Y H Qiu

Publications (3)4.06 Total impact

• Article: Polymorphisms in PDCD1 gene are not associated with aplastic anemia in Chinese Han population.

  Z J Ming, H Hui, M Miao, Y H Qiu, X G Zhang
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  ABSTRACT: Programmed cell death 1 (PD-1) has recently been reported to have a genetic association in several autoimmune diseases. The object of this study was to investigate the association of PD-1 polymorphisms with aplastic anemia (AA) in the Chinese Han population. In a case-control association study, three single-nucleotide polymorphisms (SNP), PD-1.3 G/A, PD-1.5 C/T, and PD-1.9 T/C, were genotyped in 166 AA patients and 264 healthy controls using polymerase chain reaction-restriction fragment length polymorphism assay. All genotype distributions in the patients and the controls were in Hardy-Weinberg equilibrium. The associations of genotypes and alleles with AA were analyzed. No differences in genotype and allele frequencies were elucidated for SNPs in intron 4 and exon 5. In conclusion, we show no association of selected SNPs in PDCD1 gene with AA in the Chinese Han population.
  Rheumatology International 09/2011; 32(10):3107-12. · 1.88 Impact Factor
• Article: Synergistic effects of beta-aescin and 5-fluorouracil in human hepatocellular carcinoma SMMC-7721 cells.

  Z J Ming, Y Hu, Y H Qiu, L Cao, X G Zhang
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  ABSTRACT: The effects and mechanisms of action of beta-aescin and 5-fluorouracil (5-FU), alone and in combination, were studied in human hepatocellular carcinoma SMMC-7721 cells. Growth inhibition, cell cycle distribution, apoptosis, Bcl-2 expression and caspase activity were assessed. The Isobole-method/interaction-index analysis was applied to evaluate the synergy, additivity or antagonism of these agents. The results indicate that mixtures of beta-aescin and 5-FU showed a synergistic effect on the 50% inhibitory effect when their ratio was 4:1 when compared with either agent alone. The mechanism of action could be through the synergistic arrest of the cell cycle, induction of apoptosis, activation of caspases-3, 8 and 9, and down-regulation Bcl-2 expression. The results suggest that mixtures of these two agents had a synergistic inhibitory effect on SMMC-7721 cells, an observation which might be useful for the further development of anti-cancer drugs.
  Phytomedicine: international journal of phytotherapy and phytopharmacology 07/2010; 17(8-9):575-80. · 2.17 Impact Factor
• Article: An agonist anti-human CD40 monoclonal antibody that induces dendritic cell formation and maturation and inhibits proliferation of a myeloma cell line.

  Z H Zhou, J F Wang, Y D Wang, Y H Qiu, J Z Pan, W Xie, L Y Jiang, B Klein, X G Zhang
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  ABSTRACT: CD40, a 48-50 KD cell membrane molecule, member of the nerve growth factor receptor and tumor necrosis factor receptor superfamily, is an important costimulatory molecule during the immune response. Anti-CD40 monoclonal antibody (MAb) has been shown earlier to costimulate with IgM or phorbol esters resting B cells to proliferate, differentiate, secrete immunoglobulins, and switch isotype. Here we report on an agonistic mouse anti-human CD40 MAb 5C11. The specificity of this MAb was verified by flow cytometry, Western blotting, and competition with anti-CD40 MAb 89. We studied the effects of MAb 5C11 on a multimyeloma cell line, XG2, that expresses the CD40 antigen strongly and found that this MAb caused the homotypic aggregation of XG2, strongly suppressed XG2 proliferation, and led to its apoptosis after 24 hr of treatment. Interestingly, MAb 5C11 also triggered the generation, proliferation, and maturation of dendritic cells from peripheral blood monocytes, either by itself or in combination with GM-CSF and IL-4.
  Hybridoma 01/2000; 18(6):471-8.