Effect of silibinin and trans-chalcone in an Alzheimer's disease-like model generated by insulin amyloids

被引:0
|
作者
Omidi-Shahsavandi, M. [1 ]
Yaghmaei, P. [1 ]
Ahmadian, S. [2 ]
Ebrahim-Habibi, A. [3 ,4 ]
机构
[1] Islamic Azad Univ, Fac Basic Sci, Dept Biol, Sci & Res Branch, Tehran, Iran
[2] Univ Tehran, Inst Biochem & Biophys, Tehran, Iran
[3] Univ Tehran Med Sci, Endocrinol & Metab Mol Cellular Sci Inst, Biosensor Res Ctr, Tehran, Iran
[4] Univ Tehran Med Sci, Endocrinol & Metab Clin Sci Inst, Endocrinol & Metab Res Ctr, Tehran, Iran
关键词
Alzheimer?s disease; Amyloid; Fibril inhibitor; Hippocampus; Insulin; Silibinin; IN-VIVO; FIBRILS; PROTEIN; FIBRILLATION; AGGREGATION; INHIBITION; IMPAIRMENT; INJECTION; PATHOLOGY; OLIGOMERS;
D O I
10.1590/1414-431X2023e12443
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Amyloid fibrils are characteristic of several disorders including Alzheimer's disease (AD), with no cure or preventive therapy. Diminishing amyloid deposits using aromatic compounds is an interesting approach toward AD treatment. The present study examined the anti-fibrillogenic effects of silibinin and trans-chalcone in vitro, in vivo, and in silico on insulin amyloids. In vitro incubation of insulin at 37 degrees C for 24 h induced amyloid formation. Addition of trans-chalcone and silibinin to insulin led to reduced amounts of fibrils as shown by thioflavin S fluorescence and Congo red absorption spectroscopy, with a better effect observed for silibinin. In vivo bilateral injection of fibrils formed by incubation of insulin in the presence or absence of silibinin and trans-chalcone or insulin fibrils plus the compounds in rats' hippocampus was performed to obtain AD characteristics. Passive avoidance (PA) test showed that treatment with both compounds efficiently increased latency compared with the model group. Histological investigation of the hippocampus in the cornu ammonis (CA1) and dentate gyrus (DG) regions of the rat's brain stained with hematoxylin-eosin and thioflavin S showed an inhibitory effect on amyloid aggregation and markedly reduced amyloid plaques. In silico, a docking experiment on native and fibrillar forms of insulin provided an insight onto the possible binding site of the compounds. In conclusion, these small aromatic compounds are suggested to have a protective effect on AD.
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页数:13
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