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Is the blood-CSF barrier altered in disease?
1Department of Neurology, University Hospital Benjamin Franklin, Free University of Berlin, Berlin, Germany. seyfert@medizin.fu-berlin.de
Acta Neurologica Scandinavica
|September 6, 2003
Summary
Cerebrospinal fluid (CSF) flow significantly impacts lumbar CSF protein levels, specifically albumin and immunoglobulin G concentrations. Altered blood-CSF barrier permeability plays a minor role in these variations in patients with normotensive hydrocephalus.
Area of Science:
- Neurology
- Neurosurgery
- Clinical Chemistry
Background:
- Cerebrospinal fluid (CSF) protein concentration is influenced by various factors.
- Understanding the determinants of CSF protein levels is crucial for diagnosing neurological conditions.
Purpose of the Study:
- To investigate the impact of CSF flow dynamics on lumbar CSF protein concentrations.
- To evaluate the contribution of blood-CSF barrier permeability to variations in CSF protein levels.
Main Methods:
- Studied 21 hospitalized patients with normotensive hydrocephalus.
- Collected sequential CSF samples via lumbar puncture.
- Compared CSF/blood quotients of albumin (QAlb) and immunoglobulin G (QIgG) intra-individually and against a reference sample.
Main Results:
- High correlation (median r = 0.95) between QAlb and QIgG in sequential CSF portions.
- Lumbar CSF flow identified as the primary determinant of QAlb and QIgG variation.
- Significantly lower QIgG relative to QAlb in study patients compared to reference (P = 0.002).
Conclusions:
- Lumbar CSF flow is the main factor influencing lumbar CSF protein concentrations.
- An altered blood-CSF barrier permeability contributes to a lesser extent to variations in CSF protein levels.