The CD133+ tumor stem-like cell-associated antigen may elicit highly intense immune responses against human malignant glioma

J Neurooncol. 2011 Nov;105(2):149-57. doi: 10.1007/s11060-011-0572-y. Epub 2011 Apr 11.

Abstract

To explore the immunogenicity of glioma stem-like cell-associated antigens (SAAs) from sorted or unsorted glioma tumor stem-like cells (TSCs) as well as irradiated TSCs. Two primary human malignant glioma lines (SHG62, SHG66) and U87 cell line were primarily cultured in the serum-free medium (SFM) supplemented with EGF/bFGF. TSCs were identified by their self-renewal, multi-lineage differentiation and tumorigenic activity. To prepare SAAs in vitro, CD133+ TSCs were sorted either by magnetic cell sorting or with irradiation (6 Gy).The cytotoxicity induced by autogenous myeloid dendritic cell (DC)-mediated SAA-specific cytotoxic T lymphocytes (CTLs) was assessed by the Just Another Method test. SHG62, SHG66, and U87 cells contained TSCs. CD133+ SAAs-specific CTLs were significantly more cytotoxic than effector cells loaded with unsorted SAA (P < 0.05). Effector cells loaded with irradiated SAAs were more cytotoxic than those with regular SAAs (P < 0.01). SAAs from CD133+ TSCs and irradiated TSCs provide highly immunogenic antigens. TSCs might be a novel source of antigens for DC vaccination against malignant gliomas.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • AC133 Antigen
  • Animals
  • Antigens, CD / immunology*
  • Antigens, CD / metabolism
  • Brain Neoplasms / immunology*
  • Brain Neoplasms / metabolism
  • Brain Neoplasms / pathology
  • Cell Survival
  • Dendritic Cells / immunology
  • Dendritic Cells / metabolism
  • Dendritic Cells / pathology
  • Female
  • Flow Cytometry
  • Glioma / immunology*
  • Glioma / metabolism
  • Glioma / pathology
  • Glycoproteins / immunology*
  • Glycoproteins / metabolism
  • Humans
  • Immunoenzyme Techniques
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Middle Aged
  • Neoplastic Stem Cells / immunology*
  • Neoplastic Stem Cells / metabolism
  • Neoplastic Stem Cells / pathology
  • Peptides / immunology*
  • Peptides / metabolism
  • T-Lymphocytes, Cytotoxic / immunology*
  • T-Lymphocytes, Cytotoxic / metabolism
  • T-Lymphocytes, Cytotoxic / pathology
  • Tumor Cells, Cultured

Substances

  • AC133 Antigen
  • Antigens, CD
  • Glycoproteins
  • PROM1 protein, human
  • Peptides
  • Prom1 protein, mouse