March 12, 2015 // R. Colin Johnson

Living beating hearts on-a-chip were recently created from pluripotent stem cells discovered by 2010 Kyoto Prize Winner, Shinya Yamanaka.

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Bioengineers at the University of Berkeley aim to create all of the human organs on-a-chip then connect them with micro-fluidic channels to create a complete human-being on-a-wafer.

"We have learned how to derive almost any type of human tissue from skin stem cells as was first discovered by Yamanaka," professor Kevin Healy told EE Times. "Our initial application is drug screening without having to use animals, but putting organs-on-a-chip using the stem cells of the patient could help with genetic diseases as well."

"For instance, one drug might solve a heart problem, but create toxins in the liver," Healy told us. "Which would be much better to find out before administering to the patient."

As to creating living robots in this way, Healy said that was not their mission on the current project, since their funding in coming from the National Institutes of Health's (NIH's) Tissue Chip for Drug Screening Initiative, an interagency collaboration specifically aimed at developing 3-D human tissue chips for drug screening.

However, the technology being creating, especially the microfluidic channels connecting the organs-on-a-chip so that they interact, could someday serve as a basis for making robot-like creatures.

"What we would need for that is sensors and actuators. Sensors would be the easiest, but MIT in particular is working on artificial muscles to serve as actuators," Healy told us.

Living beating hearts on-a-chip were recently created from pluripotent stem cells discovered by 2010 Kyoto Prize Winner, Shinya Yamanaka.

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Heart on-a-chip beats

Researchers have recently converted human skin cells into appetite controlling neurons for the first time ever, which might eventually provide obesity cure.

The study, led by researchers at Columbia University Medical Center (CUMC) and at the New York Stem Cell Foundation (NYSCF), found that cells provided individualized model for studying obesity and testing treatments.

To make the neurons, human skin cells were first genetically reprogrammed to become induced pluripotent stem (iPS) cells. Like natural stem cells, iPS cells are capable of developing into any kind of adult cell when given a specific set of molecular signals in a specific order.

The iPS cell technology has been used to create a variety of adult human cell types, including insulin-producing beta cells and forebrain and motor neurons.

The CUMC/NYSCF team determined which signals are needed to transform iPS cells into arcuate hypothalamic neurons, a neuron subtype that regulates appetite. The transformation process took about 30 days.

The neurons were found to display key functional properties of mouse arcuate hypothalamic neurons, including the ability to accurately process and secrete specific neuropeptides and to respond to metabolic signals such as insulin and leptin.

The study is published in the Journal of Clinical Investigation. (ANI)

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Human skin may harbor obesity cure

IMAGE:This is Assistant Professor of Biology Jason Meyer, Ph.D. of the School of Science at Indiana University-Purdue University Indianapolis with graduate students Sarah Ohlemacher (left) and Akshaya Sridhar. view more

Credit: School of Science at Indiana University-Purdue University Indianapolis

INDIANAPOLIS -- Jason Meyer, Ph.D., assistant professor of biology in the School of Science at Indiana University-Purdue University Indianapolis, has received a National Institutes of Health grant to study how glaucoma develops in stem cells created from skin cells genetically predisposed to the disease. The five-year, $1.8 million grant is funded by the NIH's National Eye Institute.

Glaucoma is a group of degenerative diseases that damage the eye's optic nerve and can result in vision loss and blindness. It is the most common disease that affects retinal ganglion cells. These cells serve as the connection between the eye and the brain. Once these cells are damaged or severed, the brain cannot receive critical information, leading to blindness.

Meyer's research uses human induced pluripotent stem cells, which can be generated from any cell in the body. In this case, they are created from skin cells of patients predisposed to glaucoma. These cells are genetically reprogrammed and then given instructions to develop into cells of the eye's retina.

"Our hope is that because these cells have the genetic information to develop the disease, they will do so in our lab," Meyer said. "Hopefully, we can figure out what goes wrong in those cells and then develop new ways to fix that."

Meyer and two School of Science graduate students are now creating the stem cells and observing their features to determine what isn't going the way it should. They will determine whether they can identify the cause of damage or death of the retinal ganglion cells.

