阿尔茨海默症不是衰老必然，我们正在攻克治愈之路

精选100篇经典TED演讲，时长8-15分钟，内容涵盖创新、成长与未来趋势。提供MP3在线播放、下载及英文文本，助你提升听力与口语。用思想的力量，点燃学习热情！下面是本期【TED】100篇经典演讲口语听力素材合集的内容，坚持积累，让你的英语更贴近生活！

In the year 1901, a woman called Augusta was taken to a medical asylum in Frankfurt. Augusta was delusional and couldn't remember even the most basic details of her life. Her doctor was called Aluis. Aluis didn't know how to help Augusta, but he watched over her until sadly she passed away in 1906. After she died, Aluis performed an autopsy and found strange plaques and tangles in Augusta's brain, the likes of which he'd never seen before. Now here's the even more striking thing. If Augusta had instead been alive today, we could offer her no more help than Aluis was able to 114 years ago. Aluis was doctor Aluis Alzheimer and Augusta Dieta was the first patient to be diagnosed with what we now call Alzheimer's disease.

Since 1901, medicine has advanced greatly. We've discovered antibiotics and vaccines to protect us from infections, many treatments for cancer, antiretrovirals for HIV, statins for heart disease and much more. But we've made essentially no progress at all in treating Alzheimer's disease. I'm part of a team of scientists who's been working to find a cure for Alzheimer's for over a decade, so I think about this all the time. Alzheimer's now affects 40 million people worldwide, but by 2050 it will affect 150 million people, which by the way will include many of you. If you're hoping to live to be 85 or older, your chance of getting Alzheimer's will be almost one in two. In other words, odds are you'll spend your golden years either suffering from Alzheimer's or helping to look after a friend or loved one with Alzheimer's.

Already in the United States alone, Alzheimer's care costs 200 billion dollars every year. One out of every five Medicare dollars gets spent on Alzheimer's. It is today the most expensive disease and costs are projected to increase fivefold by 2050 as the baby boomer generation ages. It may surprise you that put simply Alzheimer's is one of the biggest medical and social challenges of our generation. But we've done relatively little to address it. Today of the top 10 causes of death worldwide, Alzheimer's is the only one we cannot prevent, cure, or even slow down. We understand less about the science of Alzheimer's than other diseases, because we've invested less time and money into researching it. The US government spends 10 times more every year on cancer research than on Alzheimer's, despite the fact that Alzheimer's costs us more and causes a similar number of deaths each year as cancer.

But the lack of resources stems from a more fundamental cause, a lack of awareness. Because here's what few people know, but everyone should. Alzheimer's is a disease and we can cure it. For most of the past 114 years, everyone, including scientists, mistakenly confused Alzheimer's with aging, we thought that becoming senile was a normal and inevitable part of getting old. But we only have to look at a picture of a healthy aged brain compared to the brain of an Alzheimer's patient to see the real physical damage caused by this disease. As well as triggering severe loss of memory and mental abilities, the damage to the brain caused by Alzheimer's significantly reduces life expectancy and is always fatal.

Remember Dr. Alzheimer found strange plaques and tangles in Augusta's brain a century ago. For almost a century, we didn't know much about these. Today we know they're made from protein molecules. You can imagine a protein molecule as a piece of paper that normally folds into an elaborate piece of origami. There are spots on the paper that are sticky and when it folds correctly, these sticky bits end up on the inside. But sometimes things go wrong and some sticky bits are on the outside. This causes the protein molecules to stick to each other, forming clumps that eventually become large plaques and tangles. That's what we see in the brains of Alzheimer's patients.

We've spent the past 10 years at the University of Cambridge trying to understand how this malfunction works. There are many steps and identifying which step to try to block is complex, like diffusing a bomb. Cutting one wire might do nothing, cutting others might make the bomb explode. We have to find the right step to block and then create a drug that does it. Until recently, we've for the most part been cutting wires and hoping for the best. But now we've gathered together a diverse group of people, medics, biologists, geneticists, chemists, physicists, engineers and mathematicians. Together, we've managed to identify a critical step in the process and are now testing a new class of drugs which should specifically block this step and stop the disease.

Let me show you some of our latest results. No one else in our lab has seen these yet. Let's look at some videos of what happened when we tested these new drugs in worms. So these are healthy worms and you can see they're moving around normally. These worms, on the other hand, have protein molecules sticking together inside them, like humans with Alzheimer's and you can see they're clearly sick. But if we give our new drugs to these worms at an early stage, then we see that they're healthy and they live a normal lifespan. This is just an initial positive result. But research like this shows us that Alzheimer's is a disease that we can understand and we can cure after 114 years of waiting. There's finally real hope for what can be achieved in the next 10 or 20 years.

But to grow that hope, to finally beat Alzheimer's, we need help. This isn't about scientists like me, it's about you. We need you to raise awareness that Alzheimer's is a disease. And if we try, we can beat it. In the case of other diseases, patients and their families have led the charge for more research and put pressure on governments, the pharmaceutical industry, scientists and regulators. That was essential for advancing treatment for HIV in the late 1980s. Today, we see that same drive to beat cancer. But Alzheimer's patients are often unable to speak up for themselves. And their families, who are the hidden victims, caring for their loved ones night and day, are often too worn out to go out and advocate for change. So it really is down to you. Alzheimer's isn't for the most part a genetic disease. Everyone with a brain is at risk. Today, there are 40 million patients like Augusta who can't create the change they need for themselves. Help speak up for them and help demand a cure. Thank you.