Gene chips advance medical research

• Article
• Comments ()
• Click-2-Listen
• Videos

By

Gene chips, DNA scanning devices that can sort millions of fragments of genetic information, are a major advance in personalizing disease diagnoses and medical treatments, based on differences in each patient's genes.

The thin glass chips, widely used in research laboratories for the past five years, may be commonplace in clinical practice in the not-too-distant future. They allow scientists to analyze thousands of human genes or gene fragments at once, rather than individually, so disease causes can be identified and therapies quickly applied.

Now some American scientists who have been on the cutting edge of this technology say it's time to develop international standards for the use of the tools, also known as DNA microarrays.

Last month, more than 40 scientists, including some from the U.S. Department of Health and Human Services and several from Europe and Asia, met in Paris to brainstorm this issue.

"International standardization has to happen. If not, it will hold back modern medicine, because all medical research is focused on using genomic tools for early diagnosis and treatment," said Dietrich Stephan, director of the neurogenomics division at the nonprofit Translational Genomics Research Institute, or TGen, in Phoenix.

Mr. Stephan said he is taking that position, even though the "vast majority of gene-chip use [to date] has been as a research tool," rather than in clinical practice.

He predicts global standards for assessing the technical performance of these chips will be in place in a year or two.

Janet Warrington, vice president of emerging markets and molecular diagnoses at Affymetrix, Inc., a Santa Clara, Calif.-based firm that has been a leader in gene-chip research, believes that prediction is entirely possible.

Reasons for optimism

"This is a force that's happening now. There are standard controls in development now, and it's an international effort," said Ms. Warrington, who organized and chaired the meeting in Paris.