Cerebrospinal fluid used to deliver therapeutics for Lou Gehrig's disease to brainJuly 28, 2006Researchers from the University of California, San Diego have shown that instead of trying to deliver therapeutic agents for neurodegenerative diseases across the highly impermeable blood-brain barrier via the blood, therapeutic molecules known as antisense oligonucleotides can be delivered to the brain and spinal cord through the cerebrospinal fluid (CSF) at doses shown to slow the progression of amyotrophic lateral sclerosis (ALS), also referred to as Lou Gehrig's disease, in rats. The aggregation of toxic proteins in the central nervous system (CNS) underlies many neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, Huntington's disease, and ALS. Several strategies for removing excess proteins from the brain have been tried, but few have been successful due to the impermeability of the protective blood-brain barrier, which prevents substances in the blood from entering brain tissue. In a study in rats appearing online on July 27 in advance of print publication in the August issue of the Journal of Clinical Investigation, Timothy Miller, Richard Smith, and colleagues delivered effective doses of antisense oligonucleotides throughout all brain regions affected in the major neurodegenerative diseases and to all levels of the spinal cord through the CSF. Once produced, CSF circulates from the brain to all regions of the CNS, yielding complete replacement 3 times a day. Exploiting this process and using second-generation oligonucleotides with enhanced tolerability and potency, the authors were able to modulate and deliver effective doses of antisense oligonucleotides. Antisense oligonucleotides to the enzyme superoxide dismutase reduced protein and mRNA levels in the CNS. Delivery of antisense therapy initiated after the onset of symptoms slowed disease progression in a rat model of ALS. This establishes that direct delivery of antisense oligonucleotides through the CSF can be an effective means of treating neurodegenerative diseases when the appropriate toxic protein is known. Journal of Clinical Investigation |
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| Related Cerebrospinal Fluid Current Events and Cerebrospinal Fluid News Articles Neurologists Investigate Possible New Underlying Cause of MS Neurologists at the University at Buffalo are beginning a research study that could overturn the prevailing wisdom on the cause of multiple sclerosis (MS). Cocaine exposure during pregnancy leads to impulsivity in male, not female, monkeys Adult male monkeys exposed to cocaine while in the womb have poor impulse control and may be more vulnerable to drug abuse than female monkeys, even a decade or more after the exposure, according to a new study by researchers at Wake Forest University School of Medicine. The findings could lead to a better understanding of human drug abuse. Urate in blood and spinal fluid may predict slower decline in patients with Parkinson's disease Higher concentration of urate (an antioxidant) in the blood and spinal fluid of patients with early Parkinson's disease is associated with slower rates of clinical decline. Study supports possible role of urate in slowing Parkinson's disease progression By examining data from a 20-year-old clinical trial, a research team based at the MassGeneral Institute for Neurodegenerative Diseases (MGH-MIND) and Harvard School of Public Health (HSPH), has found evidence supporting the findings of their 2008 study - that elevated levels of the antioxidant urate may slow the progression of Parkinson's disease. Investment in Parkinson's disease data bank yields potential therapy Individuals with Parkinson's disease who have higher levels of a metabolite called urate in their blood and in cerebrospinal fluid (CSF) have a slower rate of disease progression. Rochester-led Parkinson's study pays off again, 2 decades later Parkinson disease progresses more slowly in patients who have higher levels of urate, a chemical that at very high level is associated with gout, scientists have found. Researchers report benefits of new standard treatment study for rare pediatric brain cancer A team of researchers led by The University of Texas M. D. Anderson Cancer Center unveiled results today from the largest-ever collaborative study addressing the treatment of a rare pediatric brain tumor. Are the monoamines involved in shaping conduct disorders? Antisocial and aggressive behaviours represent a widespread and expensive social problem. Recent research has convincingly shown that there is a strong interaction between genetic inheritance and environment for development of personality and behaviour. Researchers find 2 more genetic risk factors for Alzheimer's disease An international team of scientists has identified two more genetic risk factors for Alzheimer's disease. The findings are reported in the online edition of the journal Nature Genetics. How meningitis bacteria attack the brain A specific protein on the surface of a common bacterial pathogen allows the bacteria to leave the bloodstream and enter the brain, initiating the deadly infection known as meningitis. More Cerebrospinal Fluid Current Events and Cerebrospinal Fluid News Articles |
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