Expression of programmed cell death 5 gene involves in regulation of apoptosis in gastric tumor cells |
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Authors: | Y-H Yang M Zhao W-M Li Y-Y Lu Y-Y Chen B Kang Y-Y Lu MD |
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Institution: | (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;(2) Laboratory of Medical Immunology, School of Basic Medical Science, Peking University, 38 Xueyuan Road, Beijing, 100083, P.R. China;(3) Beijing Genomics Institute, Chinese Academy of Sciences, Beijing Airport Industrial Zone B-6, Shunyi, Beijing, 101300, P.R. China;(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 |
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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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Keywords: | apoptosis gastric cancer nuclear translocation programmed cell death 5 |
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