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Tag: "but" at biology news

BRCA1 causes ovarian cancer through indirect, biochemical route

...osa cells, also control ovarian tumor development, but from a distance," Dubeau explains. The most likely scenario, he says, is that the granulosa cells normally give off a chemical signal that stops the epithelial cells from growing out of control. When that chemical signal disappears or is muted by a m...

Scientists decipher genome of fungus that can cause life-threatening infections

...ther study ofthis increasingly important pathogen, but the data from the two strainsmay provide insight into what determines virulence," says BrendanLoftus, a scientist at The Institute for Genomic Research (TIGR) who isthe first author of the Science paper. "Although the two Cryptococcusstrains we exami...

Needling Chromosomes Reveals Cell Division Secret

...hey remained apart it revealed they wereseparated; but if they snapped back together the researchers woul...raduatestudent when she performed the experiments, but is now a postdoctoralfellow at the University of North Carolina at Chapel HillPaliulis's skill in th...

Poplar trees redirect resources in response to simulated attack

...utes), we can see that more is going to the roots, but not the chemical form it takes there," Ferrieri said. "We will have to do more tests to see what compounds are formed." Ferrieri believes there may be an increase in compounds that resist microbial attack after plants have soaked up atmospheric carb...

Purdue proves concept of using nano-materials for drug discovery

...llow proteins to readily pass through the membrane but will allow smaller molecules to pass. "This allows us to do separation right in the reactor, which means we can do reactions that could not be done before in such a small device. We can study membrane proteins in a fundamentally new way, which is ve...

In the sea slug's defense against lobsters, confusion is key

..., enlists chemical defenses against its predators, but the mechanisms by which such chemical attacks actually work against their intended targets are not well understood by researchers. New work has now shown that such chemical defenses can involve modes of trickery that had not previously been appreciat...

Scientists discover the cellular roots of graying hair

...can be cured when it is detected andtreated early, but if the lesion penetrates deeply into the skin it i...ITF that regulates Bcl2. Thesemice also went gray, but more gradually than did the mice that had noBcl2. The loss of MITF activity, the investigators say, ...

Researchers identify target for cancer drugs

...ew protein that mTOR interacts with called rictor, but he wasn't yet sure of what these two proteins do t...on"). This process occurs not only in human cells but in other organisms such as the fruit fly. Finding this complex conserved in species as diverse as fl...

Plant hemoglobins: Oxygen handlers critical for nitrogen fixation

...moglobins are also present in plants and bacteria, but until now the physiological role of plant hemoglob...ucial for Nitrogen Fixation in Legume Root Nodules but Not for General Plant Growth and Development" ...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

...can be cured when it is detected andtreated early, but if the lesion penetrates deeply into the skin it i...ITF that regulates Bcl2. Thesemice also went gray, but more gradually than did the mice that had noBcl2. The loss of MITF activity, the investigators say, ...

Scientists rid stem cell culture of key animal cells

...l components have been removed from the media yet, but this is an important step." Working with three of WiCell's five human embryonic stem cell lines, Xu and his team explored the molecular interactions within the stem cell growth medium. He discovered that, in certain conditions, a protein known as fi...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

...can be cured when it is detected andtreated early, but if the lesion penetrates deeply into the skin it i...ITF that regulates Bcl2. Thesemice also went gray, but more gradually than did the mice that had noBcl2. The loss of MITF activity, the investigators say, ...

Experiments provide proof of how traveling in groups protects insects

...nd members," Lorch said. "Predation occurs anyway, but any given individual is far better protected than ...ckets just cost farmers and others a lot of money, but in parts of Africa and elsewhere, locusts can cause widespread famine because they consume crops, an...

Protein Packages Found To Activate Genes; May Be What Regulates Development And Disease

.... "Most prior studies involved only single genes, but we wanted to investigate entire chromosomes, which...egions of the chromatin have only a few "on" tags, but in regions packaging clusters of HOX genes hundreds of such tags exist. Yeast cells don't have such ...

U-M scientists find genes that control growth of common skin cancer

...ed in the Jan. 15 issue of Genes &Development, but is available now on the journal's Web site . Ba...ell populations mayrepresent BCC tumor stem cells, but Dlugosz cautions that there is asyet no definitive evidence that tumor stem cells exist in BCC. Inad...

Experiments provide proof of how traveling in groups protects insects

...nd members," Lorch said. "Predation occurs anyway, but any given individual is far better protected than ...ckets just cost farmers and others a lot of money, but in parts of Africa and elsewhere, locusts can cause widespread famine because they consume crops, an...

New Study from Affymetrix Laboratories Points to Changing View of How Genome Works

...into several different transcripts with different, but overlapping sequences. Often, transcripts from one strand of DNA can share parts of their sequence with overlapping transcripts from the same strand or even from the opposite strand (antisense). Transcripts missing a run of adenosine nucleotides (non...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

... Natural migrastatin's effect is relatively weak, but Dr. Huang suspected the molecule might be manipulated into something more potent. In collaboration with the laboratory of Dr. Samuel Danishefsky at the Memorial Sloan-Kettering Cancer Center, the team went to work creating what's called a "synthetic ...

Critical role in programmed cell death identified

...e mitochondria tend to become smaller or fragment, but whether this fragmentation is a requirement for ce...n and where. During development, 1,090 cells form, but 131 of these cells die; the same cells always die at the same time and at the same place. This featu...

Study: Soap And Water Work Best In Ridding Hands Of Disease Viruses

...had people clean their hands for 30 seconds or so, but that’s not what health-care workers usually do in ...al agents were best at reducing bacteria on hands, but waterless, alcohol-based agents had variable and sometimes poor effects, becoming less effective aft...

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