Colorectal CarcinomaPhase 2COLOSOTONCT07124884
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
A Phase 2 study testing Administration of experimental treatment association (sotorasib, panitumumab 5FU) in people with Colorectal Carcinoma and KRAS G12C Mutation, run by Federation Francophone de Cancerologie Digestive at 80 sites in 4 countries.
Trial summary
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. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Colorectal Carcinoma, KRAS G12C Mutation, Unresectable Colorectal Cancer
- What is being tested?
- Administration of experimental treatment association (sotorasib, panitumumab 5FU)
- Type of treatment
- Pill or oral medicine, Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 300 participants
- Where
- 80 sitesin 4 countries
- Study dates
- 31 Aug 2025to 30 Dec 2030
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- 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
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- 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.
Who cannot join
- 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.
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- 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.
Trial locations and contacts
80 sites in 4 countries. Contact the study team or a site near you to ask about taking part.
80 sites in 4 countries
France50 sites
ICO site Paul Papin
Angers
Victor SIMMET, 02.41.35.27.39, victor.simmet@ico.unicancer.fr
Centre Hospitalier Annecy Genevois
Annecy
Emmanuel MAILLARD, 04 50 63 66 05, emaillard@ch-annecygenevois.fr
Hôpital Privé
Antony
Anne THIROT-BIDAULT, 01 46 74 41 73, a.t.bidault@gmail.com
Centre Hospitalier
Aurillac
Daniela BURLACU, 04 71 46 47 41, d.burlacu@ch-aurillac.fr
Centre Hospitalier
Bayeux
Annie PEYTIER, 02 31 51 54 17, a.peytier@ch-ab.fr
Ch Cote Basque
Bayonne
Franck AUDEMAR, 0559443722, faudemar@ch-cotebasque.fr
Ch Simone Veille
Beauvais
Hanifa AMMARGUELLAT, 03 44 11 22 16, h.ammarguellat@ch-beauvais.fr
Chu Jean Minjoz
Besançon
Angélique VIENOT, 03 81 66 83 41, angelique.vienot@gmail.com
Centre Hospitalier Béthune Beuvry
Béthune
Hélène VAN DAMME, 03 21 64 43 19, helene.vandamme@ch-bethune.fr
Polyclinique Courlancy
Bezannes
William MINA, 0326840284, wmina@centre-icone.fr
Bordeaux Nord Aquitaine
Bordeaux
Cédric LECAIL, 0556690681, lecail@hotmail.com
TIVOLI
Bordeaux
Valérie COCHIN, 05 56 69 06 71, v.cochin@tivoli-oncologie.fr
Chu Morvan
Brest
Pierre Guillaume POUREAU, 02 30 33 80 40, pgpoureau@gmail.com
CHU Côte de Nacre
Caen
François JUILLARD, 0231063106, fjuillard7@gmail.com
Centre Hospitalier
Cholet
Thomas DAVIEU, 0241498491, thomas.davieau@ch-cholet.fr
Hôpitaux civils
Colmar
Rémi DARRIUS, 03-89-12-46-19, remi.darrius@gmail.com
Polyclinique Saint-Côme
Compiègne
Kaïs ALDABBAGH, 03 44 92 43 53, kais.aldabbagh@stcome.com
Chu Francois Mitterand
Dijon
Côme LEPAGE, 03 80 29 37 50, come.lepage@u-bourgogne.fr
Gf Leclerc
Dijon
Leila BENGRINE LEFEVRE, 03 80 73 75 06, lbengrine@cgfl.fr
Institut de cancérologie de Bourgogne GRReCC
Dijon
Antoine DROUILLARD, 03 80 67 30 10, adrouillard@icb-cancer.fr
Groupe Hospitalier Mutualiste
Grenoble
Hélène FLESCH, 04 76 70 73 33, helene.flesch@avec.fr
Chd Vendee
La Roche-sur-Yon
Margot LALY, 02 51 44 61 68, margot.laly@ght85.fr
Hôpital Franco Britannique
Levallois-Perret
Benoist CHIBAUDEL, 01 47 59 19 24, benoist.chibaudel@ihfb.org
Hôpital Privé Le Bois
Lille
Côme DE METZ, 02 20 00 97 57, come_de_metz@hotmail.fr
CHU Dupuytren
Limoges
Clémentine PEYRAMAURE, 05 55 05 61 00, clementine.peyramaure@chu-limoges.fr
Groupe Hospitalier Bretagne Sud
Lorient
Caroline COUFFON, 02 97 06 74 55, c.couffon@ghbs.bzh
Hôpital Jean Mermoz
Lyon
Jérôme DESRAME, 04 37 53 87 26, jerome.desrame@orange.fr
Chu La Timone
Marseille
Laetitia DAHAN, 0491386023, laetitia.dahan@ap-hm.fr
Hôpital Européen
Marseille
Nicolas BARRIERE, 04 13 42 77 13, n_barriere@yahoo.fr
CHRU
Nancy
Marie MULLER, 03 83 59 84 13, m.muller7@chru-nancy.fr
Gh Nord Essone
Orsay
Manal AWAD, 01 64 54 29 41, m.awad@gh-nord-essonne.fr
Chu Cochin
Paris
Romain CORIAT, 01 58 41 29 61, romain.coriat@aphp.fr
HEGP
Paris
Julien TAIEB, 01 56 09 35 51, julien.taieb@aphp.fr
Montsouris
Paris
Emilie SOULARUE, 01 45 21 37 20, emilie.soularue@imm.fr
Saint-Louis
Paris
Thomas APARICIO, 01 42 49 95 97, thomas.aparicio@aphp.fr
Centre Hospitalier
Pau
Juliette THAURY, 05 59 92 49 83, juliette.thaury@ch-pau.fr
CHU Haut Leveque
Pessac
Denis SMITH, 05 57 65 64 39, denis.smith@chu-bordeaux.fr
Centre Cario
Plérin
