HIF1A and neoplasm: The earlier findings that under hypoxic conditions expression of BNIP3 can be induced by the transcription factor HIF-1α (Bruick, 2000; Guo et al, 2001; Sowter et al, 2001) prompted us to evaluate the extent to which expression of BNIP3 in haematopoietic tumour cell lines could be induced by hypoxia.