COMPOSITION FOR DIAGNOSIS OF AMYLOID-RELATED DISEASE
申请人:Nakayama Morio
公开号:US20100278733A1
公开(公告)日:2010-11-04
There is provided a composition comprising a compound represented by general formula (I), wherein R
l
represents a 5-iodothiophen-2-yl group or the like, and R
2
represents a 4-dimethylaminophenyl group or the like. This composition is useful for diagnosis of an amyloid-related disease such as Alzheimer's disease because the compound has high binding specificity to amyloid β protein, high permeability through the blood-brain barrier, and a property of being rapidly eliminated from sites other than senile plaques in the brain.
COMPOSITION FOR DIAGNOSING AMYLOID-RELATED DISEASE
申请人:Nagasaki University
公开号:EP2030635A1
公开(公告)日:2009-03-04
There is provided a composition comprising a compound represented by general formula (I), wherein R1 represents a 5-iodothiophen-2-yl group or the like, and R2 represents a 4-dimethylaminophenyl group or the like. This composition is useful for diagnosis of an amyloid-related disease such as Alzheimer's disease because the compound has high binding specificity to amyloid β protein, high permeability through the blood-brain barrier, and a property of being rapidly eliminated from sites other than senile plaques in the brain.
A series of novel chalcones and their related derivatives were synthesized and evaluated as beta-amyloid imaging probes. In the structure-activity relationship of binding affinities to synthetic A beta(1-42) aggregates, compound 14 displayed the highest binding affinity in vitro. Amyloid plaques in the Alzheimer's model mouse brain were visualized with 14. In biodistribution studies using normal mice, [I-125]14 showed good brain uptake (2.56% ID/g, 2 min postinjection) and rapid washout from the brain (0.21% ID/g, 60 min postinjection). These results suggest that [I-125]14 should be further investigated as a potentially useful P-amyloid imaging probe.
Stilbene–Chalcone Hybrids: Design, Synthesis, and Evaluation as a New Class of Antimalarial Scaffolds That Trigger Cell Death through Stage Specific Apoptosis
作者:Naina Sharma、Dinesh Mohanakrishnan、Amit Shard、Abhishek Sharma、Saima、Arun K. Sinha、Dinkar Sahal
DOI:10.1021/jm201216y
日期:2012.1.12
Novel stilbene-chalcone (S-C) hybrids were synthesized via a sequential Claisen-Schmidt-Knoevenagel-Heck approach and evaluated for antiplasmodial activity in in vitro red cell culture using SYBR Green I assay. The most potent hybrid (11) showed IC50 of 2.2, 1.4, and 6.4 mu M against 3D7 (chloroquine sensitive), Indo, and Dd2 (chloroquine resistant) strains of Plasmodium falciparum, respectively. Interestingly, the respective individual stilbene (IC50 > 100 mu M), chalcone (IC50 = 11.5 mu M), or an equimolar mixture of stilbene and chalcone (IC50 = 32.5 mu M) were less potent than 11. Studies done using specific stage enriched cultures and parasite in continuous culture indicate that 11 and 18 spare the schizont but block the progression of the parasite life cycle at the ring or the trophozoite stages. Further, 11 and 18 caused chromatin condensation, DNA fragmentation, and loss of mitochondrial membrane potential in Plasmodium falciparum, thereby suggesting their ability to cause apoptosis in malaria parasite.