Publications by authors named "Mariana Nejm"

Classified as the second most common neurodegenerative disorder associated with aging after Alzheimer's disease, Parkinson's disease (PD) is the most common movement disorder. In the last decade, despite advances in treatment, mortality rates linked with PD continued to reach significant figures. Available studies have shown that compared with healthy controls, patients with PD are accompanied by high rates of premature death.

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Generalized tonic-clonic seizures (GTCS) are the main risk factor for sudden unexpected death in epilepsy (SUDEP). Also, among the several mechanisms underlying SUDEP there is the cardiac dysfunction. So, we aimed to evaluate the impact of the number of seizures on heart function and morphology in rats with epilepsy.

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The global burden of chronic disorders such as Parkinson's disease (PD) has rapidly increased over recent decades. Despite an increasing understanding of PD pathophysiology, there are no effective therapies capable of stopping or slowing the progression of this neurological condition. It has been suggested that type 2 diabetes mellitus (T2DM) may be a risk factor for PD and comorbid T2DM may worsen PD symptoms, as well as accelerate neurodegeneration.

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•Hypercoagulability may predispose COVID-19 patients to thromboembolic complications.•Movement disorders may develop as complications of vascular events and infections.•Health professionals should be vigilant for abnormal movements in COVID-19 patients.

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Background: Cardiovascular dysfunctions are common non-motor symptoms in patients with Parkinson's disease (PD) that can result in reduced quality of life and even death. Research in animal models designed to characterize the pathological association between PD and cardiovascular abnormalities is still in its infancy. This study assessed the early impact of the nigrostriatal dopaminergic damage on cardiological features in the unilateral 6-OHDA rat model of PD.

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Heavy metal contamination in aquatic environments plays an important role in the exposure of humans to these toxicants. Among these pollutants, mercury (Hg) is one main concern due to its high neurotoxicity and environmental persistence. Even in low concentrations, Hg bioaccumulation is a major threat to human health, with higher impact on populations whose diet has fish as chief consumption.

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Parkinson's disease (PD) is one of the most common age-related neurodegenerative disorders. Epidemiological studies have demonstrated that PD is accompanied by high rates of premature death compared with the general population. The main causes of deaths are related to pneumonia and cardiovascular diseases.

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Sudden unexpected death in epilepsy (SUDEP) is a major cause of premature death related to epilepsy. The causes of SUDEP remain unknown, but cardiac arrhythmias and asphyxia have been suggested as a major mechanism of this event. Inflammation has been implicated in the pathogenesis of both epilepsy and ventricular arrhythmia, with interleukin-6 (IL-6) being recognized as a crucial orchestrator of inflammatory states.

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Article Synopsis
  • The study investigates how sleep restriction in young rats affects their metabolism and weight, aiming to shed light on the link between sleep loss and obesity.
  • Key findings reveal that while sleep-restricted rats initially gained less weight and body fat, after recovery, they showed increased energy storage and efficiency, suggesting potential long-term metabolic changes.
  • Understanding these mechanisms could help explain how sleep curtailment is associated with obesity in both children and adults, highlighting the importance of sleep for healthy development.
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During the epileptogenic process, several events may occur, such as an important activation of the immune system in the central nervous system. The response to seizure activity results in an inflammation in the brain as well as in the periphery. Moreover, CRP and cytokines may be able to interact with numerous ligands in response to cardiac injury caused by sympathetic stimulation in ictal and postictal states.

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Temporal lobe epilepsy (TLE), the most common form of epilepsy is often resistant to pharmacological treatment. Neuronal loss observed in epileptic brain may be result of an overproduction of free radicals (oxidative stress). Oxidative stress is characterized by an imbalance between antioxidant defenses and oxidizing agents (free radicals), which can lead to tissue injury.

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Article Synopsis
  • The study investigated how maternal obesity, caused by lesions in a specific part of the brain, affects the metabolism of their offspring.
  • Offspring from obese mothers had higher body weight and food intake compared to those from control mothers, and were more affected by a high-calorie diet, leading to increased body fat.
  • Findings suggest that maternal obesity can lead to long-term overweight in offspring, indicating possible programming effects during fetal development.
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Objectives: We studied the effects of Hip-deep brain stimulation (DBS) on the expression of the inducible transcription factor c-FOS in the brain of normal rats.

Materials And Methods: Ten Wistar rats were anesthetized, and nine were implanted with epidural and hippocampal electrodes for brain activity recording; one animal was used as sham. Bipolar stimulating electrodes were implanted in the left hippocampus.

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