Trio shares Nobel Prize in medicine
Each made ‘ immeasurable’ contributions to field of medicine
A Chinese scientist who turned to ancient texts to discover a powerful malaria drug shared the Nobel Prize in medicine on Monday with American and Japanese researchers whose discoveries have raised hopes of eliminating other tropical diseases.
Tu Youyou — the first- ever Chinese medicine laureate — will share the 8- million Swedish kronor ( about $ 1.25 million) award with Japanese microbiologist Satoshi Omura and William Campbell, an Irish- born U. S. scientist.
Tu was cited for discovering artemisinin, a drug that's now the primary treatment against malaria, saving millions of lives worldwide. Inspired by Chinese traditional medicine, she made her discovery while working on a malaria project for the Chinese military.
Omura and Campbell discovered another drug, avermectin, whose derivatives have helped fight river blindness and lymphatic filariasis. Those diseases are caused by parasitic worms and affect millions of people in Africa and Asia.
The Nobel committee said the winners, who are all in their 80s and made their breakthroughs in the 1970s and ' 80s, had given humankind powerful tools to combat debilitating diseases.
“The consequences in terms of improved human health and reduced suffering are immeasurable,” the committee said.
Campbell, 85, is a research fellow emeritus at Drew University in Madison, New Jersey. He told the AP he made his main discovery in 1975 while working at pharmaceutical company Merck.
“It was a great team effort by the people at Merck and Company,” said Campbell. He said the award came as a “huge surprise.”
Omura, 80, is a professor emeritus at Kitasato University in Japan. He wondered whether he deserved the prize.
“I have learned so much from microorganisms and I have depended on them, so I would much rather give the prize to microorganisms,” Omura told Japanese broadcaster NHK.
Working in the 1970s, Omura isolated new strains of Streptomyces bacteria and cultured them so that they could be analyzed for their impact against harmful microorganisms, the Nobel committee said.
Omura said the crucial strain was found in a soil sample from a golf course near Tokyo. He said he always carries around a plastic bag in his wallet so he can collect soil samples.
Campbell showed that one of those cultures was remarkably efficient against parasites in animals, the committee said. The bioactive agent was purified and modified to a compound that effectively killed parasitic larvae, leading to the discovery of new class of drugs.
Today they are considered a highly effective treatment against river blindness and lymphatic filariasis, the committee said.
River blindness is an eye and skin disease that ultimately leads to blindness. About 90 per cent of the disease occurs in Africa, according to the World Health Organization.
Lymphatic filariasis can lead to swelling of the limbs and genitals, called elephantiasis, and it's primarily a threat in Africa and Asia. WHO says 120 million people are infected with the disease, with about 40 million disfigured and incapacitated.
Tu, 84, is chief professor at the China Academy of Traditional Chinese Medicine. As a junior researcher, she was recruited by the Chinese government to work on a military project in 1969 to find malaria drugs.
She turned to herbal medicine to discover a new malarial agent in an extract from the sweet wormwood plant. The agent, artemisinin, was highly effective against malaria, a disease that was on the rise in the 1960s, the committee said.
Malaria is a mosquito- borne disease that still kills around 500,000 people a year, mostly in Africa, despite efforts to control it.
The medicine award was the first Nobel Prize to be announced. The winners of the physics, chemistry and peace prizes are set to be announced later this week. The economics prize will be announced next Monday. No date has been set yet for the literature prize, but it is expected to be announced on Thursday.