title: [A comparative study on the expressions of IL-4, IFN-gamma and TNF-alpha in BMMNC of acute and chronic aplastic anemia patients].
abstract: OBJECTIVE
  To detect the induced levels of IL-4, IFN-gamma and TNF-alpha in the supernatant of bone marrow mononuclear cells (BMMNC) and compare the difference of immune status between acute (SAA) and chronic (CAA) aplastic anemia patients.
  
  
  METHODS
  Concentrations of IL-4, IFN-gamma and TNF-alpha in PHA-P-induced BMMNC supernatants were determined by ELISA assay in 11 SAA and 13 CAA patients as well as 16 controls. Concentration differences between the two groups were compared.
  
  
  RESULTS
  (1) The IFN-gamma and TNF-alpha levels in AA patients studied were much higher than that in controls, and IL-4 levels were normal in SAA group but elevated in CAA group. (2) TNF-alpha levels were comparable between the two AA groups, but both IL-4 and IFN-gamma levels were significantly different between them.
  
  
  CONCLUSIONS
  Enhanced cellular immunity seems to play an important role in the pathogenesis of SAA, and enhancement of both cellular and humoral immunity might contribute to the pathogenesis of CAA.
authors.affiliation: Department of Hematology, Xijing Hospital, The Fourth Military Medical University, Xian 710032, China.
authors.forename: T
authors.initials: T
authors.lastname: Zhang
authors.forename: B
authors.initials: B
authors.lastname: Sun
authors.forename: Q
authors.initials: Q
authors.lastname: Feng
authors.forename: Y
authors.initials: Y
authors.lastname: Yuan
authors.forename: H
authors.initials: H
authors.lastname: Zhu
authors.forename: L
authors.initials: L
authors.lastname: Liu
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000741:Anemia, Aplastic / Q000097:blood*; D001798:Blood Proteins / Q000096:biosynthesis*; D001854:Bone Marrow Cells / Q000378:metabolism*; D002908:Chronic Disease; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000097:blood; D015847:Interleukin-4 / Q000097:blood; D007963:Leukocytes, Mononuclear / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D001798:Blood Proteins; D014409:Tumor Necrosis Factor-alpha; D015847:Interleukin-4; D007371:Interferon-gamma