T sytotoxiset solut ja kehovieras genomiaines

(Tämä strategia vaatii kyllä henkilöltä hyvää  yleiskunnon hoitoa niin että  kehon immuunipuolustuksen  resurssit eivät  huonone.  T-solujen tulisi tunnistaa vieras genomimateria, prosessoida sitä pätkä pätkältä ja saada  siten  spesifisiä  vasta-aineita   järjestelmän   vasta-aineita valmistavalta osalta).

 

Prostate. 2016 Apr;76(5):456-68. doi: 10.1002/pros.23136. Epub 2015 Dec 30.

The STEAP1(262-270) peptide encapsulated into PLGA microspheres elicits strong cytotoxic T cell immunity in HLA-A*0201 transgenic mice--A new approach to immunotherapy against prostate carcinoma.

Herrmann VL¹, Wieland DE², Legler DF³, Wittmann V², Groettrup M^1,3.

Abstract

BACKGROUND:

PLGA microsphere-based vaccination has been proven to be effective in immunotherapy of syngeneic model tumors in mice. The critical step for the translation to humans is the identification of immunogenic tumor antigens and potent vaccine formulations to overcome immune tolerance.

METHODS:

HLA-A*0201 transgenic mice were immunized with eight different human prostate cancer peptide antigens co-encapsulated with TLR ligands into PLGA microspheres and analyzed for antigen-specific and functional cytotoxic T lymphocyte responses.

RESULTS:

Only vaccination with STEAP1(262-270) peptide encapsulated in PLGA MS could effectively crossprime CTLs in vivo. These CTLs recognized STEAP1(262-270) /HLA-A*0201 complexes on human dendritic cells and prostate cancer cell lines and specifically lysed target cells in vivo. Vaccination with PLGA microspheres was much more potent than with incomplete Freund's adjuvant.

CONCLUSIONS:

Our data suggests that there exist great differences in the immunogenicity of human PCa peptide antigens despite comparable MHC class I binding characteristics. Immunogenic STEAP1(262-270) peptide encapsulated into PLGA microspheres however was able to induce vigorous and functional antigen-specific CTLs and therefore is a promising novel approach for immunotherapy against advanced stage prostate cancer.

© 2015 Wiley Periodicals, Inc.

KEYWORDS:

PLGA microspheres; STEAP; cancer vaccine; prostate cancer; tumor antigen

PMID:

26715028

DOI:

10.1002/pros.23136