Animals and Medical Science: A Vision of a New Era

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Animals and Medical Science: A Vision of a New Era

Magazine article

By: David O. Wiebers

Date: 1994

Source: David O. Wiebers. "Animals and Medical Science: Vision of a New Era." Sunrise Magazine. February/March (1994).

About the Author: David O. Wiebers is the Director of Neurology and a Professor of Neurology at the Mayo Clinic College of Medicine. He is also a Consultant in Neurology and Clinical Epidemiology at the Mayo Clinic in Rochester, Minnesota. His particular areas of interest are stroke prevention and epidemiology, intracranial aneurysms, diagnosis and treatment of stroke and related disorders, natural history and management of carotid occlusive disease, and the treatment of intracranial vascular malformations. He has been credited with nearly 150 scholarly publications.


There has always been considerable controversy around the use of animals in research laboratories. The degree of disagreement between those in favor and those opposed varies with the subject area: there is slightly less discord in the medical research realm than there is in the cosmetic and other consumer product testing arenas. As a rule, it is the research protocols that involve causing pain and suffering to animals that are the most contentious. When the outcome of the study will be of significant and measurable benefit to humankind and there will be minimal and promptly addressed pain or suffering caused to the experimental animals, research shows moderate public support of the process. Many research scientists whose opinions are published in the animal research literature state that they would prefer it if their work could be done without the use of experimental animals, they purport to use the smallest possible number of laboratory animals, and to use the most humane methods possible, within the confines of study requirements. Legislation and public policy dictate guidelines for the use and treatment of animals in the laboratory setting, and the United States Department of Agriculture conducts oversight of research facilities using animal subjects in order to ascertain that the requirements of the Animal Welfare Act are followed.

Animals are used in medical research for a variety of reasons: many disease processes can best (or only) be studied in living organisms; it is universally considered impractical and unethical to expose healthy humans to disease protocols or to unproven techniques and interventions in order to study a disease process or to develop effective medical or surgical interventions; many types of animals are sufficiently biologically similar to humans in their disease susceptibility to be used for study of processes in humans; and animals have shorter lives, so intervention outcomes can be studied over the course of a lifespan. In carrying out research projects, scientists often seek to control as many environmental and physiological variables as possible, in order to be certain that any changes they see in the organism are due to their intervention and not to some environmental or extraneous influences. With animals, it is more possible to control temperature, food and fluid intake, lighting, and other aspects of their environment during research studies.

When scientists develop potentially effective new pharmaceuticals, surgical techniques, or other medically related techniques or interventions, they must first be tested for efficacy and safety in animals. When the animal testing results can be demonstrated to be unequivocally positive, they may then be piloted in human volunteers who could derive substantial potential benefit from the interventions. Those human studies are called clinical trials.

Some examples of research involving animals that have had very beneficial outcomes for humans have occurred in studies of heart disease, cancer therapies, and treatments for bacterial infections. Among the techniques that have been developed as a result of laboratory animal research are: electrocardiography, cardiac catheterization, angiograms, techniques for measurement of cardiac blood flow, angioplasty, cardiac bypass surgery, and heart transplant techniques and technologies.

Many different types of animals have been used to study the ways in which viruses can cause tumors, and the ways in which tumors and various forms of cancer grow and spread. Chemotherapy protocols, radiation therapies, and many types of surgical interventions were developed as a result of laboratory animal research.

Early studies of antibiotics, particularly the use and efficacy of penicillin, were carried out with the use of rodents. They are still used in order to determine the effectiveness of targeted antibiotics with specific bacterial organisms, as well as to study efficacy, toxicity, side effects, and potential dosing protocols for newly developed pharmaceuticals.


The use of animals in biomedical research is perhaps the most volatile and controversial of all the issues facing the animal protection and medical communities.

As a physician, I have a great interest in the advancement of medical science to improve the health of humans and other living beings, but I also have a great interest in the protection of animals, and I can tell you that it has not always been easy or pleasant to reconcile the priorities of these two communities when it comes to this issue.

A number of animal-research advocates have called upon physicians everywhere to "defend medical science" and have been highly critical of physicians who seriously question practices within the field of medicine in regard to animal research, testing, and education. In the course of discussing so-called "extremists" and "radicals" in the animal movement, many animal-research advocates have begun to apply these terms not only to the few individuals engaged in violent, unlawful tactics but also to anyone who would advocate any change from the status quo, no matter how small.

