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Development of antibody to measles virus polypeptides during complicated and uncomplicated measles virus infections
Abstract:
Immune precipitation of 181 sera from 152 patients with natural measles was studied to determine the temporal course and frequency of antibody responses to nucleocapsid, fusion, hemagglutinin, and matrix proteins of measles virus. Large amounts of antibody to nucleocapsid protein developed in all patients by day one of the rash. Antibody to hemagglutinin and fusion proteins developed in all patients over the next 3 weeks, the former to high levels and the latter to low levels. Antibody to matrix protein developed to very low levels and was detectable in only 41% of the patients; this poor response to matrix protein was not correlated with the age of the patient or the acute neurological complications of measles.
Insights
Measles patients develop antibodies to viral proteins rapidly after rash onset. Antibody responses vary by protein, with matrix protein showing the poorest and least frequent antibody development in natural measles infection.
Area of Science:
- Virology
- Immunology
- Infectious Diseases
Background:
- Measles is a highly contagious viral illness caused by the measles virus.
- Understanding the immune response to different measles virus proteins is crucial for vaccine development and disease management.
Purpose of the Study:
- To investigate the temporal dynamics and prevalence of antibody responses against specific measles virus proteins (nucleocapsid, fusion, hemagglutinin, matrix).
- To correlate antibody responses with patient age and neurological complications.
Main Methods:
- Immune precipitation assay was used to analyze 181 serum samples from 152 patients with natural measles.
- Antibody levels against nucleocapsid, fusion, hemagglutinin, and matrix proteins were quantified over time post-rash onset.
Main Results:
- All patients developed high levels of antibody to nucleocapsid protein by day one of rash.
- Antibodies to hemagglutinin and fusion proteins developed within 3 weeks, with high and low levels respectively.
- Antibody response to matrix protein was poor, detected in only 41% of patients, and not linked to age or neurological issues.
Conclusions:
- The immune system mounts a robust and rapid antibody response to nucleocapsid, hemagglutinin, and fusion proteins during natural measles infection.
- The limited and delayed antibody response to the matrix protein suggests it may be a less immunogenic target or requires different immune mechanisms.