Safety, immune and clinical responses in metastatic melanoma patients vaccinated with a long peptide derived from indoleamine 2,3-dioxygenase in combination with ipilimumab
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Safety, immune and clinical responses in metastatic melanoma patients vaccinated with a long peptide derived from indoleamine 2,3-dioxygenase in combination with ipilimumab. / Bjørn, Jon; Iversen, Trine Zeeberg; Nitschke, Nikolaj Juul; Andersen, Mads Hald; Svane, Inge Marie.
In: Cytotherapy, Vol. 18, No. 8, 08.2016, p. 1043-1055.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Safety, immune and clinical responses in metastatic melanoma patients vaccinated with a long peptide derived from indoleamine 2,3-dioxygenase in combination with ipilimumab
AU - Bjørn, Jon
AU - Iversen, Trine Zeeberg
AU - Nitschke, Nikolaj Juul
AU - Andersen, Mads Hald
AU - Svane, Inge Marie
N1 - Copyright © 2016 International Society for Cellular Therapy. Published by Elsevier Inc. All rights reserved.
PY - 2016/8
Y1 - 2016/8
N2 - BACKGROUND AIM: Indoleamine 2,3-dioxygenase (IDO) is an emerging new target in cancer therapy that can be targeted with active immunotherapy (e.g. through peptide vaccination). Furthermore, IDO has been identified as a key mechanism underlying resistance to treatment with the checkpoint blocking antibody ipilimumab (ipi).METHODS: Ten patients with metastatic melanoma participated in a phase I first-in-human clinical study assessing safety of combining ipi with a 21-mer synthetic peptide vaccine from IDO denoted IDOlong. Secondary and tertiary end points included vaccine and clinical response.RESULTS: Treatment was generally safe and well tolerated. Vaccine related adverse reactions included grade I and II erythema, oedema and pruritus at the vaccination site, which were manageable with mild topical corticosteroids. One patient developed presumed ipi-induced colitis. It initially responded to high-dose parenteral corticosteroids but later relapsed while the patient was admitted to a local hospital, where he died after receiving suboptimal therapy. Vaccine-specific T-cell responses were detectable ex vivo in three patients. At first evaluation, five of the 10 treated patients were in stable disease, one of whom had an unconfirmed partial response.CONCLUSIONS: Treatment with IDOlong synthetic peptide vaccine in combination with ipi was generally safe and without augmented toxicity. The vaccine induced readily detectable T-cell responses in a subset of patients. Treatment showed signs of clinical activity, although not exceeding efficacy of ipi alone. Results should be confirmed in a larger study.
AB - BACKGROUND AIM: Indoleamine 2,3-dioxygenase (IDO) is an emerging new target in cancer therapy that can be targeted with active immunotherapy (e.g. through peptide vaccination). Furthermore, IDO has been identified as a key mechanism underlying resistance to treatment with the checkpoint blocking antibody ipilimumab (ipi).METHODS: Ten patients with metastatic melanoma participated in a phase I first-in-human clinical study assessing safety of combining ipi with a 21-mer synthetic peptide vaccine from IDO denoted IDOlong. Secondary and tertiary end points included vaccine and clinical response.RESULTS: Treatment was generally safe and well tolerated. Vaccine related adverse reactions included grade I and II erythema, oedema and pruritus at the vaccination site, which were manageable with mild topical corticosteroids. One patient developed presumed ipi-induced colitis. It initially responded to high-dose parenteral corticosteroids but later relapsed while the patient was admitted to a local hospital, where he died after receiving suboptimal therapy. Vaccine-specific T-cell responses were detectable ex vivo in three patients. At first evaluation, five of the 10 treated patients were in stable disease, one of whom had an unconfirmed partial response.CONCLUSIONS: Treatment with IDOlong synthetic peptide vaccine in combination with ipi was generally safe and without augmented toxicity. The vaccine induced readily detectable T-cell responses in a subset of patients. Treatment showed signs of clinical activity, although not exceeding efficacy of ipi alone. Results should be confirmed in a larger study.
KW - Journal Article
U2 - 10.1016/j.jcyt.2016.05.010
DO - 10.1016/j.jcyt.2016.05.010
M3 - Journal article
C2 - 27378345
VL - 18
SP - 1043
EP - 1055
JO - Cytotherapy
JF - Cytotherapy
SN - 1465-3249
IS - 8
ER -
ID: 176366668