niche

Priming embryonic stem cells to fulfill their promise

...hat this extracellular matrix partof the stem cell niche has been understudied. If we can now take whatwe've learned, add combinations of growth factors, and even add othercells to embryonic stem cells, we may be able for the first time tostudy all the dimensions of the niches required to very specifically...

Study reveals new technique for fingerprinting environmental samples

...e indicators capture a DNA profile of a particular niche and reflect the presence and levels of nutrients, ...fingerprints capture a DNA profile of a particular niche and reflect the presence and levels of nutrients, and pollutants, as well as features like the light...

The evolutionary triumph of flower power

...hers went on to develop the evolutionary emotional niche model. In the first study, flowers were tested against other gift stimuli, such as a fruit and sweets basket and a large decorative candle. Of the 147 women tested, all those who received flowers responded with a smile; however, there were no smiles...

Young Blood Revives Aging Muscles, Stanford Researchers Find

...er. "We need to consider the possibility that the niche in which stem cells sit is as important in terms of stem cell aging as the cells themselves," said Rando, who is also an investigator at the Veterans Affairs Palo Alto Health Care System. It could be the chemical soup surrounding the cells, not the c...

New book explains antibiotic resistance for a broad audience

...n that motivated us to come out of our comfortable niche as writers of textbooks and attempt to write a book for the general public about antibiotics and resistance to them." Revenge of the Microbes provides the scientific information readers will need to form opinions and make informed decisions regardin...

Map of life on Earth could be used on Mars

.... Blank can then use chronological data to analyze niche specialization, "where these organisms like to grow," among members of each life domain over geologic time. Habitat divergence among bacteria is consistent with patterns of divergence among the other prokaryotes, Blank's research shows. She notes a ...

Immune system's distress signal tells bacteria when to strike back

...ory: that "bacteria are perfectly content in their niche until signals from the host ?usually during stress, such as after major surgery ?let them know there's a problem." For Pseudomonas, detecting interferon-gamma, "is like receiving a demolition notice from your landlord," Alverdy said. "It lets them k...

Say what? Bacterial conversation stoppers

...g chemical communication. You can imagine that, in niche one, the bacteria we consider good guys might be using AI-2 and winning. And unfortunately, in niche two, the bad guys might be using AI-2 and winning." ...

Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds

...devil's gardens by ants is an excellent example of niche construction," Frederickson says. "By killing plants of other species, the ant promotes the growth and establishment of D. hirsuta, thereby gaining more nest sites." The plants also benefit by increasing their biomass and eliminating the competition...

Drugs from the deep blue

... "They're really fascinating little jewels made by niche creatures." As well as being largely unexplored, the chemistry of these marine organisms is very different than that of land plants and animals, reflecting both a different environment and millions of years of separate evolution. That should make it...

Bioengineers create stable networks of blood vessels

...is expands our understanding of the neuro-vascular niche and opens up ways to address repair of severed nerves," said Joseph Madri professor of pathology at Yale School of Medicine and a co-author. "We can now study what affects the attraction and repulsion of nerve growth and drug delivery in a model syst...

Ancient fossil DNA found preserved in crystal

...ion. The crystal aggregates act as a "privileged niche in fossil bone," protecting the DNA from hostile environments and leaving it relatively undamaged over time. The team's findings suggest that the DNA in these aggregates should be preferred, whenever possible, over DNA from untreated bone. This meth...

Bones hold the key to blood renewal

..., they also break up 'nurturing' substances in the niche that attract and hold the stem cells to that spot, thus allowing more stem cells into the bloodstream. The team carried out their research on mice, including some developed in the lab of Prof. Ari Elson of the Molecular Genetics Department, in whi...

Bacteria can help predict ocean change

...e long endorsed the concept of a unique biological niche for most animals and plants ?a shark, for example, has a different role than a dolphin. Bacteria instead have been relegated to an also-ran world of "functional redundancy" in which few species are considered unique, said Jed Fuhrman, holder of the...

Medium is the message for stem cells in search of identities

...g. Previous studies have shown that factors in the niche are important for stem cell proliferation. Less st...atrix affect the fate of these cells. It seems the niche doesn't just support these cells, it tells them what to become. It educates stem cells for a bright ...

Birds going extinct faster due to human activities

...g. Previous studies have shown that factors in the niche are important for stem cell proliferation. Less st...atrix affect the fate of these cells. It seems the niche doesn't just support these cells, it tells them what to become. It educates stem cells for a bright ...

Male circumcision reduces HIV risk, study stopped early

...nger is that unqualified practitioners will fill a niche by providing circumcision, but with much higher complication rates." An estimated 30 million people in Africa are infected with HIV/AIDS and more than 90 percent of HIV infections in adults result from heterosexual intercourse. In Kisumu, the thir...

New findings could lead to vaccine for severe malaria

...ent set of receptors. This means that a new growth niche is made available to a subpopulation of the parasites. Earlier studies have suggested that each protein from the parasite attaches to only one specific protein, a receptor, in the placenta. Ms Rasti and her colleagues suspected, however, that the na...

Stem cells engage in dialogue with the cells that regulate their futures

...the body. For example, if cell multiplication in a niche gets out of hand, cancer might form. A decline in ...ls to do their job. Signaling between cells in the niche plays a role in stem-cell upkeep and development. Most research has focused on the signaling of nich...

Key to zebrafish heart regeneration uncovered

...p provide new blood vessels, creating a protective niche where the new heart muscle can grow." The researchers found that biochemical signaling between the blastema and the epicardium is controlled in part by proteins called fibroblast growth factors, which are involved in wound healing and embryonic de...

Chimpanzees found to use tools to hunt mammalian prey

...ing the spear-like tools appear to be exploiting a niche relatively ignored by males, an observation that supports a previous hypothesis that female hominids played a role in the evolution of the earliest tool technology and suggests that this technology may have included tools for hunting. ...

Leukemic cells find safe haven in bone marrow

...hymal cells in the bone marrow create a protective niche for leukemic cells by releasing large amounts of a...resist asparaginase and survive in this protective niche of the bone marrow might be the reason that leukemia recurs in some children who have been treated w...

Bats prey on nocturnally migrating songbirds

...ning of rustling noises. The unique ecological niche of the giant noctule may in turn explain some of its peculiar natural history traits. First, the species occurs almost exclusively in some restricted parts of the Mediterranean where major streams of migrating birds congregate. Second, it is among t...

Darwin's famous finches and Venter's marine microbes

...in-like kinases were considered to be some sort of niche players, but actually they are more prevalent and widespread than histidine kinases," explains Manning. Bacteria were thought to rely mostly on histidine kinases, which are structurally different from protein kinases, for all their signaling needs. ...

3-D ultrasound scanner provides in-depth view of the brain

... the body. "Wherever there is a commercial 2-D niche now, we are working to put a 3-D tool in there," Smith said. ...