Birds take cues from their competitors
...has long been a matter of debate. Now, a new study reveals that some birds learn not only from each other, but also from their competitors. The findings appear online on July 5th in Current Biology, a Cell Press publication. Through a novel field experiment, the researchers showed that female members of tw...JCI Table of Contents -- July 2, 2007
... TITLE: An inducible mouse model for skin cancer reveals distinct roles for gain- and loss-of-function p53 mutations AUTHOR CONTACT: Dennis R. Roop University of Colorado at Denver and Health Sciences Center, Denver, Colorado, USA. E-mail: dennis.roop@uchsc.edu Carlos Caulin MS Anderson Cancer ......ape notice. However, MRI is so sensitive that it reveals even non-cancerous suspicious growths in the breasts, resulting in many unnecessary biopsies and additional scans, not to mention heightened anxiety. In this new combined approach, any suspect lesions can be studied with MRS, with no need for an inv...New method for reading DNA sheds light on basis of cell identity
...ells contain an explicit chromatin-based code that reveals the developmental choices they have already made as well as those decisions that lie ahead. Unraveling the mysteries of chromatin holds great promise for understanding how cells in the body with nearly identical DNA assume such different forms an...JCI table of contents: June 21, 2007
...cardiac dysfunction in mice. This new animal model reveals that constant activation of AT1 leads to cardiac and renal fibrosis in spite of only a modest increase in blood pressure, and will be useful for investigating the role of angiotensin II in organs affected by some forms of human hypertension. Title:...Pendulum love, science class gender gaps, musical mind mirrors, and unparticle physics
...University of North Texas. A statistical analysis reveals a remarkable similarity between the distributions produced by music compositions and brain activity. Brain activity was monitored through an electroencephalograph (EEG), which records electrical signals on the surface of the brain. The musical comp...In nature, proteins sweep up nanoparticles
...in the June 15, 2007 issue of the journal Science, reveals that the proteins travel far from the microbes that produce them, and then amass metal nanoparticles into piles that are too large to be swept away by underground currents. Precisely how and why the bacteria undertake this bit of housecleaning remain...ENCODE map changes view of the human genome landscape
...2007. Integrated analysis of experimental datasets reveals many novel promoters in 1% of the human genome. Genome Res. 17: 720-731. (doi:10.1101/gr.5716607) 3. Evolving notions of biological function Dr. Elliott Margulies and colleagues sequenced the ENCODE regions in 23 mammalian species, aligned th...'Wurst' ensures that the respiratory system works
...nto the tissue. "The tracheae system in insects reveals similarities to our own lungs," explains the Bonn-based development biologist Professor Dr. Michael Hoch. "Our lungs also consist of a system of tubes that branch out like trees, finally ending in the air cells called alveoli. This is where the inhal...Daddies' girls choose men just like their fathers
...e child and the adult upon whom they imprint. This reveals the importance of parental relationships in partne...with Nigel Lawson and Norman Cook with Johnny Ball reveals some close correlations, especially in the central facial area, including the nose, chin and eyes. ...New study finds genetically engineered crops could play a role in sustainable agriculture
...ortant study by an interdisciplinary research team reveals how an in-depth analysis of large quantities of existing data from many individual experiments can provide a greater understanding of a complex issue. The project is enhanced by the creation of a public database, Nontarget Effects of Bt Crops, devel...Talcum powder stunts growth of lung tumors
...shed in the European Respiratory Journal in April, reveals that talc stimulates healthy cells to produce endostatin, a hormone considered the magic bullet for treating metastatic lung cancer. The UF researchers say talc is an exciting new therapeutic agent for a cancer largely considered incurable. We fou...Study shows big power of small RNAs, not just proteins, in halting cancer
...act that p53 uses miRNAs to stop tumor cell growth reveals a completely new dimension of this critical cancer fighting pathway and its ability to trigger the genetic death of cancer cells. Our findings certainly lead to a deeper understanding of a critical tumor suppression mechanism but also may provide i...ACS News Service Weekly PressPac -- May 23, 2007
...cle, written by C&EN Senior Editor Cheryl Hogue, reveals a little-known market for mercury , a toxic liquid metal now being phased out for most industrial uses in developed countries because of toxicity, among millions of small-scale gold miners in Asia, South America and Africa. Miners add mercury as they...JCI table of contents: May 24, 2007
...ially responsive to treatment with TZDs. The study reveals the essential role for PPARgamma in macrophages for the maintenance of insulin action in the whole body as well as in mediating the antidiabetic effects of TZDs. TITLE: Macrophage PPARgamma is required for normal skeletal muscle and hepatic insulin...New genetic data overturn long-held theory of limb development
...ists found that it is present in paddlefish, which reveals that a pattern of gene activity long thought to be unique to vertebrates with hands and feet is in fact much more primitive. This is the first molecular support for the theory that the genes to help make fingers and toes have been around for a long t...Mechanism of microRNAs deciphered
...s published in the current online issue of Nature, reveals that microRNAs block the initiation of translation, the earliest step in the process that turns genetic information stored on messenger RNAs into proteins. The central dogma in molecular biology says that the genetic information stored as DNA is tr...Spreading viruses as we breathe
...earch by Queensland University of Technology which reveals airborne viruses can spread far and wide. Professor Lidia Morawska, director of QUT's International Laboratory for Air Quality and Health, said the study dispelled the myth that viruses emitted from humans only travel a metre in the air. Profess...The yin and the yang of B-cell development
...paper in the May 15th issue of Genes & Development reveals how a protein called Yin Yang 1 regulates early B cell development. B cells are the antibody-producing cells of the body, which form the basis for the body's recognition of foreign pathogens. B cells undergo a multi-staged maturation process, wher...Study led by Scripps Research scientist reveals little-known cell networks vital to circadian rhythm
...ration of cellular circadian clocks. "Our study reveals some previously overlooked mechanisms for sustaining cellular circadian rhythm," said Steve A. Kay, whose laboratory spearheaded the research. "Essentially, when cells communicate en masse through these highly networked electrical or neurochemical in...