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18 August 2021 | Story André Damons | Photo André Damons
Dr Osayande Evbuomwan is a Senior Lecturer and medical specialist in nuclear medicine in the Department of Nuclear Medicine, Faculty of Health Sciences, at the University of the Free State (UFS).
The University of the Free State (UFS) Department of Nuclear Medicine has, for the first time, started using Lutetium 177 PSMA (Lu-177 PSMA) therapy for the treatment of metastatic castrate-resistant prostate cancer (MCRPC) – an advanced stage of prostate cancer.

The UFS and the Free State province are now joining other South African universities, such as the University of Pretoria, the University of the Witwatersrand, and other provinces in using this method to treat MCRPC patients. 

Dr Osayande Evbuomwan, a Senior Lecturer and medical specialist in the Department of Nuclear Medicine, Faculty of Health Sciences, says they have started treating their first MCRP patient (first cycle) with peptide receptor radionuclide therapy (PRRT) on 15 July. It is the first time that Lutetium 177 PSMA – a type of PRRT used for treating patients with MCRPC – has been used in the Free State. This method is used on MCRPC patients who are not eligible for chemotherapy or have failed first- or second-line chemotherapy.

Expertise and funds are now available for this treatment

Dr Evbuomwan was trained and exposed to this therapy at the University of the Witwatersrand during his registrar training in nuclear medicine. When he joined the UFS in 2019, he – with the always available help of the Head of Department, Dr Gerrit Engelbrecht – pushed for the therapy to be used in the department. 

“We in the Department of Nuclear Medicine are happy that expertise is now available and that some funds have been released for this treatment to commence. The index patient is very sick with MCRPC and was too sick to qualify for first-line chemotherapy. Each patient will need about four-six cycles for complete treatment. The patient is being treated in the Department of Nuclear Medicine at the Universitas Academic Hospital and Annex.” 

“We are hoping that he will be able to complete at least four cycles and respond well to the treatment. We believe that the ability to administer this treatment now is good news for the Free State, as the people of the Free State also deserve to be exposed to this level of treatment. We are hoping that the government will continue to provide more funds for more of these patients to be treated in our facility,” says Dr Evbuomwan.

It was budgeted to treat five patients (20 cycles), with each cycle (just the Lu-177 PSMA) costing more than R50 000. 

A googled image from the internet of a case before, during, and after completing the full course of therapy. The first image is before
treatment and the last image is after completing treatment, while the images in between are during treatment. (Source: Google) 

Prostate cancer one of the leading causes of morbidity and mortality

Dr Evbuomwan says prostate cancer is one of the leading causes of morbidity and mortality in the world, including South Africa. When it progresses to the advanced stage of MCRPC, the prognosis becomes bad. 

Dr Evbuomwan explains that there are various conventional systemic therapies, including first- and second-line chemotherapy that could be used to treat patients at this bad stage. However, not all patients are fit for chemotherapy. The few who are fit, according to Dr Evbuomwan, usually end up failing the first-line chemotherapy, which has a lot of undesirable side effects and require long-stay hospital admissions. 

Only a few centres are able to offer second-line chemotherapy. So many of these patients end up suffering from prolonged bone pains before eventually dying from the disease.

PRRT is a targeted nuclear medicine therapy that offers the opportunity to deliver very high levels of radiation specifically to cancer cells, because these cancer cells express specific receptors to which certain peptides can bind. This specificity to cancer cells offers the advantage of providing lower doses of radiation and damage to normal organs and tissues, a characteristic that conventional therapies do not offer, explains Dr Evbuomwan.  

According to him, Lutetium 177 PSMA (Lu-177 PSMA) is a type of PRRT used for treating patients with MCRPC, who are not eligible for chemotherapy or have failed first-line chemotherapy. Numerous research studies around the world have proven that this treatment improves quality of life, slows down disease progression, and improves overall survival, with little or very tolerable side effects in most patients. 

The University of Pretoria is one of the pioneers of this treatment in the world, having done a lot of research with it since 2017. Other provinces such as the Western Cape and KwaZulu-Natal have also recently become involved with the therapy. This therapy is expensive and requires a lot of expertise. It also involves the input of a multidisciplinary team (MDT), which must at least include a nuclear medicine physician, a radiation oncologist, and a urologist. The Departments of Urology and Radiation Oncology at the UFS were also instrumental in the initiation of the therapy and form part of the MDT team at the UFS in the management of these patients.

Treatment puts department, university, and hospital on the map

Dr Evbuomwan says the ability to administer this treatment puts the department, the UFS, and the hospital on the map, alongside other top universities within and outside the country. “It also creates an avenue for us to gather data for research purposes and for publications. We are now able to offer a promising, safe, and highly efficacious therapy for patients with MCRPC in the Free State. Some of these patients no longer need to travel to other provinces to get the treatment.”

There are plans to expand the treatment to more patients – and hospital management, who were present at the first treatment, are excited and looking forward to the outcome of this current treatment.

Watch video below:

News Archive

Inaugural lecture: Prof Robert Bragg, Dept. of Microbial, Biochemical and Food Biotechnology
2006-05-17



Attending the inaugural lecture were in front from the left Prof Robert Bragg (lecturer at the Department of Microbial, Biochemical and Food Biotechnology) and Frederick Fourie (Rector and Vice-Chancellor).  At the back from the left were Prof James du Preez (Departmental Chairperson:  Department of Microbial, Biochemical and Food Biotechnology) and Prof Herman van Schalkwyk (Dean: Faculty of Natural and Agricultural Sciences). Photo: Stephen Collett
 

A summary of an inaugural lecture delivered by Prof Robert Bragg at the University of the Free State:

CONTROL OF INFECTIOUS AVIAN DISEASES – LESSONS FOR MAN?

