Novel Dipeptides incorporating selenoamino acids with enhanced bioavailability- Synthesis, pharmaceutical and cosmeceutical applications thereof
申请人:Majeed Muhammed
公开号:US20080026017A1
公开(公告)日:2008-01-31
Disclosed is a novel synthetic method for isomeric peptides through an appropriate linkage of L-selenomethionine or Se-Methyl-L-selenocysteine with L-glutamic acid. The novel synthetic method produces isomeric peptides of L-selenomethionine or Se-Methyl-L-selenocysteine that exhibit (i) enhanced water solubility; (ii) enhanced rate of dissolution in water; (iii) enhanced bioavailability; (iv) excellent vascular endothelial growth factor promoting activity; (v) excellent anti-5-alpha-reductase activity; (vi) capabilities to prevent/reduce “hair fall” and promote “hair growth”, thereby maintaining a perfect homeostasis for “hair care”. Cosmeceutical and pharmaceutical compositions comprising the isomeric peptides obtained through an appropriate linkage of L-selenomethionine or Se-Methyl-L-selenocysteine with L-glutamic acid are also disclosed. Other dipeptides with several other amino acids and uses thereof are also disclosed.
Curcuminoids have been reported to possess multiple bioactivities, such as antioxidant, anticancer and anti-inflammatory properties. Three novel series of curcuminoid derivatives (11a–h, 15a–h and 19a–d) with enhanced bioactivity have been synthesized. Among the synthesized compounds, 11b exhibited the most significant activity with an MIC of 0.5 µM /mL against selected medically important Gram-positive
total of forty novel glycyrrhetinic acid (GA) derivatives were designed and synthesized. The cytotoxic activity of the novel compounds was tested against two human breast cancer cell lines (MCF-7, MDA-MB-231) in vitro by the MTT method. The evaluation results revealed that, in comparison with GA, compound 42 shows the most promising anticanceractivity (IC50 1.88 ± 0.20 and 1.37 ± 0.18 μM for MCF-7
Concise syntheses of L-selenomethionine and of L-selenocystine using radical chain reactions
作者:Derek H.R. Barton、Dominique Bridon、Yolande Hervé、Pierre Potier、Josiane Thierry、Samir Z. Zard
DOI:10.1016/s0040-4020(01)88049-2
日期:1986.1
from (e.g. ) in the presence of dimethyldiselenide provided the protected L-selenomethionine directly. We have shown that triselenocyanide Se3(CN)2 can serve as an efficient selenocyanating agent for radicals; the selenocyanide group is a good precursor for the diselenide moiety of L-selenocystine.