With many of the voices currently emanating from the medical community so adamantly opposed to animal protectionists, and with the public and lawmakers historically having looked to the medical community as the primary source for defining public policy in this area, all of us who are seeking any type of change may feel a bit overwhelmed at times. Indeed, although it is very encouraging to see immense progress in many areas of animal protection over the past decade or two, in the area of biomedical research and testing, relatively little progress has occurred over the past century. All of this may logically lead you to ask: in the face of such overwhelming opposition to change, is it really possible to accomplish anything substantive in this area?

My answer to this is a resounding "yes." I am convinced that substantive progress can and will occur in this and many other areas because of the power in the underlying motivation of those involved in animal protection. The power of love and compassion for all life, combined with the ability to recognize the deeper identity of other sentient beings, instills within the human spirit an enduring and unfailing energy to protect and care for nonhuman as well as human life. Simple as this may seem, none of us should underestimate the power of this motivation.

There are other reasons for optimism on a more tangible level, not the least of which is that there are a growing number of physicians and scientists, including individuals at academic institutions, who simply do not buy the status quo in this area.

In addition, I would contend that physicians and scientists, including those presently opposed to animal protectionists, are for the most part otherwise caring, loving individuals and that this characteristic provides them with a strong potential to awaken to the importance of recognizing a higher priority for animals, given the proper circumstances.

In the meantime, however, the situation has become so sufficiently charged that many animal research advocates are resorting to rather extreme statements in order to sway opinions within the medical community and general public.

There are a number of fallacies being perpetuated that need to be challenged by those who truly give a high priority to the well-being of animals and want to see some kind of balance in the presentation of this information.

The first of these is that human health and animal welfare are incompatible. A number of organizations and individuals within the medical community have been telling the public and their legislators that any modifications in the current animal research and testing process would be too threatening to human health to justify the risk. This simply is not the case. There are substantial opportunities to incorporate the mainstays of HSUS policy in biomedical research, testing, and education, including the three Rs of refinement of techniques, reduction of the numbers of animals used, and replacement of animal methods with other techniques. Indeed, I would submit that the current volume of animal use in biomedical research, testing, and education could be substantially reduced without any ill effect on human health whatsoever.

A second fallacy is that animal protection groups threaten the future of medical science. Challenging the status quo is seldom easy. Usually those who profit from or strongly identify with a given institution will react defensively and with incredulity when someone questions the established order. This has led to a perceived dichotomy and adversarial relationship between the scientific and animal protection communities. Yet, I would contend that animal protection organizations can and should have a positive impact upon the scientific community (and upon society) by serving as a stimulus for changes that would otherwise be unlikely to occur.

Among these are advances in legislation such as the Animal Welfare Act, which, despite its many shortcomings, represented a step in the right direction, as is now acknowledged by both the animal protection and medical communities. Prior to the original act and its subsequent revisions passing into law, most organizations and individuals in the medical community advocating animal research were strongly opposed to these changes; now many of these same scientists and organizations cite the legislation as beneficial but oppose any further changes. Yet, 75 to 90 percent of the animals used for research in this country are not even covered by the Animal Welfare Act, and provisions applicable to performing the research procedures themselves are minimal.

The animal protection community can and should also serve as a positive stimulus for the development of alternatives to the use of animals in research and testing, and I think the Russell and Burch Award is a good example of this. (Annual award bestowed by HSUS on a member of the scientific community who has made a significant contribution towards the study of research methods not requiring animal testing.)

In challenging the status quo, I would challenge my colleagues in the medical community—if we have a genuine priority for the well-being of animals, the medical community should be embracing the animal protectionists' concerns rather than rebuffing them. We should delight in finding and implementing solutions which accommodate these concerns and welcome the opportunity to do so.

A third fallacy involves the recurring theme put forth by animal research advocates that all—or virtually all—major medical advances have relied upon and occurred because of animal experimentation. This is an important consideration because, if one accepts the premise, one is led to the conclusion that animal research may be the only means at our disposal to advance medical science. It is understandable that animal researchers and academic scientists would tend to value the significance of animal research, and there is certainly substantial basis in fact for recognizing the contributions of scientists and science based upon the use of animals in research. However, to generalize from the facts and claim that all or even most biomedical knowledge of significance is derived from research using animals is a sizable distortion of the truth and reflects poorly upon those propagating it. It also sells short the myriad of clinicians and clinical researchers who, over the years, have made incredible contributions to medical knowledge without the use of animals.

