> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-study-of-qlc5508-combinations-in-patients-with-advanced-3bc9c23c-c6f8-4296-981a-eb548ab440e4 > Record changed: 2026-10-13 # A Study of QLC5508 Combinations in Patients With Advanced Solid Tumors NCT07256782 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Phase Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Recruitment status Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Participants 444 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Lead sponsor Qilu Pharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Start date 2025-10-24 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) Number of sites 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Title and summary **Summary** QLC5508 is a fully humanized IgG1 antibody-drug conjugate (ADC) which specifically binds to B7-H3, a target wildly expressed on solid tumor cells. The objectives of this study are to investigate the safety, tolerability, pharmacokinetics and anti-tumor activity of QLC5508 in combination with other anti-cancer agents in patients with advanced solid tumor patients. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Short title** A Study of QLC5508 Combinations in Patients With Advanced Solid Tumors Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Official title** A Phase Ib/II, Open-label, Multi-center Study to Evaluate Safety, Tolerability, Pharmacokinetics and Efficacy of Intravenous Administration of QLC5508 in Combination With Other Anti-tumor Agents in Patients With Advanced Solid Tumors Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Status and phase **Control arm** Open label Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Recruitment status** Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Phase** Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Dates **Completion date** 2028-05-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **First posted** 2025-12-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Registry last updated** 2025-12-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Primary completion date** 2026-10-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Start date** 2025-10-24 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Size and sites **Participants** 444 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Planned participants** 444 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Protocol amendments** 0 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Number of sites** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Sponsor and oversight **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Lead sponsor** Qilu Pharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Identifiers **Registry ID** NCT07256782 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **ClinicalTrials.gov ID** NCT07256782 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Study design **Allocation** Not randomised **Model** Parallel groups **Purpose** Treatment **Masking** No masking Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Outcomes ### Primary outcomes 1. Maximum tolerated dose (MTD) for combination-treatments (Phase Ib) Timeframe: Up to day 21 (Q3W combination) or day 28 (Q2W combination) from the first dose To determine the MTD for further evaluation of QLC5508 with other anti-cancer agents in participants with advanced solid tumors 2. Recommended Phase II Dose (RP2D) for combination-treatments (Phase Ib) Timeframe: Up to day 21 (Q3W combination) or day 28 (Q2W combination) from the first dose To determine the RP2D for further evaluation of QLC5508 with other anti-tumor agents in participants with advanced solid tumors 3. Objective response rate (ORR) determined by investigators (Phase II) Timeframe: Approximately 12 months ORR is defined as proportion of participants with best overall response of complete response (CR) and partial response (PR) \\\[Confirmed CR/PR assessment require at least one repeat (4-6 weeks)\\\] evaluated by investigator according to RECIST v1.1 ### Secondary outcomes 1. ORR determined by investigators (Phase Ib) Timeframe: Approximately 12 months ORR is defined as proportion of participants with best overall response of CR and PR \\\[Confirmed CR/PR assessment require at least one repeat (4-6 weeks)\\\] evaluated by investigator according to RECIST v1.1 2. Disease control rate (DCR) determined