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Locally Advanced Unresectable or Metastatic Solid TumorsPhase 1CSG-1906-101NCT05857332

SG1906 for CLDN18.2-Positive Solid Tumors

A Phase 1 study testing SG1906 in people with Locally Advanced Unresectable or Metastatic Solid Tumors, run by Hangzhou Sumgen Biotech Co., Ltd. at 9 sites in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This is a Phase Ia/Ib Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SG1906 in Patients with CLDN18.2-Positive Locally Advanced Unresectable or Metastatic Solid Tumors. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
SG1906
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
60 participants
Where
9 sitesChina
Study dates
30 May 2023to 30 Aug 2027
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients must meet all the following criteria to be eligible for participation in this study:
  • Understand and voluntarily sign the informed consent form (ICF).
  • Age ≥18 years.
  • Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1.
  • Expected survival time of ≥3 months.
  • Able to provide tumor tissue samples for CLDN18.2 detection.
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  • Specific requirements for patients enrolled in Phase Ia and Phase Ib are as follows:
  • Phase Ia Dose Escalation Phase
  • Patients with CLDN18.2-positive histologically or cytologically confirmed locally advanced unresectable or metastatic solid tumor who have relapsed after standard therapy, have failed standard therapy, are intolerant to standard therapy, are not eligible for standard therapy, or refuse standard therapy.
  • CLDN18.2 positivity is defined as H score ≥1 by central laboratory immunohistochemistry.
  • Phase Ib Dose Expansion Stage
  • Patients with histologically or cytologically confirmed CLDN18.2-positive locally advanced unresectable or metastatic G/GEJ adenocarcinoma or pancreatic cancer who have failed to respond to standard therapy, have relapsed after standard therapy, or are intolerant to standard therapy.
  • CLDN18.2 positivity is defined as H score ≥40 by central laboratory immunohistochemistry.
  • At least one evaluable lesion (refer to Response Evaluation Criteria in Solid Tumors, version 1.1 [RECIST 1.1]).
  • Adequate function of vital organs, defined as follows:
  • Bone marrow function (no transfusion, erythropoietin, granulocyte colony-stimulating factor, or other medically supportive therapy within 7 days prior to the first dose): neutrophil count ≥1.5 × 109/L, platelet count ≥100 × 109/L, and hemoglobin level ≥10.0 g/dL.
  • Adequate liver function, which must meet all of the following criteria:
  • Serum total bilirubin ≤1.5 × upper limit of normal (ULN).
  • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 × ULN (AST and ALT ≤5 × ULN in patients with liver metastases).
  • Albumin ≥3.0 g/L.
  • Renal function: serum creatinine ≤1.5 × ULN or endogenous creatinine clearance ≥50 mL/min (Cockcroft-Gault formula).
  • Coagulation: international normalized ratio ≤1.5 × ULN or prothrombin time ≤1.5 × ULN, activated partial thromboplastin time ≤1.5 × ULN without receiving anticoagulation therapy.
  • Toxicity caused by prior anti-tumor therapy recovered to Grade 0 to 1 (CTCAE 5.0), except for alopecia, Grade ≤2 sensory neuropathy, lymphocytopenia, and endocrine disorders controlled with hormone replacement therapy.
  • Female patients of childbearing potential and male patients whose female partners are of childbearing potential need to use at least one approved contraceptive (e.g., intrauterine device, pill, or condom) during study treatment and for at least 6 months (180 days) after the last dose; female patients of childbearing potential must have a negative blood human chorionic gonadotropin (HCG) test within 7 days prior to dosing and must not be lactating.
  • Male patients must refrain from donating sperm from the time the ICF is signed until at least 6 months after the last dose.

