C-Isoprenylation of Flavonoids Enhances Binding Affinity toward P-Glycoprotein and Modulation of Cancer Cell Chemoresistance
摘要:
Previous studies have shown that flavones bind to P-glycoprotein (Pgp) with higher affinity than isoflavones, flavanones, and glycosylated derivatives. In the present work, a series of C- or O-substituted hydrophobic derivatives of chrysin were synthesized to further investigate structural requirements of the A ring toward Pgp modulation. Increasing hydrophobicity at either position 6, 8, or 7 increased the affinity of in vitro binding to a purified cytosolic domain of Pgp, but only benzyl and 3,3-dimethylallyl C-substitution produced a high maximal quenching of the protein intrinsic fluorescence. Inhibition of membrane Pgp within leukemic cells, characterized by intracellular drug accumulation, was specifically produced by isoprenylated derivatives, with 8-(3,3-dimethylallyl)chrysin being even more efficient than the commonly used cyclosporin A.
CHALLENGE TEST FOR DIAGNOSING SUBTYPE OF AUTISM SPECTRUM DISEASE
申请人:Stalicla S.A.
公开号:EP3479845A1
公开(公告)日:2019-05-08
The present invention is directed to a method of identifying autism spectrum disorder (ASD) subtype 1 patients, wherein the method comprises: administering an Nrf2-activator to an ASD patient previously diagnosed with ASD or a subject displaying clinical signs of ASD, and identifying the ASD patient as an ASD subtype 1 patient if the patient shows a negative response after administration of the Nrf2-activator. Likewise, the present invention is directed to an Nrf2-activator for use in identifying autism spectrum disorder (ASD) subtype 1 patients, wherein the Nrf2-activator is administered to a subject, wherein the subject is a patient previously diagnosed with ASD or a subject displaying clinical signs of ASD and wherein an ASD subtype 1 patient is identified by a negative response.
Several prenylflavonoids have been synthesised and tested against human tumour cell lines. The prenyl unit has been geranyl or a labdane diterpene. These labdane-flavonoids have been synthesised for the first time. The antitumour activity increase with the prenylation at C-8 position. Twenty-three C and O-prenylated acylphloroglucinols have been synthesised as well. In this case the C-alkylation products have resulted, in general, more active. (C) 2010 Elsevier Masson SAS. All rights reserved.
CHALLENGE TEST FOR DIAGNOSING A SUBTYPE OF AUTISM SPECTRUM DISEASE
申请人:Stalicla S.A.
公开号:EP3706806A1
公开(公告)日:2020-09-16
METABOLIC PROFILING FOR THE DIAGNOSIS OF A SUBSET OF IDIOPATHIC AUTISM SPECTRUM DISORDER PATIENTS, ASD PHENOTYPE 1
申请人:Stalicla S.A.
公开号:EP3877540A1
公开(公告)日:2021-09-15
METHOD OF IDENTIFYING ASD PHENOTYPE 1 PATIENTS
申请人:Stalicla S.A.
公开号:US20190134229A1
公开(公告)日:2019-05-09
The present invention is directed to a method of identifying autism spectrum disorder (ASD) phenotype 1 patients, wherein the method comprises: administering an Nrf2-activator to an ASD patient previously diagnosed with idiopathic ASD or a subject displaying clinical signs of ASD, and identifying the ASD patient as an ASD phenotype 1 patient if the patient shows a negative response after administration of the Nrf2-activator. Likewise, the present invention is directed to a method for classifying autism spectrum disorder (ASD) phenotype 1 patients, the method comprising: administering an Nrf2-activator to a subject, and observing if the subject shows a negative response after administration of the Nrf2-activator, in which the subject is a patient previously diagnosed with idiopathic ASD or a subject displaying clinical signs of ASD and in which the negative response supports classification of the subject as an ASD phenotype 1 patient.