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“Junk” DNA Holds Clues to Common Diseases

October 7th, 2012 4:03 pm

When the draft of the human genome was published  in 2000, researchers thought that they had obtained the secret decoder ring for the human body. Armed with the code of 3 billion basepairs of As, Ts, Cs and Gs and the 21,000 protein-coding genes, they hoped to be able to find the genetic scaffolds of life --both in sickness and in health. [More]

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Are Phage Viruses the Forgotten Cure for Superbugs? [Excerpt]

October 7th, 2012 4:03 pm

Excerpted from The Forgotten Cure: The Past and Future of Phage Therapy , by Anna Kuchment . (Copernicus Books, 2011. Reprinted by   permission of Springer Science+Business Media)

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Researcher Alert: California Stem Cell Agency Tightening Budget Oversight on Grants

October 7th, 2012 4:03 pm


Some of California's top stem cell
researchers are going to have to sharpen their spreadsheets if they
want to win money from the state's $3 billion stem cell agency.

The agency is moving to beef up
scrutiny of the high-profile, big-ticket grant applications
that it will consider during the next several years. The effort may well extend to all grant programs. The move also makes
it clear to researchers that the CIRM staff is in the driver's seat
when it comes to budgeting on research projects.
The plan was laid out this week in a memo to directors of the California Institute for Regenerative Medicine (CIRM) by Ellen Feigal, the agency's senior vice
president for research and development. She said,

“Increasing the importance of
budgetary review will encourage applicants to propose rigorous,
realistic and vetted budgets, and will further our mission to be good
stewards of taxpayer dollars. These additions will not significantly
increase the workload burden on GWG members (grant reviewers) and
explicitly acknowledge that program goals, scientific plans, accurate budgeting and prudent spending are inextricably linked.”

The proposal comes before the CIRM
directors' Science Subcommittee next Monday and would alter the
closed-door grant review process in the following manner, according
to Feigal's memo.

• “To assist GWG review,
appropriate expertise on budget and financial matters (e.g., this
could be in the form of a specialist reviewer, or can also be
assigned to a GWG reviewer with the appropriate background and
expertise), will review applications for sound budgeting and provide
comments or questions to the GWG for consideration by the reviewers
before the reviewer’s final scores are entered.
• “If the financial/budgetary
matter potentially directly impacts on the design or feasibility of
conducting the project, the GWG may consider this issue in the
scoring; otherwise, budgetary and financial issues and questions will
not contribute to the scientific score.
• “As appropriate, review summaries
sent to the ICOC (the CIRM governing board) will identify scientific
as well as budget or other issues. To the extent endorsed by the
GWG, the review summaries will also identify potential resolution
should the ICOC approve a given award with budget issues.
• “CIRM officers should be provided
explicit discretion to consider the budget comments, as well as
budget or other issues. To the extent endorsed by the GWG, the
review summaries will also identify potential resolution should the
ICOC approve a given award with budget issues.”

Feigal's memo clearly indicates that
CIRM staff has experienced push-back from recalcitrant researchers
when efforts have been made to bring costs under control. She noted that
the agency's staff examines a research project's budget during the
“prefunding” review that follows board approval. However, Feigal
said, at that stage, “It is often challenging to make substantive
changes to the budget, based on appropriateness of study activities
and costs, given the ICOC approval at a given budget amount.”
The agency has already examined some
budgets prior to board approval. One grant review in a $200
million-plus round this summer, for example, declared that costs to
prepare regulation packages had “overlap” and were “excessive,”
along with costs dealing with manufacturing and per patient expenses.
That was for a high-scoring application by Antoni Ribas of UCLA, and
he was not alone.
In her memo, Feigal listed other cases
of budgetary shortcomings in recent applications:,

• “Budget does not align with the
program deliverables and milestones. For example, the budget
includes activities not relevant to project objective(s) or that are
out of scope.
•”Budget does not contain adequate
expenses for known costs. For example, an applicant may budget
$100,000 for a GMP manufacturing run of a biologic in which it is
generally accepted knowledge that the actual expenses are typically
much greater.
•“Budget item significantly exceeds
a known cost or seems excessive without adequate justification. For
example, an applicant may propose a surgical expense of $100,000 per
patient for a procedure with Medicare reimbursement set at $15,000.
•“Cost allocations are not done
properly. For example, an applicant is developing the same
therapeutic candidate for 3 indications, and is applying for CIRM
funding for 1 of the 3, but is charging CIRM for the cost of the
entire manufacturing run.”

