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Published on: November 4, 2018
Genetic Therapy Approaches for Ornithine Transcarbamylase Deficiency
Berna Seker Yilmaz1, Paul Gissen1,2,3
1Genetics and Genomic Medicine Department, Great Ormond Street Institute of Child Health, University College London, London WC1N 1EH, UK.
Abstract:
Ornithine transcarbamylase deficiency (OTCD) is the most common urea cycle disorder with high unmet needs, as current dietary and medical treatments may not be sufficient to prevent hyperammonemic episodes, which can cause death or neurological sequelae. To date, liver transplantation is the only curative choice but is not widely available due to donor shortage, the need for life-long immunosuppression and technical challenges. A field of research that has shown a great deal of promise recently is gene therapy, and OTCD has been an essential candidate for different gene therapy modalities, including AAV gene addition, mRNA therapy and genome editing. This review will first summarise the main steps towards clinical translation, highlighting the benefits and challenges of each gene therapy approach, then focus on current clinical trials and finally outline future directions for the development of gene therapy for OTCD.
Insights
Ornithine transcarbamylase deficiency (OTCD) gene therapy shows promise for treating this rare urea cycle disorder. This review explores AAV gene addition, mRNA therapy, and genome editing approaches for clinical translation.
Area of Science:
- Biochemistry
- Genetics
- Medical Research
Background:
- Ornithine transcarbamylase deficiency (OTCD) is the most prevalent urea cycle disorder.
- Current treatments for OTCD are insufficient, leading to severe hyperammonemic episodes and potential neurological damage or death.
- Liver transplantation offers a cure but faces limitations like donor scarcity and lifelong immunosuppression.
Purpose of the Study:
- To review the progress of gene therapy for OTCD.
- To highlight the benefits and challenges of various gene therapy modalities.
- To discuss current clinical trials and future directions for OTCD gene therapy.
Main Methods:
- Review of current literature on gene therapy for OTCD.
- Analysis of different gene therapy approaches: AAV gene addition, mRNA therapy, and genome editing.
- Examination of clinical trial data and future research avenues.
Main Results:
- Gene therapy presents a promising alternative to current OTCD treatments.
- Each gene therapy modality (AAV, mRNA, genome editing) has unique advantages and hurdles for clinical application.
- Ongoing clinical trials are evaluating the safety and efficacy of these novel therapies.
Conclusions:
- Gene therapy holds significant potential to address the unmet needs in OTCD treatment.
- Further research and clinical trials are crucial for advancing gene therapy for OTCD.
- The development of effective gene therapies could revolutionize the management of urea cycle disorders.
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