Who cannot join

  • Patients who meet any of the following criteria cannot be enrolled:
  • Presence of active central nervous system metastatic lesions; presence of metastases to the brainstem or meninges, spinal cord metastases or compression. Exception: patients with previously treated brain metastases (e.g., surgery, radiation therapy) who are clinically stable for at least 4 weeks after treatment (calculated from the first dose of investigational drug) and have discontinued corticosteroids for ≥14 days prior to the administration of investigational drug; patients with untreated, asymptomatic brain metastases (i.e., no neurological symptoms, no need for corticosteroids, brain metastases ≤1.5 cm in length, no significant edema around the brain metastases).
  • Active autoimmune disease requiring systemic therapy within the past 2 years (e.g., use of immunomodulatory drugs, corticosteroids, or immunosuppressive medications); related replacement therapy is allowed (e.g., thyroid hormone, insulin, or physiologic corticosteroid replacement for renal or pituitary insufficiency).
  • Pyloric obstruction or any other condition that can cause long-term chronic nausea, persistent recurrent vomiting (≥3 vomit episodes in 24 hours) or diarrhea.
  • Patients who have recently developed gastrointestinal bleeding (i.e., a history of hematemesis, hematochezia, or melena within the past 3 months) without evidence of recovery confirmed by endoscopy or colonoscopy; or patients with evidence of risk of gastric bleeding.
  • Patients with active gastrointestinal disease including, but not limited to, gastric or duodenal ulcers, acute gastric or intestinal perforation, acute necrotizing pancreatitis, ulcerative enteritis, congenital megacolon or Crohn's disease.
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  • Patients requiring long-term treatment with non-steroidal anti-inflammatory drugs (NSAIDs); patients who are using anticoagulants such as heparin at therapeutic doses or vitamin K antagonists (except for prophylaxis).
  • Presence of body fluid (hydrothorax, ascites, pericardial effusion, etc.) requiring local treatment or repeated drainage.
  • Unintentional weight loss ≥5% within 1 month prior to initial dose, even with peripheral or central intravenous nutritional support.
  • History of hemolytic anemia from any cause (including Evans syndrome).
  • History of defects in red blood cell production, hemoglobin production, or metabolism, such as glucose-6-phosphate dehydrogenase deficiency, thalassemia, sickle cell disease, and hereditary spherocytosis.
  • History of hemophagocytic lymphohistiocytosis.
  • Presence of active infection requiring antibiotic therapy within 2 weeks prior to the first dose, except for prophylaxis.
  • Presence of cardiovascular system disease within 6 months prior to screening that meets any of the following:
  • Cardiac function: congestive heart failure of New York Heart Association (NYHA) class III or IV; left ventricular ejection fraction <50%.
  • Clinically significant cardiac disease or surgery within 6 months prior to the first dose of the investigational drug, including myocardial infarction, unstable angina pectoris, cerebrovascular accident, coronary/peripheral artery bypass, etc.
  • QTcF (corrected QT interval with Fridericia formula) >450 ms in men and >470 ms in women; history of clinically significant ventricular arrhythmias (e.g., sustained ventricular tachycardia, ventricular fibrillation, tip-twist ventricular tachycardia); history or family history of congenital long QT syndrome; arrhythmias requiring antiarrhythmic drug therapy (patients with atrial fibrillation with controllable heart rate 1 month prior to the first dose of the investigational drug may be enrolled).
  • History of arterial thrombosis, deep venous thrombosis and pulmonary embolism within 6 months prior to the first dose.
  • Hypertension (systolic blood pressure ≥150 mmHg and/or diastolic blood pressure ≥90 mmHg) that has not been effectively controlled after treatment with standardized antihypertensive medication.
  • Patients with active hepatitis B or C. In case of positive hepatitis B surface antigen (HBsAg) or positive hepatitis B core antibody (HBcAb) during the screening period, further hepatitis B virus (HBV) DNA titer testing must be performed (HBV DNA≤200 IU/mL is required). Patients who are positive for hepatitis C virus (HCV) must receive further HCV RNA testing (no higher than the upper limit of the detection value at their study site); patients may be enrolled in the study only after active hepatitis B or C requiring treatment has been excluded.
  • Known history of human immunodeficiency virus (HIV) infection (i.e., HIV antibody positive);
  • Known history of Grade 3 to 4 hypersensitivity reactions to any biological product, history of life threatening hypersensitivity reactions, or known hypersensitivity to components of SG1906 drug product (Grade ≥3 hypersensitivity reactions).
  • Have received any of the following treatments or procedures:
  • Prior treatment with any antitumor therapy targeting CLDN18.2 or CD47
  • Patients who have undergone open surgery ≤3 months prior to the first dose (except for surgeries for the purpose of biopsy).
  • Prior allogeneic organ grafting.
  • Systemic anticancer therapy (including chemotherapy, targeted therapy, hormonal therapy and immunotherapy) within 28 days or 5 drug half-lives (whichever is shorter) prior to the first dose of the investigational drug, and all AEs have not returned to grade ≤1 (CTCAE 5.0), except for alopecia.
  • Radiotherapy ≤14 days prior to the first dose of the investigational drug; palliative radiotherapy is allowed if it is completed within 2 weeks prior to the enrollment in the study and radiotherapy-related toxicity has recovered to grade ≤1 (CTCAE 5.0), except for alopecia
  • Any live vaccine within 4 weeks prior to the first dose of the investigational drug
  • Have received treatment with various growth factors, blood transfusions or other blood products for anemia or decreased platelet count within 14 days prior to the first dose of the investigational drug.
  • Have received systemic corticosteroids (at a dose equivalent to >10 mg/day prednisone) or other immunosuppressive drugs within 14 days prior to the first dose. The following are permitted:
  • Topical or inhaled glucocorticoids in physiologic replacement doses are allowed
  • The use of short-course (≤7 days) corticosteroids at physiologic replacement doses for the prevention or treatment of non-autoimmune diseases is allowed.
  • Any other condition that, in the opinion of the Investigator, may lead to inappropriate participation in this study.

