scholarly journals Identification of an HLA-A24-restricted cytotoxic T lymphocyte epitope from human papillomavirus type-16 E6: The combined effects of bortezomib and interferon-γ on the presentation of a cryptic epitope

2006 ◽  
Vol 120 (3) ◽  
pp. 594-604 ◽  
Author(s):  
Satoko Morishima ◽  
Yoshiki Akatsuka ◽  
Akihiro Nawa ◽  
Eisei Kondo ◽  
Tohru Kiyono ◽  
...  
1995 ◽  
Vol 8 (3) ◽  
pp. 165-174 ◽  
Author(s):  
ASIS K. SARKAR ◽  
GUILLERMO TORTOLERO-LUNA ◽  
PRAMOD N. NEHETE ◽  
RALPH B. ARLINGHAUS ◽  
MICHELE FOLLEN MITCHELL ◽  
...  

2007 ◽  
Vol 81 (6) ◽  
pp. 2869-2879 ◽  
Author(s):  
Dai-Wei Liu ◽  
Yuh-Cheng Yang ◽  
Ho-Fan Lin ◽  
Mei-Fang Lin ◽  
Ya-Wen Cheng ◽  
...  

ABSTRACT Previously, we found that human papillomavirus type 16 (HPV-16) E5 protein is a tumor rejection antigen and can induce cytotoxic T-lymphocyte (CTL) activity. Therefore, in this study, human leukocyte antigen A*0201 (HLA-A*0201)-restricted human CTL epitopes of HPV-16 E5 protein were identified using a bioinformatics approach, and the abilities of these predicted peptides to induce an immune response in HLA-A*0201 transgenic mice were confirmed by assaying E5-specific CTLs and in vitro-generated CTLs from normal peripheral blood T lymphocytes of HLA-A2-positive human donors. Second, the CTL responses to HLA-A*0201 CTL epitopes (E5 63-71 and E7 11-20) were examined in HPV-16-infected patients with HLA-A2. Third, the effect of HLA-A-type alleles on CTL activities in response to the entire E5 and E7 proteins was examined in cervical cancer patients. E5 and E7 peptides (but not the whole proteins) stimulated E5- and E7-specific CTL recall responses in HPV-16- and HLA-A2-positive cervical cancer patients, and HPV-16 E5 and E7 proteins stimulated naïve T cells in HPV-16-negative cervical cancer patients with HLA-A11 and -A24 haplotypes. In summary, this is the first demonstration that E5 63-71 is an HLA-A*0201-restricted T-cell epitope of HPV-16 E5.


Virology ◽  
2002 ◽  
Vol 301 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Wen Jun Liu ◽  
Fengguang Gao ◽  
Kong Nan Zhao ◽  
Weiming Zhao ◽  
Germain J.G. Fernando ◽  
...  

1995 ◽  
Vol 18 (2) ◽  
pp. 86-94 ◽  
Author(s):  
Miriam A. Ossevoort ◽  
Mariet C. W. Feltkamp ◽  
Karin J. H. van Veen ◽  
Cornelis J. M. Melief ◽  
W. Martin Kast

1999 ◽  
Vol 73 (7) ◽  
pp. 6166-6170 ◽  
Author(s):  
Tracy Doan ◽  
Karen Herd ◽  
Michael Street ◽  
Gregory Bryson ◽  
Germain Fernando ◽  
...  

ABSTRACT Mice which coexpress human papillomavirus type 16 E7 and HLA A2.1 in peripheral squamous epithelium and thymic cortical epithelium are tolerant at the cytotoxic T-lymphocyte (CTL) level to E7 epitopes restricted through HLA A*0201 and H-2b (T. Doan, M. Chambers, M. Street, G. J. Fernando, K. Herd, P. Lambert, and R. Tindle, Virology 244:352–364, 1998). Here we used bone marrow-reconstituted radiation chimeras to distinguish whether E7-directed CTL tolerance was mediated peripherally by E7 expression in skin or centrally by E7 expression in thymus. In chimeric mice expressing E7 in skin and reconstituted with E7-naı̈ve bone marrow and E7-naı̈ve thymus, CTL responses to vaccine-administered E7 epitopes were not restored, i.e., the mice remained tolerant. In contrast, chimeric mice not expressing E7 in skin and reconstituted with E7-naı̈ve bone marrow and E7-expressing thymus had full E7-directed CTL responses. These results demonstrate that E7 protein expression in peripheral squamous epithelium is sufficient to tolerize the E7-directed CTL precursor repertoire. The data have implications for E7-mediated tumorigenesis and for the development of E7-based immunotherapeutic strategies, since peripheral immunological tolerance of tumor-associated antigens may create a barrier to effective immunotherapy.


1997 ◽  
Vol 78 (10) ◽  
pp. 2615-2620 ◽  
Author(s):  
J K√≥nya ◽  
V af Geijersstam ◽  
F Yuan ◽  
J Dillner ◽  
G Stuber ◽  
...  

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