Health News Archive - June 12, 2005
Myocardial perfusion imaging (MPI) is important for the management of patients with suspected or known coronary artery disease (CAD). Nuclear cardiology is the most widely used noninvasive approach for the assessment of myocardial perfusion.
"I screwed up my eyes, peered closely at the monitor. It was still no use. 'I can't see a baby shape,' I frowned. 'Wait,' the doctor gasped. 'It's twins... no... hang on... it's triplets!' I nearly slipped off the hospital bed.
Researchers at UT Southwestern Medical Center have discovered how a small molecule of RNA called microRNA â€“ a chemical cousin of DNA â€“ helps fine tune the production of a key protein involved in the early development of heart muscle.
Often cancer research goes like this: study cancerous cells in a lab dish, find mutations that appear in many of the samples, develop drugs to target proteins made by the mutated genes, and voila, new chemotherapy drugs are born. Or at least that's the hope.
Parents often wonder why it takes a year or more and multiple shots to fully immunize their children against diseases like diphtheria and pertussis. The reason is twofold. First, a single vaccination generates only a small amount of immunity and booster shots are needed to build up immunity to protective levels. The second reason is due to the fact that a substantial "lag time" is required by the immune system between initial immunization and subsequent booster shots to maximize the size of each boost.