Common cancer gene sends death order to tiny killer
...," says Mendell. "And there is now a great deal of evidence that microRNAs themselves can act to either promote cancer or to stop cancer spread." To test their idea, the team first chemically damaged the DNA of two sets of colon cancer cells, one missing p53 and the other containing healthy p53. They then l...Lessons from the orangutans: Upright walking may have begun in the trees
..., this distinction is complicated by recent fossil evidence that some early hominins, including Lucy ( Australopithecus afarensis ), lived in woodland environments, while even earlier forms such as Millennium Man ( Orrorin ) appear to have lived in the forest canopy and moved on two legs. "Our findings blur......next step and provides the definitive experimental evidence for how mimicking sounds helps an animal survive....Gene expression patterns predict rapid decline in idiopathic pulmonary fibrosis patients
...gh School of Medicine, these findings offer strong evidence that rapid progressors represent a distinct clinical phenotype compared with the usual slower progressing patients. "We are only now starting to really understand IPF and to characterize it," Dr. Kaminski said. "Therefore, it is critical for patien...In search of the biological significance of modular structures in protein networks
...ut much biological significance. There is little evidence that the previously observed structural modules correspond in any way to functional units. It seems that previous analyses may have even created some of these modules through the techniques used to investigate protein properties. Refuting previous st...Eavesdropping comes naturally to young song sparrows
...cquire their song repertoires have found the first evidence that young birds choose many of their songs by eavesdropping on the tuneful interactions between other sparrows. In laboratory experiments, the young sparrows were exposed to two adult "tutors," one of which they directly interacted with vocally and...Extra-aggressive form of idiopathic pulmonary fibrosis identified
...ess journal PLoS ONE on Wednesday 30th May, strong evidence indicating that a subset of IPF patients has a short duration of symptoms before diagnosis and display an accelerated clinical course to end-stage disease. The authors postulate that these "rapid progressor" patients, predominantly smoking males, rep...ACS News Service Weekly PressPac -- May 23, 2007
...bacteria Environmental Science & Technology New evidence implicating beach sand as a reservoir for E. coli the bacterium that is used as an indicator that water has been contaminated by fecal material has been reported by scientists at the University of Minnesota. In the report, published in the Apri...Ants show us how to make super-highways
...hemselves. This study provides rare quantitative evidence from animal societies that extreme specialisation by a minority can significantly improve the performance of a majority to benefit the group as a whole. It also suggests that these benefits are a consequence of the unusual and derived foraging strate...Adult stem cells from human cord umbilical cord blood successfully engineered to make insulin
...r tests in which the cells to be engineered showed evidence of a characteristic, or marker, known as SSEA-4 that was previously thought to exist only in embryonic cells. They also found that, just as embryonic cells have been shown to do, these adult stem cells produced both C-peptide, a part of the insulin p...Color vision drove primates to develop red skin and hair, study finds
...they show. "Neuroscience research has found some evidence of a perceptual bias for more brilliant colors," said Fernandez, an Ohio University doctoral student. "So, it is reasonable for primates with trichromatic color vision to respond more when they see bright colors." So while foraging may have initial...Some forest birds can survive in agricultural countryside with limited habitat conservation
...the birds in coffee plantations was not sufficient evidence to conclude that they had adapted to life outside their native habitat. Sekercioglu wanted to follow the birds more closely. He and his team set up a comprehensive bird-banding and radio-tracking system to monitor the birds' positions throughout the ...MIT researchers probe bones' tiny building blocks
...y be identified earlier or provide more conclusive evidence of a disorder. The researchers also formulated a computer model to study the effects of their experimental results on larger-scale biomechanical properties. For example, using the model they found that the non-uniform stiffness patterns were adva...JCI table of contents: May 24, 2007
...mice exacerbated the facial deformities, providing evidence that Shh and Gas1 interact. The study suggests tha...sue necrosis in the rela mice. The results provide evidence of a role for RelA/p65 in the protection of pancreatic acinar cells against cell death, via the upre...The first issue of the HFSP Journal is now available
...of protein evolution and provides the first direct evidence of the existence of latent evolution. The Editorial Board of the HFSP Journal represents 5 distinguished scientists from different disciplines but each with a strong focus on living systems:- Arturo Falaschi (International Centre for Genetic...New genetic data overturn long-held theory of limb development
...to land. Prior to this find, scientists had little evidence of where the wrist came from. A popular theory, on...dary of limb development on two fronts: the direct evidence of the fossil record and the morphology, and its relationship with specific genetic mechanisms. What...Tiny genes may increase cancer susceptibility, Jefferson scientists find
(PHILADELPHIA) New evidence indicates that small pieces of noncoding genetic material known as microRNAs (miRNAs) might influence cancer susceptibility. Differences in certain miRNAs may predispose some individuals to develop cancer, say researchers collaborating in a joint stu...New adult brain cells may be central to lifelong learning
... also observed in the new adult neurons anatomical evidence of the same kind of formation of new connections that take place in the brains of newborns as they wire new pathways in response to experience. The researchers wrote that, since the adult form of critical-period plasticity resembles that seen in yo...Sheep offer model for undernourishment in pregnant teen girls
...he course of gestation. The researchers point to evidence that competition for nutrients between a mother and her fetus "will impair nutrient supply in girls who are still growing during pregnancy. Thus formulating correct dietary advice for these young adolescent girls is likely to be complex, particularly...... of those people whom it infects. Epidemiological evidence has long implied that there is a connection betwee... dietary queues. Working from the epidemiological evidence that H. pylori infection combined with a high-salt diet results in an increased incidence of severe...