Would you like to react to this message? Create an account in a few clicks or log in to continue.
Similar topics

    ‘Immortal’ Cells

     :: General :: Common Room

    Go down

    ‘Immortal’ Cells Empty ‘Immortal’ Cells

    Post by Trick Mon 01 Feb 2010, 2:24 pm


    Henrietta Lacks’ ‘Immortal’ Cells





    Journalist Rebecca Skloot’s new book investigates how a poor black
    tobacco farmer had a groundbreaking impact on modern medicine





    • By Sarah Zielinski
    • Smithsonian.com, January 22, 2010

    Medical researchers use laboratory-grown human cells to learn the
    intricacies of how cells work and test theories about the causes and
    treatment of diseases. The cell lines they need are “immortal”—they can
    grow indefinitely, be frozen for decades, divided into different
    batches and shared among scientists. In 1951, a scientist at Johns
    Hopkins Hospital in Baltimore, Maryland, created the first immortal
    human cell line with a tissue sample taken from a young black woman
    with cervical cancer. Those cells, called HeLa cells, quickly became
    invaluable to medical research—though their donor remained a mystery
    for decades. In her new book, The Immortal Life of Henrietta Lacks,
    journalist Rebecca Skloot tracks down the story of the source of the
    amazing HeLa cells, Henrietta Lacks, and documents the cell line's
    impact on both modern medicine and the Lacks family.



    Who was Henrietta Lacks?
    She was a black tobacco farmer from southern Virginia who got cervical
    cancer when she was 30. A doctor at Johns Hopkins took a piece of her
    tumor without telling her and sent it down the hall to scientists there
    who had been trying to grow tissues in culture for decades without
    success. No one knows why, but her cells never died.

    Why are her cells so important?

    Henrietta’s cells were the first immortal human cells ever grown in
    culture. They were essential to developing the polio vaccine. They went
    up in the first space missions to see what would happen to cells in
    zero gravity. Many scientific landmarks since then have used her cells,
    including cloning, gene mapping and in vitro fertilization.

    There has been a lot of confusion over the years about the source of HeLa cells. Why?

    When the cells were taken, they were given the code name HeLa, for the
    first two letters in Henrietta and Lacks. Today, anonymizing samples is
    a very important part of doing research on cells. But that wasn’t
    something doctors worried about much in the 1950s, so they weren’t
    terribly careful about her identity. When some members of the press got
    close to finding Henrietta’s family, the researcher who’d grown the
    cells made up a pseudonym—Helen Lane—to throw the media off track.
    Other pseudonyms, like Helen Larsen, eventually showed up, too. Her
    real name didn’t really leak out into the world until the 1970s.

    How did you first get interested in this story?

    I first learned about Henrietta in 1988. I was 16 and a student in a
    community college biology class. Everybody learns about these cells in
    basic biology, but what was unique about my situation was that my
    teacher actually knew Henrietta’s real name and that she was black. But
    that’s all he knew. The moment I heard about her, I became obsessed:
    Did she have any kids? What do they think about part of their mother
    being alive all these years after she died? Years later, when I started
    being interested in writing, one of the first stories I imagined myself
    writing was hers. But it wasn’t until I went to grad school that I
    thought about trying to track down her family.

    How did you win the trust of Henrietta’s family?

    Part of it was that I just wouldn’t go away and was determined to tell
    the story. It took almost a year even to convince Henrietta’s daughter,
    Deborah, to talk to me. I knew she was desperate to learn about her
    mother. So when I started doing my own research, I’d tell her
    everything I found. I went down to Clover, Virginia, where Henrietta
    was raised, and tracked down her cousins, then called Deborah and left
    these stories about Henrietta on her voice mail. Because part of what I
    was trying to convey to her was I wasn’t hiding anything, that we could
    learn about her mother together. After a year, finally she said, fine,
    let’s do this thing.

    When did her family find out about Henrietta’s cells?