"This is a five-year award, so our hope is that toward the end of the award we can use the information we gather to start developing customized strategies to fix what's going wrong," Meyer said.

He sees this as an exciting approach to stem cell research. Often, stem cells are transplanted to replace cells damaged by disease. While that's a possibility, Meyer's research instead could lead to repairing the existing cells in the eye and restoring vision for patients.

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IUPUI biologist receives NIH grant to study how glaucoma develops in stem cells

Testing breast cancer cells for how closely they resemble stem cells could identify women with the most aggressive disease, a new study suggests.

Researchers found that breast cancers with a similar pattern of gene activity to that of adult stem cells had a high chance of spreading to other parts of the body.

Assessing a breast cancer's pattern of activity in these stem cell genes has the potential to identify women who might need intensive treatment to prevent their disease recurring or spreading, the researchers said.

Adult stem cells are healthy cells within the body which have not specialised into any particular type, and so retain the ability to keep on dividing and replacing worn out cells in parts of the body such as the gut, skin or breast.

A research team from The Institute of Cancer Research, London, King's College London and Cardiff University's European Cancer Stem Cell Research Institute identified a set of 323 genes whose activity was turned up to high levels in normal breast stem cells in mice.

The study is published today (Wednesday) in the journal Breast Cancer Research, and was funded by a range of organisations including the Medical Research Council, The Institute of Cancer Research (ICR), Breakthrough Breast Cancer and Cancer Research UK.

The scientists cross-referenced their panel of normal stem cell genes against the genetic profiles of tumours from 579 women with triple-negative breast cancer - a form of the disease which is particularly difficult to treat.

They split the tumour samples into two categories based on their 'score' for the activity of the stem cell genes.

Women with triple-negative tumours in the highest-scoring category were much less likely to stay free of breast cancer than those with the lowest-scoring tumours. Women with tumours from the higher-scoring group had around a 10 per cent chance of avoiding relapse after 10 years, while women from the low-scoring group had a chance of around 60 per cent of avoiding relapse.

The results show that the cells of aggressive triple-negative breast cancers are particularly 'stem-cell-like', taking on properties of stem cells such as self-renewal to help them grow and spread. They also suggest that some of the 323 genes could be promising targets for potential cancer drugs.

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'Stem cell' test could identify most aggressive breast cancers

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A team of European researchers has devised a strategy to ensure that adult epidermal stem cells are safe before they are used as treatments for patients. The approach involves a clonal strategy where stem cells are collected and cultivated, genetically modified and single cells isolated before being rigorously tested to make sure they meet the highest possible safety criteria. The strategy, which is published online in EMBO Molecular Medicine, is inspired by the approaches the biotechnology industry and regulatory affairs authorities have adopted for medicinal proteins produced from genetically engineered mammalian cells.

"Until now there has not been a systematic way to ensure that adult epidermal stem cells meet all the necessary requirements for safety before use as treatments for disease," says EMBO Member Yann Barrandon, Professor at Lausanne University Hospital, the Swiss Federal Institute of Technology in Lausanne and the lead author of the study. "We have devised a single cell strategy that is sufficiently scalable to assess the viability and safety of adult epidermal stem cells using an array of cell and molecular assays before the cells are used directly for the treatment of patients. We have used this strategy in a proof-of-concept study that involves treatment of a patient suffering from recessive dystrophic epidermolysis bullosa, a hereditary condition defined by the absence of type VII collagen which leads to severe blistering of the skin."

The researchers cultivated epidermal cells from the patient that can be used to regenerate skin. The scientists used their array of tests to determine which of the transduced cells met the necessary requirements for stemness -- the characteristics of a stem cell that distinguish it from a regular cells -- and safety. Clonal analysis revealed that the transduced stem cells varied in their ability to produce functional type VII collagen. When the most viable, modified stem cells were selected, transplantation onto immunodeficient mice regenerated skin that did not blister in the mouse model system for recessive dystrophic epidermolysis bullosa and produced functional type VII collagen. Safety was assessed by determining the sites of integration of the viral vector, looking for rearrangements and hit genes, as well as whole genome sequencing.

