Characterization of proteolipid protein-peptide-specific CD(4)(+) T cell of experimental allergic encephalomyelitis in Biozzi AB/H mice.
- Author:
Yong PENG
1
;
Chih-pin LIU
Author Information
- Publication Type:Journal Article
- MeSH: Amino Acid Sequence; Animals; CD4-Positive T-Lymphocytes; drug effects; immunology; metabolism; Cell Line; Encephalomyelitis, Autoimmune, Experimental; immunology; pathology; Interferon-gamma; metabolism; Interleukin-2; metabolism; Interleukin-4; metabolism; Mice; Mice, Inbred Strains; Molecular Sequence Data; Myelin Proteolipid Protein; chemistry; immunology; Peptide Fragments; administration & dosage; immunology; Spleen; cytology; immunology; metabolism; Th1 Cells; drug effects; immunology; metabolism
- From: Chinese Medical Journal 2002;115(4):521-524
- CountryChina
- Language:English
-
Abstract:
OBJECTIVETo detect the function of proteolipid protein (PLP) peptide (residues 56 - 70)-specific CD(4)(+) T cells in experimental allergic encephalomyelitis (EAE) in Biozzi AB/H mice (H-2A(g7)).
METHODSBiozzi AB/H mice were immunized by synthetic PLP(56 - 70) peptide (DYEYLINVIHAFQYV) which was emulsified by sonication with complete Freund's adjuvant, a EAE model proven histologically and clinically. Murine splenocytes and spinal cord infiltrated (SCI) T cells were stimulated by PLP(56 - 70), then the CD(4)(+) T cells were isolated by Dynabeads, and confirmed by staining with anti-CD(4) antibody. Finally, the IL2 bioassay and IFN-gamma/IL4 ELISA were done to detect T cell proliferation and cytokine secretion after PLP(56 - 70) stimulation.
RESULTSThe histology of murine spinal cord showed a great number of lymphocytes infiltrated the spinal cord; the clinical signs showed high scores (4.3) on the peak, as well as a good EAE model. After being isolated by Dynabeads, CD(4)(+) T cells showed high purification (> 99%) by staining with anti-CD(4) antibody. IL2 bioassay showed that those T cells were PLP(56 - 70)-specific T cells. ELISA showed that those T cells had high IFN-gamma/IL4 ratio, indicating that they are T helper 1 (Th1) cells.
CONCLUSIONSPLP(56 - 70)-specific splenocytes and SCI CD(4)(+) T cells in EAE from Biozzi AB/H mice were detected and showed that both of them were PLP(56 - 70)-specific Th1 cells. It is beneficial to understand what kind of role these T cells play in the development of EAE.
