Preconditioning triggers endogenous protection against subsequent exposure to higher concentrations of a neurotoxin. In this study, we investigated whether exposure to oleanolic acid (OA) enhances the protective effects of preconditioning on PC12 cells exposed to 6-hydroxydopamine (6-OHDA). A concentration response curve was constructed using 6-OHDA (50, 150, 300, and 600 μM). The experiment co...

1. Experiments were done on isolated tissues from mice injected with 0.9% w/v NaCl solution (saline), 6-hydroxydopamine (6-OHDA), nerve-growth-factor antiserum (NGF-As) or a combination of these agents (NGF-As+6-OHDA).2. Fluorescence histochemistry of vasa deferentia showed clear differences between each of the treatments but no such distinction was possible in cardiac ventricle or intestine.3....

Human albumin has recently been demonstrated to protect brain neurons from injury in rat ischemic brain. However, there is no information available about whether human albumin can prevent loss of tyrosine hydroxylase (TH) expression of dopaminergic (DA) neurons induced by 6-hydroxydopamine (6-OHDA) toxicity that is most commonly used to create a rat model of Parkinson's disease (PD). In the pre...

BACKGROUND: The development of effective drug delivery to the central nervous system still remains an important problem in pharmacology despite rapid a large number new treatment strategies recent years. Recently interest intranasal method as route has greatly increased because this administration allows bypass blood-brain barrier. There is not single fundamental study comparing intranasal, and...

The present study evaluated whether the unilateral 6-hydroxydopamine (6-OHDA) model of Parkinson's disease produces autonomic deficits. Autonomic parameters were assessed by implanting a small radiofrequency telemetry device which measured heart rate variability (HRV), diurnal rhythms of heart rate (HR), core body temperature (cBT) and locomotor activity (LA). Rats then received 6-OHDA lesion o...

OBJECTIVES The incidence of Parkinson's disease (PD) is increasing as the global population ages. 6-hydroxydopamine (6-OHDA) can induce PD-like neuropathology and biochemical changes in both in vitro and in vivo models. Therefore, clarification of the molecular mechanism of 6-OHDA-induced cell death might contribute to the understanding of the pathogenesis of PD. METHODS With this goal in min...

Cellular stress may stimulate cell survival pathways or cell death depending on its severity. 6-Hydroxydopamine (6-OHDA) is a neurotoxin that targets dopaminergic neurons that is often used to induce neuronal cell death in models of Parkinson's disease. Here we present evidence that 6-OHDA induces apoptosis in rat PC12 cells that involves release of cytochrome c and Smac/Diablo from mitochondri...

(1S, 2E, 4R, 6R,-7E, 11E)-2, 7, 11-cembratriene-4, 6-diol (4R) is one of the cembranoids found in tobacco leaves. Previous studies have found that 4R protected acute rat hippocampal slices against neurotoxicity induced by N-methyl-D-aspartate (NMDA) and against the toxic organophosphorus compounds paraoxon and diisopropylfluorophosphate (DFP). Furthermore, in vivo, 4R reduced the infarct size i...

Locomotor responses caused by dopamine receptor agonists with presumed specificity for D-1 or D-2 receptor subtypes were compared to apomorphine-induced locomotion in neonatally and adult 6-hydroxydopamine (6-OHDA)-treated rats. In adult 6-OHDA-treated rats, apomorphine and the D-2 agonist, LY-171555, produced a marked, dose-related increase in locomotor activity. Increases in locomotion observ...

Rheum turkestanicum Janisch Root Extract Mitigates 6-OHDA-Induced Neuronal Toxicity Against Human Neuroblastoma SH-SY5Y Cells