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25 June 2019 | Story Leonie Bolleurs | Photo Barend Nagel
Marnus du Plooy
Marnus du Plooy, recipient of a Fulbright Scholarship, will depart for the Duke University in Durham, North Carolina, in August to complete a doctoral degree.

Marnus du Plooy will receive his master’s degree at the University of the Free State’s Winter Graduation Ceremony.

After completing his BSc degree in Microbiology, he discovered a passion for this field of research and enrolled for postgraduate studies in the Department of Microbial, Biochemical and Food Biotechnology at the UFS.

During his master’s, Du Plooy focused on the pathogenic yeasts, Cryptococcus neoformans and a related species, C. deneoformans.

Passion for science instilled at a young age

His passion for this field comes from a young age. “Both my parents were Science teachers and they instilled a love for Science in me. At school, I enjoyed the Science subjects the most and usually obtained my highest marks in these,” Du Plooy said. 

The pathogenic yeasts studied by Du Plooy, Cryptococcus neoformans and the sister species, C. deneoformans, often cause meningitis in immunocompromised individuals, such as in people living with HIV/Aids.

He pointed out: “Infection caused by these yeasts is right on the heels of TB as the second largest killer of HIV-positive patients in sub-Saharan Africa. The focus of my master’s project was to investigate new ways in which genes can be ‘switched off’ in these yeasts in order to study the role of the genes in virulence. Doing so could help to identify new drug targets for the treatment of this form of meningitis in subsequent studies.”

Expanding his international footprint

Although Du Plooy received his master’s degree from the UFS, he grabbed the opportunity to study abroad with both hands. He applied for and received a Fulbright scholarship from the Fulbright Foreign Student Programme, giving him the opportunity to study in the US.

“I did not expect to get very far with the application, as very few candidates are selected each year. I was very lucky to receive a Fulbright scholarship and an admission offer from Duke University for PhD studies in Microbiology,” said Du Plooy.

He hopes to continue with research on Cryptococcus and to contribute to improving the lives of HIV/Aids patients. “I have always been interested in pharmaceutical and medical research and noticed a need for better cryptococcal treatments, especially in sub-Saharan Africa. Cryptococcal meningitis is a neglected disease which claims more than 600 000 lives worldwide every year. The current treatment options are several decades old, with some only available in well-resourced areas.”

Du Plooy will depart for the US in August. “The duration of the degree is four to five years, where-after I will return to South Africa to apply what I have learned at home.”

News Archive

Stem cell research and human cloning: legal and ethical focal points
2004-07-29

   

(Summary of the inaugural lecture of Prof Hennie Oosthuizen, from the Department of Criminal and Medical Law at the Faculty of Law of the University of the Free State.)

 

In the light of stem cell research, research on embryo’s and human cloning it will be fatal for legal advisors and researchers in South Africa to ignore the benefits that new bio-medical development, through research, contain for this country.

Legal advisors across the world have various views on stem cell research and human cloning. In the USA there is no legislation that regulates stem cell research but a number of States adopted legislation that approves stem cell research. The British Parlement gave permission for research on embryonic stem cells, but determined that it must be monitored closely and the European Union is of the opinion that it will open a door for race purification and commercial exploitation of human beings.

In South Africa the Bill on National Health makes provision for therapeutical and non therapeutical research. It also makes provision for therapeutical embryonical stem cell research on fetuses, which is not older than 14 days, as well as for therapeutical cloning under certain circumstances subject to the approval of the Minister. The Bill prohibits reproductive cloning.

Research on human embrio’s is a very controversial issue, here and in the rest of the world.

Researchers believe that the use of stem cell therapy could help to side-step the rejection of newly transplanted organs and tissue and if a bank for stem cell could be built, the shortage of organs for transplants would become something of the past. Stem cells could also be used for healing of Alzheimer’s, Parkinson’s and spinal injuries.

Sources from which stem cells are obtained could also lead to further ethical issues. Stem cells are harvested from mature human cells and embryonic stem cells. Another source to be utilised is to take egg cells from the ovaries of aborted fetuses. This will be morally unacceptable for those against abortions. Linking a financial incentive to that could become more of a controversial issue because the woman’s decision to abort could be influenced. The ideal would be to rather use human fetus tissue from spontaneous abortions or extra-uterine pregnancies than induced abortions.

The potential to obtain stem cells from the blood of the umbilical cord, bone-marrow and fetus tissue and for these cells to arrange themselves is known for quite some time. Blood from the umbilical cord contains many stem cells, which is the origin of the body’s immune and blood system. It is beneficial to bank the blood of a newborn baby’s umbilical cord. Through stem cell transplants the baby or another family member’s life could be saved from future illnesses such as anemia, leukemia and metabolic storing disabilities as well as certain generic immuno disabilities.

The possibility to withdraw stem cells from human embrio’s and to grow them is more useable because it has more treatment possibilities.

With the birth of Dolly the sheep, communities strongly expressed their concern about the possibility that a new cloning technique such as the replacement of the core of a cell will be used in human reproduction. Embryonic splitting and core replacement are two well known techniques that are associated with the cloning process.

I differentiate between reproductive cloning – to create a cloned human embryo with the aim to bring about a pregnancy of a child that is identical to another individual – and therapeutically cloning – to create a cloned human embryo for research purposes and for healing human illnesses.

Worldwide people are debating whether to proceed with therapeutical cloning. There are people for and against it. The biggest ethical objection against therapeutical cloning is the termination of the development of a potential human being.

Children born from cloning will differ from each other. Factors such as the uterus environment and the environment in which the child is growing up will play a role. Cloning create unique children that will grow up to be unique individuals, just like me and you that will develop into a person, just like you and me. If we understand this scientific fact, most arguments against human cloning will disappear.

Infertility can be treated through in vitro conception. This process does not work for everyone. For some cloning is a revolutionary treatment method because it is the only method that does not require patients to produce sperm and egg cells. The same arguments that were used against in vitro conception in the past are now being used against cloning. It is years later and in vitro cloning is generally applied and accepted by society. I am of the opinion that the same will happen with regard to human cloning.

There is an argument that cloning must be prohibited because it is unsafe. Distorted ideas in this regard were proven wrong. Are these distorted ideas justified to question the safety of cloning and the cloning process you may ask. The answer, according to me, is a definite no. Human cloning does have many advantages. That includes assistance with infertility, prevention of Down Syndrome and recovery from leukemia.

 

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