TO THE HOUSE OF REPRESENTATIVES:

I am returning herewith without my approval H.R. 810, the "Stem Cell Research Enhancement Act of 2005."

Like all Americans, I believe our Nation must vigorously pursue the tremendous possibilities that science offers to cure disease and improve the lives of millions. Yet, as science brings us ever closer to unlocking the secrets of human biology, it also offers temptations to manipulate human life and violate human dignity. Our conscience and history as a Nation demand that we resist this temptation. With the right scientific techniques and the right policies, we can achieve scientific progress while living up to our ethical responsibilities.

In 2001, I set forth a new policy on stem cell research that struck a balance between the needs of science and the demands of conscience. When I took office, there was no Federal funding for human embryonic stem cell research. Under the policy I announced 5 years ago, my Administration became the first to make Federal funds available for this research, but only on embryonic stem cell lines derived from embryos that had already been destroyed. My Administration has made available more than $90 million for research of these lines. This policy has allowed important research to go forward and has allowed America to continue to lead the world in embryonic stem cell research without encouraging the further destruction of living human embryos.

H.R. 810 would overturn my Administration's balanced policy on embryonic stem cell research. If this bill were to become law, American taxpayers for the first time in our history would be compelled to fund the deliberate destruction of human embryos. Crossing this line would be a grave mistake and would needlessly encourage a conflict between science and ethics that can only do damage to both and harm our Nation as a whole.

Advances in research show that stem cell science can progress in an ethical way. Since I announced my policy in 2001, my Administration has expanded funding of research into stem cells that can be drawn from children, adults, and the blood in umbilical cords with no harm to the donor, and these stem cells are currently being used in medical treatments. Science also offers the hope that we may one day enjoy the potential benefits of embryonic stem cells without destroying human life. Researchers are investigating new techniques that might allow doctors and scientists to produce stem cells just as versatile as those derived from human embryos without harming life. We must continue to explore these hopeful alternatives, so we can advance the cause of scientific research while staying true to the ideals of a decent and humane society.

I hold to the principle that we can harness the promise of technology without becoming slaves to technology and ensure that science serves the cause of humanity. If we are to find the right ways to advance ethical medical research, we must also be willing when necessary to reject the wrong ways. For that reason, I must veto this bill.

GEORGE W. BUSH

THE WHITE HOUSE,

July 19, 2006.

Why do scientists want to use stem cell lines?
Once a stem cell line is established from a cell in the body, it is essentially immortal, no matter how it was derived. That is, the researcher using the line will not have to go through the rigorous procedure necessary to isolate stem cells again. Once established, a cell line can be grown in the laboratory indefinitely and cells may be frozen for storage or distribution to other researchers.

Stem cell lines grown in the lab provide scientists with the opportunity to "engineer" them for use in transplantation or treatment of diseases. For example, before scientists can use any type of tissue, organ, or cell for transplantation, they must overcome attempts by a patient's immune system to reject the transplant. In the future, scientists may be able to modify human stem cell lines in the laboratory by using gene therapy or other techniques to overcome this immune rejection. Scientists might also be able to replace damaged genes or add new genes to stem cells in order to give them characteristics that can ultimately treat diseases.