It's normal for us to not be able to sleep at night sometimes. Maybe it happens after a hard day or when we have some kind of problem in our mind. But, can you imagine a fatal disease that can never make you sleep properly, and that too is hereditary? It's really hard to imagine, isn't it? Today we are going to talk about such a rare but very dangerous disease. This is called Fatal Familial Insomnia (FFI) . The name sounds a little scary, doesn't it? But let's get to know it exactly.
What is this FFI? Simply put...
Simply put, FFI (Fatal Familial Insomnia) is a very rare genetic disease. It directly affects your brain and central nervous system. This disease causes you to not sleep properly, which means you have severe insomnia . In addition, you gradually lose your memory, which means you have dementia . You may also experience involuntary muscle twitches, which is called myoclonus .
FFI is a progressive, or degenerative, condition. This means that symptoms get worse over time. Sadly, the symptoms are life-threatening, and there is currently no cure. However, scientists are continuing to research treatments that can slow the progression of the disease and extend the lifespan of those affected.
Who is more likely to develop FFI?
FFI is mainly caused by genetics. This means that it is caused by people who inherit the gene for this disease from one of their parents. Usually, if someone in the family has had this disease before, that family has a chance of developing it. Because, even having one copy of the mutated gene is enough to cause these symptoms. This is called an autosomal dominant pattern in medicine.
However, very, very rarely, someone with no family history of the disease can develop FFI. This happens when a new gene mutation (de novo mutation) occurs. This means that the gene defect is newly formed in that person's body.
How rare is this disease called FFI?
FFI is actually a very rare disease. It is estimated that only one or two people in a million have this disease. Because FFI is genetic, only about 50 to 70 families worldwide have been identified with the gene mutation that causes this disease. So you can imagine how rare it is.
How does FFI disease affect our body?
FFI directly targets our brain and central nervous system. Certain proteins, caused by a genetic mutation, accumulate in the thalamus, a part of our brain that controls bodily functions like sleep. Imagine that instead of folding your clothes neatly and putting them in your closet, you crumple them up, roll them up, and squeeze them. After a while, the closet becomes so full of clothes that you can't close it, right? That's how these misfolded proteins accumulate in the thalamus of the brain. These accumulated proteins damage and poison the cells of the nervous system.
The most severe symptom of this is insomnia , which can have a significant impact on your mental abilities and physical functioning. The symptoms can be life-threatening and worsen over time.
What are the symptoms of FFI?
There are several symptoms of FFI, which begin to appear gradually.
- Progressive insomnia: At first, it may seem like you just have trouble falling asleep, but later you may become unable to sleep at all.
- Hyperactivity of the nervous system: This includes things like high blood pressure, a faster-than-normal heartbeat, and excessive anxiety.
- Memory loss: You gradually start forgetting things.
- Hallucinations: Seeing or feeling things that are not really there.
- Involuntary muscle twitching or jerking (myoclonus): Involuntary jerking or shaking of an arm or leg.
Symptoms of FFI usually begin between the ages of 20 and 70. The most common age of onset is around 40 years.
Importantly, the early symptoms of FFI can sometimes mimic those of dementia or Alzheimer's disease . Therefore, if you have these symptoms, it is important to see a doctor for a proper diagnosis. As the name suggests, these symptoms can be life-threatening.
What causes FFI?
The main cause of FFI is a mutation, or change, in the PRNP gene . This PRNP gene is responsible for making the prion protein PrPC . This PrPC protein is found in our brain, especially in the thalamus, a part of the brain that controls bodily functions like sleep.
When there is a mutation in the PRNP gene, the amino acids that make the PrPC protein do not receive the correct instructions to make this protein correctly. It is like folding a shirt incorrectly. If you do not know how to fold a T-shirt correctly, you crumple it and put it in a drawer. Over time, the pile of T-shirts that you have folded incorrectly makes it impossible to close the drawer. In the same way, this incorrectly folded PrPC protein accumulates in the brain and poisons the cells of the nervous system, which is what causes the symptoms.
Can FFI be inherited?
Yes, FFI can be inherited. This genetic mutation is passed on in an autosomal dominant pattern . This means that even if you inherit the affected gene from only one of your parents, you can still inherit the disease.
However, as mentioned earlier, FFI is very rarely autosomal recessive, meaning that no one in the family has had the disease before, and it can also occur as a new genetic mutation. If that happens, that new mutation can be passed on from you to your future children.
