title: [cAMP analogue 8-CPT-cAMP inducing differentiation in the M2b subtype of acute myeloid leukemia cell line Kasumi-1].
abstract: This study was aimed to investigate the possible effects of cyclic adenosine monophosphate (cAMP) analogue 8-(4-chlorophenylthio) adenosine 3', 5'-cyclic monophosphate (8-CPT-cAMP) on the M(2b) subtype of acute myeloid leukemia (AML-M(2b)) cells. AML-M(2b) is characterized by the non-random chromosome translocation t (8; 21) (q22; q22), through which AML1 (acute myeloid leukemia 1) gene on chromosome 21 is fused with ETO (eight twenty-one) gene on chromosome 8, coding correspondent AML1-ETO fusion protein, which plays a crucial role in the leukemogenesis of AML-M(2b). The AML-M(2b) cell line Kasumi-1 cells were used as an in vitro model. The influences of 8-CPT-cAMP on the proliferation and differentiation of Kasumi-1 cells were evaluated according to cellular morphology, changes in cell surface antigen and cell cycle, as well as nitroblue-tetrazolium (NBT) assay. Meanwhile, semi-quantity RT-PCR and Western blot assay were used to detect the degradation of AML1-ETO fusion protein in Kasumi-1 cells before and after the treatment. The results showed that 8-CPT-cAMP (200 micromol/L) could significantly inhibit cell growth and induce differentiation of Kasumi-1 cells. However, it must be pointed out that 8-CPT-cAMP-induced differentiation in Kasumi-1 is not a typical terminal differentiation. Furthermore, 8-CPT-cAMP exerted little influence on the expression of AML1-ETO fusion gene and its product in Kasumi-1 cells. In conclusion, the 8-CPT-cAMP induced differentiation in Kasumi-1 cells. This results may provide experimental and theoretical basis for the breakthrough of differentiation-induced therapy extended to another leukemia.
authors.affiliation: Department of Hematology, Shanghai Ninth People Hospital, Shanghai Jiaotong University Medical College, Shanghai 200011, China. zhuqi70@hotmail.com
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhu
authors.forename: Jun-Pei
authors.initials: JP
authors.lastname: Hu
authors.forename: Pei-Min
authors.initials: PM
authors.lastname: Jia
authors.forename: Zhen-Yi
authors.initials: ZY
authors.lastname: Wang
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Tong
mesh_terms: D002471:Cell Transformation, Neoplastic / Q000187:drug effects*; D050676:Core Binding Factor Alpha 2 Subunit / Q000235:genetics / Q000378:metabolism; D000242:Cyclic AMP / Q000031:analogs & derivatives* / Q000494:pharmacology; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D015514:Oncogene Proteins, Fusion / Q000235:genetics / Q000378:metabolism; D000075142:RUNX1 Translocation Partner 1 Protein; D013873:Thionucleotides / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: C107844:AML1-ETO fusion protein, human; D050676:Core Binding Factor Alpha 2 Subunit; D015514:Oncogene Proteins, Fusion; D000075142:RUNX1 Translocation Partner 1 Protein; D013873:Thionucleotides; C015929:8-((4-chlorophenyl)thio)cyclic-3',5'-AMP; D000242:Cyclic AMP