Research on human embryo: a European hope

Publié le 30 Apr, 2011

In an open letter published on 28th April 2011 in the magazine Nature, 13 European scientists working on human embryonic stem cells (CESh) have expressed their concern about a possible prohibition, at European level, of the patentability of innovations using CESh. On 10th March 2011, the Advocate General of the European Court of Justice Yves Bot indeed delivered a report concluding clearly that the patentability and the use for industrial or commercial purposes of the human embryo and CESh is “against ethics and public order“.  For the signatories of the appeal of Nature, such a prohibition would lead the pharmaceutical industry, deprived of intellectual property, to switch to other markets than the European market to develop techniques from CESh.

Signed among others by the French researcher Marc Peschanski, this letter has a particular resonance in France, on the eve of passing the bill of bioethics its second reading, whereas all people are waiting to know if the French National Assembly will confirm the authorisation of the research on the human embryo at the Senate.


Brüstle vs Greenpeace case


The opinion of the Advocate General was published within the framework of the case opposing the German researcher Oliver Brüstle, holder of a patent of a method for converting CESh into nerve cells, to Greenpeace. The latter had brought court action in Germany, estimating that this patent was in contradiction with the Directive 98/44 of the EU which foresees that the uses of human embryos for industrial and commercial purposes” are excluded from the patentability. Condemned, Mr. Brüstle had appealed the national court, which asked the European Court of Justice to define what it must be understood by “human embryos” and by “use of human embryos for industrial and commercial purposes.


Yves Blot’s conclusions


The answers proposed by Yves Bot are based on the principle according which the member states must respect the Directive 98/44 to the extent that the European Union is not only a market to regulate, but has also values to express“. This directive must be interpreted according to the following conclusions:

  • The notion of human embryo applies from the fertilization stage to all the totipotent embryonic cells, because the essential characteristics of these is to be able to develop in a complete human being;
  • An invention must be excluded from the patentability when the implementation of the technical process submitted to the patent uses embryonic stem cells whose sampling implies the destruction or even the alteration of the embryo, and “even if the description of this process does not contain any reference to the use of human embryos“. Indeed, to obtain embryonic stem cell lines, cells are sampled from “the human embryo at the blastocyst stage” which “necessarily involves the destruction of the human embryo. Giving an industrial application to an invention using embryonic stem cells would  lead to use human embryos as a trivial source material” ;
  • The exception to the prohibition of the patentability of using human embryos for industrial and commercial purposes concerns the sole inventions having a therapeutic or diagnosis purpose which apply to the embryo and are useful to it“;
  • Finally it defines “the use of embryo for industrial or commercial purposes” as involving a “large-scale production” or even the “culture of cells dedicated to pharmaceutical laboratories“. Using embryonic stem cells for modelling pathologies or screening molecules, uses for which the scientists claim the authorisation of the research on the embryo in France, thus would be prohibited.




The opinion of the prosecutor Yves Bot was submitted for approval to the thirteen judges of the European Court of Justice. They will make their decision in the coming weeks. If they were followed, the prosecutor’s conclusions could have a strong impact on the European practices on the research on the embryo.

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