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Cerebrospinal fluid markers of pathogenetic processes in vascular dementia, with special reference to the subcortical
A Wallin1, K Blennow, L Rosengren
1Institute of Clinical Neuroscience, Göteborg University, Sahlgrenska University Hospital, Mölndal, Sweden.
Insights
Improving vascular dementia (VaD) diagnosis is crucial. Candidate biochemical markers in cerebrospinal fluid (CSF) show promise for detecting VaD-related brain changes when used with standard methods.
Area of Science:
- Neurology
- Biochemistry
Background:
- Current diagnosis of vascular dementia (VaD) relies on clinical assessment and brain imaging, which can be challenging, especially for subcortical VaD.
- Subcortical VaD diagnosis is complicated by its similarity to Alzheimer's disease and the frequent occurrence of mixed forms.
- There is a need for more accurate diagnostic tools, particularly biochemical markers reflecting underlying pathogenetic processes.
Purpose of the Study:
- To explore the potential of specific cerebrospinal fluid (CSF) biomarkers for improving the diagnosis of vascular dementia (VaD).
- To evaluate candidate markers reflecting blood-brain barrier damage, demyelination, neuronal degeneration, and axonal degeneration in the context of VaD.
Main Methods:
- Analysis of cerebrospinal fluid (CSF) for specific biochemical markers.
- Candidate markers investigated include CSF/serum albumin ratio, CSF sulfatide, CSF neuron-specific enolase, CSF tau protein, and CSF neurofilament light protein.
- Evaluation of these markers in conjunction with conventional diagnostic approaches.
Main Results:
- The CSF/serum albumin ratio may indicate blood-brain barrier damage in small cerebral vessels.
- CSF sulfatide could identify white matter demyelination.
- CSF neuron-specific enolase may detect neuronal degeneration, while CSF tau and neurofilament light proteins indicate axonal degeneration.
Conclusions:
- No single candidate marker is specific for subcortical VaD.
- Combined use of these CSF biomarkers with conventional diagnostic methods may enhance diagnostic accuracy for VaD.
- These biochemical markers offer potential adjunctive tools for diagnosing vascular dementia.
Abstract:
There is a need for improvement of the diagnosis of vascular dementia (VaD). Today, the clinician has to rely on clinical examination, history, and, possibly, brain imaging to identify cerebrovascular damage and other signs of VaD. The clinical diagnosis of subcortical VaD may be difficult because the clinical manifestation of this disorder is often similar to that of Alzheimer disease. There are also mixed forms of the two disorders. Biochemical diagnostic markers, which reflect the pathogenetic processes in the brain, would add to the accuracy of the diagnosis. There are some interesting candidate markers: the cerebrospinal fluid (CSF)/serum albumin ratio could be used to identify blood-brain barrier damage to the small intracerebral vessels, CSF sulfatide to identify ongoing demyelination of the white matter, CSF neuron-specific enolase to identify ongoing neuronal degeneration, and CSF tau protein and CSF neurofilament light protein to identify ongoing axonal degeneration. None of these potential markers is specific to subcortical VaD, but together and used in conjunction with the conventional diagnostic workup, they may be of diagnostic value.