Let me make a few comments about alternatives to animal research. Most physicians and scientists would agree that the development of alternatives to using live animals in research is desirable. Indeed, some encouraging progress is being made in this area with regard to the use of tissue cultures and other in vitro testing, as well as mathematical and computer models. However, we should not be under any false illusions that all of the findings of animal research can be reproduced in a computer model or tissue culture given our current level of technology and understanding. It is disappointing that a number of animal research advocates have taken this a step further and all but dismissed alternatives as severely limited while criticizing animal protectionists for exaggerating their potential. Some have expressed alarm at the idea that animal protection groups would hope for the day when the use of animals in research could be completely abolished, stating that this reveals the underlying "radical" nature of these groups.

Yet it is many of these same scientists who, despite their scientific knowledge, fail to think more broadly about the concept of alternatives.

Even though there are many instances where we cannot produce a specific piece of information without using live animals, we need to be open to the possibility that that piece of information may not be needed to solve the clinical problem we are addressing. In this circumstance, the "alternatives" concept becomes somewhat broader and focuses upon the end result rather than specific types of information.

Seeing this issue through the eyes of both a medical researcher and animal protectionist has taught me that the priority and motivation for finding alternatives to the use of animals differ considerably among individuals involved in these disciplines, and this undoubtedly accounts for at least some of the lack of progress in developing alternative methods. In addition, there has been very little incentive to physicians and researchers to develop these methods from the standpoints of available funding and academic career development. One of the things that we who are involved in animal protection need to do more of is to think of ways to motivate and inspire physicians and animal researchers to utilize their scientific knowledge and innovativeness to develop other means to address health problems.

Perhaps the time has come for all of us to recognize that humankind's greatest goal, which outweighs lengthening life through medical advancements, is to evolve spiritually and that in order to do this there is a need for us as a species to learn to think of other beings as ends rather than means. I would hate to think that being a physician or scientist meant that one could not care deeply about the well-being of sentient beings other than human beings. For those involved in animal protection, a deep caring implies more than lip service. It implies placing a high priority on securing humane conditions for animals as well as humans, even in the face of incurring substantial extra cost. It involves a careful and critical look at projects and areas in which animal research is highly unlikely to benefit human or animal health, and/or is grossly inhumane, and a cessation of those projects. It implies a high priority for the development of alternatives to the use of animals in research testing, and education. We should be devoting considerably more time and resources to the development of such alternatives. The main reasons we are not doing so involve convenience, extra cost, the ease of using previously learned methods as opposed to developing new ones, and the lack of enough true concern about other sentient beings besides human beings.

The title of this talk included the phrase, "vision of a new era." I have already indicated to you today that I am convinced that we are on the verge of an era where things will change more substantively in this area. This will come about either with cooperation between the medical and animal protection communities or without such cooperation, through increasing pressure from public and governmental sources. The latter circumstance would take longer, and the ultimate result would be far less congenial to the medical profession. Fortunately, I think there are enough intelligent and compassionate members of both the animal protection and medical communities to warrant optimism that a cooperative effort will constitute the road we travel.

The primary mission of the medical profession is to alleviate human suffering, the achievement of which is often enhanced by various advancements in medical knowledge including the development of new technologies and treatments. The animal protection community simply wishes to extend this alleviation of suffering to other beings besides human beings.

I am convinced we can have both.

I am convinced we must have both in order for us to evolve as a species.

This then constitutes the beginning of a new era when both the animal protection and scientific communities realize that many of their goals are the same and that society and medical science can work toward improving human health while also working to eliminate the need for the use of animals in biomedical research, testing, and education.

In the image of this era, I see a day where the initiatives of the animal-protection community are welcomed by the scientific community and where all of us begin to come to the conscious realization that it is compassion for all life rather than scientific achievement that represents the pinnacle of human existence.

I see a day when all medical schools and veterinary schools require ethics courses with substantive discussions about animals, not merely as objects for humans to utilize in any way that may presumably benefit our species, but rather as independent sentient beings.

