Expression levels of AML-1A and AML-1B mRNA in various cells.

mRNA expression levels of AML-1A, AML-1B, and MIP-1α were determined in various cell lines including MM-derived cell types by RT-PCR analysis. Expression levels of AML-1A mRNA were up-regulated in the MIP-1α, producing MM cells (MM.1S, ARH-77, and MC/Q2). Relative expression levels of AML-1B mRNA were up-regulated in the MM cells expressing low levels of MIP-1α and non-MM hematopoietic cells.