Histocompatible miniature, boar model: selection of transformed cell lines of B and T lineages producing retrovirus.
A lymphoblastoid cell line (B1) was isolated in culture following a brief exposure to 5-azacytidine from peripheral-blood mononuclear cells of a boar previously injected with cells (Shimozuma) producing porcine retrovirus (Tsukuba-1) and suffering a severe non-neoplastic syndrome at autopsy. B1 cell line and 5 of its sublines were propagated for more than 100 generations, retaining doubling times comprised between 16.8 and 27.5 hr and growing readily in agarose or agar (plating efficiency: 5 to 50%). Karyotype analyses showed that 4 sublines were nearly diploid, except for cells of L14, which displayed a monosomy affecting chromosome 18 pair. Two sublines (L35 and L45) were considered as being of T-cell lineage, since MSA, antigen was observed on the surface of approximately 30% of cells. Three sublines (L23, L14 and L52) were considered of B-cell lineage, since membrane immunoglobulins were observed on the cell surface. In addition, sublines L23 and L52 were actively secreting immunoglobulin of mu isotype. Retrovirus particles were evidenced in gradient-purified preparation of 200-fold-concentrated cell culture supernatants of the B1 cell line, L14, L35 and L52 sublines, using both a reverse transcriptase activity assay and electron microscopic observation. These cell lines can be used to select for porcine retrovirus variants with transforming potential for lymphocytes of B and T lineages.
INRA, Laboratoire de Pathologie porcine et Immunologie, Nouzilly, France.
B
B
Kaeffer
E
E
Bottreau
L
L
Phan Thanh
M
M
Olivier
H
H
Salmon
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology / Q000382:microbiology* / Q000648:ultrastructure; D002455:Cell Division; D002460:Cell Line; D002472:Cell Transformation, Viral; D006650:Histocompatibility Testing; D007132:Immunoglobulin Isotypes / Q000276:immunology; D007621:Karyotyping; D008297:Male; D012190:Retroviridae / Q000502:physiology* / Q000648:ultrastructure; D013552:Swine; D013556:Swine, Miniature; D013601:T-Lymphocytes / Q000166:cytology / Q000382:microbiology* / Q000648:ultrastructure; D014771:Virion / Q000648:ultrastructure; D014779:Virus Replication
D007132:Immunoglobulin Isotypes