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Persistent infection with a nontransforming RNA virus leads to impaired growth factor receptors and response
Author(s) -
Verdin Eric M.,
MaratosFlier Eleftheria,
Carpentier JeanLouis,
Kahn C. Ronald
Publication year - 1986
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.1041280315
Subject(s) - biology , lytic cycle , receptor , epidermal growth factor , cell culture , virus , growth factor , 3t3 cells , fibroblast , dna synthesis , virology , microbiology and biotechnology , dna , biochemistry , genetics , transfection
The potential role of viral persistence with nontransforming viruses on cellular growth and cellular function has received little attention. We found that when infected with type 3 reovirus (five plaque‐forming units (PFU)/cell), balb/C 3T3 cells (a mouse embryo fibroblast cell line) undergo a limited lytic phase. The surviving cells, about 90% of the original cells, appear morphologically normal by light microscopy and exhibit normal growth patterns in serum‐supplemented medium but are persistently infected by electron microscopy. These persistently infected cells shed infectious virus in the culture medium (1.6–60 × 10 6 PFU per 10 6 cells per 24 h). In comparison to control uninfected 3T3 cells, the persistently infected cells exhibit a 70–90% decrease in receptor number for epidermal growth factor (EGF). This occurs without production of any EGF‐like material and is associated with a parallel decrease in EGF‐stimulated DNA synthesis. By contrast, insulin receptors are increased in number three‐fold and insulin and serum stimulated DNA synthesis are comparable to control uninfected cells. These results suggest that persistent infection with a nontransforming virus may lead to major alteration in control of cell growth by specific growth factors.