title: Decreased TCR zeta-chain expression in T cells from patients with acquired aplastic anaemia.
abstract: In aplastic anaemia, T cells have a central role in the pathophysiology of bone marrow destruction. This study showed that T cells from patients with aplastic anaemia expressed decreased T-cell receptor (TCR) zeta-chain protein and mRNA levels compared to healthy controls. Patients with decreased TCR zeta-chain showed an abnormal response in intracellular calcium following stimulation through the TCR. We also observed an altered pattern of the transcription factors CREMalpha and Elf-1 that are implicated in zeta-chain transcription. We concluded that TCR zeta-chain expression was decreased in the majority of patients with aplastic anaemia, regardless of disease activity or treatment status.
authors.affiliation: Hematology Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA. elenasolomou@hotmail.com
authors.forename: Elena E
authors.initials: EE
authors.lastname: Solomou
authors.forename: Susan
authors.initials: S
authors.lastname: Wong
authors.forename: Valeria
authors.initials: V
authors.lastname: Visconte
authors.forename: Federica
authors.initials: F
authors.lastname: Gibellini
authors.forename: Neal S
authors.initials: NS
authors.lastname: Young
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000741:Anemia, Aplastic / Q000276:immunology*; D002118:Calcium / Q000378:metabolism; D016022:Case-Control Studies; D002648:Child; D051786:Cyclic AMP Response Element Modulator / Q000378:metabolism; D036383:Ephrin-A2 / Q000378:metabolism; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007424:Intracellular Fluid / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012333:RNA, Messenger / Q000032:analysis*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D017422:Sequence Analysis, DNA; D013601:T-Lymphocytes / Q000378:metabolism*
chemical_list: D036383:Ephrin-A2; D008565:Membrane Proteins; D012333:RNA, Messenger; D011948:Receptors, Antigen, T-Cell; C054979:antigen T cell receptor, zeta chain; D051786:Cyclic AMP Response Element Modulator; D002118:Calcium