An estimated seven to ten million people worldwide are living with Parkinson’s disease (PD), which is an incurable and progressive disease of the nervous system affecting movement and cognitive function. More than half of PD patients develop progressive disease showing signs of dementia similar to Alzheimer’s disease. A research team at University of Copenhagen, Denmark, has discovered that non-inheritable PD may be caused by functional changes in the immune regulating gene Interferon-beta (IFN?). Treatment with IFN?-gene therapy successfully prevented neuronal death and disease effects in an experimental model of PD. The results have just been published in prestigious scientific journal Cell.
Protein regulates waste management in nerve cells
The human brain consists of approximately 100 billion neurons, which coordinate activities in all parts of the body. At Biotech Research and Innovation Centre (BRIC), University of Copenhagen, the group of Professor Shohreh Issazadeh-Navikas has discovered that the immune gene IFN? plays a vital role in keeping neurons healthy.
-We found that IFN? is essential for neurons ability to recycle waste proteins. Without this, the waste proteins accumulate in disease-associated structures called Lewy bodies and with time the neurons die, explains assistant professor Patrick Ejlerskov, the first author of this report.
The research team found that mice missing IFN? developed Lewy bodies in parts of the brain, which control body movement and restoration of memory, and as a result they developed disease and clinical signs similar to patients with PD and dementia with Lewy bodies (DLB).
New understanding of non-familial Parkinson’s disease
While hereditary gene mutations have long been known to play a role in familial PD, the study from BRIC offers one of the first models for so-called non-familial PD, which comprises the majority (90-95%) of patients suffering from PD. According to professor Shohreh Issazadeh-Navikas the new knowledge opens new therapeutic possibilities:
–This is one of the first genes found to cause pathology and clinical features of non-familial PD and DLB, through accumulation of disease-causing proteins. It is independent of gene mutations known from familial PD and when we introduced IFN?-gene therapy, we could prevent neuronal death and disease development. Our hope is that this knowledge will enable development of more effective treatment of PD, says professor Shohreh Issazadeh-Navikas.
The Latest on: Parkinson’s
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