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NCT03829410

Onvansertib in Combination With FOLFIRI and Bevacizumab for Second Line Treatment of Metastatic Colorectal Cancer Patients With a KRAS Mutation

Completed Phase 1, PHASE2 Results posted Last updated 4 March 2025
What this trial tests

Phase 1, PHASE2 trial testing Onvansertib in Metastatic Colorectal Cancer in 68 participants. Completed in 29 January 2024.

Timeline
24 June 2019
Primary endpoint
29 January 2024
29 January 2024

Quick facts

Lead sponsorCardiff Oncology
PhasePhase 1, PHASE2
StatusCompleted
Study typeINTERVENTIONAL
Allocationna
Designsequential
Maskingnone
Primary purposetreatment
Enrollment68
Start date24 June 2019
Primary completion29 January 2024
Estimated completion29 January 2024
Sites7 locations across United States

Drugs / interventions tested

Conditions studied

Sponsor

Cardiff Oncology — full company profile →

Who can join

18 and older, any sex, with Metastatic Colorectal Cancer or KRAS Gene Mutation. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Phase 1b: Number of Participants With Dose-limiting Toxicities (DLTs) Primary · Up to Day 28

DLTs were defined as a Grade 4 hematologic adverse events (AEs), Grade ≥ 3 non-hematologic AEs that were considered related to the study drug and that did not resolve within 14 days following presentation with standard management and care, Grade ≥ 3 thrombocytopenia with bleeding, neutropenic fever, any death not clearly due to the underlying disease or extraneous causes, or any change in liver function that met Hy's Law criteria of a DLT.

GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^21
Phase 1b: Onvansertib 15 mg/m^21
Phase 1b: Onvansertib 18 mg/m^23
Phase 1b: Number of Participants With Treatment-emergent Adverse Events (TEAEs) Primary · Up to a maximum of 81 weeks

AEs were defined as any untoward medical occurrence associated with the use of a drug in humans. TEAEs are defined as any AE that started on or after the first day of study treatment and within 30 days of the last administration of study treatment, or that worsened on or after the first day of study treatment. AE severity was graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 on a scale from Grade 1 (mild) to Grade 5 (death). An AE was considered "serious" if it resulted in death, life-threatening AE, hospitalization or prolonga

Any TEAE
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^29
Phase 1b: Onvansertib 15 mg/m^27
Phase 1b: Onvansertib 18 mg/m^26
Any TEAE Related to Onvansertib
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^28
Phase 1b: Onvansertib 15 mg/m^27
Phase 1b: Onvansertib 18 mg/m^24
Any TEAE CTCAE Grade ≥3
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^27
Phase 1b: Onvansertib 15 mg/m^26
Phase 1b: Onvansertib 18 mg/m^24
Any TEAE CTCAE Grade ≥3 Related to Onvansertib
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^24
Phase 1b: Onvansertib 15 mg/m^21
Phase 1b: Onvansertib 18 mg/m^21
Any Serious TEAE
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^22
Phase 1b: Onvansertib 15 mg/m^23
Phase 1b: Onvansertib 18 mg/m^21
Any Serious TEAE Related to Onvansertib
GroupValue95% CI
Phase 1b: Onvansertib 12 mg/m^20
Phase 1b: Onvansertib 15 mg/m^20
Phase 1b: Onvansertib 18 mg/m^20
All-Treated Analysis Set: Objective Response Rate (ORR) Primary · Up to a maximum of 131 weeks

ORR was defined as the percentage of participants documented to have a confirmed complete response (CR) or partial response (PR) using the Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST v1.1). Two-sided 95% confidence interval (CI) was calculated using the exact binomial Clopper-Pearson method. CR: disappearance of all target and non-target lesions. Any pathological lymph nodes (whether target or non-target) must have had a reduction in short axis to \< 10 mm. All lymph nodes must have been non-pathological in size (\< 10mm short axis). PR: at least a 30% decrease in the su

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^242.99.9 – 81.6
Phase 2 Part 1: Onvansertib 15 mg/m^227.313.3 – 45.5
Phase 2 Part 2: Onvansertib 15 mg/m^215.41.9 – 45.4
Phase 1b and 2 Total: Onvansertib 15 mg/m^226.415.3 – 40.3
Phase 2: Number of Participants With TEAEs Secondary · Up to a maximum of 131 weeks

AEs were defined as any untoward medical occurrence associated with the use of a drug in humans. TEAEs are defined as any AE that started on or after the first day of study treatment and within 30 days of the last administration of study treatment, or that worsened on or after the first day of study treatment. AE severity was graded according to the CTCAE version 5.0 on a scale from Grade 1 (mild) to Grade 5 (death). An AE was considered "serious" if it resulted in death, life-threatening AE, hospitalization or prolongation of hospitalization, persistent or significant incapacity, or congenita

