Efficacy And Safety Of Xeliri + Avastin Followed By Xelox + Avastin Or Reverse Sequence In Metastatic Colorectal Cancer

Summary

Since its introduction, 5-fluorouracil (5-FU) has been the cornerstone of treatment for metastatic colorectal cancer (mCRC). Meanwhile the oral 5FU pro-drug Capecitabine (Xeloda®) proved equivalence to 5-FU and is a well tolerated alternative combination partner for Irinotecan (XELIRI) or Oxaliplatin (XELOX) which are widely used for first line treatment of mCRC. Recent advances in molecular biology have resulted in the development of an inhibitor of the vascular endothelial growth factor (VEGF) by the monoclonal humanized antibody bevacizumab (Avastin®).

XELOX or XELIRI +bevacizumab have been investigated in several trials, but not in an approach with clearly defined cross-wise XELIRI-XELOX change criteria. This trial investigates two different sequential treatment options with XELIRI/ XELOX in first and second line with the addition of bevacizumab and tries to give answer to the question if there is an optimal sequence for the benefit of the patient.

This is a prospective, randomized, open-label, 2-arm pilot trial in patients with mCRC who did not receive systemic treatment for their metastatic disease. The study is designed to evaluate the efficacy of XELIRI followed by XELOX and XELOX followed by XELIRI + bevacizumab in terms of Duration of Disease Control (DDC).

Patients will be treated with an established first line therapy consisting of either XELOX or XELIRI + bevacizumab. The chemotherapy treatment will be given for 6 months except prior disease progression, unacceptable toxicity or patient refusal. Bevacizumab will be given until disease progression, unacceptable toxicity or patient refusal.

Capecitabine can be given in addition at the investigators' discretion until disease progression, unacceptable toxicity or patient refusal.

If serious side effects occur despite adequate dose reduction, Oxaliplatin or Irinotecan should be discontinued. In case of Oxaliplatin or Irinotecan-related discontinuation Capecitabine and Bevacizumab should be continued. If Capecitabine also has to be discontinued in first line treatment bevacizumab should be continued. In case of permanent discontinuation of bevacizumab for toxicities, chemotherapy should be continued.

Upon completion of first line chemotherapy patients with disease control will receive bevacizumab maintenance treatment. On investigators decision patients can receive Capecitabine as additional maintenance treatment.

The primary endpoint is to determine the efficacy of a modified XELIRI + bevacizumab followed by XELOX + bevacizumab scheme at progression in comparison with the reverse sequence based on DDC.

Secondary endpoints are first line progression-free survival (PFS), second line PFS, overall response rate, time to response, duration of response, overall survival, tumor assessments (based on RECIST criteria) using CT scans, MRI scans, X-ray, bone scan, clinical examination.

Conditions

• Metastatic Colorectal Cancer

Interventions

DRUG

Capecitabine

800mg/m2 bid d1-14 ± 1000 mg/m2 bid,days 1-14 q3w: maintenance

DRUG

Capecitabine

1000mg/m2 bid d1-14,

DRUG

Bevacizumab

7,5 mg/kg given on d1 q3w

DRUG

Oxaliplatin

130mg/m2 iv. d 1 q3w

DRUG

Irinotecan

200mg/m2 iv. d 1 q3w .

Sponsors & Collaborators

• Prof. Dr. Werner Scheithauer

  lead OTHER

Principal Investigators

• Werner Scheithauer, Prof. Dr. · Medical University of Vienna

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2011-02-28

Primary Completion

2017-08-31

Completion

2017-08-31

Countries

• Austria

Study Locations