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Clinical Trial, Phase I
Journal Article
Phase I trial of Lipovaxin-MM, a novel dendritic cell-targeted liposomal vaccine for malignant melanoma.
Cancer Immunology, Immunotherapy : CII 2018 September
INTRODUCTION: In this phase I study using a 3 + 3 dose escalation design, the safety, dose-limiting toxicity (DLT), immunogenicity and efficacy of intravenous Lipovaxin-MM-a multi-component dendritic cell-targeted liposomal vaccine against metastatic melanoma-was investigated.
METHODS: Twelve subjects with metastatic cutaneous melanoma were recruited in three cohorts. Patients in Cohort A (n = 3) and Cohort B (n = 3) received three doses of 0.1 and 1 mL of Lipovaxin-MM, respectively, every 4 weeks. Patients in Cohort C (n = 6) received four doses of 3 mL vaccine weekly. Immunologic assessments of peripheral blood were made at regular intervals and included leukocyte subsets, cytokine levels, and Lipovaxin-MM-specific T-cell and antibody reactivities. Tumor responses were assessed by RECIST v1.0 at screening, then 8 weekly in Cohorts A and B and 6 weekly in Cohort C.
RESULTS: Of a total of 94 adverse events (AEs) reported in ten subjects, 43 AEs in six subjects were considered to be possibly or probably vaccine-related. Most (95%) vaccine-related AEs were grade 1 or 2, two (5%) grade 3 vaccine-related AEs of anemia and lethargy were recorded, and higher grade AEs and DLTs were not observed. No consistent evidence of vaccine-specific humoral or cellular immune responses was found in post-immunization blood samples. One patient had a partial response, two patients had stable disease, and the remaining patients had progressive disease.
CONCLUSIONS: Lipovaxin-MM was well tolerated and without clinically significant toxicity. Immunogenicity of Lipovaxin-MM was not detected. Partial response and stable disease were observed in one and two patients, respectively.
METHODS: Twelve subjects with metastatic cutaneous melanoma were recruited in three cohorts. Patients in Cohort A (n = 3) and Cohort B (n = 3) received three doses of 0.1 and 1 mL of Lipovaxin-MM, respectively, every 4 weeks. Patients in Cohort C (n = 6) received four doses of 3 mL vaccine weekly. Immunologic assessments of peripheral blood were made at regular intervals and included leukocyte subsets, cytokine levels, and Lipovaxin-MM-specific T-cell and antibody reactivities. Tumor responses were assessed by RECIST v1.0 at screening, then 8 weekly in Cohorts A and B and 6 weekly in Cohort C.
RESULTS: Of a total of 94 adverse events (AEs) reported in ten subjects, 43 AEs in six subjects were considered to be possibly or probably vaccine-related. Most (95%) vaccine-related AEs were grade 1 or 2, two (5%) grade 3 vaccine-related AEs of anemia and lethargy were recorded, and higher grade AEs and DLTs were not observed. No consistent evidence of vaccine-specific humoral or cellular immune responses was found in post-immunization blood samples. One patient had a partial response, two patients had stable disease, and the remaining patients had progressive disease.
CONCLUSIONS: Lipovaxin-MM was well tolerated and without clinically significant toxicity. Immunogenicity of Lipovaxin-MM was not detected. Partial response and stable disease were observed in one and two patients, respectively.
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