A Phase 2 interventional study of Onvansertib and FOLFIRI in Metastatic Colorectal Cancer, CRC and KRAS/NRAS Mutation, sponsored by Cardiff Oncology. Active, not recruiting at 41 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-11-10.
Sponsored by Cardiff Oncology · Phase 2, Interventional, and Treatment
The purpose of this study is to assess 2 different doses of onvansertib to select the lowest dose that is maximally effective, and to assess the safety, efficacy, pharmacokinetics, and pharmacodynamics of onvansertib in combination with FOLFIRI + bevacizumab or FOLFOX + bevacizumab in patients with KRAS or NRAS-mutated metastatic colorectal cancer (CRC) in the first-line setting.
6,541 studies on the registry are indexed under Colorectal Neoplasms; 1,667 are open to participants now.
This study's enrollment of 110 is above the median of 76 across 4,800 interventional studies indexed under Colorectal Neoplasms.
Browse Colorectal Neoplasms studies →Cardiff Oncology is the lead sponsor of 7 studies on the registry; none are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 4 (80%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Histologically or cytologically confirmed
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Brain metastases
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CYP3A (CYP3A4) inhibitors and inducers
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
QT and QTc
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive 20 mg of onvansertib on Days 1 to 5 and Days 15 to 19 of each 28-day treatment cycle + FOLFIRI/BEV on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: Onvansertib · Drug: FOLFIRI · Drug: Bevacizumab
Participants will receive 30 mg of onvansertib + on Days 1 to 5 and Days 15 to 19 of each 28-day treatment cycle + FOLFIRI on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: Onvansertib · Drug: FOLFIRI · Drug: Bevacizumab
Participants will receive FOLFIRI/Bev on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: FOLFIRI · Drug: Bevacizumab
Participants will receive 20 mg of onvansertib on Days 1 to 5 and Days 15 to 19 of each 28-day treatment cycle + FOLFOX on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: Onvansertib · Drug: Bevacizumab · Drug: FOLFOX
Participants will receive 30 mg onvansertib on Days 1 to 5 and Days 15 to 19 of each 28-day treatment cycle + FOLFOX on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: Onvansertib · Drug: Bevacizumab · Drug: FOLFOX
Participants will receive FOLFOX/Bev on Day 1 and Day 15 of each 28-day treatment cycle.
Drug: Bevacizumab · Drug: FOLFOX
Oral capsule
FOLFIRI (irinotecan + fluorouracil \[5-FU\] + leucovorin) as intravenous (IV) infusion
IV Infusion
FOLFOX (leucovorin + fluorouracil \[5-FU\] + oxaliplatin) as intravenous (IV) infusion
Objective Response Rate (ORR)
ORR defined as the proportion of participants who achieved a best overall Response (BOR) of CR or PR per RECIST Version 1.1 from randomization until disease progression, or death due to any cause, as determined by blinded independent central review.
Time frame: Up to approximately 1 year
Progression Free Survival (PFS)
PFS defined as the time from the date of randomization to the earliest documented disease progression per RECIST version 1.1, or death due to any cause, as determined by blinded independent central review.
Time frame: Up to approximately 1 year
Duration of Response (DOR)
DOR defined as the time from the date of first documentation of objective tumor response (CR or PR) to the earliest documented disease progression per RECIST version 1.1, or death due to any cause, as determined by blinded independent central review.
Time frame: Up to approximately 1 year
Number of Participants with an Adverse Event (AE)
Type, incidence, causality and severity of AEs based on National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) Version 5.0. Clinically significant changes from baseline in vital signs, laboratory parameters, electrocardiograms (ECGs), weight, and Eastern Cooperative Oncology Group (ECOG) performance status will be recorded as AEs.
Time frame: Up to approximately 1 year
Disease Control Rate (DCR)
DCR defined as CR plus PR plus stable disease (SD), as determined by independent central review.
Time frame: Up to approximately 1 year
Overall Survival (OS)
OS defined as the time from drug administration to death due to any cause.
Time frame: Up to approximately 1 year
Overall Response (OR)
Defined as CR or PR, PFS, DCR, DOR, and OS associated with a reduction in circulating tumor DNA (ctDNA) mutation allele frequency (MAF).
Time frame: Up to approximately 1 year
Maximum Concentration (Cmax) of Onvansertib and metabolites in combination w/FOLFIRI and bevacizumab or FOLFOX and bevacizumab
Time frame: Day 1 and Day 5 of Cycle 1, and Day 5 of Cycle 3 (cycle is 28 days)
Area Under the Plasma Concentration Curve (AUC) of Onvansertib and metabolites in combination w/FOLFIRI and bevacizumab or FOLFOX and bevacizumab
Time frame: Day 1 and Day 5 of Cycle 1, and Day 5 of Cycle 3 (cycle is 28 days)
Trough Concentration (Ctrough) of Onvansertib and metabolites in combination w/FOLFIRI and bevacizumab or FOLFOX and bevacizumab
Time frame: Day 1 and Day 5 of Cycle 1, and Day 5 of Cycle 3 (cycle is 28 days)
Efficacy: Exposure Response Evaluation of Onvansertib
Time frame: Up to approximately 1 year
Safety: Exposure Response Evaluation of Onvansertib
Time frame: Up to approximately 1 year
Plan to share: No
Started Feb 2024 (actual). Primary completion is estimated for Apr 2027, 37 months after the start.
Of 120 industry-sponsored phase 2 interventional studies under Colorectal Neoplasms, half reached primary completion within 34 months of starting (the median), counting those still running; a quarter within 26 and three quarters within 72. This study's planned 37 months is close to that.
Counting every sponsor, half of 618 studies reached it within 49 months; a quarter within 31 and three quarters within 75.
Since we started tracking on Sep 25, 2026, the dates moved once, on Nov 10, 2026: primary completion Nov 2026 → Apr 2027 and completion Jan 2027 → Apr 2027.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is active, not recruiting, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drugs tested here: Onvansertib · Folfox protocol
Cardiff Oncology