Clinical Trials of Benmelstobart Injection Combined With Anlotinib Hydrochloride Capsules in the Treatment of Advanced or Unresectable Alveolar Soft Part Sarcoma

April 17, 2026 updated by: Chia Tai Tianqing Pharmaceutical Group Co., Ltd.

To Evaluate the Single-arm, Multi-center Phase II Clinical Trial of Benmelstobart Injection Combined With Anlotinib Hydrochloride Capsules in the Treatment of Advanced or Unresectable Alveolar Soft Part Sarcoma

This is a Phase II, single-arm, multicenter clinical study aimed at demonstrating the effectiveness of benmelstobart injection combined with anlotinib hydrochloride capsules in patients aged 14 years or older with advanced or unresectable alveolar soft part sarcoma by evaluating the objective response rate (IRC).

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

33

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100142
        • Recruiting
        • Beijing Cancer Hospital
        • Contact:
    • Chongqing Municipality
      • Chongqing, Chongqing Municipality, China, 400038
        • Not yet recruiting
        • The First Affiliated Hospital of Army Medical University of the People's Liberation Army of China
        • Contact:
    • Guangdong
      • Guangdong, Guangdong, China, 510060
        • Not yet recruiting
        • Sun Yat-Sen University Cancer Center
        • Contact:
    • Heilongjiang
      • Harbin, Heilongjiang, China, 150081
        • Not yet recruiting
        • Harbin Medical University Cancer Hospital
        • Contact:
    • Henan
      • Zhengzhou, Henan, China, 450000
        • Not yet recruiting
        • Henan Cancer Hospital
        • Contact:
    • Hubei
      • Wuhan, Hubei, China, 430000
        • Not yet recruiting
        • Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
        • Contact:
    • Hunan
      • Changsha, Hunan, China, 410008
        • Not yet recruiting
        • Xiangya Hospital of Central South University
        • Contact:
    • Jilin
      • Changchun, Jilin, China, 130021
        • Not yet recruiting
        • The First Hospital of Jilin University
        • Contact:
    • Shandong
      • Jinan, Shandong, China, 250117
        • Not yet recruiting
        • Shandong First Medical University Affiliated Tumor Hospital
        • Contact:
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200080
        • Not yet recruiting
        • Shanghai General Hospital
        • Contact:
    • Sichuan
      • Chengdu, Sichuan, China, 610041
        • Not yet recruiting
        • West China Hospital of Sichuan University
        • Contact:
    • Tianjin Municipality
      • Tianjin, Tianjin Municipality, China, 300060
        • Not yet recruiting
        • Tianjin Medical University Cancer Institute & Hospital
        • Contact:
    • Xinjiang
      • Ürümqi, Xinjiang, China, 830000
        • Not yet recruiting
        • Xinjiang Medical University Affiliated Cancer Hospital
        • Contact:
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310022
        • Not yet recruiting
        • Zhejiang Cancer Hospital
        • Contact:
      • Hangzhou, Zhejiang, China, 310009
        • Not yet recruiting
        • The Second Affiliated Hospital, Zhejiang University School of Medicine.
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Only when all the following criteria are met will the subjects be eligible for inclusion in this study:

    1. The subjects voluntarily join this study, sign the informed consent form, and have good compliance;
    2. ≥14 years old (calculated from the date of signing the informed consent form);
    3. Eastern Cooperative Oncology Group Performance Status (ECOG) score of 0 to 1;
    4. Expected survival greater than 12 weeks;
    5. Pathologically confirmed recurrent and/or metastatic or unresectable alveolar soft part sarcoma, without previous systemic treatment;
    6. Confirmed to have at least one measurable lesion according to RECIST 1.1;

