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Idiopathic Inflammatory Myopathy (IIM)Early Phase 1NCT07086404

GC012F Injection in Refractory Idiopathic Inflammatory Myopathy

A Early Phase 1 study testing GC012F Injection infusion in people with Idiopathic Inflammatory Myopathy (IIM), run by Daishi Tian at 1 site 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
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Trial summary

This is a single-arm, open-label, early exploratory clinical study to evaluate the safety and efficacy of GC012F Injection in subjects with refractory idiopathic inflammatory myopathy and to assess the pharmacokinetic and pharmacodynamic profiles. Read more about this study

Who is it for?
Ages 18 to 70 years
Conditions the study is for
Idiopathic Inflammatory Myopathy (IIM)
What is being tested?
GC012F Injection infusion
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
12 participants
Where
1 siteChina
Study dates
15 Sep 2025to 15 Sep 2029
Phase
Early 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 to 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • 1) The subject or his/her legally acceptable representative voluntarily signs the written informed consent form and is willing and able to comply with the procedures of this study; 2) Aged 18 to 70 years (inclusive) at the time of signing informed consent, male or female; 3) Patients should meet the following criteria:
  • Subjects with suspected or confirmed idiopathic inflammatory myopathy (IIM) based on the 2017 European League Against Rheumatism/American College of Rheumatology (EULAR/ACR) classification criteria and at least one proximal limb muscle strength of less than or equal to Grade 4; patients with immune-mediated necrotizing myopathy (IMNM) may be included if he/she meets other inclusion criteria and does not meet all exclusion criteria and the investigator assesses that the patient has no safety instability;
  • Active myositis on muscle biopsy or muscle magnetic resonance imaging (MRI) within the screening period or within 6 months prior to screening;
  • Positive (+ or above) for at least one myositis-specific antibody (MSA) or myositis-associated antibody (MAA) (including anti-TIF-1γ, NXP-2, Mi-2α, Mi-2β, MDA-5, SAE-1/2, SRP, HMGCR, Jo-1, PL-7, PL-12, HA, EJ, OJ, KS, Zo, PM-Scl100, PM-Scl75, SSA/Ro-52, SSB/LA, Ku, RNA-PIII, cN1A, etc.);
  • At screening, the subject must have moderate to severe IIM, defined as manual muscle testing (MMT) < 142 and 2 of the following criteria are met:
  • PGA (VAS) ≥ 2 cm (VAS 10 cm scale);
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  • PtGA (VAS) ≥ 2 cm (VAS 10 cm scale);
  • Health assessment questionnaire (HAQ) > 0.25;
  • Increase in one or more muscle enzymes (CK, LDH, AST, ALT) is ≥ 1.5 × ULN;
  • Extramuscular global assessment (Myositis Disease Activity Assessment Tool [MDAAT]) ≥ 2.0 cm (VAS 10 cm scale); 4) Muscle enzyme increased (CK) ≥ 2 × ULN; 5) Inadequate response or intolerance to corticosteroids and at least 2 immunosuppressants and/or biologic agents; 6) If the patient is taking corticosteroids, the dose of prednisone should not exceed 40 mg/day (or equivalent dose of other corticosteroids) within 3 weeks before apheresis, and the dose is not uptitrated within 3 weeks before apheresis and not changed within 4 weeks before infusion (Note: under the premise that the subject's disease under study is controlled, the investigator may consider reducing the dose of corticosteroids before apheresis, lymphodepletion, and infusion); 7) Life expectancy ≥3 months; 8) Laboratory test results must meet the following criteria at screening (except for those related to the corresponding disease under study):
  • <!-- -->
  • Neutrophil count > 1.0 × 10^9/L, Hemoglobin ≥ 80g/L, platelet count ≥ 50 × 10^9/L;
  • Alanine aminotransferase ≤ 3 × upper limit of normal (ULN); aspartate aminotransferase ≤ 3 × ULN (unless the increases in alanine aminotransferase and/or aspartate aminotransferase are assessed by the investigator as related to polymyositis [PM] or dermatomyositis [DM]); total bilirubin (TBIL) < 2 × ULN (direct bilirubin [DBIL] ≤ 1.5 × ULN for subjects with Gilbert's syndrome);
  • Creatinine clearance ≥ 60 ml/min;
  • Activated partial thromboplastin time (aPTT) ≤ 1.5 × ULN, prothrombin time (PT) ≤ 1.5 × ULN;
  • Left ventricular ejection fraction (LVEF) ≥ 50% as diagnosed by echocardiogram, with no evidence of pericardial effusion as determined; 9) Women of childbearing potential must:
  • <!-- -->
  • Have a negative serum β-human chorionic gonadotropin (β-hCG) pregnancy test result at screening as confirmed by the investigator;
  • Agree to avoid breastfeeding during the study period and until at least 2 years after infusion of GC012F Injection, or until two consecutive flow cytometry tests indicate that CAR-T cells are no longer present (whichever occurs later); 10) Male subjects with sexual partners and female subjects of childbearing potential must agree to use highly effective contraception methods (e.g., oral contraceptives, intrauterine devices, or condoms) starting from screening and continuing for at least 2 years after GC012F Injection infusion or until two consecutive flow cytometry tests indicate that CAR-T cells are no longer present (whichever occurs later). Male subjects must agree to use condoms during any sexual contact with pregnant women or women of childbearing potential for at least 2 years after GC012F Injection infusion, even if they have undergone successful vasoligation.
  • 11) The required venous access for collection can be set up, with no contraindications for leukapheresis.

