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Tag: "stem" at biology news

Scientists discover stage at which an embryonic cell is fated to become a stem cell

...fertilised mammalian egg are fated to develop into stem cells and why this occurs. The findings of the st...f the embryo. These become the inner cell mass of stem cells. Previously, it was believed that the mammalian embryo starts its development with identical ...

New cell type identified in cancer development

...lopment of cancer ?a highly volatile, precancerous stem cell that can either remain benign or become malig...s. The finding may help define the role of cancer stem cells in the growth and recurrence of the disease as well as offer new options for cancer prevention...

Exploring the molecular origin of blood clot flexibility

...ve the right degree of stiffness and plasticity to stem the flow of blood when tissue is damaged, yet be flexible enough so that it does not block blood flow and cause heart attacks and strokes. In previous research, senior author John W. Weisel, PhD, Professor of Cell and Developmental Biology, measure...

RNA enzyme structure offers a glimpse into the origins of life

...molecule folds in such a way that parts of another stem are positioned over the ligation site, forming a p...reaction takes place. A magnesium ion bound to one stem and positioned in the pocket plays an important role in the reaction, Robertson said. The structu...

Selective marker found to indicate aggressive form of breast cancer

...hly aggressive cancer with similarities to mammary stem cells, the regenerative cells believed to be the s...estin is a long filamentous protein found in adult stem cells in the central nervous system. While scientists do not know its exact function, the protein is...

Researchers first to map gene that regulates adult stem cell growth

A new discovery in stem cell research may mean big things for cancer patie...ic journal. The researchers genetically mapped a stem cell gene and its protein product, Laxetin, and building on that effort, carried the investigation a...

Xie Lab demonstrates the role of microRNA pathway

...essential for controlling self-renewal of germline stem cells and somatic stem cells in the Drosophila ovary. The paper, "Dcr-1 Maintains Drosophila Ovarian Stem Cells," was p...

Stem cells decrease ischemic injury and restore brain function

...ous cells that, in theory, could be substituted by stem cells. A few studies have shown that these cells c...troduced in the area of the brain hit by a stroke, stem cells induce the development of a protective effect in this same area," explains De Simoni. "Therefo...

Stem cell transplants explored at Stanford as a possible treatment for hearing loss

... someday find a cure for deafness. As a leader in stem cell-based research on the inner ear at the Stanf...sooner rather than later. Heller will discuss his stem cell research during a panel discussion Feb. 17 in San Francisco at the annual meeting of the Amer...

Penn researchers replace organ in adult mice using 'single-parent' stem cells

...rinary Medicine have derived uniparental embryonic stem cells - created from a single donor's eggs or two ...e. Their findings demonstrate that single-parent stem cells can proliferate normally in an adult organ and could provide a less controversial alternative ...

Study uncovers a lethal secret of 1918 influenza virus

...le in future outbreaks of highly pathogenic flu to stem the tide of death through early intervention. The study "proves the 1918 virus was indeed different from all of the other flu viruses we know of," says Kawaoka, a professor in the UW-Madison School of Veterinary Medicine and at the University of T...

Gene study shows three distinct groups of chimpanzees

...nt in Przeworski's laboratory. "Part of that could stem from the gaps in our samples, but we think most of this separation is genuine, a long-term consequence of geographic isolation." The original boundaries between groups may have been the emergence and growth of rivers, such as the Congo River, whic...

Scientists unlock mystery of embryonic stem cell signaling pathway

...lled IQ-1 plays a key role in preventing embryonic stem cells from differentiating into one or more specif...nother step closer to being able to grow embryonic stem cells without the “feeder layer?of mouse fibroblast cells that is essential for maintaining the plur...

How to manage forests in hurricane impact zones

...ifferent situations. "Our simple simulation of stem breakage potential suggests that stand spacing and tree height can be manipulated to reduce risk, and provides a start for managing forests for hurricane risk," says Stanturf. "Additional research is needed on the effects on vulnerability of fragment...

Can engineered immune cells stop AIDS?

...orators on his project are targeting hematopoietic stem cells -- the bone marrow cells that form blood cel... sure lentiviral vectors target only hematopoietic stem cells, and not other types of cells, to achieve the desired targeted delivery. With a group of USC...

Are scientists making progress in being able to regenerate bone tissue?

...tissue. “Bone tissue engineering using bone marrow stem cells has been suggested as a promising technique for reconstructing bone defects,?say Meijer and colleagues. Bone tissue engineering has shown success in animal studies. In their article the authors review the available data on bone tissue engin...

Cells use 'noise' to make cell-fate decisions

...ight have an important function, such as prompting stem cells to transform into a specific tissue type. ...led differentiation, is akin to that used by human stem cells to change into a specific tissue type. In a series of theoretical calculations and actual ...

Stem cell identity in culture may strongly depend on the cellular microenvironment

...entification, isolation and large scale culture of stem cells for potential medical applications is a majo...al observations and computer simulations, that the stem cell identity in culture may strongly depend on the cellular microenvironment. These observations ...

Scientists produce neurons from human skin

...have succeeded in producing neurons in vitro using stem cells extracted from adult human skin. This is the...sts conducted by the researchers demonstrated that stem cells from the skin can proliferate and differentiate in vitro when placed in the appropriate enviro...

Liposuctioned fat stem cells to repair bodies

...mprove their looks. But unwanted fat also contains stem cells with the potential to repair defects and hea...o predict which, among the hundreds of millions of stem cells in liposuctioned fat, are best at regenerating tissue. Uncovering the nature and location of...

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