Title:The Effect of Sodium Metabisulphite on Apoptosis in the Experimental Model of Parkinson’s Disease
Volume: 16
Issue: 3
Author(s): Ayse Ozkan, Hande Parlak, Aysel Agar*, Özlem Özsoy, Gamze Tanriover, Sayra Dilmac, Eylem Turgut and Piraye Yargicoglu
Affiliation:
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya,Turkey
Keywords:
6-OHDA, bax, Bcl-2, caspase-3, Parkinson's disease, sulphite.
Abstract:
Background: The aim of this study was to investigate the mechanisms underlying possible
toxic effects of sulphite on neurodegeneration.
Methods: Male Wistar rats were assigned to each of the four groups: Control (Control),
Sulphite-treated (Sulphite), 6-hydroxydopamine (6-OHDA)-injected (6-OHDA), and sulphite-treated
and 6-OHDA-injected (6-OHDA+Sulphite). Sodium metabisulphite was administered orally by
gavage at a dose of 100 mg/kg/day for 45 days. Experimental PD was created stereotactically via the
unilateral infusion of 6-OHDA into the medial forebrain bundle (MFB). Rotarod performances,
plasma S-sulfonate levels, caspase-3 activities, Bax and Bcl-2 levels, tyrosine hydroxylase (TH) and
cleaved caspase-3 double staining were investigated.
Results: The rotarod test showed that the 6-OHDA-injected animals exhibited shorter time on the rod
mile compared to the control group; however, there was no difference between 6-OHDA and
6-OHDA+Sulphite groups. Plasma levels of S-sulfonate in Sulphite and 6-OHDA+ Sulphite groups
increased in contrast to their corresponding control groups. Caspase-3 enzyme activity increased in the
6-OHDA group whereas it did not in control. However, sulphite treatment did not affect these activity
levels. Anti-apoptotic protein Bcl-2 concentration decreased, but the concentration of pro-apoptotic
protein Bax increased in the 6-OHDA group compared to the control group. The expression of
caspase-3 increased, while the number of tyrosine hydroxylase (TH)-positive neurons decreased in
6-OHDA group as compared to the control groups. However, sulphite treatment had no effect on these
parameters.
Conclusion: Sulphite is not a potentially aggravating factor for the activity of caspase-3 in a 6-
OHDA-induced experimental model of Parkinson’s disease.