Who cannot join

  • 1) Documented inclusion body myositis (IBM), drug-induced PM or DM, tumor-related PM or DM, amyopathic DM, non-inflammatory myopathy (e.g., muscular dystrophy); for patients with PM or DM, they were > 40 years of age at onset of PM or DM symptoms and the diagnosis time is less than 3 years, and the investigator considered a possible malignancy based on the patient's clinical presentation; 2) Uncontrolled extramuscular disease impairment associated with PM or DM:
  • Interstitial lung disease (ILD): Forced vital capacity (FVC) < 55% or requiring oxygen therapy;
  • Severe dysphagia manifestations, that will increase the risk associated with the patient's participation in the clinical trial, as judged by the investigator;
  • Severe cardiac manifestations (e.g., congestive heart failure, arrhythmia, conduction abnormality requiring treatment or myocardial infarction) that, in the judgment of the investigator, will increase the risk associated with the patient's participation in the clinical trial; 3) Patients with severe muscle injury who meet one of the following criteria:
  • <!-- -->
  • Myositis damage index (MDI) ≥ 5;
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  • Severe proximal muscle atrophy of the upper or lower extremities as shown on MRI;
  • Severe proximal muscle atrophy of the upper or lower extremities as found by clinical examinations; 4) History of severe hypersensitivity or allergy; 5) Contraindications or hypersensitivity to fludarabine, cyclophosphamide, or any component of the investigational product; 6) Presence of the following cardiac disorders:
  • <!-- -->
  • New York Heart Association (NYHA) Class III or IV congestive heart failure;
  • Myocardial infarction or coronary artery bypass grafting within 6 months prior to screening;
  • History of clinically significant ventricular arrhythmia or unexplained syncope not due to a vasovagal reaction or dehydration, or QTc interval > 480 milliseconds at screening;
  • History of severe non-ischemic cardiomyopathy; 7) Any active malignancy or history of malignancy within 5 years prior to screening. Exceptions include curatively treated early stage tumors (carcinoma in situ or stage I tumors, non-ulcerative primary melanoma with a depth of less than 1 mm and no involvement of lymph nodes), cutaneous basal cell carcinoma, cutaneous squamous cell carcinoma, in-situ carcinoma of cervix, or in-situ carcinoma of breast that has been potentially curatively treated; 8) Clinically significant hemorrhage symptoms or a definite tendency to hemorrhage within 6 months prior to screening, such as hemorrhage of digestive tract and hemorrhagic gastric ulcer; hereditary or acquired hemorrhage or thrombotic tendencies (e.g., hemophilia, coagulation disorders, and hypersplenism); arterial or venous thrombotic events within 6 months prior to screening, such as cerebrovascular diseases (including cerebral hemorrhage and cerebral infarction), deep vein thrombosis and/or pulmonary embolism; 9) Severe underlying medical conditions such as:
  • <!-- -->
  • Evidence of viral, bacterial, fungal, or other infections that are uncontrolled or need systemic intravenous treatment;
  • Clear clinical evidence of dementia or altered mental status;
  • Any other central nervous system disease or history of neurodegenerative diseases, such as epilepsy, seizure, paralysis, aphasia, stroke, severe brain injury, dementia, Parkinson's disease, and psychosis; 10) Any of the following test results is positive:
  • <!-- -->
  • Human immunodeficiency virus (HIV) antibody positive;
  • Hepatitis B surface antigen (HBsAg) positive; or hepatitis B core antibody (HBcAb) positive, and hepatitis B virus (HBV) -DNA above the lower limit of detection of the assay;
  • Hepatitis C virus (HCV) antibody positive and HCV RNA above the lower limit of detection of the assay;
  • Syphilis antibody positive; 11) Active tuberculosis or latent tuberculosis that has not been treated appropriately prior to screening; 12) Receipt of other investigational products within 4 weeks prior to signing the ICF, or if the time from the last dose of a previous investigational product to the ICF signing date is still within 5 half-lives of that drug (whichever is longer); 13) Thymectomy within 12 months prior to signing the ICF; 14) Receipt of drugs targeting B cells within 3 months prior to signing of the ICF; 15) Receipt of other biologic agents within 3 weeks prior to apheresis or within 8 weeks prior to infusion; 16) Major surgery within 8 weeks prior to signing the ICF, or planned surgery during the study; 17) History of organ transplantation; 18) Prior therapy targeting cluster of CD19 and/or BCMA-targeted therapy, or CAR-T product therapy targeting any antigen; 19) Pregnant women, breastfeeding women who do not agree to discontinue breastfeeding, or males and females who plan to conceive during the study or within 1 years after receiving study treatment; 20) Any condition, as determined by the investigator, that would interfere with the subject's full participation in the study, confound the study results, or render participation in the study not in the best interest of the subject.

