The aim of the present study was to synthesize isoflavone-enaminones 3a-c and 7-alkoxy-isoflavones 4a-c, evaluate their inhibition ?-glucosidase, analyze bioisosteric effect presence versus absence aromatic moieties in these benzopyran derivatives. All test compounds exhibited greater ?-glucosidase than positive control acarbose. series isoflavones 4a-c showed higher inhibitory activity (IC50 =...

We determined if soy isoflavones have dose-related estrogenic and methylation effects. Thirty-four healthy premenopausal women were randomized to 40 mg or 140 mg isoflavones daily through one menstrual cycle. Breast specific and systemic estrogenic effects were assessed measuring the estrogenic marker complement (C)3 and changes in cytology, whereas methylation assessment of 5 cancer related ge...

There has been much recent interest in the cardiovascular benefits of dietary isoflavones. The aim of the present in vitro studies was to investigate potential anti-thrombogenic and anti-atherogenic effects of the isoflavones genistein and daidzein in platelets, macrophages and endothelial cells. Pre-treatment with either isoflavone inhibited collagen-induced platelet aggregation in a dose-depe...

Three experiments were conducted to characterize the metabolism of isoflavones from soy milk in women: two meals in 2 wk separated by a 1-wk washout period (Experiment 1), one meal feeding (Experiment 2) and six consecutive days of feeding (Experiment 3). Urine and plasma samples were extracted directly or predigested before extraction with H-2 beta-glucuronidase/sulfatase or B-3 beta-glucuroni...

Method development for determination of isoflavones in kudzu was achieved by HPLC/UV/ESI-MSD. Using three kudzu species of Pueraria lobata, P. thomsonii and P. edulis, and analyzing the isoflavones separately by species and from different plant tissues (roots, stems, leaves, flowers and fruits) in each species, a total of 25 isoflavones were identified by their molecular ions and characteristic...

The soy isoflavones daidzein and genistein produce several biological activities related to health benefits. A number of isoflavone extracts are commercially available, but there is little information concerning the specific isoflavone content of these products or differences in their bioavailability and pharmacokinetics. This study describes the development and validation of an analytical meth...

To examine the hormonal effects of isoflavones, of which soyabean is a rich source, fifteen healthy nonvegetarian premenopausal women were studied over 9 months. They lived in a metabolic suite for between 4 and 6 months where their diet and activity levels were kept constant and their hormonal status was measured over two or three menstrual cycles. During one (control) menstrual cycle a normal...

background irritable bowel syndrome (ibs) is one of the common gastrointestinal disorders with unknown etiology. in experimental models, it is proposed that soy isoflavones may suppress the clinical and psychological symptoms of ibs by alteration of gut barrier tight junctions. methods we conducted this study to evaluate the effects of soy isoflavones on ibs symptoms and patients’ quality of li...

The isoflavone profiles of seeds of various soybean genotypes with different levels of shade tolerance at the seedling stage were investigated. High-performance liquid chromatography (HPLC) was used to quantify 12 isoflavones, and the data were analyzed using a multivariate statistical analysis. Combined with field experimental data and an orthogonal partial least-squares discriminant analysis ...

Based on the evidence from epidemiological, animal, in vitro data and human clinical trials, it is evident that isoflavones are promising agents for breast cancer chemoprevention. It is also evident that the form of isoflavone used (purified vs soy products), dose of isoflavone used (low vs high), timing and duration of exposure of isoflavones appears to play a major role in determining agonist...