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Scientists' understanding of brain plasticity , or the ability of the brain to grow, develop, recover from injuries and adapt to changing conditions throughout our lives, has been greatly broadened in recent years. Before the discoveries of the last few decades, neurologists once thought that the brain became 'static' after childhood. This dogma has changed, with researchers finding more and more evidence that the brain is capable of healing and regenerating in adulthood, thanks to the presence of stem cells. However, neuronal stem cells were generally believed to only reside within the brain tissue, not in the membranes surrounding it. The meninges: unappreciated no more: Believed in the past to serve a mainly protective function to dampen mechanical shocks, the meninges have been historically underappreciated by science as having neurological importance in its own right. The data gathered by the team challenges the current idea that neural precursors -- or stem cells ...

Shade-labeling blood stem cells permits HSCI researchers to trace how they reply to transplantation or stress. Credit score: Vionne Yu, Scadden Lab. Harvard Stem Cell Institute (HSCI) researchers have used a colourful, cell-labeling method to trace the event of the blood system and hint the lineage of grownup blood cells travelling by the huge networks of veins, arteries, and capillaries again to their dad or mum stem cell within the marrow. Their findings have already superior the understanding of blood improvement in addition to blood illnesses. Developed at Harvard's Middle for Mind Science, the method entails coding a number of colours of florescent protein right into a cell's DNA. As genes recombine contained in the cell, the cell elaborates a colour distinctive to its genetic code. For blood stem cells, that colour turns into a genetic signature handed right down t...

Mechanism of unfavorable results brought on by G-CSF. Credit score: Picture courtesy of Kobe College A group of Japanese researchers revealed the mechanism for negative effects similar to fever and bone ache brought on by G-CSF, which is extensively used for peripheral blood hematopoietic stem cell harvesting (PBSCH). This is a vital methodology for hematopoietic stem cell transplantation (HSCT) used to deal with hematological malignancies similar to leukemia. G-CSF is important for remedy of hematological malignancies and different varieties of cancers, however the mechanism for its unfavorable negative effects has not been elucidated till now. The findings from this analysis revealed not solely the mechanism of the unfavorable results of G-CSF, but in addition a brand new operate of neutrophils, a sort of blood cell which was beforehand acknowledged simply as a shopper of invadi...

Every stem cell researcher knows the protein Nanog because it ensures that these all-rounders continue to renew. A controversial debate revolved around how the quantity of Nanog protein in the cell is regulated. "So far it was often assumed that Nanog activates itself in order to preserve the pluripotency in embryonic stem cells," explains Dr. Carsten Marr. He heads the Quantitative Single Cell Dynamics research group at the Institute of Computational Biology (ICB) of the Helmholtz Zentrum München. Together with colleagues from ETH Zürich, he and his team have developed an algorithm called STILT (Stochastic Inference on Lineage Trees) that now rebuts this assumption. Using STILT, the scientists evaluated time -resolved protein expression data (already collected in 2015) from individual cells in which Nanog could be detected through fusion with a fluorescence protein. "We compared the Nanog dynamics that were measured in this way with three different models. One of t...

The survival of an organism is linked to its ability to maintain the quality of the cellular proteins. A group of proteins called chaperones facilitate the folding of proteins and are essential to regulating the quality of the cellular protein content. This ability declines during the aging process, inducing the accumulation of damaged and misfolded proteins that can lead to cell death or malfunction. Several neurodegenerative age-related disorders such as Alzheimer's, Parkinson's or Huntington's diseas e are linked to a decline in protein quality control. Human pluripotent stem cells can replicate indefinitely while maintaining their undifferentiated state and, therefore, are immortal in culture. This capacity necessarily demands avoidance of any imbalance in the integrity of their protein content. "There is one chaperone system, the TRiC/CCT-complex that is responsible for folding about 10% of all the cellular proteins. By studying how pluripotent stem cells mai...

