Cerebrospinal fluid soluble L-selectin (sCD62L) in meningoencephalitis

Area of Science:

• Neuroimmunology
• Pediatric Infectious Diseases
• Biomarker Discovery

Background:

• L-selectin (CD62L) is a cell adhesion molecule rapidly cleaved upon activation, releasing soluble L-selectin (sCD62L).
• Elevated sCD62L in cerebrospinal fluid (CSF) may indicate central nervous system inflammation.

Purpose of the Study:

• To investigate sCD62L concentrations in pediatric CSF samples.
• To determine the association of sCD62L with meningoencephalitis and blood-brain barrier integrity.

Main Methods:

• Quantification of sCD62L in 185 pediatric CSF samples using enzyme-linked immunosorbent assay.
• Analysis of CSF protein levels and correlation with sCD62L concentrations.
• Comparison of sCD62L levels across groups: meningoencephalitis, other febrile diseases, and non-febrile disorders.

Main Results:

• Significantly higher CSF sCD62L levels were observed in children with meningoencephalitis (median 209 fmol/ml) compared to other febrile (median 50 fmol/ml) and non-febrile (median 44 fmol/ml) groups.
• A positive correlation (rS = 0.68) between CSF protein and sCD62L suggests blood-brain barrier disruption.
• The CSF sCD62L/protein ratio was significantly higher in meningoencephalitis patients, indicating sCD62L generation beyond plasma leakage.

Conclusions:

• Elevated CSF sCD62L concentrations in pediatric meningoencephalitis are attributed to both impaired blood-brain barrier function and local sCD62L production by infiltrating leukocytes.
• sCD62L shows potential as a biomarker for meningoencephalitis in children.