"Our work shows that at least for adult epidermal stem cells it is possible to use a clonal strategy to deliver a level of safety that cannot be obtained by other gene therapy approaches. A clonal strategy should make it possible to integrate some of the more recent technologies for targeted genome editing that offer more precise ways to change genes in ways that may further benefit the treatment of disease. Further work is in progress in this direction."

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The above story is based on materials provided by EMBO - excellence in life sciences. Note: Materials may be edited for content and length.

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Quality control for adult stem cell treatment

Exposure to TGF-beta prompts changes that help mouse tumor stem cells evade drugs

IMAGE:To see how the growth signal TGF-beta influences cancer cells, the researchers used a red tag (top) to mark mouse tumor stem cells that received the signal, and a green... view more

Credit: Laboratory of Mammalian Cell Biology and Development

In theory, a tumor is an army of clones, made up of many copies of the original cancerous cell. But tumor cells don't always act like duplicates, and their unpredictable behavior can create problems for treatment. For while some cells within a tumor succumb to anti-cancer drugs, others may survive to bring the cancer back to life once therapy has ended.

In a study published today (February 26) in Cell, researchers at Rockefeller University home in on one culprit that fuels this variable vulnerability within squamous cell cancers: exposure to a signal known as TGF-, given off by immune cells that congregate next to a tumor's blood vessels.

"There are several reasons why some cancer stem cells, the cells at the root of tumors and metastases, can withstand therapy meant to eradicate them. Our results point to the importance of the environment immediately surrounding the skin cancer stem cells, specifically, their exposure to the signal TGF-," says senior researcher Elaine Fuchs, Rebecca C. Lancefield Professor, head of the Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development and a Howard Hughes Medical Institute investigator. "Ultimately, we hope this new insight could lead to better means for preventing the recurrence of these life-threatening cancers, which can occur in the skin, head, neck, esophagus, and lung, and often evade treatment."

Her team, which included first author Naoki Oshimori, a postdoctoral research associate in the lab and lab technician Daniel Oristian, focused on squamous cell carcinomas in the skin of mice. Like many normal tissue stem cells, the stem cells that produce squamous cell tumors can be classified into two types: those that divide and proliferate rapidly, and those that do so more slowly. This has led scientists to wonder whether the more dormant stem cells in a tumor might evade cancer drugs.

To investigate this possibility, the team zeroed in on TGF- (transforming growth factor beta) which is known to restrict growth in many healthy tissues. The lab's previous research has shown that mice whose normal skin stem cells cannot respond to TGF- become susceptible to develop tumors that grow rapidly. Paradoxically, however, TGF- contributes to metastasis in many cancers. The researchers wanted to know: How can TGF- act both to suppress cancers and promote them?

By visualizing TGF- signaling within developing mouse tumors, the researchers found that the cancer stem cells located nearest to the blood vessels of the tumor receive a strong TGF- signal, while others further away don't receive any. To see this difference and its effects, they used a red tag to illuminate those cells exposed and responding to TGF-, and a green genetic tag, which they could switch on, to track the stem cells' progeny. Over time, they saw that TGF--responding stem cells proliferate more slowly but they simultaneously invade, scatter and move away from the tumor. The opposite was true of cancer stem cells too far away to receive TGF-, which proliferated rapidly, but were less invasive, growing as a tumor mass.

"We tested the implications for drug resistance by injecting cisplatin, a commonly used chemotherapy drug for these types of cancers, into the mice with tumors. While the drug killed off most of the TGF- nonresponding cancer cells, it left behind many of the responders," Oshimori says. "When the drug was withdrawn, the lingering TGF- responding cancer stem cells grew back the tumor."

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Growth signal can influence cancer cells' vulnerability to drugs, study suggests

While well known for its unique electromechanical properties, graphene may also prove key in preventing cancer tumor recurrence. A drawback of traditional cancer treatment with radiation and chemotherapy is that the primary developmental source of future tumors is not eradicated. Cancer stem cells, or CSCs, can survive treatment and give rise to recurring tumors, metatasis, and drug resistance after repeated treatments. Researchers from the University of Manchester and the University of Calabria have discovered that graphene oxides targets and neutralize CSCs in a manner that is not yet fully understood.

