home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9605a.zip
/
M9650152.TXT
< prev
next >
Wrap
Text File
|
1996-03-09
|
3KB
|
41 lines
Document 0152
DOCN M9650152
TI Purification and characterization of a naturally processed hepatitis B
virus peptide recognized by CD8+ cytotoxic T lymphocytes.
DT 9605
AU Tsai SL; Chen MH; Yeh CT; Chu CM; Lin AN; Chiou FH; Chang TH; Liaw YF;
Liver Research Unit, Chang Gung Memorial Hospital, Chang Gung; Medical
College, Taipei, Taiwan.
SO J Clin Invest. 1996 Jan 15;97(2):577-84. Unique Identifier : AIDSLINE
MED/96149188
AB In vitro studies in patients with hepatitis B virus (HBV) infection have
suggested that hepatocytolysis induced by CD8+ cytotoxic T lymphocytes
(CTLs) is the most important effector pathway in eliminating infected
cells. The recognition is implicated in the endogenously processed HBV
antigens in the context of HLA class I molecules presented on the liver
cell membrane. However, the naturally occurring HBV peptide antigens
have not yet been demonstrated. We report here that a naturally
processed peptide antigen P2 was isolated from HLA class I molecules of
HBV-infected liver cell membrane. The P2 peptide exhibited the activity
of sensitizing target cells for lysis by CD8+ CTLs. The P2 sequence
(YVNVNMGLK) purified from liver tissue was in concordance with that
encoded by the viral genome for the HBV nucleocapsid antigen or HBcAg
88-96. P2 peptide could also be isolated from the EBV-transformed B
cells that were transfected by HBcAg-expressing vector. The P2 epitope,
sharing the HLA-A11 binding motifs, was recognized by HLA-A11-restricted
CD8+ CTLs. The data provided direct evidence that, in hepatitis B
patients, antigenic peptides of HBV were processed by hepatocytes,
presented with the class I MHC molecules, and recognized by CD8+ CTLs.
DE Adult Amino Acid Sequence Base Sequence Carcinoma,
Hepatocellular/IMMUNOLOGY/MICROBIOLOGY CD8-Positive
T-Lymphocytes/*IMMUNOLOGY Epitopes Hepatitis B Antigens/*IMMUNOLOGY
Hepatitis B Core Antigens/*IMMUNOLOGY Hepatitis B Virus/*IMMUNOLOGY
Human HLA-A Antigens/IMMUNOLOGY Male Molecular Sequence Data
Peptides/IMMUNOLOGY Protein Processing, Post-Translational Support,
Non-U.S. Gov't T-Lymphocyte Subsets/IMMUNOLOGY T-Lymphocytes,
Cytotoxic/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).