Monthly Archives: October 2012

08-10-2012 11:59 The Japanese scientist who managed to transform mature cells into stem cells, without destroying embryos, has been awarded a Nobel Prize in Medicine. Shinya Yamanaka was awarded along with John B. Gurdon from Britain.

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Yamanaka awarded Nobel Prize in Medicine for work with stem cells - Video

NEW YORK (AP) Two scientists from different generations won the Nobel Prize in medicine Monday for the groundbreaking discovery that cells in the body can be reprogrammed into completely different kinds, work that reflects the mechanism behind cloning and offers an alternative to using embryonic stem cells.

The work of British researcher John Gurdon and Japanese scientist Shinya Yamanaka who was born the year Gurdon made his discovery holds hope for treating diseases like Parkinsons and diabetes by growing customized tissue for transplant.

And it has spurred a new generation of laboratory studies into other illnesses, including schizophrenia, which may lead to new treatments.

Basically, Gurdon, 79, and Yamanaka, 50, showed how to make the equivalent of embryonic stem cells without the ethical questions those very versatile cells pose, a promise scientists are now scrambling to fulfill.

Once created, these blank slate cells can be nudged toward developing into other cell types. Skin cells can ultimately be transformed into brain cells, for example.

Just last week, scientists reported turning skin cells from mice into eggs that produced baby mice, a possible step toward new fertility treatments.

Gurdon and Yamanaka performed courageous experiments that challenged scientific opinion, said Doug Melton, co-director of the Harvard Stem Cell Institute.

Their work shows ... that while cells might be specialized to do one thing, they have the potential to do something else, Melton said. It really lays the groundwork for all the excitement about stem cell biology.

Another Harvard stem cell researcher, Dr. George Daley said, I dont think anybody is surprised by the award announcement. The fact that these two share it together is inspired.

In announcing the $1.2 million award, the Nobel committee at Stockholms Karolinska Institute said the work has revolutionized our understanding of how cells and organisms develop.

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2 scientists win nobel for research

NEW YORK (AP) Two scientists from different generations won the Nobel Prize in medicine Monday for the groundbreaking discovery that cells in the body can be reprogrammed into completely different kinds, work that reflects the mechanism behind cloning and offers an alternative to using embryonic stem cells.

The work of British researcher John Gurdon and Japanese scientist Shinya Yamanaka who was born the year Gurdon made his discovery holds hope for treating diseases like Parkinson's and diabetes by growing customized tissue for transplant.

And it has spurred a new generation of laboratory studies into other illnesses, including schizophrenia, which may lead to new treatments.

Basically, Gurdon, 79, and Yamanaka, 50, showed how to make the equivalent of embryonic stem cells without the ethical questions those very versatile cells pose, a promise scientists are now scrambling to fulfill.

Once created, these "blank slate" cells can be nudged toward developing into other cell types. Skin cells can ultimately be transformed into brain cells, for example.

Just last week, scientists reported turning skin cells from mice into eggs that produced baby mice, a possible step toward new fertility treatments.

Gurdon and Yamanaka performed "courageous experiments" that challenged scientific opinion, said Doug Melton, co-director of the Harvard Stem Cell Institute.

"Their work shows ... that while cells might be specialized to do one thing, they have the potential to do something else," Melton said. It "really lays the groundwork for all the excitement about stem cell biology."

Another Harvard stem cell researcher, Dr. George Daley said, "I don't think anybody is surprised" by the award announcement. "The fact that these two share it together is inspired."

In announcing the $1.2 million award, the Nobel committee at Stockholm's Karolinska Institute said the work has "revolutionized our understanding of how cells and organisms develop."

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Nobel awarded for stem cell, early cloning work

STOCKHOLM - Scientists from Britain and Japan shared a Nobel Prize on Monday for the discovery that adult cells can be transformed back into embryo-like stem cells that may one day regrow tissue in damaged brains, hearts or other organs.

John Gurdon, 79, of the Gurdon Institute in Cambridge, Britain and Shinya Yamanaka, 50, of Kyoto University in Japan, discovered ways to create tissue that would act like embryonic cells, without the need to collect the cells from embryos.

They share the $1.2 million Nobel Prize for Medicine, for work Gurdon began 50 years ago and Yamanaka capped with a 2006 experiment that transformed the field of regenerative medicine - the search for ways to cure disease by growing healthy tissue.