Initially, the budgetary review would
be used in disease team, early translational, strategic partnership
rounds, and any new rounds “as deemed appropriate.” Feigal said,
however, that “all applications for CIRM awards should be
carefully examined for budgetary appropriateness.”
Our take: This seems to be a
well-advised move, albeit one that is not likely to find favor with
researchers accustomed to loose oversight. It moves budgetary review
to an earlier stage and gives the CIRM directors a chance to weigh in
on those matters prior to approval of grants, instead of creating a
sense of entitlement on the part of recipients that may pop up
following board approval of their applications. Indeed, the plan
makes such good sense that it raises the question why it was not in
place years ago.
A final note: Feigal's memo is an
excellent example of the type of information that clarifies issues
and helps CIRM directors make the best possible decisions. It
provides some history, good evidence for a change and an explanation
of benefits. Additionally, the memo is timely, having been posted on
the CIRM website sufficiently in advance of next week's meeting to give affected parties and others time to comment
and make constructive suggestions. The memo is also far superior to
the Power Point presentations that are often submitted to the board
minus any nuanced, written discussion of the issue at hand.
Next week's meeting will be based in
San Francisco but also has teleconference locations in Irvine (2), La
Jolla, Stanford, Pleasanton, Oakland and Los Angeles where the public
and researchers can participate. The specific addresses can be found on the agenda.

Source:
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UCD’s Knoepfler’s ‘Somewhat Provocative Paper’ on iPS

October 7th, 2012 4:03 pm


UC Davis researcher Paul Knoepfler is
the rare stem cell scientist who blogs about his work as well as
writing about issues in the field.

Over the weekend, he posted an item on
what he described as a “somewhat provocative paper” published by his lab in
“Stem Cells and Development.”  He said the paper argued
that iPS cells “are very similar in some ways to cancer cells.”
Most of his item deals with the
technical details and background of the research. But at the end of
this item, Knoepfler wrote,

“So what does this mean in the big
picture? 

“I believe that iPS cells and cancer
cells are, while not the same, close enough to be called siblings. As
such, the clinical use of iPS cells should wait for a lot more study.
Even if scientists do not use iPS cells themselves for transplants,
but instead use differentiated derivatives of iPS cells, the risk of
patients getting malignant cancers cannot be ignored. 

“At the same time, the studies
suggest possible ways to make iPS cells safer and support the notion
of reprogramming cancer cells as an innovative new cancer therapy. 

“Stay tuned in the next few days for
part 2 where I will discuss what this paper went through in terms of
review, etc. to get published. It wasn’t a popular story for some
folks.”

The UC Davis press release on the
research, which was financed by the California stem cell agency and the NIH,  was picked up by several online sites, including Redorbit,
Medicalexpress and geekosystem.

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From Stem Cells To Mouse Eggs To Baby Mice – No Father Involved

October 7th, 2012 6:20 am

The scientists, from Kyoto University, first produced healthy mouse pups in 2011 using stem cell-derived sperm. They have now achieved the same by using eggs which were created in the same way.

Scientists are describing the Kyoto team's feat as a "significant achievement" which will have a profound impact on reproductive cell biology and genetics research.

In both cases, the scientists used ES (embryonic stem) cells and iPS (induced pluripotent stem) cells. ES are taken from embryos while iPS come from reprogrammed adult tissue cells that mimic stem cell behavior.

Theory suggests that both ES and iPS cells can produce all the cell types in the body. However, the majority of scientists have not been able to make them turn into germ cells, which eventually become eggs or sperm.

Mitinori Saitou and team hit upon a process that managed to turn stem cells into germ cells. They started off with ES and iPS cells and cultured them into a mix of proteins to produce primordial germ cell-like cells.

Their aim was to get precursor egg cells, known as oocytes. They mixed the primordial cells with fetal ovarian cells, and formed reconstituted ovaries which were grafted onto natural ovaries within live mice. Exactly four weeks and four days later, the primordial germ cell-like cells had turned into oocytes. The ovaries were removed from the mice and the oocytes harvested, fertilized in petri dishes, and the resulting embryos were implanted into surrogate mothers.

Within around three weeks, the surrogate mothers gave birth to healthy mouse pups.

