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) -- Harvard Stem Cell Institute (HSCI) researchers at Massachusetts General Hospital (MGH) have substantially improved the odds of successfully reprogramming differentiated cells into induced pluripotent stem cells (iPS) by blocking the activity of the gene that instructs the cells to stop dividing. http://www.physorg.com/news169136061.html Biology Mon, 10 Aug 2009 16:00:01 EST news169136061 From the valves in a human heart to the quills on a porcupine to the petals on a summer lily, the living world is as varied as it is vast. For this to be possible, the cells that make up these living things must be just as varied. Parent cells must be able to divide in ways that create daughter cells that are different from each other, a process called asymmetric division. Scientists know how this happens in animals, but the process in plants has been a mystery. http://www.physorg.com/news163942287.html Biology Thu, 11 Jun 2009 12:31:53 EST news163942287 A new study on old rats by a Penn State researcher will shed light on the connection between estrogen deficiency, heart disease and aging in women. http://www.physorg.com/news160653607.html Medicine & Health Mon, 04 May 2009 11:02:02 EST news160653607 Scientists at the Gladstone Institute of Cardiovascular Disease have identified for the first time key genetic factors that drive the process of generating new heart cells. The discovery, reported in the current issue of the journal Nature, provides important new directions on how stem cells may be used to repair damaged hearts. http://www.physorg.com/news159973418.html Medicine & Health Sun, 26 Apr 2009 14:04:36 EST news159973418 Can a grape-enriched diet prevent the downhill sequence of heart failure after years of high blood pressure? http://www.physorg.com/news159644910.html Medicine & Health Wed, 22 Apr 2009 18:49:01 EST news159644910 A protein that the heart produces during its early development reactivates the embryonic coronary developmental program and initiates migration of heart cells and blood vessel growth after a heart attack, researchers at UT Southwestern Medical Center have found. http://www.physorg.com/news158584443.html Medicine & Health Fri, 10 Apr 2009 12:14:40 EST news158584443 (PhysOrg.com) -- By using the amount of carbon 14 in the atmosphere from above-ground nuclear testing in the 1950s and 1960, researchers have determined that cells in the human heart develop into adulthood. http://www.physorg.com/news157903182.html Medicine & Health Thu, 02 Apr 2009 15:00:07 EST news157903182 (PhysOrg.com) -- A pioneering Cornell and University of Bonn study has isolated and purified mouse heart stem cells, settling a debate over whether such cells exist. http://www.physorg.com/news154890995.html Biology Thu, 26 Feb 2009 17:17:26 EST news154890995 Researchers at the Gladstone Institute of Cardiovascular Disease (GICD) and the University of California, San Francisco have unraveled a complex signaling process that reveals how different types of cells interact to create a heart. It has long been known that heart muscle cells (cardiomyocytes) actively divide and expand in the embryo, but after birth this proliferative capacity is permanently lost. http://www.physorg.com/news154097092.html Biology Tue, 17 Feb 2009 12:45:34 EST news154097092 (PhysOrg.com) -- A little more than a year after University of Wisconsin-Madison scientists showed they could turn skin cells back into stem cells, they have pulsating proof that these "induced" stem cells can indeed form the specialized cells that make up heart muscle. http://www.physorg.com/news153679352.html Medicine & Health Thu, 12 Feb 2009 16:42:59 EST news153679352 (PhysOrg.com) -- Cellular engineers at the University of Pennsylvania have determined that cardiomyocytes, the specialized cells that form the heart muscle, thrive when cultured in an environment that mimics their own elastic nature but falter, weaken or die when `grown` on stiffer or softer materials. http://www.physorg.com/news150568853.html Biology Wed, 07 Jan 2009 16:40:53 EST news150568853 A compound designed to prevent chest pains in heart patients has shown promising results in animal studies, say scientists. In the second issue of the British Journal of Pharmacology to be published by Wiley-Blackwell, researchers from the Centre de Recherche Pierre Fabre in France, show that the novel compound F15845 has anti-angina activity and can protect heart cells from damage without the unwanted side effects often experienced with other drugs. http://www.physorg.com/news150536526.html Medicine & Health Wed, 07 Jan 2009 07:42:06 EST news150536526 Embryonic stem cells could provide a new way of testing drugs for dangerous side effects, according to a leading British researcher. http://www.physorg.com/news148804610.html Medicine & Health Thu, 18 Dec 2008 06:36:50 EST news148804610 Up until today scientists assumed that the adult heart is unable to regenerate. Now, researchers and cardiologists from the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch and the Charité - Universitätsmedizin Berlin (Germany) have been able to show that this dogma no longer holds true. Dr. Laura Zelarayán and Assistant Professor Dr. Martin W. Bergmann were able to show that the body`s own heart muscle stem cells do generate new tissue and improve the pumping function of the heart considerably in an adult organism, when they suppress the activity of a gene regulator known as beta-catenin in the nucleus of the heart cells. http://www.physorg.com/news148228129.html Medicine & Health Thu, 11 Dec 2008 14:28:49 EST news148228129 Researchers at the University of Utah are enrolling people in a new clinical trial that uses a patient's own stem cells to treat ischemic and non-ischemic heart failure. http://www.physorg.com/news146146097.html Medicine & Health Mon, 17 Nov 2008 12:08:17 EST news146146097 Broken hearts could one day be mended using a novel scaffold developed by MIT researchers and colleagues. http://www.physorg.com/news144852736.html Medicine & Health Sun, 02 Nov 2008 12:52:16 EST news144852736 University of Iowa researchers and colleagues in France have identified a gene variant that causes a potentially fatal human heart rhythm disorder called sinus node disease. Also known as "sick sinus syndrome," the disease affects approximately one in 600 heart patients older than 65 and is responsible for 50 percent or more of the permanent pacemaker placements in the United States. http://www.physorg.com/news142596831.html Medicine & Health Tue, 07 Oct 2008 11:13:51 EST news142596831