Abstract
Glioblastoma multiforme (GBM) is the most aggressive primary human brain tumor. The relatively high amount of T regulatory lymphocytes present in the tumor, contributes to the establishment of an immunosuppressive microenvironment. Samples of peripheral blood were collected from GBM patients and healthy controls and a purified population of Treg (CD4+/ CD25bright) was isolated using flow cytometric cell sorting. Treg migrating capacities toward human glioma cell line conditioned medium were evaluated through an in vitro migration test. Our data show that supernatants collected from GBM cell lines were more attractant to Treg when compared to complete standard medium. The addition of an anti-CCL2 antibody to conditioned medium decreased conditioned medium-depending Treg migration, suggesting that CCL2 (also known as Monocyte Chemoattractant Protein, MCP-1) is implicated in the process. The number of circulating CD4+/μL or Treg/μL was similar in GBM patients and controls. Specific Treg markers (FOXP3; CD127; Helios; GITR; CTLA4; CD95; CCR2, CCR4; CCR7) were screened in peripheral blood and no differences could be detected between the two populations. These data confirm that the tumor microenvironment is attractive to Treg, which tend to migrate toward the tumor region changing the immunological response. Though we provide evidence that CCL2 is implicated in Treg migration, other factors are needed as well to provide such effect.
| Original language | English |
|---|---|
| Pages (from-to) | 353-363 |
| Number of pages | 11 |
| Journal | Journal of Neuro-Oncology |
| Volume | 115 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Dec 2013 |
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Keywords
- CCL2
- Glioblastoma multiforme
- Irradiation
- Treg
ASJC Scopus subject areas
- Clinical Neurology
- Cancer Research
- Oncology
- Neurology
Cite this
Circulating T regulatory cells migration and phenotype in glioblastoma patients : An in vitro study. / Vasco, Chiara; Canazza, Alessandra; Rizzo, Ambra; Mossa, Adele; Corsini, Elena; Silvani, Antonio; Fariselli, Laura; Salmaggi, Andrea; Ciusani, Emilio.
In: Journal of Neuro-Oncology, Vol. 115, No. 3, 12.2013, p. 353-363.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Circulating T regulatory cells migration and phenotype in glioblastoma patients
T2 - An in vitro study
AU - Vasco, Chiara
AU - Canazza, Alessandra
AU - Rizzo, Ambra
AU - Mossa, Adele
AU - Corsini, Elena
AU - Silvani, Antonio
AU - Fariselli, Laura
AU - Salmaggi, Andrea
AU - Ciusani, Emilio
PY - 2013/12
Y1 - 2013/12
N2 - Glioblastoma multiforme (GBM) is the most aggressive primary human brain tumor. The relatively high amount of T regulatory lymphocytes present in the tumor, contributes to the establishment of an immunosuppressive microenvironment. Samples of peripheral blood were collected from GBM patients and healthy controls and a purified population of Treg (CD4+/ CD25bright) was isolated using flow cytometric cell sorting. Treg migrating capacities toward human glioma cell line conditioned medium were evaluated through an in vitro migration test. Our data show that supernatants collected from GBM cell lines were more attractant to Treg when compared to complete standard medium. The addition of an anti-CCL2 antibody to conditioned medium decreased conditioned medium-depending Treg migration, suggesting that CCL2 (also known as Monocyte Chemoattractant Protein, MCP-1) is implicated in the process. The number of circulating CD4+/μL or Treg/μL was similar in GBM patients and controls. Specific Treg markers (FOXP3; CD127; Helios; GITR; CTLA4; CD95; CCR2, CCR4; CCR7) were screened in peripheral blood and no differences could be detected between the two populations. These data confirm that the tumor microenvironment is attractive to Treg, which tend to migrate toward the tumor region changing the immunological response. Though we provide evidence that CCL2 is implicated in Treg migration, other factors are needed as well to provide such effect.
AB - Glioblastoma multiforme (GBM) is the most aggressive primary human brain tumor. The relatively high amount of T regulatory lymphocytes present in the tumor, contributes to the establishment of an immunosuppressive microenvironment. Samples of peripheral blood were collected from GBM patients and healthy controls and a purified population of Treg (CD4+/ CD25bright) was isolated using flow cytometric cell sorting. Treg migrating capacities toward human glioma cell line conditioned medium were evaluated through an in vitro migration test. Our data show that supernatants collected from GBM cell lines were more attractant to Treg when compared to complete standard medium. The addition of an anti-CCL2 antibody to conditioned medium decreased conditioned medium-depending Treg migration, suggesting that CCL2 (also known as Monocyte Chemoattractant Protein, MCP-1) is implicated in the process. The number of circulating CD4+/μL or Treg/μL was similar in GBM patients and controls. Specific Treg markers (FOXP3; CD127; Helios; GITR; CTLA4; CD95; CCR2, CCR4; CCR7) were screened in peripheral blood and no differences could be detected between the two populations. These data confirm that the tumor microenvironment is attractive to Treg, which tend to migrate toward the tumor region changing the immunological response. Though we provide evidence that CCL2 is implicated in Treg migration, other factors are needed as well to provide such effect.
KW - CCL2
KW - Glioblastoma multiforme
KW - Irradiation
KW - Treg
UR - http://www.scopus.com/inward/record.url?scp=84890254848&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890254848&partnerID=8YFLogxK
U2 - 10.1007/s11060-013-1236-x
DO - 10.1007/s11060-013-1236-x
M3 - Article
C2 - 24005771
AN - SCOPUS:84890254848
VL - 115
SP - 353
EP - 363
JO - Journal of Neuro-Oncology
JF - Journal of Neuro-Oncology
SN - 0167-594X
IS - 3
ER -