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Relation of neuroendocrine cells to transforming growth factor-alpha and epidermal growth factor receptor expression in gastric adenocarcinomas: Prognostic implications

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Pathology & Oncology Research

Abstract

The presence of neuroendocrine (NE) cells in gastric adenocarcinoma (GCa) is well documented, however, their significance is controversial. There is no evidence in the literature concerning the possible effect of these cells on the expression of TGF-a and EGFR, which are believed to confer growth advantage to tumor cells. 101 partial or total gastrectomy specimens from patients operated for conventional gastric adenocarcinoma were included in the study. In each case immunohistochemistry was performed on sequential tissue sections for chromogranin A (ChrA), TGF-a and EGFR. Samples were graded based on the number of ChrA-positive cells (0–3). TGF-a and EGFR expressions were evaluated according to both the intensity (0–2) and quantification of the positively stained areas (0–3). Follow-up data was available in 54 patients. Twenty-seven patients died of disease, while 27 patients were alive with a follow-up of at least 15 months. ChrA expression was detected in 54.4% of the tumor specimens. TGF-a was stained positively in 42.6% and EGFR in 49.5% of the cases. NE cells in GCa was related to TGF-a (p<0.0001) and EGFR expression (p<0.05), and TGF-a/EGFR coexpression (p<0.001). Among histopathologic variables, the presence of NE cells was significantly related to grade, stage and lymph node status. Although the presence of NE cells had no effect on survival, the expression of EGFR (p<0.0001) and TGF-a (p=0.002) were related to survival. The results of our study suggest that the presence of NE cells may have an effect on the expression of TGF-a and EGFR in GCa, and the autocrine mechanism between TGF-α and EGFR plays an important role in the prognosis of gastric carcinoma.

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Correspondence to Cigdem Celikel.

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This work was supported by the Marmara University Research Committee

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Celikel, C., Eren, F., Gulluoglu, B. et al. Relation of neuroendocrine cells to transforming growth factor-alpha and epidermal growth factor receptor expression in gastric adenocarcinomas: Prognostic implications. Pathol. Oncol. Res. 13, 215–226 (2007). https://doi.org/10.1007/BF02893502

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  • DOI: https://doi.org/10.1007/BF02893502

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