The journal Science quoted Davor Solter, from Singapore's Institute of Medical Biology, as saying:

The team now plan to get a better understanding of the molecular mechanisms that were at work when the germ cells were being formed.

They believe that they may eventually be able to coax the cells through the entire oocyte development process in a lab dish, effectively bypassing the grafting.

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From Stem Cells To Mouse Eggs To Baby Mice - No Father Involved

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Eggs produced from stem cells

October 7th, 2012 6:20 am

Published: Oct. 5, 2012 at 3:23 PM

KYOTO, Japan, Oct. 5 (UPI) -- Mouse stem cells have been used to create eggs and sperm producing healthy offspring, a result that may aid human fertility, Japanese scientists say.

If the procedure can be repeated in humans the technique could make it easier for women in their 30s or 40s to have children and could help men and women whose reproductive organs have been damaged by cancer treatments or other causes.

"These studies provide that next level of evidence that in the future fertility could be managed with stem cell intervention," Teresa Woodruff, chief of fertility preservation at Northwestern University's Feinberg School of Medicine, told the Los Angeles Times.

Using stem cells to grow new eggs is particularly important since women are born with a set number and don't make more once they are gone.

The stem cell technique would in effect allow them to turn back their biological clocks, Stanford stem cell researcher Renee A. Reijo Pera said.

"This is a get-them-back strategy," she said.

About 10 percent of American women of childbearing age have trouble becoming or staying pregnant, and more than one-third of infertile couples are dealing with a medical problem in the prospective father, the national Centers for Disease Control and Prevention in Atlanta said.

Dr. Mitinori Saitou and colleagues at Kyoto University detailed how they generated the functional mouse eggs in the journal Science and the same researchers reported doing the same thing with mouse sperm last year.

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Skin stem cells may help avoid blindness

October 7th, 2012 6:19 am

Published: Oct. 7, 2012 at 1:05 AM

NEW YORK, Oct. 7 (UPI) -- An experimental treatment using skin cells to improve the vision of blind mice may help those with macular degeneration, U.S. researchers say.

Dr. Stephen Tsang of the Columbia University Medical Center in New York and colleagues said the findings suggest induced pluripotent stem cells -- derived from adult human skin cells but with embryonic properties -- could soon be used to restore vision in people with macular degeneration.

"With eye diseases, I think we're getting close to a scenario where a patient's own skin cells are used to replace retina cells destroyed by disease or degeneration," Tsang said in a statement. "It's often said that induced pluripotent stem cells transplantation will be important in the practice of medicine in some distant future, but our paper suggests the future is almost here."

Like embryonic stem cells, induced pluripotent stem cells can develop into any type of cell.

None of these cells has been transplanted into people, but many ophthalmologists said the eye is the ideal testing ground.

"The eye is a transparent and accessible part of the central nervous system, and that's a big advantage," Tsang said. "We can put cells into the eye and monitor them every day with routine non-invasive clinical exams and in the event of serious complications, removing the eye is not a life-threatening event."

The study was published online in advance the print edition of Molecular Medicine

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Proteonomix, Inc. Announces IRB Approval for Its Clinical Trial of UMK-121 in Patients with End Stage Liver Disease

October 7th, 2012 6:14 am

PARAMUS, N.J., Oct. 4, 2012 /PRNewswire/ --PROTEONOMIX, INC. (PROT), a biotechnology company focused on developing therapeutics based upon the use of human cells and their derivatives, announced today that the Company's clinical trial of UMK-121 has received IRB (Institutional Review Board) approval and is now ready for the recruitment of patients.

We thank the University of Medicine & Dentistry of New Jersey for providing the IRB and their invaluable contribution to this study of the UMK-121 drug therapy on patients with End Stage Liver Disease.

To better understand what a clinical trial is please visit the following links: Overview; Rising Cost of Clinical Trial; Additional information on Clinical Trials .

As previously announced, the Company entered into an Agreement to conduct the clinical trial with the UMDNJ. That Agreement required the Company to pay expenses associated with the clinical study which the Company has done to date.

Michael Cohen, President of the Company, stated: "The financing that was required to complete the Company's obligation with respect to the Trial was provided by the private placement of our Series E Preferred Stock on Friday, March 9, 2012. We previously announced that we have engaged the University to conduct the trial and thanked the University for their assistance with the finalization of the agreement to conduct a clinical trial of UMK-121. The Company has previously described the terms of the agreement to license and develop and the patent application of the UMK-121 technology. The Company will work together with the University and the principal investigators to initiate the clinical study. The approval of the IRB was required before the study could go forward. The investigators can now accept patients into the study."

