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Roxanne Khamsi

👤 Speaker
142 total appearances

Appearances Over Time

Podcast Appearances

Science Friday
Your DNA is constantly mutating, and that’s a good thing

Yeah, you could say our understanding has evolved, right?

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So we used to think about cancer as the result of one or two genetic errors.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And that was kind of the pervasive thinking for decades.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

What recently has been shown is that cancers are just rife with mutations.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

There can be in certain types of cancers, like colorectal cancers, for example, there's some theories that there's like a big bang of mutations that happens early on that just seeds a huge amount of diversity there.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So instead of thinking of a tumor as something that was the result of one or two genetic errors, we now think of tumors and malignancies as hotbeds of mutation.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And the challenge then is to think about which of those mutations are driving the cancer and making it most resistant to treatment.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So, yeah, I want people to understand that we need a revolution in our understanding of mutation.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And part of that is I want to destigmatize the concept of mutation.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

It's not always a bad thing.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So back in the late 1990s, for example, scientists found that there were these two boys in the New York area that were born with a type of immunodeficiency disorder.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

that they were supposed to live in a bubble essentially their whole life.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And what they found, though, is that these two boys were defying any expectations.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

Their immune systems were doing much better than the scientists expected.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And when they looked closely, they found that there actually had been mutations that these boys had acquired that had corrected their inherited disorder.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And it's not the only example.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So there's a disease called Fanconi anemia.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And about 20% of people with that disorder actually start having blood cells that correct the disease that they have.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

And in 5% of those cases, they have enough that they start to progress towards just curing themselves.

Science Friday
Your DNA is constantly mutating, and that’s a good thing

So it is like finding the answer within.