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Published on: November 5, 2019
Endogenous production of infectious Inoue-Melnick virus in a human meningioma cell line
Y Nishibe1, Y K Inoue, A C Hollinshead
1Institute for Virus Research, Kyoto University, Japan.
Abstract:
We investigated continuous production of Inoue-Melnick virus (IMV) in the MG-1 cell line, established from human meningioma. The infectious virus, identified as a type 1 virus, was mostly recovered extracellularly. Assay of MG-1 cells as infective centers indicated that most of the cells were capable of producing infectious virus. By immunofluorescence, more than 90% of the cells were found to have IMV-associated cytoplasmic antigen(s) (IMCA).
Insights
Inoue-Melnick virus (IMV) production was studied in human meningioma-derived MG-1 cells. Results show continuous IMV replication and extracellular release, with over 90% of cells expressing viral antigens.
Area of Science:
- Virology
- Cell Biology
- Oncology
Background:
- The MG-1 cell line originates from human meningioma tissue.
- Inoue-Melnick virus (IMV) is a type 1 virus with implications for cell culture studies.
Purpose of the Study:
- To investigate the continuous production of Inoue-Melnick virus (IMV) in the MG-1 cell line.
- To characterize the replication and release of IMV within this specific cell line.
Main Methods:
- Cell culture of MG-1 cells derived from human meningioma.
- Infectious virus recovery assays.
- Infective center assays.
- Immunofluorescence staining for IMV-associated cytoplasmic antigens (IMCA).
Main Results:
- Continuous production of IMV was achieved in the MG-1 cell line.
- Infectious IMV was predominantly recovered extracellularly.
- Over 90% of MG-1 cells exhibited IMV-associated cytoplasmic antigens (IMCA) via immunofluorescence.
- Infective center assays confirmed widespread viral production capability among MG-1 cells.
Conclusions:
- The MG-1 cell line supports robust and continuous replication of Inoue-Melnick virus.
- MG-1 cells are highly susceptible to IMV infection, with most cells actively producing and releasing the virus.
- This cell line serves as a valuable model for studying IMV biology and pathogenesis.