About the University of Medicine and Dentistry of New Jersey

The University of Medicine and Dentistry of New Jersey (UMDNJ) is New Jersey's only health sciences university with more than 6,000 students on five campuses attending three medical schools, the State's only dental school, a graduate school of biomedical sciences, a school of health related professions, a school of nursing and New Jersey's only school of public health. UMDNJ operates University Hospital, a Level I Trauma Center in Newark, and University Behavioral HealthCare, which provides a continuum of healthcare services with multiple locations throughout the State.

About Proteonomix, Inc.

Proteonomix is a biotechnology company focused on developing therapeutics based upon the use of human cells and their derivatives. The Proteonomix family of companies includes Proteoderm, StromaCel, PRTMI and THOR Biopharma. Proteoderm is a wholly owned subsidiary that has developed an anti-aging line of skin care products. StromaCel develops therapeutic modalities for the treatment of cardiovascular disease and for treatment of patients who have suffered post-myocardial infarction. Proteonomix Regenerative Translational Medicine Institute, Inc. (PRTMI) intends to focus on the translation of promising research in stem cell biology and cellular therapy to clinical applications of regenerative medicine. Additional information is available at http://www.proteonomix.com and http://www.proteoderm.com.

Forward-looking statements:

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Healthy Mice Created From Skin Stem Cells In Lab

October 6th, 2012 7:24 am

October 5, 2012

Lee Rannals for redOrbit.com Your Universe Online

Japanese scientists reported in the journal Science that they have created life using stem cells made from skin.

The skin cells were used to create eggs which were then fertilized to produce baby mice, who later had their own babies.

The technique has implications that may possibly help infertile couples have children, and maybe could even allow women to overcome menopause.

About one in 10 women of childbearing age face trouble becoming a parent, according to the Centers for Disease Control and Prevention (CDC).

Last year, the scientists at Kyoto University were able to make viable sperm from stem cells. In the more recent study, the team was able to perform a similar accomplishment with eggs.

The researchers used two sources, including those collected from an embryo and skin-like cells, that were reprogrammed into becoming stem cells.

After turning the stem cells into early versions of eggs, they rebuilt an ovary by surrounding the early eggs with other types of supporting cells normally found in an ovary.

They used IVF techniques to collect the eggs, fertilize them with sperm from a male mouse and implant the fertilized egg into a surrogate mother.

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Healthy Mice Created From Skin Stem Cells In Lab

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Stem cells: of mice and women?

October 6th, 2012 7:24 am

And rightly so: stem-cell scientists have derived many types of cells from stem-cell precursors, but have in the past struggled with sex cells. The research by a team at Kyoto University provides a powerful model into mammalian development and infertility, but it is still a long way off from being used in human therapy.

Despite this fact, it did not stop the headlines in some of today's press screaming that infertile women could one day become pregnant by creating eggs from stem cells.

Evelyn Telfer, a reproductive biologist at the University of Edinburgh, told me this study has no clinical application to humans whatsoever because the tissue used in this study were all foetal and not adult cells.

Mitinori Saitou led a team using foetal mouse tissue from embryos or skin cells to create stem cells. Those stem cells were then genetically reprogrammed to become germ cells egg precursor cells.

These were then given a cocktail of "factors" to support their growth into mature eggs. The eggs were fertilised by IVF in the lab and then implanted into surrogate mice. Three baby mice were born and grew into fertile adults.

The fact that artificially manufactured eggs have gone on to produce healthy mice which are fertile is absolutely astounding and a great step forward for science. The results are published in the journal, Science.

But there are huge differences between human and mouse cells, not to mention the medical and ethical issues surrounding human ovarian tissue to culture cells.

Further clinical trials would be necessary using adult mouse cells first before we can start projecting that we can manufacture babies, and scientists need to learn so much more about how women form eggs.

So while this is major contribution to the field of reproductive biology, the study is not a ready-made cure for women with fertility problems.

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Stem cells: of mice and women?

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Fertility Research Opens Possibilities for Gay and Lesbian Couples

October 6th, 2012 7:24 am

Research performed on mice to create sperm and eggs from stem cells raises possibilities for humans, with big implications for same-sex couples.

