@article {2225, title = {Bioguided Assay of Polyphenols Isolated from Medicinal Mayan Species and its Activity Against Leishmania mexicana.}, journal = {Pharmacognosy Journal}, volume = {16}, year = {2024}, month = {February 2024}, pages = {174-180}, type = {Research Article}, chapter = {174}, abstract = {

Objective: This study underlines the in vitro leishmanicidal activity of the methanol extracts (MeOH), fractions of n-hexane (n-Hex), chloroform (TCM) and ethyl acetate (EtOAc), and compounds isolated from plant species used in the Mayan traditional medicine. Materials and Methods: Extracts of medicinal species collected in the Mayan Peninsula such as Hylocerus undatus, Bauhinia divaricate, Euphorbia hirta, Ruellia nudiflora and Cedrela odorata, were tasted in a bio guided assays against amastigotes of Leishmania mexicana. Different chromatographic techniques were applied in order to isolated the most active compounds. Additionally, spectroscopic experiments 1H-NMR, 13C-NMR, LC-MS and FT-IR were stablished to determine the chemical structure of the chemical compounds. Results: Euphorbia hirta and Cedrella odorata, showed good bioactivity with 14.81 {\textpm} 2.63 g/mL and IC50 = 18.39 {\textpm} 0.88 μg/mL respectively, meanwhile Bauhinia divaricata not show activity and Ruellia nudiflora showed poor activity with IC50 = 92.18 {\textpm} 3.64 μg/mL, followed by Hylocerus undatus with IC50 = 122.5 {\textpm} 20.99 μg/mL, when tasted against amastigotes of Leishmania mexicana. Spectroscopic data confirmed the presence of quercetin, myricetin, kempherol and scopoletin, with IC50 = 2.92 {\textpm} 0.42 μM, 12.30 {\textpm} 0.57 μM, 20.22 {\textpm} 4.66 μM and 4.05 {\textpm} 0.68 μM respectively. Conclusion: The bioguided assays guided us, to the purification and isolation of four different metabolites, mainly flavonoids and structurally related compounds, some of them show good activity, however, their low bioavailability indicates the need for detailed structural relation activity studies, together with the development of formulations and delivery systems.

}, keywords = {Coumarins, Flavonoids, Leishmania mexicana, NMR structural determination, Polyphenols}, doi = {10.5530/pj.2024.16.24}, author = {Horacio Larqu{\'e} and Abelardo Ch{\'a}vez Montes and Jaime Zamora-Chimal and Moises Looh-Hern{\'a}ndez and Joel H. Elizondo Luevano and Esther del Olmo} } @article {879, title = {Secondary Metabolites from Pterocaulon alopecuroides and their Antiproliferative Activities}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {493-495}, type = {Original Article}, chapter = {493}, abstract = {

Objective: To isolate secondary metabolites from the aerial parts of Pterocaulon alopecuroides, elucidate their structures and evaluate their antiproliferative activities on selected human cancer cell lines. Materials and Methods: The ethanolic extract of P. alopecuroides afforded five compounds, which were characterized using spectroscopic techniques and by comparison with data from the literature. Antiproliferative activities of all isolates were evaluated. Results: The compounds 7-(2,3-dihydroxy-3-methylbutoxy)-6-methoxycoumarin (1), 5,6-methylenedioxy- 7-(2,3-dihydroxy-3-methylbutoxy) coumarin (2), Dihydrokaempferol (3), 5,7,4{\textasciiacute}-trihydroxy- 6-(α,α-dimethylallyl)dihydroflavonol (4) and 5,4{\textasciiacute}-dihydroxy-7-(γ,γ-dimethylallyloxy)dihydroflavonol (5) were isolated. The antiproliferative activity of all compounds was evaluated in a panel of six human solid tumor cell lines showing GI50 values for the most active compounds in the low micromolar range. Conclusion: Compound 2 is reported for first time from P. alopecuroides. Isolated coumarins show no antiproliferative activity, whilst among flavonoids compound 5 showed the best antiproliferative activity.

}, keywords = {4{\textasciiacute}-dihydroxy-7-(γ, 5, Antiproliferative activities, Coumarins, Flavonoids, Pterocaulon alopecuroides, γ-dimethylallyloxy)dihydroflavonol}, doi = {10.5530/pj.2019.11.78}, author = {Qu{\'\i}rico A Castillo and Jos{\'e} M. Padr{\'o}n and Anastacio Emiliano} } @article {1527, title = {Phytochemical Investigation, Antioxidant and Antifungal Activities of Rhizomes of Euphorbia Fusiformis}, journal = {Pharmacognosy Journal}, volume = {6}, year = {2014}, month = {26th May 2014}, pages = {78-82}, type = {Research Article}, abstract = {

Objective: Isolation of compounds from Euphorbia fusiformis rhizomes and evaluation of extracts and each isolates for its antioxidant and antifungal activities. Results: Five compounds were isolated including Euphol 1, \β-Sitosterol 2, Caudicifolin 3, Scoparone 4 and Scopoletin 5. The occurrence of the compounds 2, 4 and 5 in the herb reported here for the first time. The ethyl acetate extract showed significant antioxidant activity (IC50 = 2.781 mg/ml) and its yielded compound 3 showed moderate antioxidant activity (IC50 = 3.25 mg/ml) using DPPH method. The ethyl acetate extract showed better antifungal activity against Aspergillus niger and Candida albicans. Conclusion: Compounds 2, 4, 5 were isolated first time from this plant. The ethyl acetate extract showed significant antioxidant and antifungal activity against A. nigar and C. Albicans. Thus, this study concludes by demonstrating the isolation, characterization, antioxidant and antifungal properties of E. fusiformis, which may have further therapeutic value.

Key Words:Euphorbia fusiformis, coumarins, antioxidant activity, antifungal activity.

}, keywords = {Antifungal activity, antioxidant activity, Coumarins, Euphorbia fusiformis}, author = {Ponnam Devendar and K.V.N. Satya Srinivas and J. Kotesh Kumar and T. Sandeep Kumar and Savita Bhagel and K.P. Sastry} }