Related Experiment Videos
[Isolation of murine sarcoma virus not associated with XC plague forming leukemia virus]
Comptes Rendus Hebdomadaires Des Seances De L'Academie Des Sciences. Serie D: Sciences Naturelles
|November 17, 1975
Abstract:
The N-type MLg cells transformed by B-tropic MuSV (WN1802B) produced defective MuSV without detectable among of MuLV; the focus formation by the culture fluid required the co-infection of exogenous MuLV. After one passage of the virus in MLg cells, we obtained a virus preparation which was capable of inducing foci without the exogenous MuLV, but which remained negative in the XC test.
Insights
Murine sarcoma virus (MuSV) transformation of MLg cells yielded defective MuSV requiring helper virus. Subsequent passage produced focus-forming MuSV, indicating viral adaptation without exogenous helper.
Area of Science:
- Virology
- Molecular Biology
- Cell Biology
Context:
- Murine sarcoma virus (MuSV) is a retrovirus known to induce tumors.
- N-type MLg cells are a specific cell line used in retroviral research.
- Defective viral particles often require helper viruses for replication and propagation.
Purpose:
- To investigate the properties of MuSV produced in N-type MLg cells.
- To determine the helper virus requirements for focus formation by MuSV.
- To characterize the viral progeny after passage in MLg cells.
Summary:
- MLg cells transformed with B-tropic MuSV initially produced defective MuSV, necessitating co-infection with exogenous Moloney murine leukemia virus (MuLV) for focus formation.
- A single passage of the virus in MLg cells resulted in a viral preparation capable of inducing foci independently of exogenous MuLV.
- Despite acquiring focus-forming ability, the adapted virus remained negative in the XC plaque assay, suggesting altered biological properties.
Impact:
- Demonstrates the ability of MuSV to adapt and acquire replication competence in specific cell types.
- Highlights the limitations of the XC test in detecting certain biologically active retroviruses.
- Provides insights into retroviral evolution and the generation of infectious viral particles.