Gyngell, Douglas, Savulescu
There are rumours in the scientific community that the first studies involving the genetic modification of a human embryo are about to be published. If true this would be the first case of an experiment in which genes in germ cells (sperm and egg cells) have been intentionally modified. This has caused some concerns in the scientific community due to the fact that these modification are potentially heritable. A commentary in Nature, (written by four leading scientists and one philosopher) published an appeal that we “Don’t edit the human germ line”. Science meanwhile published a commentary which outlines “A prudent path forward for genomic engineering and germline gene modification”. The fact that two of the world’s most prestigious journals are publishing commentaries on human genetic modification shows just how powerful gene editing techniques have become. The rapid speed with which these technologies have developed has taken the scientific community, and everyone else, by surprise. Just three years after the DNA cutting nuclease Cas-9 was first used to modify DNA, scientists have been able to make heritable modifications to yeast, plants, mice, rats, pigs and even primates. It has been claimed that experiments conducted in China, currently under review, have used these same technologies to modify the DNA of human embryos. Continue reading
On Tuesday the 10th of March, Shaun Nichols delivered the 2015 Wellcome & Loebel Lecture in Neuroethics. You can listen to the lecture here.
Nichols presented a range of intriguing empirical data on how our view of the self affects our attitudes. The common view about the self is that it is something that persists through our lives. The self is an essential part of us that remains the same from childhood to adulthood. However some views in philosophy and religion see the self as something much less permanent. Continue reading
The Treasurer of Australia, the Hon Joe Hockey MP, recently received widespread attention with the statement:
It’s kind of remarkable that somewhere in the world today, it’s highly probable that a child has been born who will live to be 150.
Hockey made the claim while discussing some of the problems Australia faces as a result of an ageing population. While his statement was ridiculed by cartoonists and political rivals, he received support from some in the medical community. The Dean of Medicine at the University of New South Wales, Peter Smith, described Mr Hockey’s claim as a “reasonable assumption”. Professor Smith noted that life expectancy for Australians has been climbing dramatically over the past 100 years. A boy born between 2010 and 2012 can expect to live to 80 years and a girl can expect to live to 84 years. This is up from 55 and 59 years respectively in 1910.
However the fact that, on average, people have been living longer and longer does not support the claim that there is someone living today who will reach 150. Continue reading
A case currently before the UK Court of Appeal could have far-reaching implications for mothers who drink during pregnancy. Lawyers for a seven-year-old child with foetal alcohol syndrome caused by her mother’s heavy drinking, argue she should receive compensation from the government-funded Criminal Injuries Compensation Authority as she has been the victim of a crime. Continue reading
Reproductive technologies such as in-vitro fertilization (IVF) and preimplantation genetic diagnosis (PGD) mean it is currently possible for parents to create a range of embryos and make decisions about which to implant on the basis of their genetic makeup. One interesting possibility is that we will soon be able to use such technologies to influence the intelligence of our future children. It is known that intelligence has at least a moderately important genetic component. Identical twins are significantly more similar in intelligence than dizygotic twins, who are in turn significantly more similar than adopted siblings raised together. In fact, a range of studies indicate that the heritability of intelligence is approximately 0.7, which is only slightly lower than the heritability of height. This means that 70% of the variation we observe in intelligence is due to genetic factors. Once we can identify the genes which explain this variation it will be relatively simple to test embryos for them, meaning it will be technically possible for parents to select embryos on the basis of their likely intelligence.
However scientists are finding it surprisingly difficult to locate the specific genes which affect intelligence. Continue reading
In light of the fact that many readers will have an assortment of Christmas treats tempting them, I thought a post on impulse control would be timely.
In the now paradigmatic Stanford marshmallow experiment, children were given an option – one marshmallow which they could have immediately, or two marshmallows, provided they could wait 15 minutes. This option presents a problem of sorts. Is it better to have a small reward immediately, or a larger one after some delay? Common sense says that waiting is the better option. Doubling your reward whilst only paying a marginal cost of your time seems like the rational thing to do. Children who fail to wait are, therefore, seen as succumbing to temptation. A deficiency in self control leads them to make a poor decision. Continue reading
In the final Uehiro Seminar of 2012, Brian Earp provides an absorbing analysis of the science and ethics of anti-love biotechnology. You can listen to the seminar here.
While some personal distress as a result of love may be an important means of self-development, certain forms of love may be particularly perilous. Examples given by Earp include an older person’s sexual love for a child, incestuous love, and the love that prevents an abused spouse from leaving their partner. In these cases love can become like an ‘interpersonal heroin’ – an individual may recognise the harm their love is causing them, but be unable to stop feeling it. Continue reading
Earlier this year, scientists published a study that detailed the successful use of an artificial uterus to bring shark embryos to term. Once ‘birthed’ the shark pups showed no detrimental effects as a result of having gone through development in an artificial setting.
Research such as this ignites interest in the possibility of creating artificial wombs for the purpose of human reproduction. After all – artificial hearts, kidneys and lungs are all available and becoming increasingly sophisticated. It is surely only a matter of time before artificial wombs, capable of growing and developing a foetus outside the human body, are technologically feasible.
This raises the question of whether we should promote research aimed at shifting the location of foetal development to outside the human body. As a way of approaching some of the issues surrounding this prospect let’s consider a hypothetical scenario. Continue reading