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Tampilkan postingan dengan label Scientist. Tampilkan semua postingan
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Kamis, 06 Oktober 2011

Scientist wins Nobel 3 days after cancer death

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Family members of Nobel prize winner Ralph Steinman walk in front of a picture of Steinman during a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. From left to right are daughter Lesley Steinman, wife Claudia Steinman and son Adam Steinman. Canadian-born Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system, but hours later his university said that he had died three days earlier. The Nobel committee had been unaware of his death. (AP Photo/Seth Wenig) Family members of Nobel prize winner Ralph Steinman walk in front of a picture of Steinman during a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. From left to right are daughter Lesley Steinman, wife Claudia Steinman and son Adam Steinman. Canadian-born Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system, but hours later his university said that he had died three days earlier. The Nobel committee had been unaware of his death. (AP Photo/Seth Wenig) FILE - This is a Tuesday, Oct. 5, 2010 file photo of Professor Andre Geim, left, and Dr Konstantin Novoselov are seen outside Manchester University, Manchester, England. The scientists won the 2010 Nobel Prize for Physics. (AP Photo/Jon Super, File) FILE - In this April 24, 2009 photo, Dr. Bruce Beutler of the Scripps Research Institute in La Jolla, Calif., speaks during a news conference in Albany, N.Y., The Nobel committee says American Bruce Beutler and Luxembourg-born scientist Jules Hoffmann have shared the 2011 Nobel Prize in medicine with Canadian-born Ralph Steinman on Monday, Oct. 3, 2011. Beutler and Hoffman were cited "for their discoveries concerning the activation of innate immunity." (AP Photo/Mike Groll) FILE - In this April 24, 2009 file photo, Dr. Ralph Steinman of Rockefeller University speaks during a news conference in Albany, N.Y. Rockefeller University in New York says Ralph Steinman, co-winner of this year's Nobel Prize in medicine, has died. The university says Steinman was diagnosed with pancreatic cancer four years ago and died on Sept. 30, three days before the announcement. (AP Photo/Mike Groll, File) Nobel prize winner Ralph Steinman's family, from left to right, daughter Lesley Steinman, wife Claudia Steinman, son Adam Steinman and daughter Alexis Steinman, speak at a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system but hours later his university said that he had been dead for three days. The Nobel committee had been unaware of Canadian-born Ralph Steinman's death. (AP Photo/Seth Wenig)eval("var currentItemd57851005a80479aaeeb90a12c70b9ff = 1;");eval("var nextd57851005a80479aaeeb90a12c70b9ff = 0;");eval("var previousd57851005a80479aaeeb90a12c70b9ff = 0;"); NEW YORK (AP) — Ralph Steinman, a pioneer in understanding how cells fight disease, tried to help his own immune system thwart his pancreatic cancer.

Steinman survived until Friday. Three days later, he was awarded the Nobel Prize for medicine.

The Nobel committee, unaware of his death, announced the award Monday in Stockholm. Steinman's employer, Rockefeller University in New York, learned of his death after the Nobel announcement.

Steinman's wife, Claudia, said the family had planned to disclose his death Monday — only to discover an email to his cellphone from the Nobel committee.

Friends and colleagues were stunned by his death.

"For the last five years, I've gotten up in the morning of the Nobel Prize announcement and rushed to the computer to see his name," said Olivera J. Finn of the University of Pittsburgh.

"And this morning I saw it, and I just totally shrieked with joy," she said. Then she heard the bad news from a friend in Singapore.

"I have been this whole morning ... out of breath like somebody punched me in the stomach," Finn said.

Experts disagree whether Steinman's research helped him live for 4½ years after he was diagnosed. A colleague in his lab thinks it did. The odds of making it even a year with his type of cancer are less than 5 percent.

Nobel officials said they believed it was the first time that a laureate had died before the announcement without the committee's knowledge.

"It is incredibly sad news," said Nobel Foundation chairman Lars Heikensten. "We can only regret that he didn't have the chance to receive the news he had won the Nobel Prize. Our thoughts are now with his family."

Since 1974, the Nobel statutes don't allow posthumous awards unless a laureate dies after the announcement but before the Dec. 10 award ceremony. That happened in 1996 when economics winner William Vickrey died a few days after the announcement.

However, the committee said Monday that Steinman's award would stand and that his survivors would receive his share of the $1.5 million prize.

The Canadian-born Steinman, 68, was awarded the prize along with American Bruce Beutler and French scientist Jules Hoffmann. They were honored for discoveries about the body's disease-fighting immune system.

