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Published on: October 4, 2021
Observations on an Open-Label Phase 1/2 Dopamine Gene Therapy Trial (OXB-102/Axo-Lenti-PD) in People with Parkinson's
Simon Rowe1, Amy Evans2, Saeed Kayhanian2,3
1Faculty of Medicine and Health, University of New South Wales, Sydney, Australia.
Background:
SUNRISE-PD was a dose-escalating, phase 1/2 study investigating a second-generation lentiviral vector gene therapy delivering the genes for dopamine synthesis (OXB-102) to treat Parkinson's disease (PD). The trial was prematurely terminated due to insolvency of the sponsor.
Objectives:
The aim was to provide an investigator-led description of the clinical course for the 6 patients enrolled in the OXB-102 trial.
Methods:
Individual patient data were extracted, compiled, and summarized from investigator records.
Results:
Six patients received a low (n = 2) and a higher (n = 4) dose of the OXB-102 gene therapy. There were eight serious adverse events (SAE), of which only one was considered definitely related to the intervention. All SAEs were transient and resolved without sequelae. Efficacy data were limited, but some stabilization of motor function was observed in most of the patients.
Conclusion:
This novel dopamine gene therapy appears safe in patients with moderate-to-severe PD, with some possible stabilizing effects on their clinical course. © 2026 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
Insights
This Parkinson's disease (PD) gene therapy trial (OXB-102) showed promising safety and potential motor function stabilization in patients. Though terminated early, the study offers insights into novel dopamine gene therapy for PD.
Area of Science:
- Neurology
- Gene Therapy
- Parkinson's Disease Research
Background:
- SUNRISE-PD investigated OXB-102, a novel lentiviral vector gene therapy for Parkinson's disease (PD).
- The phase 1/2 trial was dose-escalating but prematurely halted due to sponsor insolvency.
- This report focuses on the clinical course of 6 enrolled patients.
Purpose of the Study:
- To provide an investigator-led clinical description of patients in the OXB-102 gene therapy trial.
- To summarize the safety and potential efficacy of OXB-102 in Parkinson's disease.
Main Methods:
- Retrospective analysis of individual patient data.
- Data compilation and summarization from investigator records.
- Assessment of serious adverse events (SAEs) and clinical outcomes.
Main Results:
- Six patients received either a low (n=2) or higher (n=4) dose of OXB-102 gene therapy.
- Eight serious adverse events (SAEs) occurred; only one was definitively linked to the intervention.
- All SAEs were transient and resolved without lasting effects; motor function showed some stabilization in most patients.
Conclusions:
- The novel dopamine gene therapy (OXB-102) demonstrated a favorable safety profile in moderate-to-severe Parkinson's disease patients.
- Preliminary data suggest potential stabilizing effects of OXB-102 on the clinical progression of PD.
- Further investigation is warranted to confirm the therapeutic potential of this gene therapy approach.
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