These groundbreaking discoveries have completely changed our view of the development and specialization of cells, the Nobel Assembly at Stockholms Karolinska Institute said.

All of the body starts as stem cells, before developing into tissue like skin, blood, nerves, muscle and bone. The big hope is that stem cells can grow to replace damaged tissue in cases from spinal cord injuries to Parkinsons disease.

Scientists once thought it was impossible to turn adult tissue back into stem cells. That meant new stem cells could only be created by taking them from embryos, which raised ethical objections that led to research bans in some countries.

As far back as 1962 Gurdon became the first scientist to clone an animal, making a healthy tadpole from the egg of a frog with DNA from another tadpoles intestinal cell. That showed that developed cells carry the information to make every cell in the body - decades before other scientists made world headlines by cloning the first mammal from adult DNA, Dolly the sheep.

More than 40 years later, Yamanaka produced mouse stem cells from adult mouse skin cells by inserting a small number of genes. His breakthrough effectively showed that the development that takes place in adult tissue could be reversed, turning adult tissue back into cells that behave like embryos.

Stem cells created from adult tissue are known as induced pluripotency stem cells, or iPS cells. Because patients may one day be treated with stem cells from their own tissue, their bodies might be less likely to reject them.

The eventual aim is to provide replacement cells of all kinds, Gurdons institute explains on its website.

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Scientists win Nobel for adult stem cell discovery

DUBLIN--(BUSINESS WIRE)--

Research and Markets (http://www.researchandmarkets.com/research/dsn5rh/cancer_stem_cells) has announced the addition of the "Cancer Stem Cells Drug Pipeline Update 2012" report to their offering.

There are today 203 companies plus partners developing 243 cancer stem cells and developmental pathways drugs in 684 developmental projects in cancer. In addition, there are 3 suspended drugs and the accumulated number of ceased drugs over the last years amount to another 123 drugs. Cancer Stem Cells Drug Pipeline Update lists all drugs and gives you a progress analysis on each one of them. Identified drugs are linked to 165 different targets. These targets are further categorized on in the software application by 38 classifications of molecular function and with pathway referrals to BioCarta, KEGG and NetPath.

Drug Pipeline Update at a Glance

Investigators

Includes more than 203 principal investigators plus their collaborators. There is direct access from inside the application to web pages of all principal investigators.

Note: You are able to sort and find drugs according to investigators and partners from drop-down menus in the application. You may also sort and find drugs according to country of investigator.

Drug name & Synonyms

Lists commercial, generic and code names for drugs.

Developmental stage

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Research and Markets: Cancer Stem Cells Drug Pipeline Update 2012 Includes More Than 203 Principal Investigators plus ...

Thomas Perlmann of Karolinska Institute presents Sir John B. Gurdon of Britain and Shinya Yamanaka of Japan as winners of the 2012 Nobel Prize in medicine or physiology. The prize committee at Stockholms Karonlinska institute said the discovery has revolutionized our understanding of how cells and organisms develop. Photograph by Bertil Enevag Ericson/Scanpix/AP Photo

Stem cells derived from a mouses skin won Shinya Yamanaka the Nobel Prize yesterday. Now researchers in Japan are seeking to use his pioneering technology for an even greater prize: restoring sight.

Scientists at the Riken Center for Developmental Biology in Kobe plan to use so-called induced pluripotent stem cells in a trial among patients with macular degeneration, a disease in which the retina becomes damaged, resulting in loss of vision, Yamanaka told reporters in San Francisco yesterday.

Companies including Pfizer Inc. (PFE) are already planning trials of stem cells derived from human embryos. The Japanese study will be the first to use a technology that mimics the power of embryonic cells while avoiding the ethical controversy that accompanies them.

The work in that area looks very encouraging, John B. Gurdon, 79, a professor at the University of Cambridge who shared the Nobel with Yamanaka yesterday, said in an interview in London.

Yamanaka and Gurdon shared the 8 million Swedish kronor ($1.2 million) award for experiments 50 years apart that showed that mature cells retain in latent form all the DNA they had as immature stem cells, and that they can be returned to that potent state, offering the potential for a new generation of therapies against hard-to-treat diseases such as macular degeneration.