Jérôme MARTIN-BABAU, 02 96 75 22 16, j.martin@cario-sante.fr
Chu La Miletrie
Poitiers
David TOUGERON, 05 49 44 37 51, david.tougeron@chu-poitiers.fr
David TOUGERON
CH Quimper Concarneau
Quimper
Karine BIDEAU, 0290944117, karinebideau@orange.fr
Cac Jean Godinot
Reims
Damien BOTSEN, 03 26 78 71 70, dbotsen@chu-reims.fr
Chu Robert Debré
Reims
Olivier BOUCHÉ, 03 26 78 31 13, obouche@chu-reims.fr
Centre Hospitalier
Saint-Denis
Gaëtan DES GUETZ, 0555055555, gaetan.desguetz@ch-stdenis.fr
Hôpital Privé
Saint-Grégoire
Edith CARTON, 02 90 09 44 66, edith.carton@icrb.fr
Hia Begin
Saint-Mandé
Julie LAVOLE, 01.43.98.47.22, julie.lavole@intradef.gouv.fr
Groupe Hospitalier Rance Emeraude
St-Malo
Anne-Sophie MOUSSADDAQ, 06 15 64 89 56, anne72m@gmail.com
Clinique Sainte-Anne
Strasbourg
Louis-Marie DOURTHE, 0388453750, lm.dourthe@solcrr.org
ICANS
Strasbourg
Meher BEN ABDELGHANI, 03 88 25 24 85, m.ben-abdelghani@icans.eu
CHRU Trousseau
Tours
Romain CHAUTARD, 02 47 47 75 78, romain.chautard@gmail.com
Hôpital Nord Ouest
Villefranche-sur-Saône
Jonathan OLESINSKI, 04 74 09 67 94, jolesinski@hno.fr
Italy17 sites
Centro Di Riferimento Oncologico Di Aviano
Aviano
Luisa FOLTRAN
Azienda Ospedaliero Universitaria Policlinico Rodolico San Marco Di Catania
Catania
Giuseppe NOVELLO
Azienda Ospedaliero Universitaria Careggi
Florence
Lorenzo ANTONUZZO
Azienda Unita Sanitaria Locale 6 Livorno
Livorno
Giacomo ALLEGRINI
Istituto Romagnolo Per Lo Studio Dei Tumori Dino Amadori
Meldola
Alessandro PASSARDI
Fondazione IRCCS Istituto Nazionale Dei Tumori
Milan
Filippo PIETRANTONIO
Azienda Ospedaliero-Universitatia Di Cagliari
Monserrato
Mario SCARTOZZI
Istituto Oncologico Veneto
Padova
Francesca BERGAMO
Azienda Ospedaliero-Universitaria Pisana
Pisa
Roberto MORETTO
Azienda USL Toscana Centro
Prato
Samantha DI DONATO
Azienda Unita Sanitaria Locale Della Romagna
Ravenna
Stefano TAMBERI
Azienda Ospedaliera Policlinico Universitario Tor Vergata
Roma
Vincenzo FORMICA
Fondazione Policlinico Universitario Agostino Gemelli IRCCS
Roma
Lisa SALVATORE
Casa Sollievo Della Sofferenza
San Giovanni Rotondo
Tiziana PIA LATIANO
Azienda Ospedaliero-Universitaria Città della salute e della scienza di Torino Presidio Molinette
Torino
Massimo DI MAIO
Pia Fondazione Di Culto E Religione Card Panico
Tricase
Emiliano TAMBURINI
Azienda Sanitaria Universitaria Friuli Centrale
Udine
Valentina FANOTTO
Spain9 sites
Hospital Universitari Vall d'Hebron
Barcelona
Marta RODRIGUEZ CASTELLS, +34932744350, martarodriguez@vhio.net
Hospital Universitario Reina Sofia
Córdoba
Gema Guadalupe Pulido, +34957010380, gemapulido.gp@gmail.com
Instituto Catalan de Oncologia. Hospital Duran i Reynals
L'Hospitalet de Llobregat
Cristina Santos Farre, +34932607136, csantos@iconcologia.net
Hospital Universitario Gregorio Maranon
Madrid
Pilar Garcia Alfonso, +34914269070, pgarcaalfonso@gmail.com
Hospital Universitario Central de Asturias
Oviedo
Paula JIMENEZ-FONSECA, +34913788275, ttd@ttdgroup.org
Hospital Universitario de Navarra
Pamplona
Ruth Vera Garcia, +34848422222, ruth.vera.garcia@navarra.es
Hospital Clinico Universitario de Salamanca
Salamanca
Maria del Rosario Vidal Tocino
Hospital Universitario Clinico San Carlos
San Carlos
Javier Sastre Valera
Consorcio Hospital General Universitario de Valencia
Valencia
Maria José Safont Aguilera, +34963187527, mjsafont@yahoo.es
Germany4 sites
Saint Joseph Hospital Bochum
Bochum
Anke REINACHER -SCHICK, +49 (0)234/509-3591, onkologie@klinikum-bochum.de
Krankenhaus Nordwest-CH Frankfurt Am Main
Frankfurt
Oliver GOTZE Thorsten, +49 (069) 76 01-44 20
Universitätsmedizin Göttingen CHU
Göttingen
Ute Margarethe KONIG
Hämatologisch Onkologische Praxis Eppendorf
Hamburg
Alexander STEIN, +49 40 36 03522-0, stein@hope-hamburg.de
About this study
Official title: COLOSOTO: Single-arm Phase II Study Evaluating 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
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
Read the detailed description
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
- Being tested
- Administration of experimental treatment association (sotorasib, panitumumab 5FU)
- Keywords
- sotorasib, colorectal cancer, KRAS G12C
- Medical subject headings
- Colorectal Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Administration of experimental treatment association (sotorasib, panitumumab 5FU)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.
| Study group | Role | What they receive |
|---|---|---|
