title: [The effect of epidermal growth factor on the pathologic changes of gastric mucosa in SD rats with chronic atrophic gastritis].
abstract: OBJECTIVE
  To study the effect of epidermal growth factor (EGF) on the pathologic changes of gastric mucosa in rats with chronic atrophic gastritis(CAG).
  
  
  METHODS
  The established rat models of CAG were divided into therapy group and control group. The rats in the therapy group received EGF 10 microg/kg subcutaneously (SC), whereas these in the control group the same volume of normal saline SC. 12 weeks later, all rats were killed by cervical dislocation and their gastric mucosa were examined with microscope.
  
  
  RESULTS
  The grade of inflammatory cell infiltration in the therapy group was lower than that in the control group (P < 0.01). The thickness of gastric mucosal gland layer was (215.0 +/- 20.7) microm in the therapy group and (139.2 +/- 13.8) microm in the control group (P < 0.01). The ratio of the thickness of gastric mucosal glands and muscularis mucosa(L(1)/L(2)) was 2.70 +/- 0.34 in the therapy group and 1.27 +/- 0.27 in the control group (P < 0.01). The number of gastric glands in 1 mm length of mucosal layer was 26.20 +/- 1.27 in the therapy group and 19.90 +/- 1.78 in the control group (P < 0.01). In the therapy group, the gastric glands were rearranged in order, without signs of malignant proliferation. The width of the expression of proliferating cell nuclear antigen (PCNA ) of gastric mucosa was higher in the therapy group than in the control group [(77.70 +/- 4.16) microm vs (54.40 +/- 4.54) microm, P < 0.01].
  
  
  CONCLUSIONS
  EGF played a therapeutic role in reversing the gastric mucosal atrophy of the rats with CAG. It promoted the expression of PCNA, which induced a protective proliferation of the gastric mucosal lesions in the rats with CAG.
authors.affiliation: Department of Gastroenterology of Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hongzhou 310016, China.
authors.forename: J
authors.initials: J
authors.lastname: Wu
authors.forename: J
authors.initials: J
authors.lastname: Si
authors.forename: Q
authors.initials: Q
authors.lastname: Cao
authors.forename: W
authors.initials: W
authors.lastname: Lü
authors.forename: J
authors.initials: J
authors.lastname: Weng
authors.forename: B
authors.initials: B
authors.lastname: Lü
authors.forename: N
authors.initials: N
authors.lastname: Dai
mesh_terms: D000818:Animals; D004815:Epidermal Growth Factor / Q000627:therapeutic use*; D005753:Gastric Mucosa / Q000187:drug effects / Q000473:pathology*; D005757:Gastritis, Atrophic / Q000188:drug therapy* / Q000473:pathology; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D018809:Proliferating Cell Nuclear Antigen; D004815:Epidermal Growth Factor