I see a day when medical schools and research facilities clearly recognize that it is their obligation to humanity as well as animals to develop nonanimal research methods to advance human health and that, yes, it can be done because they have the will and the desire to do it.

I see a day when human vanity and convenience are no longer sufficient to justify the suffering and killing of other species and the use of animal testing for the cosmetics and household-products industries can be eliminated.

I see a day when scientific investigators are so moved by compassion that their brilliance and ingenuity are directed toward thinking about and developing innovative alternatives to animal research and testing rather than innovative ways to avoid changing the status quo.

Some may call all of this wishful thinking—and certainly I don't claim to have a crystal ball or to be able to put some precise time frame on any of this. However, there are a number of factors which make the coming of this era inevitable.

I have already alluded to the power of the underlying motivation of "compassion for all life" which drives the animal-protection movement. It is also important to recognize that all humans have within them the potential to awaken to this motivation and that we as a species have an underlying need to do so in order to evolve spiritually.

Thirdly, and perhaps most revealing, is the observation that this is indeed a one-way street. For those individuals who have awakened to the virtue and necessity of a "compassion for all life" ethic, there is no turning back. Rather, these individuals continue to evolve toward perfecting this ethic in their own lives and in the world around them. The evolution of our species will mirror that of its individual members. As with other significant changes in social attitudes throughout history, the opposition will be formidable; the process will be cumbersome, costly, and frustrating; the means to achieving change will be varied; and the road will be trying and sometimes discouraging. But, the result will be glorious—think about it: a world that will foster not only harmony between humans and other animals, but also between humans and other humans.


Research involving animals is likely to continue as long as there is no acceptable or reliable alternative. That being the case, there is a movement toward ensuring that laboratory research animals suffer as little as possible in the process, through the use of the three R's: Reduction, Refinement, and Replacement. Reduction involves using as few animals as necessary for a particular research purpose. Rather than replicating the same result numerous times, a scientist advocating reduction might determine that a much smaller number of replications of a particular result would allow for confidence in a particular scientific conclusion.

Refinement has to do with finding the least painful and stressful means of carrying out a particular research protocol. For example, the technique of capture and restraint is felt to be stressful and frightening for animals, and is often followed by painful injections or blood draws, adding pain and injury to stress and trauma. A tether and jacket system, in which a catheter and rubber tube are inserted into the vein of an anesthetized laboratory animal and then fastened into place, so the animal has some freedom of movement, and does not have to be caught or restrained in order for the substance to be injected or blood to be drawn, is considered a significant refinement. By using refinements, scientists are able to cause the animals less pain, trauma, and stress.

Replacement is when research that had historically used animals is carried out by other, alternative, means. For instance, cell cultures or computer simulations and modeling are now used in place of live animals for certain types of research.

The United States Department of Agriculture creates regulations, and the National Institutes of Health sets guidelines for the uses of animals in laboratory and medical research. Research institutions, whether they are academic or commercial, are required to have Institutional Animal Care and Use Committees (IACUCs), whose function it is to interpret, carry out, and enforce humane policies for laboratory animal treatment based on the regulations and guidelines set for them by the UDSA and the NIH, as well as their own state, local, and institutional policies and procedures.

Utilizing the three R's in animal research should advance the goals of science while increasing efficiency and cost-effectiveness, minimizing pain, suffering, and trauma, using the fewest possible animals, and employing the most humane possible treatment. There is general consensus among research scientists that animal research must continue until scientifically appropriate alternatives are available, but that the least possible harm must be inflicted while so doing.



Carbone, Larry. What Animals Want: Expertise and Advocacy in Laboratory Animal Welfare Policy. Oxford: Oxford University Press, 2004.

Web sites

BBC News. "Head-to-Head: Animal Testing." 〈〉 (accessed December 9, 2005).

Coalition for Consumer Information on Cosmetics. "About Us: Who We Are and What We Do." 〈〉 (accessed December 9, 2005).

Humane Society of the United States. "Animal Testing." 〈〉 (accessed December 9, 2005).

Nuffield Council on Bioethics. "The Ethics of Research Involving Animals." 〈〉 (accessed December 9, 2005).

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Animals and Medical Science: A Vision of a New Era

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