Trial locations and contacts

9 sites in 1 country. Contact the study team or a site near you to ask about taking part.

9 sites in 1 country

China9 sites, 9 recruiting
  • Chinese PLA General Hospital

    Beijing, Beijing Municipality, 100039

    Jianming XU

    Recruiting
  • The Sixth Affiliated Hospital, Sun Yat-sen University

    Guangzhou, Guangdong, 510655

    Yanhong Deng

    Recruiting
  • The First Affiliated Hospital, Zhejiang University School of Medicine

    Hangzhou, Zhejiang, 310003

    Jian Ruan

    Recruiting
  • The Second Affiliated Hospital Zhejiang University School of Medicine

    Hangzhou, Zhejiang, 310009

    Ying Yuan

    Recruiting
  • The First Hospital of China Medical University

    Shenyang, Liaoning, 110002

    Zhenning WANG

    Funan LIU

    Recruiting
  • Liaoning Cancer Hospital

    Shenyang, Liaoning, 110801

    Jingdong ZHANG

    Recruiting
  • Shanxi Cancer Hospital

    Taiyuan, Shanxi, 030013

    Yusheng WANG

    Recruiting
  • The First Affiliated Hospital Of Xiamen University

    Xiamen, Fujian

    Xin Zhao, 361003

    Recruiting
  • Henan Cancer Hospital

    Zhengzhou, Henan, 450003

    Jufeng Wang

    Recruiting

Other trials in China

About this study

Official title: A Phase Ia/Ib Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SG1906 in Patients With CLDN18.2-Positive Locally Advanced Unresectable or Metastatic Solid Tumors.

This is a Phase Ia/Ib Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SG1906 in Patients with CLDN18.2-Positive Locally Advanced Unresectable or Metastatic Solid Tumors.

