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Clinicopathological significance and relations of Caspase-3 expression, cell proliferation and apoptosis in gastric cancer and the precancerous lesions

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The Chinese-German Journal of Clinical Oncology

Abstract

Objective

We investigated the relationship between the expression of Caspase-3, cell proliferation and apoptosis in gastric cancer and their precancerous lesions, to explore the tumorigenesis of the stomach mucosa.

Methods

Caspase-3 expression in 13 normal gastric mucosa, 6 chronic atrophic gastritis (CAG), 31 intestinal metaplasia (IM), 114 dysplasia (DYS) and 20 gastric carcinomas were investigated immunohistochemically. Cell proliferation was evaluated with anti-Ki-67 immunostaining and apoptosis was evaluated using DNA fragmentation in situ by TdT-mediated dUTP biotin nick end labeling (TUNEL) method.

Results

Caspase-3 mild-moderately positive expression was observed in most of normal superficial epithelia, its positively polar distribution in normal mucosa, CAG, IM, DYS and gastric carcinomas changed as seen in TUNEL, and so did the positive rate. Caspase-3 protein expression showed significantly positive correlation with the number of apoptotic cells labeled with TUNEL (correlation coefficient r = 0.94; P < 0.01). Ki-67 expression showed a negative but not significant correlation trend with Caspase-3 (correlation coefficient r = −0.23; P > 0.05).

Conclusion

Caspase-3 protein expression was up-regulated from CAG to IM and mild-moderate atypical dysplasia, but down-regulated in severe dysplasia and gastric carcinoma, indicating that inactivity or reduced expression of Caspase-3 is closely correlated with carcinogenesis of the stomach mucosa.

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Authors and Affiliations

  1. The Fourth Laboratory of Cancer Institute, Department of Tumor Pathology of General Surgery Institute, First Affiliated Hospital of China Medical University, Shenyang, 110001, China

    XiaoBin Hu, Jing Zhao, Lin Yang & Yan Xin

Authors
  1. XiaoBin Hu
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  2. Jing Zhao
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  3. Lin Yang
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  4. Yan Xin
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Corresponding author

Correspondence to Yan Xin.

Additional information

Supported by grants from the National Natural Science Foundation of China (No. 30070845, 30271607, 30600286); Climbing Scholars of the Universities in Liaoning Province (2009–2011).

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Hu, X., Zhao, J., Yang, L. et al. Clinicopathological significance and relations of Caspase-3 expression, cell proliferation and apoptosis in gastric cancer and the precancerous lesions. Chin. -Ger. J. Clin. Oncol. 8, 665–668 (2009). https://doi.org/10.1007/s10330-009-0157-9

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  • DOI: https://doi.org/10.1007/s10330-009-0157-9

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