Characteristics of lymphocytes appearing in persistent lymphocytosis induced experimentally in cattle by bovine leukemia virus infection.
Properties of peripheral blood lymphocytes (PBL) appearing during persistent lymphocytosis (PL) of cattle that was induced by inoculation of a large number of bovine leukemia virus (BLV)-infected lymphocytes were studied. The PBL possessed surface immunoglobulin at a high ratio and had high syncytium-forming activity. The PBL could not be distinguished from normal PBL cytogenetically. These PBL were shown to be polyclonal cells integrating BLV-proviral DNA randomly into their cellular DNA. These properties were similar to those of PBL appearing at the stage of PL of cattle naturally infected with BLV. The BLV-proviral DNA content of PBL and transcription of viral genes increased in parallel with development of PL and decreased along with a decline of PL indicating the possibility that gene expression and activation of BLV play an important role in induction and maintenance of PL.
Kono
Y
Y
Itohara
S
S
Muramatsu
S
S
Sentsui
H
H
Ishino
S
S
Sekikawa
K
K
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood / Q000382:microbiology*; D001909:Leukemia Virus, Bovine; D007942:Leukemia, Experimental / Q000097:blood / Q000382:microbiology / Q000662:veterinary*; D008214:Lymphocytes / Q000382:microbiology* / Q000473:pathology; D008218:Lymphocytosis / Q000097:blood / Q000382:microbiology / Q000662:veterinary*