A breakthrough in fertility research lays open the possibility that gay and lesbian couples could someday have children who are completely their own, genetically speaking.

Researchers at Kyoto University in Japan have created eggs from stem cells in mice and used them to produce healthy offspring, NPR reports. They first used embryonic stem cells, then repeated the results stem cells created from adult cells, such as blood or skin. The same team previously created sperm from stem cells. Stem cells can morph into any cell in the body, observed NPR reporter Rob Stein.

If the results from mice could be duplicated in humans a far-off possibility, granted, but scientists say mice are sufficiently similar to humans that it could happen same-sex couples could create their own sperm and eggs and join them to have a child.

There are lots of lesbian and gay couples who would be very excited about the possibility for the first time of being able to have children who are genetically their own, Hank Greely, a bioethicist at Stanford University, told Stein.

Such a breakthrough could also help women who have passed their childbearing years or who are infertile for medical reasons. It raises some questions, though, about the ethics of the procedure, scientists said. For instance, could prospective parents create a child with certain desired traits, and would it be morally acceptable for them to do so?

Its like any other technology, said Daniel Sulmasy, a professor of medicine and ethics at the University of Chicago. Whatever weve done in humankind whether its discovering fire or creating the wheel you can use these things to do lots of good and you can use them immoral ways.

The Kyoto University study was published in this weeks issue of the journal Science.

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Ovarian cancer stem cells investigated

October 6th, 2012 7:24 am

Queensland scientists will investigate the genetic pathway of ovarian cancer stem cells in a bid to better understand the aggressive disease.

Dr Ying Dong and Professor Judith Clements from Queensland University of Technology have shown previously that secondary ovarian cancer tumour cells are resistant to chemotherapy.

'The key to fighting this cancer could be to identify the molecular or gene pathways that regulate it, such as the stem cells,' said Dr Dong.

'They are the cells that change and build resistance to the chemotherapy.'

The team's collaborators in India, including Dr Sharmila Bapat, were the first in the world to identify ovarian cancer stem cells.

Dr Bapat's team will use 3D modelling by Dr Dong to mimic the environment of tumours and study how ovarian cancer cells respond to chemotherapy.

'Together, we will investigate the role of these pathways and test their potential as therapeutic targets,' Dr Dong said.

'We hope we will be able to help design more effective treatment for women with ovarian cancer with this knowledge.'

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K computer may be used in regenerative medicine

October 6th, 2012 7:23 am

The Yomiuri Shimbun/Asia News Network Friday, Oct 05, 2012

The K supercomputer, which once held the world's fastest computing speed, may be used to shorten the time needed in regenerative medicine from several months, or even years, to several hours, according to the Riken Center of Developmental Biology and other institutions.

Researchers aim to create organs from human embryonic stem cells (ES cells) or induced pluripotent stem cells (iPS cells), but the length of time normally needed to accomplish this task is a problem.

The institutions hope to put regenerative medicine into practical use as soon as possible using iPS cells, a Japanese technology, and other cells, and this is where the supercomputer will come in.

Yoshiki Sasai, group director at the Riken Center, and other researchers are planning to use the K supercomputer to determine the best method to create organs from these cells.

The researchers successfully developed an optic cup, a basic part of the eye, from ES cells for the first time in the world. While it takes about six months to transform ES cells into an optic cup, the researchers spent about three years to find how to do this through trial and error.

Currently, it takes several years to complete basic experiments to transform ES cells or iPS cells into target organs, and in many cases the experiments fail to achieve their purpose.

Plans are under way to use the K supercomputer to develop new medicines, work out disaster prevention measures and conduct research on cosmic evolution and for other purposes.

Sasai and the other researchers, therefore, decided the supercomputer, which performs 10 quadrillion (or one kei in Japanese) calculations per second, would be ideal in completing basic experiments in a fraction of the time it now takes.

If the K supercomputer calculates mathematized data on divisions, growth and internal changes of iPS cells to which protein or certain kinds of genes are added, it will become possible to create target organs more effectively, according to the researchers.

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K computer may be used in regenerative medicine

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Dish-Grown Sperm and Eggs Produce Mouse Pups

October 6th, 2012 7:21 am

By Dennis Normile, ScienceNOW

Want baby mice? Grab a petri dish. After producing normal mouse pups last year using sperm derived from stem cells, a Kyoto University team of researchers has now accomplished the same feat using eggs created the same way. The study may eventually lead to new ways of helping infertile couples conceive.

