Human Clinical Trials Go Global
The clinical trial phase of the drug development process is labor intensive, costly and usually takes the largest amount of time to complete. In the past, most human clinical trials for new molecular entities discovered by American scientists were conducted in the US. However, growing healthcare costs and shortages of “treatment-naive” trial participants have forced drug makers to take the effort global. To that end, many companies now routinely conduct Phase I (safety) and Phase II (proof of principle) trials in Eastern Europe, Latin America and Asia. Moreover, a growing number of pharmaceutical companies are beginning to conduct pivotal Phase III trials in which a majority of participants come from outside of the US.
Last year, a report from the inspector general of the Department of Health and Human Services revealed that in 2008 a whopping 78 percent of all subjects participating in trials to support drug applications submitted to the US Food and Drug Administration were enrolled in foreign sites. Likewise, in Europe, approximately 61 percent of patients in human trials submitted to the European Medicines Agency (EMA) from 2005-2009 were from developing countries. Additionally, 11 percent of the participants were enrolled in studies conducted in Eastern Europe. Poland and Hungary appear to have benefited the most from this trend; the number of Poles involved in trials rose fivefold over the period while Hungary was up almost fourfold.
According to a recent article from Reuters, ClinicalTrials.gov—a public website managed by the National Institutes of Health that tracks current US clinical trials—lists roughly 106,000 human clinical trials that are underway around the world. Approximately 50 percent of these trials are being conducted in the US. Interestingly, at present, only 43 percent of all pivotal Phase III trials are being conducted in the US. Not surprisingly, China is the beneficiary of the trend and is experiencing exponential growth in the number of clinical trials conducted within its borders. To date, over 2,700 clinical trials have been performed in China and that number is likely to drastically increase over the next five years as Chinese medical and healthcare infrastructure continue to improve.
While outsourcing human clinical trials may be favorable to drug makers, the trend is beginning to anger many American physicians who previously benefited from managing US-based clinical trials. These physicians blame their misfortune on the life sciences industry’s endless pursuit to lower costs and the increasing regulatory bureaucracy and red tape surrounding clinical trial procedures in the US.
In addition to physician anger, outsourcing human clinical trials poses several other problems. First, there is a question of ethics. For example, is it right to test an expensive new drug in a country where locals may never be able to afford it if approved? And, are foreign patients always adequately informed or educated about the potential risks and side effects associated with experimental medicines? Second, can ethnic differences between patients contribute to differences in drug effectiveness and safety? In other words, will Caucasian patients respond to a new drug in the same ways as Asian patients? Finally, in the absence of rigorous regulatory inspections can Good Clinical Practices be routinely maintained across all global clinical trial sites? To that end, as pointed out in the Reuters article from 2005 to 2009 EMA inspectors only conducted 44 good clinical practice inspections (outside of the US and Europe) from a total of 44,034 clinical sites. Meanwhile, during the same period, the US FDA inspected only 0.7 percent of foreign clinical trial sites as compared with 1.9 percent of domestic sites.
Like it or not, outsourcing of human clinical trials in emerging markets is a trend that is likely here to stay. Hopefully, in the future, regulatory agencies will be able to better oversee foreign human clinical trials to insure that the drugs that they approve continue to be safe and efficacious.
Until next time...
Good Luck and Good Job Hunting!!!!!!!!!
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Optimer, a San-Diego, CA-based biopharmaceutical company, reported 