--- title: Replace lost dopamine producing neurons nct_id: NCT06608355 phase: PHASE1 status: RECRUITING sponsor: iRegene Therapeutics Co., Ltd. study_type: INTERVENTIONAL canonical_url: "https://parkinsonspathways.com/trial/NCT06608355" clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT06608355" last_fetched: "2026-05-10T14:06:43.816Z" source: "Parkinson's Pathways (curated)" --- # Replace lost dopamine producing neurons **Goal (in five words):** Replace lost dopamine producing neurons **Official Title:** A Phase I Study to Assess the Safety, Tolerability and Preliminary Efficacy of NouvNeu001 Injection in the Treatment of Early-onset Parkinson's Disease **Trial ID:** [NCT06608355](https://clinicaltrials.gov/study/NCT06608355) ## Key Facts - **Phase:** PHASE1 - **Status:** RECRUITING - **Study Type:** INTERVENTIONAL - **Sponsor:** iRegene Therapeutics Co., Ltd. - **Target Enrollment:** 6 participants - **Start Date:** 2024-08-23 - **Completion Date:** 2026-04 - **Conditions:** Early-onset Parkinson's Disease - **Interventions:** Human Dopaminergic Progenitor Cells - **Intervention Types:** BIOLOGICAL ## Summary For Families The goal is to see if a one-time neurosurgical transplantation of human dopaminergic progenitor cells can safely replace lost dopamine-producing cells and improve motor symptoms in people with early-onset Parkinson's, while monitoring for side effects and any early signs of benefit. The approach injects lab-grown dopaminergic precursor cells into the brain so they can mature into dopamine neurons and release dopamine, potentially smoothing movement problems and lowering dependence on levodopa; participants must show they respond to levodopa on an acute challenge. Eligible volunteers are adults 18 to 70 whose Parkinson's began at age 50 or younger, who are Hoehn-Yahr stage 2 to 4 off medication, have MDS-UPDRS-III scores over 30 off meds, and are medically fit for brain surgery. People with atypical parkinsonism, prior certain brain surgeries, active infections or serious medical or psychiatric conditions, recent stem-cell or infusion therapies, or who cannot commit to two years of contraception after treatment are excluded. ## Eligibility - **Minimum age:** 18 Years - **Maximum age:** 70 Years - **Sex:** ALL ### Full Criteria ``` Inclusion Criteria: * Age 18-70 years old, male or female * Able to understand the rationale of the clinical trial and sign informed consent form (ICF) * Diagnosis of Early-onset Parkinson's Disease in accordance with the MDS clinical diagnostic criteria for Parkinson's disease, and the age of onset was ≤50 years old * Medically suitable for neurosurgery under anesthesia and able to participate in Computed Tomography (CT)/Magnetic Resonance Imaging (MRI) scan. * Hoehn-Yahr staging for "off" episodes is 2 to 4 * The MDS-UPDRS-III score in the "off" state \>30, and positive for the Acute Levodopa Challenge Test (ALCT) * Acceptable laboratory test results during screening and prior to transplantation Exclusion Criteria: * Atypical Parkinsonism * Patients who have had previous pallidotomy, striatal or extrapyramidal surgery or other brain surgery; as well as other surgical procedures that are judged by the investigator to affect patient's participation in this study; Patients with surgical contraindications or other neurosurgical contraindications * Patients who have a previous head CT/MRI examination showing cerebral trauma, vascular malformation, hydrocephalus, brain tumor, etc., and patients who have brain imaging abnormalities in the striatum or other brain areas leading to a significantly increased risk for surgery * Patients with a history of severe cardiovascular and cerebrovascular diseases * Patients with a history of malignant tumors * Patients who have received stem cell therapy for Parkinson's disease within 2 years before signing the ICF * Patients with active disseminated intravascular coagulation and significant hemorrhagic tendency within 3 months prior to screening, or who cannot temporarily suspend anti-platelet agents or other anti-coagulant medications for at least 5 days before surgery * Patients with long-term, heavy use of glucocorticoids or immunosuppressive drugs within 3 months prior to signing the ICF * Patients with a history of mental illness who are deemed unfit to participate in the study by the investigator; or a history of suicidal ideation or suicide attempts within the past year or currently * Patients who have used botulinum toxin within 6 months prior to signing the ICF * Patients with active epilepsy or currently on anti-epileptic drugs * Patients with a history of dementia or severe cognitive disorder, or the score of MDS-UPDRS 1.1 during screening is \> 3; poor compliance, inability to accurately keep diary, and/or inability to sign ICF due to dementia * Patients with severe depression or with severe anxiety * Patients with the following abnormalities during screening, including: Abnormal coagulation; Abnormal immunological tests, and assessed by the investigator it is not suitable to participate in the trial; Hypertensive patients with poorly controlled blood pressure and patients with severe postural hypotension; Diabetic patients with poorly controlled blood glucose * Patients with other combined severe systemic diseases, such as pulmonary heart disease, moderate to severe asthma, severe chronic obstructive pulmonary disease (COPD) * Presence of one of the following: positive for human immunodeficiency virus (HIV) antibody, treponema pallidum antibody, hepatitis C virus (HCV) antibody and HCV RNA; Hepatitis B virus (HBV) surface antigen positive and HBV DNA copy number \> detection of normal values; Tuberculosis is in the active stage; Other active infections that the investigator believes may affect Patients' participation in the study or affect study outcomes * Patients with alcohol addiction or positive for drug of abuse testing * Patients with a history of contraindication or allergy to the drugs used during the study or any of its components, or are allergic to the same drugs or other macrolides, or have allergies * Female of childbearing potential who are not surgically sterilized/premenopausal/unwilling to use medically approved effective contraception with 2 years after administration of investigational drug and lactating women; men who are not surgically sterilized/unwilling to use medically approved effective contraception with 2 years after administration of investigational drug * Patients who have received electric shock therapy within 30 days prior to surgery * Patients who are participating in other clinical trials, or have been enrolled in other clinical studies and received intervention therapy within 3 months prior to the surgery * Patients with poor compliance based on clinical evaluation of the investigator * Patients who are being treated with drugs such as apomorphine, or levodopa/carbidopa infusion therapy * Patients with severe dyskinesia in both on- and off-drug states ``` ## Locations (1) - Tongji Hospital Affiliated to Tongji Medical College Hust, Wuhan, Hubei, China _(30.5833, 114.2667)_ - Wei Wang — (CONTACT) — 027-83663337 — wwang@vip.126.com - Xiang Luo — (CONTACT) — 027-83663337 — flydottjh@163.com - Wei Wang — (CONTACT) - Xiang Luo — (CONTACT) - Huaqiu Zhang — (CONTACT) ## Central Contacts - Meng Cai — (CONTACT) — 86-027-59338180 — caimeng@iregene.com --- *Canonical: https://parkinsonspathways.com/trial/NCT06608355* *HTML version: https://parkinsonspathways.com/trial/NCT06608355* *Source data: https://clinicaltrials.gov/study/NCT06608355*