Grappling with moral arithmetic

Grappling with moral arithmetic

A juvenile Rhesus macaque • Photo by Charles J. Sharp (CC BY-SA 4.0)

Originally published 30 January 2001

An adorable 3‑month-old rhe­sus mon­key looks out at us from the pages of the jour­nal Sci­ence. His name is ANDi. He has, appar­ent­ly, not a care in the world; a healthy lit­tle scamp who is pre­sum­ably treat­ed affec­tion­ate­ly by his keepers.

ANDi (whose name in reverse stands for “insert­ed DNA”) is unique. He is the first trans­genic pri­mate. He car­ries a gene iso­lat­ed from a jel­ly­fish that codes for a pro­tein that caus­es the jel­ly­fish to glow green. ANDi does­n’t glow, but he might have. The gene trans­fer was a “suc­cess.”

To cre­ate ANDi, biol­o­gists at the Ore­gon Region­al Pri­mate Research Cen­ter first mod­i­fied a virus to con­tain the jel­ly­fish flu­o­res­cence gene, then insert­ed the virus into the unfer­til­ized eggs of rhe­sus mon­keys. A few hours lat­er, the eggs were inject­ed with sperm and implant­ed in females.

Three healthy mon­keys were born, but only one, ANDi, car­ries the flu­o­res­cence gene. A pair of mis­car­ried twins also car­ried the gene, and, unlike ANDi, their hair fol­li­cles and toe­nails glowed green under flu­o­res­cent light. It is not known if the insert­ed gene had any­thing to do with the miscarriages.

None of these tech­niques are new. In vit­ro fer­til­iza­tion has been used exten­sive­ly even for humans, and jel­ly­fish flu­o­res­cence genes have been insert­ed in plants, amphib­ians, and mice. But ANDi’s birth brings trans­genic exper­i­ments clos­er to our own species.

What are we to make of this exper­i­ment? I am no anti­vivi­sec­tion­ist. I approve of the use of ani­mals in med­ical research when there is no sat­is­fac­to­ry alter­na­tive, and most sci­en­tists, I sup­pose, feel much the same. We hold the ame­lio­ra­tion of human dis­ease of greater val­ue than the lives or genet­ic integri­ty of research animals.

At the same time, we have all grown more sen­si­tive than in the past to ani­mal rights, and to the unnec­es­sary or friv­o­lous use of exper­i­men­tal animals.

Indeed, most sci­en­tists who work with ani­mals seem far more con­cerned about ani­mal wel­fare than many non­sci­en­tists who would as soon whack a gar­den snake with a shov­el as swat a mos­qui­to, or blaze away at a white-tailed deer for sport.

But still, here is sweet lit­tle ANDi with his big baby-doll eyes, seem­ing­ly implor­ing love, and who can­not feel at least a twinge of guilt that his genes are not entire­ly his own? And what about those mis­car­ried twins with glow­ing toenails?

The stag­ger­ing pow­er of the gene manip­u­la­tors calls out for a vig­or­ous pub­lic debate on the ethics of trans­genic exper­i­ments. The debate rages in pub­lic forums and on the Inter­net, but we are a long way from reach­ing con­sen­sus as a society.

Where do we go for moral guid­ance? The received wis­dom of the world’s great reli­gions is silent about the specifics of trans­genic exper­i­ments. There was no 11th Com­mand­ment on Moses’ tablets that said, “Thou shalt not mess with a mon­key’s genes.”

So how about the Gold­en Rule, com­mon to many reli­gions: Do unto oth­ers as you would have them do unto you? But the Gold­en Rule implies the pos­si­bil­i­ty of reci­procity. How does it apply between species, when we are the only species with the pow­er to “do unto?”

If we sud­den­ly found our­selves on the Plan­et of the Apes, would we want the apes tin­ker­ing with our genes?

How do we do the moral arith­metic of ani­mal exper­i­men­ta­tion? How do we weigh the human chil­dren afflict­ed with AIDS, say, against the well-being of ani­mals used in AIDS research? How many genet­i­cal­ly mod­i­fied rhe­sus mon­keys equals the one future child with Down’s syn­drome or hemo­phil­ia who might be spared that fate by trans­genic pri­mate research?

Who has the wis­dom or the courage to make these determinations?

The Ore­gon researchers believe ANDi and his future trans­genic cousins will help us under­stand such things as aging, neu­rode­gen­er­a­tive dis­eases, immunol­o­gy, and behav­ior, pre­sum­ably lead­ing to health­i­er, hap­pi­er lives for all. And cer­tain­ly few of us want to go back to the days before mod­ern med­i­cine, which has depend­ed might­i­ly in its devel­op­ment upon ani­mal research.

On the oth­er hand, I have friends, wise and good, who would deliv­er a resound­ing “No” to all trans­genic research, as the tip of a wedge that will even­tu­al­ly open a moral chasm. They con­tend that the Ore­gon exper­i­ment does not have any imme­di­ate ther­a­peu­tic appli­ca­tion, and that dis­ease can be ame­lio­rat­ed with­out the use of trans­genic animals.

Mean­while, ANDi’s trust­ing eyes pose a ques­tion we dare not turn away from?

I don’t know the answer to the ques­tion. I wish I had the moral cer­ti­tude of those who can utter an unqual­i­fied “Yes” or “No,” but I do not. In the end, I trust the col­lec­tive moral good­ness of my species to make the right deci­sions — the dis­mal exam­ple of the Nazi sci­en­tists notwithstanding.

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