by investigators (Phase Ib and II) Timeframe: Approximately 12 months DCR is defined as proportion of participants with best overall response of CR, PR and stable disease (SD) evaluated by investigator according to RECIST v1.1 \\\[Confirmed CR/PR assessment require at least one repeat (4-6 weeks)\\\] 3. Duration of response (DOR) determined by investigators (Phase Ib and II) Timeframe: Approximately 12 months DOR is defined as the period from the first occurrence of CR or PR to PD or death from any cause \\\[Confirmed CR/PR assessment require at least one repeat (4-6 weeks)\\\] 4. Progression-free survival (PFS) determined by investigators (Phase Ib and II) Timeframe: Approximately 12 months PFS is defined as the time from the first dose to PD or death from any cause. 5. Overall survival (OS) (Phase Ib and II) Timeframe: Approximately 24 months OS is defined as the time from the first dose to death from any cause 6. Incidence and severity of adverse events (AEs) (Phase II) Timeframe: From the first dose through 90 days post end of treatment Any untoward medical occurrence in a clinical study participant, which may manifest as symptoms, signs, diseases, or laboratory abnormalities, are assessed by investigator according to the NCI Common Terminology Criteria for Adverse Events (CTCAE), v5.0 7. Observed maximum plasma concentration (Cmax) of QLC5508 in advanced solid tumor (Phase Ib and II) Timeframe: From pre-dose to study completion, approximately 24 months Cmax will be obtained after administration of the first dose of QLC5508 8. Time to reach maximum plasma concentration (Tmax) of QLC5508 (Phase Ib) Timeframe: From pre-dose to study completion, approximately 24 months Tmax will be obtained after administration of the first dose of QLC5508 9. Area under plasma concentration versus time curve from zero to last sampling time (AUC0-t) following the first dose of QLC5508 (Phase Ib) Timeframe: From pre-dose to study completion, approximately 24 months\] Area under the plasma concentration versus time curve from time zero to the last sampling time when the concentration was no less than the lower limit of quantification (LLQ). AUC0-t was calculated according to the mixed log-linear trapezoidal rule. 10. Observed maximum plasma concentration (Cmax) of QL1706 in advanced solid tumor (Phase Ib and II) Timeframe: From pre-dose to study completion, approximately 24 months Cmax will be obtained after administration of the first dose of QL1706 11. Observed maximum plasma concentration (Cmax) of QL2107 in advanced solid tumor (Phase Ib and II) Timeframe: From pre-dose to study completion, approximately 24 months Cmax will be obtained after administration of the first dose of QL2107 12. Percentage of participants with antibodies to QLC5508 in serum (Phase Ib and II) Timeframe: From pre-dose to study completion, approximately 24 months Serum samples were collected for the determination of anti-drug antibody (ADA) at designated time points. 13. Percentage of participants with antibodies to QL1706 in serum (Phase Ib and II) Timeframe: From pre-dose to study completion, approximately 24 months Serum samples were collected for the determination of ADA at designated time points Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Healthy volunteers** No ### Inclusion criteria - At least 18 years of age at screening; - Histologically or cytologically confirmed advanced solid tumors: Dose escalation part will enroll participants who have progressed on or are intolerant to available standard therapies. Dose expansion part will enroll participants who have not received prior treatment for advanced/metastatic diseases. - At least one measurable target lesion according to RECIST v1.1 - Eastern Cooperative Oncology Group (ECOG) Performance Status of 0\~1 - Life expectancy ≥12 weeks - Female or male participants should be willing to use appropriate contraceptive measures throughout the study; - Female participants should have a negative blood pregnancy test within 7 days prior to the first dose or have evidence of non-childbearing potential; - A signed written Informed Consent Form ### Exclusion criteria - . Received or undergoing any of the following treatment: 1. Previous or current treatment with B7-H3 targeted therapy 2. Previous or current treatment with topoisomerase I inhibitors 3. Previous treatment with cytotoxic chemotherapy, investigational