NKTR-102 Versus Irinotecan in Patients With Second-Line, Irinotecan-Naïve, KRAS Mutant, Colorectal Cancer

A Multicenter, Open-Label, Randomized, Phase 2 Study to Evaluate the Efficacy and Safety of NKTR-102 Versus Irinotecan in Patients With Second-Line, Irinotecan-Naive, KRAS-Mutant, Metastatic Colorectal Cancer (mCRC)

This study will evaluate whether NKTR-102, an investigational drug has an anti-tumor effect in patients with colorectal cancer. This study will also evaluate how the safety and anti-tumor activity of NKTR-102 compares with irinotecan, a cancer drug that is approved for use in the US for treatment of patients with certain types of colorectal cancer.

Study Overview

• Status: Completed
• Conditions: Colorectal Cancer
• Intervention / Treatment: Drug: NKTR-102; Drug: irinotecan

Detailed Description

NKTR-102 (Topoisomerase I Inhibitor Polymer Conjugate) is a polyethylene glycol (PEG) conjugate of irinotecan. Irinotecan is a topoisomerase I inhibitor approved worldwide. In the US, irinotecan is indicated as a component of first-line therapy in combination with 5 fluorouracil (5 FU) and leucovorin for patients with metastatic carcinoma of the colon or rectum. Irinotecan is also indicated for patients with metastatic carcinoma of the colon or rectum whose disease has recurred or progressed following initial fluorouracil-based therapy.

Second-line therapy for colorectal cancer typically involves cetuximab and irinotecan. However, growing evidence indicates that cetuximab (or other EGFR inhibitors) is not appropriate therapy for patients with mutant KRAS. For these patients, irinotecan may be appropriate as a single agent, and a new therapy that could improve upon efficacy and safety would provide an important option for the treatment of advanced colorectal cancer.

• Study Type: Interventional
• Enrollment (Actual): 83
• Phase: Phase 2

Contacts and Locations

Study Locations

• Belgium
  • Antwerp, Belgium, 2020
    • Investigator Site - Antwerp
• Germany
  • Celle, Germany, 29223
    • Investigator Site - Celle
  • Karlsruhe, Germany, 48201
    • Investigator Site - Karlsruhe
• India
  • Andra Pradesh
    • Hyderabad, Andra Pradesh, India, 500004
      • Investigator Site - Hyderabad
  • Gujarat
    • Ahmedabad, Gujarat, India, 380009
      • Investigator Site - Ahmedabad
  • Karnatak
    • Bangalore, Karnatak, India, 560054
      • Investigator Site - Bangalore
    • Bangalore, Karnatak, India, 560078
      • Investigator Site - Bangalore
  • Kerata
    • Kochi, Kerata, India, 682041
      • Investigator Site - Kochi
  • Maharashtra
    • Mumbai, Maharashtra, India, 91-98-50986003
      • Investigator Site - Mumbai
  • West Benagal
    • Kolkata, West Benagal, India, 700026
      • Investigator Site - Kolkata
  • West Bengal
    • Kolkata, West Bengal, India, 700053
      • Investigator Site - Kolkata
• Spain
  • Elche, Spain, 34-966-616250
    • Investigator Site - Elche
  • Madrid, Spain, 28034
    • Investigator Site - Madrid
• United Kingdom
  • Manchester, United Kingdom, MD20 4BX
    • Investigator Site - Manchester
  • Scotland
    • Aberdeen, Scotland, United Kingdom, AB25 2ZN
      • Investigator Site - Aberdeen
• United States
  • Arizona
    • Peoria, Arizona, United States, 85381
      • Investigator Site - Peoria
  • California
    • Burbank, California, United States, 91505
      • Investigator Site - Burbank
    • Los Angeles, California, United States, 90033
      • Investigator Site - Los Angeles
    • Vallejo, California, United States, 94589
      • Investigator Site - Vallejo
  • Illinois
    • Centralia, Illinois, United States, 62801
      • Investigator Site - Centralia
  • Kentucky
    • Louisville, Kentucky, United States, 40202
      • Investigator Site - Louisville
  • Michigan
    • Detroit, Michigan, United States, 48201
      • Investigator Site - Detroit
  • New York
    • Buffalo, New York, United States, 14215
      • Investigator Site - Buffalo
  • Tennessee
    • Knoxville, Tennessee, United States, 37909
      • Investigator Site - Knoxville

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• metastatic colorectal cancer
• tumor with k-ras mutation

Exclusion Criteria:

