Phenolic Bis-styrylbenzenes as β-Amyloid Binding Ligands and Free Radical Scavengers
摘要:
Starting from bisphenolic bis-styrylbenzene DF-9 (4), P-amyloid (A beta) binding affinity and specificity for phenolic bis-styrylbenzenes, monostyrylbenzenes, and alkyne controls were determined by fluorescence titration with beta-amyloid peptide A beta(1-40) and a fluorescence assay using APP/PSI transgenic mouse brain sections. Bis-styrylbenzene SA R is derived largely from work on symmetrical compounds. This study is the first to describe A beta binding data for bis-styrylbenzenes unsymmetrical in the outer rings. With one exception, binding affinity and specificity were decreased by adding and/or changing the substitution pattern of phenol functional groups, changing the orientation about the central phenyl ring, replacing the alkene with alkyne bonds, or eliminating the central phenyl ring. The only compound with an A beta binding affinity and specificity comparable to 4 was its 3-hydroxy regioisomer 8. Like 4, 8 crossed the blood brain barrier and bound to A beta plaques in vivo. By use of a DPPH assay, phenol functional groups with papa orientations seem to be a necessary. but insufficient, criterion for good free radical scavenging properties in these compounds.
Phenolic Bis-styrylbenzenes as β-Amyloid Binding Ligands and Free Radical Scavengers
摘要:
Starting from bisphenolic bis-styrylbenzene DF-9 (4), P-amyloid (A beta) binding affinity and specificity for phenolic bis-styrylbenzenes, monostyrylbenzenes, and alkyne controls were determined by fluorescence titration with beta-amyloid peptide A beta(1-40) and a fluorescence assay using APP/PSI transgenic mouse brain sections. Bis-styrylbenzene SA R is derived largely from work on symmetrical compounds. This study is the first to describe A beta binding data for bis-styrylbenzenes unsymmetrical in the outer rings. With one exception, binding affinity and specificity were decreased by adding and/or changing the substitution pattern of phenol functional groups, changing the orientation about the central phenyl ring, replacing the alkene with alkyne bonds, or eliminating the central phenyl ring. The only compound with an A beta binding affinity and specificity comparable to 4 was its 3-hydroxy regioisomer 8. Like 4, 8 crossed the blood brain barrier and bound to A beta plaques in vivo. By use of a DPPH assay, phenol functional groups with papa orientations seem to be a necessary. but insufficient, criterion for good free radical scavenging properties in these compounds.
Annonaceousacetogenins are a large family of naturally occurring polyketides exhibiting remarkable anticancer activities. The first generation of annonaceousacetogenin mimetic (1, AA005) exhibits comparable activity as that of natural products and presents much higher selectivity between cancer and normal cells. In this work, we report the design, synthesis, and evaluation of a new series of compound
Ailanthoidol Derivatives and their Anti-inflammatory Effects
作者:Na-Li Lee、Jae-Jun Lee、Jin-Kyung Kim、Jong-Gab Jun
DOI:10.5012/bkcs.2012.33.6.1907
日期:2012.6.20
Ailanthoidol showed a strong $anti$-inflammatory effect in a previous result. Ailanthoidol derivatives were prepared for the $anti$-inflammatory test using Sonogashira coupling, iodine induced cyclization and Wittig reaction. $Anti$-inflammatory effects of the prepared ailanthoidol derivatives were examined in lipopolysaccharide (LPS)-stimulated RAW 264-7 macrophages. The results showed that some ailanthoidol derivatives inhibited significantly the production of inflammatory mediator nitric oxide.
Compositions and methods for glucose transport inhibition
申请人:OHIO UNIVERSITY
公开号:US10000443B2
公开(公告)日:2018-06-19
Glucose deprivation is an attractive strategy in cancer research and treatment. Cancer cells upregulate glucose uptake and metabolism for maintaining accelerated growth and proliferation rates. Specifically blocking these processes is likely to provide new insights to the role of glucose transport and metabolism in tumorigenesis, as well as in apoptosis. As solid tumors outgrow the surrounding vasculature, they encounter microenvironments with a limited supply of nutrients leading to a glucose deprived environment in some regions of the tumor. Cancer cells living in the glucose deprived environment undergo changes to prevent glucose deprivation-induced apoptosis. Knowing how cancer cells evade apoptosis induction is also likely to yield valuable information and knowledge of how to overcome the resistance to apoptosis induction in cancer cells. Disclosed herein are novel anticancer compounds that inhibit basal glucose transport, resulting in tumor suppression and new methods for the study of glucose deprivation in animal cancer research.
Novel Stereo‐Induction Pattern in Pudovik Addition/Phospha‐Brook Rearrangement Towards Chiral Trisubstituted Allenes
作者:Jia‐Yan Zheng、Fan Wang、Yan Zhang、Zheng Zheng、Jia‐Hong Wu、Xiaoyu Ren、Zhishan Su、Wenchuan Chen、Tianli Wang
DOI:10.1002/anie.202403707
日期:2024.5.27
developed to synthesize axially chiral phosphorus allenes through a PPS-catalyzed asymmetric Pudovik addition followed by phospha-Brook rearrangement. Mechanistic experiments have demonstrated that the enantio-determining step is the 1,2-addition, with the subsequent rearrangement undergoing a central-to-axial chirality transfer.
COMPOSITIONS AND METHODS FOR GLUCOSE TRANSPORT INHIBITION
申请人:Chen Xiaozhuo
公开号:US20120121536A1
公开(公告)日:2012-05-17
Glucose deprivation is an attractive strategy in cancer research and treatment. Cancer cells upregulate glucose uptake and metabolism for maintaining accelerated growth and proliferation rates. Specifically blocking these processes is likely to provide new insights to the role of glucose transport and metabolism in tumorigenesis, as well as in apoptosis. As solid tumors outgrow the surrounding vasculature, they encounter microenvironments with a limited supply of nutrients leading to a glucose deprived environment in some regions of the tumor. Cancer cells living in the glucose deprived environment undergo changes to prevent glucose deprivation-induced apoptosis. Knowing how cancer cells evade apoptosis induction is also likely to yield valuable information and knowledge of how to overcome the resistance to apoptosis induction in cancer cells. Disclosed herein are novel anticancer compounds that inhibit basal glucose transport, resulting in tumor suppression and new methods for the study of glucose deprivation in animal cancer research.