A total of 34 leukemia and lymphoma samples (17 clinical samples and 1
7 cell lines) were analyzed for mutations of the Smad2 gene by reverse
transcriptase-polymerase chain reaction single strand conformation po
lymorphism (RT-PCR-SSCP) analysis. Nine of Phe 34 samples had 18q chro
mosomal abnormalities. No shifted bands were detected in any of the he
matological malignancies, Our results suggest that resistance Po cell
growth inhibitory effects of TGF-beta in hematological malignancies is
not due to alterations of the Smad2 gene.