About this trial
This study constitutes an open-label, multi-cohort, multi-center Phase Ib/II clinical study, developed to assess the safety, tolerability, and therapeutic efficacy of SYS6090 injection when administered in combination with bevacizumab, or in triple combination with bevacizumab and chemotherapy, among patients diagnosed with advanced colorectal cancer.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Subjects must be ≥18 years of age.
At least one extracranial measurable lesion at baseline according to RECIST 1.1 criteria.
Eastern Cooperative Oncology Group performance status of 0 or 1.
Expected survival ≥ 3 months.
Disqualifiers
Subjects with clinically active central nervous system metastases;
with a history of other primary malignant tumors within 5 years before administration;
Subjects assigned to Cohort 1 who have received prior regorafenib treatment.;
Prior documented interstitial lung disease (ILD)/ pneumonitis that required steroids, current ILD/ pneumonitis, or suspected ILD/ pneumonitis that cannot be ruled out by imaging at screening;
Trial design
Parallel
Treatments tested in this trial
SYS6090 (Fixed Dose Level A) + bevacizumab
DrugParticipants will receive intravenous SYS6090 at fixed dose level A combined with intravenous bevacizumab, administered per cycle schedule specified in study protocol, for advanced/palliative unresectable pMMR/MSS colorectal cancer.
SYS6090 (Fixed Dose Level B ) + bevacizumab
DrugParticipants will receive intravenous SYS6090 at fixed dose level B plus intravenous bevacizumab per protocol-defined cycle schedule for unresectable advanced pMMR/MSS colorectal cancer.
SYS6090 RP2D + bevacizumab +mFOLFOX6
DrugParticipants will receive intravenous SYS6090 at RP2D plus intravenous bevacizumab combined with standard mFOLFOX6 chemotherapy regimen (oxaliplatin, leucovorin, fluorouracil), administered per protocol-defined cycle schedule for unresectable advanced pMMR/MSS colorectal cancer.
SYS6090 RP2D + bevacizumab
DrugParticipants will receive intravenous SYS6090 at RP2D plus intravenous bevacizumab, administered per protocol-defined cycle schedule for unresectable advanced pMMR/MSS colorectal cancer.
Regorafenib
DrugOral regorafenib monotherapy as standard control for metastatic pMMR/MSS colorectal cancer.
SYS6090 PR2D+ bevacizumab + FOLFOXIRI
DrugParticipants will receive intravenous SYS6090at RP2D plus intravenous bevacizumab combined with FOLFOXIRI triple chemotherapy (oxaliplatin, irinotecan, leucovorin, fluorouracil) per study cycle schedule for metastatic pMMR/MSS colorectal cancer.
bevacizumab + FOLFOXIRI
DrugParticipants will receive intravenous bevacizumab combined with FOLFOXIRI triple chemotherapy (oxaliplatin, irinotecan, leucovorin, fluorouracil) per study cycle schedule for metastatic pMMR/MSS colorectal cancer.
Treatment groups
7
Treatment groupsSee each treatment group below.
Trial outcomes
Primary outcomes
Recommended Phase 2 Dose (RP2D), Safety and Tolerability
RP2D of SYS6090 combination therapy,Safety and tolerability are evaluated via incidence and severity of all Adverse Events (AEs) and Serious Adverse Events (SAEs) graded per NCI-CTCAE version 6.0, including abnormal laboratory tests, ECG parameters and vital signs from screening through end of safety follow-up.
Objective Response Rate (ORR) assessed per RECIST v1.1
ORR per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1) assessed by investigator was defined as the percentage of participants with at least one visit confirmed complete response (CR) or partial response (PR), for all cohorts in Phase Ib and Cohort 1 of Phase II expansion stage.
Progression-Free Survival (PFS) assessed per RECIST v1.1
PFS per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1) assessed by investigator was defined as the time from the date of randomization or first study treatment until the date of confirmed progressive disease (PD), or death by any cause in the absence of progression, regardless of whether the participant withdrew from study therapy or received another anticancer therapy prior to progression, for Cohort 2 of Phase II expansion stage.
Sponsors and contacts
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