Abstract
Background
Talimogene laherparepvec (T-VEC) is a genetically modified herpes simplex type 1 virus and known as an effective oncolytic immunotherapy for injectable cutaneous, subcutaneous and nodal melanoma lesions in stage IIIB-IVM1a patients. This study set out to identify prognostic factors for achieving a complete response that can be used to optimize patient selection for T-VEC monotherapy.
Methods
Patients with stage IIIB-IVM1a melanoma, treated with T-VEC at the Netherlands Cancer Institute between 2016–12 and 2020–01 with a follow-up time > 6 months, were included. Data were collected on baseline characteristics, responses and adverse events (AEs). Uni- and multivariable analyses were conducted, and a prediction model was developed to identify prognostic factors associated with CR.
Results
A total of 93 patients were included with a median age of 69 years, median follow-up time was 16.6 months. As best response, 58 patients (62%) had a CR, and the overall response rate was 79%. The durable response rate (objective response lasting > 6 months) was 51%. Grade 1–2 AEs occurred in almost every patient. Tumor size, type of metastases, prior treatment with systemic therapy and stage (8Th AJCC) were independent prognostic factors for achieving CR. The prediction model includes the predictors tumor size, type of metastases and number of lesions.
Conclusions
This study shows that intralesional T-VEC monotherapy is able to achieve high complete and durable responses. The prediction model shows that use of T-VEC in patients with less tumor burden is associated with better outcomes, suggesting use earlier in the course of the disease.
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Data availability
Data and material presented in this study are available on request.
Abbreviations
- AE:
-
Adverse event
- AUC:
-
Area under the curve
- AJCC:
-
American Joint Committee on Cancer
- CR:
-
:Complete response
- DRR:
-
Durable response rate
- EMA:
-
European Medicines Agency
- FDA:
-
Food and Drug Administration
- HSV-1:
-
Herpes simplex type 1 virus
- LDH:
-
Lactate dehydrogenase
- ORR:
-
Overall response rate
- OS:
-
Overall survival
- PR:
-
Partial response
- PFU:
-
Plaque-forming units
- PET/CT:
-
Positron emission tomography/computed tomography
- PD:
-
Progressive disease
- PFS:
-
Progression-free survival
- RFS:
-
Relapse-free survival
- ROC:
-
Receiver operating characteristic
- T-VEC:
-
Talimogene laherparepvec
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Conceptualization: ES, AvA; Methodology: ES, AvA; Formal analysis and investigation: ES; Writing—original draft preparation: ES; Writing—review and editing: ES, VF, CZ, WK, BvdH, BvdW, MW, YS, WvH; Funding acquisition: AvA; Resources: ES, VF, CZ, WK, BvdH, BvdW, MW, YS, WvH; Supervision: AvA.
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Winan van Houdt declares advisory board/consultancy agreement and research grant received from Amgen. Michel Wouters declares a research grant received from Novartis. Alexander van Akkooi declares advisory board/consultancy agreements for Bristol-Myers Squibb, Novartis, MSD – Merck, Merck – Pfizer, 4SC and Amgen and a research grant received from Bristol-Myers Squibb, Novartis and Amgen. All other others have no relevant financial or non-financial interests to disclose.
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No identifiable patient information has been published warranting individual consent from patients. The requirement for individual patient informed consent for the purpose of data collection and publication was waived as per the regulations covered under the respective institutional IRBs.
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The study was performed with the approval of the Institutional Review Board (IRB) Netherlands Cancer Institute – Antoni van Leeuwenhoek and in accordance with the declaration of Helskini.
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Stahlie, E.H.A., Franke, V., Zuur, C.L. et al. T-VEC for stage IIIB-IVM1a melanoma achieves high rates of complete and durable responses and is associated with tumor load: a clinical prediction model. Cancer Immunol Immunother 70, 2291–2300 (2021). https://doi.org/10.1007/s00262-020-02839-7
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DOI: https://doi.org/10.1007/s00262-020-02839-7