One CSC can develop into a ball of new CSCs called a tumor-sphere, or into new tumor cells, such as what happens in metastasis. They're immortal, divide rapidly, and resist stress. A potential solution? Graphene oxide, GO, which is an oxidized form of its well-known carbon cousin and soluble in many solvents.

For a complete look at the efficacy of GO across cancers, researchers used CSCs from six types of cancer: breast, pancreatic, lung, brain, ovarian and prostate. They also used normal skin cells to confirm that GO would not be toxic to the body.

After cells were treated for 48 hours with a GO solution, the researchers found that not only did GO interrupt the ability of CSCs in all cancer types to proliferate by forming spheres, but that GO was safe to the skin cells.

Dr Aravind Vijayaraghavan of the National Graphene Institute at the University of Manchester says that GO seems to force the cancer stem cells to differentiate into non-cancer stem cells. In this way, GO effectively takes the CSC out of commission for creating future tumors. Currently the theory is that GO interferes with the signalling pathways in the cell membranes, curbing the proliferation mechanism.

Interestingly, this graphene derivative had already been researched for as a targeted delivery vehicle in tumors, but has now been found to have an important effect itself on the tumor.

While the researchers acknowledge that the mechanisms at play need to be researched more before the material can be used to treat cancers, the ability to destroy cancer stem cells is an an important component of a cancer treatment protocol that kills existing tumors as well as shuts down future metatasis.

Vijayaraghavan and the Graphene Institute have previously made headlines as a recipient of research money from the Bill and Melinda Gates Foundation towards the development of a better condom. Their proposal, of course, used graphene.

The team's research was originally published in Oncotarget on February 24, 2015.

Source: University of Manchester

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Graphene derivative interferes with seemingly invincible cancer stem cells

February 25, 2015

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Chuck Bednar for redOrbit.com @BednarChuck

Scientists from the UK and Israel have demonstrated for the first time that it is possible to make human egg and sperm cells using skin from two adults of the same sex a breakthrough that may make it possible for same-sex couples to have children with shared DNA.

The research, which was funded by the Wellcome Trust, was completed at Cambridge University with the assistance of experts from the Weizmann Institute of Science, Cambridge News reported on Monday. They were able to use stem cell lines from embryos and from five different adults (a total of 10 different donor sources) to successfully create germ-cell lines.

According to CBS Atlanta, the experiment had previously been successful in creating live baby mice, but this new study marks the first time in which engineered human cells were found to be an identical match to aborted fetuses. It also marks the first time that human stem and skin cells were combined to form entirely new germ-cell lines.

[STORY: FDA reconsidering ban on homosexual, bisexual blood donors]

We have succeeded in the first and most important step of this process, which is to show we can make these very early human stem cells in a dish, Azim Surani, project leader at the Wellcome Trust and a professor of physiology and reproduction at Cambridge, told The Sunday Times.

Hope for those who cant conceive

The key to the process was SOX17, a master gene which typically works to direct stem cells to form whatever type of tissue or organ is required. Their new process works by manipulating this gene so that it becomes part of a primordial germ cell specification (causing it to create cells that will form an entire person), making it possible to create primordial germ cells in the lab.

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Sperm and egg created from skin cells of two same sex adults

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A stem cell research breakthrough might someday allow same-sex couples to have their own biological children.

Researchers at Cambridge University in England have taken the first steps towards creating artificial sperm and eggs by reprogramming skin cells from adults and converting them into embryonic-like stem cells. The team then compared the engineered stem cells with human cells from fetuses to confirm they were in fact, identical.

The researchers published their findings in the journal Cell earlier this week, stressing that its early days for this type of research.

We have succeeded in the first and most important step of the process, Dr. Jacob Hanna, an investigator with the Weizmann Institute of Science in Israel, told ABC News.

Hanna said the team will now attempt to complete the process by creating fully developed artificial sperm and eggs, either in a dish or by implanting them in a rodent. Once this is achieved, the technique could become useful for any individual with fertility problems, he said, including couples of the same sex.

