Ghrelin May Play Role in Alcohol Dependence
In addition to its already known function in the regulation of eating, central ghrelin signaling appears to be necessary for the rewarding properties of alcohol, according to research published online June 29 in Proceedings of the National Academy of Sciences.

Living Alone Increases Odds of Developing Dementia
Losing a partner through divorce or death in middle age may triple the risk, study shows.

Why Swine Flu Differs From Seasonal Flu
Pandemic virus affects lungs and stomach, whereas seasonal flu doesn't, researchers say.

If 2 Painkillers Are Banned, What Next?
Other options, available and in the pipeline, could plug a Percocet-Vicodin gap, experts say.

Schizophrenia and Bipolar Disorder Share Genetic Roots
A trio of genome-wide studies – collectively the largest to date – has pinpointed a vast array of genetic variation that cumulatively may account for at least one third of the genetic risk for schizophrenia. One of the studies traced schizophrenia and bipolar disorder, in part, to the same chromosomal neighborhoods.

Another Genetic Link to Testicular Cancer Is Found
Discovery may help explain why disease runs in families.