Harnessing The Immune System To Fight Cancer : Shots - Health News Our immune systems constantly fight off disease — protecting us from colds, flu and infection. An experimental treatment called immunotherapy is helping patients' immune systems fight off cancer.
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Harnessing The Immune System To Fight Cancer

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Harnessing The Immune System To Fight Cancer

Harnessing The Immune System To Fight Cancer

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DAVID GREENE, HOST:

Today in Your Health, we are beginning a series that we're calling Living Cancer. On this program and on ALL THINGS CONSIDERED later today, we'll explore the difficult decisions people and their families face when dealing with cancer, even as new therapies are extending lives. This morning, we look at one of the latest developments in the field. NPR health correspondent Rob Stein reports that after trying for decades, doctors say they have finally figured out how to use our own immune systems to fight cancer. It's called immunotherapy.

ROB STEIN, BYLINE: When Barbara Marder was diagnosed with lung cancer three years ago, she had part of her right lung removed, went through a round of chemotherapy and tried to move on with her life.

BARBARA MARDER: I had hoped that everything was fine, that I would not create difficulty for my children; that I would get to see my grandchildren grow up.

STEIN: But a routine scan a year later found bad news. The cancer was back - this time in the other lung.

MARDER: I was very disappointed. And I decided at that point that, you know, I'd been very fortunate. My life has been very blessed in many ways, but that I should think about the fact that perhaps this was going to advance rapidly at this point. Check and make sure, is my will in order? What should I do so that my children aren't left with a mess to clean up in my house? Make some of those kinds of preparations should it be necessary.

STEIN: But Marder, who's 73, didn't give up. She started checking out her options, which eventually brought her here.

TRACY: My name is Tracy.

MARDER: Hi, Tracy.

TRACY: I'm going to be taking care of you today.

STEIN: To the Johns Hopkins Cancer Center in Baltimore.

TRACY: So I'm going to be taking three tubes of blood from you - one is for research and two is for your regular appointment.

STEIN: Her regular appointment is with Dr. Julie Brahmer.

JULIE BRAHMER: Good morning. How are you?

MARDER: I'm good.

BRAHMER: Good.

STEIN: She's a cancer specialist who's testing a new way to treat cancer.

BRAHMER: How have you been feeling over the past couple weeks since I last saw you?

MARDER: Fine.

STEIN: It's called immunotherapy.

BRAHMER: So immunotherapy for cancer means developing treatments to harness your immune system and using your own immune system to fight the cancer.

STEIN: Scientists have been trying to do this for decades. After all, our immune systems can fight off all kinds of stuff - colds, the flu, pneumonia - so why not cancer? But nothing seemed to really work.

BRAHMER: It's been very frustrating.

STEIN: Turns out, cancer takes a page from Harry Potter - it puts on an invisibility cloak.

BRAHMER: Cancer can keep the immune system from recognizing that it's bad and keep it from attacking itself.

STEIN: And now scientists have found a way around this.

BRAHMER: The breakthrough is in therapies called checkpoint inhibitors.

STEIN: Checkpoint inhibitors are drugs that pull off cancer's invisibility cloak. They block the switch that turns it on.

BRAHMER: It prevents that invisibility cloak or that force field or shield - it prevents that from going up and so it can't shield itself from the immune system.

STEIN: And these drugs seem to be working, at least for some patients, melting away some of the toughest tumors, like some of the deadliest skin cancers in melanoma patients.

BRAHMER: They seem to be working quite well for multiple different cancers.

STEIN: Kidney cancer, bladder cancer, head and neck cancer, lymphoma - even perhaps breast and lung cancer. So Barbara Marder volunteered for one of Brahmer's studies.

BRAHMER: All right. Well, let me examine you.

MARDER: OK.

BRAHMER: And then we'll kind of come back and we'll summarize everything.

STEIN: Within weeks of starting her infusions, the tumors in Marder's left lung began to disappear.

MARDER: Oh, that was very, very exciting. It really changed my perspective. I thought, jeepers.

STEIN: Now, checkpoint inhibitors can cause serious side effects when the immune system attacks healthy cells, causing dangerous, even sometimes life-threatening organ damage. But that seems pretty rare. Most patients just get a little tired. Some, like Marder, get an itchy rash, but for the most part it's a lot easier than traditional chemo.

BRAHMER: You can live a great life, do travel and try to live your life as normally as possible. That's definitely different than chemotherapy, but you should ask the expert because she's done chemotherapy before, so...

MARDER: Oh, definitely, definitely. It's far less tiring.

STEIN: One big question is how long will these drugs keep working? Regular chemo often runs out, but so far, checkpoint inhibitors seem to keep going a lot longer. Marder's back today, more than a year after she started, to see if Dr. Brahmer says that's still true for her.

BRAHMER: The CAT scan doesn't show any evidence of her cancer.

STEIN: None.

BRAHMER: None.

STEIN: It's completely gone.

BRAHMER: Completely gone - we can't see anything.

STEIN: That seems pretty amazing.

BRAHMER: It is amazing.

STEIN: So just the dumb question - does that mean she's cured?

BRAHMER: I can't say yet. Technically, we can't say people are cured from their disease until they're free of disease for five years. So - but we're through a year and we'll see how things go as time goes by.

STEIN: Marder is thrilled.

MARDER: I'm very fortunate. I wish that all of your patients had the same. Now it's just back to all the regular old lady things, like my eyes get weaker and my teeth get crummier and my hearing decreases.

STEIN: Another big question about these drugs is how much they cost. They are really, really expensive - more than $120,000 for each round. Critics like Peter Bach say that's just way too much. He's at Memorial Sloan Kettering Cancer Center in New York.

PETER BACH: Cancer immunotherapy is the most exciting thing we have going on in the field. And it's frustrating that companies are gouging the U.S. system with their prices.

STEIN: The companies that make checkpoint inhibitors defend their price tags, and say they will help make sure that any patients who need the drugs can afford them. Michael Giordano is with Bristol-Myers Squibb.

MICHAEL GIORDANO: Any patient who needs access to a checkpoint inhibitor made by Bristol-Myers Squibb will have access through a robust patient assistance program.

STEIN: Marder's in a study, so she doesn't have to pay for the drug, which she gets every two weeks. So she's back today for another infusion of her checkpoint inhibitor to keep her cancer in check. A nurse comes into her room to insert her IV.

JUSTIN: OK - in 60 minutes and you'll be all set.

STEIN: Now Marder has to wait for about an hour while the drug slowly drips into her body, but she has no complaints.

MARDER: There's high hopes that I can see my little grandchild, who's 2-and-a-half, graduate from high school, and the older one, who's 9, graduate from college. That's wonderful.

STEIN: Marder is just one patient. Her doctor, Julie Brahmer, knows she'll have to treat a lot more for a lot longer to really know just how well these checkpoint inhibitors work, and for how long. Many scientists suspect they will take a combination of checkpoint inhibitors to get the most out of our immune systems to fight cancer. Rob Stein, NPR News.

(SOUNDBITE OF MUSIC)

GREENE: And our series Living Cancer continues later today on ALL THINGS CONSIDERED. It is produced with member station WNYC and with WETA, whose documentary "Cancer: The Emperor Of All Maladies" will air on PBS next month.

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