Animal Experimentation

Debate between David Amess and Margot James

Wednesday 7th December 2011 Commons Chamber

[Mr Amess]

I welcome the support of the hon. Gentleman, whose maiden speech I was privileged to follow. I am going to mention two or three cases that enforce what he says.

There is ample evidence to support the fact that animal models do not function in their role. That is a very important matter for the Home Office to consider. In my time here many Ministers have held the relevant responsibility, and of course those advising Ministers are also very important. I do not expect the Minister to give me a firm yea or nay during the debate, but I hope she will write to me about the points that I make.

Experiments on animals cannot predict the mechanisms of the disease in question, risk factors or potential adverse reactions. According to the US Food and Drug Administration, the world’s largest drug regulator—I hate to keep using America as the example, but it seems to have the latest data—92% of potential new drugs fail in human trials. We cannot just dismiss that, because it is huge number, but no publicity is given to it. The drugs fail either because they do not work on, or are not safe for, humans. I will come later to one famous and disastrous incident. After appearing safe and effective in animal tests, those drugs fail completely.

Communities of senior scientists are very much aware of the dangers of using animals as human indicators. The Safer Medicines Trust, the patient safety charity of senior scientists, including Sir Ian Wilmut, the renowned “father” of Dolly the sheep, has expressed its concern. It is clearly not opposed to animal experimentation per se, but it is concerned for patients and for science in general. Indeed, it has sent open letters to the Prime Minister and the Secretary of State for Health stating that the current system for ensuring the safety of medicines before clinical trials is inadequate and results in harm to volunteers and patients.

These are difficult times, and I know that people are paid to volunteer for trials, but there have been a number of well-documented disastrous consequences. The danger to human beings from the use of animal testing is clear. Even in pre-clinical stages, lives have been lost because the results have misled scientists.

I wonder how many people realise that penicillin stayed on the shelf for more than a decade because the results in the rabbits on which Fleming tested it led him to believe that it would be ineffective in humans. That was quite the wrong outcome—and we can think of the number of lives that could have been saved all those years ago.

Lives are threatened in the human clinical stages of trials. In March 2006 six young men took part in a clinical trial at Northwick Park hospital and were nearly killed by a drug that had been tested on monkeys and shown to be safe, even at 500 times the dose that the men were given. That is not a trivial matter, and I can remember clearly when it happened. Again, I do not expect the Minister to respond now, but I hope that after she has taken advice she will be able to discuss what happened in that trial.

Clearly, the results from the monkeys created a false sense of security, yet the risk carries over even when drugs pass to market. Any number of hon. Members will have had constituents lobby them on the painkiller Vioxx, which was eventually withdrawn in 2004 after the biggest drug disaster in history—it killed more than 100,000 people worldwide in its five years on the market. Clinical trials of Vioxx revealed up to a fivefold increase in the risk of a serious reaction such as heart attack, heart failure or stroke, but tests on animals indicated that it was safe, and in some instances that it was protective to the heart, which supported the manufacturer’s decision to market the drug. I am currently dealing with two or three constituents whose loved ones were affected by the drug, and who are trying to get compensation, which, as hon. Members know, is quite a tough battle. One hundred thousand people were affected worldwide.

Why should animals be indicators of human response? Animals and humans are evolved complex systems and as such should be expected to demonstrate different responses to drugs and disease.

[Margot James (Stourbridge) (Con)]

A number of drugs registered for humans are effective in animals. Dogs in older age respond very well to Prozac if they are a bit down, and a hypertension drug for humans has proved effective in restoring the vitality of apes in zoos in Britain.

[Mr Amess]

I apologise to my hon. Friend in case I was going too far on one side; my argument needs to be balanced.

Mutations that cause genetic disease in humans are the norm in some animals. Johnson et al found in 2001 that out of 39 anti-cancer drugs tested on xenograft mice, only one mimicked the response in humans. I say to the hon. Member for Strangford (Jim Shannon) that that cannot be much to rely on.