Heat-shock protein peptide complex-96 vaccination for recurrent glioblastoma: a phase II, single-arm trial.

Abstract:

BACKGROUND:Outcomes for patients with recurrent glioblastoma multiforme (GBM) are poor and may be improved by immunotherapy. We investigated the safety and efficacy of an autologous heat-shock protein peptide complex-96 (HSPPC-96) vaccine for patients with recurrent GBM. METHODS:In this open-label, single-arm, phase II study, adult patients with surgically resectable recurrent GBM were given vaccine after gross total resection. The primary endpoint was overall survival at 6 months. Secondary endpoints included overall survival, progression-free survival, safety, and immune profiling. Outcome analyses were performed in the intention-to-treat and efficacy populations. RESULTS:Between October 3, 2007 and October 24, 2011, 41 patients underwent gross total resection of recurrent GBM and received a median of 6 doses of HSPPC-96 vaccine. Following treatment, 90.2% of patients were alive at 6 months (95% confidence interval [CI]: 75.9-96.8) and 29.3% were alive at 12 months (95% CI: 16.6-45.7). Median overall survival was 42.6 weeks (95% CI: 34.7-50.5). Twenty-seven (66%) patients were lymphopenic prior to therapy, and patients with lymphocyte counts below the cohort median demonstrated decreased overall survival (hazard ratio: 4.0; 95% CI: 1.4-11.8; P = .012). There were no treatment-related deaths. There were 37 serious (grades 3-5) adverse events reported, with 17 attributable to surgical resection and a single grade 3 constitutional event related to the vaccine. CONCLUSION:The HSPPC-96 vaccine is safe and warrants further study of efficacy for the treatment of recurrent GBM. Significant pretreatment lymphopenia may impact the outcomes of immunotherapy and deserves additional investigation.

journal_name

Neuro Oncol

journal_title

Neuro-oncology

authors

Bloch O,Crane CA,Fuks Y,Kaur R,Aghi MK,Berger MS,Butowski NA,Chang SM,Clarke JL,McDermott MW,Prados MD,Sloan AE,Bruce JN,Parsa AT

doi

10.1093/neuonc/not203

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

274-9

issue

2

eissn

1522-8517

issn

1523-5866

pii

not203

journal_volume

16

pub_type

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