"It has already caused interest from gay groups because of the possibility of making egg and sperm cells from parents of the same sex," Hanna said.

However, the prospect of creating a baby by these artificial means alone is probably a long way off, Hanna said.

It is really important to emphasize that while this scenario might be technically possible and feasible, it is remote at this stage and many challenges need to be overcome, he said. Further, there are very serious ethical and safety issues to be considered when and if such scenarios become considered in the distant future.

The research was funded by the Wellcome Trust and the Britain Israel Research and Academic Exchange Partnership.

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The Reason Same-Sex Couples May One Day Have Biological Kids

Researchers from Cambridge University and Israels Weizmann Institute of Science are claiming a stem cell research breakthrough that would allow a baby to be created from the skin cells from two adults, no matter their gender. This potentially allows for infertile couples to have their own children without resorting to sperm or egg donors, and may provide the means for same sex couples to produce their own babies.

Previously only successful in experiments on mice, the new research has been conducted on human cells for the first time. In this study, the researchers paired stem cell lines from embryos with the skin of a range of different adults, with the resultant cells compared to aborted fetuses to determine an identical match.

Techniques devised to create same-sex offspring are not new. Some experiments involve the manipulation of fibroblasts in mice resulting in offspring with the genetic traits of multiple male mice, whilst others have used bone marrow stem cells extracted from males to trigger spermatogonia.

However, in this latest research, stem cells and adult human skin have been combined for the first time to create an entire new germ-cell line (that is, cells that will become embryos). Derived from ten different donor sources, the new germ-cell lines were created from 10 different donor sources five embryos and five adults.

Intrinsic to this pairing was the SOX17 gene. A master gene, SOX17 usually works to direct stem cells to be programmed to become whatever organs or body parts are required in other research this techniques has been used to create lung, gut, and pancreas cells.

The manipulation of the gene to be part of a primordial germ cell specification (that is, direct it to create cells that will become an entire human), however, is a new development pioneered by the team and has allowed them to follow this discovery with actually making primordial germ cells in the lab. This stage in a babys development is known as "specification", and once primordial germ cells become specified, they continue to develop inexorably toward precursor sperm or ova cells.

Creating human egg and sperm cells from the skin of two adults of the same gender immediately raises the possibility of same sex couples procreating and offering an alternate pregnancy path for infertile couples. Of course, it also opens the door to a new minefield of ethical and moral implications, but the researchers note that many people may potentially benefit from the technique.

The results of the research were published in the online journal Cell.

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Stem cell breakthrough may allow same gender couples to create babies

A scientific breakthrough gets gay groups all excited about the possibility of creating egg and sperm cells from parents of the same sex.

CAMBRIDGE: Scientists at the University of Cambridge in collaboration with the Weitzmann Institute in Israel successfully used skin from five adults to artificially create germ cells or stem cells, responsible for making sperm and eggs in the body.

According to The Daily Mail UK, Jacob Hanna, the specialist leading the projects Israeli arm claimed that the technique could be developed to create a baby, in just two years time.

They also reported Cambridge Universitys Professor Azim Surani as saying:We have succeeded in the first and most important step of this process, which is to show we can make these very early human stem cells in a dish.

The Daily Nation, however, explained that what the Cambridge researchers did was identify the gene which determined which cells would become sperm and egg, and harvested them by culturing them with human embryonic stem cells, for five days.

When an egg is fertilised by a sperm, they develop into foetus or the placenta. Some become stem cells, while others become germ cells and subsequently sperm and eggs. But this isnt the same as artificial sperm and eggs.

For now, Surani said the process would contribute to scientists understanding human genetics and diseases related to aging, as they discovered that one of the occurrences in germ cells included epigenetic mutations, where cell mistakes that occur with age, were wiped out so the cell is regenerated and reset.

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Scientists claim they can create babies for gay couples

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Researchers from Cambridge University have shown for the first time that it is possible to make human egg and sperm cells using skin from two adults of the same sex.

