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Expression of programmed cell death 5 gene involves in regulation of apoptosis in gastric tumor cells

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Abstract

The protein of programmed cell death 5 (PDCD5) is believed to participate in regulation of apoptosis. Although PDCD5 is reducibly expressed in various human tumors, it is not clear which expression level of PDCD5 is in gastric cancer (GC). In this study, we have systematically employed the approaches of RT-PCR, Real- time PCR, Immunohistochemistry (IHC), Immunofluorescence staining (IFS) and Western blot to determine the PDCD5 expression in GC cells and primary tumors, at mRNA and protein level, respectively. Our data revealed that the positive rate of PDCD5 expression in the gastric tumor tissues was significantly less than that of the normal tissues (14 out of 102 vs 36 out of 51), whereas, the decreased expression of PDCD5 protein was well correlated with the up-regulated expression of Bcl-2 in these tissues, and the up-regulated expression and nuclear translocation of PDCD5 protein were verified in the apoptotic GC cells induced by Diallyl trisulfide (DATS). Furthermore, the survival curve has suggested that the more PDCD5 expressions were found in the patients, the longer the survival periods were. Therefore, our observations lay down a reasonable postulation that PDCD5 may play a key role to regulate the apoptotic processes in the GC cells and gastric tumors.

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Authors and Affiliations

  1. Molecular Oncology Laboratory, Beijing Institute for Cancer Research, School of Oncology, Peking University, Fu-Cheng Road 52#, Hai-Dian District, Beijing, 100036, P.R. China

    Y.-H. Yang, M. Zhao, W.-M. Li, Y.-Y. Lu & Y.-Y. Lu M.D.

  2. Laboratory of Medical Immunology, School of Basic Medical Science, Peking University, 38 Xueyuan Road, Beijing, 100083, P.R. China

    Y.-Y. Chen

  3. Beijing Genomics Institute, Chinese Academy of Sciences, Beijing Airport Industrial Zone B-6, Shunyi, Beijing, 101300, P.R. China

    B. Kang & Y.-Y. Lu M.D.

  4. Beijing Molecular Oncology Laboratory, Beijing Institute for Cancer Research, School of Oncology, Peking University, Fu-Cheng Road 52#, Hai-Dian District, Beijing, 100036, P.R. China

    Y.-Y. Lu M.D.

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  1. Y.-H. Yang
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  2. M. Zhao
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  3. W.-M. Li
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  4. Y.-Y. Lu
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  5. Y.-Y. Chen
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  7. Y.-Y. Lu M.D.
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Correspondence to Y.-Y. Lu M.D..

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Yang, YH., Zhao, M., Li, WM. et al. Expression of programmed cell death 5 gene involves in regulation of apoptosis in gastric tumor cells. Apoptosis 11, 993–1001 (2006). https://doi.org/10.1007/s10495-006-6714-6

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  • DOI: https://doi.org/10.1007/s10495-006-6714-6

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