The discovery of complex movements of epithelial cells within the body may provide better ways of managing drug therapies for diseases such as cancer, asthma, cardiovascular ailments and glaucoma -- and aid in tissue engineering as well. Researchers found that when an epithelial layer advances, cells move forward but also backward, as if to fill a vacuum. The research is being conducted at the Harvard School of Public Health and the Institute for Bioengineering of Catalonia.

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