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November 14, 2016

New non-invasive DNA-test for the unborn child

More and more non-invasive methods are coming, to diagnose. From blood- up until DNA-sampling. On this last field the VUmc from the Netherlands makes itself heard, by teaming up with the Wayne State university in Detroit. Together they’re developing a swab test to take DNA from an unborn child. The researchers hope to be able to show deviations to an unborn child much sooner in the future.

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Researcher Marie van Dijk from the VUmc: “This new method is in its research stage, but shows much promise. In the future we hope to be able to show deviations much sooner in the future. We can isolate and investigate DNA as early as in the fifth week. We have a long way to go before we can provide the test. But I’m convinced that we can perform these analysis within a few years based on a swab test from a pregnant woman.”  

Invasive chorionic villus sampling, amniocentesis

There are over 6.000 known illnesses caused by a deviation from a single gene, according to the VUmc. By taking foetal tissue with invasive chorionic villus sampling or amniocentesis birth defects with a genetic cause can already be diagnosed in the womb. Researchers from the VUmc now have isolated, together with their colleagues from Detroit, intact cells of the placenta with DNA from the unborn child in it. With a special swab test these cells can be obtained in the 5th until the 19th week of the pregnancy through the vagina and the cervix.

Proving genetic diseases

The foetal DNA can be used to indicate certain genetic diseases such as cystic fibrosis, Duchenne muscular dystrophy and haemophilia at the unborn child. The next step will be to compare these test results with the invasive chorionic villus samples and amniocentesis to establish whether this new method can in time replace the current invasive method.

The special swab test is now only performed for scientific reasons. VUmc only analyses the obtained cells, so it is not possible to undergo a treatment such as this in the academic hospital. The results of the research are published in Science Translational Medicine.

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