Religious leaders have raised ethical doubts over one of Australia’s primary coronavirus vaccine hopes because scientists have used foetal cells in its development.
Developers at Oxford University and pharmaceutical firm AstraZeneca are using cell lines from an electively aborted foetus in the vaccine candidate, with Anglican, Catholic and Greek Orthodox leaders questioning the practice.
But using foetal cells in vaccine development isn’t new — and the Catholic Church has previously expressed qualified support for the use of vaccines derived from these cells under certain circumstances.
We spoke to Bill Lott, a virologist at QUT’s Institute of Health and biomedical innovation, to understand the role of foetal cells in vaccine development.
The foetuses used are from decades ago
The foetal cells used in vaccine development are derived from a small number of foetuses which were ‘legally’ terminated decades ago.
The Oxford vaccine uses HEK (human embryonic kidney) 293 cell lines, obtained from a female foetus in the Netherlands in 1973.
“We’re using tissues that were from foetuses that were aborted 40, 50, 60 years ago,” Dr Lott said.
“It doesn’t require newly aborted foetuses.”
While living human cells can only divide around 50 times, those foetal cells have been genetically modified so they can divide an infinite number of times.
“That’s why we can use the cells that we harvested [decades ago] today,” Dr Lott said.
This means we’ll never need to replace specimens used in development.
“Just by analogy, buying ivory is illegal [because] if you create a market for ivory, then it creates the demand to kill more elephants,” Dr Lott said.
“In this case, that’s not happening because these foetuses were aborted 60 years ago, 50 years ago, and using these immortalised tissues now is not going to create a need to go and get new ones.”
In fact, scientists would prefer to keep using HEK 293 cell lines — because they have been repeatedly tried and tested in a laboratory setting and found to be safe.
“When you’re making a vaccine you require safety testing,” Dr Lott said.
“If we went back and used a different cell type, you’re throwing an unknown into the consideration.
“So that will severely slow down your ability to make these things.
Authorities say Oxford vaccine developed ‘against the highest of ethical standards’
This week, Australia’s Deputy Chief Medical Officer Nick Coatsworth pointed out the use of foetal cells had been a “reality” in past vaccine development.
“The human cell is a really important part of their development.
“There are strong ethical regulations surrounding the use of any type of human cell, particularly foetal human cells.
“This is a very professional, highly powered research unit at Oxford University.
“I think we can have every faith that the way they have manufactured the vaccine has been against the highest of ethical standards internationally.”
Foetal cells work as a ‘vaccine factory’
So, how do foetal cells help with vaccine development? Dr Lott explained they operate like a “vaccine factory”.
First, scientists need to develop the vaccine candidate and then combine it with an adenovirus vector.
An adenovirus is a particular type of common virus that causes illnesses like bronchitis, pneumonia and a sore throat.
For instance, when you get a cold, you may be infected with an adenovirus, a coronavirus or a rhinovirus.
A vector is an organism that spreads infection by moving pathogens from one host to another.
So an adenovirus vector? “That’s an adenovirus that has been sort of emptied out and then you put a different kind of genome in there to make protein,” Dr Lott said.
The next step is to put the vaccine/adenovirus vector combination into a big vat of foetal cells.
“One reason why you use the HEK 293 is because you get essentially 100 per cent infection with the adenoviral vector.
“And what it does is it turns the HEK 293 cells into a vaccine factory.”
What do we mean by “vaccine factory”? Dr Lott explains foetal cells begin producing “tons and tons of that modified adenovirus” which they then “spit out into the liquid bit of the cells” called the cell culture media.
“[The foetal cells] start cranking out this massive amount of modified adenovirus, and then you purify those things away from the cell tissue,” he said.
“And that’s what your vaccine is.”
The foetal cells will operate as this “vaccine factory” regardless of whether the vaccine is effective or not — so the next step generally involves animal and then human trials of varying scale.
If the vaccine works, there will be no foetal cells in the final product
Inherent in the whole process is stripping away the conditioned cell media, where the foetal cells are contained.
That means a successful vaccine developed using foetal cells will have no remnants of those cells in the final product.
“You purify the vaccine away from the cells that they were grown in, and then you destroy all the cells,” Dr Lott said.
“So then you’re going to take that liquid and you’ll purify it some more, but there are not going to be any [foetal] cells in there.
“There’s nothing left when it becomes the vaccine that gets delivered.”
They’re also used in medical treatment — but there’s a difference
Foetal tissue has been used with innovative effect in various strands of medical research.
The difference is some of those processes require fresh foetal cells — not the “immortalised” cells vaccine developers can use.
“The vaccine work is pretty straightforward,” Dr Lott said.
Scientists studying Zika virus used foetal cells to discover that the virus crossed the placental membrane and caused brain damage in unborn foetuses.
“[That research] brought out a whole raft of therapies and protections for unborn foetuses [and] “saved a lot of lives, including [the lives of] unborn foetuses,” Dr Lott said.
Foetal cells have helped develop the chicken pox and rubella vaccines
Foetal cell lines have been used in the development of various vaccines, including for chicken pox, Ebola, polio, rubella, shingles, Hepatitis A, and rabies.
Foetal tissue has also facilitated breakthroughs in the treatment of various medical issues including cystic-fibrosis, haemophilia, IVF, Parkinson’s and Alzheimer’s diseases, AIDS, and spinal cord injuries.
Why are some coronavirus vaccines using foetal cells and some aren’t?