This is a significant achievement that I believe will have a sustained and long-lasting impact on the field of reproductive cell biology and genetics, says Amander Clark, a stem cell biologist at University of California, Los Angeles.

The stem cells in both cases are embryonic stem (ES) cells and induced pluripotent stem (iPS) cells. The former are taken from embryos and the latter are adult tissue cells that are reprogrammed to act like stem cells. In theory, both can produce all of the bodys cell types, yet most researchers have been unable to turn them into germ cells, precursors of sperm and eggs.

The Kyoto group, led by stem cell biologist Mitinori Saitou, found a process that works. As with the sperm, the group started with ES and iPS cells and cultured them in a cocktail of proteins to produce primordial germ cell-like cells. To get oocytes, or precursor egg cells, they then mixed the primordial cells with fetal ovarian cells, forming reconstituted ovaries that they then grafted onto natural ovaries in living mice. Four weeks and 4 days later, the primordial germ cell-like cells had developed into oocytes. The team removed the ovaries, harvested the oocytes, fertilized them in vitro, and implanted the resulting embryos into surrogate mothers. About 3 weeks later, normal mouse pups were born, the researchers report online today in Science.

It is remarkable that one can produce oocytes capable of sustaining complete development starting with embryonic stem cells, says Davor Solter, a developmental biologist at Singapores Institute of Medical Biology. Clark adds that the immediate impact of the work will be on understanding the molecular mechanisms involved in forming germ cells. Saitou says that with a bit more progress in understanding the complex interactions at work, they may be able to coax the cells through the entire oocyte development process in a lab dish. If successful, we may be able to skip the grafting, he says.

Further in the future, the technique could lead to a new tool for treating infertility. This study has provided the critical proof of principle that oocytes can be generated from induced pluripotent stem cells, Clark says. If applied to humans, it could lead to the ability to create oocytes from iPS cells taken from infertile women. But Saitou cautions that moving on to human research will require resolving thorny ethical issues and technical difficulties. Solter says that at the extreme, the new approach could lead to the production of human embryos from cell lines and tissue samples. Still, he notes, defining the status of such parentless human embryos and the biological, ethical, and legal issues they will raise defies the imagination.

This story provided by ScienceNOW, the daily online news service of the journal Science.

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Walkthrough With Neuralstem

October 6th, 2012 7:18 am

10/5/2012 6:38 AM ET Amyotrophic Lateral Sclerosis is a progressive neurodegenerative disease that attacks nerve cells in the brain and spinal cord, leading to complete paralysis, and eventually, death. Also known as Lou Gehrig's disease, Amyotrophic Lateral Sclerosis, or ALS, is said to affect as many as 30,000 Americans, with 5,600 new cases being diagnosed each year.

Currently, there are two FDA-approved drugs to treat ALS namely, Sanofi-Aventis' (SNY: Quote) Riluzole, which prolongs life by 2-3 months, and Avanir Pharmaceuticals Inc.'s (AVNR: Quote) Nuedexta, which treats emotional instability that accompanies this disease.

Developing a neural stem cell therapy for ALS is Rockville, Maryland-based biotechnology company Neuralstem Inc. (CUR: Quote).

For readers who are new to Neuralstem, here's a brief overview of the company's pipeline and the upcoming events to watch out for...

The company is testing its cell product - NSI-566 human spinal cord stem cells, via transplantation technique, in the treatment of ALS symptoms. The phase I NSI-566 study was completed as recently as August of this year. This groundbreaking trial, the first to be approved by the FDA to test neural stem cells in patients with ALS, began in January 2010.

The trial was designed to enroll up to 18 patients, the last of which was treated in August of this year. The entire trial concludes six months after the final surgery.

The interim data on the NSI-566 ALS trial will be updated on October 8, 2012, according to the company.

NSI-566 will also be evaluated in treating motor deficits due to ischemic stroke. The company has received approval to commence a combined phase I/II ischemic stroke trial with NSI-566 in China, and it is expected to begin early next year.

The trial is designed to test up to 118 patients who have suffered an ischemic stroke with chronic residual motor disorder with NSI-566 cell line, 4-24 months post-stroke. The duration of the combined trial, including patient monitoring and data collection, is approximately two years.

