Experimental drug shows promise against brain, prostate cancers

An experimental drug currently being tested against breast and lung cancer shows promise in fighting the brain cancer glioblastoma and prostate cancer, researchers at UT Southwestern Medical Center have found in two preclinical studies.

The drug’s actions, observed in isolated human cells in one trial and in rodents in the other, are especially encouraging because they attacked not only the bulk of the tumor cells but also the rare cancer stem cells that are believed to be responsible for most of a cancer’s growth, said Dr. Jerry Shay, professor of cell biology and a senior co-author of both papers. The glioblastoma study appears in the January issue of Clinical Cancer Research. The prostate cancer study is available online in the International Journal of Cancer.

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First U.S. stem cells transplanted into spinal cord

For the first time in the United States, stem cells have been directly injected into the spinal cord of a patient, researchers announced Thursday.

Doctors injected stem cells from 8-week-old fetal tissue into the spine of a man in his early 60s who has advanced ALS, or amyotrophic lateral sclerosis. It was part of a clinical trial designed to determine whether it is safe to inject stem cells into the spinal cord and whether the cells themselves are safe (…)

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Vitamin C Enhances the Generation of Mouse and Human Induced Pluripotent Stem Cells

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Somatic cells can be reprogrammed into induced pluripotent stem cells (iPSCs) by defined factors. However, the low efficiency and slow kinetics of the reprogramming process have hampered progress with this technology. Here we report that a natural compound, vitamin C (Vc), enhances iPSC generation from both mouse and human somatic cells. Vc acts at least in part by alleviating cell senescence, a recently identified roadblock for reprogramming.

In addition, Vc accelerates gene expression changes and promotes the transition of pre-iPSC colonies to a fully reprogrammed state. Our results therefore highlight a straightforward method for improving the speed and efficiency of iPSC generation and provide additional insights into the mechanistic basis of the reprogramming process.► Vitamin C improves the speed and efficiency of mouse iPSC generation ► Adding vitamin C converts pre-iPSCs to iPSCs ► Vitamin C alleviates the senescence roadblock to reprogramming ► Human iPSC generation is also improved by vitamin C

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Synthetic artery developed using stem cells

A team of researchers from UCL has won a £500,000 grant to develop a synthetic artery that mimics a natural artery – and could revolutionise the treatment of coronary heart disease.

Professor Alexander Seifalian (UCL Surgery and Interventional Science) and Professor George Hamilton (UCL Surgery and Interventional Science & Royal Free Hospital) and their team will use the Wellcome Trust grant to take their work from the laboratory to a pre-clinical trial.

The team has been developing a new nanomaterial with mechanical properties similar to that of human arteries.

The nanomaterial’s inner surface has been modified to attract stem cells from blood circulating inside the body.

It converts these primary cells to endothelial cells, a type of cell that covers the interior of the natural blood vessel and protects it from blockage.

The breakthrough offers hope for sufferers of heart disease who are unable to donate suitable substitute blood vessels for bypass surgery.

Professors Seifalian and Hamilton, experts in nanotechnology, regenerative medicine and vascular surgery, explained: “Coronary heart disease is a condition where one or more blood vessels of the heart become narrowed or blocked. This causes the heart muscle to be starved of oxygen causing damage often leading to a heart attack and muscle death. This interferes with the heart’s ability to pump blood around the body, leading to infirmity and possibly death.

“The current treatment of the disease is to create a new route for blood to circulate, most often by balloon dilatation and stent (stent angioplasty). In many patients however this intervention cannot be performed and in this situation an operation called bypass surgery is needed which can either use substitute blood vessels from another part of the patient or made from a plastic material.

read more: http://www.ucl.ac.uk/news/news-articles/0908/09081101

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Launch of new MIT Portugal networks on energy, cities and stem cells

While in Lisbon, President Hockfield also participated in the launch of three new MIT Portugal research and training networks designed to advance new knowledge in sustainable energy systems and electric mobility, the greening of cities, and stem cell engineering. (These areas are central to MIT Portugal’s research efforts.) MITEI is a partner in the first two networks, and the Initiative’s Director Prof. Ernest Moniz also spoke at the forums at which they were announced.

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