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Tag: "mature" at biology news

Measuring hidden parasites in falciparum malaria

...ing that sequestration of red cells containing the mature forms of the parasite is the most important pathological process in falciparum malaria. Approximately 40% of the world's population, mostly living in the world's poorest countries, is at risk of malaria. In the tropical and subtropical regions of t...

'Jumping genes' contribute to the uniqueness of individual brains

...ds. Precursor cells in the embryonic brain, which mature into neurons, look and act more or less the same. Yet, these precursors ultimately give rise to a panoply of nerve cells that are enormously diverse in form and function and together form the brain. Identifying the mechanisms that lead to this divers...

Researchers devise new technique for creating human stem cells

...ry, researchers can induce embryonic stem cells to mature into a variety of specialized cells. For that reas...s," said Eggan. "We found they could be induced to mature into nerve cells, hair follicles, muscle cells and gut endoderm cells. And, since these cell types a...

For first time, brain cells generated in a dish

...alled the subventricular zone. The primitive cells mature along the way, finishing as neurons in a spot called the olfactory bulb. In the laboratory cultures, the cells still move about, but the pathway is no longer important, showing that neurogenesis does not necessarily require the environmental cues of...

Brain size may depend upon how neural cells are cleaved

... neurogenesis, vertical cleavage gives rise to two mature neurons that are incapable of further division, while horizontal cleavage yields one neuron and one progenitor cell that can continue to support brain growth. The researchers speculate that this type of regulatory decision point may play a powerful ...

UIC developing drug for SARS

...ndividual proteins, the parts needed to assemble a mature virus. These two proteases -- called 3CLpro and PLpro -- are UIC's targets for drug therapy. "If we can block 3CLpro and probably PLpro, then we can stop the SARS virus from replicating," Johnson said. Under the grant, Andrew Mesecar, associate pr...

Researchers find molecule that inhibits regrowth of spinal nerve cells

...pellent during embryonic development, doing in the mature system? "To our surprise, we found that ephrin-B3...de their formation," he said. "We also need to get mature neurons to be better at growing, similar to the way they do during embryonic development. And finall...

Scientists find a maturity gene in fly

...is crucial for determining when juveniles begin to mature into adults, and how the transformation initially ...tion into smelly, hairy, sometimes surly, sexually mature teenagers," he adds. "How is this event timed, and how is it controlled at a molecular [genetic] lev...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...is crucial for determining when juveniles begin to mature into adults, and how the transformation initially ...tion into smelly, hairy, sometimes surly, sexually mature teenagers," he adds. "How is this event timed, and how is it controlled at a molecular [genetic] lev...

Tiny roundworm's telomeres help scientists to tease apart different types of aging

...sons. Several types of cells in our body, such as mature nerve cells in the brain, oocytes, skeletal and heart muscle cells don't actively divide but stay put just like the cells in adult worms. "That makes our findings relevant for age-related decline in mental function and neurodegenerative diseases, su...

OHSU researchers discover potential mechanism to repair brain damage linked to Multiple Sclerosis

...ors. These precursor cells give rise to all of the mature oligodendrocytes that make myelin throughout life. Back's lab provided the team with tissue cultures of immature rat oligodendrocytes. The researchers then applied HA to these cells which indeed kept the immature cells from maturing into myelin-prod...

Molecular Partners Required For Appropriate Neuronal Gene Repression

...ors. These precursor cells give rise to all of the mature oligodendrocytes that make myelin throughout life. Back's lab provided the team with tissue cultures of immature rat oligodendrocytes. The researchers then applied HA to these cells which indeed kept the immature cells from maturing into myelin-prod...

Study hints at role of stem cell genes in testicular, breast cancers

...ucture and genetic activity before attaining their mature state. The study revealed that the genetic misregulation leading to seminomas begins very early in the formation of sperm-producing germ cells. Next, turning to cancerous tissue outside of the reproductive system, in this case breast tissue, the tea...

MicroRNAs have shaped the evolution of the majority of mammalian genes

... as immature muscle cells stop dividing and become mature muscle cells, microRNAs are activated and suppress...at are no longer needed at such high levels in the mature muscle. "Many of these evolutionarily conserved microRNA targets are known to be active in the proc...

Study provides insight into cellular defenses against genetic mutation

...h "must read" section is joined to the next in the mature chain. What Maquat and colleagues are learning is that much of the regulatory action of NMD depends on the physical spacing of molecules in the RNA chain. If a stop reading signal occurs too far ahead of the final exon in the chain, as marked by a...

Master regulatory gene found that guides fate of blood-producing stem cells

...lf-renewal; differentiate to become one of several mature blood-cell types; or strike a balance in which one...ughter cell becomes an HSC and the other becomes a mature blood-cell type. "We know that in diseases like leukemia, the first scenario-no differentiated cell...

MIT researcher finds neuron growth in adult brain

...ctural remodeling of neurons does in fact occur in mature brains. This finding means that it may one day be possible to grow new cells to replace ones damaged by disease or spinal cord injury, such as the one that paralyzed the late actor Christopher Reeve. "Knowing that neurons are able to grow in the ...

Male elephants woo females with precise chemistry

...frontalin, depends on whether the male elephant is mature enough and has reached a particular stage of musth, an annual period of sexual activity and increased aggression. "This study reveals the precision and specificity of inter-animal signaling possible," co-author L.E.L. "Bets" Rasmussen, Ph.D., resea...

New study expands understanding of the role of RNA editing in gene control

...fic site where editing leads to suppression of the mature miRNA." Nishikura's team demonstrated that two RN...understanding of the processing steps that lead to mature miRNAs: See http://www.wistar.org/news_info/pressreleases/pr_11.03.05.htm .) The remaining coauthor...

Cattle grazing may help rather than hurt endangered species

...hrimp and tiger salamanders without enough time to mature before their temporary aquatic environments disappear. "Consequently, land managers can play an important role in climate change impacts, i.e. they can exacerbate or ameliorate, the local impacts of global change." Pyke adds. Conservationists may f...

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