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31 March 2020 | Story Leonie Bolleurs | Photo Supplied
UFS Covid-19 vaccine research team
Prof Robert Bragg and members of the Veterinary Biotechnology research group believe that finding a vaccine for COVID-19 will not be a ‘quick fix’. From the left are: Prof Bragg, Samantha McCarlie, Liese Kilian, and Dr Charlotte Boucher-van Jaarsveld. The photo was taken during the World Veterinary Poultry Association congress in Thailand in 2019.

On 31 March 2020, there were 804 061 coronavirus cases and 39 064 deaths globally due to the outbreak. According to media reports, there is still no licensed vaccine for COVID-2019 – the cause of our current global health emergency.  

Prof Robert Bragg, researcher at the University of the Free State (UFS), says this is without a doubt the most pressing research need in the world today. 

The Veterinary Biotechnology research group in the Department of Microbial, Biochemical, and Food Biotechnology at the UFS recently submitted an article for publication on the design of a possible COVID-19 vaccine, based on work they have done on infectious bronchitis virus (also a coronavirus). The article, authored by the group of which Prof Bragg is a member, is titled: A sub-unit vaccine produced in 'Yarrowia lipolytica' against COVID-19: Lessons learnt from infectious bronchitis virus. 

The research group, consisting of researchers and postgraduate students, is mostly looking at strategies for improved disease control, mainly in avian species, through vaccine development, treatment, and biosecurity.

Prof Bragg says their main aim with this study was to get the research out there so that the bigger pharmaceutical companies could take up the design of a possible COVID-19 vaccine and assist with the development of a vaccine. 

He says the research group’s role in this lengthy process would be to express the protein, which could be used in the development of a possible vaccine. “Thereafter, it will have to be taken up by a vaccine manufacturer to get the vaccine made and to the market.”

Developing a vaccine
Liese Kilian, a member of the research group, finished writing up her MSc thesis in Microbiology in the UFS Department of Microbial, Biochemical, and Food Biotechnology in December 2019 – the same time that COVID-19 originated in China. She has been working on the development of an edible sub-unit vaccine against the infectious bronchitis virus (IBV), which is a widespread avian coronavirus. This virus is specific to poultry and is different from COVID-19. 

Kilian’s project was conducted under the supervision of Prof Bragg and Dr Charlotte Boucher-van Jaarsveld. Dr Boucher-van Jaarsveld is a research fellow in the university’s Department of Microbial, Biochemical and Food Biotechnology.

Kilian, with the assistance of Samantha Mc Carlie, currently a master’s student in the research group, substituted the genetic code of the IBV with the genetic code of the COVID-19 virus, which were already published at that stage. Thus, a gene for the development of a possible sub-unit vaccine against the S1 spike protein of COVID-19 was developed for expression in the same yeast strain used to express the spike protein of IBV. A sub-unit vaccine can be described as part of a pathogen, triggering an immune response against the pathogen from which it is derived.

After Killian successfully developed the gene for this study, she expressed the S1 spike protein of the IBV in a yeast-based expression system developed by the research group. Dr Boucher-van Jaarsveld says this simply means that the yeast takes up the foreign genetic material (viral gene) into its own genetic make-up and makes more of this protein as if it is part of the yeast’s normal material. 

“The images of COVID-19 are being shown constantly in the media and the ‘spikes’ can be seen on all of these images. These spikes are very typical for all coronaviruses and there is some level of similarity between the structure of these spikes in many of the coronaviruses,” Prof Bragg adds.

According to the World Health Organisation, the spike protein is a promising candidate for a sub-unit vaccine due to its immunogenicity and safety, as well as manufacturing and stability considerations during large-scale development.

Prof Bragg says there are many different expression systems that are widely used. Producing the sub-unit vaccine in a yeast species is beneficial for the work they are doing. A yeast expression system is favourable as large-scale production, is less expensive compared to mammalian cell lines, and can be applied as an edible vaccine.

“The technology to grow massive volumes of yeast are also very well established. This, after all, is how beer is made!” Prof Bragg says. Dr Boucher-van Jaarsveld adds: “The expression of an antigen is not necessarily just geared towards vaccines but can also be used in the development of diagnostic tests to screen populations for infections.”

Working with other researchers
“Now that the situation is all but out of control, we maybe need to investigate the possibilities of working with other key researchers at the UFS as well as other universities in South Africa to develop the vaccine or diagnostic reagents locally. Discussions on this aspect are already underway.”

Several other universities in South Africa are also working to find a cure for the virus. Government availed funding for more research on the matter. According to Higher Education, Science and Technology Minister, Blade Nzimande, the University of Cape Town, the Council for Scientific and Industrial Research, as well as the Vaccines Institute of Southern Africa are working on the development of a vaccine.

Prof Bragg expressed the hope of obtaining funding for this work. “Because without funding, we will not be able to do anything with this data,” he says. They are currently investigating different funding options. 

“The sooner we start on the development of a vaccine, the sooner there will be one, but it will not be a ‘quick fix’. It must be stressed that, even if vaccine development is fast-tracked through the regulatory bodies, it will take many months (if not years) to move from the laboratory to the first human experimentation. It will take even longer before any human vaccine can be rolled out,” says Prof Bragg.



