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Reproductive Technologies

Cross-Post: The Moral Status of Human-Monkey Chimeras

Written by Julian Savulescu and Julian Koplin 

This article was first published on Pursuit. Read the original article.

The 1968 classic Planet of the Apes tells the story of the Earth after a nuclear war destroys human civilisation. When three astronauts return to our planet after a long space voyage, they discover that humans have lost the power of verbal communication and live much like apes currently do.

Meanwhile, non-human primates have evolved speech and other human-like abilities, and are now running the earth with little regard for human life.

The astronaut George Taylor, played by Charlton Heston, is rendered temporarily mute when he is shot in the throat and captured. In one scene he is brought before the Apes, as he appears more intelligent than other humans.

He regains the power of speech, and his first words are: “Take your stinking paws off me, you damned dirty ape.”

Planet of the Apes may be fiction, but this month the world’s first human-monkey lifeforms were created by Juan Carlos Belmonte at the Salk Institute for Biological Studies in the US, using private funding. Professor Belmonte and his group injected stem cells from the skin of a human foetus into a monkey embryo.

This part-human lifeform is called a chimera.

If implanted into a monkey uterus, the chimera could theoretically develop into a live-born animal that has cells from both a monkey and a human.

While it has been possible to make chimeras for more than 20 years using a different technique that involves fusing the embryos of two animals together, this technique has not been used in humans. It has been used to create novel animals like the geep – a fusion of a sheep and goat embryo.

Professor Belmonte used a different technique– called “blastocyst complementation” – which is more refined. It enables greater control over the number of human cells in the chimera.

But why is this research being done?

Read More »Cross-Post: The Moral Status of Human-Monkey Chimeras

Press Statement: He Jiankui

The response  to reckless human experimentation has to go way beyond Dr He’s dismissal. This is not merely a failure of compliance, Dr He failed to grasp the ethical principles and concepts he was vigorously espousing.  There will undoubtedly be more guidelines and laws on gene editing but we also need basic education of the… Read More »Press Statement: He Jiankui

A third MRT-baby is on its way

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Written by César Palacios-González

It has been recently reported (link in Spanish) that a 32 year old Greek woman is 27 weeks pregnant with a child who was conceived after a mitochondrial replacement technique (MRT) – in this case Maternal Spindle Transfer (MST). If true this is really big news in terms of reproductive medicine and biotechnology, we are still waiting for data to be published. If successful, this would be just the third birth following a reproductive technique that mixes the DNA of three people (you will probably remember the big media buzz a couple of years ago about ‘three parent babies’). This newest feat was achieved by a group of Spanish and Greek scientists; the clinical trial was carried out in Greece due to the fact that in Spain MRTs are not on the list of authorised reproductive techniques.

Before discussing what I consider to be the main ethical issue with this case, let us talk a bit about mitochondria and MRTs. Every human egg contains thousands upon thousands of mitochondrion. These tiny organelles have the really important task of producing the energy (in the form of ATP) that first the egg, then the developing embryo, and finally the human adult need to adequately function. It is thus not strange that when mitochondria do not work as they should the human body ‘malfunctions’. And it is also not strange that mitochondrial dysfunction more significantly affects the organs that require the most energy, for example the brain and the muscles.

To understand, broadly, what can go wrong with mitochondria, we need to bear in mind two of their characteristics: a) that they have their own DNA, and b) that they are mostly solely maternally transmitted. Regarding the former, inside every nucleated human cell there is nuclear DNA (nDNA) and there is mitochondrial DNA (mtDNA).

 

Read More »A third MRT-baby is on its way

Should Gene Editing Be Compulsory?

Written by Julian Savulescu

Hypothetical Case 1: Enzyme Replacement Therapy for Gaucher’s Disease

Consider a hypothetical version of a real life disease, Gaucher’s Disease. Gaucher’s disease is an inherited disorder caused by a genetic mutation. The mutation means an enzyme–  glucocerebrosidase — is not produced. A a result, glucerebrosides (fats) build up, damaging cells. This can cause bone fractures, liver enlargement, and bleeding but most importantly, brain damage. Once this has occurred it is irreversible.

Enzyme Replacement Therapy (ERT) is now available and for the purposes of this hypothetical case, the treatment offered, if given from the moment of birth, will prevent all damage (in real life current enzyme replacement treatments do prevent most symptoms, but do not affect nervous system involvement).

In our hypothetical case, a child is born to parents known to carry the mutation for Gaucher’s Disease, and prenatal testing has already confirmed that the baby is affected. ERT must be started at birth in order to prevent brain and other damage. However, the parents are Christian Scientists and refuse medical treatment. They believe prayer can cure their child’s condition.

Doctors are concerned the missing enzyme needs to be replaced before the child’s brain is damaged. They take the case to court where judges agree that therapy is in the child’s best interests.

