Title:In silico, In vitro, and In vivo Evaluation of the Anti-alzheimer’s Activity of Berberine
Volume: 20
Issue: 3
Author(s): Louise T. Theunis*, Junie B. Billones, Chung-Der Hsiao, Oliver B. Villaflores and Agnes L. Llamasares-Castillo*
Affiliation:
- Pharmacy Cluster, The Graduate School, University of Santo Tomas, Manila, Philippines
- Pharmacy Cluster, The Graduate School, University of Santo Tomas, Manila, Philippines
- Faculty of Pharmacy, University of Santo Tomas, Manila, Philippines
- Research Center for the Natural and Applied
Sciences, University of Santo Tomas, Manila, Philippines
Keywords:
Acetylcholinesterase inhibition, Alzheimer’s disease, berberine, inhibitory avoidance, tumor necrosis factor-alpha inhibition, zebrafish, beta-amyloid, autodock vina.
Abstract:
Background: Alzheimer’s disease (AD), a progressive neurodegenerative disease for
which there is no effective cure is among the leading causes of death worldwide.
Objectives: To investigate the potential anti-AD activity of berberine (BBR).
Methods: In silico assessment included molecular docking and ADMET prediction. BBR’s in vitro
inhibitory activity of the target selected from docking results was assessed via colorimetric inhibitor
screening assay. BBR’s LC50 in adult zebrafish was determined via an Acute Toxicity Study. ZnCl2
concentration for AD induction was determined via toxicity study and T-maze test. Finally, zebrafish
were treated with ZnCl2 alone or simultaneously with either BBR or donepezil and assessed via the
inhibitory avoidance task, followed by ELISA of AD-related biomarker levels in brain tissue.
Results: The in silico assessment showed BBR’s desirable drug properties and binding affinity on
selected AD-related targets, which was the greatest docking score with AChE. The in vitro IC50 on
AChE was 3.45 μM. The LC50 in adult zebrafish was calculated at 366 ppm. In the T-maze test,
ZnCl2 at 2.5 ppm caused the greatest cognitive impairment accompanied by moderate freezing. In the
inhibitory avoidance test, fish treated with either 100 ppm BBR or 2.5 ppm donepezil had
significantly better performance than ZnCl2-treated fish. ZnCl2-treated zebrafish brain tissue had the
highest Aβ levels and AChE activity of all groups, but these were significantly lower in donepeziland
BBR-treated fish. ZnCl2- and donepezil-treated fish had similar TNF-α levels, whereas BBR
treatment significantly lowered them close to those of untreated fish.
Conclusion: BBR showed anti-amyloidogenic, anti-AChE, and anti-inflammatory effects, which
support its potential use in AD therapy.