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Bacteria engineered to starve tumors enters human trials

NCT ID NCT05038150

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Aug 28, 2026 · Updated 3 times

Summary

This early-phase trial is testing a modified salmonella bacteria, called SGN1, in 70 people with advanced solid tumors that have not responded to standard treatments. The bacteria are designed to grow inside tumors and release an enzyme that breaks down methionine, an amino acid tumors need to survive. The main goals are to check safety and see if the treatment can shrink tumors or slow their growth.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Modified Salmonella Typhimurium SGN1 (a bacteria engineered to deliver an enzyme that breaks down methionine, an amino acid tumors need to grow)
What this could lead to
If it works, this could point toward a new treatment option for people with advanced solid tumors that have stopped responding to other therapies.
What could go wrong
This is an early phase 1/2 trial with only 70 participants, so it is too soon to know if it is safe or effective. The bacteria may cause serious side effects, and the approach may not shrink tumors.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 70 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2023

Expected to finish

Aug 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 75 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria Patients must meet all the following inclusion criteria: 1. Age 18-75 years inclusive of end value, regardless of gender. 2. Part 1: Patients with advanced stage (unresectable or metastatic) cancer including but not limited to small cell lung cancer, non-small cell lung cancer (adeno- and squamous), Hodgkin's lymphoma or non-Hodgkin's lymphoma, sarcoma, cervical carcinoma, melanoma, head and neck cancer, breast cancer, ovarian cancer, pseudomyxoma peritoneum (Pseudomyxoma peritonei, PMP) and hepatocellular carcinoma characterized by failure of standard treatment (disease progression or intolerance, such as chemotherapy, targeted therapy, and other immunotherapies) or patients who have no standard treatment or patients who are intolerant to the standard treatment. Part 3: The specific tumor-type expansion study may enroll the following patients: Patients with hepatocellular carcinoma, small cell lung cancer (SCLC), non small cell lung cancer (NSCLC), pancreatic cancer, prostate cancer, bladder cancer, nasopharyngeal carcinoma, sarcoma, melanoma or other tumor type with potential efficacy signal observed in Part 1\&2, who have failed to standard therapy or who are intolerant to the standard treatment. There will be 2-4 cohorts of dose expansion in specified tumor types. Note: For all tumor species included, standard treatment will refer to current CSCO/NCCN guidelines. Standard treatment failure refers to patients who have disease progression after CSCO/NCCN guidelines recommended existing standard care, or relapse/metastasis after standard care. Nonstandard treatment refers to patients who have received the treatment recommended by the guidelines and currently have no other effective treatment options. 3. Patients finished anti-tumor therapy including chemotherapy, immunotherapy, biological agents, hormone therapy, radiotherapy (except local radiotherapy for pain relief) ≥ 4 weeks prior to the first dose of study drug. 4. At least 1 measurable lesion according to RECIST 1.1 (for solid tumors). 5. Patients have recovered from any toxic reaction to previous medications (≤Grade 1 based on NCI-CTCAE v 5.0, except a. Hair loss; b. Pigmentation; c. The long-term toxicity caused by radiotherapy and cannot be recovered by the investigator's judgment; d. Platinum induced neurotoxicity of grade 2 and below; e. Hemoglobin at 90 \~ 100 g / L (including boundary value)) or stable status assessed by the investigator. 6. Eastern Co-Operative Oncology Group (ECOG) performance status 0 \~ 1 and a life expectancy of at least 3 months. 7. Laboratory tests must meet the following requirements and have not received any blood cell growth factor 14 days before the test (Patients with laboratory values outside of the specified ranges will be permitted to be retested in order to meet the criteria): 1. absolute count of neutrophils (ANC) ≥1.5×109 /L, platelet ≥75×109 /L; Hemoglobin ≥90 g/L; 2. serum albumin ≥30g /L; Bilirubin ≤1.5 × Upper Limit of Normal (ULN), ALT and AST ≤2.5 × ULN; 3. In patients with liver metastasis,ALT and AST≤5 × ULN; 4. Creatinine clearance ≥50 mL/min (standard Cockcroft -Gault formula) or Cr ≤1.5 ×ULN: urinary protein≤ 2+ or urinary protein quantitative \<1.0 g/L; 5. International standardized ratio of coagulation function (INR) ≤1.5 × ULN, activated partial thromboplastin time (APTT) ≤1.5 × ULN (If patient has concomitant medication with anticoagulants, whether the coagulation function is qualified will be determined by Investigator.) 8. If female, be either postmenopausal for at least 1 year with documented follicle stimulating hormone (FSH) \> 30 IU/L, or surgically sterile for at least 3 months, or if a woman of childbearing potential, must be non-pregnant confirmed by blood and urine pregnancy tests, and non-lactating. 9. Female patients of childbearing potential must agree to use acceptable method(s) of contraception from consent through at least 6 months after last dose of drug infusion. 10. Male patients of reproductive capacity must agree to use effective contraception from start of mobilization through at least 6 months after last dose of drug infusion. 