5-fluorouracil Plus Panitumumab (Anti-EGFR) and Sotorasib (KRAS G12C Inhibitor) in First-line Treatment of Patients Non-eligible for a Doublet/Triplet Chemotherapy With Advanced Unresectab

NCT ID: NCT07124884

Last Updated: 2025-08-15

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE2

Total Enrollment

300 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-08-31

Study Completion Date

2030-12-30

Brief Summary

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5-fluorouracil (5-FU) is a standard of care in frail/elderly patients with an unresectable colorectal adenocarcinoma (CRC) in first-line setting. Panitumumab plus Sotorasib are promising in advanced line in KRAS G12C mutated CRC. In this study, We assess the safety and efficacy of 5FU combination with Panitumumab and Sotorasib as first-line treatment in frail/elderly patients with unresectable KRAS G12C mutated CRC

Detailed Description

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COLOSOTO is a multicenter, open-label, prospective single-arm phase II trial, sponsored and cordinated by the Fédération Francophone de Cancérologie Digestive (FFCD) in collaboration with the ENGIC group (European Network in GastroIntestinal Cancer), evaluating 5-FU plus Panitumumab and Sotorasib as first line treatment in patients with MSS/pMMR KRAS G12C mutated unresectable CRC. Inclusion will begin in September 2025, for 36 months. Overall, patients from 40 European sites will be included (in France, Germany, Italy and Spain).

The main inclusion and exclusion criteria are summarized in Table 1. Main inclusion criteria are patients ≥18 years old, with unresectable MSS/pMMR KRASG12C metastatic CRC histologically proven, with altered WHO Performance Status...

Eligible patients will receive LV5FU2 (a 400mg/m2 intravenous (IV) bolus of 5-FU at day 1 (D1) with 400mg/m2 of folinic acid, followed by a continuous 5-FU infusion of 2400mg/m2 over 46 hours) plus Panitumumab (6mg/kg IV at D1) and Sotorasib (960mg PO once daily, every day) in 2-week-cycles (Q2W) until progression or intolerance (cf Figure 1).

Adverse events requiring dose adjustment or treatment discontinuation will all be assessed using the NCI-CTCAE v5.0 scale and manage in accordance with the standard guidelines and the "Summaries of Product Characteristics".

The primary objective is to evaluate the progression-free survival (PFS) of 5FU plus Panitumumab and Sotorasib at 8 months in first-line treatment of patients non-eligible for a doublet/triplet chemotherapy with advanced unresectable KRAS G12C mutated CRC. The progression will be defined as the radiological progression according to RECIST v1.1 criteria assessed by the investigator. A centralized review of CT-scans will be performed to confirm RECIST 1.1 criteria.

Secondary objectives include median progression-free survival (mPFS), disease control rate (DCR), time to progression (TTP), overall survival (OS), best objective response rate (ORR), duration of response (DoR), safety profile, Quality of life (QoL) (with EORTC QLQC30 and FACIT-GP5 questionnaires), and Geriatric assessment (based on G8 score and " Geriatric COre Data sEt " (G-CODE)).

Toxicity will all be evaluated according to the National cancer Institute - Common Terminology Criteria for Adverse Events (NCI-CTCAE v4.0) scale. A safety analysis will be done when 10 patients have been treated for at least 2 months to check the good tolerability of 5-FU plus Panitumumab and Sotorasib combination

Conditions

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Colorectal Carcinoma KRAS G12C Mutation Unresectable Colorectal Cancer

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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5-fluorouracil plus Panitumumab and Sotorasib

Each patient receives one treatment cycle every two weeks until disease progression or unacceptable toxicity. Panitumumab is administered at a dose of 6 mg/kg via intravenous infusion over one hour during the first cycle, and over 30 minutes from the second cycle onward. The LV5FU2 regimen includes folinic acid (400 mg/m², or 200 mg/m² if levo-leucovorin is used) as a two-hour IV infusion, followed by a 5-FU bolus (400 mg/m² over 10 minutes), and a continuous 5-FU infusion (2400 mg/m² over 46 hours). Sotorasib is given orally at a dose of 960 mg once daily on a continuous basis.