Any TEAE
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^246
Any TEAE Related to Onvansertib
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^226
Any TEAE CTCAE Grade ≥3
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^232
Any TEAE CTCAE Grade ≥3 Related to Onvansertib
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^28
Any Serious TEAE
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^217
Any Serious TEAE Related to Onvansertib
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^21
All-Treated Analysis Set: Disease Control Rate (DCR) Secondary · Up to a maximum of 131 weeks

DCR was defined as the percentage of participants documented to have a confirmed CR, PR or stable disease (SD) using the RECIST v1.1. Two-sided 95% CI was calculated using the exact binomial Clopper-Pearson method. CR: disappearance of all target and non-target lesions. Any pathological lymph nodes (whether target or non-target) must have had a reduction in short axis to \< 10 mm. All lymph nodes must have been non-pathological in size (\< 10mm short axis). PR: at least a 30% decrease in the sum of diameters of target lesions, taking as reference the Baseline sum diameters. SD: neither suff

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^210059.0 – 100.0
Phase 2 Part 1: Onvansertib 15 mg/m^290.975.7 – 98.1
Phase 2 Part 2: Onvansertib 15 mg/m^292.364.0 – 99.8
Phase 1b and 2 Total: Onvansertib 15 mg/m^292.581.8 – 97.9
All-Treated Analysis Set: Progression-free Survival (PFS) Secondary · Up to a maximum of 131 weeks

PFS was defined as the time in months from the date of first administration of study treatment until the first observation of PD or death due to any cause, whichever occurs first, i.e.: (date of first PD or death date of first administration of study treatment +1)/30.4375. Median and 95% CI were calculated using the Kaplan-Meier method. Participants who did not have an observed documented PD or death from any cause were censored at the latest tumor response assessment date. PD: at least a 20% increase in the sum of diameters of target lesions. The sum must also demonstrate an increase of at l

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^2183.7 – NA
Phase 2 Part 1: Onvansertib 15 mg/m^265.6 – 11.1
Phase 2 Part 2: Onvansertib 15 mg/m^283.9 – NA
Phase 1b and 2 Total: Onvansertib 15 mg/m^285.8 – 13.5
All-Treated Analysis Set: Duration of Response (DoR) Secondary · Up to a maximum of 131 weeks

DoR was calculated as the (date of first documented tumor progression or death due to any cause minus date of first documentation of a subsequently confirmed objective response plus 1)/30.4375. Participants who did not have an observed documented PD or death from any cause were censored at the latest tumor response assessment date.

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^212NA – NA
Phase 2 Part 1: Onvansertib 15 mg/m^2123.8 – NA
Phase 2 Part 2: Onvansertib 15 mg/m^2NANA – NA
Phase 1b and 2 Total: Onvansertib 15 mg/m^2127.5 – NA
All-Treated Analysis Set: Overall Survival (OS) Secondary · Up to a maximum of 131 weeks

OS was defined as the time in months from the date of first administration of study treatment until death due to any cause, i.e.: (Date of death date of first administration of study treatment +1)/30.4375. Participants who did not have documented death from any cause were censored at the date they were last known to be alive. OS was added as an endpoint with Protocol Amendment #1, therefore, OS data was only collected from then onward.

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^2NANA – NA
Phase 2 Part 1: Onvansertib 15 mg/m^2NA19.7 – NA
Phase 2 Part 2: Onvansertib 15 mg/m^2NA14.4 – NA
Phase 1b and 2 Total: Onvansertib 15 mg/m^2NA19.7 – NA
All-Treated Analysis Set: Percentage Change in KRAS-mutant Allelic Fraction (MAF) Secondary · Cycle 1 Day 1 and Cycle 2 Day 1 (28-day cycle length)

Blood samples were analyzed for the presence of circulating tumor DNA (ctDNA \[including KRAS mutations\]). KRAS-mutant allelic burden was based on liquid biopsies.

GroupValue95% CI
Phase 1b: Onvansertib 15 mg/m^2-85.5857± 19.44200
Phase 2 Part 1: Onvansertib 15 mg/m^2-76.2323± 26.43313
Phase 2 Part 2: Onvansertib 15 mg/m^2-62.0000± 33.72414
Phase 1b and 2 Total: Onvansertib 15 mg/m^2-74.9000± 27.45740
Phase 2: Observed Plasma Concentration at the End of Each Dosing Interval (Ctrough) of Onvansertib Secondary · Pre-dose on Day 1 of Cycles 1 and 3 (28-day cycle length)

Plasma pharmacokinetic (PK) parameters for onvansertib were estimated using non-compartmental methods.

