title: [Apoptosis of retinoic acid resistant NB4-R1 cells induced with curcumin and its mechanism].
abstract: This study was purposed to explore the inhibitory effect of Curcumin on growth of retinoic acid-resistant acute promyelocytic leukemia (APL) cells and its mechanism. The NB4-R1, an APL cell line resistant to retinoic acid, was used as a model. The growth level of NB4-R1 was detected by MTT assay, the morphologic features of cells were observed by light microscopy, the mitochondrial transmembrane potential was determined by flow cytometry, the expressions of apoptosis-related proteins procaspase 3, caspase 3, PARP and BCL-XL were measured by Western blot. The results indicated that the sensitivity of NB4-R1 to Curcumin was consistent with NB4 though NB4-R1 was resistant to retinoic acid, Curcumin displayed inhibitory effect on growth of NB4-R1 in time-and concentration-dependent manners. The morphologic observation showed existence of apoptotic bodies in NB4-R1 cells treated with 20 micromol/L of Curcumin. The flow cytometry indicated that the mitochondrial transmembrane potential in NB4-R1 cells treated with 20 micromol/L of Curcumin obviously decreased. The Western blot detection revealed that expressions of pro-caspase 3 and BCL-XL were down-regulated, expressions of caspase 3 and sheared PAPP were up-regulated in NB4-R1 cells treated with 20 micromol/L of Curcumin. It is concluded that the Curcumin can inhibit the growth and induce the apoptosis of NB4-R1.
authors.affiliation: Department of Laboratorial Examination, The First Affiliated Hospitul, Nanchang University, Nanchang 330006, Jiangxi Province, China.
authors.forename: Zhang-Lin
authors.initials: ZL
authors.lastname: Zhang
authors.forename: Yun-Yuan
authors.initials: YY
authors.lastname: Kong
authors.forename: La-Gen
authors.initials: LG
authors.lastname: Wan
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3 / Q000378:metabolism; D045744:Cell Line, Tumor; D003474:Curcumin / Q000494:pharmacology*; D006801:Humans; D015473:Leukemia, Promyelocytic, Acute / Q000378:metabolism; D000071137:Poly (ADP-Ribose) Polymerase-1; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism; D014212:Tretinoin / Q000494:pharmacology*; D051020:bcl-X Protein / Q000378:metabolism
chemical_list: C494811:BCL2L1 protein, human; D051020:bcl-X Protein; D014212:Tretinoin; C499320:PARP1 protein, human; D000071137:Poly (ADP-Ribose) Polymerase-1; D011065:Poly(ADP-ribose) Polymerases; C505407:CASP3 protein, human; D053148:Caspase 3; D003474:Curcumin