Big Macs alone not to blame for weak arteries
CT scans of 137 mummies spanning four geographies and 4,000 years of history show that hardening of the arteries was commonplace,especially in older individuals,suggesting this key sign of heart disease may be a part of ageing rather than the byproduct of eating too many Big Macs. The findings,presented at the American College of Cardiology meeting in San Francisco and published in the Lancet medical journal,challenge the commonly held belief that atherosclerosis,or hardening of the arteries,is a modern plague brought on by smoking,obesity and sedentary lifestyles. The mummies included individuals from the pre-historic cultures of ancient Peru,Native Americans living along the Colorado River,the Unangan peoples of the Aleutian Islands between Alaska and Siberia,and individuals living in ancient Egypt. Reuters
Scientists grow teeth from mice cells
Dentures may become a thing of the past as researchers believe that missing or diseased teeth may one day be replaced with ones grown from the patients own gum cells. A King s College London team took cells from adult human gum tissue and combined them with another type of cell from mice to grow a tooth. According to their study,published in the Journal of Dental Research,using a readily available source of cells pushes the technology a step closer to being available to humans. Mesenchymal cells can develop into a range of different tissues,including bone,cartilage and fat. Professor Alastair Sloan,an expert in bone biology and tissue engineering at Cardiff University,said the latest development was significant but warned there remained many hurdles before it would be available to patients.