Read the detailed description

After a screening period of up to 28 days for each study phase, qualified patients will be enrolled to receive their assigned dose of SG1906, administered every 2 weeks (Q2W), until disease progression or intolerable toxicity, starting of a new anticancer treatment, withdrawal of consent, lost to follow up, death, or end of the study, whichever occurs first.

Phase Ia: Dose-escalation Stage The study population in Phase Ia includes patients with CLDN18.2-positive histologically or cytologically confirmed locally advanced unresectable or metastatic solid tumor who have relapsed after standard therapy, have failed standard therapy, are intolerant to standard therapy, are not eligible for standard therapy, or refuse standard therapy. Phase Ib: Dose-expansion Stage The study population in this phase will include patients with histologically or cytologically confirmed CLDN18.2-positive locally advanced unresectable or metastatic G/GEJ cancer or PC who have failed to respond to standard therapy, have relapsed after standard therapy, or are intolerant to standard therapy; and who have disease progression as confirmed by the Investigator or documented by medical history.

Being tested
SG1906

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • SG1906Drug

    Phase 1a will use an accelerated titration-Bayesian optimal interval (AT-BOIN) design with 7 dose cohorts: 0.1 mg/kg, 0.3 mg/kg, 1 mg/kg, 3 mg/kg, 6 mg/kg, 9 mg/kg, and 12 mg/kg by IV infusion. Accelerated titration (i.e., 1 patient each) will be applied to the first 2 cohorts.

Study groups in NCT05857332
Study groupRoleWhat they receive
SG1906ExperimentalSG1906 monotherapy intravenous (IV) infusion - Biweekly doses
Receives: Drug: SG1906

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of Treatment-Emergent Adverse Events

    Number and percentage of AE which is calculated by worst CTCAE grade by CTCAE 5.0

    Measured: Through study completion, an average of one year

  2. MTD/MAD/ RP2D

    To determine the maximum tolerated dose (MTD) or maximum administered dose (MAD) for intravenous (IV) administration of SG1906 in patients with CLDN18.2-positive locally advanced unresectable or metastatic solid tumors.; To preliminarily determine the recommended Phase 2 dose (RP2D) of SG1906 given intravenously in patients with CLDN18.2-positive locally advanced unresectable or metastatic solid tumors.

    Measured: Through study completion, an average of one year

Secondary outcomes (6)
  1. Pharmacokinetics (PK): AUC

    The area under the curve (AUC) of serum concentration of the drug after the administration.

    Measured: Through study completion, an average of one year

  2. Pharmacokinetics (PK): Cmax

    Cmax to maximum drug concentration.

    Measured: Through study completion, an average of one year

  3. Pharmacokinetics (PK):limination half-life (T1/2)

    limination half-life (T1/2) of the drug after administration.

    Measured: Through study completion, an average of one year

  4. receptor occupancy (RO)

    receptor occupancy (RO) of CD47 on the surface of peripheral blood cells;

    Measured: Through study completion, an average of one year

  5. Immunogenicity endpoints:

    levels of anti-drug antibodies (ADAs) and neutralizing antibodies (tested in ADA-positive samples only).

    Measured: Through study completion, an average of one year

  6. Efficacy endpoints:

    objective response rate (ORR).

    Measured: Through study completion, an average of one year

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 May 2023
  2. Study start30 May 2023
  3. Primary completion28 Feb 2027 (estimated)
  4. Study completion30 Aug 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
60 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05857332
Sponsor's protocol ID
CSG-1906-101
Acronym
CSG-1906-101
Status last verified
Aug 2026
First submitted
23 Apr 2023
Last updated
11 Aug 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing SG1906 in people with Locally Advanced Unresectable or Metastatic Solid Tumors, run by Hangzhou Sumgen Biotech Co., Ltd. at 9 sites in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 25 inclusion and 34 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 11 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 9 sites in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Pengyu Shi (+86 010 56315401, shipengyu@sumgenbio.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Treatment-Emergent Adverse Events (time frame: Through study completion, an average of one year). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 Aug 2026.

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