    7. Laboratory tests meet the following standards:

      1. Hemoglobin (HGB) ≥ 90g/L;
      2. Absolute neutrophil count (NEUT) ≥ 1.5×109/L;
      3. Platelet count (PLT) ≥ 100×109/L.
      4. Total bilirubin (TBIL) ≤ 1.5 times the upper limit of normal (ULN);
      5. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2.5 ULN. If there is liver metastasis, ALT and AST ≤ 5 ULN;
      6. Serum creatinine (CR) ≤ 1.5 ULN or creatinine clearance rate (CCR) ≥ 60ml/min;
      7. Prothrombin time (PT), activated partial thromboplastin time (APTT), and international normalized ratio (INR) ≤ 1.5×ULN (if not receiving anticoagulant therapy);
      8. Thyroid stimulating hormone (TSH) ≤ ULN; if abnormal, T3 and T4 levels should be examined. If T3 and T4 levels are normal, the subject can be included.
    8. Women of childbearing age must agree to use effective contraceptive measures during the study and for 6 months after the study, and have a negative serum test within 7 days before study enrollment; men must agree to use effective contraceptive measures during the study and for 6 months after the study.

Exclusion Criteria:

  • Any subject meeting any of the following criteria will be excluded from this trial:

    1. Having had or currently having another malignant tumor within 5 years before the first administration of the drug. The following two situations are eligible for inclusion: other malignant tumors treated with a single surgery and achieving a disease-free survival (DFS) of at least 5 consecutive years; cured cervical carcinoma in situ, non-melanoma skin cancer, and superficial bladder tumors [Ta (non-invasive tumor), Tis (carcinoma in situ), and T1 (tumor invading the basement membrane)].
    2. Having diseases that affect intravenous injection or blood collection, or having multiple factors that affect oral medication (such as inability to swallow, chronic diarrhea, and intestinal obstruction, etc.).
    3. Adverse reactions from previous treatments have not recovered to a Common Terminology Criteria for Adverse Events (CTCAE) v5.0 grade score of ≤1, except for grade 2 alopecia, grade 2 peripheral neuropathy, grade 2 anemia, non-clinically significant and asymptomatic laboratory abnormalities, and stable hypothyroidism treated with hormone replacement therapy, which are judged by the investigator to have no safety risks.
    4. Having undergone major surgery, significant traumatic injury, or expected to undergo major surgery during the study period within 4 weeks before the first administration of the drug (except for surgeries specified in the protocol), or having long-term unhealed wounds or fractures. (Major surgery is defined as: surgeries classified as grade 3 or above in the 2023 version of the surgical classification directory of the participating center).
    5. Having experienced any bleeding or hemorrhagic event ≥ CTCAE grade 3 within 4 weeks before the first administration of the drug.
    6. Having experienced an arterial or venous thrombotic event within 6 months before the first administration of the drug, such as cerebrovascular accident (including transient ischemic attack), deep vein thrombosis, and pulmonary embolism.
    7. Active viral hepatitis that is not well controlled. Subjects meeting the following requirements can be screened: HBsAg-positive subjects must have Hepatitis B Virus (HBV) DNA quantification < 2000 IU/ml (or 1*104 copies/ml) or have received at least 1 week of antiviral treatment for HBV before the start of the study and have a 10-fold (1 log value) or greater reduction in viral index, and be willing to receive antiviral treatment throughout the study; HCV-infected subjects (HCV Ab or HCV RNA positive): judged by the investigator to be in a stable state or receiving antiviral treatment at the time of enrollment and continuing to receive approved antiviral treatment during the study.
    8. Active syphilis infection requiring treatment.
    9. Having active tuberculosis, a history of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonia, radiation pneumonitis requiring treatment, or active pneumonia with clinical symptoms.
    10. Having a history of substance abuse of psychotropic drugs and being unable to quit or having a mental disorder.
    11. Preparing for or having previously received allogeneic bone marrow transplantation or solid organ transplantation.

