To date, over 1800 gene therapy clinical trials have been completed, are ongoing or have been approved worldwide. Our database brings together global information on gene therapy clinical trials from official agency sources, published literature, conference presentations and posters kindly provided to us by individual investigators or trial sponsors. This review presents our analysis of clinical trials that, to the best of our knowledge, have been or are being performed worldwide. As of our June 2012 update, we have entries on 1843 trials undertaken in 31 countries. We have analysed the geographical distribution of trials, the disease indications (or other reasons) for trials, the proportions to which different vector types are used, and which genes have been transferred. Details of the analyses presented, and our searchable database are available on The Journal of Gene Medicine Gene Therapy Clinical Trials Worldwide website at: http://www.wiley.co.uk/genmed/clinical. We also provide an overview of the progress being made in clinical trials of gene therapy approaches around the world and discuss the prospects for the future.

To date, over 1340 gene therapy clinical trials have been completed, are ongoing or have been approved worldwide. In 1997 we set up a database to bring together global information on gene therapy clinical trials as comprehensively as possible. The data are compiled and regularly updated from official agency sources, published literature, conference presentations and posters and from information kindly provided by investigators or trial sponsors themselves.This review updates our descriptive overview of the data in 2004 1, presenting our analysis of the clinical trials that, to the best of our knowledge, have been or are being performed worldwide. As of July 30 2007, we have stored entries on 1309 trials in 28 countries. We have analyzed the geographical distribution of trials, the disease indications (or other reasons) for trials, the proportions to which different vector types are used, and which genes have been transferred. Details of the analyses presented, and our interactive, searchable database can be found on The Journal of Gene Medicine Gene Therapy Clinical Trials Worldwide website at: http://www.wiley.co.uk/genmed/clinical. Copyright © 2007 John Wiley & Sons, Ltd.

In 1989, Rosenberg et al. performed the first human gene therapy trial when they used a retrovirus to introduce the gene coding for resistance to neomycin into human tumor-infiltrating lymphocytes before infusing them into five patients with advanced melanoma. This study demonstrated the feasibility of using retroviral gene transduction in humans and set the stage for further studies. Since then, over 900 clinical trials have been completed, are ongoing or have been approved worldwide. These trials have been designed to establish feasibility and safety, to demonstrate the reality of expression of therapeutic protein(s) in vivo by the genes transferred and, in some cases, to show therapeutic benefit. There is no single source of information that presents an overview of all the clinical trials undertaken worldwide. In 1997 we set up a database to bring all the information on clinical trials together as comprehensively and as globally as possible. The data were compiled and are regularly updated from official agency sources, the published literature, presentations at conferences and from information kindly provided by investigators or trial sponsors themselves. As of January 31, 2004, we have identified 918 trials in 24 countries. The USA accounts for two-thirds of these trials. Cancer is by far the most common disease indication, followed by inherited monogenic diseases, and cardiovascular diseases. Viral vectors have been the most frequently used vehicles for transferring genes into human cells, with retroviruses and adenoviruses representing the vast majority. Plasmid (naked) DNA and other non-viral vectors have been used in one-quarter of the trials. Over 100 distinct genes have been transferred. This article aims to provide a descriptive overview of the clinical trials that, to the best of our knowledge, have been or are being performed worldwide. Details of the data presented, including an interactive, searchable database that currently holds information on 918 trials, can be found on The Journal of Gene Medicine clinical trials website 1.

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