TY - JOUR
T1 - Haemopoietic colony formation (BFU-E, GM-CFC) during the development of pure red cell hypoplasia induced in the cat by feline leukaemia virus
AU - Testa, N. G.
AU - Onions, D.
AU - Jarrett, O.
AU - Frassoni, F.
AU - Eliason, J. F.
PY - 1983
Y1 - 1983
N2 - The GM-CFC assay for granulocyte-macrophage progenitors and the BFU-E and CFU-E assay for early and late erythroid progenitors from cat bone marrow were characterized. GM-CFC gave 59 ± 4 to118 ± 6 colonies per 105 bone marrow cells using colony stimulating factors (CSF) from cat, mouse or human sources. The CFU-E and BFU-E assays gave 114 ±7 and 58 ±7 colonies respectively with optimum doses of erythropoietin. Irradiated cat bone marrow cells were good sources of CSF and of burst promoting activity for these assays. Kittens infected with feline leukaemia virus, subgroup C (FeLV-C), which induces pure red cell hypoplasia, showed the incidence of BFU-E decreased to 25-35% of controls as early as one week post-infection, and even lower values at later times. In contrast, the incidence of GM-CFC remained normal for several weeks. No evidence of inhibitory cells or of lack of stimulatory cells in the infected marrows was seen when they were cultured together with normal marrow in the BFU-E assay. Conversely, normal marrow cells were not able to restore BFU-E growth from infected marrow. This suggests a direct action of FeLV-C on early erythroid precursors. Infection with FeLV, subgroup A, which induces only a mild transitory anaemia, produces only a moderate decrease in the incidence of BFU-E.
AB - The GM-CFC assay for granulocyte-macrophage progenitors and the BFU-E and CFU-E assay for early and late erythroid progenitors from cat bone marrow were characterized. GM-CFC gave 59 ± 4 to118 ± 6 colonies per 105 bone marrow cells using colony stimulating factors (CSF) from cat, mouse or human sources. The CFU-E and BFU-E assays gave 114 ±7 and 58 ±7 colonies respectively with optimum doses of erythropoietin. Irradiated cat bone marrow cells were good sources of CSF and of burst promoting activity for these assays. Kittens infected with feline leukaemia virus, subgroup C (FeLV-C), which induces pure red cell hypoplasia, showed the incidence of BFU-E decreased to 25-35% of controls as early as one week post-infection, and even lower values at later times. In contrast, the incidence of GM-CFC remained normal for several weeks. No evidence of inhibitory cells or of lack of stimulatory cells in the infected marrows was seen when they were cultured together with normal marrow in the BFU-E assay. Conversely, normal marrow cells were not able to restore BFU-E growth from infected marrow. This suggests a direct action of FeLV-C on early erythroid precursors. Infection with FeLV, subgroup A, which induces only a mild transitory anaemia, produces only a moderate decrease in the incidence of BFU-E.
KW - BFU-E
KW - Feline Leukemia Virus
KW - GM-CFC
KW - Pure red cell hypoplasia
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U2 - 10.1016/0145-2126(83)90001-2
DO - 10.1016/0145-2126(83)90001-2
M3 - Article
C2 - 6304428
AN - SCOPUS:0020595455
VL - 7
JO - Leukemia Research
JF - Leukemia Research
SN - 0145-2126
IS - 2
ER -