    12. Having major cardiovascular diseases, including any of the following conditions:

      1. Cardiac insufficiency of New York Heart Association Functional Classification (NYHA) class II or above or echocardiography showing left ventricular ejection fraction (LVEF) < 50%;
      2. History of clinically significant ventricular arrhythmias (such as sustained ventricular tachycardia, ventricular fibrillation, torsades de pointes ventricular tachycardia) or arrhythmias requiring continuous antiarrhythmic drug treatment;
      3. Unstable angina pectoris;
      4. Myocardial infarction within 12 months;
      5. Fridericia-corrected QT interval (QTcF) > 450 milliseconds (msec) for men and > 470 msec for women (if QTc is abnormal, it can be continuously measured three times with an interval of more than 2 minutes, and the average value is taken);
      6. History or family history of congenital long QT syndrome. 7) A history of deep vein thrombosis, pulmonary embolism or any other serious thromboembolic event within 3 months prior to randomization (implantable venous access ports or catheter-related thrombosis, or superficial venous thrombosis are not considered "serious" thromboembolic events);
      7. Currently using or having used within 7 days prior to the start of study treatment aspirin (>325 mg/day (maximum antiplatelet dose)), dipyridamole, ticlopidine, clopidogrel, or cilostazol;
    13. Active or uncontrolled severe infection (≥CTC AE grade 2 infection);
    14. Renal failure requiring hemodialysis or peritoneal dialysis;
    15. History of immunodeficiency, including HIV positivity or other acquired or congenital immunodeficiency diseases;
    16. Subjects who need to use immunosuppressants, systemic or absorbable local hormones for immunosuppression purposes and will continue to do so within 7 days before the first administration (except for glucocorticoids at a daily dose of <10 mg prednisone or other equivalent efficacy hormones);
    17. Patients with epilepsy requiring treatment;