Steinman discovered so-called dendritic cells in 1973. These cells regulate the activity of other cells — Steinman called them the conductor of the immune system.

"When he got sick, he realized he needed to call upon these cells to induce a strong enough immune response to fight his tumor, and that is what he did," said Dr. Sarah Schlesinger, clinical director for his lab.

Steinman tried eight to 10 experimental therapies approved by the federal government, focusing in various ways on revving up his immune system to fight his cancer, she said.

Colleagues came forward with their best approaches for other kinds of cancer, and Steinman analyzed what seemed the most promising for him.

In one approach, for example, samples of Steinman's own dendritic cells were loaded with protein markers from his tumor, and then reinjected into his body. The idea was that this would "teach his immune system how to respond to that tumor," said Rockefeller colleague Dr. Michel Nussenzweig.

Although he also underwent chemotherapy, "he didn't really want to take it because he wanted to be cured," Nussenzweig said. "And he felt the immune system would be the best way to effect a cure, as opposed to just living with the disease."

Dozens of scientists around the world pitched in on the effort, Nussenzweig said. "Ralph was a special person, and they were all eager to do anything to try to cure him."

The experimental therapy continued until just recently, he said, but "there's no way of knowing whether it worked or not."

Steinman was the only patient, with no control group — other patients with the same cancer for comparison, a scientific must for convincing evidence. "It's not the kind of experiment Ralph would have liked to have done."

Rockefeller University said "his life was extended" using the therapy of his own design. Schlesinger believes that, pointing to the poor survival odds for his tumor and his good quality of life during his treatment. Noting that he also got chemotherapy, she said, "I think it all worked together."

But Dr. Alan Venook, a pancreatic cancer specialist at the University of California, San Francisco, cautioned against drawing conclusions about the impact of the treatments.

He said surviving four years with pancreatic cancer "is a long time," but not out of the question, depending on the type and how advanced it was when it was found.

"It's a disservice to the field for anyone to say that his immune therapy prolonged his life," Venook added.

"The phones will be ringing off the hook" with desperate patients who mistakenly believe that these experimental treatments have been proved safe or effective when in fact they have not, he said.

Finn said Steinman used several experimental therapies based on the immune system "because he believed in that as a solution to the problem of cancer." She said she believed the approach prolonged his life.

Nussenzweig said Steinman was working on his laboratory research until just a week ago.

He was open and honest about his cancer and "talked about it with a lot of people," Nussenzweig said.

"He was incredibly heroic in how he handled his disease," Finn said. "It was something important to fight. He continued his science, his publications, his experiments. He appeared at all the meetings. He received multiple prizes. He traveled.

"He wasn't delusional in any way, but he was not going to let the disease change his life. Science was his life, and he stayed with it until the end."

Hoffmann, 70, headed a research laboratory in Strasbourg, France, between 1974 and 2009 and served as president of the French National Academy of Sciences in 2007-08.

Beutler, 53, holds dual appointments at the University of Texas Southwestern Medical Center in Dallas and as professor of genetics and immunology at the Scripps Research Institute in San Diego. He will become a full-time faculty member at UT Southwestern on Dec. 1.

Beutler and Hoffmann were cited for their discoveries in the 1990s of receptor proteins that can recognize bacteria and other microorganisms as they enter the body, and activate the first line of defense in the immune system, known as innate immunity.

The work of the three men has enabled the development of improved vaccines against infectious diseases, and in the long term could yield better treatments of cancer, rheumatoid arthritis, Type 1 diabetes, multiple sclerosis, and chronic inflammatory diseases, Nobel committee members said.

The work could also help efforts to make the immune system fight cancer, the committee said. A new treatment, Provenge, uses this concept to attack advanced prostate cancer.

"I am very touched," Hoffmann said. "I'm thinking of all the people who worked with me, who gave everything. I wasn't sure this domain merited a Nobel."

Beutler said he woke up in the middle of the night, glanced at his cellphone and realized he had a new email message.

"And, I squinted at it and I saw that the title line was 'Nobel Prize,' so I thought I should give close attention to that," Beutler said in an interview posted on the Nobel website.

When he opened it, he saw that it was from Nobel committee member Goran Hansson, "and it said that I had won the Nobel Prize, and so I was thrilled."

The medicine award kicked off a week of prize announcements, with the physics prize on Tuesday, chemistry on Wednesday, literature on Thursday and the Nobel Peace Prize on Friday. The winners of the economics award will be announced Oct. 10.

