Genetic Profiling for Multiple Sclerosis Risk
Unlocking the MS-Epstein-Barr Virus Link: New Study Explores Genetic Triggers
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A groundbreaking study is set to investigate the complex relationship between Multiple Sclerosis (MS) and the Epstein-Barr virus (EBV), a common virus increasingly implicated as a potential trigger for the debilitating autoimmune disease.
Multiple Sclerosis is a chronic autoimmune disease that impairs interaction between the brain, spinal cord, and the rest of the body. Affecting over 33,000 Australians,the precise cause of MS remains elusive,although a combination of genetic predisposition and environmental factors is widely believed to play a importent role.
The research, led by Dr. David Stacey from the University of South Australia (UniSA), aims to unravel why EBV might lead to MS in some individuals while leaving others unaffected.
“For many years, we’ve known that the Epstein-Barr virus is a likely precursor for MS,” stated Dr. Stacey. “Though,given that the virus infects up to 90% of the population,it’s challenging to pinpoint why some individuals develop MS while the vast majority do not. We hypothesize that an individual’s immune system’s response to EBV is a key factor, and genetics can help us illuminate this connection.”
Decoding Genetic Risk and Biological Differences
The study will involve calculating MS genetic risk scores for over 1,000 South Australian participants who have not yet been diagnosed with MS. These participants will then be compared based on their biological traits, with a particular focus on a subset exhibiting either high or low genetic risk for the disease.
“by categorizing individuals based on their genetic profiles, we anticipate identifying biological differences in those with a high genetic predisposition for MS, even in the absence of the disease,” explained Dr. Stacey. “This could reveal the intricate connection between the Epstein-Barr virus and MS, and potentially identify early warning signs or biomarkers for the condition.”
Innovative ‘Recall by Genotype’ Approach
To facilitate this research, the team will employ an innovative study design known as ‘recall by genotype’ (RbG).RbG studies leverage naturally occurring genetic variations strongly associated with a particular disease to stratify participants for research. Individuals are then ‘recalled’ for further testing based on their DNA,enabling researchers to study differences in a more targeted and reliable manner.
the researchers have been instrumental in establishing the necessary resources for RbG studies in Australia, a capability that was previously unavailable. This study will therefore serve as a crucial step in developing standard operating procedures for participant recall and addressing significant ethical considerations surrounding the disclosure of genetic risk facts to research participants.
“If we identify individuals at risk of developing MS, we must carefully consider how – and indeed whether – to share this information, especially when it may not yet be clinically actionable,” Dr. Stacey emphasized. “This study will delve into these ethical, legal, and social questions to provide guidance for how future studies approach personal genetic risk.”
The collaborative research team, which includes partners from the Perron Institute and the University of Adelaide, ultimately hopes that this study will pave the way for larger-scale investigations and contribute to the development of early diagnostic tools and future preventative strategies for Multiple Sclerosis.Source: University of South Australia