In a study published in 1962, Gurdon took a cell from a tadpoles gut, extracted the nucleus, and inserted it into the egg cell of an adult frog whose own nucleus had been removed. That reprogrammed egg cell developed into a tadpole with the genetic characteristics of the original tadpole, and subsequent trials yielded adult frogs.

Yamanaka, 50, a professor at Kyoto University, built on Gurdons work by adding four genes to a mouse skin cell, returning it to its immature state as a stem cell with the potential to become any cell in the body. He dubbed them induced pluripotent stem cells.

There are few moments in science that are undisputed as genuine elegant creativity and simplicity, Alan Trounson, the president of the California Institute for Regenerative Medicine in San Francisco, said in an e-mail. Shinya Yamanaka is responsible for one of those. An extraordinary accomplishment by a genuinely modest and brilliant scientist.

The technology may lead to new treatments against diseases such as Parkinsons by providing replacement cells.

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Nobel Winner’s Stem Cells to Be Tested in Eye Disease Next Year

Imagine the horror of a soldier losing a limb on the battlefield, or a loved one having a body part amputated due to diabetes. But, what if they could restore their limbs by activating their stem cells?

New Mexico State University biologist Graciela Unguez and a team of researchers found that electric fish, a vertebrate animal just like humans, can regenerate their tails following amputation after activating their stem cells. The findings were published in the May 2012 edition of the scientific journal, PLOS One.

"What's surprising is that as humans, we're one of the few animal species that do not readily regenerate limbs, organs or most tissues," Unguez said. "So, there's a lot of interest in how these fish do it, and what's preventing us from doing it."

Regeneration is the process of restoring lost cells, tissues or organs. According to Unguez, most animals have the ability to regenerate eyes and tails and some animals may be able to regenerate up to half of their bodies.

The researchers discovered that when they cut off up to one third of an electric fish's tail, including the spinal cord, vertebrae, muscles, skin, connective tissues and nerves, the fish would regenerate it. Unguez said the more tissue cut off, the longer the regeneration takes, but for the purpose of her study, it takes about three weeks.

"It's really exciting to us because, here's an example of an animal that can regenerate a lot of tissue types that are also found in humans," Unguez said. "So it puts into question this previous idea that those animals that can regenerate losses of many tissues do it because they do it differently than humans."

Unguez has used the electric fish as a model system to investigate the role that the nervous system plays in the fate of electrically excitable cells like muscle cells for 15 years. She noted that for many years, scientists have thought that highly regenerative animals use a mechanism of regeneration that does not involve stem cells, and this stem cell-based mechanism is well known in humans. In contrast, the stem cell-independent mechanism found in highly regenerative animals is not normally active in humans.

Unguez explained that stem cells are a small population of cells that do not mature and stay with us throughout our life, and then when called upon, they reenter the cell cycle to become muscle cells, neurons, skill cells and such.

But, what Unguez and her collaborators discovered was the opposite. The electric fish actually activated its own muscle and electric organ stem cells to regenerate. She said the adult fish regenerated unendingly with the activation of their stem cells.

"It does not negate other mechanisms, but it definitely showed that it was largely due to an activation of stem cells, just like humans have," Unguez said. "So maybe it's not as far apart, maybe some of the mechanisms involved or the events that need to be activated are more closely related than we thought."

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Electric fish at NMSU activate stem cells for regeneration

8 October 2012 Last updated at 22:25 ET By Regan Morris BBC News, Los Angeles

US researchers say they will redouble their efforts to create human sperm from stem cells following the success of a Japanese study involving mice.

A Kyoto University team used mice stem cells to create eggs, which were fertilised to produce baby mice.

Dr Renee Pera, of Stanford University in California, aims to create human sperm to use for reproduction within two years, and eggs within five years.

Infertility affects up to 15% of reproductive-aged couples worldwide.

"I know people think it's Frankenstein medicine, but I think it's not an imagined or lessened health problem - infertility affects your whole life," Dr Pera says.

"To have sex and have a baby would be a super simple decision, but not everybody can do it."

But using embryonic stem cells for research - as Dr Pera's lab at the Institute for Stem Cell Biology and Regenerative Medicine does - is controversial because the embryos are destroyed in order to use them.

Dr Pera's lab uses embryos left over from IVF treatments.

Stem cells have the potential to grow into any cell in the body. Creating eggs in a lab could become mainstream, much like IVF is viewed today.

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US team aim to make human sperm