    18. Tumor-related symptoms and treatment:

      1. Having received treatment with traditional Chinese patent medicines with clear anti-tumor indications in the National Medical Products Administration (NMPA)-approved drug instructions (including Compound Cantharidin Capsules, Kang'ai Injection, Kanglaite Capsules/Injection, Aidi Injection, Brucea javanica Oil Injection/Capsules, Xiaoaiping Tablets/Injection, Chan Su Capsules, etc.) within 2 weeks prior to the start of study treatment;
      2. Having received previous treatment with immune checkpoint inhibitors targeting PD-1, PD-L1, or Cytotoxic T-Lymphocyte-Associated Antigen 4 (CTLA-4);
      3. Having previously used anti-angiogenic drugs such as bevacizumab, anlotinib, apatinib, lenvatinib, sorafenib, sunitinib, regorafenib, or fruquintinib;
      4. Having received treatment with drugs with immunomodulatory functions (such as interleukin-2, thymosin, polysaccharides from Lentinus edodes, etc.) within 30 days prior to the start of treatment;
      5. Not having recovered from the toxicity and/or complications of previous interventions to CTCAE ≤ grade 1, except for alopecia and peripheral neuropathy ≤ grade 2. ；
      6. Imaging studies (CT or MRI) show that the tumor has invaded major blood vessels or the investigator deems that the tumor is highly likely to invade major blood vessels and cause fatal hemorrhage during the subsequent study period;
      7. Uncontrolled pleural effusion, pericardial effusion or moderate to severe ascites (as judged by the investigator) that requires repeated drainage;
      8. Known to have spinal cord compression, carcinomatous meningitis, brain metastases with symptoms or symptoms controlled for less than 4 weeks.
    19. Known to be allergic to the excipients of the study drug.
    20. Participants who have taken part in and used other anti-tumor clinical trial drugs within 4 weeks before the first administration of the study drug.
    21. As judged by the investigator, there are serious conditions that endanger the safety of the participant or affect the participant's completion of the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Benmelstobart injection+Anlotinib Hydrochloride Capsules
Benmelstobart injection combined with Anlotinib hydrochloride capsules, with a 21-day cycle.
Drug: Benmelstobart injection combined with Anlotinib hydrochloride capsule
Benmelstobart is a PD-L1 immunosuppressant. Anlotinib hydrochloride is a muti-target tyrosine kinase inhibitor.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Objective response rate (IRC assessment)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The proportion of patients with tumor volume reduction reaching 30% is usually the sum of the proportions of complete response (CR) and partial response (PR). (IRC Assessment)
The period from baseline to the end of the trial is expected to be 32 months.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Disease control rate (IRC assessment)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The proportion of cases that achieved remission (CR+PR) and disease stability (SD) after treatment, that is, the proportion of patients who did not experience disease progression (PD). (IRC Assessment)
The period from baseline to the end of the trial is expected to be 32 months.
Duration of remission (IRC assessment)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The duration from the first significant shrinkage of the tumor to its subsequent enlargement/progression (IRC assessment)
The period from baseline to the end of the trial is expected to be 32 months.
Progression-free survival (IRC assessment)
Time Frame: The period from baseline to the end of the trial is expected to be 32months.
From the time of random initiation to the occurrence of a predetermined event, an event may include death, disease progression, change to chemotherapy, change to chemotherapy, addition of other treatments, occurrence of fatal or intolerable side effects, etc.(IRC assessment)
The period from baseline to the end of the trial is expected to be 32months.
12-month progression-free survival rate (IRC assessment)
Time Frame: From baseline to 12 months after treatment
The proportion of subjects whose condition did not deteriorate or progress from the start of treatment to 12 months (IRC assessment)
From baseline to 12 months after treatment
24-month progression-free survival rate (IRC assessment)
Time Frame: From baseline to 24 months after treatment
The proportion of subjects whose condition did not deteriorate or progress from the start of treatment to 24 months (IRC assessment)
From baseline to 24 months after treatment
36-month progression-free survival rate (IRC assessment)
Time Frame: From baseline to 36 months after treatment
The proportion of subjects whose condition did not deteriorate or progress from the start of treatment to 36 months (IRC assessment)
From baseline to 36 months after treatment
Objective response rate (Researcher Evaluation)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The proportion of patients with tumor volume reduction reaching 30% is usually the sum of the proportions of complete response (CR) and partial response (PR). (Researcher Evaluation)
The period from baseline to the end of the trial is expected to be 32 months.
Disease control rate(Researcher Evaluation)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The proportion of cases that achieved remission (CR+PR) and disease stability (SD) after treatment, that is, the proportion of patients who did not experience disease progression (PD). (Researcher Evaluation)
The period from baseline to the end of the trial is expected to be 32 months.
Duration of remission(Researcher Evaluation)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The duration from the first significant shrinkage of the tumor to its subsequent enlargement/progression(Researcher Evaluation)
The period from baseline to the end of the trial is expected to be 32 months.
Progression-free survival (Researcher Evaluation)
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
The time from the start of treatment to disease progression or death for any reason (Researcher Evaluation)
The period from baseline to the end of the trial is expected to be 32 months.
The 12-month progression-free survival rate(Researcher Evaluation)
Time Frame: From baseline to 12 months after treatment
The proportion of subjects whose condition did not deteriorate or progress from the start of treatment to 12 months (Researcher Evaluation)
From baseline to 12 months after treatment
24-month progression-free survival rate(Researcher Evaluation)
Time Frame: From baseline to 24 months after treatment
The proportion of subjects whose condition did not deteriorate or progress from the start of treatment to 24 months (Researcher Evaluation)
From baseline to 24 months after treatment
36-month progression-free survival rate (Researcher Evaluation)
Time Frame: From baseline to 36 months after treatment
The proportion of subjects whose conditions did not deteriorate or progress from the start of treatment to 36 months(Researcher Evaluation)
From baseline to 36 months after treatment
Overall survival
Time Frame: Baseline to death (estimated 48 months)
The time of death from the start of treatment to any cause of death.
Baseline to death (estimated 48 months)
Numbers of subject with the incidence and severity of adverse events (AE) and serious adverse events (SAE), as well as abnormal laboratory test indicators
Time Frame: The period from baseline to the end of the trial is expected to be 32 months.
Numbers of subject with the incidence and severity of adverse events (AE) and serious adverse events (SAE) that occurred during the trial, as well as abnormal laboratory test indicators
The period from baseline to the end of the trial is expected to be 32 months.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Chia Tai Tianqing Pharmaceutical Group Co., Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 2, 2026

Primary Completion (Estimated)

November 1, 2027

Study Completion (Estimated)

November 1, 2028

Study Registration Dates

First Submitted

April 17, 2026

First Submitted That Met QC Criteria

April 17, 2026

First Posted (Actual)

April 23, 2026

Study Record Updates

Last Update Posted (Actual)

April 23, 2026

Last Update Submitted That Met QC Criteria

April 17, 2026

Last Verified

November 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • TQB2450-ALTN-II-04

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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