Ischemic strokes, the most common type of stroke, occur as a result of an obstruction within a blood vessel supplying blood to the brain. After a stroke, many patients suffer from paralysis in arms and legs, which can be permanent.

Excerpt from:
Walkthrough With Neuralstem

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Fertility hope in stem cell eggs

October 6th, 2012 3:16 am

Hopes of a cure for infertility in humans were raised Friday after Japanese stem cell researchers announced they had created viable eggs using normal cells from adult mice.

The breakthrough raises the possibility that women who are unable to produce eggs naturally could have them created in a test tube from their own cells and then planted back into their body.

A team at Kyoto University harvested stem cells from mice and altered a number of genes to create cells very similar to the primordial germ cells that generate sperm in men and oocytes -- or eggs -- in women.

They then nurtured these with cells that would become ovaries and transplanted the mixture into living mice, where the cells matured into fully-grown oocytes.

They extracted the matured oocytes, fertilised them in vitro -- in a test tube -- and implanted them into surrogate mother mice.

The resulting mice pups were born healthy and were even able to reproduce once they matured.

Writing in the US journal Science, which published the findings, research leader professor Michinori Saito said the work provided a promising basis for hope in reproductive medicine.

"Our system serves as a robust foundation to investigate and further reconstitute female germline development in vitro, not only in mice, but also in other mammals, including humans," he said.

Saito cautioned that this was not a ready-made cure for people with fertility problems, adding that a lot of work remained.

"This achievement is expected to help us understand further the egg-producing mechanism and contribute to clarifying the causes of infertility," he told reporters.

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Fertility hope in stem cell eggs

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Japan team offers fertility hope with stem cell eggs

October 5th, 2012 12:20 pm

Hopes of a cure for infertility in humans were raised Friday after Japanese stem cell researchers announced they had created viable eggs using normal cells from adult mice.

The breakthrough raises the possibility that women who are unable to produce eggs naturally could have them created in a test tube from their own cells and then planted back into their body.

A team at Kyoto University harvested stem cells from mice and altered a number of genes to create cells very similar to the primordial germ cells that generate sperm in men and oocytes -- or eggs -- in women.

They then nurtured these with cells that would become ovaries and transplanted the mixture into living mice, where the cells matured into fully-grown oocytes.

They extracted the matured oocytes, fertilised them in vitro -- in a test tube -- and implanted them into surrogate mother mice.

The resulting mice pups were born healthy and were even able to reproduce once they matured.

Writing in the US journal Science, which published the findings, research leader professor Michinori Saito said the work provided a promising basis for hope in reproductive medicine.

"Our system serves as a robust foundation to investigate and further reconstitute female germline development in vitro, not only in mice, but also in other mammals, including humans," he said.

Saito cautioned that this was not a ready-made cure for people with fertility problems, adding that a lot of work remained.

"This achievement is expected to help us understand further the egg-producing mechanism and contribute to clarifying the causes of infertility," he told reporters.

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Japan team offers fertility hope with stem cell eggs

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Baby Mice Born from Eggs Made from Stem Cells

October 5th, 2012 10:27 am

Mouse pups from induced pluripotent stem cell-derived eggs; image courtesy of Katsuhiko Hayashi

Stem cells have been coaxed into creating everything from liver cells to beating heart tissue. Recently, these versatile cells were even used to make fertile mouse sperm, suggesting that stem cell technology might eventually be able to play a role in the treatment of human infertility. Now two types of stem cells have been turned into viable mouse egg cells that were fertilized and eventually yielded healthy baby mice. Details of this achievement were published online October 4 in Science.

Mouse oocytes; image courtesy of Katsuhiko Hayashi

Katsuhiko Hayashi, of Kyoto University's School of Medicine, were able to create the eggs with embryonic stem cells as well as with induced pluripotent stem cells (formed from adult cells). The team started with female embryonic stem cells and then coaxed them genetically to revert to an earlier developmental stage (primordial germ cell-like cells). These cells were blended with gonadal somatic cells, important in the development of sexual differentiation, to create "reconstituted ovaries." The researchers then transplanted these cultured assemblages into female mice (in either the actual ovary or the kidney) for safekeeping and to allow the stem cells to mature into oocytes in a natural environment.

