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21 June 2024 | Story André Damons | Photo Suplied
Dr Claudia Ntsapi
Dr Matlakala C Ntsapi is a Senior Lecturer and researcher in the Department of Basic Medical Sciences at the UFS.

A researcher from the University of the Free State (UFS) is investigating the potential benefits of medicinal plants as supplementary treatments for neurodegenerative diseases such as Alzheimer’s, Parkinson’s and Huntington’s diseases.

The work of Dr Matlakala Claudia Ntsapi, Senior Lecturer in the Department of Basic Medical Sciences at the UFS, focuses on preserving human brain health to delay or prevent age-related conditions.

According to her, while the primary focus is on age-related neurodegenerative diseases such as Alzheimer’s, Parkinson’s, and Huntington’s, the bioactive compounds in these medicinal plants may also have therapeutic potential for other neurological disorders, various types of cancers and Type 2 Diabetes. The broad protective effects of these plant-based bioactive compounds could make them relevant in the potential treatment of other diseases involving oxidative stress and inflammation.

She is involved in several multidisciplinary projects, collaborating with research experts from Denmark, the UK, and various national institutions such as the Central University of Technology (CUT), North West University (NWU), and the Stellenbosch University (SUN), as well as colleagues from the UFS. 

The potential of medicinal plants

“In collaboration with experts from our institution, the CUT and SU, who have strong backgrounds in pharmacology and ethnobotany, we are focusing on underexplored medicinal plants and nutraceuticals. These plants contain bioactive compounds with potential neuroprotective properties, which are believed to provide extra health benefits beyond basic nutritional value,” says Dr Ntsapi.

“We hope that these medicinal plants have the potential to preserve cognitive function and slow the progression of neurodegenerative diseases like Alzheimer’s. Specifically, we aim to identify novel therapeutic targets and discover new avenues for intervention that can improve the quality of life for individuals affected by age-related brain conditions,” she says.

Identifying therapeutic targets and discovering new interventions

The bioactive compounds found in selective medicinal plants and nutraceuticals, explains Dr Ntsapi, serve as a promising source of ‘natural’ therapeutics that may be safer and have fewer side effects compared to conventional synthetic drugs. Additionally, the untapped potential of these compounds for neuroprotection and the preservation of brain health could provide innovative therapeutic solutions. These compounds may be used as complementary therapies to existing drugs, which often have limited efficacy on their own, thereby enhancing overall treatment outcomes for neurodegenerative diseases.

“By utilising cutting-edge techniques, such the innovative CelVivo ClinoStar 2 System, we strive to gain insights into the safety and efficacy of underexplored medicinal plants in preserving cognitive function and slowing disease progression.

“By exploring the untapped potential of bioactive compounds found in medicinal plants and nutraceuticals, our research group aims to contribute to the identification of novel therapeutic targets and the discovery of new avenues for intervention to improve the quality of life for individuals affected by age-related brain conditions,” says Dr Ntsapi.

The researchers, in collaboration with others in the UFS School of Clinical Medicine, will develop 3D cell-based models of the human cortex and hippocampus by utilising the CelVivo ClinoStar 2 System. This cutting-edge technology, housed in an easy-to-use CO² incubator, mimics ‘animal model-like’ conditions with low sheer stress, allowing scientists to generate cell-based models that closely resemble real-world conditions.

Dr Ntsapi explains that they will specifically focus on the technologies’ applications in studying age-related neurodegenerative disorders, such as Alzheimer’s disease. The potential impact of this research is immense, as it could contribute to the development of novel therapeutic strategies for combating the debilitating progression of neurodegenerative diseases, and ultimately improving the quality of life for affected individuals.

Hope for the research

“Our hope for this research is to significantly advance our understanding of neurodegenerative disease progression and to develop novel therapeutic strategies that can effectively combat these debilitating conditions. Ultimately, we aim to improve the quality of life for individuals affected by neurodegenerative diseases by preserving cognitive function and slowing disease progression.

