Cerebrospinal Fluid Levels of 5-Hydroxyindoleacetic Acid in Parkinson's Disease and Atypical Parkinsonian Syndromes.

Background: Various cerebrospinal fluid (CSF) biomarkers are studied in Parkinson's disease (PD) and atypical parkinsonian syndromes (APS). Several studies found reduced 5-hydroxyindoleacetic acid (5-HIAA), the main serotonin metabolite, in PD. There is little evidence regarding its levels in APS.

Premotor Parkinson's disease: Overview of clinical symptoms and current diagnostic methods.

Parkinson's disease (PD) is characterized by typical motor symptoms. However, recent studies show several non-motor features that may precede the development of the motor symptoms of PD. The best known premotor symptoms include hyposmia, REM sleep behavior disorder (RBD), constipation, and depression; other symptoms are excessive daytime somnolence, orthostatic hypotension and symptomatic hypotension, erectile or urinary dysfunction, musculoskeletal symptoms, pain, and global cognitive deficit.

Cerebrospinal Fluid Levels of Chromogranin A in Parkinson's Disease and Multiple System Atrophy.

Background: Chromogranin A (CgA) and other peptides from the chromogranin-secretogranin family have been recently studied as potential biomarkers of various neurodegenerative diseases, including Parkinson's disease (PD).

Methods: We measured CgA in the cerebrospinal fluid (CSF) of 119 PD patients, 18 multiple system atrophy (MSA) patients, and 31 age-matched controls. We also correlated the values with disease duration and levodopa dose equivalent.

Stable isotope dilution ultra-high performance liquid chromatography-tandem mass spectrometry quantitative profiling of tryptophan-related neuroactive substances in human serum and cerebrospinal fluid.

Many compounds related to L-tryptophan (L-TRP) have interesting biological or pharmacological activity, and their abnormal neurotransmission seems to be linked to a wide range of neurodegenerative and psychiatric diseases. A high-throughput method based on ultra-high performance liquid chromatography connected to electrospray tandem mass spectrometry (UHPLC-ESI-MS/MS) was developed for the quantitative analysis of L-TRP and 16 of its metabolites in human serum and cerebrospinal fluid (CSF), representing both major and minor routes of L-TRP catabolism. The combination of a fast LC gradient with selective tandem mass spectrometry enabled accurate analysis of almost 100 samples in 24h.

Clusterin CSF levels in differential diagnosis of neurodegenerative disorders.

Introduction: Clusterin, a heterodimeric glycoprotein, is thought to be involved in many cellular functions, including cell-cell interaction, cell survival and apoptosis. In the brain, post-mortem analysis has found increased clusterin associated with the pathology of many other neurodegenerative diseases (ND) such as Parkinson's disease (PD), dementia with Lewy bodies (DLB), Alzheimer's disease (AD) and multiple system atrophy (MSA). In vivo cerebrospinal fluid (CSF) levels of clusterin in ND diseases may reflect differences in the pathology and thus aid in the differential diagnosis.

Orthostatic hypotension is associated with decreased cerebrospinal fluid levels of chromogranin A in early stage of Parkinson disease.

An association between the CSF chromogranin A (CgA) and orthostatic blood pressure changes was investigated in 20 patients in the early stage of Parkinson disease (PD). There was a positive correlation between the CSF CgA and diastolic blood pressure change, when CSF CgA levels were lower in patients with orthostatic hypotension (OH). Decreased CSF CgA may be useful in predicting OH in the early stage of PD.

Tau protein, beta-amyloid₁₋₄₂ and clusterin CSF levels in the differential diagnosis of Parkinsonian syndrome with dementia.

Background: Parkinson's disease (PD), PD with dementia (PDD) and Lewy body dementia (DLB) are synucleinopathies. PDD and DLB are sometimes considered a transition between PD and Alzheimer dementia (AD). Finding in vivo markers or their combination could help in the differential diagnosis of these neurodegenerative (ND) diseases.

Cerebrospinal fluid levels of chromogranin A in the treatment-naïve early stage Parkinson's disease: a pilot study.

Chromogranin A (CgA) levels in cerebrospinal fluid (CSF) have been reported to be significantly reduced in the later stages of Parkinson's disease (PD). There are only limited data regarding its levels in the early stages, so its significance as a potential biomarker in the diagnosis of PD cannot be established. The aim of our study was to establish the level of CgA in a cohort of treatment-naïve patients with early stage PD.

Tau protein and beta-amyloid(1-42) CSF levels in different phenotypes of Parkinson's disease.

Parkinson's disease (PD) is a neurodegenerative disorder with highly heterogeneous clinical manifestations. This fact has prompted many attempts to divide PD patients into clinical subgroups. This could lead to a better recognition of pathogenesis, improving targeted treatment and the prognosis of PD patients.

CSF markers of neurodegeneration in Parkinson's disease.

Parkinson's disease (PD) is a chronic, progressive, neurodegenerative disease with a multifactorial etiology. Protein accumulation is speculated by some to play a prominent role in the pathogenesis of PD. The severity of neurodegeneration should correlate with cerebrospinal fluid (CSF) levels of these neurodegenerative markers (NDMs).