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Children who are physically or sexually abused are more than twice as likely to have asthma as their peers, according to a recent study of urban children in Puerto Rico. In fact, physical and sexual abuse was second only to maternal asthma in all the risk factors tested, including paternal asthma and indicators of socioeconomic status.

How do blood vessel cells understand that they should organize themselves in tubes and not in layers? A special type of "instructor" molecule is needed, according to new research. This might be an important step towards using stem cells to build new organs.

The response to insulin-like growth factor 1 (IGF-I) in breast cancer cells predicts an aggressive tumor that is less likely to respond to treatment, according to new research. The finding gives impetus to the movement to tailor cancer treatments to attributes of the various tumors.

For the first time, researchers have described hour-by-hour changes in the amount of amyloid beta, a protein that is believed to play a key role in Alzheimer's disease, in the human brain.

Scientists have presented the state of evidence concerning the relation of antidepressants and suicidal behavior and critically commented on the current discussion with regard to the role of antidepressive treatment in real-life clinical practice.

Researchers have found evidence explaining why a common chemotherapy drug, cisplatin, may not always work for every cancer patient. They have shown that when a variant version of a key protein that normally causes cell death is active, patients may be resistant to the cancer-killing drug.

New research strongly suggests that a mix of preventative agents, such as those found in concentrated black raspberries, may more effectively inhibit cancer development than single agents aimed at shutting down a particular gene. Researchers examined the effect of freeze-dried black raspberries on genes altered by a chemical carcinogen in an animal model of esophageal cancer.

People who walk on a treadmill even years after stroke damage can significantly improve their health and mobility, changes that reflect actual "rewiring" of their brains, according to new research.

The tick-tock of your biological clock may have just gotten a little louder. The number of genes under control of the biological clock in a much-studied model organism is dramatically higher than previously reported. The new study implies that the clock may be much more important in living things than suspected only a few years ago.

The risk of heart attack patients having repeat attacks after they are discharged from hospital is being underestimated, research has shown. An international study raises concerns that some patients may not be receiving the optimum medical treatment and follow-up care because doctors are misjudging the risk of a further heart attack.