“This research will contribute to the knowledge pool in this field, with the potential to lead to groundbreaking discoveries in the treatment of Alzheimer’s disease and other related disorders, potentially contributing to the policy guidelines on how these conditions are managed and treated,” she says.

The international partners from Denmark and the UK have made their expertise and facilities available to postgraduate students from the UFS, some of whom they are co-supervising.

Dr Ntsapi, who is passionate about exploring innovative solutions to address the gradual decline in normal brain function associated with aging, was this year one the university’s nominations for the prestigious 2023/2024 NSTF-South32 Awards, popularly known as the “Science Oscars” of South Africa. 

News Archive

To tan or not to tan: a burning issue
2009-12-08

 Prof. Werner Sinclair

“Some evidence exists which implies that sunscreens could indeed be responsible for the dramatic rise in the incidence of melanoma over the past three decades, the period during which the use of sunscreens became very popular,” says Prof. Werner Sinclair, Head of the Department of Dermatology at the University of the Free State. His inaugural lecture was on the topic Sunscreens – Curse or Blessing?

Prof. Sinclair says the use of sunscreen preparations is widely advocated as a measure to prevent acute sunburn, chronic sun damage and resultant premature skin aging as well as skin malignancies, including malignant melanoma. There is inconclusive evidence to prove that these preparations do indeed achieve all of these claims. The question is whether these preparations are doing more harm than good?

He says the incidence of skin cancer is rising dramatically and these tumours are induced mostly by the ultra-violet rays.

Of the UV light that reaches the earth 90-95% belongs to the UVA fraction. UVC is normally filtered out by the ozone layer. UVB leads to sunburn while UVA leads to pigmentation (tanning). Because frequent sunburn was often associated with skin cancer, UVB was assumed, naively, to be the culprit, he says.

Exposure to sunlight induces a sense of well-being, increases the libido, reduces appetite and induces the synthesis of large amounts of vitamin D, an essential nutritional factor. The use of sunscreen creams reduces vitamin D levels and low levels of vitamin D have been associated with breast and colon cancer. Prof. Sinclair says the 17% increase in breast cancer from 1981 to 1991 parallels the vigorous use of sunscreens over the same period.

Among the risk factors for the development of tumours are a family history, tendency to freckle, more than three episodes of severe sunburn during childhood, and the use of artificial UV light tanning booths. He says it remains a question whether to tan or not. It was earlier believed that the main carcinogenic rays were UVB and that UVA merely induced a tan. The increase in UVA exposure could have severe consequences.

Prof. Sinclair says the UV light used in artificial tanning booths consists mainly of pure UVA which are highly dangerous rays. It has been estimated that six per cent of all melanoma deaths in the UK can be directly attributed to the use of artificial tanning lights. The use of an artificial tanning booth will double the melanoma risk of a person. “UVA is solely responsible for solar skin aging and it is ironical that tanning addicts, who want to look beautiful, are inflicting accelerated ageing in the process,” he says.

On the use of sunscreens he says it can prevent painful sunburn, but UVA-induced damage continues unnoticed. UVB blockers decrease vitamin D synthesis, which is a particular problem in the elderly. It also prevents the sunburn warning and therefore increases the UVA dosage that an individual receives. It creates a false sense of security which is the biggest problem associated with sunscreens.

Evidence obtained from the state of Queensland in Australia, where the heaviest and longest use of sunscreens occurred, boasted the highest incidence of melanoma in the world. A huge study in Norway has shown a 350% increase in melanoma for men and 440% for women. This paralleled the increase in the use of UVB blocking sunscreens while there was no change in the ozone layer. It did however, occur during that time when tanning became fashionable in Norway and there was an increase especially in artificial tanning.

Prof. Sinclair says: “We believe that sunscreen use does not directly lead to melanoma, but UVA exposure does. The Melanoma Epidemic is a reality. Sunscreen preparations are not the magical answer in the fight against melanoma and the irresponsible use of these preparations can worsen the problem.”

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt.stg@ufs.ac.za
7 December 2009

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