Trial of Erythrocyte Encapsulated Thymidine Phosphorylase In Mitochondrial Neurogastrointestinal Encephalomyopathy

Summary

The purpose of this study is to determine the safety, tolerability, action and effectiveness of repeated doses of Erythrocyte Encapsulated Thymidine Phosphorylase (EE-TP) for the treatment of patients with Mitochondrial Neurogastrointestinal Encephalomyopathy (MNGIE). MNGIE is a rare inherited disease that mainly affects the digestive and nervous system and is caused by a defect in the function of an enzyme called thymidine phosphorylase. This loss of function causes certain molecules (thymidine and deoxyuridine) to accumulate in cells which leads to toxic damage to these cells. The disease can be confirmed by detecting variations (mutations) in the thymidine phosphorylase gene (TYMP). Currently there are no specific treatments for patients with MNGIE, whose effectiveness has been shown through clinical trials. The potential treatment for MNGIE offered in this trial is an enzyme replacement therapy, i.e. replacing functional thymidine phosphorylase. This treatment uses the patients own red blood cells in which thymidine phosphorylase is encapsulated to produce EE-TP (the study drug). EE-TP is created using a machine named a Red Cell Loader (RCL) and is then administered back to the patient.

Timeline

Start

2024-11

Primary completion

2027-09

Completion

2027-12

Outcome

Outcome not reported

Stopped: “Change of circumstances with Commercial partner”

Publications

• Results Moran NF, Bain MD, Muqit MM, Bax BE. Carrier erythrocyte entrapped thymidine phosphorylase therapy for MNGIE. Neurology. 2008 Aug 26;71(9):686-8. doi: 10.1212/01.wnl.0000324602.97205.ab. No abstract available.
• Results Bax BE, Bain MD, Scarpelli M, Filosto M, Tonin P, Moran N. Clinical and biochemical improvements in a patient with MNGIE following enzyme replacement. Neurology. 2013 Oct 1;81(14):1269-71. doi: 10.1212/WNL.0b013e3182a6cb4b. Epub 2013 Aug 21.
• Results Bourgeaux V, Lanao JM, Bax BE, Godfrin Y. Drug-loaded erythrocytes: on the road toward marketing approval. Drug Des Devel Ther. 2016 Feb 11;10:665-76. doi: 10.2147/DDDT.S96470. eCollection 2016.
• Results Pacitti D, Levene M, Garone C, Nirmalananthan N, Bax BE. Mitochondrial Neurogastrointestinal Encephalomyopathy: Into the Fourth Decade, What We Have Learned So Far. Front Genet. 2018 Dec 21;9:669. doi: 10.3389/fgene.2018.00669. eCollection 2018.

Drugs

Indications