Read More »Should Gene Editing Be Compulsory?

Why It’s Important to Test Drugs on Pregnant Women

By Mackenzie Graham

Crosspost from The Conversation. Click here to read the full article.

The development of accessible treatment options for pregnant women is a significant public health issue. Yet, very few medications are approved for use during pregnancy. Most drug labels have little data to inform prescribing decisions. This means that most medicines taken during pregnancy are used without data to guide safe and effective dosing.

The United States Food and Drug Administration recently published draft ethical guidelines for how and when to include pregnant women in drug development clinical trials. These guidelines call for “the judicious inclusion of pregnant women in clinical trials and careful attention to potential foetal risk”. The guidelines also distinguish between risks that are related to the research and those that are not, and the appropriate level of risk to which a foetus might be exposed.Read More »Why It’s Important to Test Drugs on Pregnant Women

Video Series: John Harris Defends Gene-Editing in Human Embryos

Novel gene editing technologies, such as CRISPR/Cas9, allow scientists to make very precise changes in the genome of human embryos. This could prevent serious genetic diseases in future children. But the use of gene editing in human embryos also raises questions: Is it safe? Should prospective parents be free to choose the genetic characteristics of… Read More »Video Series: John Harris Defends Gene-Editing in Human Embryos

Womb Transplants and Child-Centred Surrogacy

 

Julian Savulescu

Womb transplants are again in the news as Richard Paulson, president of the American Society for Reproductive Medicine (ASRM), said there was no reason to believe that the treatment could not work for transgender women at recent conference in Texas.

The ethical issues of performing a womb transplant for a transgender women are substantially the same as the issues facing ciswomen.

The most important ethical consideration in the UK for a womb transplant is distributive justice. Limited health care resources should not be used for womb transplants because there are more cost effective methods of assisted reproduction available. However if an individual wishes to use their own funds for such a procedure, they should be made aware of the risks (which are very significant), and the alternatives, such as surrogacy.

The best interests of the future child is another critical consideration. The moral status of the fetus is a topic of much debate. However, even if we consider abortion to be acceptable, and deny that the fetus has a moral status that accords it its own interests, in cases where the mother plans to carry the pregnancy to term, the fetus represents the future child who does of course have interests (albeit that they are to be weighed against the mother’s own interests, and that the mother is responsible for making decisions on their behalf).

Read More »Womb Transplants and Child-Centred Surrogacy

Good Enough Lives – Procreative Satisficence

By Dominic Wilkinson @Neonatalethics

 

Should parents undertake prenatal testing? Is there a moral reason to prevent disability in your future child through embryo selection?

In a special Moral Philosophy Seminar yesterday evening, Professor Tom Shakespeare, from the University of East Anglia, gave a nuanced and multi-faceted argument against the arguments advanced by Julian Savulescu and Jeff McMahan in favour of embryo selection. In particular he attacked Julian’s Principle of Procreative Beneficence (PB)

Procreative Beneficence (shortened version): when considering different possible children, based on relevant available information, couples should select the child who is expected to have the best life*

Read More »Good Enough Lives – Procreative Satisficence

Four myths about IVF in older women

Dominic Wilkinson, @Neonatalethics

Reports that a 62-year-old Spanish woman has given birth after IVF treatment have led many to question whether there should be age limits with such treatment. Lina Alvarez, a doctor in north-west Spain, isn’t the oldest person to have had success with IVF. Earlier this year, in India, Daljinder Kaur is said to have given birth at the age of 72, prompting calls from the Indian Medical Council for a ban on fertility treatment in women over the age of 50.

In many countries where there is funding assistance for IVF there is a limit to obtaining treatment over a certain age. In Britain, for example, the bar is set at age 42. But Alvarez received private treatment. So why care about her age? And what business is it of the rest of us whether she has access to IVF?

There are several arguments that typically surface in debates about age and fertility treatment – and they are all deeply flawed.Read More »Four myths about IVF in older women

Should we prevent Zika microcephaly using birth control?

Dominic Wilkinson, University of Oxford, @Neonatalethics

The World Health Organisation is to hold an emergency meeting after considerable concern about the zika virus in South America. The epidemic has been of considerable concern particularly because it has been linked to microcephaly (unusually small heads) in newborn babies that can lead to potentially devastating brain problems.

There is fear that this virus (if it is the cause) could spread throughout the Americas, including North America. There is no vaccine or treatment for the virus, and no known treatment for children who suffer brain damage in the womb. Officials in Columbia, Ecuador, El Salavador and Jamaica have recommended that women avoid or defer becoming pregnant to prevent their babies being affected. But is it ethical to use birth control to control Zika microcephaly?Read More »Should we prevent Zika microcephaly using birth control?