Should you donate your DNA to help cure diseases? - Greg Foot

173,414 views ・ 2021-05-13

TED-Ed


Please double-click on the English subtitles below to play the video.

00:06
So here’s the thing: developing a new drug and getting it to you
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can take a long time.
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When we have to work out the cause of a condition—
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for example, with multiple sclerosis or heart disease—
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developing a new drug takes significant trial and error and lots of money.
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Which is why we only have drugs for a small proportion of diseases.
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But you could change all this.
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You could help discover new, cheaper drugs for currently untreatable diseases.
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It's all about medical crowdsourcing.
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However, researchers aren’t asking you to donate your money,
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they’re asking you to donate something more personal...
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First, though, some drug development history.
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Many of the first medicines were discovered by chance.
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Natural philosophers then took these
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and identified the active chemicals inside.
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And pharmaceutical companies then turned those into drugs.
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The thing is, for a long time, we didn’t know why those drugs worked.
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Until scientists figured out that disease happens when the molecular machines
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that keep your body going— your proteins— start misbehaving.
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Drugs treat disease by targeting those disruptive proteins.
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Researchers realized that if they can identify
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which malfunctioning proteins cause a specific disease,
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they can then try to find or develop a drug
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that stops those proteins acting up, and that will prevent the disease.
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It’s a great plan, but it’s a slow process.
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So far, they’ve only identified these therapeutic targets
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for a small proportion of diseases.
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However, this is where you can help.
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Researchers are now turning their attention to DNA,
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to the genetic instruction manual that tells our bodies how to make our proteins.
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They want to know which small changes in someone’s genome
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can lead to the production of those dodgy proteins that cause a disease.
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The thing is, that’s a big job.
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DNA is huge, and each disease is likely to have hundreds, possibly thousands,
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of proteins involved.
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But if they have lots of people’s genomes, they can compare them and spot patterns.
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They can look at multiple people suffering from
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the same currently untreatable disease,
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find any small genetic changes they share,
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identify the faulty proteins they code for,
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and there you go: those are brand new therapeutic targets
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for a currently untreatable disease.
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Now the researchers have three options:
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1. Has one of those new target proteins been previously linked
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to a different disease that is treatable?
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If so, the drug for that disease may target this protein
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and work for this disease, too.
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To find out, start a clinical trial.
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2. If not, has one of those new target proteins being previously linked
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to a different disease that had a promising drug
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that didn’t ultimately work?
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If so, its promise may have come from successfully targeting this protein
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and it may work for this disease.
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Start a clinical trial to find out.
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3. If this is a brand new protein target never identified before for any disease
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could they design a new drug to affect it?
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This involves AI machine learning and some very cool chemistry.
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And a lot of time, effort, and cost too.
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Researchers are excited about all this because they think
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1 in 5 of the proteins in your body either have, or are likely to have,
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a drug that will bind to them.
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And, as any common disease is likely to have hundreds, possibly thousands,
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of proteins involved,
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they’re hopeful they’ll be able to identify a few of those proteins
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they’ve already got a drug for.
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But this all relies on finding those new therapeutic targets,
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and that's why they need you.
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Well, your data— both your genetic data and your health history data,
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so they can compare the genomes of people with similar conditions.
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So would you give your data for research?
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There are two questions you may have:
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who will have access to my data, and what could they do with it?
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One group is health care providers who are starting to consider
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using genetic analysis to give patients more personal care.
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Another group is private consumer genetic testing companies.
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Some have already sold genetic data on to pharmaceutical companies for profit,
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but that was with their customers consent.
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However, it raises another question:
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if your data goes towards making new drugs,
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should pharmaceutical companies recognize that contribution
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and offer drugs more cheaply?
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Your best bet is to research the organizations who are asking for your data
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to find out what they will do with it and how they will protect it.
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We’ll each have our own take on this,
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but what is clear is genomics could be a powerful tool
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to cut the current time and cost it takes to develop new drugs
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for currently untreatable diseases.
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So, what do you think?
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