News Archive

Moshoeshoe - lessons from an African icon - by Prof Frederick Fourie
2004-11-03

(The full text of the article that appeared in City Press and Sunday Independent)

Our understanding of history informs our understanding of the present. No wonder the contestation over historical figures in South Africa’s past is so fierce and so divisive.
The question is: could it be any other way? I would like to think that it could; that black and white South Africans, across linguistic, cultural, religious and other divides, can develop a shared appreciation of our history – at least with certain periods and personalities as a starting point.

One such personality whose legacy I believe offers a possible platform for unifying our still divided country is King Moshoeshoe, who lived from 1786 to 1870, and is acknowledged as the founder of the Basotho.

King Moshoeshoe is the topic of a documentary that has been commissioned by the University of the Free State as part of its Centenary celebrations this year. It is part of a larger project to honour and research the legacy of Moshoeshoe. The documentary will be screened on SABC 2 at 21:00 on November 4th.

Moshoeshoe rose to prominence at a time of great upheaval and conflict in South Africa – the 19th century, a time when British colonialism was entrenching itself, when the Boer trekkers were migrating from the Cape and when numerous indigenous chiefdoms and groupings were engaged in territorial conquests. It was the time of the Difaqane, a period when society in the central parts of the later South Africa and Lesotho was fractured, destabilised and caught in a cycle of violence and aggression.

In this period Moshoeshoe displayed a unique and innovative model of leadership that resulted in reconciliation, peace and stability in the area that later became Lesotho and Free State. It made him stand out from many of his contemporaries and also caught the attention of his colonial adversaries.

Such an evaluation is not a judgment about which model of leadership is right and which is wrong, or which leader was better than another; but merely an attempt to explore what we can learn from a particular exemplar.
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Historians point to the many progressive leadership qualities displayed by Moshoeshoe which he used effectively in establishing the Basotho nation and in defending it.
First, there is his humanism and sense of justice worthy of any great statesman. Confronted by a situation in which cannibals murdered and devoured his grandfather, Moshoeshoe chose not to take revenge. Instead he opted to rehabilitate them and feed them as he believed hunger drove them to cannibalism.

Secondly, there is his skilful alliance-building with his contemporaries such as Shaka in an attempt to neutralize those rivals who were intent on attacking his followers. This is also displayed in the way he sought the protection of the British to keep the Boer forces at bay.
Thirdly, his emphasis on peaceful options is also seen in his defensive military strategy which saw him retreat to a mountain fortress to be able to protect and build a burgeoning nation in the face of the many forces threatening its survival.

Fourthly, there is his remarkable inclusivity and tolerance for diversity which saw him unite disparate groups of refugees from the violence and hunger that displaced them and then weld them into the Basotho nation. He also engaged with French missionaries, inviting them to stay with him and advise him on Western thought, technology and religion.
These are but some of the qualities which belie the notion that all 19th century African leaders were merely marauders and conquerors that gained their ascendancy through violence. Instead Moshoeshoe is a prime example of the human-centred, democratic and pluralist roots of South African, indeed African society.

The Moshoeshoe project that we have initiated (of which the documentary, called “The Renaissance King”, forms but one part) derives from our location as a university in the Free State, a province with a particular history and a particular political culture that developed as a result of this very model of leadership. This province has benefited tremendously from leaders such as Moshoeshoe and president MT Steyn, both of whom many observers credit with establishing a climate of tolerance, respect for diversity of opinion, political accommodation and peaceful methods of pursuing political objectives in the province. Their legacy is real – and Moshoeshoe’s role can not be overstated.
In addition the project derives from the University of the Free State being a site of higher learning in a broader geo-political sense. As a university in Africa we are called upon to understand and critically engage with this history, this context and this legacy.
Besides the documentary, the UFS is also planning to establish an annual Moshoeshoe memorial lecture which will focus on and interrogate models of African leadership, nation-building, reconciliation, diversity management and political tolerance.

In tackling such projects, there may be a temptation to engage in myth-making. It is a trap we must be wary of, especially as an institution of higher learning. We need to ask critical questions about some aspects of Moshoeshoe’s leadership but of current political leadership as well. Thus there is a need for rigorous academic research into aspects of the Moshoeshoe legacy in particular but also into these above-mentioned issues.
While the documentary was commissioned to coincide with the University of the Free State’s centenary and our country’s ten years of democracy, it is a project that has a much wider significance. It is an attempt to get people talking about our past and about our future, as a campus, as a province and as a country – even as a continent, given the NEPAD initiatives to promote democracy and good governance.

The project therefore has particular relevance for the continued transformation of institutions such as universities and the transformation of our society. Hopefully it will assist those who are confronted by the question how to bring about new institutional cultures or even a national political culture that is truly inclusive, tolerant, democratic, non-sexist, non-racial, multilingual and multicultural.

I believe that the Moshoeshoe model of leadership can be emulated and provide some point of convergence. A fractured society such as ours needs points of convergence, icons and heroes which we can share. Moshoeshoe is one such an African icon – in a world with too few of them.

Prof Frederick Fourie is the Rector and Vice-Chancellor of the University of the Free State

* The documentary on “Moshoeshoe: The Renaissance King” will be screened on SABC2 on 4 November 2004 at 21:00.

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