11. Patients with chronic HBV infection with active disease who meet the criteria for anti HBV therapy (HBV DNA test is less than 2000 IU/ml) should be on a suppressive antiviral therapy prior to initiation of cancer therapy. Patients with a history of HCV infection should have completed curative antiviral treatment and HCV viral load below the limit of quantification. Patients with HCV Ab positive but HCV RNA negative due to prior treatment or natural resolution are eligible. Patients on concurrent HCV treatment should have HCV below the limit of quantification. 12. Patients must be able to follow up after the treatment. 13. Patients must understand and voluntarily sign the informed consent form. Exclusion Criteria Patients will be excluded from participation for any of the following criteria: 1. Received systemic or absorbable dosage of steroid hormone (prednisone or equivalent) of \> 10 mg/day in the 14 days prior to enrollment; 1. Prednisone \> 10 mg/day 2. Dexamethasone \> 1.5 mg/day. 2. Allergic or intolerant to salmonella sensitive antibiotics, or combined with infectious diseases and currently using antibiotics. 3. Present assessable tumors in hollow organs (Stomach, esophagus, intestine, urinary tract etc.). 4. Present with symptomatic central nervous system metastasis or brain abscess at screening. 5. Present with diverticulitis or conditions at screening that might promote the unintentional growth of anaerobic bacteria in non target lesions. 6. Existing cardiac clinical symptoms or diseases that cannot be well controlled, such as: 1. NYHA grade 2 or above heart failure; 2. Unstable angina pectoris; 3. Myocardial infarction occurred within 1 year; 4. Patients with supraventricular or ventricular arrhythmias that have clinical significance and need treatment or intervention; 5. Uncontrolled hypertension (systolic blood pressure) ≥160 mmHg and (diastolic blood pressure) ≥100 mmHg after drug treatment; 6. Patients with valvular heart disease or mitral valve prolapse, aortic valve disease or other source of turbulent cardiac blood flow. 7. Those who had received radiotherapy, chemotherapy, hormone therapy, surgery or molecular targeted therapy that ended fewer than 4 weeks before the first dose of study treatment (if nitrosourea or mitomycin chemotherapy, the interval between end of chemotherapy and first dose of study treatment must be no less than 6 weeks). 8. Patients with active or uncontrolled infection or fever, \> 38.5℃, of unknown cause during screening or before the first administration of the study drug (according to the judgment of the researcher, fever caused by tumor can be included). 9. Positive for the presence of human immunodeficiency virus-1 (HIV-1) or human immunodeficiency virus-2 (HIV-2) (positive antigen/antibody and nucleic acid tests); or follow standard of care for HIV diagnosis. 10. Patients with Anti-TP positive. 11. Patients participating in other clinical studies or participating in other clinical studies within 4 weeks (or 5 half-lives of other study drugs), whichever is longer, prior to enrollment and receiving experimental drug administration. 12. Vaccination within 28 days of the first trial treatment, except for administration of inactivated vaccines and RNA vaccines (e.g., inactivated influenza vaccines and COVID-19 RNA vaccines). 13. Received live or attenuated vaccines within 4 weeks of study drug administration, during treatment, or within 5 months of the last administration. 14. In the judgment of the investigator, there are other factors that may lead to termination: for example, adrenal cortex insufficiency, pituitary insufficiency after treatment, and other serious diseases (including 14.mental diseases) need to be treated together, there are serious abnormalities in laboratory examination, family or social factors, which may affect the safety of the patients or test data and sample collection. 15. In the researcher's judgment, patients who are not suitable for other reasons. 16. Documented salmonella infections within 6 months. 17. Abdominal standing position plain film or abdominal CT indicates the possibility of bowel obstruction within 6 months from screening, or the Investigator believes there is a risk of bowel obstruction. 18. Patients with implants such as pacemakers, prosthetic cardiac valves, or metal orthopedic prostheses (not include vascular implants for Part 3).

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    7 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Banner MD Anderson Cancer Center

    SUSPENDED

    Gilbert, Arizona, 85234, United States

  • Barbara Ann Karmanos Cancer Hospital dba Karmanos Cancer Center

    WITHDRAWN

    Detroit, Michigan, 48201, United States

  • Guangdong Clifford Hospital

    RECRUITING

    Guangzhou, Guangdong, 511495, China

  • Harbin Medical University Cancer Hospital

    RECRUITING

    Harbin, Heilongjiang, 150081, China

  • Health Chao Family Comprehensive Cancer Center

    SUSPENDED

    Orange, California, 92868, United States

  • Shanghai Jiao Tong University Affiliated Sixth People's Hospital

    RECRUITING

    Shanghai, Shanghai Municipality, 200233, China

  • University of Cincinnati Cancer Center

    SUSPENDED

    Cincinnati, Ohio, 45267, United States

  • West China Hospital of Sichuan University

    RECRUITING

    Chengdu, Sichuan, 610041, China

More trials for these conditions

Other studies related to the condition(s) this trial covers.