica gel column chromatography yielded a compound that exhibited strong antioxidant activity. Based on various physicochemical and spectroscopic analyses (ultraviolet, infrared, proton nuclear magnetic resonance [NMR], carbon-13 NMR, and MS), the bioactive compound isolated was elucidated as 3,5,7-trihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one (kaempferol). Furthermore, the molecular docking studies for kaempferol revealed that it binds β-lactamase at MEG binding site and was found to interact with binding site residues PHE91, TRP94, ASN109, MET148, GLU147, ASN36, and ILE201. Conclusion: The results from the present study suggest that the potent antioxidant, antibacterial, and anti-inflammatory activities observed are a result of the presence of these bioactive compounds within the extract. In addition, these results also demonstrate the antioxidant potency of kaempferol which could be the basis for its alleged health-promoting potential.

}, keywords = {Anti-inflammatory, Flavonoid, Free radicals, Kaempferol, Methanol extract}, doi = {10.4103/pr.pr_114_19}, author = {KM Anil Kumar and Ramith Ramu and S Chandan and Shivaraju Harikaranahalli Puttaiah} } @article {407, title = {Development of Validated High-performance Thin-layer Chromatography Method for Simultaneous Determination of Quercetin and Kaempferol in Thespesia populnea}, journal = {Pharmacognosy Research}, volume = {9}, year = {2017}, month = {July 2017}, pages = {277-281}, type = {Original Article}, chapter = {277}, abstract = {

Introduction: Thespesia populnea L. (Family: Malvaceae) is a well-known medicinal plant distributed in tropical regions of the world and cultivated in South Gujarat and indicated to be useful in cutaneous affections, psoriasis, ringworm, and eczema. Bark and fruits are indicated in the diseases of skin, urethritis, and gonorrhea. The juice of fruits is employed in treating certain hepatic diseases. The plant is reported to contain flavonoids, quercetin, kaempferol, gossypetin, Kaempferol-3-monoglucoside, β-sitosterol, kaempferol-7-glucoside, and gossypol. T. populnea is a common component of many herbal and Ayurvedic formulation such as Kamilari and Liv-52. Objective: The present study aimed at developing validated and reliable high-performance thin layer chromatography (HPTLC) method for the analysis of quercetin and kaempferol simultaneously in T. populnea. Method: The method employed thin-layer chromatography aluminum sheets precoated with silica gel as the stationary phase and toluene: ethyl acetate: formic acid (6:4:0.3 v/v/v) as the mobile phase, which gave compact bands of quercetin and kaempferol. Result: Linear regression data for the calibration curves of standard quercetin and kaempferol showed a good linear relationship over a concentration range of 100{\textendash}600 ng/spot and 500{\textendash}3000 ng/spot with respect to the area and correlation coefficient (R2) was 0.9955 and 0.9967. The method was evaluated regarding accuracy, precision, selectivity, and robustness. Limits of detection and quantitation were recorded as 32.06 and 85.33 ng/spot and 74.055 and 243.72 ng/spot for quercetin and kaempferol, respectively. Conclusion: We concluded that this method employing HPTLC in the quantitative determination of quercetin and kaempferol is efficient, simple, accurate, and validated.

}, keywords = {High-performance thin-layer chromatography, Kaempferol, Quercetin, Thespesia populnea}, doi = {10.4103/0974-8490.210326}, author = {Hiteksha Panchal and Aeshna Amin and Mamta Shah} }