Depression is a frequent comorbid disorder in Parkinson's disease (PD) which may precede appearance of its motor symptoms by several years. Pathomechanisms underlying PD have been suggested to be responsible for the PD-related depression. The aim of the study was to examine the influence of a partial lesion of striatal dopaminergic terminals on the "depressive-like" behavior of rats in the forc...

Parkinson's disease (PD), a progressive neurological pathology, presents motor and nonmotor impairments. The objectives were to support data on exercise benefits to PD. Male Wistar rats were distributed into sham-operated (SO) and 6-OHDA-lesioned, both groups without and with exercise. The animals were subjected to treadmill exercises (14 days), 24 h after the stereotaxic surgery and striatal 6...

It is important to elucidate the mechanism of dysautonomias in patients with Parkinson's disease; therefore, this study aimed to investigate the cardiovascular and autonomic changes that occur in an animal model of Parkinsonism. Adult male Wistar rats were anesthetized before bilateral microinfusions of 6-hydroxydopamine (6-OHDA) into the substantia nigra. The sham group underwent the same surg...

A novel bis-lipoyl derivative containing 8-hydroxyquinoline scaffold (LA-HQ-LA, 5) was synthesized as a new multifunctional drug candidate with antioxidant, chelant, and neuroprotective properties for the treatment of neurodegenerative diseases. We have investigated the potential effectiveness of LA-HQ-LA against the cytotoxicity induced by 6-OHDA and H2O2 on human neuroblastoma SH-SY5Y cell li...

Background and Objective: Parkinson’s disease (PD) is a rather common neurological disorder in elders that is due to degeneration of dopaminergic neurons within mesencephalic substantia nigra pars compacta. With regard to protective and antioxidant effect of simvastatin, this study was conducted to evaluate its neuroprotective effect in an experimental model of PD. Materials and Methods: In thi...

Peroxynitrite formation has been demonstrated in several neurodegenerative disorders; thus far, protein nitration and consequent alterations in protein function are implicated as mechanistic events. Free 3-nitrotyrosine (free-3NT) is also elevated in these settings; a neurotoxic role for this modified amino acid has not been investigated. We tested the hypothesis that free-3NT is neurotoxic in ...

Non-motor symptoms, including psychiatric disorders, are increasingly recognized as a major challenge in the treatment of Parkinson's disease (PD). These ailments, which often appear in the early stage of the disease, affect a large number of patients and are only partly resolved by conventional antiparkinsonian medications, such as L-DOPA. Here, we investigated non-motor symptoms of PD in a mo...

1. The effects of chemical sympathectomy with 6-hydroxydopamine (6-OHDA) on the cardiovascular system of the rat were compared in, (a) 10-week-old rats treated during the first 14 days after birth with 150 mug/g subcutaneously, and (b) adult rats injected intravenously with 2 x 50 mg/kg on day 1 and 2 x 100 mg/kg on day 7 and the experiments performed on day 8.2. Intravenous administration of 6...

we have shown that buspirone, a partial agonist of 5-hydroxytryptamine 1a (5-ht1a) receptors, improves motor dysfunctions induced by 6-hydroxydopamine (6-ohda) and haloperidol in rats. the present work extends these findings by investigating the role of 5-ht1a receptors on catalepsy-like immobilization in rats, a model of parkinson’s disease. catalepsy was induced by unilateral infusion of 6-oh...

Parkinson's disease (PD) is a progressive neurodegenerative disorder with selective loss of dopaminergic neurons in the substantia nigra. Evidence suggests that oxidative stress is involved in the pathogenesis of PD. Sulforaphane (SF), a naturally occurring isothiocyanate, has been shown to protect against oxidative stress by inducing the expressi...