AI Article Synopsis
- Seven new compounds were isolated from the n-butanol-soluble part of a MeOH extract of Streblus asper, along with 15 known compounds.
- The structures of these compounds were determined using spectroscopic methods such as ESI-MS and 2D NMR, while stereochemistry was analyzed through CD spectra and optical rotation data.
- The isolated compounds, particularly magnolol and 9-β-xylopyranosyl-isolariciresinol, showed promising anti-HBV activities in vitro, indicated by their low IC(50) values and lack of cytotoxicity.
Article Abstract
Seven compounds, (7'S,8'S)-trans-streblusol A, (7'R,8'S)-erythro-streblusol B, (7'S,8'S)-threo-streblusol B, 8'R-streblusol C, streblusquinone, (8R,8'R)-streblusol D, and streblusol E, along with 15 known compounds (8-22) were isolated from the n-butanol-soluble part of the MeOH extract of stem bark of Streblus asper. Their structures were elucidated through application of extensive spectroscopic methods, including ESI-MS and 2D NMR spectroscopy (HMQC and HMBC). The stereochemistry at the chiral centers was determined using CD spectra, as well as analyses of coupling constants and optical rotation data. The isolated lignans and allylbenzene derivatives were evaluated for their anti-HBV activities in vitro using the HBV transfected Hep G2.2.15 cell line. The most active compounds, magnolol and 9-β-xylopyranosyl-isolariciresinol, exhibited significant anti-HBV activities with IC(50) values of 2.03 and 6.58μM for secretion of HBsAg, with no cytotoxicity, and of 3.76 and 24.86μM for secretion of HBeAg, with no cytotoxicity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.phytochem.2012.06.023 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Background: Pycnanthus angolensis (Welw) Warb., Myristicaceae, is used extensively in ethnomedicine. Numerous health benefits have being ascribed to the use of different parts of P.
View Article and Find Full Text PDFOptimization of betulinic and ursolic acids and phenolics extraction from endemic Rosa pisiformis using Box-Behnken design in relation to cytotoxic activities.
Sci Rep
January 2025
Section of Botany, Department of Biology, Science Faculty, Ege University, Bornova, İzmir, Turkey.
Despite its important pharmacological bioactivities, betulinic acid is still primarily obtained through extraction from heartwood and bark or synthesized synthetically, with less than 3% efficiency. Our endemic rose species, Rosa pisiformis (Christ.) D.
View Article and Find Full Text PDFBioassay-Guided Isolation and Identification of Antibacterial Compounds from Invasive Tree of Heaven Stem and Trunk Bark.
Molecules
December 2024
Plant Protection Institute, HUN-REN Centre for Agricultural Research, Fehérvári út 132-144, 1116 Budapest, Hungary.
Flash column chromatographic fractionation of tree of heaven () stem and trunk bark extracts, guided by thin-layer chromatography (TLC)- assay and TLC-heated electrospray high-resolution tandem mass spectrometry (HESI-HRMS/MS), lead to the isolation of six known compounds: (9,11)-13-hydroxy-9,11-octadecadienoic acid (13-HODE, ), (10,12)-9-hydroxy-10,12-octadecadienoic acid (9-HODE, ), hexadecanedioic acid (thapsic acid, ), 16-hydroxyhexadecanoic acid (juniperic acid, ), 16-feruloyloxypalmitic acid (alpinagalanate, ), and canthin-6-one (). Their structures were elucidated by HESI-HRMS/MS and one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy. This is the first study identifying - in tree.
View Article and Find Full Text PDFProspect of using ethnobotanicals to manage snakebites in a cost-effective manner: validating Senegalia mellifera extract's inhibitory potential on Naja nigricincta nigricincta (zebra cobra) venom.
Trans R Soc Trop Med Hyg
January 2025
Department of Biology, Chemistry and Physics, Faculty of Health, Natural Resources and Applied Sciences, Namibia University of Science and Technology, Private Bag 13388, 13 Jackson Kaujeua Street Windhoek, Windhoek, Namibia.
Background: Despite Naja nigricincta nigricincta being responsible for most snake envenomation in remote Namibian regions, an effective intervention against its venom remains undiscovered. This study aimed to scientifically validate Namibian folklore claims about Senegalia mellifera extract's efficacy against snake envenomation.
Methods: In vitro assays were conducted to assess the inhibitory potential of S.
as a collective phytomedicine and environmentally sustainable, conservative, and beneficial plant.
Arch Razi Inst
June 2024
School of Life Science, Central University of Karnataka, kalaburagi-585367, Karnataka, India.
Nature is a valuable resource, supplying remedies for the treatment of all diseases. Plant kingdom stands for a plethora of natural compounds that are well known for their utilization in therapeutic applications. They may pave the way for the development of new mediators with appropriate efficacy in many pathological disorders in the future.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!