Group Type EXPERIMENTAL

Administration of experimental treatment association (sotorasib, panitumumab 5FU)

Intervention Type DRUG

Panitumumab is administered at a dose of 6 mg/kg via intravenous infusion over one hour during the first cycle, and over 30 minutes from the second cycle onward. The LV5FU2 regimen includes folinic acid (400 mg/m², or 200 mg/m² if levo-leucovorin is used) as a two-hour IV infusion, followed by a 5-FU bolus (400 mg/m² over 10 minutes), and a continuous 5-FU infusion (2400 mg/m² over 46 hours). Sotorasib is given orally at a dose of 960 mg once daily on a continuous basis.

Interventions

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Administration of experimental treatment association (sotorasib, panitumumab 5FU)

Panitumumab is administered at a dose of 6 mg/kg via intravenous infusion over one hour during the first cycle, and over 30 minutes from the second cycle onward. The LV5FU2 regimen includes folinic acid (400 mg/m², or 200 mg/m² if levo-leucovorin is used) as a two-hour IV infusion, followed by a 5-FU bolus (400 mg/m² over 10 minutes), and a continuous 5-FU infusion (2400 mg/m² over 46 hours). Sotorasib is given orally at a dose of 960 mg once daily on a continuous basis.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Age ≥ 18 years.
* Histologically proven advanced-stage unresectable locally advanced or metastatic colorectal adenocarcinoma.
* Proven KRAS G12C mutation as locally assessed by means of an IVDR-compliant test
* Agreement to participate to biological studies (blood samples for ctDNA and send tumour block).
* Patient with one these criteria:

Patient with WHO PS=2 Patient between 70 and 75 years old with WHO PS 1 Patient ≥ 75 years old

* Measurable lesion according to the Response Evaluation Criteria in Solid Tumours 1.1 (RECIST 1.1).
* No prior treatment for the metastatic disease. Prior adjuvant chemotherapy is allowed if there is more than 6 months between the end of adjuvant treatment and relapse.
* Adequate organ function: Hemoglobin \> 9 g/dl, Absolute neutrophil count \> 1500 /mm3, Platelets \> 80 000/mm3, Creatinine clearance rate ≥50 mL/min as calculated using MDRD formula, ALT/AST ≤5×ULN and total bilirubin ≤1.5×ULN.
* Ability to understand and sign written informed consent to participate in the study.
* Provides written informed consent for the study.
* Life expectancy \>6 months.
* Women of childbearing potential must agree to use contraception during the trial treatment and for at least 6 months after discontinuation of the experimental treatments. Men who have sexual relationship with women of childbearing potential must agree to use contraception during treatment and for at least 3 months after discontinuation of the experimental treatments.
* Patient affiliated to a social security scheme for France, or equivalent for other countries.

Exclusion Criteria

\- Patient with one of these criteria: Patient fit for doublet/triplet regimen Patient with WHO PS 3 or 4 Patient \< 75 years old with WHO PS 0 Patient \< 70 years old with WHO PS 0 or 1

