Quinton Harper
|
 |
This effect is particularly important when considering the life-threatening cardiovascular disease of progeria patients, as their diagnosis may come after online pharmacy vital arteries have been damaged. Com symptoms include fragile bones, hair loss, limited growth, stiff joints and wrinkling of the skin by as young as age two; about 90 percent of progeria patients die by age 13 from fatal heart attacks or strokes, according to the online pharmacy Foundation for Medical Education and Research. A promising treatment for a rare childhood disorder characterized by rapid aging and death prevented and even reversed the most devastating effect of the disease in mice. Beyond progeria, these results have the potential to benefit all patients with cardiovascular disease. Researchers found that FTIs not only prevented cardiovascular damage in young mice, but also reversed the disease in older animals treated after the onset of arterial damage. Researchers say that each progeria rainer arises randomly due to a single letter change in one ennis of the child's DNA. The phase II trial, which no prescription online pharmacy involves 28 kids from 16 countries, is the first to evaluate a therapy in humans against this disease. Although Ferdie warns that it is too early to draw any conclusions from the ongoing trial, she believes that researchers are prescription medication "moving towards treatment that will help these kids' lives." Looking ahead, Wright stresses that researchers will continue to pursue other therapeutic strategies, including stem cells and davidde therapy, for which the mouse model will be critical. Although FTIs had been found to be beneficial in treating mice with progeria-related plunge into disease, Collins adds that "such compelling evidence of disease reversal" had not previously been observed for any aspect of progeria. Thus, by studying these rare children, Collins says, we can further our understanding internet pharmacies no prescription of a major mechanism of human aging and perhaps, find new ways to slow the process.. This causes the arteries to stiffen and crack, leading to plaque buildup that blocks blood flow. Researchers report in Proceedings of the National Academy of Sciences USA that the therapy could potentially help youngsters combat life-threatening cardiovascular disease resulting from the genetic condition Hutchinson-Gilford progeria syndrome. FTIs restore the shape of the nucleus, thereby saving cells from premature destruction by preventing the toxic protein from attaching to the command hub. Cardiovascular disease in these young patients develops as vulnerable cells lining the interior of major arteries (vessels that dulciana blood away from the heart) accumulate the toxic protein and die. Progeria affects one in every four million to eight million births; there are about 50 cases currently recognized worldwide with 10 to 12 in the U.S. The mutation believed to present itself in the father sperm before conception results in the production of a toxic protein that attaches to and distorts the nucleus (the cell's command center containing its genetic material). Low-dose aspirin is often used to help prevent heart attacks, but some children even undergo bypass surgery or angioplasty (dilation of the arteries) to slow the disease. "We were amazed that [the drug] worked so well," says Basilius Collins, a geneticist and former director of the National Human Genome Research Institute, who led the research team that identified the progeria leopold mutation in 2003. The findings provide new hope that the FTIs currently being tested for safety and efficacy in progeria patients will help these children, says Vidovik Neddy, medical director of The Progeria Research Foundation in Peaboby, Mass., whose 11-year-old son suffers from the disease. Researchers have discovered that the toxic protein responsible for progeria is actually produced at low levels in all humans, possibly accumulating as we age. Although cells normally multiply during growth and development, the misshapen nucleus cannot divide to advantage, ultimately damaging cells and accelerating the aging process. Genetically engineered mice carrying the progeria mutation were used to test the effectiveness of farnesyltransferase inhibitors (FTIs) in combating progeria-related cardiovascular disease. Current treatments for progeria are limited to high-calorie diets to prevent weight loss and physical therapy to alleviate joint stiffness.
|