Researchers at Yale University, in the US, have isolated the brain circuitry that coordinates predatory hunting, according to a study in the January 12 issue of Cell. One set of neurons in the amygdala, the brain's center of emotion and motivation, cues the animal to pursue prey.
Whether made by the body or ingested through diet, cholesterol plays a vital role in cells. Cholesterol is a building block of steroids and hormones, including those that trigger puberty and support pregnancy. A new study implicates a surprising regulator of cholesterol in cells' ability to make these hormones, especially in tissues associated with fertility, such as the ovaries.
New research at the Weizmann Institute of Science provides insight into the question of why the mammalian heart fails to regenerate, on one hand, and demonstrated, in adult mice, the possibility of turning back this fate.