http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- EphA4 is a protein which is attached to the surfaces of many types of human cells and plays a role in a wide range of biological processes. EphA4 functions by binding to ephrin ligands, cell surface proteins which sit on opposing cells. The signalling cascades which result from this contact direct cells to move in a particular direction, to the right place in the body. This is critical in the development of the nervous system, and has also been linked with the suppression of melanoma tumours. http://www.physorg.com/news175521338.html Chemistry Fri, 23 Oct 2009 13:20:01 EST news175521338 A team of international molecular scientists, led by a Monash University researcher has discovered a new, fast mechanism by which cells communicate change - for example their location during spreading of a cancer in the human body - to adjacent cells. http://www.physorg.com/news174738284.html Biology Wed, 14 Oct 2009 11:40:02 EST news174738284 The natural cycle of building bone to maintain skeletal strength and then breaking it down for the body's calcium needs is delicately balanced, but diseases like osteoporosis break down too much bone without adequate bone replacement, leading to bone fractures. http://www.physorg.com/news174144258.html Medicine & Health Wed, 07 Oct 2009 14:40:01 EST news174144258 The role of a protein called XIAP in the regulation of cell death has been identified by Walter and Eliza Hall Institute researchers and has led them to recommend caution when drugs called IAP inhibitors are used to treat cancer patients with underlying liver conditions. http://www.physorg.com/news167488280.html Medicine & Health Wed, 22 Jul 2009 13:31:52 EST news167488280 The oceans teem with microscopic bacteria that produce much of Earth's oxygen as they absorb carbon dioxide greenhouse gas. But fast-mutating viruses also populate the seas, attacking marine bacteria in an ages-old evolutionary arms race. http://www.physorg.com/news165772697.html Biology Thu, 02 Jul 2009 16:58:51 EST news165772697 Researchers in the "Molecular Infection Biology group" at the Helmholtz Centre for Infection Research (HZI) in Braunschweig and the Braunschweig Technical University could now demonstrate for the first time that bacteria of the Yersinia genus possess a unique protein thermometer - the protein RovA - which assists them in the infection process. http://www.physorg.com/news162040657.html Biology Wed, 20 May 2009 12:18:27 EST news162040657 The bacteria responsible for chronic infections in cystic fibrosis patients use one of the sugars on the germs' surface to start building a structure that helps the microbes resist efforts to kill them, new research shows. http://www.physorg.com/news159537486.html Biology Tue, 21 Apr 2009 12:58:29 EST news159537486 Scientists used to think most of the exchange of information between cells was conducted at the surface, where cell receptors receive signals from other cells. http://www.physorg.com/news156711582.html Medicine & Health Thu, 19 Mar 2009 20:00:38 EST news156711582 The bacterium Escherichia coli is part of the healthy human intestinal flora. However, E. coli also has pathogenic relatives that trigger diarrhea illnesses: enterohemorrhagic E.coli bacteria. During the course of an infection they infest the intestinal mucosa, causing injury in the process, in contrast to benign bacteria. http://www.physorg.com/news156686308.html Biology Thu, 19 Mar 2009 13:02:20 EST news156686308 Scientists have developed a way to manipulate bacteria so they will grow mutant sugar molecules on their cell surfaces that could be used against them as the key component in potent vaccines. http://www.physorg.com/news154632174.html Chemistry Mon, 23 Feb 2009 17:23:15 EST news154632174 Cornell researchers have provided new insight into the molecular mechanism underlying an essential cellular system. They have discovered how receptors on cell surfaces turn off signals from the cell's environment, a function that is vital for cell functions such as growth, division and death. http://www.physorg.com/news151344416.html Biology Fri, 16 Jan 2009 16:06:56 EST news151344416 A study from a team of researchers led by Dr. Andrew P. Makrigiannis, Director of the Molecular Immunology Research Unit at the IRCM, has identified a new mechanism regulating interferon production. This discovery, co-authored by scientists from the International Medical Center of Japan (Tokyo), the National Cancer Institute at Frederick (Maryland) and the McGill Centre for the Study of Host Resistance, was published on December 22, 2008 in the Journal of Experimental Medicine. http://www.physorg.com/news150996491.html Medicine & Health Mon, 12 Jan 2009 15:28:11 EST news150996491 UC Davis Cancer Center researchers report today the discovery of a molecule that targets glioblastoma, a highly deadly form of cancer. The finding, which is published in the January 2009 issue of the European Journal of Nuclear Medicine and Molecular Imaging, provides hope for effectively treating an incurable cancer. http://www.physorg.com/news149769509.html Medicine & Health Mon, 29 Dec 2008 10:38:29 EST news149769509