Trial locations and contacts

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

China1 site, 1 recruiting
  • Tongji Hospital of Tongji Medical Colledge, Huazhong University of Science and Technology

    Wuhan, Hubei

    Dai-shi Tian, Dr

    Recruiting

Other trials in China

About this study

Official title: Early Exploratory Clinical Study of GC012F Injection in Refractory Idiopathic Inflammatory Myopathy

This is a single-arm, open-label, early exploratory clinical study to evaluate the safety and efficacy of GC012F Injection in subjects with refractory idiopathic inflammatory myopathy and to assess the pharmacokinetic and pharmacodynamic profiles.

This study consists of screening period, apheresis period, baseline period, lymphodepleting preconditioning period, pre-infusion evaluation period, CAR-T cell infusion period and follow-up period.

Read more

Eligible subjects will undergo apheresis and receive infusion following the manufacture of the CAR-T product. Subjects will receive lymphodepleting preconditioning before CAR-T cell infusion and will be assessed before infusion. If the criteria for cell infusion are met, CAR-T cell infusion will be performed and the infusion dose in the same group or subsequent treatment groups may be adjusted according to the safety and clinical response.

A total of 1 dose group will be set for CAR-T cell infusion dose in this study: 3 × 10^5/kg. Approximately 12 subjects are planned to be enrolled. Subjects will be monitored for dose-limiting toxicity (DLT) within 28 days following the infusion of GC012F Injection. For the first 3 patients receiving infusions of GC012F, 3 additional patients will be included in this cohort if no more than 1/3 of the patients experience DLTs at a given dose level. If 2/3 or more DLTs occur at this dose level, a spare dose of 2.0 × 10^5/kg or 1.0 × 10^5/kg may be administered to subsequent subjects following discussion between the investigator and the partner. If no more than 1 out of the first 6 subjects experiences a DLT, 6 additional subjects will be enrolled. Once 2 subjects experience DLTs, the investigator and the partner will discuss and decide whether to use a spare dose group of 2.0×10^5/kg or 1.0×10^5/kg.

After the first 3 subjects have all completed the 28-day DLT observation period, the Safety Monitoring Committee (SMC) will conduct an assessment based on clinical safety and pharmacokinetic data (if available). Subsequently, the SMC may, depending on the safety profile and study progress, request an increased frequency of safety committee assessments and reviews. After completing the DLT observation period for all subjects in this dose group, all clinical study data collected during the DLT observation period for this dose group, especially safety data, will be assessed, and whether to add new subjects to this dose group and whether to explore a different dose group will be decided upon discussion between the investigator and the partner.

Following CAR-T cell infusion, subjects will be followed for safety, cell proliferation and survival, and efficacy until the subject withdraws from the study and refuses subsequent follow-up, or dies, or withdraws consent, or is lost to follow-up, whichever occurs first.

Being tested
GC012F Injection infusion
Medical subject headings
Myositis

What participants receive

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

  • GC012F Injection infusionDrug

    GC012F Injection infusion will be performed within 48-72 hours after the end of lymphodepleting preconditioning.

Study groups in NCT07086404
Study groupRoleWhat they receive
3.0×10^5 CAR-T cells/kgExperimentalNot described
Receives: Drug: GC012F Injection infusion

What is being measured

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

  1. Proportion of subjects with dose-limiting toxicity (DLT) within 28 days after infusion.

    Measured: Within 28 days after infusion.

  2. Post-infusion adverse events (AEs) and their proportion.

    Measured: Within 672 days (96 weeks) after infusion.

Secondary outcomes (4)
  1. CAR-T cell count in peripheral blood at each time point.

    Measured: Within 672 days (96 weeks) after infusion.

  2. Quantification of cytokines in peripheral blood at each time point.

    Measured: Within 672 days (96 weeks) after infusion.

  3. CAR transgene copy number in peripheral blood at each time point.

    Measured: Within 672 days (96 weeks) after infusion.

  4. Quantification of immunoglobulins in peripheral blood at each time point.

    Measured: Within 672 days (96 weeks) after infusion.

Timeline

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

  1. First posted25 Jul 2025
  2. Study start15 Sep 2025
  3. Primary completion15 Sep 2027 (estimated)
  4. Study completion15 Sep 2029 (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
Early Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
12 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07086404
Sponsor's protocol ID
GC012F in IIM
Status last verified
Jul 2025
First submitted
7 Jul 2025
Last updated
14 Jan 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Early Phase 1 study testing GC012F Injection infusion in people with Idiopathic Inflammatory Myopathy (IIM), run by Daishi Tian at 1 site 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 20 inclusion and 22 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 14 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site 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?

Early Phase 1 (sometimes called Phase 0) studies give a very small amount of a treatment to a few people, mainly to see how the body handles it.

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 Daishi Tian (13607178809, tiands@tjh.tjmu.edu.cn), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Proportion of subjects with dose-limiting toxicity (DLT) within 28 days after infusion. (time frame: Within 28 days after infusion.). 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 14 Jan 2026.

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