THURSDAY, Aug. 21 (HealthDay News) -- U.S. researchers have identified 170 more proteins to add to the 91 already known to be associated with programmed cell death, or apoptosis.

They also uncovered new information about how these proteins may function. The findings may help in the development of new drug treatments for stroke and a number of diseases, the researchers said.

WEDNESDAY, July 30 (HealthDay News) -- Researchers have uncovered a potential cause for postpartum depression, at least in mice.

According to the study, from assistant researcher Jamie Maguire and lead researcher Istvan Mody, both of the David Geffen School of Medicine at the University of California, Los Angeles, dysregulation of a particular class of proteins called GABA receptors on the surface of certain neurons in the brain may induce post-delivery mood disorders ranging from "baby blues" to postpartum psychosis.

(HealthDay News) -- Measuring proteins that carry cholesterol in the blood may give a better estimate of heart attack risk than measuring cholesterol, a major study finds.

The study focused on the ratio of two of the proteins, called apolipoprotein B100 (ApoB) and apolipoprotein A1 (ApoA1). The international team of researchers studied data on more than 27,000 people and found that the ratio of apolipoprotein B100 (ApoB) to apolipoprotein A1 (ApoA1) accounted for 54 percent of the risk of heart attack.