Pro-inflammatory complement activation by the Aβ peptide of Alzheimer’s disease is biologically significant and can be blocked by vaccinia virus complement control protein

1998 ◽  
Vol 19 (6) ◽  
pp. 619-627 ◽  
Author(s):  
James Daly ◽  
Girish J Kotwal
2019 ◽  
Vol 13 ◽  
pp. 117906951986618 ◽  
Author(s):  
Suresh Kumar ◽  
Shivani Kumar ◽  
Heera Ram

Amyloidogenesis is the process in which amyloid beta (Aβ) peptide aggregation results in plaque formation in central nervous system (CNS) are associated with many neurological diseases such as Alzheimer’s disease. The peptide aggregation initiated from peptide monomers results in formation of dimers, tetramers, fibrils, and protofibrils. The ability of allicin, a lipid-soluble volatile organosulfur biological compound, present in freshly crushed garlic ( Allium sativum L.) to inhibit fibril formation by the Aβ peptide in vitro was investigated in the present study. Inhibition of fibrillogenesis was measured by a Thioflavin T (ThT) fluorescence assay and visualized by transmission electron microscopy (TEM). The molecular interaction between allicin and Aβ peptide was also demonstrated by in silico studies. The results show that allicin strongly inhibited Aβ fibrils by 97% at 300 µM, compared with control (Aβ only) ( P < .001). These results were further validated by visual of fibril formation by transmission microscopy and molecular interaction of amyloid peptide with allicin by molecular docking. Aβ forms favourable hydrophobic interaction with Ile32, Met35, Val36, and Val39, and oxygen of allicin forms hydrogen bond with the amino acid residue Lys28. Allicin anti-amyloidogenic property suggests that this naturally occurring compound may have potential to ameliorate and prevent Alzheimer’s disease.


Vaccine ◽  
2011 ◽  
Vol 29 (43) ◽  
pp. 7435-7443 ◽  
Author(s):  
John Bernet ◽  
Muzammil Ahmad ◽  
Jayati Mullick ◽  
Yogesh Panse ◽  
Akhilesh K. Singh ◽  
...  

2021 ◽  
pp. 1-12
Author(s):  
Teslim S. Abdulkadir ◽  
Fatima A. Dawud ◽  
Ahmed Sherif Isa ◽  
Joseph O. Ayo

Background: Alzheimer’s disease (AD) is a neurodegenerative disease associated with deficiency in motor coordination, cognitive impairment, and excessive reactive oxygen species production in the brain. Objective: The study evaluated effects of taurine and camel milk (CM) on neurobehavior, amyloid-beta peptide 1–42 (Aβ) expression, acetylcholinesterase, and superoxide dismutase activities in aluminum chloride (AlCl3) model of Alzheimer’s disease in rats. Methods: Thirty-five female Wistar rats were divided into seven groups (n = 5): Normal saline (0.2 mL/kg body weight); AlCl3 (100 mg/kg) (AD); CM (33 mL/kg); Taurine (50 mg/kg); AlCl3 (100 mg/kg) + CM (33 mL/kg); AlCl3 (100 mg/kg) + Taurine (50 mg/kg); and AlCl3 (100 mg/kg) + CM (33 mL/kg) + Taurine (50 mg/kg). The administration lasted for eight weeks via oral gavage. After the eighth week, neurobehavior assessments were performed. Rats were sacrificed, and brain and blood samples collected for analysis. Results: There was a significant (p <  0.0001) increase in the duration of motor endurance in AD + CM rats, compared to AD rats. Duration of forced swimming time was lowest (p <  0.0001) in AlCl3 + Taurine rats, compared to that of AD rats. Concentration of Aβ peptide decreased (p <  0.05) in AD rats, treated with CM and/or combination. In taurine-treated rats, superoxide dismutase activity was significantly (p <  0.05) higher than in AD rats. Treatment with taurine + CM increased (p <  0.05) acetylcholinesterase activity compared to controls. Conclusion: Taurine and CM enhanced cognition and sensorimotor activity by decreasing Aβ peptide concentration and increasing superoxide dismutase and acetylcholinesterase activities in AD rats.


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