CS5007 in people with advanced solid tumors
Official title: A Phase I, Dose-Escalation and Dose-Expansion Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Anti Tumor Activities of CS5007, a Novel EGFR and HER3 Bispecific Antibody-Drug Conjugate, in Participants With Advanced Solid Tumors
Run by CStone Pharmaceuticals · NCT07622524 · Data updated 2026-11-12
This first-in-human study tests CS5007 as a single treatment to see if it is safe and tolerable in adults with unresectable advanced solid tumors and a measurable lesion.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 310 (estimated) |
| Sponsor | CStone Pharmaceuticals Industry-sponsored |
| Locations | 7 sites (Darlinghurst, New South Wales and 6 other locations) |
| Status | Recruiting |
| Started | July 16, 2026 |
| Main results expected | January 2028 |
| Study ends | January 2029 |
| Registry record updated | August 14, 2026 |
| Trial ID | NCT07622524 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults (≥18) with unresectable advanced solid tumors, at least one measurable lesion, ECOG 0-1, adequate organ function, and consent to participate.
✕Probably not a fit
Patients without measurable disease changes, intolerable safety issues, or where CS5007 does not reach therapeutic exposure may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is an open-label, multicenter Phase I trial of CS5007 given as monotherapy to adults with unresectable advanced solid tumors. The study uses a Phase Ia dose-escalation to identify a safe dose, followed by a Phase Ib dose-expansion to look for early signs of anti-tumor activity. Primary aims include safety, tolerability, and pharmacokinetics, with preliminary assessment of efficacy. Eligibility requires measurable disease, good performance status, adequate organ function, and life expectancy of at least three months. The trial is sponsored by CStone Pharmaceuticals with sites in Australia.
Why it matters
Potential benefit: If successful, CS5007 could establish a safe dose and show early activity signals that justify further development for solid tumors.
How similar studies have gone: Phase I studies of similar bispecific antibody-drug conjugates have shown manageable safety and preliminary activity in advanced tumors, though CS5007 is being tested in a first-in-human setting.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Evidence of a personally signed and dated informed consent document. * Willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures. * Being ≥ 18 years of age on the day of signing informed consent. * Pathologically or cytologically confirmed, unresectable advanced solid tumors. * Participants must have at least one measurable lesion according to RECIST Version1.1. * Eastern Cooperative Oncology Group (ECOG) Performance Score of 0 or 1. * Adequate organ function. * Life expectancy ≥ 3 months. * Fertile men and women of childbearing potential must agree to use an effective method of birth control from providing signed consent and for 180 days after the last study drug administration Exclusion Criteria: * Has disease that is suitable for local treatment administered with curative intent. * Has a history of a second malignancy active within the previous 3 years except for locally curable cancers that have been apparently cured. * Known primary central nervous system (CNS) tumor or solid tumor CNS metastasis that is symptomatic, untreated, or requires therapy. * Has life-threatening bleeding event or severe bleeding within 3 months prior to first dose. * Has uncontrolled pleural effusion, pericardial effusion, or ascites. * Has immune deficient disease or received systemic immunosuppressive treatment. * Has intestinal obstruction,or history of inflammatory bowel disease,or chronic diarrhea. * Has history of (non-infectious) interstitial lung disease/pneumonitis that required steroids. * Has active infections requiring systemic therapy. * Has significant cardiovascular disease or cerebrovascular accident within specified timeframes prior to first dose. * Insufficient washout from prior anti-tumor therapy. * Received live vaccine within 28 days prior to first dose. * History of allogeneic organ or hematopoietic stem cell transplantation. * History of hypersensitivity to excipients of study drug or any monoclonal antibody. * Any toxic effects of prior therapy unresolved to Grade ≤1. * Active alcohol or drug abuse. * Pregnant or breastfeeding women. * Other acute or chronic medical or psychiatric conditions that may increase risk or interfere with study results, in the investigator's judgment.
Where it's running
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Macquarie University
North Ryde, New South Wales, Australia Recruiting -
Calvary Mater Newcastle
Waratah, New South Wales, Australia Recruiting -
Icon Cancer Centre South Brisbane
South Brisbane, Queensland, Australia Recruiting -
Linear Clinical Research Ltd
Nedlands, Western Australia, Australia Recruiting -
St Vincent's Hospital Sydney
Darlinghurst, New South Wales, Australia Not yet recruiting -
St Vincent's Hospital Melbourne
Fitzroy, Victoria, Australia Not yet recruiting
Show 1 more location
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Shanghai Chest Hospital
Shanghai, Shanghai Municipality, China Not yet recruiting
Study contacts
- Study coordinator: Sean Yao
- Email: yaosheng@cstonepharma.com
- Phone: +86 18616365940
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.