Cycle 1 Day 1
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^20.0000± 0.0000
Cycle 3 Day 1
GroupValue95% CI
Phase 2: Onvansertib 15 mg/m^20.3406± 0.34496
All-Treated Analysis Set: ORR by Bevacizumab Used in First-line Treatment Secondary · Up to a maximum of 131 weeks

ORR was defined as the percentage of participants documented to have a confirmed CR or PR using the RECIST v1.1. Two-sided 95% CI was calculated using the exact binomial Clopper-Pearson method. Data are presented by bevacizumab used in first-line treatment yes versus no. CR: disappearance of all target and non-target lesions. Any pathological lymph nodes (whether target or non-target) must have had a reduction in short axis to \< 10 mm. All lymph nodes must have been non-pathological in size (\< 10mm short axis). PR: at least a 30% decrease in the sum of diameters of target lesions, taking a

GroupValue95% CI
Phase 1b; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^242.99.9 – 81.6
Phase 2 Part 1; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^24.50.1 – 22.8
Phase 2 Part 1; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^272.739.0 – 94.0
Phase 2 Part 2; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^200.0 – 28.5
Phase 2 Part 2; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^210015.8 – 100.0
Phase 1b and 2 Total; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^210.02.8 – 23.7
Phase 1b and 2 Total; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^276.946.2 – 95.0
All-Treated Analysis Set: PFS by Bevacizumab Used in First-line Treatment Secondary · Up to a maximum of 131 weeks

PFS was defined as the time in months from the date of first administration of study treatment until the first observation of PD or death due to any cause, whichever occurs first, i.e.: (date of first PD or death date of first administration of study treatment +1)/30.4375. Median and 95% CI were calculated using the Kaplan-Meier method. Participants who did not have an observed documented PD or death from any cause were censored at the latest tumor response assessment date. Data are presented by bevacizumab used in first-line treatment yes versus no. PD: at least a 20% increase in the sum of

GroupValue95% CI
Phase 1b; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^2183.7 – NA
Phase 2 Part 1; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^263.6 – 6.1
Phase 2 Part 1; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^2159.5 – NA
Phase 2 Part 2; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^283.7 – NA
Phase 2 Part 2; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^2NANA – NA
Phase 1b and 2 Total; Bevacizumab Used in First-line Treatment: Onvansertib 15 mg/m^265.3 – 8.4
Phase 1b and 2 Total; Bevacizumab Not Used in First-line Treatment: Onvansertib 15 mg/m^2159.5 – NA

Adverse events — posted to ClinicalTrials.gov

Time frame: Up to a maximum of 131 weeks. Reporting threshold: 0%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Phase 1b: Onvansertib 12 mg/m^2
Serious: 2/9 (22%)
Deaths: 0/9
Phase 1b: Onvansertib 15 mg/m^2
Serious: 3/7 (43%)
Deaths: 0/7
Phase 1b: Onvansertib 18 mg/m^2
Serious: 1/6 (17%)
Deaths: 0/6
Phase 2: Onvansertib 15 mg/m^2
Serious: 17/46 (37%)
Deaths: 1/46

Serious adverse events (33 terms)

ReactionSystemPhase 1b: Onvansertib 12 m…Phase 1b: Onvansertib 15 m…Phase 1b: Onvansertib 18 m…Phase 2: Onvansertib 15 mg…
VomitingGastrointestinal disorders
DehydrationMetabolism and nutrition disorders
NauseaGastrointestinal disorders
HepatectomySurgical and medical procedures
HydronephrosisRenal and urinary disorders
Abdominal painGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
ColitisGastrointestinal disorders
ConstipationGastrointestinal disorders
Intestinal obstructionGastrointestinal disorders
Large intestine perforationGastrointestinal disorders
Small intestinal obstructionGastrointestinal disorders
Abdominal abscessInfections and infestations
Hepatitis BInfections and infestations
Liver abscessInfections and infestations
PyelonephritisInfections and infestations
SepsisInfections and infestations
Subcutaneous abscessInfections and infestations
UrosepsisInfections and infestations
SigmoidectomySurgical and medical procedures
FatigueGeneral disorders
Systemic inflammatory response syndromeGeneral disorders
Febrile neutropeniaBlood and lymphatic system disorders
Retinal detachmentEye disorders
Hepatic cirrhosisHepatobiliary disorders
Other adverse events (233 terms — click to expand)