Scientists have many different methodologies for developing vaccines and there are a variety of reasons why foetal cells aren’t always used.
“Some of them don’t use it because of ethical issues,” Dr Lott said.
“Some of them don’t use it because they’re not using an adenovirus [vector], so they don’t really need the HEK 293.
“And there are other [development] strategies.
“There’s an mRNA strategy that’s very popular.
“So some of them don’t require it.”
The development of a coronavirus vaccine was time critical because of the virus’ devastating public health and economic impacts, Dr Lott said.
Therefore, it was important for scientists to diversify their methodologies in order to develop a vaccine as quickly as possible.
Difference between foetal cells and stem cells
Both stem cells and foetal cells are critical to innovations in medical research — but what’s the difference between the two?
Dr Lott explains stem cells are basically the earliest iteration of a foetal cell — before the cell differentiates itself into, for example, a hair cell, liver cell, eye cell or skin cells.
“That first embryonic stem cell can eventually turn into any kind of cell in your body.
“So you’ve got embryonic stem cells, and then you’ve got adult stem cells, and in between are the foetal stem cells [which] are partially differentiated.
“So foetal cells contain not only stem cells — some of the foetal cells have already differentiated into their final cell type.”
Religious leaders have grappled with this in the past
In 2005 and again in 2017, the Catholic Church expressed qualified support for the use of foetal-cell-derived vaccines — but only if there was no available alternative.
“As regards the diseases against which there are no alternative vaccines which are available and ethically acceptable, it is right to abstain from using these vaccines if it can be done without causing children, and indirectly the population as a whole, to undergo significant risks to their health,” the Pope wrote.
“However, if the latter are exposed to considerable dangers to their health, vaccines with moral problems pertaining to them may also be used on a temporary basis.
Catholic parents could vaccinate their children with a “clear conscience” that “the use of such vaccines does not signify some sort of cooperation in voluntary abortion”.
Earlier this year and in the context of the coronavirus vaccine race, John Di Camillo, an ethicist with the National Catholic Bioethics Center, confirmed:
“One is allowed to make use of [vaccine derived from foetal tissue] where there’s a serious threat to the health or life of the individual, or of the greater population.
“This does not amount to a strict obligation to use it, but it certainly can be a legitimate choice in conscience if there’s that serious reason, and there’s no other reasonable alternative.”
The Oxford vaccine uses HEK (human embryonic kidney) 293 cell lines, obtained from a female foetus in the Netherlands in 1973.
Abortion in the Netherlands a short history
Abortion is legally regulated in the Netherlands.
All this was preceded by stirring times and political and social tension in the sixties of the last century. The Beahuis & Bloemenhovekliniek abortion clinic in Heemstede played an important role in the legalisation and acceptance of abortion in the Netherlands.
Until the sixties, abortion was seen as a ‘crime against decency’. Gynaecologists only carried out an abortion on medical indication. Women with an unwanted pregnancy who wanted an abortion were referred to the clandestine circuit, with all its medical and judicial risks.
In 1971, the first plans to set up a specialised abortion clinic in Beverwijk (a city 20 KM Northwest of Amsterdam) were prepared.
On 7 July 1971, the ‘Beahuis’ abortion clinic started up, with two specially-trained GPs and a small team of nurses and staff.
The Beahuis immediately met a great demand. After three patients on the first day, on the second day, all five beds were occupied. As early as day three, the first patients from abroad appeared. More wards were added, and very soon twelve women a day were being treated, six days a week. By the end of 1971, 1,170 abortions had been conducted in Beverwijk.
Currently, 3,000 abortion treatments occur annually at the Beahuis & Bloemenhovekliniek.
In 1973, the current premises of the Beahuis & Bloemenhovekliniek in Heemstede were purchased.
On the one hand this was because of the great stream of patients, and on the other because the clinic started to perform pregnancy termination between the 12th and 18th week. For this ‘second trimester treatment’, the ‘Bloemenhovekliniek’ was set up, and it occupied the building together with the Beahuis. This separation was also opted for to prevent the law possibly wanting to close the entire clinic, due to the expected criticism of the treatment in the second trimester of pregnancy.
Abortion clinics have always had their supporters and opponents. Indignant citizens, churches and politicians turned fervently against abortion in the early 70s. In 1975, Minister of Justice Van Agt called for an ‘ethical awakening’ and was an outspoken opponent of the legalisation of abortion. Against this, supporters took to the streets, such as the Dolle Minas with their slogan: ‘Boss in my own belly’.
With an occupation in 1976, the Women’s Movement was also able to prevent a threatened closure of the ‘Bloemenhovekliniek’ abortion clinic by Minister Van Agt. It is partly thanks to the Women’s Movement’s fight that abortion has gained an accepted place in society.
The fact that they admit that the vaccine uses cell tissue from a child way back in 1973 should not ease anyone’s conscience. In fact rather that alleviate them from any sense of malpractice it confirms their guilt.
Note that back in 1973 abortions in the Netherlands were still in their infancy, and in fact illegal, and yet this tissue wound up in the hands of researchers in Oxford. Note also this clinic became the centre for 12 – 18 week terminations in 1973. Does this mean the kidney cells were taken from a child in this stage? I think so. Therefore they have blood on their hands in the development of this vaccine, and who knows what else?
Apart from the obvious safety reasons in the development of this vaccine, here is another reason to reject this vaccine outright,