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Measles-specific IgG in CSF and serum from patients with subacute sclerosing panencephalitis
Abstract:
Sera and cerebrospinal fluid (CSF) from five subacute sclerosing panencephalitis (SSPE) patients were absorbed with a concentrated preparation of cell cultures infected with measles virus. The precipitates containing measles antigen-antibody complex were washed and measles-specific IgG was eluted at low pH. When the profiles of measles-specific IgG eluted from sera and the corresponding CSF were compared in immunofixation after isoelectric focusing they showed almost identical oligoclonal band patterns with respect to number, intensity, isoelectric point and light chain class. The results suggest that the same cell clones are responsible for the synthesis of measles-specific IgG in the central nervous system and serum of patients with SSPE.
Insights
Subacute sclerosing panencephalitis (SSPE) patients show identical measles-specific IgG antibody patterns in serum and cerebrospinal fluid (CSF). This suggests the same immune cell clones produce these antibodies in both the central nervous system and blood.
Area of Science:
- Neurology
- Immunology
- Virology
Background:
- Subacute sclerosing panencephalitis (SSPE) is a rare, chronic, progressive complication of measles virus infection.
- Understanding the immune response in SSPE is crucial for developing targeted therapies.
- Oligoclonal immunoglobulin G (IgG) bands in cerebrospinal fluid (CSF) are characteristic of SSPE, indicating localized immune activity.
Purpose of the Study:
- To compare the measles-specific IgG antibody profiles in the serum and CSF of SSPE patients.
- To investigate whether the same B cell clones are responsible for IgG synthesis in the central nervous system and periphery.
Main Methods:
- Sera and CSF from five SSPE patients were analyzed.
- Measles virus-infected cell cultures were used to absorb antigen-antibody complexes.
- Measles-specific IgG was eluted using a low pH method.
- Isoelectric focusing followed by immunofixation was employed to analyze IgG profiles.
Main Results:
- Identical oligoclonal band patterns (number, intensity, isoelectric point, light chain class) were observed for measles-specific IgG eluted from both serum and CSF.
- The similarity in band patterns strongly suggests a common origin of the antibody-producing B cells.
Conclusions:
- The findings indicate that the same B cell clones are responsible for producing measles-specific IgG in both the central nervous system and serum of SSPE patients.
- This suggests a systemic immune response with a common clonal origin for antibodies found in different compartments.