Gemcitabine in Combination With Pemetrexed Long Term Infusion in the Treatment of Pretreated Metastatic Colorectal Cancer Patients

Colorectal Cancer Metastatic Clinical Trial

Official title: A Phase II Study to Evaluate Activity and Toxicity of Gemcitabine in Combination With Pemetrexed Long Term Infusion in the Treatment of Pretreated Metastatic Colorectal Cancer Patients

Status Completed

Clinical Trial Summary

Study Design:

Multicenter, non randomized, open label phase II study designed to evaluate the efficacy and safety of Gemcitabine/Pemetrexed combination.

Enrollment period: 18 months. Treatment period: maximum for 24 weeks for each patient (12 cycles lasting 2 weeks).

Total duration of the study: 24 months.

Number of Subjects:

Approximately 38 subjects will be enrolled on study:

• First stage:12 patients enrolled

If 1 or 0 responses were observed, the trial had to be terminated:

• Second stage: an additional of 23 patients were to be enrolled. If 5 or less responses were observed in 35 patients, the combination would not be considered worthy of further study, while if 6 or more responses were observed, the combination would be considered sufficiently active to warrant further testing. Taking into account an invalidity rate of 5%, 38 patients will be needed for this step.

Clinical Trial Description

A Phase II Study to evaluate activity and toxicity of Gemcitabine in Combination with Pemetrexed long term infusion in the Treatment of pretreated Metastatic Colorectal Cancer Patients

Study Design:

Multicenter, non randomized, open label phase II study designed to evaluate the efficacy and safety of Gemcitabine/Pemetrexed combination.

Study Duration

Enrollment period: 18 months. Treatment period: maximum for 24 weeks for each patient (12 cycles lasting 2 weeks).

Total duration of the study: 24 months.

Primary objective:

• objective response rate (ORR: CR+PR+SD)

Secondary objectives:

• safety profile of the drugs combination;

• time to progression (TTP) and overall survival (OS)

Number of Subjects:

Approximately 38 subjects will be enrolled on study:

• First stage:12 patients enrolled

If 1 or 0 responses were observed, the trial had to be terminated:

• Second stage: an additional of 23 patients were to be enrolled. If 5 or less responses were observed in 35 patients, the combination would not be considered worthy of further study, while if 6 or more responses were observed, the combination would be considered sufficiently active to warrant further testing. Taking into account an invalidity rate of 5%, 38 patients will be needed for this step.

Statistical Methodology:

A minimax two-stage Simon design will be employed. A 10% response will preclude further study, whereas a 30% response rate will indicate that further study would be warranted. Using α and β errors of 0.10 and 0.10, respectively, 12 patients will be enrolled in the first stage, and if 1 or 0 responses were observed, the trial had to be terminated. Otherwise, an additional of 23 patients were to be enrolled, and if 5 or less responses were observed in 35 patients, the combination would not be considered worthy of further study, while if 6 or more responses were observed, the combination would be considered sufficiently active to warrant further testing. Taking into account an invalidity rate of 5%, 38 patients will be needed for this step.

The first 6 enrolled patients will be closely controlled for safety and further patients will be enrolled only in absence of severe toxicity resulting in discontinuation 1 month after the first cycle of the six patients.

The primary analysis will be performed on the ITT (Intention To Treat) population. PFS and OS will be estimated by the Kaplan-Meier method. The HR for PFS and OS will be estimated according to the Cox model, with its relative 95% confidence.

A secondary analysis will be performed on the PP (per-protocol) population. The Overall Response Rate to study treatment will be reported on the ITT and PP population with 95% confidence interval. Results will be tabulated and not evaluable patients will be included as additional category. ;

Study Design

Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Colorectal Cancer Metastatic
• Colorectal Neoplasms
• Neoplasms

• NCT number: NCT01909830
• Study type: Interventional
• Source: Istituto Scientifico Romagnolo per lo Studio e la cura dei Tumori
• Status: Completed
• Phase: Phase 2
• Start date: July 2012
• Completion date: March 2014