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Tag: "stem" at biology news

Long-term cancer risk follows stem cell transplant recipients

Hematopoietic stem cell transplant (HSCT) recipients face a significa...y were older at the time of transplant or received stem cells from a female donor, according to a new study. Published in the January 1, 2007 issue of CANCE...

How does a zebrafish grow a new tail?

...dy have a given function or by activating resident stem cells." Developmental biologists know that a pa... be reproduced. These streams of signals also tell stem cells in adult organisms what functions to undertake. Once tissue formation starts, something has to...

Signaling for cartilage

... that are differentiated from the same multipotent stem cell, said Dr. Brendan Lee, associate professor of...d Hughes Medical Institute investigator. This same stem cell gives rise to bone, cartilage, fat and fibroblasts. “The big question is what are the master...

MIT creates 3-D scaffold for growing stem cells

... were able to grow a healthy colony of adult mouse stem cells on the three-dimensional scaffold without th...tive motifs, the scaffold can be fashioned to coax stem cells to behave in certain desirable ways-such as differentiating into needed body tissues or migrat...

Fat stem cells being studied as option for breast reconstruction

...g instead for an approach that would involve using stem cells derived from their own fat, suggest Universi...ers hope to prove that an injection of fat-derived stem cells that are seeded onto microscopic scaffold structures will enable the production of a durable, ...

Striking the right balance between excitation and inhibition

...nown to regulate maturation of neurons from neural stem cells, has a reciprocal function in precursors of inhibitory and excitatory neurons: cells with high levels of activated Notch became excitatory neurons, while cells with low levels of Notch became inhibitory. Interestingly, the researchers found t...

Stem cell expansion

Transplantation of hematopoietic stem cells (HSCs, the cells that can give rise to all b...ne, expression of a gene called HOXB4 can instruct stem cells to divide and make more stem cells. When the researchers tested those expanded cell population...

Tamed 11,400 years ago, figs were likely first domesticated crop

...ion." Figs are very easily propagated: A piece of stem stuck in the ground will sprout roots and grow into a plant. No grafting or seeds are necessary. Bar-Yosef, Kislev, and Hartmann suggest that this ease of planting, along with improved taste resulting from minor mutations, may explain why figs were d...

Study provides first look at the 'birth' of a retina cell

...nes. As the mouse eye develops, rods start out as stem cells, meaning they have not yet been assigned a function and could theoretically grow to become any kind of cell. Along the way, these cells change their gene expression and acquire competence to become a specific cell type. At a certain point, cell...

Knowledge of dendritic cells branches out

...hat DC, like other white blood cells, develop from stem cells in the bone marrow. Exactly how that process happens has been a mystery ?until now. Using a mouse model, PhD student Shalin Naik, group leader Professor Ken Shortman and a team of colleagues at The Walter and Eliza Hall Institute have discovere...

UCLA researchers develop T-cells from human embryonic stem cells

...monstrated for the first time that human embryonic stem cells can be genetically manipulated and coaxed to...und that it is possible to convert human embryonic stem cells into blood-forming stem cells that in turn can differentiate into the helper T-cells that HIV ...

A surprise about our body clock

...the critically important role of bone marrow adult stem cells in repairing a damaged heart, restoring its ...d heart. By binding to another molecule called the stem cell factor ?much like a lock and key -- the "turned on" c-kit activates the bone marrow cells to m...

OHSU study says stem cell 'fusion' occurs in tumors

...reasingly popular theory that fusion is what bonds stem cells with bone marrow cells to regenerate organ t...ed from adult bone marrow can fuse with intestinal stem cells of both normal and diseased tissue comprising the cellular lining of intestinal walls, known a...

Healing the heart with bone marrow cells

...the critically important role of bone marrow adult stem cells in repairing a damaged heart, restoring its ...d heart. By binding to another molecule called the stem cell factor ?much like a lock and key -- the "turned on" c-kit activates the bone marrow cells to m...

Origen publishes in Nature a robust and versatile method for creating transgenic chickens

...ryonic germ cells that look and act like embryonic stem cells. The chicken is the first species from which... "Beyond that, it will help researchers understand stem cell biology and development --something that holds great value for all sorts of basic studies. This...

Selectively blocking inflammatory signals may protect mice from MS

...s, this protective approach could be combined with stem cell therapy to repair nerve damage. Several research groups are already studying the use of stem cells to repair damaged myelin sheaths, but in the long term those stem cells would be vulnerable to...

Fertility hope as study shows eggs survive in older ovaries

...entists have suggested that the new eggs come from stem cells in the bone marrow or the ovary, we really d... the mechanism could provide direction for ovarian stem cell research and help women with fertility conditions," he said. One in six Australian couples fac...

Dopamine drug leads to new neurons and recovery of function in rat model of Parkinson's

...ansplant new neurons that are grown from embryonic stem cells or neural progenitor cells. However, this t...second possible way to restore function ?prompting stem cells that normally remain dormant in the adult brain to develop into neurons. While most researche...

Birds going extinct faster due to human activities

Embryonic stem cells, prized for their astonishing ability to app...tists report. Using an animal model of embryonic stem cell development, researchers with UF's McKnight Brain Institute have begun to answer one of the mos...

Medium is the message for stem cells in search of identities

Embryonic stem cells, prized for their astonishing ability to app...tists report. Using an animal model of embryonic stem cell development, researchers with UF's McKnight Brain Institute have begun to answer one of the mos...

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