Abstract
Alzheimerʼs disease is a growing general health concern with huge implications for
individuals and society. Beta boswellic acid, a major compound of the Boswellia serrata plant, has long been used for the treatment of various inflammatory diseases. The
exact mechanism of beta boswellic acid action in Alzheimerʼs disease pathogenesis
remains unclear. In the current study, the protective effect of beta boswellic acid
on streptozotocin-induced sporadic Alzheimerʼs disease was surveyed. Alzheimerʼs disease
model was induced using streptozotocin followed by an assessment of the treatment
effects of beta boswellic acid in the presence of streptozotocin. The prevention effect
of beta boswellic acid on Alzheimerʼs disease induction by streptozotocin was evaluated.
Behavioral activities in the treated rats were evaluated. Histological analysis was
performed. Phosphorylation of tau protein at residues Ser396 and Ser404 and the expression
of reelin protein were determined.
Glial fibrillary acidic protein immunofluorescence staining was applied in the
hippocampus regions. Our findings indicated that beta boswellic acid decreased traveled
distance and escape latency in the prevention (beta boswellic acid + streptozotocin)
and treatment (streptozotocin + beta boswellic acid) groups compared to control during
the acquisition test. It increased “time spent” (%) in the target quadrant. Reelin
level was enhanced in rats treated with beta boswellic acid. Tau hyperphosphorylation
(p-tau404) and glial fibrillary acidic protein were decreased in the prevention group
while the expression of reelin protein in both groups was increased. We could suggest
that the anti-inflammatory property of beta boswellic acid is one of the main factors
involving in the improvement of learning and memory in rats. Therefore the antineurodegenerative
effect of beta boswellic acid may be due to its ability to reactivate reelin protein.
Key words hyperphosphorylation of tau - Alzheimerʼs disease - streptozotocin - neuroprotective
- anti-amnesic effect - paired helical filaments