Re-challenge Therapy With Chemotherapy & Panitumumab in Metastatic Colorectal Cancer Patients Treated With an Anti-EGFR (REPAN)

  • STATUS
    Recruiting
  • participants needed
    30
  • sponsor
    King Abdullah Medical City
Updated on 13 August 2022
measurable disease
KRAS
oxaliplatin
neutrophil count
metastatic adenocarcinoma
panitumumab
fluoropyrimidine
EGFR
irinotecan
bevacizumab
chemotherapy regimen
cetuximab
adenocarcinoma
adenocarcinoma of colon

Summary

patients with metastatic colorectal cancer who were initially RAS wild and failed at least 2 lines of chemotherapy will be enrolled. Anti-EGFR must have been given in 1st line. Those who remain RAS-wild upon retesting will receive rechallenge with panitumumab and chemotherapy

Description

This is a single arm pilot multicenter prospective study. We will recruit KRAS/RAS wild metastatic colorectal cancer patients who received at least 2 lines of chemotherapy and the 1st line must include cetuximab/panitumumab combined with chemotherapy. We will repeat RAS testing after progression on the last line of therapy. RAS testing will be taken via liquid biopsy using ctDNA or tissue biopsy from either a new tumour lesion or a previously present lesion which shows evidence of disease progression by radiological imaging. Only RAS-wild patients upon re-testing will be enrolled and will receive re-challenge therapy with panitumumab combined with chemotherapy similar to that given at 1st line (5-fluorouracil/leucoverin combined with oxaliplatin or irinotecan). Those converted to RAS mutant will not be enrolled.

All patients will be treated until disease progression, unacceptable toxic effects or withdrawal of consent.

Details
Condition Metastatic Colorectal Cancer
Treatment Panitumumab
Clinical Study IdentifierNCT03940131
SponsorKing Abdullah Medical City
Last Modified on13 August 2022

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