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14 November 2019 | Story Charlene Stanley | Photo Supplied
DIABETES read more
The modern clinical research facilities at FARMOVS where the two ground breaking diabetes studies will be conducted.

Diabetes is no longer seen simply as a disease, but as a worldwide epidemic, with alarming increases recorded in both developed and developing countries over the past few years.

About 3,5 million South Africans have diabetes, and many more are unaware that they have it. 

The FARMOVS clinical research facility on the Bloemfontein Campus of the University of the Free State is currently involved in two exciting research studies that could lead to the development of medication for diabetes sufferers burdened by some of its most common complications.

Diabetes in a nutshell

Diabetes is a group of diseases where the sugar (glucose) levels in the blood are too high. 

In diabetes mellitus (DM), the high blood-sugar levels are caused by the body not being able to control the blood-sugar levels properly, because of the body’s inability to produce or use insulin. Insulin is a hormone produced by the pancreas and lowers the blood-sugar levels by helping to move the sugar from the blood into the body cells where the sugar is used as a source of energy.

Type 1 DM is often diagnosed in children or teenagers and occurs when the pancreas does not produce any insulin. Type 2 DM occurs when the pancreas does not make enough insulin, or if the body can no longer use the insulin properly; this is often associated with poor lifestyle choices. Where this type of diabetes used to develop primarily in adults of 40 years and older, it is nowadays not uncommon for children to be diagnosed with it.


It is essential that people who are displaying one or more of the risk factors go for screening. This includes a search Physician at FARMOVS. “If DM is detected early enough, up to 90% of people don’t have to use medication but can address it through changes to their diet and exercise programmes.”

High blood-sugar levels essentially damage the blood vessels, which can lead to long-term implications for a person’s heart, kidneys, eyes, and blood circulation. 
The international studies that FARMOVS forms part of, aim to develop treatments for two of the most common secondary conditions that develop as a result of diabetes. 

Diabetic gastroparesis study

A sufferer’s intestines often don’t function properly due to the damage diabetes causes to the nerves which helps the stomach to empty properly; a condition called gastroparesis. Alleviating this condition, typically marked by abdominal pain, bloating, nausea, vomiting, and early satiety (feeling full after eating only a small amount of food), is the aim of one of the studies.

Diabetic impaired kidney function study

A second research study focuses on developing medication that will have a protective effect on a diabetic’s kidneys.  Although nothing can be done to reverse kidney damage, it is hoped that the treatment will slow down kidney degradation.

Focus on prevention

“Both of these studies are aimed at giving diabetics an increased quality of life, and by no means constitute a cure for their condition,” says Dr Van Jaarsveld.
 “The solution lies in combining the correct and committed use of medication with a decreased calorie intake and an increase in exercise – even if it’s just 30 minutes three times a week.”

Value of educating sufferers

A major benefit for participants in the FARMOVS diabetes research trials, is that they gain valuable insight in their own condition.
Diabetes has been called the ‘silent disease’, since sufferers initially have no symptoms.  For that reason, when the average patient is diagnosed with the disease, he/she already has had it for 10 years.   

For me, diabetes is such a sad disease – especially when you see patients with amputated body parts, knowing that it could have been prevented. It is really up to each individual to take responsibility for their own health,” Dr Van Jaarsveld concludes.

Diabetics who are interested in becoming part of the research studies can register online at www.farmovs.com, or contact FARMOVS at +27 51 410 3111.

News Archive

UFS study on cell development in top international science journal
2008-09-16

A study from the University of the Free State (UFS) on how the change in the packaging of DNA with cell development influenced the expression of genes, will be published in this week’s early edition of the prestigious international, peer-reviewed science journal, the Proceeding of the National Academy of Sciences of the USA (PNAS).

The PNAS journal has an impact factor of 10, which means that studies published in the journal are, on average, referred to by ten other scientific studies in a two year period. The South African Journal of Science, by comparison, has an impact factor of 0.7.

The UFS study, funded by the Wellcome Trust and the National Research Foundation (NRF), looked at how the change in the packaging of DNA with cell development influenced the expression of genes. It is very relevant to research on stem cells, an area of medicine that studies the possible use of undifferentiated cells to replace damaged tissue.

Prof. Hugh Patterton, of the Department of Microbial, Biochemical and Food Biotechnology at the UFS, who led the study, said: "We are extremely proud of this study. It was conceived in South Africa, it was performed in South Africa, the data were analysed in South Africa, and it was published from South Africa."

When a gene is expressed, the information encoded in the gene is used to manufacture a specific protein. In eukaryotes, which include humans, there is approximately 1m of DNA, containing the genes, in every cell. This length of DNA has to fit into a cell nucleus with a diameter of only about 10 micrometer. In order to fit the DNA into such a small volume, eukaryotic cells wrap their DNA onto successive protein balls, termed nucleosomes. Strings of nucleosomes, resembling a bead of pearls, is folded into a helix to form a chromatin fiber. The study from the UFS investigated how the binding of a specific protein, termed a linker histone, that binds to the length of DNA between nucleosomes, influenced the formation of the chromatin fiber and also the activity of genes.

"We found that the linker histone bound to chromatin in yeast, which we use as a model eukaryote, under conditions where virtually all the genes in the organism were inactive. It was widely believed that the binding of the linker histone caused the inactivation of genes. We studied the relationship between the amount of linker histone bound in the vicinity of each gene and the expression of that gene for all the genes in yeast, using genomic techniques. We made the surprising discovery that even through the linker histone preferentially bound to genes under conditions where the genes were shut off, this inactivation of genes was not caused by the binding of the linker histone and folding of the chromatin,” said Prof. Patterton.

He said: “Instead our data strongly suggested that the observed anti-correlation was due to the movement of enzymes along the DNA molecule, involved in processing the information in genes for the eventual manufacture of proteins. This movement of enzymes displaced the linker histones from the DNA. This finding now requires a rethink on aspects of how packaging of DNA influences gene activity."

Prof. Patterton said that his research group, using the Facility for Genomics and Proteomics as well as the Bioinformatics Node at the UFS, was currently busy with follow-up studies to understand how other proteins in nucleosomes affected the activities of genes, as well as with projects to understand how chemicals found in red wine and in green tea extended lifespan. "We are certainly having a marvelous time trying to understand the fundamental mechanisms of life, and the UFS is an exciting place to be if one was interested in studying life at the level of molecules," he said.


Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
18 September 2008
 

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