Dementia has been described as a “global disaster waiting to happen” and the biggest health and care problem of a generation.Someone is diagnosed with the disease every four seconds and cases are expected to soar from 44 million now to 135 million by 2050.
The disease already costs the world £370 billion each year. This week ministers from the G8 major economies are meeting in London to discuss how to tackle this devastating disease.
What is dementia?
- It’s an umbrella term that describes around 100 diseases in which brain cells die on a huge scale.
- All damage memory, language, mental agility, understanding and judgement.
- Alzheimer’s disease is the most common form, affecting 62% of those living with dementia.
- It gets worse with time and eventually people are left completely dependent on carers.
- It is incurable.
So what are the key actions required?
1) Diagnose dementia early
Early diagnosis will be key to tackling dementia. On the day your doctor tells you that you have dementia you might think that’s the early stages of the disease, but it’s not
It takes 10 to 15 years of brain cells dying before memory problems become noticeable and memory tests lead to a diagnosis.
By this stage a fifth of the core memory centres of the brain will be dead.
It’s why doctors think drug trials have failed, they’re simply trying to treat the disease way too late.
However, developments are being made. It is now possible to see one of the damaged proteins closely tied to Alzheimer’s disease in brain scans, but the challenge is to use these tools to predict the development of dementia.
Other methods, such as finding chemicals in the blood which might predict the onset of dementia, are being investigated as well.
Dementia is also not one disease, but many. Alzheimer’s disease, vascular dementia and dementia with Lewy bodies all have similar symptoms, but may need different treatments. Scientists will need to come up with techniques which can readily distinguish between different forms of dementia.
2) Stop brain cells dying
Currently, there is no drug which can halt or even slow the progression of any form of dementia.
A lot of hope was placed on two potential Alzheimer’s drugs – solanezumab and bapineuzumab – but they failed in trials which showed no benefits for cognition.
However, there were hints that solanezumab may work in people with the earliest stages of the disease. A new trial has started looking at patients with mild dementia.
A cure is obviously the dream, but just slowing the pace of the disease would deliver massive rewards. Delaying dementia by five years could halve the number of people living with the disease.
3) Develop drugs to treat the symptoms
There are dementia drugs, which help people to live with the condition, but there are not enough.
Medication can boost the chemical signalling between surviving brain cells. But the last new medicine, memantine, was approved by the US in 2003. Since then there’s been nothing.
4) Find ways to reduce the risk
Want to massively cut the risk of lung cancer? Don’t smoke. Want to avoid a heart attack? Then exercise and have a healthy diet. Don’t want dementia? Then the answer is less certain.
Age is the biggest risk factor. In the UK, one in three people over the age of 95 has dementia, but there’s not much that you can do about that.
Many of the familiar messages – exercise and eat healthily – have been linked to preventing or delaying the onset of dementia. But the full picture of how family history, lifestyle choices and the environment combine to result in dementia is still unclear.
Prof Peter Passmore, from the British Geriatrics Society and Queen’s University Belfast, says the best advice so far is: “To do what’s healthy for the heart to reduce blood vessel damage to the brain.
So avoid obesity, don’t smoke, regular exercise, control blood pressure, sugar and cholesterol.
5) Work out the best care
Dementia has huge costs for society, but medical bills account for only a small fraction of the overall bill. The real cost is in time in care homes and the lost income of families quitting work to care for relatives.
Research will also need to focus on the best ways to care for patients with dementia and to keep them independent for as long as possible.
Studies have already shown that antipsychotic prescriptions can be halved with the correct training for staff.