@article{MTMT:2512463, title = {Volatile Glycosides from the Leaves of Morus alba with a Potential Contribution to the Complex Anti-diabetic Activity}, url = {https://m2.mtmt.hu/api/publication/2512463}, author = {Hunyadi, Attila and Herke, I and Veres, Katalin and Erdei, Anna and Simon, András and Tóth, Gábor}, doi = {10.1177/1934578x1400900201}, journal-iso = {NAT PROD COMMUN}, journal = {NATURAL PRODUCT COMMUNICATIONS}, volume = {9}, unique-id = {2512463}, issn = {1934-578X}, abstract = {The leaves and root bark of Morus alba, the white mulberry tree, are well-known traditional medicines for the treatment of type II diabetes. Several different types of constituents have been suggested to be responsible for the anti-diabetic activity of mulberry drugs, such as iminosugars, flavonoids and other phenolic compounds, glycopeptides and ecdysteroids. Our group recently suggested that a volatile-oil like fraction of the hot water extract of M. alba leaves, containing several phenyl-propane derivatives, can increase the glucose consumption of adipocytes. Here we report the isolation of three glycosylated volatile constituents from mulberry leaves, two megastigmane derivatives along with the β-D-glucoside of eugenol. Furthermore, a commercially available mixture of probiotic bacteria was assessed to study the effect of the intestinal flora on the megastigmane derivatives. Significant amounts of the aglycons of both compounds were liberated, suggesting that these compounds can be metabolized in the large intestines and absorbed without the sugar moiety after the consumption of a traditional mulberry tea. Based on literature data, both the glycosides and their aglycons have a potential contribution to the beneficial effects of mulberry leaves in type 2 diabetes.}, year = {2014}, eissn = {1555-9475}, pages = {145-147}, orcid-numbers = {Hunyadi, Attila/0000-0003-0074-3472; Veres, Katalin/0000-0001-7108-3622} } @article{MTMT:2102858, title = {In vitro Anti‐diabetic Activity and Chemical Characterization of an Apolar Fraction of Morus alba Leaf Water Extract}, url = {https://m2.mtmt.hu/api/publication/2102858}, author = {Hunyadi, Attila and Veres, Katalin and Dankó, Balázs Ödön and Kele, Zoltán and Wéber, Edit and Hetényi, Anasztázia and Zupkó, István and Hsieh, TJ}, doi = {10.1002/ptr.4803}, journal-iso = {PHYTOTHER RES}, journal = {PHYTOTHERAPY RESEARCH}, volume = {27}, unique-id = {2102858}, issn = {0951-418X}, abstract = {The tea from the white mulberry (Morus alba L.) leaf is a worldwide known traditional medicine of type II diabetes. Here, we report the investigation of the dichloromethane-soluble fraction obtained in a 0.24% m/m yield from the hot water extract of mulberry leaves. A significant, dose-dependent activity was found by means of the 24-h glucose consumption of fully differentiated adipocytes both in the absence and presence of insulin. The fraction was characterized by HPLC-DAD, GC-MS and GC-FID. The main constituent (40.3% by means of GC-FID) was isolated and identified as loliolide by EIMS, HRESIMS and NMR spectroscopy. In the active fraction benzyl alcohol, ethyl benzoate, t-cinnamic acid, p-hydroxyacetophenone, t-coniferyl alcohol and synapil alcohol were also identified by GC-MS and quantified by GC-FID (0.7, 1.3, 1.5, 2.9, 7.5 and 2.6%, respectively). Copyright (c) 2012 John Wiley & Sons, Ltd.}, keywords = {Diabetes; BLOOD-GLUCOSE; CONSTITUENTS; Chemistry, Medicinal; Morus alba; mulberry; anti-diabetic; loliolide; loliolide}, year = {2013}, eissn = {1099-1573}, pages = {847-851}, orcid-numbers = {Hunyadi, Attila/0000-0003-0074-3472; Veres, Katalin/0000-0001-7108-3622; Kele, Zoltán/0000-0002-4401-0302; Wéber, Edit/0000-0002-5904-0619; Hetényi, Anasztázia/0000-0001-8080-6992; Zupkó, István/0000-0003-3243-5300} }