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Ultrastructural and immunohistochemical evidence of measles virus in active otosclerosis
1Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts.
Abstract:
Because of the similarity between otosclerosis and Paget's disease of bone, and the mounting evidence of a viral cause in Paget's disease, we have investigated a possible viral cause for otosclerosis. Transmission electron microscopy of stapes footplate fragments with active otosclerosis has revealed structures morphologically identical with measles virus nucleocapsid in osteoblasts and preosteoblasts. Immunofluorescence and immunoperoxidase studies have confirmed the presence of measles nucleocapsid antigen in active lesions. Application of sera from patients with subacute sclerosing panencephalitis, a defective measles virus infection of the central nervous system, resulted in positive immunoreaction in areas of active otosclerosis.
Insights
Researchers investigated a potential viral cause for otosclerosis, finding evidence of measles virus nucleocapsid in bone samples. This suggests measles virus may play a role in the development of otosclerosis.
Area of Science:
- Otolaryngology
- Virology
- Bone Biology
Background:
- Otosclerosis shares similarities with Paget's disease of bone.
- Paget's disease of bone has mounting evidence suggesting a viral etiology.
- The potential viral cause of otosclerosis remains largely unexplored.
Purpose of the Study:
- To investigate a possible viral etiology for otosclerosis.
- To identify specific viral agents associated with active otosclerosis lesions.
- To explore the link between measles virus and otosclerosis.
Main Methods:
- Transmission electron microscopy of stapes footplate fragments from otosclerosis patients.
- Immunofluorescence and immunoperoxidase staining to detect viral antigens.
- Serological testing using sera from subacute sclerosing panencephalitis patients.
Main Results:
- Structures morphologically identical to measles virus nucleocapsid were observed in osteoblasts and preosteoblasts within active otosclerosis lesions.
- Measles nucleocapsid antigen was confirmed in active otosclerosis lesions via immunofluorescence and immunoperoxidase studies.
- Positive immunoreaction was observed in active otosclerosis areas when tested with sera from subacute sclerosing panencephalitis patients.
Conclusions:
- The findings provide evidence for the presence of measles virus nucleocapsid in active otosclerosis.
- Measles virus is a potential etiological agent in the development of otosclerosis.
- Further research is warranted to elucidate the role of measles virus in otosclerosis pathogenesis.