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• W135812030 abstract "AIM: To establish whether there are fundamental differences in the biochemistries of adenocarcinomas of the gastroesophageal junction (GEJ) and the squamous cell carcinomas of the lower third of the esophagus (LTE). METHODS: Between February 1, 1997 and February 1, 2000, we obtained tissue samples at the moment of resection from 54 patients for biochemical analysis. The full set of data could be comprehensively analyzed in 47 of 54 patients samples (81%). Of these, 29 were adenocarcinomas of the GEJ Siewert type I (n = 8), type II (n = 12), type III (n = 9), and 18 presented as squamous cell carcinomas of the LTE. We evaluated the mean values of 11-lysosomal enzyme and 1-cytosol protease activities of the tumorous and surrounding mucosae as well as their relative activities, measured as the ratio of activity in tumor and normal tissues from the same patient. These data were further analyzed to establish the correlation with tumor localization, TNM stage (lymph-node involvement), histological type (papillary, signet-ring cell, tubular), state of differentiation (good, moderate, poor), and survival (≤ 24 or ≥ 24 mo). RESULTS: In adenocarcinomas, the activity of α-mannosidase (AMAN), cathepsin B (CB) and dipeptidyl-peptidase I (DPP I) increased significantly as compared to the normal gastric mucosa. In squamous cell carcinomas of the esophagus, we also found a significant difference in the activity of cathepsin L and tripeptidyl-peptidase I in addition to these three. There was a statistical correlation of AMAN, CB, and DPP I activity between the level of differentiation of adenocarcinomas of the GEJ and lymph node involvement, because tumors with no lymph node metastases histologically confirmed as well-differentiated, showed a significantly lower activity. The differences in CB and DPP I activity correlated well with the differences in survival rates, since the CB and DPP I values of those who died within 24 mo following surgical intervention were significantly higher than of those who survived for 2 years or more. CONCLUSION: Adenocarcinomas of the GEJ form a homogenous group from a tumor-biochemical aspect, and differ from the biochemical characteristics of squamous cell carcinomas of the LTE on many points. When adenocarcinomas of the GEJs are examined at the preoperative phase, the ratio of the performed AMAN, CB, and DPP I enzymatic activity of the tissue sample from the tumor and adjacent intact mucosa within2 cm of the tumor may have a prognostic value even in the preoperative examination period, and may indicate that ranking of these patients into the neo-adjuvant treatment group should be considered. Key Words: Prognostic value, Lysosomal enzymes, Cardiac adenocarcinomas, Siewert classification, Esophageal squamous cell carcinoma Citation: Altorjay A, Paal B, Sohar N, Kiss J, Szanto I, Sohar I. Significance and prognostic value of lysosomal enzyme activities measured in surgically operated adenocarcinomas of the gastroesophageal junction and squamous cell carcinomas of the lower third of esophagus. World J Gastroenterol 2005; 11(37): 5751-5756 URL: https://www.wjgnet.com/1007-9327/full/v11/i37/5751.htm DOI: https://dx.doi.org/10.3748/wjg.v11.i37.5751" @default.
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• W135812030 date "2005-01-01" @default.
• W135812030 modified "2023-10-17" @default.
• W135812030 title "Significance and prognostic value of lysosomal enzyme activities measured in surgically operated adenocarcinomas of the gastroesophageal junction and squamous cell carcinomas of the lower third of esophagus" @default.
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• W135812030 doi "https://doi.org/10.3748/wjg.v11.i37.5751" @default.
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