The coveted prizes were established by wealthy Swedish industrialist Alfred Nobel — the inventor of dynamite — except for the economics award, which was created by Sweden's central bank in 1968 in Nobel's memory. The prizes are always handed out on Dec. 10, the anniversary of Nobel's death in 1896.

___

Associated Press writers Karl Ritter, Louise Nordstrom and Malin Rising in Stockholm and chief medical writer Marilynn Marchione in Milwaukee contributed to this report.

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Selasa, 04 Oktober 2011

Scientist wins Nobel for medicine days after death

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Nobel prize winner Ralph Steinman's family, from left to right, daughter Lesley Steinman, wife Claudia Steinman, son Adam Steinman and daughter Alexis Steinman, speak at a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system but hours later his university said that he had been dead for three days. The Nobel committee had been unaware of Canadian-born Ralph Steinman's death. (AP Photo/Seth Wenig) Nobel prize winner Ralph Steinman's family, from left to right, daughter Lesley Steinman, wife Claudia Steinman, son Adam Steinman and daughter Alexis Steinman, speak at a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system but hours later his university said that he had been dead for three days. The Nobel committee had been unaware of Canadian-born Ralph Steinman's death. (AP Photo/Seth Wenig) FILE - In this April 24, 2009 photo, Dr. Ralph Steinman of Rockefeller University speaks during a news conference in Albany, N.Y., Friday, April 24, 2009. The Nobel committee says American Bruce Beutler and Luxembourg-born scientist Jules Hoffmann have shared the 2011 Nobel Prize in medicine with Canadian-born Ralph Steinman on Monday, Oct. 3, 2011. Beutler and Hoffman were cited "for their discoveries concerning the activation of innate immunity." Steinman was honored for "his discovery of the dendritic cell and its role in adaptive immunity." (AP Photo/Mike Groll) FILE - In this April 24, 2009 file photo, Dr. Bruce Beutler of the Scripps Research Institute in La Jolla, Calif., speaks during a news conference in Albany, N.Y. The Nobel committee said Monday, Oct. 3, 2011 that American Bruce Beutler and Luxembourg-born scientist Jules Hoffmann have shared the 2011 Nobel Prize in medicine with Canadian-born Ralph Steinman.(AP Photo/Mike Groll, File) Nobel prize winner Ralph Steinman's family, from left to right, daughter Lesley Steinman, son Adam Steinman, wife Claudia Steinman and daughter Alexis Steinman, speaks to the media after a ceremony honoring him at Rockefeller University in New York, Monday, Oct. 3, 2011. Ralph Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system but hours later his university said that he had been dead for three days. The Nobel committee had been unaware of Canadian-born Ralph Steinman's death. (AP Photo/Seth Wenig) The microscope that Ralph Steinman used in the early 70's to make his discovery about dendritic cells is displayed in his lab in New York, Monday, Oct. 3, 2011. Steinman, a cell biologist, was awarded the Nobel Prize in medicine on Monday for his discoveries about the immune system, but hours later his university said that he had been dead for three days. The Nobel committee had been unaware of Canadian-born Ralph Steinman's death. (AP Photo/Seth Wenig)eval("var currentItemd57851005a80479aaeeb90a12c70b9ff = 1;");eval("var nextd57851005a80479aaeeb90a12c70b9ff = 0;");eval("var previousd57851005a80479aaeeb90a12c70b9ff = 0;"); STOCKHOLM (AP) — A pioneering researcher was awarded the Nobel Prize in medicine Monday, three days after dying of pancreatic cancer without ever knowing he was about to be honored for his immune system work that he had used to try to prolong his own life.

The Nobel committee said it was unaware that Canadian-born cell biologist Ralph Steinman had already died when it awarded the prize to him, American Bruce Beutler and French scientist Jules Hoffmann.

Since the committee is only supposed to consider living scientists, the Nobel Foundation held an emergency meeting Monday and said the decision on the 10 million kronor ($1.5 million) prize will remain unchanged.

"The Nobel Prize to Ralph Steinman was made in good faith, based on the assumption that the Nobel laureate was alive," the foundation said.

Steinman, 68, died Sept. 30, according to Rockefeller University in New York. He underwent therapy based on his discovery of the immune system's dendritic cells, for which he won the prize, the university said.

"He was diagnosed with pancreatic cancer four years ago, and his life was extended using a dendritic-cell based immunotherapy of his own design," the university said.