    Twenty-five years after Henrietta died, a scientist discovered that
    many cell cultures thought to be from other tissue types, including
    breast and prostate cells, were in fact HeLa cells. It turned out that
    HeLa cells could float on dust particles in the air and travel on
    unwashed hands and contaminate other cultures. It became an enormous
    controversy. In the midst of that, one group of scientists tracked down
    Henrietta’s relatives to take some samples with hopes that they could
    use the family’s DNA to make a map of Henrietta’s genes so they could
    tell which cell cultures were HeLa and which weren’t, to begin
    straightening out the contamination problem.
    So a postdoc called Henrietta’s husband one day. But he had a
    third-grade education and didn’t even know what a cell was. The way he
    understood the phone call was: “We’ve got your wife. She’s alive in a
    laboratory. We’ve been doing research on her for the last 25 years. And
    now we have to test your kids to see if they have cancer.” Which wasn’t
    what the researcher said at all. The scientists didn’t know that the
    family didn’t understand. From that point on, though, the family got
    sucked into this world of research they didn’t understand, and the
    cells, in a sense, took over their lives.

    How did they do that?

    This was most true for Henrietta’s daughter. Deborah never knew her
    mother; she was an infant when Henrietta died. She had always wanted to
    know who her mother was but no one ever talked about Henrietta. So when
    Deborah found out that this part of her mother was still alive she
    became desperate to understand what that meant: Did it hurt her mother
    when scientists injected her cells with viruses and toxins? Had
    scientists cloned her mother? And could those cells help scientists
    tell her about her mother, like what her favorite color was and if she
    liked to dance.
    Deborah’s brothers, though, didn’t think much about the cells until
    they found out there was money involved. HeLa cells were the first
    human biological materials ever bought and sold, which helped launch a
    multi-billion-dollar industry. When Deborah’s brothers found out that
    people were selling vials of their mother’s cells, and that the family
    didn’t get any of the resulting money, they got very angry. Henrietta’s
    family has lived in poverty most of their lives, and many of them can’t
    afford health insurance. One of her sons was homeless and living on the
    streets of Baltimore. So the family launched a campaign to get some of
    what they felt they were owed financially. It consumed their lives in
    that way.

    What are the lessons from this book?

    For scientists, one of the lessons is that there are human beings
    behind every biological sample used in the laboratory. So much of
    science today revolves around using human biological tissue of some
    kind. For scientists, cells are often just like tubes or fruit
    flies—they’re just inanimate tools that are always there in the lab.
    The people behind those samples often have their own thoughts and
    feelings about what should happen to their tissues, but they’re usually
    left out of the equation.

    And for the rest of us?

    The story of HeLa cells and what happened with Henrietta has often been
    held up as an example of a racist white scientist doing something
    malicious to a black woman. But that’s not accurate. The real story is
    much more subtle and complicated. What is very true about science is
    that there are human beings behind it and sometimes even with the best
    of intentions things go wrong.
    One of the things I don’t want people to take from the story is the
    idea that tissue culture is bad. So much of medicine today depends on
    tissue culture. HIV tests, many basic drugs, all of our vaccines—we
    would have none of that if it wasn’t for scientists collecting cells
    from people and growing them. And the need for these cells is going to
    get greater, not less. Instead of saying we don’t want that to happen,
    we just need to look at how it can happen in a way that everyone is OK
    with.

    Read more: http://www.smithsonianmag.com/science-nature/Henrietta-Lacks-Immortal-Cells.html#ixzz0eJkzAjSe
    Trick
    Trick
    Member
    Member

    ‘Immortal’ Cells 6
    Number of posts : 125
    Experience : 12592
    Rep : 0

    Character sheet
    Name: Trick
    Primary Weapon:
    Power Level:
    ‘Immortal’ Cells Left_bar_bleue5/99‘Immortal’ Cells Empty_bar_bleue  (5/99)

    Back to top Go down

    Back to top

    - Similar topics

     :: General :: Common Room

     
    Permissions in this forum:
    You cannot reply to topics in this forum