* Uncontrolled intercurrent illness including liver (liver cirrhosis Child Pugh B or C) and lung (one second forced expiratory volume \<50%) severe insufficiency.
* Patients with high microsatellite instability (MSI-H) or a tumour with mismatched repair (dMMR).
* Clinically significant cardiac abnormalities including prior history of any of the following: severe cardiomyopathy, congestive heart failure of New York Heart Association grade ≥3, history of clinically significant (i.e., active) atherosclerotic cardiovascular disease (myocardial infarction, unstable angina, cerebrovascular accident within 6 months prior to the first dose of study treatments).
* Patients with Dihydropyrimidine Dehydrogenase (DPD) enzyme deficiencies (uracilemia ≥ 16 ng/mL).
* Immunotherapy within 3 months before the beginning of the treatment study.
* Patient under treatment by strong CYP3A4 inducers.
* Patients treated by brivudine within 4 weeks before the first dose of study treatment, or concomitant treatment with brivudine.
* Patient with potentially serious infection.
* Administration of live or live attenuated vaccine within 30 days prior to the first dose of study treatment start.
* Poor nutritional state (albuminemia \< 25 g/L or weight loss \> 10% during the last month).
* Hereditary problems of galactose intolerance, total lactase deficiency or glucose galactose malabsorption.
* Other malignancy within 2 years prior to study enrolment, except for localized cancer in situ, basal or squamous cell skin cancer adequately treated.
* Less than 4 weeks from major surgeries and not recovered adequately from the procedure and/or any complications from the surgery.
* Patients with persistent toxicities related to prior treatment of grade greater than 1.Is c urrently participating in or has participated in a study of an investigational agent or has used an investigational device within 3 weeks or 5 half-lives (whichever longer) before study entry.
* Hypersensitivity to one of the active substances or to one of the excipients of the trial treatments.
* Patient with interstitial lung disease or pulmonary fibrosis.
* Patients with history of interstitial pneumonitis or pulmonary fibrosis.
* Has a known psychiatric or substance abuse disorder that would interfere with the patient's ability to cooperate with the requirements of the study.
* Patient who is under judicial protection and patient who is legally institutionalized or under guardianship or not able to give consent.
* Pregnant or breastfeeding woman.
* Inability to undergo the medical follow-up of the trial for geographical, social or psychological reasons.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Northwest Oncology Cooperative Group(GONO)

UNKNOWN

Sponsor Role collaborator

Arbeitsgemeinschaft fur Internistische Onkologie

OTHER

Sponsor Role collaborator

Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD)

OTHER

Sponsor Role collaborator

Federation Francophone de Cancerologie Digestive

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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ICO site Paul Papin

Angers, , France

Site Status

Centre Hospitalier Annecy Genevois

Annecy, , France

Site Status

Hôpital Privé

Antony, , France

Site Status

Centre Hospitalier

Aurillac, , France

Site Status

Centre Hospitalier

Bayeux, , France

Site Status

Ch Cote Basque

Bayonne, , France

Site Status

Ch Simone Veille

Beauvais, , France

Site Status

Chu Jean Minjoz

Besançon, , France

Site Status

Polyclinique Courlancy

Bezannes, , France

Site Status

Centre Hospitalier Béthune Beuvry

Béthune, , France

Site Status

Bordeaux Nord Aquitaine

Bordeaux, , France

Site Status

TIVOLI

Bordeaux, , France

Site Status

Chu Morvan

Brest, , France

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CHU Côte de Nacre

Caen, , France

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Centre Hospitalier

Cholet, , France

Site Status

Hôpitaux civils

Colmar, , France

Site Status

Polyclinique Saint-Côme

Compiègne, , France

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Chu Francois Mitterand

Dijon, , France

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Gf Leclerc

Dijon, , France

Site Status

Institut de cancérologie de Bourgogne GRReCC

Dijon, , France

Site Status

Groupe Hospitalier Mutualiste

Grenoble, , France

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Chd Vendee

La Roche-sur-Yon, , France

Site Status

Hôpital Franco Britannique

Levallois-Perret, , France

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Hôpital Privé Le Bois

Lille, , France

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CHU Dupuytren

Limoges, , France

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Groupe Hospitalier Bretagne Sud

Lorient, , France

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Hôpital Jean Mermoz

Lyon, , France

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Chu La Timone

Marseille, , France

Site Status

Hôpital Européen

Marseille, , France

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CHRU

Nancy, , France

Site Status

Gh Nord Essone

Orsay, , France

Site Status

Chu Cochin

Paris, , France

Site Status

HEGP

Paris, , France

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Montsouris

Paris, , France

Site Status

Saint-Louis

Paris, , France

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Centre Hospitalier

Pau, , France

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CHU Haut Leveque

Pessac, , France

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Centre Cario

Plérin, , France

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Chu La Miletrie

Poitiers, , France

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CH Quimper Concarneau

Quimper, , France

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Cac Jean Godinot

Reims, , France

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Chu Robert Debré

Reims, , France

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Centre Hospitalier

Saint-Denis, , France

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Hôpital Privé

Saint-Grégoire, , France

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Hia Begin

Saint-Mandé, , France

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Groupe Hospitalier Rance Emeraude