Beutler and Hoffmann were cited for their discoveries in the 1990s of receptor proteins that can recognize bacteria and other microorganisms as they enter the body, and activate the first line of defense in the immune system, known as innate immunity.

Nobel committee members said the work by the three is being used to develop better vaccines, and in the long run could also help treatment of diseases linked to abnormalities in the immune system, such as rheumatoid arthritis, Type 1 diabetes, multiple sclerosis and chronic inflammatory diseases.

The work could also help efforts to make the immune system fight cancerous tumors, the committee said.

No vaccines are on the market yet, but Nobel committee member Goran Hansson told The Associated Press that vaccines against hepatitis are in the pipeline.

"I am very touched. I'm thinking of all the people who worked with me, who gave everything," Hoffmann said by telephone to a news conference in Paris. "I wasn't sure this domain merited a Nobel."

Beutler said he woke up in the middle of the night, glanced at his cellphone and realized he had a new email message.

"And, I squinted at it and I saw that the title line was 'Nobel Prize,' so I thought I should give close attention to that," Beutler said in an interview posted on the Nobel website. "And, I opened it and it was from Goran Hansson, and it said that I had won the Nobel Prize, and so I was thrilled."

Still, he was a "little disbelieving" until he checked his laptop, "and in a few minutes I saw my name there and so I knew it was real."

Since 1974, the Nobel statutes don't allow posthumous awards unless a laureate dies after the announcement but before the Dec. 10 award ceremony. That happened in 1996 when economics winner William Vickrey died a few days after the announcement.

Before the statutes were changed in 1974 two Nobel Prizes were given posthumously. In 1961, U.N. Secretary-General Dag Hammarskjold was awarded the Nobel Peace Prize less than a month after he died in a plane crash during a peace mission to Congo. Swedish poet Erik Axel Karlfeldt won the Nobel in literature in 1931, although he had died in March of that year.

"The Nobel Foundation thus believes that what has occurred is more reminiscent of the example in the statutes concerning a person who has been named as a Nobel Laureate and has died before the actual Nobel Prize Award Ceremony," the foundation said following its meeting.

Nobel officials said the situation was unprecedented, and that Steinman's survivors would receive his share of the prize money. It wasn't immediately clear who would represent him at the ceremony in Stockholm.

Nobel Foundation chairman Lars Heikensten, who started his job in June, said he was stunned when he found out that Steinman was dead.

"My first thought was: 'Wow, this is a remarkable thing to happen now that I'm involved in this for the first time. How do we handle this now?'" he told AP.

Hansson said the medicine committee didn't know Steinman was dead when it chose him.

"It is incredibly sad news," he said. "We can only regret that he didn't have the chance to receive the news he had won the Nobel Prize. Our thoughts are now with his family."

Beutler, 53, holds dual appointments at University of Texas Southwestern Medical Center in Dallas and as professor of genetics and immunology at the Scripps Research Institute in San Diego. He will become a full-time faculty member at UT Southwestern on Dec. 1.

Hoffmann, 70, headed a research laboratory in Strasbourg, France, between 1974 and 2009 and served as president of the French National Academy of Sciences between 2007-08.

Steinman had been head of Rockefeller University's Center for Immunology and Immune Diseases.

"We are all so touched that our father's many years of hard work are being recognized with a Nobel Prize," Steinman's daughter, Alexis Steinman, said in the Rockefeller University statement. "He devoted his life to his work and his family, and he would be truly honored."

Hoffmann's discovery came in 1996 during research on how fruit flies fight infections. Two years later, Beutler's research on mice showed that fruit flies and mammals activate innate immunity in similar ways when attacked by germs.

Steinman's discovery dates back to 1973, when he found a new cell type, the dendritic cell, which has a unique capacity to activate T-cells. Those cells have a key role in adaptive immunity, when antibodies and killer cells fight infections. They also develop a memory that helps the immune system mobilize its defenses next time it comes under a similar attack.

The medicine award kicked off a week of Nobel Prize announcements, and will be followed by the physics prize on Tuesday, chemistry on Wednesday, literature on Thursday and the Nobel Peace Prize on Friday. The winners of the economics award will be announced on Oct. 10.

The coveted prizes were established by wealthy Swedish industrialist Alfred Nobel — the inventor of dynamite — except for the economics award, which was created by Sweden's central bank in 1968 in Nobel's memory. The prizes are always handed out on Dec. 10, on the anniversary of Nobel's death in 1896.

Last year's medicine award went to British professor Robert Edwards for fertility research that led to the first test tube baby.

___

Associated Press writer Malin Rising contributed to this report.

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