• More than 1 prior regimen for treatment of metastatic disease

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: NKTR-102; NKTR-102 IV every 3 weeks	Drug: NKTR-102; IV every 3 weeks; Other Names: etirinotecan pegol
Active Comparator: irinotecan; irinotecan IV every 3 weeks	Drug: irinotecan; IV every 3 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Kaplan-Meier Estimate of PFS by Central Radiological Review: ITT Population	PFS was defined as the time from the date of randomisation to the date of disease progression (assessed by central radiological review according to Response Evaluation Criteria in Solid Tumors [RECIST] 1.1) or death due to any cause, whichever comes first. PFS was determined using the intention-to-treat (ITT) population which included all randomized patients who underwent baseline evaluation, with treatment assigned according to randomized arm. For patients whose disease did not progress or who did not die, the PFS time was censored at the time of the last tumor assessment that demonstrated lack of disease progression. For patients who received new anti-cancer therapy, the PFS time was censored at the time of last tumor assessment prior to the new anti-cancer therapy starts.	Every 6 weeks (± 5 days) from Cycle 1, Day 1 until documented disease progression, start of new therapy for cancer, death, or end of study, approximately 42 months.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Kaplan-Meier Estimate of OS: ITT Population	Duration of OS was defined as the time from the date of randomization to the date of death due to any cause. Patients were followed until their date of death, loss to follow-up, withdrawal of consent for further follow-up for survival, or final database closure. Patients who were lost-to-follow-up or were not known to have died were censored at last date they were shown to be alive. Patients who did not have any follow-up since the date of randomization were censored at the date of randomization.	From randomization to death, loss to follow-up, withdrawal of consent for further follow-up for survival, or end of study, approximately 42 months.
ORR by Central Radiological Review: ITT Population	ORR was defined as the proportion of patients with a complete response (CR) or a partial response (PR) per RECIST 1.1 based upon the best response as assessed by central radiological review; confirmation of response was not required. The analyses were performed for patients in the ITT population who had measurable disease as determined by the central imaging facility at baseline.	From randomization of the first subject until documented disease progression, start of new therapy for cancer, death, or end of study approximately 42 months
DoR by Central Radiological Review: ITT Population	Progressive Disease (PD) is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that was the smallest on study); in addition to a relative increase of 20%, the sum must have also demonstrated an absolute increase of at least 5 mm. CR is defined as disappearance of all target lesions; any pathological lymph nodes (whether target or non-target) must have had a reduction in short axis to < 10 mm. PR is defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters	From the time measurement criteria for CR/PR (whichever was first recorded) were first met until the first date that recurrent disease or PD or death was objectively documented, assessed until the end of study approximately 42 months
Percentage of Participants (≥2%) With Treatment-Emergent Adverse Events NCI-CTCAE Grade 3 or Higher	An adverse event (AE) was any untoward medical occurrence in a patient administered a pharmaceutical product which did not necessarily have a causal relationship with the treatment. An AE could have been any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Pre-existing events, which increased in frequency or severity or changed in nature during or as a consequence of use of the study medication were also considered as AEs. All AEs were assessed for severity using the National Cancer Institute - Common Terminology Criteria for Adverse Events (NCI-CTCAE), Version 3.0. If a particular AE was not listed in the NCI CTCAE Version 3.0, the following criteria were used: Grade 3 = severe; Grade 4 = life threatening or disabling; Grade 5 = death.	From the first dose of study medication through the End-of-Treatment visit (30 ± 3 days from last dose of study drug), assessed until the end of study approximately 42 months
PK Parameters of NKTR-102 or Irinotecan and Respective Metabolites	Blood samples for PK analysis were collected from 4 patients only, 3 from the irinotecan treatment arm and 1 from the NKTR-102 treatment arm. NKTR-102, irinotecan, SN38, SN38-G, 7-ethyl-10-[4-N-(5-aminopentanoic acid)-1-piperidino]carbonyloxycamptothecin, and 7-ethyl-10-(4-amino-1-piperidino) carbonyloxycamptothecin concentration levels were determined. However, due to the limited number of patients with PK samples, no further PK analysis was conducted.	Days 1, 2, 3, 4, 8 and 15 of Cycles 1 and 3 and Day 1 of Cycles 2, 4 and all subsequent cycles, until End of Study, approximately 42 months.

Collaborators and Investigators

• Sponsor: Nektar Therapeutics

Study record dates

Study Major Dates

• Study Start: December 1, 2008
• Primary Completion (Actual): July 1, 2014
• Study Completion (Actual): December 1, 2014

Study Registration Dates

• First Submitted: March 3, 2009
• First Submitted That Met QC Criteria: March 4, 2009
• First Posted (Estimate): March 5, 2009

Study Record Updates

• Last Update Posted (Actual): July 12, 2021
• Last Update Submitted That Met QC Criteria: July 9, 2021
• Last Verified: July 1, 2021

More Information

Terms related to this study

• Keywords: colorectal cancer; Colorectal cancer, second line
• Additional Relevant MeSH Terms: Digestive System Diseases; Neoplasms; Neoplasms by Site; Gastrointestinal Neoplasms; Digestive System Neoplasms; Gastrointestinal Diseases; Colonic Diseases; Intestinal Diseases; Intestinal Neoplasms; Rectal Diseases; Colorectal Neoplasms; Molecular Mechanisms of Pharmacological Action; Enzyme Inhibitors; Antineoplastic Agents; Topoisomerase II Inhibitors; Topoisomerase Inhibitors; Topoisomerase I Inhibitors; Irinotecan; Etirinotecan pegol
• Other Study ID Numbers: 08-PIR-03