title: Characterization of Fc gamma receptor IIb expression within abdominal aortic aneurysm.
abstract: To evaluate protein profiles and Fc gamma receptor IIb (FCGRIIB) expression in abdominal aortic aneurysm (AAA) compared to the expression in normal aortas.
  
  
  
  We performed a protein array to study the protein expression profiles within AAA and normal aortic tissues. FCGRIIB was found to be significantly elevated in AAA samples. Quantitative PCR and Western blot analyses were performed to study the expression of FCGRIIB in AAA compared to that in normal aortic tissue. Immunohistochemistry was used to locate FCGRIIB and the B cell marker CD19 in AAA and normal aortas specimens.
  
  
  
  FCGRIIB was significantly elevated in AAA tissues in both mRNA (AAA vs. normal control: about 5.8 folds, p < 0.001) and protein levels (AAA vs. normal control: about 6.3 folds, p < 0.001). In AAA specimens, immunohistochemistry revealed that FCGRIIB localized to the area of inflammatory infiltrates, which consisted of CD 19+B cells and other inflammatory cells. FCGRIIB and CD19 were undetectable in normal aortas.
  
  
  
  FCGRIIB was significantly elevated in AAA tissues compared to normal aortas. FCGRIIB may be involved in the pathogenesis of AAA by regulation of inflammatory reactions.
authors.affiliation: Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Department of Breast Cancer, Cancer Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China.
authors.forename: Ci-Qiu
authors.initials: CQ
authors.lastname: Yang
authors.affiliation: Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, China.
authors.forename: Si-Wen
authors.initials: SW
authors.lastname: Wang
authors.affiliation: Laboratory of General Surgery, The First Affiliated Hospital of Sun Yat-sen University, China; Guangdong Engineering Laboratory for Diagnosis and Treatment of Vascular Disease, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.affiliation: Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, China; Guangdong Engineering Laboratory for Diagnosis and Treatment of Vascular Disease, China; Vascular Surgical Disease Research Center of Guangdong Province, China. Electronic address: shenmingwang@hotmail.com.
authors.forename: Shen-Ming
authors.initials: SM
authors.lastname: Wang
mesh_terms: D000368:Aged; D018941:Antigens, CD19 / Q000032:analysis; D001012:Aorta, Abdominal / Q000473:pathology*; D017544:Aortic Aneurysm, Abdominal / Q000235:genetics / Q000473:pathology*; D001402:B-Lymphocytes / Q000473:pathology; D015153:Blotting, Western; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007249:Inflammation / Q000235:genetics / Q000473:pathology; D008297:Male; D012333:RNA, Messenger / Q000235:genetics; D017452:Receptors, IgG / Q000032:analysis* / Q000235:genetics; D015854:Up-Regulation
chemical_list: D018941:Antigens, CD19; C000604811:CD19 molecule, human; C080571:Fc gamma receptor IIB; D012333:RNA, Messenger; D017452:Receptors, IgG
keywords: Abdominal aortic aneurysm; B cells; Fc gamma receptor IIb; Inflammation