title: Clinical significance of epidermal growth factor (EGF) expression in gastric cancer.
abstract: OBJECTIVE
  Epidermal growth factor (EGF) is involved in cancer development and proliferation. We measured preoperative serum EGF, and serologically investigated the clinical significance of EGF expression in gastric cancer. We also performed immunohistological staining at the same time, and investigated its relationship with serum EGF.
  
  
  METHODS
  There were 79 patients who underwent surgery for gastric cancer. For the measurement, one-step sandwich EIA was performed. Of 79 cases of gastric cancer in which the serum EGF level was measured, EGF immunostaining was performed in 50 cases.
  
  
  RESULTS
  In Serology, the EGF level was 345.6 +/- 260.6 pg/mL in m-sm cases, and 212.2 +/- 170.4 pg/mL in mp-si cases (p < 0.05). The EGF level was 294.4 +/- 236.0 pg/mL in ly0 cases, and 194.2 +/- 142.5 pg/mL in ly1-3 cases (p < 0.05). The EGF level was 323.5 +/- 233.4 pg/mL in cases staged IA-IB, and 202.8 +/- 176.8 pg/mL in cases staged II-IV (p < 0.05). In immunohistology the EGF positivity rate was 36.4% in the differentiated types, and 67.9% in the poorly differentiated types (p < 0.05). The EGF positivity rate was 25.0% in m-sm cases, and 63.1% in mp-si cases (p < 0.05).
  
  
  CONCLUSIONS
  The above findings suggest that EGF uptake by cancer cells increases when cancer cells are poorly differentiated, and that invasion in the surrounding tissue is severe.
authors.affiliation: Department of Surgery II, Tokyo Women's Medical University School of Medicine, Shinjuku, Tokyo, Japan. akiteruymd@ah.twmu.ac.jp
authors.forename: Akiteru
authors.initials: A
authors.lastname: Yamada
authors.forename: Noboru
authors.initials: N
authors.lastname: Saito
authors.forename: Shingo
authors.initials: S
authors.lastname: Kameoka
authors.forename: Makio
authors.initials: M
authors.lastname: Kobayashi
mesh_terms: D002277:Carcinoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004815:Epidermal Growth Factor / Q000032:analysis / Q000097:blood*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery
chemical_list: D004815:Epidermal Growth Factor