ClinicalTrials.gov record NCT07603050
A Phase I/II Clinical Study to Evaluate the Safety and Efficacy of VGN-R08b in Patients With Type III Gaucher's Disease
A Phase I/II Clinical Study to Evaluate the Tolerance, Safety and Efficacy of VGN-R08b Intracerebroventricular Injection in Patients With Type III Gaucher's Disease
AI summaryWhat this study is about, in plain languageShow ▾Hide ▴
AI-written from the registry record, not the study's own wording. May contain errors or omissions. Check the registry text on this page and the original record ↗ before acting on it.
This open-label Phase I/II study evaluates VGN-R08b given by intracerebroventricular injection in children and adolescents with Type III Gaucher disease. It uses a dose-escalation stage (three planned dose levels) followed by a small dose-expansion, with up to 12 participants. Participants will be followed for safety, laboratory, and neurologic measures for up to five years.
What it is studying. The study is testing the tolerance, safety, and efficacy of VGN-R08b delivered by intracerebroventricular injection in people with Type III Gaucher disease, and will measure biochemical and neurologic effects and immune responses.
What the researchers hope to learn. To evaluate tolerance, safety, and efficacy of intracerebroventricular VGN-R08b and to measure changes in GCase activity, Lyso-GL1 levels, eye-movement and ataxia measures, viral shedding, and immunogenicity.
What this study is about
The study's own summary, as published on ClinicalTrials.gov. Underlined terms have a short explanation.
A phase I/II clinical study to evaluate the tolerance, safety and efficacy of VGN-R08b intracerebroventricular injection in patients with type III Gaucher's disease
Interventions being studied
Being studied in this trial does not mean the treatment or procedure is approved or available for this condition.
- Drug
- VGN-R08b
Eligibility
The criteria exactly as listed on ClinicalTrials.gov. Only the study team can say whether they apply to you.
Inclusion criteria
- The signing of the informed consent form should be completed when the subject is at least 2 years old but less than 18 years old.
- The subject has a documented medical history of Gaucher disease confirmed by GCase enzyme activity testing, and has a double GBA1 gene mutation.
- According to the investigator's assessment, the neurological signs and/or symptoms are consistent with type III Gaucher disease.
- At the time of enrollment, the subject has horizontal eye movement disorders (including gaze paralysis, or delayed or absent saccades), but there is no severe motor dysfunction resulting in bedridden status.
- The subject is currently receiving substrate reduction therapy (SRT) and/or high-dose ambroxol for Gaucher disease treatment. The subject is required to have been on stable treatment for at least 2 months before enrollment and the investigator determines that the treatment is ineffective for neurological symptoms, or is willing to discontinue the treatment at the time of enrollment (discontinuation 1 week before administration).
- The subject is currently receiving and willing to continue stable peripheral treatment (including imiglucerase or other ERT, or SRT), and the peripheral symptoms of Gaucher disease are stable at the time of screening, that is, all of the following conditions are met: hemoglobin level ≥ 11.0 g/dL (female) or ≥ 12.0 g/dL (male), platelet count ≥ 100×109/L, spleen volume < 10 times the normal value (MN), liver volume < 1.5 MN, and no bone crisis or asymptomatic bone disease (such as bone necrosis and/or pathological fractures causing bone pain) within 3 months before screening.
- (Applicable) Male and female subjects with reproductive potential must continue to use an effective contraceptive method (including abstinence) correctly from the screening period until at least 1 year after the start of treatment, and not donate sperm or eggs.
- The subject (applicable) and their parents/guardians must understand the trial information, purpose and risks described in the informed consent form, and authorize the use of the subject's health information and provide an informed consent form with the signature and date of signing.
- The subject (applicable) and their parents/guardians are willing to participate in the study as information providers, providing the subject's health status, cognition and physical ability (including providing information for rating scales).
Exclusion criteria
- There are other serious neurological disorders that may cause symptoms of Gaucher disease or interfere with the research objectives;
- There are severe internal organ damages caused by Gaucher disease, which, after evaluation by the researchers, are considered to pose unacceptable risks to the subjects, or interfere with the subjects' research compliance, or interfere with the execution of the trial;
- Long-term ventilation or long-term nasogastric feeding (long-term ventilation is defined as: requiring tracheotomy for respiratory assistance, or continuous 14 days or more of non-invasive respiratory assistance for ≥ 16 hours per day, excluding acute reversible diseases that require assisted ventilation and perioperative ventilation. Long-term nasogastric feeding refers to the use of a nasogastric tube for feeding due to severe loss of swallowing function);
- There are severe immunodeficiencies or autoimmune diseases;
- There is active infection (including viral infections such as HIV, HBV, HCV or syphilis);
- The following medication and treatment situations exist:
- Currently using drugs, herbs, or over-the-counter medications that have strong inhibitory or inducing effects on CYP3A4 or P-gp;
- Having received bone marrow or organ transplantation, or any gene or cell therapy;
- Having undergone immunization (live vaccines) within 4 weeks;
- Undergoing systemic immunosuppressive therapy or corticosteroid therapy other than that required by the protocol (local preparations for skin diseases can be used);
Study description and what participation involves
The study's detailed description, as published on ClinicalTrials.gov.