The scientific breakthrough may lead to a baby being made in a dish from the skin cells of two adults of the same sex, bringing hope to gay people.

The project, funded by the Wellcome Trust, was achieved at Cambridge University with Israels Weizmann Institute of Science.

The scientists used stem cell lines from embryos as well as from the skin of five different adults.

Ten different donor sources have been used so far and new germ-cell lines have been created from all of them, researchers said.

A gene called SOX1 has turned out to be critical in the process of reprogramming human cells, according to a report in a national newspaper.

The details of the technique were published in the journal Cell.

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Cambridge university researchers' breakthrough paves way for same sex couple babies

NEW YORK (Thomson Reuters Foundation) - Human stem cells engineered to produce renewable sources of mature, liver-like cells can be grown and infected with malaria to test potentially life-saving new drugs, according to researchers at the Massachusetts Institute of Technology.

The advance comes at a time when the parasitic mosquito-borne disease, which kills nearly 600,000 people every year, is showing increased resistance to current treatment, especially in Southeast Asia, according to the World Health Organization.

The liver-like cells, or hepatocytes, in the MIT study were manufactured from stem cells derived from donated skin and blood samples.

The resulting cells provide a potentially replenishable platform for testing drugs that target the early stage of malaria, when parasites may linger and multiply in the liver for weeks before spreading into the bloodstream.

Sangeeta Bhatia, a biomedical engineer and senior author of the MIT report, told the Thomson Reuters Foundation that the breakthrough study not only showed that these liver-like cells could host a malaria infection but also described a way to mature the young cells so that an adult-like metabolism, necessary for drug development, could be established.

The study is published in the Feb. 5 online issue of Stem Cell Reports.

Stem cells retain the genetic makeup of their donors, affording researchers the potential to test drugs against a large variety of genetic types and a variety of diseases.

"This allows us to explore in depth how different diseases affect different people, in this case malaria," Bob Palay, chairman and CEO of Cellular Dynamics International (CDI), told the Thomson Reuters Foundation.

"This allows you to study it in a dish and find new drugs," he added, noting that CDI uses blood samples for its stem cells.

Before this development, researchers tested new drugs using human liver cells from cadavers and cancerous liver cells.

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Stem cells offer promising key to new malaria drugs: US research

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The Body Shop introduces its Drops of Youth, Red Musk Fragrance, and Limited-Edition Forbidden Flower collections.

Drops of Youth, made from edelweiss flower stem cells sourced from the Alps, replenishes your skin in the most natural way. Left on overnight, the lightweight mask is like a second skin. In the morning, skin feels smooth and hydrated, and looks younger and fresher.

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The Limited-Edition Forbidden Flower Collection is a body care and fragrance line inspired by the poppy flower.

DROPS of YouthWonderblur is a skin smoother that reduce fine lines and pores for an even, flawless finish.

Known for its thrust in protecting the planet, The Body Shop never tests its products on animals. The line has a Community Fair Trade program, where high-quality natural ingredients are sourced in different parts of the world where small stakeholders and artisans can benefit.

The Drops of Youth and Red Musk collections are available at The Body Shop stores nationwide, while Forbidden Flower Collection is available at selected The Body Shop branches. SM Advantage Card members can now earn and redeem points in all The Body Shop stores.

THE RED Musk Fragrance Collection. I wanted to create a fragrance that wasnt the typical girly girl scent. I wanted to change the rules of fragrance. Instead, I used the sensuality and the warmth of spices blended withmusk to approach femininity differently, says Corinne Cachen, master perfumer.

FORBIDDEN Flower Body Butter gives your skin the pleasure of pure potent moisture.

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Theres a lot to love at The Body Shop

For patients with brain cancer, radiation is a powerful and potentially life-saving treatment, but it can also cause considerable and even permanent injury to the brain. Now, through preclinical experiments conducted in rats, Memorial Sloan Kettering Cancer Center researchers have developed a method to turn human stem cells into cells that are instructed to repair damage in the brain. Rats treated with the human cells regained cognitive and motor functions that were lost after brain irradiation. The findings are reported in the February 5 issue of the journal Cell Stem Cell.