The researchers will present their findings at this week's 58th Annual American Society of Hematology Meeting and Exposition in San Diego. Clostridium difficile infection, more commonly known as C. diff, causes diarrhea and can lead to severe inflammation of the bowel. These infections can be not only extremely uncomfortable, but can lead to other severe medical complications. Even with a course of antibiotics, the infection can lead to longer hospital stays and increased treatment cost. A study published last year in the American Journal of Gastroenterology found the average cost of C. diff ranges from $8,911 to $30,049 per patient. Oral vancomycin is a standard antibiotic used to treat C. diff, and researchers at the Abramson Cancer Center began giving it to patients on a preventative basis -- twice daily from the day of admission to the day of discharge. Their study focused on patients with blood cancers undergoing an allogeneic stem cell transplant -- in which patients r...

The researchers are hopeful that their findings could one day be used to help keep muscles supple during normal aging and to treat people with diseases like muscular dystrophy. "Fibrosis occurs in many degenerative diseases and also in normal aging," said Thomas Rando, MD, PhD, a professor of neurology and neurological sciences. "It negatively impacts muscle regeneration by altering the stem cell niche and inhibiting the stem cell function. In addition, as more scarring occurs, muscles become stiff and can't contract and relax smoothly." Rando, who is the director of Stanford's Glenn Center for the Biology of Aging, is the senior author of the study, which will be published online Nov. 28 in  Nature . Former graduate student Alisa Mueller, MD, PhD, is the lead author. Self-policing stem cells The researchers discovered that stem cells embedded in muscle fibers do some fancy gene-expression footwork in order to respond appropriately to injury, dis...

Two complementary methods were developed. sOPiTKO is a knock-out system that turns off genes by disrupting the DNA. sOPTiKD is a knock-down system that silences the action of genes by disrupting the RNA. Using these two methods, scientists can inducibly turn off or silence genes, in any cell type, at any stage of a cell's development from stem cell to fully differentiated adult cell. These systems will allow researchers world wide to rapidly and accurately explore the changing role of genes as the cells develop into tissues such as liver, skin or heart, and discover how this contributes to health and disease. The body contains approximately 37 trillion cells, yet the human genome only contains roughly 20,000 genes. So, to produce every tissue and cell type in the body, different combinations of genes must operate at different moments in the development of an organ or tissue. Being able to turn off genes at specific moments in a cell's development allows their changing ro...

A re-activation of embryonic genes causes muscle ageing, scientists say. Credit score: © airdone / Fotolia The event of the embryo throughout being pregnant is among the most complicated processes in life. Genes are strongly activated, and developmental pathways should do their job in a extremely correct and exactly timed method. So-called Hox-genes play an vital regulatory function on this course of. Though remaining detectable in stem cells of grownup tissues all through life, after delivery they're solely not often lively,. Now, nevertheless, researchers from the Leibniz Institute on Growing old -- Fritz Lipmann Institute (FLI) in Jena, Germany have proven that, in previous age, one in every of these Hox-genes (Hoxa9) is strongly re-activated in murine muscle stem cells after damage; resulting in a decline within the regenerative capability of skeletal muscle. Curiously, when ...

"Each of our cells -- the fundamental units of life -- are like a city, with people and resources that move around and factories that generate those resources and carry out important functions," says Rick Horwitz, Ph.D., Executive Director of the Allen Institute for Cell Science. "With these cell lines, we aim to give the cell science community a kind of live traffic map to see when and where the parts of the cell are with the clarity and consistency they need to make progress toward understanding human health and tackling disease. Scientists at the Allen Institute for Cell Science used CRISPR/Cas9 technology to insert fluorescent tags for major cellular structures into human induced pluripotent stem cells. Unlike typical methods which flood the cell with fluorescent protein, these highly precise tags show exactly when and where the structures are at various stages in the cell's lifecycle. "By lowering the barrier to entry fo r cell biologists wi shing to...