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To assess the tolerability and safety of increasing multiple doses administration of PDM08: 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks in patients with advanced solid tumours for which there is no standard therapy or the patient is refractory to it.

To assess the tolerability and safety of increasing multiple doses administration of PDM08: 560 μg, 1.12, 2.24, 3.5, 14, 28 and 56 mg administered twice a week for four weeks in patients with advanced solid tumours for which there is no standard therapy or they are refractory to it.

PDM08

Jorge Barriuso, MD, PhD

This phase I study in adult patients with advanced solid tumours is designed to evaluate toxicity, drug exposure (pharmacokinetics) and drug action (pharmacodynamics) of a new molecule, PDM08, administered twice a week cycles of 4 weeks. This drug has shown antitumoral activity in several murine cancer models.

Phase I study, open, dose escalation, in adult patients with advanced solid tumours, to evaluate tolerability, pharmacokinetics and pharmacodynamics of ascending PDM08 doses administered twice a week cycles of 4 weeks.

After checking the safety of the first drug doses, a new dose escalation was proposed and approved by the Ethic Committee and the Medicines Agency.

This clinical trial is carried out in adult patients with advanced solid tumours whose disease has progressed despite standard therapy, or for which there is no standard antineoplastic therapy, or are refractory to it.

In pharmacodynamic non clinical studies, PDM08 presented antitumour activity against different tumour models including, renal, colon, lung, prostate and breast cancer models.

PDM08 Clinical Trial in Advanced Solid Tumors

Phase I Study, Open, Dose Escalation, in Adult Patients With Advanced Solid Tumours, to Evaluate Tolerability, Pharmacokinetics and Pharmacodynamics of PDM08 Administered Twice a Week Cycles of 4 Weeks.

Drug safety will be measured by the number and grade of adverse events, by participant, related to the drug in study (PDM08) in the cohorts studied: 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks.

The drug will be administered twice a week for four weeks.

Safety and tolerability will be measured considering the adverse events occurred, by participant, related with the drug in study, PDM08, at each cohort.

Drug tolerability will be assessed by determining the DLT. It will be determined for each cohort (increasing multiple doses of PDM08): 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks). Dose Limiting Toxicity will be considered the dose that produces adverse events of a severity grade 3 or greater, related to the drug in study (PDM08) in the classification specified in the list of Toxicity Criteria of the National Cancer Institute (CTCAE v04.03).

Blood sampling collected on Day 1 and 25 of each cohort cycle.Cohorts (doses): 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks.

Blood collection scheme: - Dose of 560 μg and 1.12 mg: 0,0.25, 1, 2, 4, 8, 12 hours post-dose, on day 1 and day 25 of each cycle. - Doses of 2.24 mg, 3.5 mg, 14 mg, 28 mg, and 56 mg: 0,0.25, 1, 2, 4, 8, 12, 16 and 24 hours post-dose, on day 1 and day 25 of each cycle.

Pharmacokinetic parameters will be expressed as mean ± standard deviation and confidence interval 95%. Linearity will be analyzed.

Blood sampling will be collected on Day 1 and Day 25 of each cohort cycle.Cohorts(doses): 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks.

Blood collection scheme:

* Dose of 560 μg and 1.12 mg: 0,0.25, 1, 2, 4, 8, 12 hours post-dose, on day 1 and day 25 of each cycle.
* Dose of 3.5 mg and 14 mg, 28 mg and 56 mg: 0,0.25, 1, 2, 4, 8, 12, 16 and 24 hours post-dose, on day 1 and day 25 of each cycle.

Pharmacokinetic parameters will be expressed as mean ± standard deviation and confidence interval 95%. Linearity will be analyzed.

Blood sampling will be collected on Day 1 and Day 25 of each cohort cycle.Cohorts(dose): 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks.

Blood collection scheme:

* Dose of 1.12 mg and 2.24 mg: 0,0.25, 1, 2, 4, 8, 12 hours post-dose, on day 1 and day 25 of each cycle.
* Dose of 2.24 mg; 3.5 mg and 14 mg, 28 mg and 56 mg: 0,0.25, 1, 2, 4, 8, 12, 16 and 24 hours post-dose, on day 1 and day 25 of each cycle.

Pharmacokinetic parameters will be expressed as mean ± standard deviation and confidence interval 95%. Linearity will be analyzed.

Blood sampling will be collected on Day 1 and Day 25 of each cohort cycle.Cohorts(dose): 560 μg, 1.12 mg, 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg administered twice a week for four weeks.

Blood collection scheme:

* Dose of 560 μg and 1.12 mg: 0,0.25, 1, 2, 4, 8, 12 hours post-dose, on day 1 and day 25 of each cycle.
* Dose of 2.24 mg, 3.5 mg and 14 mg, 28 mg and 56 mg: 0,0.25, 1, 2, 4, 8, 12, 16 and 24 hours post-dose, on day 1 and day 25 of each cycle.

Pharmacokinetic parameters will be expressed as mean ± standard deviation and confidence interval 95%. Linearity will be analyzed.

Changes in tumour size will be measured by CT (RECIST criteria v.1.1) at each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

Pharmacodynamic parameters will be tabulated as raw values and sorted by dose. Statistical analysis will be performed using ANOVA with repeated measures, including baseline values as cofactor.

Changes in tumour activity will be measured by PET in each cohort on days 1, 4 11, 25, 29 and 43 of the study.

Pharmacodynamic parameters will be tabulated as raw values and sorted by dose. Statistical analysis will be performed using ANOVA with repeated measures, including baseline values as cofactor.

Myeloid cells in peripheral blood (total myeloid cells, monocyte-macrophage series, granulocytes and myeloid suppressor in peripheral blood) will be measured in each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

In order to determine the function of these populations the exresion of membrane markers will be analyze; and membrane markers displayed in relation to the degree of activation of lymphocytes. These parameters will be measured at each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

Serum Immunoglobulins and subtypes (IgG1, IgG2, IgG3, IgG4, IgM, IgA) will be measured at each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

C3 and C4 components of the complement system, CRP, and the total activity of the classical complement pathway. measured as haemolytic capacity CH50,will be measured in serum of all the participants at each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

Serum cytokines that will be measured will be:IL1α, IL1β, IL2, IL4, IL5, IL6, IL7, IL10, IL12, IL17, TNFα, IFNγ, G-CSF, GM-CSF, VEGF. Serum cytokines will be measured in serum at each cohort on days 1, 4, 11, 25, 29 and 43 of the study.

Spots Global Cancer Trial Database for phase i multiple doses