Assessment of the Safety and Efficacy of C019199 Plus Sintilimab in Participants With Advanced Solid Tumors

A Phase I/II Clinical Study on the Safety, Tolerability and Preliminary Efficacy of C019199 in Combination With Sintilimab in Patients With Advanced Solid Tumors

This is a phase I/II non-randomized, open-label, single-arm, multicenter study to evaluate the Safety and Efficacy of C019199 Plus Sintilimab in Participants With Advanced Solid Tumors.

Study Overview

• Status: Active, not recruiting
• Conditions: Solid Tumor
• Intervention / Treatment: Drug: C019199; Drug: Sintilimab

Detailed Description

Phase I will determine and confirm the maximum tolerated dose(MTD) and recommended phase II dose(RP2D) for C019199 in combination with 200 milligrams (mg) ( intravenous[IV], every 3 weeks [Q3W]) Sintilimab in patients with advanced Solid tumors.

Phase II will evaluate the safety and efficacy of the combination of C019199 and Sintilimab in selected solid tumors at the RP2D from Phase I.

• Study Type: Interventional
• Enrollment (Estimated): 155
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• China
  • Fujian
    • Xiamen, Fujian, China
      • The First Affiliated Hospital of Xiamen University
  • Hunan
    • Changsha, Hunan, China
      • Hunan Cancer Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

Participants are eligible to be included in the study only if all of the following criteria apply:

1. Age ≥18 years and <76 years at the time of signing informed consent, male or female;
2. Histologically or cytologically confirmed locally advanced or metastatic solid tumors that have progressed on or intolerant to standard therapy or whom no standard therapy exists;
3. ECOG score: 0-1;
4. Life expectancy of 3 months or more;
5. Phase II: have measurable disease based on RECIST 1.1 ;
6. Phase II: agree to provide archival tumor tissue or newly obtained biopsy of a tumor lesion ;
7. Have adequate organ function ;
8. A male or female participant must agree to use contraception during the treatment period and for at least 6 months after the last dose of study treatment ;
9. Voluntary agreement to provide written informed consent and the willingness and ability to comply with all aspects of the protocol.

Exclusion Criteria:

Subjects meeting any of the following criteria must be excluded from this study:

1. Known hypersensitivity to CSF-1R inhibitors or Sintilimab;
2. Receipt of (or planned receipt of) anti-tumor therapies within 4 weeks prior to first dose through the end of the study treatment period;
3. Incomplete recovery from prior therapy toxicities (i.e. grade 2 or higher toxicities at screening, except for alopecia, pigmentation changes, or immune-mediated hypothyroidism that is stable with hormone replacement);
4. History of malignancies other than the cancer being treated in this study (Exceptions include: malignancies that have been cured with no recurrence within 3 years prior to enrollment; completely resected basal cell or squamous cell skin cancer; any completely resected carcinoma in situ);
5. Major surgery (grade III or IV surgery) within 4 weeks prior to first dose without complete recovery;
6. History of prior surgeries or severe gastrointestinal diseases such as dysphagia, active gastric ulcers, ulcerative colitis, Crohn's disease, intestinal obstruction etc., that may affect absorption, distribution, metabolism of study treatment per investigator's judgement;
7. Any significant clinical or laboratory abnormalities that are considered clinically significant per investigator's judgement and make the subject unsuitable for enrollment, such as: uncontrolled active infections (CTCAE v5.0 grade 2), uncontrolled diabetes (fasting blood glucose >7.8 mmol/L despite optimal medical therapy), uncontrolled hypertension (systolic blood pressure >160 mmHg and/or diastolic blood pressure >100 mmHg despite optimal medical therapy), peripheral neuropathy ≥ grade 2 (CTCAE v5.0), congestive heart failure ≥ grade 2 (CTCAE v5.0), myocardial infarction within the last 6 months, severe/unstable angina or coronary/peripheral artery bypass graft, arterial thromboembolism or deep vein thrombosis, stroke and/or transient ischemic attack, moderate to severe hepatic cirrhosis, uncontrolled major seizure disorders, known history of autoimmune disease that is active or may relapse (except for clinically stable hypothyroidism);
8. Known active infection of human immunodeficiency virus (HIV) or hepatitis C virus (HCV);
9. For hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb) positive subjects, HBV DNA level above upper limit of reference range;
10. Pregnant or lactating women;
11. Severe psychological or psychiatric abnormalities that may affect compliance with study requirements;
12. Detection of active or untreated CNS metastases on baseline imaging assessments by CT or MRI during screening: a) If new asymptomatic CNS metastases are detected on baseline scans, subjects must receive radiotherapy and/or surgery for CNS metastases, and can be enrolled without repeat CNS imaging if meeting all other criteria; b) Subjects with history of treated brain or meningeal metastases can be enrolled if clinically stable for at least 2 months and systemic high-dose corticosteroids (>10 mg/day prednisone or equivalent) has been discontinued for at least 4 weeks.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: C019199 plus Sintilimab; Patients with selected tumors will received oral C019199 at a starting dose of 100mg once daily in combination with intravenous Sintilimab 200mg every 3 weeks ( Q3W ) on a 21-day treatment cycle until disease progression, development of unacceptable toxicity, or withdrawal of consent .	Drug: C019199; The C019199 will be taken orally, once a day; Other Names: C019199 Tablets; Drug: Sintilimab; Sintilimab will be administrated with intravenous infusion, 200mg, every 3 weeks.; Other Names: IBI308