Detailed description from the registry
This is an open-label, dose-escalation clinical trial, consisting of dose escalation and dose expansion. A total of 12 subjects are expected to be enrolled. Dose escalation: Initially, three doses of 6×10\^10 vg/g, 1.2×10\^11 vg/g, and 1.8×10\^11 vg/g (per unit brain weight) are planned to be explored . Three subjects will be enrolled in each dose group. The second and third subjects in the same dose group must be confirmed to be safe and tolerable after at least a 4-week safety assessment of the first subject before receiving the drug. For the high-dose group (1.8×10\^11 vg/g), subjects will be enrolled one by one. Dose expansion: After the dose escalation is completed, the SRC will comprehensively evaluate the data on efficacy, safety, and immunogenicity, etc., to select the optimal effective dose and expand the enrollment by 3 cases.
AI summaryWhat participation may involve, in plain languageShow ▾Hide ▴
AI-written from the registry record, not the study's own wording. May contain errors or omissions. Check the registry text on this page and the original record ↗ before acting on it.
Participants receive an intracerebroventricular injection of VGN‑R08b at a study‑determined dose (the trial uses dose escalation with possible dose expansion). They will have regular safety checks (vital signs, physical exams, lab tests) and monitoring for adverse events with follow‑up visits extending up to 5 years. Expected study procedures include collection of blood and cerebrospinal fluid (spinal tap) for enzyme, biomarker and antibody testing, samples of urine/feces/nasal secretions to check for viral vector shedding, eye‑movement testing (electrooculogram), and ataxia rating scales. Some participants may need to stop or continue certain Gaucher therapies per the study entry rules and will be asked to complete questionnaires and provide health information during follow‑up.
How the study is structured. Interventional, non-randomized, single-group, open-label Phase I/II trial with dose escalation and dose expansion. Three dose groups are planned with three subjects per dose during escalation; later a small expansion adds three more subjects at the selected dose. Participants receive VGN-R08b by intracerebroventricular injection and are monitored for adverse events, laboratory changes, neurologic function, viral vector shedding, and immunogenicity for up to five years.
Questions you could ask
These questions are suggestions for a conversation with the study team or your own clinician, not advice.
- This is an early-phase study, mainly about safety and dose. What is already known about this treatment?
- The registry says recruitment has not started. When is it expected to open, and can I register interest now?
- No sites are listed on the registry yet. Where will the study take place?
- Which of the eligibility criteria would need to be checked with tests before I could join?
More on Gaucher disease
Important dates
- Study start
- May 14, 2026 (estimated)
- Primary completion
- May 29, 2028 (estimated)
- Study completion
- Aug 16, 2032 (estimated)
- Target enrollment
- 12 participants (estimated)
- Last updated on registry
- May 22, 2026
- Data verified
- Oct 10, 2026
Sponsor and research team
The lead sponsor funds and oversees the trial. A pharmaceutical or biotech company sponsor typically means the study is testing that company's drug or device; a hospital, university, or government agency usually indicates investigator-initiated or publicly funded research.
- Lead sponsor
- Shanghai Vitalgen BioPharma Co., Ltd.
Participating sites
Study locations have not been posted on ClinicalTrials.gov yet. This study is not yet recruiting, so sites may be added when recruitment begins.
Terms used on this page · explanations by MedicalUpdates.ai
- intracerebroventricular
- Given directly into the fluid-filled spaces (ventricles) inside the brain, usually through an implanted catheter or reservoir.
- informed consent form
- The process of explaining a study, including its risks and what participation involves, so that a person can decide freely whether to take part. Consent is usually documented in writing, and a participant can choose to leave the study later.
- enrollment
- The number of participants a study plans to include, or has included. 'Estimated' means the planned number; 'actual' means the number who joined.
- before screening
- The checks done before enrolment to see whether a person qualifies, such as tests, scans or a review of medical history.
- immunosuppressive
- A medicine that reduces the activity of the immune system. Studies of autoimmune conditions often require a stable dose, a prior failure, or a washout of such medicines.
- corticosteroid
- Steroid medicines, such as prednisone, that reduce inflammation. Studies often require a stable dose at entry or measure whether the study treatment allows the dose to be reduced.
- Inclusion Criteria
- The conditions a person must meet to be considered for the study, for example a confirmed diagnosis, an age range or a test result.
- Exclusion Criteria
- The conditions that rule a person out even if they meet the inclusion criteria, for example other illnesses, certain medicines or pregnancy.
- open-label
- No masking is used, so the assigned intervention is not deliberately hidden from participants or study staff.
- dose-escalation
- Groups of participants receive increasing doses of a treatment, one group after another, to find a dose that can be given safely.
The study record on this page is reproduced from ClinicalTrials.gov, a database of the U.S. National Library of Medicine, where it was submitted by the study sponsor. MedicalUpdates.ai does not own this content, is not affiliated with or endorsed by ClinicalTrials.gov, NIH, or the U.S. Government, and does not verify the record. Plain-language notes, the glossary and the questions above are added by this site; text in the boxes marked "AI summary" was written by an AI model and may contain errors. Registry records change over time. Check the original record for the current version and discuss eligibility or participation with a qualified healthcare professional.
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