| 5-fluorouracil plus Panitumumab and Sotorasib | Experimental | 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. Receives: Drug: Administration of experimental treatment association (sotorasib, panitumumab 5FU) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Percentage of patient alive or without progression 8 months after inclusion.
Progression will be assessed by the investigator according to recist 1.1 based on images performed every 8 weeks even in case of deferred treatments.
Clinical progression will not be considered as an event.
Measured: at 8 months after the inclusion.
Secondary outcomes (1)
Overall survival (OS)
Overall survival was defined as the time from the date of inclusion to the patient's death (all causes). For alive patients, the date of the latest news was taken into account.
Measured: up to 2 years after inclusion.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Aug 2025
- Study start31 Aug 2025 (estimated)
- Primary completion30 Jun 2030 (estimated)
- Study completion30 Dec 2030 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Colorectal CarcinomaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 300 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Federation Francophone de Cancerologie Digestive
- Sponsor type
- University, hospital or other
- Collaborators
- Northwest Oncology Cooperative Group(GONO), Arbeitsgemeinschaft fur Internistische Onkologie, Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07124884
- Sponsor's protocol ID
- PRODIGE 107-ENGIC01-COLOSOTO
- Other IDs
- 2024-514030-20-00
- Acronym
- COLOSOTO
- Status last verified
- Aug 2025
- First submitted
- 8 Aug 2025
- Last updated
- 15 Aug 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- COLOSOTO: Single-arm Phase II Study Evaluating 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
- ClinicalTrials.gov ID
- NCT07124884
- Acronym / sponsor ID
- COLOSOTO / PRODIGE 107-ENGIC01-COLOSOTO
- Keywords
- sotorasib, colorectal cancer, KRAS G12C
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 300 participants (estimated)
- Lead sponsor
- Federation Francophone de Cancerologie DigestiveUniversity, hospital or other
- Collaborators
- Northwest Oncology Cooperative Group(GONO), Arbeitsgemeinschaft fur Internistische Onkologie, Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD)
- Study start
- 31 Aug 2025 (estimated)
- Primary completion
- 30 Jun 2030 (estimated)
- Study completion
- 30 Dec 2030 (estimated)
- First posted
- 15 Aug 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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
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
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| 5-fluorouracil plus Panitumumab and Sotorasib | Experimental | Drug: Administration of experimental treatment association (sotorasib, panitumumab 5FU)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. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (14 listed)
- 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:
Key exclusion criteria (22 listed)
- 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).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| 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. | Drug | 5-fluorouracil plus Panitumumab and Sotorasib |
Primary outcome
Percentage of patient alive or without progression 8 months after inclusion.
Time frame: at 8 months after the inclusion.
Progression will be assessed by the investigator according to recist 1.1 based on images performed every 8 weeks even in case of deferred treatments. Clinical progression will not be considered as an event.
1 secondary outcome
Overall survival (OS)
Time frame: up to 2 years after inclusion.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Aug 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
80 sites in 4 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Administration of experimental treatment association (sotorasib, panitumumab 5FU) in people with Colorectal Carcinoma and KRAS G12C Mutation, run by Federation Francophone de Cancerologie Digestive at 80 sites in 4 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 14 inclusion and 22 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 15 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 80 sites in France, Italy, Spain, Germany. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Percentage of patient alive or without progression 8 months after inclusion. (time frame: at 8 months after the inclusion.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Aug 2025.