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Mol. Cell. Biol., Mar 1995, 1662-1670, Vol 15, No. 3
M Satake, S Nomura, Y Yamaguchi-Iwai, Y Takahama, Y Hashimoto, M Niki, Y Kitamura and Y Ito
The PEBP2 alpha A and PEBP2 alpha B genes encode the DNA-binding subunit of
a murine transcription factor, PEBP2, which is implicated as a
T-cell-specific transcriptional regulator. These two related genes share
the evolutionarily conserved region encoding the Runt domain. PEBP2 alpha B
is the murine counterpart of human AML1, which is located at the
breakpoints of the 8;21 and 3;21 chromosome translocations associated with
acute myeloid leukemia. Northern (RNA) blots of various adult mouse tissues
revealed that the levels of expression of both genes were most prominent in
the thymus. Furthermore, transcripts of PEBP2 alpha A and mouse AML1/PEBP2
alpha B were detected in T lymphocytes in the thymuses from day 16 embryos
and newborns, as well as 4-week-old adult mice, by in situ hybridization.
The expression of the genes persisted in peripheral lymph nodes of adult
mice. The transcripts were detected in all the CD4- CD8-, CD4+ CD8+, CD4+
CD8-, and CD4- CD8+ cell populations. The results indicated that both genes
are expressed in T cells throughout their development, supporting the
notion that PEBP2 is a T-cell-specific transcription factor. Transcripts of
mouse AML1/PEBP2 alpha B were also detected in day 12 fetal hematopoietic
liver and in the bone marrow cells of newborn mice. The implication of
mouse AML1/PEBP2 alpha B expression in hematopoietic cells other than those
of T-cell lineage is discussed in relation to myeloid leukemogenesis.
Copyright © 1995, American Society for Microbiology
Expression of the Runt domain-encoding PEBP2 alpha genes in T cells during thymic development
Department of Viral Oncology, Kyoto University, Japan.
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