Expression of SSTRs and opioid receptors in malignant haematological cell lines. A-F, RNAs were extracted from various hemopathy cell lines, reverse transcribed, and cDNAs encoding for SSTR1 to 5 were amplified by PCR. PCR products were separated on agarose gel and stained with ethidium bromide. St: 100 pb ladder, 1: Jurkat, 2: Nalm6, 3: RPMI-8226, 4: Ramos, 5: MCF-7, 6: NCI-H929, 7: LP-1, 8: SH-SY5Y, 9: 697, 10: U266, C: negative control. * corresponds to the band of the expected size. G, opioid receptors (KOP-, DOP- and MOP-R) were amplified by PCR. St: 100 pb ladder, 1: U266, 2: SH-SY5Y, C: negative control. H, expression of opioid receptors (KOP-, DOP- and MOP-R) was studied by western-blot in U266 cells (lane 1) and in positive controls (lane 2): human placenta (KOP-R), SH-SY5Y (MOP-R) and SK-N-BE cells (DOP-R). Data are representative of three independent experiments.