Study of Therapeutic Targets Tailored Ch and IMRT as Neoadjuvant Treatment in Rectal Carcinoma Patients (TT)
The parameter that best correlates with 5 years disease-free survival (DFS ) in patients (pts) with localized rectal cancer (RC) is the pathological TNM staging (ypTNM) after chemo-radiotherapy (Ch-RT). DFS is 97% in pts with ypT0N0M0 = ypCR and 42% in pts with ypN +. Standard 5-FU Ch-RT achieves 15% of ypCR. The use of IMRT achieves a high proportion of ypCR . This study aimed to demonstrate in a prospective manner the feasibility of personalizing Ch regimen base in TT in combination with IMRT in patients with RC. Secondary objectives included the number of ypCR and safety.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Prospective Pilot Study of Therapeutic Targets (TT) Tailored Chemotherapy (Ch) and Intensity Modulated Radiotherapy (IMRT) as Neoadjuvant Treatment in Patients With Rectal Carcinoma|
- ypTN [ Time Frame: Up to 1 month ] [ Designated as safety issue: No ]pathology TN after neoadjuvant treatment and surgery
- Feasibility [ Time Frame: Up to 3 months ] [ Designated as safety issue: No ]Days needed to full set of TT analys. Days from signed informed consent to first day of Ch-RT treatment Number of patinets who complet the Ch-RT treatment and go to surgery as planned.
|Study Start Date:||October 2009|
|Study Completion Date:||April 2011|
|Primary Completion Date:||April 2011 (Final data collection date for primary outcome measure)|
|Experimental: TT tailored Ch plus IMRT||
Drug: Therapeutic target tailored chemotherapy
All pts were treated with Capecitabine (Cap) 625-825 mg/m2/12h M-F.
Ch combination schema was customized based on:
Top- 1 +: Irinotecan (I) 50mg/m2 / in weekly. Top-1 - and ERCC-1 - : Oxaliplatin (O) 50gm/m2/ weekly. Top- 1 - and ERCC-1 + : Neither I nor O. K-Ras or b-Raf mutated (m) : Bevacizumab (B) 5mg/kg every two weeks. K-Ras and B-Raf native (n): Cetuximab (C) 400/250mg/m2 weekly or B (investigator option). Figure 1.
When Cap was in combination with O or I the 625mg/m2 dose was chosen. When Cap was the only chemotherapy agent in combination with B or C the 825mg/m2 dose was chosen
The parameter that best correlates with DFS in patients (pts) with localized rectal cancer (RC) is the pathological TNM staging (ypTNM) after chemo-radiotherapy (Ch-RT).Tumor regression grading (TRG) after Ch-RT has been correlated with DFS , 86% for TRG 4, 75% for grouped TRG 2 + 3, and 63% for grouped TRG 0 + 1 but this is not as good as ypTNM to predict pts outcome.
Standard 5-FU or capecitabine Ch-RT achieves 15% of ypCR with diarrhea and proctitis as the main grade 3 toxicities in the range of 10-15% . With the combination of oxaliplatin and capecitabine pCR rates are the same but the toxicity is the range of 25%. IMRT studies reported 30% ypCR but with 30-40% grade 3 toxicities Last years strategies have explored ways to integrate additional chemotherapeutic agents as capecitabine , oxaliplatin, irinotecan, bevacizumab and cetuximab in Ch-RT regimens and to find biomarkers of their effectiveness , but always in a retrospective way.
Our hypothesis is that with the actual knowledge and technology, a prospective tailored chemotherapy selection in combination with IMRT is feasible and could improve the outcome of patients with rectal cancer.
|Centro Integral Oncológico Clara Campal|
|Madrid, Spain, 28050|
|Principal Investigator:||Antonio Cubillo, MD.PhD||Centro Integral Oncológico Clara Campal|