ReactionSystemPhase 1b: Onvansertib 12 m…Phase 1b: Onvansertib 15 m…Phase 1b: Onvansertib 18 m…Phase 2: Onvansertib 15 mg…
FatigueGeneral disorders
NauseaGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
StomatitisGastrointestinal disorders
Neutrophil count decreasedInvestigations
AnaemiaBlood and lymphatic system disorders
NeutropeniaBlood and lymphatic system disorders
Abdominal painGastrointestinal disorders
ConstipationGastrointestinal disorders
HypertensionVascular disorders
AlopeciaSkin and subcutaneous tissue disorders
White blood cell count decreasedInvestigations
Platelet count decreasedInvestigations
VomitingGastrointestinal disorders
Decreased appetiteMetabolism and nutrition disorders
HeadacheNervous system disorders
EpistaxisRespiratory, thoracic and mediastinal disorders
Weight decreasedInvestigations
CoughRespiratory, thoracic and mediastinal disorders
DyspnoeaRespiratory, thoracic and mediastinal disorders
Back painMusculoskeletal and connective tissue disorders
Non-cardiac chest painGeneral disorders
Aspartate aminotransferase increasedInvestigations
DehydrationMetabolism and nutrition disorders
Palmar-plantar erythrodysaesthesia syndromeSkin and subcutaneous tissue disorders
Corona virus infectionInfections and infestations
Blood alkaline phosphatase increasedInvestigations
Lymphocyte count decreasedInvestigations
LeukopeniaBlood and lymphatic system disorders
HypokalaemiaMetabolism and nutrition disorders
Peripheral sensory neuropathyNervous system disorders
ArthralgiaMusculoskeletal and connective tissue disorders
HaemorrhoidsGastrointestinal disorders
PyrexiaGeneral disorders
Oedema peripheralGeneral disorders
Blood bicarbonate decreasedInvestigations
HypocalcaemiaMetabolism and nutrition disorders
HyponatraemiaMetabolism and nutrition disorders
HypomagnesaemiaMetabolism and nutrition disorders
DysgeusiaNervous system disorders

Most-reported serious reactions: Vomiting, Dehydration, Nausea, Hepatectomy, Hydronephrosis, Abdominal pain, Diarrhoea, Colitis.

Data from ClinicalTrials.gov NCT03829410 adverse events section.

Sponsor's own description

The purpose of the Phase 1b/2 study is to determine the safety and efficacy of Onvansertib, administered orally, daily on Day 1-5 and Day 15-19 of each 28-day cycle, in combination with FOLFIRI + Bevacizumab, as second-line treatment in adult participants who have metastatic colorectal cancer with a KRAS mutation. Participants must have histologically confirmed metastatic and unresectable disease, and previously failed treatment or be intolerant to fluoropyrimidine and oxaliplatin with or without bevacizumab.

Publications & conference data

8 peer-reviewed publications reference this trial (live from Europe PMC):

  1. The two sides of chromosomal instability: drivers and brakes in cancer.
    Hosea R, Hillary S, Naqvi S, Wu S, et al · · 2024 · cited 102× · PMID 38553459 · DOI 10.1038/s41392-024-01767-7
  2. Harnessing the tumor microenvironment: targeted cancer therapies through modulation of epithelial-mesenchymal transition.
    Glaviano A, Lau HS, Carter LM, Lee EHC, et al · · 2025 · cited 90× · PMID 39806516 · DOI 10.1186/s13045-024-01634-6
  3. A new wave of innovations within the DNA damage response.
    Li Q, Qian W, Zhang Y, Hu L, et al · · 2023 · cited 85× · PMID 37679326 · DOI 10.1038/s41392-023-01548-8
  4. Targeting <i>KRAS</i> in Cancer: Promising Therapeutic Strategies.
    Mustachio LM, Chelariu-Raicu A, Szekvolgyi L, Roszik J. · · 2021 · cited 67× · PMID 33801965 · DOI 10.3390/cancers13061204
  5. Therapeutic Targeting of DNA Damage Response in Cancer.
    Choi W, Lee ES. · · 2022 · cited 61× · PMID 35163621 · DOI 10.3390/ijms23031701
  6. KRAS Mutations in Solid Tumors: Characteristics, Current Therapeutic Strategy, and Potential Treatment Exploration.
    Yang Y, Zhang H, Huang S, Chu Q. · · 2023 · cited 50× · PMID 36675641 · DOI 10.3390/jcm12020709
  7. Onvansertib in Combination with FOLFIRI and Bevacizumab in Second-Line Treatment of KRAS-Mutant Metastatic Colorectal Cancer: A Phase Ib Clinical Study.
    Ahn DH, Barzi A, Ridinger M, Samuëlsz E, et al · · 2024 · cited 46× · PMID 38231047 · DOI 10.1158/1078-0432.ccr-23-3053
  8. New Horizons of Synthetic Lethality in Cancer: Current Development and Future Perspectives.
    Previtali V, Bagnolini G, Ciamarone A, Ferrandi G, et al · · 2024 · cited 41× · PMID 38955347 · DOI 10.1021/acs.jmedchem.4c00113

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Trials by the same sponsor.

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Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03829410.

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