The University of Southampton

Born to save another, is that my only purpose: The Bioethics of Saviour Siblings

As a teenager, the movie “My Sister’s Keeper” initiated my interest in saviour siblings. It portrays a young girl who tries to gain medical emancipation from her parents when urged to donate a kidney to save her leukaemia-stricken sister. After further research, I discovered that the movie addresses the ethics of saviour siblings. Consequently, it prompted questions, like whether it is right to do whatever is necessary to save a child’s life at the expense of infringing upon the rights of another?; and ultimately, is creating a saviour sibling ethical in the first place?

For those unaware, a saviour sibling is a child conceived through IVF. An embryo undergoes pre-implantation genetic diagnosis such as HLA typing to create a genetically compatible individual who can provide stem cells, blood, or organs to a sibling requiring them to live. Although creating a saviour sibling appears to be a noble endeavour, when addressing the ethics; three arguments are considered.

1. Saviour siblings as commodities:

This perspective stems from the idea that saviour siblings are a continuous and potentially expendable resource, contradicting Immanuel Kant’s maxim, “Never simply use people as a means, but always at the same time as an end”, and subsequently opposes the view of ethics as “right”. However, some argue that Kant’s assertion, in this case, doesn’t distinguish between having a child as a saviour sibling and having a child for another objective, like completing a family or saving a marriage, as the child is still a tool for serving a purpose. Thus, from a Kantian perspective, what is wrong is to create saviour siblings for a specific reason and then just discard them afterwards.

2. Saviour Siblings could lead to designer babies.

No!! Designer babies are not Gucci babies! They refer to genetically engineering pre-implantation embryos to influence the traits children will have. The creation of saviour siblings could be seen as a step towards pre-determining a child’s purpose and characteristics, illustrating a desire for perfectionism in a child by a parent rather than wanting them for who they are, thereby limiting their development as individuals. Furthermore, like the genetically “perfect” society in the sci-fi movie Gattaca, this argument allowed me to consider the path to negative eugenics that creating saviour siblings could create, selecting favourable traits to the detriment of people who cannot compete, and with the development of gene-editing tools like CRISPR-Cas9, such societal perfection and extreme segregation could be a misguided future reality.

3. The welfare of the saviour sibling

This argument considers the physical and emotional well-being of the saviour sibling. Alnasir et al. 2020 argue that regarding saviour siblings, the principles of beneficence and nonmaleficence of medical ethics are violated; since their creation and donation process carries no medical benefits for them but does impose potential harm, as they risk not only a painful invasive transplantation procedure but also abandonment and long-term detriment to their self-worth; if their donation is unsuccessful since their identity and value originate from being a cure to their older sibling.

Final thoughts

The conception of saviour siblings is an ethically controversial practice to which there is no clear answer; fortunately, this delicate process is regulated by the Human Fertilisation and Embryology Authority, authorising the creation of saviour siblings as per approved set conditions. Overall, this topic expanded my learning and prompted the conclusion that though it appears impossible to grasp the full extent of saviour siblings, the answer is that there may be no good answer, but as humans and a society, we must make decisions and applicable regulations for a virtuous future for those born to save another.

Treating the Invisible Pain: Prosthetics and Phantom Limb Pain

I was initially intrigued by the concept of Phantom Limb Pain (PLP) because I was fascinated by how someone could experience pain in a body part they no longer possessed. The depiction of PLP in the sci-fi movies I watched when I was younger seemed to be a figment of the imagination; it appeared to be a mysterious occurrence, somewhat fantastical and an element of creative licence adding dramatic effect.

After further research, I discovered that this perplexing phenomenon is real, not make-believe! The basis of PLP although unclear, is suggested to be due to changes in an amputee’s brain organisation; more specifically, alterations in the somatosensory cortex responsible for processing sensory information such as sight and touch, thus affecting the perception of pain sensitivity.

For those who are unaware, PLP can occur within the first few days after amputation; and can persist without intervention. The symptoms vary from the perceived ability to voluntarily move the phantom limbs to intense pain and tingling sensations. PLP treatment is usually with pharmacotherapy, and prosthetic use is considered an adjuvant therapy.

So where do prosthetics come in?

A prosthesis is an artificial device that substitutes for part of the body that is absent due to amputation as a result of a disease or traumatic injury.

Weiss et al. (1999) investigated how increased use of the residual limb by a prosthetic could alleviate PLP by comparing the amount of PLP experienced by upper extremity amputees who wore either the Sauerbruch prosthesis or a cosmetic prosthesis. The Sauerbruch prosthesis allows for the performance of several activities by being connected to one of the muscles of the arm through a surgically created tunnel with cables that operate a rod inserted into the arm, allowing for the contraction and relaxation of the muscle connected to the prosthesis and therefore promotes substantial use of the residual limb. Contrastingly, a cosmetic prosthesis has little functional value and usually leads to the non-use of the affected limb in most individuals who use one. The study concluded that individuals using the Sauerbruch prosthesis have substantially less PLP due to direct motor control of and somatosensory feedback from the prosthetic hand originating in the muscle of the residual limb than those using a cosmetic prosthesis.

The original Sauerbruch arm
Cosmetic Prosthesis
Depiction of the functionality of the Sauerbruch Prosthesis

Modern myoelectric prostheses function like the Sauerbruch prosthesis, however, they utilise electrodes in the prosthesis to detect nerve and muscle activity along the residual limb musculature, which triggers motors in the prosthetic to control and produce the movement intended.

Basic Diagram of a myoelectric limb

Final Thoughts:

The understanding of PLP and prosthetics as an adjuvant treatment allowed me to consider further; whether cosmesis of prosthetics(making artificial limbs look lifelike, similar to the original missing limb) aids the alleviation of PLP, as the somatosensory cortex also processes visual information.

My learning extended to another study suggesting that the correction of body perception may modulate PLP. This hypothesis stems from the prosthetic ownership concept, whereby prosthetic use is experienced as part of the body rather than an attached device foreign to it. This added to my insight into the prosthetic treatment of PLP as the brain combines visual input and direct cortical-somatosensory electrical stimulation by the prosthetic, creating a multisensory illusion that an artificial limb actually belongs to the body, thereby reverting the somatosensory cortex to a healthy state.

Overall, PLP accounts for a significant reduction in the quality of life of amputees; thus, the development of prostheses with somatosensory feedback and a cosmesis effect is a promising therapeutic tool to reduce PLP.

Stem cells and Neurodegeneration(Practice)

Should We Cross the Great Moral Divide? Maybe”

-Someone

Regenerative stem cell theory!!!

The brain is complex environment made of bundle of connections signalling and communicating with one another; when one of said connections is interrupted problems occur that can affect the entire body.

Parkinson’s is a neurodegenerative disease of the central nervous system, and pluripotent stem cells have been found to minimise it symptoms by replacing the dopamineregic neurons affected.