A federal preschool program did more than improve educational opportunities for poor children in Mississippi during the 1960s - it created activists. 

A team of bioengineers at Brigham and Women's Hospital (BWH), led by Ali Khademhosseini, PhD, and Nasim Annabi, PhD, of the Biomedical Engineering Division, has developed a new protein-based gel that, when exposed to light, mimics many of the properties of elastic tissue, such as skin and blood vessels. In a paper published in Advanced Functional Materials, the research team reports on the new material's key properties, many of which can be finely tuned, and on the results of using the material in preclinical models of wound healing.

Pink salmon that begin life in freshwater with high concentrations of carbon dioxide, which causes acidification, are smaller and may be less likely to survive, according to a new study.

The risks of ocean acidification on marine species have been studied extensively but the impact of freshwater acidification is not well understood. The study is one of the first to examine how rising carbon dioxide levels caused by climate change can impact freshwater fish.

Cancer cells play it dirty to get what they want. They are survival artists with a strong criminal streak. They surround themselves with a protective shield of extra-cellular material and then secure supply lines by attracting new blood vessels.

To achieve both of these aims, they set immune cells a honey trap by releasing attractants in the form of messenger molecules which lure immune cells to growing tumours. At the cancer site, the abducted immune cells release growth hormones to guide new blood vessels to the tumour and help build a protective shield.

For the first time gene therapy for cystic fibrosis has shown a significant benefit in lung function compared with placebo, in a phase 2 randomized trial. The technique replaces the defective gene response for cystic fibrosis by using inhaled molecules of DNA to deliver a normal working copy of the gene to lung cells.

“Patients who received the gene therapy showed a significant, if modest, benefit in tests of lung function compared with the placebo group and there were no safety concerns,” said senior author Professor Eric Alton from the National Heart and Lung Institute at Imperial College London. “Whilst the effect was inconsistent, with some patients responding better than others, the results are encouraging.”

Every time you put on bug spray this summer, you're another front in the ongoing war between humans and mosquitoes - and being a citizen scientist in a complex evolutionary experiment.

Scientists have found that between 5 and 20 percent of a mosquito population's genome is subject to evolutionary pressures at any given time, creating a strong signature of local adaptation to environment and humans. This means that individual populations are likely to have evolved resistance to whatever local selection pressures are typical in their area, and that understanding the genomes of those populations could one day help inform agencies about which pesticides are likely to be most effective against them.