During radiation therapy for brain cancer, progenitor cells that later mature to produce the protective myelin coating around neurons are lost or significantly depleted, and there is no treatment available to restore them. These myelinating cells--called oligodendrocytes--are critical for shielding and repairing the brain's neurons throughout life.

A team led by neurosurgeon Viviane Tabar, MD, and research associate Jinghua Piao, PhD, of the Memorial Sloan Kettering Cancer Center in New York City, wondered whether stem cells could be coaxed to replace these lost oligodendrocyte progenitor cells. They found that this could be achieved by growing stem cells--either human embryonic stem cells or induced pluripotent stem cells derived from skin biopsies--in the presence of certain growth factors and other molecules.

Next, the investigators used the lab-grown oligodentrocyte progenitor cells to treat rats that had been exposed to brain irradiation. When the cells were injected into certain regions of the brain, brain repair was evident, and rats regained the cognitive and motor skills that they had lost due to radiation exposure. The treatment also appeared to be safe: none of the animals developed tumors or inappropriate cell types in the brain.

"Being able to repair radiation damage could imply two important things: improving the quality of life of survivors and potentially expanding the therapeutic window of radiation," said Dr. Tabar. "This will have to be proven further, but if we can repair the brain effectively, we could be bolder with our radiation dosing, within limits." This could be especially important in children, for whom physicians deliberately deliver lower radiation doses.

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The above story is based on materials provided by Cell Press. Note: Materials may be edited for content and length.

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Human stem cells repair damage caused by radiation therapy for brain cancer in rats

The Hormel Institute has announced Rebecca Morris, leader of the Stem Cells and Cancer research section, has received a one-year, $100,000 grant from the Minnesota Chemoprevention Consortium to study bone marrow-derived cells as potential new targets for preventing skin cancer.

The consortium includes the University of Minnesota's Hormel Institute, Mayo Clinic, the U of M's Masonic Cancer Center and Hormel Foods Consortium. The consortium goes by the moniker "MC^2."

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TORONTO Two Canadian research centres are gearing up for a clinical trial to determine if a type of stem cell can help alleviate the symptoms of multiple sclerosis.

Researchers at the Ottawa Hospital and Winnipegs Health Sciences Centre will each recruit 20 MS patients for the trial that will test whether mesenchymal stem cells can reduce inflammation and even help repair damage already caused by the disease.

MS is thought to be an autoimmune disease that creates inflammation in the central nervous system, resulting in injury to myelin, the protective sheath that covers nerves. This damage can create a host of symptoms, leading to varying degrees of physical disability and cognitive impairment.

Mesenchymal stem cells, which are found in bone marrow, fat, skin tissue and umbilical cord blood, have the ability to modify the immune system and reduce inflammation, said neurologist Dr. Mark Freedman of the Ottawa Hospital Research Institute, who is leading the clinical trial.

Freedman said researchers want to determine if these stem cells can demonstrate anti-inflammatory properties in patients with MS.

But thats not why were doing it, he said of the study, called MESCAMS (MEsenchymal Stem cell therapy for CAnadian MS patients). We have lots of drugs that can control inflammation in multiple sclerosis thats what all the new medicines do.

The ultimate hope is that we will be able to exploit some of their other very important biological properties, which is to promote repair.

The two research centres are ready to begin enrolling patients for the trial, which has specific acceptance criteria. While most of those accepted will likely have the relapsing-remitting form of the disease, Freedman said some people with more severe primary- or secondary-progressive MS may also be eligible if they fit the criteria.

The study protocol can be accessed at http://www.clinicaltrials.gov/show/NCT02239393. It will later be posted on the website of the MS Society of Canada, which along with the Multiple Sclerosis Scientific Research Foundation has provided a $4.2-million grant for the study.

To conduct the trial, half the patients will be randomly assigned to receive their own mesenchymal stem cells within weeks of them being extracted from the bone marrow and grown in the lab; the remainder of the participants will instead be infused with a mock stem-cell solution, and wont receive their actual stem cells for about six months. The two groups will then be compared.

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Trial to test stem cells in MS patients