Prof Robert R Bragg
Department of Microbial, Biochemical and Food Biotechnology
University of the Free State

“Many of the lessons learnt in disease control in poultry will have application on human medicine,” said Prof Robert Bragg, lecturer at the University of the Free State’s (UFS) Department of Microbial, Biochemical and Food Biotechnology during his inaugural lecture.

Prof Bragg said the development of vaccines remains the main stay of disease control in humans as well as in avian species.  Disease control can not rely on vaccination alone and other disease-control options must be examined.  

“With the increasing problems of antibiotic resistance, the use of disinfection and bio security are becoming more important,” he said.

“Avian influenza (AI) is an example of a disease which can spread from birds to humans.  Hopefully this virus will not develop human to human transmission,” said Prof Bragg.

According to Prof Bragg, South Africa is not on the migration route of water birds, which are the main transmitters of AI.  “This makes South Africa one of the countries less likely to get the disease,” he said.

If the AI virus does develop human to human transmission, it could make the 1918 flu pandemic pale into insignificance.  During the 1918 flu pandemic, the virus had a mortality rate of only 3%, yet more than 50 million people died.

Although the AI virus has not developed human-to-human transmission, all human cases have been related to direct contact with infected birds. The mortality rate in humans who have contracted this virus is 67%.

“Apart from the obvious fears for the human population, this virus is a very serious poultry pathogen and can cause 100% mortality in poultry populations.  Poultry meat and egg production is the staple protein source in most countries around the world. The virus is currently devastating the poultry industry world-wide,” said Prof Bragg.

Prof Bragg’s research activities on avian diseases started off with the investigation of diseases in poultry.  “The average life cycle of a broiler chicken is 42 days.  After this short time, they are slaughtered.  As a result of the short generation time in poultry, one can observe changes in microbial populations as a result of the use of vaccines, antibiotics and disinfectants,” said Prof Bragg.   

“Much of my research effort has been directed towards the control of infectious coryza in layers, which is caused by the bacterium Avibacterium paragallinarum.  This disease is a type of sinusitis in the layer chickens and can cause a drop in egg product of up to 40%,” said Prof Bragg.

The vaccines used around the world in an attempt to control this disease are all inactivated vaccines. One of the most important points is the selection of the correct strains of the bacterium to use in the vaccine.

Prof Bragg established that in South Africa, there are four different serovars of the bacterium and one of these, the serovar C-3 strain, was believed to be unique to Southern Africa. He also recently discovered this serovar for the first time in Israel, thus indicating that this serovar might have a wider distribution than originally believed.

Vaccines used in this country did not contain this serovar.  Prof Bragg established that the long term use of vaccines not containing the local South African strain resulted in a shift in the population distribution of the pathogen.

Prof Bragg’s research activities also include disease control in parrots and pigeons.   “One of the main research projects in my group is on the disease in parrots caused by the circovirus Beak and Feather Disease virus. This virus causes serious problems in the parrot breeding industry in this country. This virus is also threatening the highly endangered and endemic Cape Parrot,” said Prof Bragg.

Prof Bragg’s research group is currently working on the development of a DNA vaccine which will assist in the control of the disease, not only in the parrot breeding industry, but also to help the highly endangered Cape Parrot in its battle for survival.

“Not all of our research efforts are directed towards infectious coryza or the Beak and Feather Disease virus.  One of my Masters students is currently investigating the cell receptors involved in the binding of Newcastle Disease virus to cancerous cells and normal cells of humans. This work will also eventually lead to a possible treatment of cancer in humans and will assist with the development of a recombinant vaccine for Newcastle disease virus,” said Prof Bragg.

We are also currently investigating an “unknown” virus which causes disease problems in poultry in the Western Cape,” said Prof Bragg.
 
“Although disinfection has been extensively used in the poultry industry, it has only been done at the pre-placement stage. In other words, disinfectants are used before the birds are placed into the house. Once the birds are placed, all use of disinfectants stops,” said Prof Bragg.

“Disinfection and bio security can be seen as the ‘Cinderella’ of disease control in poultry.  This is also true for human medicine. One just has to look at the high numbers of people who die from hospital-acquired infections to realise that disinfection is not a concept which is really clear in human health care,” said Prof Bragg.

Much research has been done in the control of diseases through vaccination and through the use of antibiotics. “These pillars of disease control are, however, starting to crumble and more effort is needed on disinfection and bio security,” said Prof Bragg.

Prof Bragg has been working in close co-operation with a chemical manufacturing company in Stellenbosch to develop a unique disinfectant which his highly effective yet not toxic to the birds.

As a result of this unique product, he has developed the continual disinfection program for use in poultry. In this program the disinfectant is used throughout the production cycle of the birds. It is also used to ensure that there is excellent pre-placement disinfection.

“The program is extensively used for the control of infectious diseases in the parrot-breeding industry in South Africa and the product has been registered in 15 countries around the world with registration in the USA in the final process,” said Prof Bragg.

“Although the problem of plasmid mediated resistance to disinfectants is starting to rear its ugly head, this has allowed for the opening of a new research field which my group will hopefully exploit in the near future,” he said.

 

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