Healthy adult mice from litter produced from induced pluripotent stem cell-based oocytes; image courtesy of Katsuhiko Hayashi

To test the eggs' fertility, the new oocytes were removed from the mice for an in vitro fertilization with mouse spermand then re-implanted into the female mice. The experimental females went on to bear normally developing and fertile offspring. The procedure was then also performed successfully with induced pluripotent stem cells from adult skin cells with similar results. "Our system serves as a robust foundation to investigate and further reconstitute female germline development in vitro," the researchers noted in their paper," not only in mice, but also in other mammals, including humans."

Follow Scientific American on Twitter @SciAm and @SciamBlogs. Visit ScientificAmerican.com for the latest in science, health and technology news. 2012 ScientificAmerican.com. All rights reserved.

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Baby Mice Born from Eggs Made from Stem Cells

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Scientists Create Healthy Mice Using Eggs Made From Stem Cells [Science]

October 5th, 2012 10:27 am

A team of Japanese scientists has managed to turn mouse stem cells into viable eggsthat can be inseminated and go on to produce normal, healthy mouse pups. The finding has massive implications for the development of infertility treatments in the future.

The team of researchers from Kyoto University has previously created fully grown adult mice using sperm created from stem cellsbut that's comparatively straightforward. Sperm, you see, are some of the simpler cells in the body: eggs are far more complex.

In this new study, published in Science, the researchers took embryonic stem cells, and induced pluripotent stem cells (iPSCs) from them. They then used a host of signaling molecules to slowly transform the iPSCs into egg precursors known as primordial germ cells. After further coddling in lab-grown ovary tissue, the cellsover the course of four weeksmatured into eggs.

The scientists fertilized these eggs and transplanted the resulting embryos in to foster mothers. A short while later, healthy offspring emerged, which went on to become fertile themselves. All in, it's a long and involved processbut, amazingly, it works.

The finding gives a useful glimpse into the processes at play during meiosis, the cell-division process which is peculiar to sex cells like eggs. But perhaps more interesting are the possibilities for the development of new infertility treatments in the future.

As ever, just because something's possible in a mouse doesn't mean it will necessarily work in a human model, but that won't stop the team trying: indeed, they're already starting to work with human stem cells instead. Expect a wait before you hear of this kind of technology being used in a clinical, as opposed to research, setting, though, because the ethical issues surrounding it will be close to impossible to settle. [Science via Nature]

Image by angeladellatorre under Creative Commons license

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Scientists Create Healthy Mice Using Eggs Made From Stem Cells [Science]

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Stem cells could lead to future fertility treatments, study says

October 5th, 2012 10:27 am

In a long-sought achievement, Japanese researchers have demonstrated in mice that both eggs and sperm can be grown from stem cells and combined to produce healthy offspring, pointing the way to a new avenue for fertility treatments.

If the milestone accomplishment can be repeated in humans -- and experts said they are optimistic that such efforts will ultimately succeed -- the technique could make it easier for women in their 30s or 40s to become mothers. It could also help men and women whose reproductive organs have been damaged by cancer treatments or other causes.

About 10% of American women of childbearing age have trouble becoming or staying pregnant, and more than one-third of infertile couples must contend with a medical problem related to the prospective father, according to the U.S. Centers for Disease Control and Prevention in Atlanta.

Using current technology, only about one-third of attempts at assisted reproduction result in live births, CDC data show. Scientists, doctors and patients would like to boost that percentage.

"These studies provide that next level of evidence that in the future fertility could be managed with stem cell intervention," said Teresa Woodruff, chief of fertility preservation at Northwestern University's Feinberg School of Medicine.

The prospect of using stem cells to grow new eggs is particularly tantalizing, because women are born with a set amount and don't make more once they are lost. In a sense, the therapy would allow them to turn back their biological clocks, said Stanford stem cell researcher Renee A. Reijo Pera, who studies reproduction.

"This is a get-them-back strategy," she said.

Using stem cells to create sperm and eggs in mice is a feat researchers have attempted, without much success, for more than a decade, said Dr. George Q. Daley, a leading stem cell researcher at Children's Hospital in Boston.

Dr. Mitinori Saitou and colleagues at Kyoto University detailed how they generated the functional mouse eggs in a report published online Thursday by the journal Science. Last year, the researchers reported in the journal Cell that they had done the same thing with mouse sperm.

In both cases, the team started with embryonic stem cells, which have the potential to develop into all of the different types of cells in the body. The scientists exposed the embryonic stem cells to stimuli that coaxed them to become egg and sperm precursors.

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