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2016, Number 1

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Rev Cubana Neurol Neurocir 2016; 6 (1)

Immunoglobulin G and albumin quantification in the cerebrospinal fluid by modifications in techniques for other biological fluids

Betancourt LM, Cordero EA, Peña SM, González GS, Lorigados PL, González-Quevedo A

Language: Spanish
References: 20
Page: 9-16
PDF size: 598.47 Kb.


ABSTRACT

Objective: To evaluate the results of estimating the functional status of blood–cerebrospinal fluid barrier (B–CSFB) and intrathecal immunoglobulin synthesis (ITS) of IgG for central nervous system by modified commercial techniques designed for other biological fluids.
Methods: Disc polyacrylamide gel electrophoresis and quantification of CSF total protein in CSF and serum of 61 patients were conducted at the Institute of Neurology and Neurosurgery (INN) between April and September 2014. The concentration of albumin and IgG was determined by commercial standardized techniques and by modifications of commercial techniques. Albumin ratio and IgG index were calculated and employed to evaluate B–CSFB permeability and ITS, respectively.
Results: Total protein and protein electrophoresis patterns were correlated with the quantifications performed by modified commercial techniques. There was no significant difference between validated commercial techniques and modified techniques for quantifications of CSF albumin (Z=0,41; p=0,6791), serum albumin (Z=0,08; p=0,9382), Qalb (Z=0,21; p=0,8361), CSF IgG (Z=1,65; p=0,0995) and IgG index (Z=1,10; p=0,2721).
Conclusions: The immunological studies in CSF obtained from modifying commercial techniques designed for other biological fluids are useful to estimate the functionality of B–CSFB and intrathecal immunoglobulin synthesis. The modifications carried out for the turbidimetric technique and for the UMELISA kit should be standardized for the validation of BCSF–B permeability and IgG ITS by the nervous system.


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