Though we are gradually gaining a better understanding of the disorder and ways to treat it, the question remains: Does narcolepsy ever go away?
Learn about the present theory of why narcolepsy occurs and whether the underlying cause can be reversed.
An Autoimmune Element
Narcolepsy is believed to be due to an autoimmune process. The immune system is responsible for fighting off infections, but sometimes this powerful arsenal is turned against the body itself.
When this occurs, specific syndromes may result, including hepatitis, rheumatoid arthritis, and even narcolepsy. There is growing evidence that an infection may trigger the body to react against itself in some individuals who are susceptible as a result of a genetic predisposition.
In narcolepsy, the body’s immune system begins to target and destroy a small population of neurons within the hypothalamus of the brain. These neurons, or nerve cells, contain a neurotransmitter called hypocretin or orexin.
As the disease evolves, the entire collection of 60,000 to 70,000 nerve cells in the hypothalamus are permanently destroyed. As a result, the level of hypocretin detected in the cerebrospinal fluid (CSF) that bathes the brain drops to zero.
This can be measured via a lumbar puncture. When patients have cataplexy, a type of weakness triggered by emotion, the hypocretin levels are usually zero and this characterizes type 1 narcolepsy.
Furthermore, this destructive autoimmune process may be provoked after infection (typically a cold or flu). More recently, an increased risk of narcolepsy was found following vaccination with Pandemrix, a monovalent H1N1 influenza vaccine produced for the 2009-2010 flu season and only used in Europe. Use has since been halted.
A Chronic Condition
Unfortunately, the destruction of these brain cells is typically complete and the resulting deficit is permanent. The damage that is done cannot presently be reversed. Therefore, narcolepsy is a chronic condition that requires persistent treatment.
There are multiple treatments that may be effective in treating the symptoms associated with narcolepsy. These may include stimulant medications, such as Provigil or Nuvigil, as well as medications that prevent cataplexy, such as Xyrem.
If you suffer from narcolepsy, it is important to speak with a sleep specialist who can tailor the treatment to your specific needs. Though disability often persists, some people are able to make adjustments with the use of medications to preserve many daily functions.
Hope remains in the years to come. New therapeutics may be able to prevent, slow, or reverse the destruction of these hypocretin-containing cells in susceptible individuals. Regeneration of this population of brain cells with stem cell transplants may also eventually be possible.
Though these interventions are still distant on the horizon, there remains the possibility that one day, narcolepsy may ultimately go away in those who are afflicted with it.