An improvement in overall survival among patients with metastatic melanoma has been an elusive goal. In this phase 3 study, ipilimumab — which blocks cytotoxic T-lymphocyte–associated antigen 4 to potentiate an antitumor T-cell response — administered with or without a glycoprotein 100 (gp100) peptide vaccine was compared with gp100 alone in patients with previously treated metastatic melanoma.
As serological immunomarkers like neopterin, beta2-microglobulin, soluble IL-2 receptor (sIL-2R) and IL-6 have been described to be elevated in various malignancies, the aim of this study was to investigate whether they would be of diagnostic and prognostic value for leukemic and non-leukemic cutaneous T cell lymphoma (CTCL).Forty-one CTCL patients from the lymphoma clinics of the Department of Dermatology, University of Zurich, were tested for the serum levels of the above-mentioned immunomarkers at several time points, and clinical status and clinical outcome were recorded. Thirty-nine patients with CBCL and T cell inflammatory diseases served as controls.The study revealed that neopterin, beta2-MG and sIL-2R are significantly elevated in Sezary syndrome, whereby sIL-2R seemed to be the most sensitive marker and is typically increased in Sezary syndrome. Moreover, there is a correlation between tumor burden index values and serum parameters. Concerning the outcome of the disease (progression versus non-progression), only neopterin showed a significant prognostic value in non-leukemic CTCL patients.Serological immunomarkers are helpful tools in determining the tumor burden in CTCL and thus might be useful for disease monitoring during treatment. They may have prognostic value for predicting the clinical course.
Knowledge on the real-world characteristics and outcomes of pembrolizumab-treated advanced melanoma patients in Germany and on the value of different real-world endpoints as surrogates for overall survival (OS) is limited. A sample of 664 pembrolizumab-treated patients with advanced melanoma from the German registry ADOReg was used. We examined OS, real-world progression-free survival (rwPFS), real-world time to next treatment (rwTtNT), and real-world time on treatment (rwToT). Spearman's rank and iterative multiple imputation (IMI)-based correlation coefficients were computed between the OS and the rwPFS, rwTtNT, and rwToT and reported for the first line of therapy and the overall sample. The median OS was 30.5 (95%CI 25.0-35.4) months, the rwPFS was 3.9 months (95%CI 3.5-4.9), the rwTtNT was 10.7 months (95%CI 9.0-12.9), and the rwToT was 6.2 months (95%CI 5.1-6.8). The rwTtNT showed the highest correlation with the OS based on the IMI (rIMI = 0.83), Spearman rank correlations (rs = 0.74), followed by the rwToT (rIMI = 0.74 and rs = 0.65) and rwPFS (rIMI = 0.69 and rs = 0.56). The estimates for the outcomes and correlations were similar for the overall sample and those in first-line therapy. The median OS was higher compared to recent real-world studies, supporting the effectiveness of pembrolizumab in regular clinical practice. The rwTtNT may be a valuable OS surrogate, considering the highest correlation was observed with the OS among the investigated real-world endpoints.
<p>Overall survival and distribution after first dose of ipilimumab according to subsequent treatments. Of 209 patients, 71 received at least one additional systemic line of treatment after ipilimumab. 137 individuals did not receive further therapy and data were not available for one patient. 47 (combination model 1) or 67 (combination model 2) of 71 patients had complete data for classification according to biomarker combination models. The representation of PD-1/PD-L1-treated patients in the biomarker groups was shifted towards favorable biomarker combination groups for both combination models compared to those without subsequent PD-1/PD-L1 treatment. Therefore, a confounding effect of subsequent treatment with PD-1/PD-L1 antibodies on the biomarker results of this study cannot be ruled out (A). To investigate the potential confounding impact on OS and biomarker findings, subsequent treatments were categorized into three different groups: BRAF/MEK inhibitors (n=24), PD-1/PD-L1 antibodies (n=28), and chemotherapy/other treatments (n=33) and analyzed by the Kaplan-Meier method (B). Patients treated with PD-1/PD-L1 antibodies had a significant better survival compared to all 71 patients (p=0.006), while no significant difference was observed for the other two groups. Kaplan Meier analysis of overall survival of patients classified according to combination model 1 (C) or combination model 2 (D) is presented after exclusion of individuals who received subsequent treatment with anti-PD-1 or PD-L1 antibodies, as a confounding effect could not be ruled out. However, the prognostic impact of the proposed biomarker combinations at baseline of ipilimumab treatment remained strong (p<0.018 for all pairwise comparisons of categories of the respective model). Censoring is indicated by vertical lines. Programmed cell death protein-1 (PD-1), programmed cell death protein ligand-1 (PD-L1), Risk score (RS).</p>
<p>Spectrum of factors, cut-offs, and differences in overall survival according to biomarkers in the identification and the confirmation cohort. Absolute (Abs.), Relative (Rel.), Lactate dehydrogenase (LDH), regulatory T cells (Tregs), myeloid-derived suppressor cells (MDSCs). * Green characters indicate the category associated with better survival in the identification cohort. ** Green cells indicate significant differences in overall survival (p < 0.05). Red cells indicate non-significant findings.</p>
Leptomeningeal disease (LMD) is a complication of metastasized melanoma, with poor prognosis even in the era of immunotherapy. We present the case of a 37-year-old man who was diagnosed with stage IV melanoma with lymphonodular, splenic and pulmonary metastases. Treatment with dabrafenib and trametinib led to a complete remission, but subsequent symptomatic LMD. Treatment was changed to intrathecal methotrexate, leading to aseptic meningitis, but also a remission of LMD. Followed by ipilimumab monotherapy, a durable, complete remission was observed. Symptomatic LMD may not be amenable to immunotherapy alone, as quick responses may be needed. With little evidence and few retrospective trials demonstrating the challenging treatment of LMD, intrathecal chemotherapy, potentially in combination, may still be considered a viable option.Lay abstract We present the case of a 37-year-old man who was diagnosed with advanced black skin cancer (melanoma) spread to other organ systems including the lung and the spleen. Oral, ‘targeted’ treatment with dabrafenib and trametinib led to the disappearance of all visible signs of cancer. However, the cancer reappeared and tumor cells were found in the cerebrospinal fluid, leading to nerve palsies and other neurological symptoms. This is a complication of advanced melanoma, with usually poor prognosis. The treatment was changed to methotrexate chemotherapy delivered into the cerebrospinal fluid, which lead to another remission. To maintain this cancer-free state, the patient was treated with subsequent intravenous ipilimumab, an immunotherapy supposed to induce an immune response against tumor cells, leading to a durable, cancer-free period of more than 6 years. The patient is still cancer-free to date.
