Generation of polyclonal CMV-specific T cells for the adoptive immunotherapy of glioblastoma.
Glioblastoma (GBM) is the most common primary brain cancer in adults and is virtually incurable. Recent studies have shown that cytomegalovirus (CMV) is present in majority of GBMs. To evaluate whether the CMV antigens pp65 and IE1, which are expressed in GBMs, could be targeted by CMV-specific T cells, we measured the frequency of T cells targeting pp65 and IE1 in the peripheral blood of a cohort of 11 sequentially diagnosed CMV-seropositive GBM patients, and evaluated whether it was feasible to expand autologous CMV-specific T cells for future clinical studies. All 11 CMV-seropositive GBM patients had T cells specific for pp65 and IE1 in their peripheral blood assessed by IFNγ enzyme-linked immunospot assay. However, the precursor frequency of pp65-specific T cells was decreased in comparison with healthy donors (P=0.001). We successfully reactivated and expanded CMV-specific T cells from 6 out of 6 GBM patients using antigen-presenting cells transduced with an adenoviral vector encoding pp65 and IE1. CMV-specific T-cell lines contained CD4 as well as CD8 T cells, recognized pp65 and IE1 targets and killed CMV-infected autologous GBM cells. Infusion of such CMV-specific T-cell lines may extend the benefits of T-cell therapy to patients with CMV GBMs.
Center for Cell and Gene Therapy, Baylor College of Medicine, The Methodist Hospital and Texas Children's Hospital, Houston, TX 77030, USA.
Alexia
A
Ghazi
Aidin
A
Ashoori
Patrick J
PJ
Hanley
Vita S
VS
Brawley
Donald R
DR
Shaffer
Yvonne
Y
Kew
Suzanne Z
SZ
Powell
Robert
R
Grossman
Zakaria
Z
Grada
Michael E
ME
Scheurer
Meenakshi
M
Hegde
Ann M
AM
Leen
Catherine M
CM
Bollard
Cliona M
CM
Rooney
Helen E
HE
Heslop
Stephen
S
Gottschalk
Nabil
N
Ahmed
D000328:Adult; D000368:Aged; D000956:Antigens, Viral / Q000276:immunology*; D001932:Brain Neoplasms / Q000276:immunology / Q000628:therapy* / Q000821:virology; D002469:Cell Separation; D003587:Cytomegalovirus / Q000276:immunology; D003586:Cytomegalovirus Infections / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005434:Flow Cytometry; D005909:Glioblastoma / Q000276:immunology / Q000628:therapy* / Q000821:virology; D006801:Humans; D016219:Immunotherapy, Adoptive / Q000379:methods*; D017403:In Situ Hybridization; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000276:immunology*
D000956:Antigens, Viral