Failure of embryonic hematopoiesis and lethal hemorrhages in mouse embryos heterozygous for a knocked-in leukemia gene CBFB-MYH11.
The fusion oncogene CBFB-MYH11 is generated by a chromosome 16 inversion in human acute myeloid leukemia subtype M4Eo. Mouse embryonic stem (ES) cells heterozygous for this oncogene were generated by inserting part of the human MYH11 cDNA into the mouse Cbfb gene through homologous recombination (knock-in). Chimeric mice were leukemia free, but the ES cells with the knocked-in Cbfb-MYH11 gene did not contribute to their hematopoietic tissues. Mouse embryos heterozygous for Cbfb-MYH11 lacked definitive hematopoiesis and developed multiple fatal hemorrhages around embryonic day 12.5. This phenotype is very similar to that resulting from homozygous deletions of either Cbfb or Cbfa2 (AML1), consistent with a dominant negative function of the Cbfb-MYH11 fusion oncogene. An impairment of primitive hematopoiesis was also observed, however, suggesting a possible additional function of Cbfb-MYH11.
Castilla
L H
LH
Laboratory of Gene Transfer, National Center for Human Genome Research, National Institutes of Health, Bethesda, Maryland 20892, USA.
Wijmenga
C
C
Wang
Q
Q
Stacy
T
T
Speck
N A
NA
Eckhaus
M
M
Marín-Padilla
M
M
Collins
F S
FS
Wynshaw-Boris
A
A
Liu
P P
PP
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D019070:Cell Lineage; D003342:Corpus Striatum / Q000098:blood supply / Q000473:pathology; D003433:Crosses, Genetic; D004622:Embryo, Mammalian / Q000473:pathology; D015672:Erythroid Precursor Cells; D005154:Facial Nerve / Q000473:pathology; D005804:Genes, Lethal; D006410:Hematopoiesis / Q000235:genetics*; D006412:Hematopoietic Stem Cells; D006470:Hemorrhage / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D015479:Leukemia, Myelomonocytic, Acute / Q000209:etiology* / Q000235:genetics*; D008099:Liver / Q000196:embryology / Q000503:physiopathology; D008526:Medulla Oblongata / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D008957:Models, Genetic; D008969:Molecular Sequence Data; D015514:Oncogene Proteins, Fusion / Q000235:genetics*; D009857:Oncogenes; D010496:Pericardium / Q000473:pathology
C095514:CBFbeta-MYH11 fusion protein; D015514:Oncogene Proteins, Fusion