SSPE, measles virus, and the matrix protein: report of a case with unusual immunochemical findings
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Abstract:
We report a case of atypical subacute sclerosing panencephalitis (SSPE) in which the diagnosis was confirmed by a new radioimmunoprecipitation method. Antimeasles antibody was absent in the cerebrospinal fluid (CSF) when measured by conventional immunoassay techniques, there was no clinical response to isoprinosine, and the patient showed a selective absence of CSF antibody response to the matrix protein and only a partial serum antibody response to this measles polypeptide. The value of this sensitive immunoprecipitation method in profiling the selective antibody responses to the several measles polypeptides and the advisability of using isoprinosine, an immunopotentiating agent, to treat SSPE are discussed.
Insights
A new radioimmunoprecipitation method confirmed atypical subacute sclerosing panencephalitis (SSPE). This sensitive technique profiles selective antibody responses, aiding in diagnosing rare measles virus infections.
Area of Science:
- Neurology
- Immunology
- Virology
Background:
- Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological complication of measles virus infection.
- Conventional diagnostic methods may fail to detect SSPE in atypical cases.
Observation:
- A patient presented with atypical SSPE, lacking expected antimeasles antibodies in cerebrospinal fluid (CSF) via standard immunoassays.
- The patient showed no clinical improvement with isoprinosine treatment.
Findings:
- A novel radioimmunoprecipitation method confirmed the SSPE diagnosis.
- The patient exhibited a selective absence of CSF antibody response to measles matrix protein and a partial serum response.
Implications:
- This sensitive immunoprecipitation assay is valuable for profiling specific antibody responses to measles virus polypeptides in SSPE.
- The findings question the general advisability of using isoprinosine for SSPE treatment, particularly in cases with selective antibody deficiencies.
