Researchers found that human embryonic stem cells contain a non-human sialic acid called Neu5Gc, which is incorporated from animal-derived culture materials. The discovery poses a safety concern for the potential therapeutic use of these cells in humans.
Cancer researchers have developed a new method to delay dendritic cell activation, extending the time when immune cells can detect and attack cancer. By using a drug that links molecules, the approach prolongs the activity of dendritic cells, which are key to cancer vaccines.
A study found that healthy older adults with the e-4 allele of the ApoE gene exhibit significantly worse prospective memories, struggling to remember tasks even when instructed to do so. The findings suggest a strong impact of genetic variation on cognitive function and recommend reevaluating the role of ApoE in cognition.
A recent Stanford study has identified a link between genetic differences in African-Americans and an increased risk of hypertension. The research, which analyzed the genetic profiles of over 270 individuals, suggests that specific genes in regions near chromosomes 6 and 21 may contribute to high blood pressure risk in African-Americans.
Researchers at Johns Hopkins Medicine found that sildenafil can treat enlarged hearts by blocking the breakdown of cyclic GMP, a key molecule involved in heart stress. The study showed significant improvements in heart function, including increased contractility and cardiac output, even after hypertrophy had developed.