St-Malo, , France

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Clinique Sainte-Anne

Strasbourg, , France

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ICANS

Strasbourg, , France

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CHRU Trousseau

Tours, , France

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Hôpital Nord Ouest

Villefranche-sur-Saône, , France

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Saint Joseph Hospital Bochum

Bochum, , Germany

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Krankenhaus Nordwest-CH Frankfurt Am Main

Frankfurt, , Germany

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Universitätsmedizin Göttingen CHU

Göttingen, , Germany

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Hämatologisch Onkologische Praxis Eppendorf

Hamburg, , Germany

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Centro Di Riferimento Oncologico Di Aviano

Aviano, , Italy

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Azienda Ospedaliero Universitaria Policlinico Rodolico San Marco Di Catania

Catania, , Italy

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Azienda Ospedaliero Universitaria Careggi

Florence, , Italy

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Azienda Unita Sanitaria Locale 6 Livorno

Livorno, , Italy

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Istituto Romagnolo Per Lo Studio Dei Tumori Dino Amadori

Meldola, , Italy

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Fondazione IRCCS Istituto Nazionale Dei Tumori

Milan, , Italy

Site Status

Azienda Ospedaliero-Universitatia Di Cagliari

Monserrato, , Italy

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Istituto Oncologico Veneto

Padua, , Italy

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Azienda Ospedaliero-Universitaria Pisana

Pisa, , Italy

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Azienda USL Toscana Centro

Prato, , Italy

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Azienda Unita Sanitaria Locale Della Romagna

Ravenna, , Italy

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Azienda Ospedaliera Policlinico Universitario Tor Vergata

Roma, , Italy

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Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Roma, , Italy

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Casa Sollievo Della Sofferenza

San Giovanni Rotondo, , Italy

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Azienda Ospedaliero-Universitaria Città della salute e della scienza di Torino Presidio Molinette

Torino, , Italy

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Pia Fondazione Di Culto E Religione Card Panico

Tricase, , Italy

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Azienda Sanitaria Universitaria Friuli Centrale

Udine, , Italy

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Hospital Universitari Vall d'Hebron

Barcelona, , Spain

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Hospital Universitario Reina Sofia

Córdoba, , Spain

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Instituto Catalan de Oncologia. Hospital Duran i Reynals