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Dose-Limiting Toxicity (DLT)	Dose-limiting toxicity (DLT) refers to a drug-related toxicity during treatment with the drug, the severity of which is clinically unacceptable, limiting the further escalation of drug dose.	Cycle 1 (Cycle length=21 days)
Objective Response Rate (ORR) Based on iRECIST	ORR was defined as the percentage of participants with a best overall response (BOR) of complete response (CR) or partial response (PR) for target and non-target lesions.	From date of enrollment until the date of first documented progression or death
Progression-free Survival (PFS) after administration	Progression-free Survival (PFS) is defined as the time from the date of first dose of the study drug to the first documented disease progression (according to iRECIST ) or death (due to any cause), whichever occurs first.	From date of enrollment until the date of first documented progression or death

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Treatment-emergent Adverse Events( TEAEs )and Serious Adverse Events （SAEs）	A TEAE was defined as an adverse event (AE) that emerged during the time from the first dose of study drug to 28 days following the last dose of study drug,which does not necessarily have a causal relationship with the treatment. A Serious AE is any untoward medical occurrence that at any dose: resulted in death; was life threatening (that is, the participant was at immediate risk of death from the AE as it occurred; this does not include an event that, had it occurred in a more severe form or was allowed to continue, might have caused death) required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity; was a congenital anomaly/birth defect or is medically important due to other reasons than the above mentioned criteria	From the first dose until 28 days after the last dose
Cmax	Maximum Plasma Concentration	Cycle 1 Day 1; Cycle 1 Day 21
AUC(0-t):	Area under the concentration-time curve (AUC)	Cycle 1 Day 1; Cycle 1 Day 21
T1/2	Terminal Half-life	Cycle 1 Day 1; Cycle 1 Day 21
Disease Control Rate (DCR) after administration	Disease Control Rate (DCR) is defined as the proportion of patients with complete response, partial response and stable disease.	From date of enrollment until the date of first documented progression or death
Duration of Remission (DoR) after administration	Duration of Remission (DoR) is defined as the time from the first documentation of remission (PR or better) to the first documented disease progression evidence (according to iRECIST ) of the responders (who achieve PR or better response).se).	From date of enrollment until the date of first documented progression or death
Overall Survival (OS) after administration	OS is defined as the time from the date of study treatment to the date of death due to any cause .	The time from the date of enrollment until death

Collaborators and Investigators

• Sponsor: Fujian Haixi Pharmaceuticals Co., Ltd.
• Investigators: Principal Investigator: YONGCHANG ZHANG, Hunan Cancer Hospital; Principal Investigator: Feng Ye, The First Affiliated Hospital of Xiamen University

Study record dates

Study Major Dates

• Study Start (Actual): July 19, 2023
• Primary Completion (Estimated): August 30, 2026
• Study Completion (Estimated): August 30, 2026

Study Registration Dates

• First Submitted: January 14, 2024
• First Submitted That Met QC Criteria: January 14, 2024
• First Posted (Actual): January 23, 2024

Study Record Updates

• Last Update Posted (Actual): November 28, 2025
• Last Update Submitted That Met QC Criteria: November 25, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; sintilimab
• Other Study ID Numbers: HXP019-CTPI-02

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No