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Tumor-associated Peptides Binding Promiscuously to Human Leukocyte Antigen (HLA) Class II Molecules

a peptide and human leukocyte technology, applied in the direction of peptide/protein ingredients, vector-based foreign material introduction, dna/rna fragmentation, etc., can solve the problem of wasting a lot of research effor

Inactive Publication Date: 2008-08-28
IMMATICS BIOTECHNOLOGIES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, much research effort is being expended to identify additional tumour associated antigens.

Method used

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  • Tumor-associated Peptides Binding Promiscuously to Human Leukocyte Antigen (HLA) Class II Molecules
  • Tumor-associated Peptides Binding Promiscuously to Human Leukocyte Antigen (HLA) Class II Molecules
  • Tumor-associated Peptides Binding Promiscuously to Human Leukocyte Antigen (HLA) Class II Molecules

Examples

Experimental program
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example 1

HLA Class II Expression by RCC

[0173]Under normal, non-inflammatory conditions, HLA class II molecules should only be expressed by cells of the hematopoietic system and by the thymic epithelium (Mach, B., V. Steimle, E. Martinez-Soria, and W. Reith. 1996. Regulation of MHC class II genes: lessons from a disease. Annu. Rev. Immunol. 14:301-331). The situation changes during inflammation. HLA class II expression can be induced in most cell types and tissues by IFNγ (Leib und Gut-Landmann, S., J. M. Waldburger, M. Krawczyk, L. A. Otten, T. Suter, A. Fontana, H. Acha-Orbea, and W. Reith. 2004. Mini-review: Specificity and expression of CIITA, the master regulator of MHC class II genes. Eur. J. Immunol. 34:1513-1525). As RCC incidence is often accompanied by inflammatory events (Blay, J. Y., J. F. Rossi, J. Wijdenes, C. Menetrier-Caux, S. Schemann, S, Negrier, T. Philip, and M. Favrot. 1997. Role of interleukin-6 in the paraneoplastic inflammatory syndrome associated with renal-cell carci...

example 2

Immuno-Histochemical Staining of HLA Class II Molecules

[0174]The inventors analyzed HLA class II expression of ten RCC specimens comprising histological clear cell and papillary renal carcinoma by immuno-histochemical staining and found that all investigated samples revealed class II positive tumor cells. As exemplified in FIG. 1A, a pronounced HLA class II expression was often detected at the margin of the tumor. In these areas the inventors observed a close spatial correlation of HLA positive tumor cells with tumor infiltrating immune cells as illustrated by the visualization of CD68-positive macrophages in a serial tissue section (FIG. 1B). In RCC revealing a more papillary architecture, the expression of HLA class II molecules was more evenly distributed throughout the tumor (FIG. 1C, E, G). The comparison of the HLA class II and CD68 immuno-histochemical staining patterns in serial tissue sections clearly demonstrates that in addition to macrophages, tumor cells also express HL...

example 3

Analysis of Expression of IFNγ and Gene Transcripts Induced by IFNγ

[0175]Additionally, the inventors investigated HLA class II expression by comparative gene expression analysis using oligonucleotide microarrays. With this technique the inventors were able to assess the overall HLA class II expression in the dissected tumors regardless of the expressing cell types. The inventors analyzed differential expression in four tumors, RCC149, RCC180, RCC190, and RCC211, compared with normal reference kidney. In all four tumors, genes encoding HLA class II molecules were found to be over-expressed (Table 2). One possible reason for this might be an induced expression by IFNγ and for this reason the inventors looked for other genes known to be up-regulated by interferons (Kolchanov, N. A., E. V. Ignatieva, E. A. Ananko, O. A. Podkolodnaya, I. L. Stepanenko, T. I. Merkulova, M. A. Pozdnyakov, N. L. Podkolodny, A. N. Naumochkin, and A. G. Romashchenko. 2002. Transcription Regulatory Regions Dat...

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Abstract

The present invention relates to immunotherapeutic methods, and molecules and cells for use in immunotherapeutic methods. In particular, the present invention relates to the immunotherapy of cancer. The present invention furthermore relates to tumour-associated T-helper cell peptide epitopes, alone or in combination with other tumour-associated peptides, that serve as active pharmaceutical ingredients of vaccine compositions which stimulate anti-tumour immune responses. In particular, the present invention relates to 49 novel peptide sequences derived from HLA class II molecules of human tumour cell lines which can be used in vaccine compositions for eliciting anti-tumour immune responses.

Description

RELATED APPLICATIONS[0001]This application is a divisional application of U.S. application Ser. No. 11 / 912,670, which was filed on Oct. 25, 2007, which is the National Phase application of PCT / EP2006 / 008642, filed Sep. 5, 20006, which claims priority to European Patent Application No. 05019254.1, filed Sep. 5, 2005, the entire contents of which are hereby incorporated.[0002]The present invention relates to immunotherapeutic methods, and molecules and cells for use in immunotherapeutic methods. In particular, the present invention relates to the immunotherapy of cancer, in particular renal and colon cancer. The present invention furthermore relates to tumour-associated T-helper cell peptide epitopes, alone or in combination with other tumour-associated peptides, that serve as active pharmaceutical ingredients of vaccine compositions which stimulate anti-tumour immune responses. In particular, the present invention relates to 49 novel peptide sequences derived from HLA class II molecu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K38/10C07K7/08C07H21/00C12N15/63C12N5/08A61P35/00A61K35/12A61K31/7088C12N1/00C12P21/02
CPCC07K14/4748A61K35/17A61K38/17A61K48/00C07K14/47C07K14/7051C12N5/0638A61K38/00A61P35/00A61P37/02A61P37/04C12N15/11C12N15/63
Inventor DENGJEL, JORN
Owner IMMATICS BIOTECHNOLOGIES GMBH
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