If you are expecting a child and want to know about your risk of passing on a genetic disease to your child, it is a good idea to talk to your doctor and find out about genetic testing .
What causes people with FFI to die?
The main cause of death in people with FFI is damage to the brain and nervous system. This damage, caused by the accumulation of prion proteins in the thalamus, causes severe symptoms such as insomnia and mental decline.
Why is sleep so important to us?
Sleep plays a very important role in keeping us healthy. Getting a good night's sleep improves your mental and physical health. When you sleep, your brain works together with your body, which is what allows you to wake up refreshed and energized in the morning. If you don't get enough sleep, your brain loses its ability to recharge. It affects the way you think and the way your body works. When your brain isn't working 100%, it affects the way your body feels and acts as a result.
People with FFI are unable to sleep, which severely disrupts their brain function. This can lead to adverse side effects that can be life-threatening and challenge their overall well-being.
How is FFI diagnosed?
Your doctor will diagnose FFI by reviewing your symptoms and performing several tests to confirm the diagnosis. These tests may include:
- Polysomnography: This is a sleep-related test.
- Electroencephalogram (EEG): This measures brain wave patterns.
- Cerebrospinal Fluid (CSF) analysis: This test examines the fluid in the brain and spinal cord to diagnose conditions affecting the brain and spinal cord.
- Genetic testing to identify the gene responsible for symptoms.
- Imaging tests: This may include an MRI (Magnetic Resonance Imaging) , CT scan (Computed Tomography scan) , or PET scan (Positron Emission Tomography scan) .
- Laboratory tests such as Complete Blood Count (CBC) , liver function tests , and blood cultures .
How is FFI treated?
The main focus of treatment for FFI is to relieve symptoms and keep you as comfortable as possible. Some treatment options, especially medications, can help temporarily relieve symptoms. However, there is currently no cure for FFI.
Treatment options may include:
- Giving drugs to induce deep sleep (e.g. (gamma-hydroxybutyrate) , (phenothiazines) ).
- Treat muscle spasms by giving medications such as clonazepam .
- Providing vitamins ( B6, B12, iron, folic acid ).
- If there are medications that are making symptoms worse, change their dosage or stop them.
- Psychosocial therapy: Providing psychological support to the patient and family.
- Hospice care / Palliative care: Making the patient's last days comfortable.
Research continues to find new treatment options for people with FFI. One study found that the antibiotic doxycycline has shown some success in prolonging the lives of FFI patients.
What medications are not effective in treating FFI?
Some medications that help you sleep, such as melatonin supplements, only work temporarily to treat FFI. Research has found that sedatives , such as barbiturates and benzodiazepines , are not an effective treatment.
What can someone with FFI expect?
There is no cure for FFI. Once diagnosed, treatment is aimed at keeping you comfortable and managing your symptoms. This means palliative care is the mainstay. The life expectancy for someone with FFI is very short - especially after symptoms start, the average survival time can be anywhere from a few months to about two years. The disease is progressive.
At times like this, it is very important for families to come together, think not only about the care the patient needs, but also about their own mental health, prepare for the sudden loss of a loved one, and seek therapeutic support if necessary.
Can FFI be prevented?
FFI cannot be prevented. Because it is caused by a genetic mutation, it can sometimes occur spontaneously, without any family members having had the disease before.
When should you see a doctor?
If you have trouble sleeping, especially if you feel sleepy during the day, and it doesn't get better, you should see a doctor. Since the symptoms of FFI are similar to those of dementia and Alzheimer's disease , if you have memory loss, difficulty controlling body movements, and difficulty sleeping, you should definitely see a doctor.
What questions should I ask my doctor?
- Would you recommend hospice care at this point in this diagnosis?
- How severe are the symptoms?
- Are there any treatment options that can help relieve symptoms?
Finally, what to remember (Take-Home Message)
Receiving a diagnosis of FFI can be a devastating experience, especially when symptoms gradually worsen over the course of several months. However, you are not alone in this time. Seek support from your doctors, family, friends, and mental health professionals. Palliative care and current treatment options can help temporarily relieve your symptoms. Research is ongoing to find more effective treatments that can extend the lives of people with this disease. So, don't give up hope.
` Fatal Familial Insomnia, FFI, insomnia, genetic diseases, brain diseases, nervous system, prion diseases
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