L'Hospitalet de Llobregat, , Spain

Site Status

Hospital Universitario Gregorio Maranon

Madrid, , Spain

Site Status

Hospital Universitario Central de Asturias

Oviedo, , Spain

Site Status

Hospital Universitario de Navarra

Pamplona, , Spain

Site Status

Hospital Clinico Universitario de Salamanca

Salamanca, , Spain

Site Status

Hospital Universitario Clinico San Carlos

San Carlos, , Spain

Site Status

Consorcio Hospital General Universitario de Valencia

Valencia, , Spain

Site Status

Countries

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France Germany Italy Spain

Facility Contacts

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Victor SIMMET

Role: primary

02.41.35.27.39

Emmanuel MAILLARD

Role: primary

04 50 63 66 05

Anne THIROT-BIDAULT

Role: primary

01 46 74 41 73

Daniela BURLACU

Role: primary

04 71 46 47 41

Annie PEYTIER

Role: primary

02 31 51 54 17

Franck AUDEMAR

Role: primary

0559443722

Hanifa AMMARGUELLAT

Role: primary

03 44 11 22 16

Angélique VIENOT

Role: primary

03 81 66 83 41

William MINA

Role: primary

0326840284

Hélène VAN DAMME

Role: primary

03 21 64 43 19

Cédric LECAIL

Role: primary

0556690681

Valérie COCHIN

Role: primary

05 56 69 06 71

Pierre Guillaume POUREAU

Role: primary

02 30 33 80 40

François JUILLARD

Role: primary

0231063106

Thomas DAVIEU

Role: primary

0241498491

Rémi DARRIUS

Role: primary

03-89-12-46-19

Kaïs ALDABBAGH

Role: primary

03 44 92 43 53

Côme LEPAGE

Role: primary

03 80 29 37 50

Leila BENGRINE LEFEVRE

Role: primary

03 80 73 75 06

Antoine DROUILLARD

Role: primary

03 80 67 30 10

Hélène FLESCH

Role: primary

04 76 70 73 33

Margot LALY

Role: primary

02 51 44 61 68

Benoist CHIBAUDEL

Role: primary

01 47 59 19 24

Côme DE METZ

Role: primary

02 20 00 97 57

Clémentine PEYRAMAURE

Role: primary

05 55 05 61 00

Caroline COUFFON

Role: primary

02 97 06 74 55

Jérôme DESRAME

Role: primary

04 37 53 87 26

Laetitia DAHAN

Role: primary

0491386023

Nicolas BARRIERE

Role: primary

04 13 42 77 13

Marie MULLER

Role: primary

03 83 59 84 13

Manal AWAD

Role: primary

01 64 54 29 41

Romain CORIAT

Role: primary

01 58 41 29 61

Julien TAIEB

Role: primary

01 56 09 35 51

Emilie SOULARUE

Role: primary

01 45 21 37 20

Thomas APARICIO

Role: primary

01 42 49 95 97

Juliette THAURY

Role: primary

05 59 92 49 83

Denis SMITH

Role: primary

05 57 65 64 39

Jérôme MARTIN-BABAU

Role: primary

02 96 75 22 16

David TOUGERON

Role: primary

05 49 44 37 51

Karine BIDEAU

Role: primary

0290944117

Damien BOTSEN

Role: primary

03 26 78 71 70

Olivier BOUCHÉ

Role: primary

03 26 78 31 13

Gaëtan DES GUETZ

Role: primary

0555055555

Edith CARTON

Role: primary

02 90 09 44 66

Julie LAVOLE

Role: primary

01.43.98.47.22

Anne-Sophie MOUSSADDAQ

Role: primary

06 15 64 89 56

Louis-Marie DOURTHE

Role: primary

0388453750

Meher BEN ABDELGHANI

Role: primary

03 88 25 24 85

Romain CHAUTARD

Role: primary

02 47 47 75 78

Jonathan OLESINSKI

Role: primary

04 74 09 67 94

Anke REINACHER -SCHICK

Role: primary

+49 (0)234/509-3591

Oliver GOTZE Thorsten

Role: primary

+49 (069) 76 01-44 20

Ute Margarethe KONIG

Role: primary

Alexander STEIN

Role: primary

+49 40 36 03522-0

Luisa FOLTRAN

Role: primary

Giuseppe NOVELLO

Role: primary

Lorenzo ANTONUZZO

Role: primary

Giacomo ALLEGRINI

Role: primary

Alessandro PASSARDI

Role: primary

Filippo PIETRANTONIO

Role: primary

Mario SCARTOZZI

Role: primary

Francesca BERGAMO

Role: primary

Roberto MORETTO

Role: primary

Samantha DI DONATO

Role: primary

Stefano TAMBERI

Role: primary

Vincenzo FORMICA

Role: primary

Lisa SALVATORE

Role: primary

Tiziana PIA LATIANO

Role: primary

Massimo DI MAIO

Role: primary

Emiliano TAMBURINI

Role: primary

Valentina FANOTTO

Role: primary

Marta RODRIGUEZ CASTELLS

Role: primary

+34932744350

Gema Guadalupe Pulido

Role: primary

+34957010380

Cristina Santos Farre

Role: primary

+34932607136

Pilar Garcia Alfonso

Role: primary

+34914269070

Paula JIMENEZ-FONSECA

Role: primary

+34913788275

Ruth Vera Garcia

Role: primary

+34848422222

Maria del Rosario Vidal Tocino

Role: primary

Javier Sastre Valera

Role: primary

Maria José Safont Aguilera

Role: primary

+34963187527

Other Identifiers

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2024-514030-20-00

Identifier Type: CTIS

Identifier Source: secondary_id

PRODIGE 107-ENGIC01-COLOSOTO

Identifier Type: -

Identifier Source: org_study_id

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