title: Relationship between RGS5 expression and differentiation and angiogenesis of gastric carcinoma.
abstract: OBJECTIVE
  To explore the regulator of G-protein signaling 5 (RGS5) expression in gastric carcinoma and its association with differentiation and microvascular density (MVD).
  
  
  METHODS
  Expression of RGS5 and CD34 were examined in 76 cases of gastric carcinoma, including 22 cases with lymph node metastasis and 54 cases without lymph node metastasis determined by immunohistochemistry (IHC). MVD was assessed using CD34 monoclonal antibody. The presence of RGS5 and CD34 was analyzed by IHC using the Envision technique.
  
  
  RESULTS
  The RGS5 expression in gastric carcinoma was positively correlated with the differentiation of the tumor (r = 0.345, P < 0.001), but not related with age, gender, tumor size, clinical stage and lymph node metastasis (P > 0.05). The average MVD in the group with lymph node metastasis was significantly higher than that in the group without lymph node metastasis (P < 0.05). RGS5 expression was negatively correlated with the average MVD (P < 0.05).
  
  
  CONCLUSIONS
  RGS5 expression level in gastric carcinoma is associated with the differentiation and MVD of the tumor, and may be used as an important parameter for determining the prognosis of gastric carcinoma patients.
authors.affiliation: Department of Oncology, Nanjing General Hospital of Nanjing Military Command, Medical School of Nanjing University, Nanjing 210002, Jiangsu Province, China.
authors.forename: Jing-Hua
authors.initials: JH
authors.lastname: Wang
authors.forename: Wei-Sun
authors.initials: WS
authors.lastname: Huang
authors.forename: Cheng-Ru
authors.initials: CR
authors.lastname: Hu
authors.forename: Xiao-Xiang
authors.initials: XX
authors.lastname: Guan
authors.forename: Hang-Bo
authors.initials: HB
authors.lastname: Zhou
authors.forename: Long-Bang
authors.initials: LB
authors.lastname: Chen
mesh_terms: D000230:Adenocarcinoma / Q000098:blood supply / Q000737:chemistry* / Q000473:pathology; D018952:Antigens, CD34 / Q000032:analysis; D014408:Biomarkers, Tumor / Q000032:analysis*; D002454:Cell Differentiation; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008207:Lymphatic Metastasis; D008297:Male; D055806:Microvessels / Q000473:pathology*; D008875:Middle Aged; D009367:Neoplasm Staging; D009389:Neovascularization, Pathologic / Q000473:pathology*; D011379:Prognosis; D020710:RGS Proteins / Q000032:analysis*; D013274:Stomach Neoplasms / Q000098:blood supply / Q000737:chemistry* / Q000473:pathology
chemical_list: D018952:Antigens, CD34; D014408:Biomarkers, Tumor; D020710:RGS Proteins; C491349:RGS5 protein, human