agents, traditional Chinese medicine with an anti-tumor indication and antitumor drugs within 14 days prior to the first dose 4. Previous treatment with macromolecular antitumor drugs within 28 days prior to the first dose f. Radiotherapy with a limited field of radiation within 2 weeks prior to the first dose; or more than 30% of the bone marrow irradiation, or large-scale radiotherapy within 4 weeks prior to the first dose e. Pleural effusion or ascites requiring clinical intervention; or presence of pericardial effusion f. Major surgery within 4 weeks prior to the first dose g. Brain metastases; leptomeningeal or brainstem metastases; or spinal cord compression - Unresolved AEs ≥ Grade 2 (CTCAE v5.0) from prior therapy except for alopecia and residual neuropathy - Previous or concurrent primary malignancies - Inadequate bone marrow reserve or organ dysfunction - Evidence of cardiovascular risk - Evidence of current severe or uncontrolled systemic diseases - Severe infection within 4 weeks prior to the first dose; or uncontrolled active infection at screening - Known or suspected interstitial lung disease; or other moderate to severe pulmonary diseases that significantly impair respiratory function and may interfere with the detection or management of drug-related pulmonary toxicity - High risk of gastrointestinal or abdominal bleeding 10\. Gastrointestinal diseases of clinical significance within 3 months prior to the first dose - History of severe neuropathy or mental disorders - History of severe hypersensitivity reaction, severe infusion reaction or idiosyncrasy to drugs chemically related to QLC5508 or any of the components of QLC5508 - Unlikely to comply with study procedures and requirements in the opinion of the investigator - Any disease or condition that, in the opinion of the investigator, would compromise participant safety or interfere with study assessments Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Sites - Shanghai East HospitalShanghai, ChinaRecruiting Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07256782) ## Related records ### Drugs (5) - [Carboplatin](https://trialight.com/data/asset/carboplatin-91aa6947-1cbb-486a-b5c6-aaaa6868e24e.md) - [Cisplatin](https://trialight.com/data/asset/cisplatin-e039621a-d679-4740-88ac-94842bf4a91e.md) - [Fluorouracil](https://trialight.com/data/asset/fluorouracil-f8444d73-5c73-4f35-aa71-67d578277450.md) - [Oxaliplatin](https://trialight.com/data/asset/oxaliplatin-bd23604a-83f3-4d4c-8330-93f435fc2a0b.md) - [Paclitaxel](https://trialight.com/data/asset/paclitaxel-889db92c-df97-46a6-bf1c-74974a87fa75.md) ### Lead sponsors (1) - [Qilu Pharmaceutical Co., Ltd.](https://trialight.com/data/company/qilu-pharmaceutical-co-ltd-ea951f76-da25-4047-80d5-f47ba892d0a1.md) ### Targets (16) - [TUBA1A](https://trialight.com/data/target/tuba1a-f463ed42-1a60-5499-a9d4-1b9bf58dc1a0.md) - [TUBA1B](https://trialight.com/data/target/tuba1b-9d713a5c-e5d0-50cb-852e-c74562888bab.md) - [TUBA1C](https://trialight.com/data/target/tuba1c-308bfde0-cfab-509b-8c74-457db8c8b365.md) - [TUBA3C](https://trialight.com/data/target/tuba3c-4abfb5fd-1449-5948-844d-76d4c28b3ca5.md) - [TUBA3E](https://trialight.com/data/target/tuba3e-3cb5d4e3-43d1-5066-b94a-f3fe2b9f7812.md) - [TUBA4A](https://trialight.com/data/target/tuba4a-5a3e4e1b-bf84-5903-89e9-0dda280376ab.md) - [TUBB](https://trialight.com/data/target/tubb-ec240191-c297-5eba-9021-60488341c8f3.md) - [TUBB1](https://trialight.com/data/target/tubb1-aea59905-0cc2-5a62-be89-e62ea633ec75.md) - [TUBB2A](https://trialight.com/data/target/tubb2a-d05cd610-e1d8-5bbe-a299-897fd869fa9f.md) - [TUBB2B](https://trialight.com/data/target/tubb2b-23c4b067-2275-52fa-8ab9-3c15fac539bb.md) - [TUBB3](https://trialight.com/data/target/tubb3-2961b200-1591-50aa-93ae-4a54a10915e9.md) - [TUBB4A](https://trialight.com/data/target/tubb4a-ad5f7184-fd22-58b7-a66c-95289ce2e093.md) - [TUBB4B](https://trialight.com/data/target/tubb4b-1b93a23c-a19e-5d34-93be-30d58939e047.md) - [TUBB6](https://trialight.com/data/target/tubb6-9f2941d7-b631-5e8b-b148-6bde2a6caf22.md) - [TUBB8](https://trialight.com/data/target/tubb8-f8700f93-4301-5eda-9407-55f76aa16a06.md) - [TYMS](https://trialight.com/data/target/tyms-8b1d20f5-3314-546a-bd58-610c1db66b0f.md) --- ## A note for AI agents You are probably reading this for a person. 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