title: Technical advancement in regulatory T cell isolation and characterization using CD127 expression in patients with malignant glioma treated with autologous dendritic cell vaccination.
abstract: We have successfully treated over two hundred high-grade glioma (HGG) patients with immunotherapy consisting of vaccination with autologous dendritic cells (DCs) loaded with autologous tumour lysate. It has been documented that regulatory T cells (Treg) can counteract anti-tumour immune responses. Therefore, monitoring of Treg in these patients is essential. Up till now, Treg have been characterized based on the expression of the transcription factor Foxp3. Here, we validated IL-7 receptor alpha subunit (CD127)dim expression as a marker for human Treg within HGG patients, as a less laborious assay for routine use in tumour vaccination trials. We noted a strong positive correlation between Foxp3 expression and CD127dim expression in CD4+CD25+ and CD4+ cells. The suppressive function of CD4+CD127dim cells was assessed in an allogeneic mixed lymphocyte reaction (MLR). We conclude that CD127 staining is a fast, well-suited and reproducible Treg monitoring tool in HGG patients treated with immunotherapy.
authors.affiliation: Department of Neurosurgery, University Hospital Leuven, Leuven, Belgium. hilko.ardon@uz.kuleuven.be
authors.forename: H
authors.initials: H
authors.lastname: Ardon
authors.forename: B
authors.initials: B
authors.lastname: Verbinnen
authors.forename: W
authors.initials: W
authors.lastname: Maes
authors.forename: T
authors.initials: T
authors.lastname: Beez
authors.forename: S
authors.initials: S
authors.lastname: Van Gool
authors.forename: S
authors.initials: S
authors.lastname: De Vleeschouwer
mesh_terms: D000951:Antigens, Neoplasm / Q000276:immunology / Q000378:metabolism; D015415:Biomarkers / Q000378:metabolism*; D015704:CD4 Antigens / Q000096:biosynthesis; D019496:Cancer Vaccines; D002478:Cells, Cultured; D016543:Central Nervous System Neoplasms / Q000097:blood / Q000175:diagnosis / Q000276:immunology* / Q000628:therapy; D003713:Dendritic Cells / Q000276:immunology / Q000378:metabolism; D051858:Forkhead Transcription Factors / Q000096:biosynthesis; D005910:Glioma / Q000097:blood / Q000175:diagnosis / Q000276:immunology* / Q000628:therapy; D006801:Humans; D053645:Interleukin-2 Receptor alpha Subunit / Q000096:biosynthesis; D053699:Interleukin-7 Receptor alpha Subunit / Q000378:metabolism*; D007959:Lymphocyte Culture Test, Mixed; D008991:Monitoring, Physiologic; D016176:T-Lymphocyte Subsets / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D014182:Transplantation, Autologous
chemical_list: D000951:Antigens, Neoplasm; D015415:Biomarkers; D015704:CD4 Antigens; D019496:Cancer Vaccines; C418974:FOXP3 protein, human; D051858:Forkhead Transcription Factors; D053645:Interleukin-2 Receptor alpha Subunit; D053699:Interleukin-7 Receptor alpha Subunit