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INTERN DAILY
New lung 'organoids' in a dish mimic features of full-size lung
by Staff Writers
New York, NY (SPX) May 16, 2017


Bright-field images of day 50 LBO-derived Matrigel colonies from RUES2 cells. Representative of six independent experiments. Scale bars, 500?um. Credit Snoeck lab/Columbia University Medical Center

New lung "organoids" - tiny 3-D structures that mimic features of a full-sized lung - -have been created from human pluripotent stem cells by researchers at Columbia University Medical Center (CUMC). The team used the organoids to generate models of human lung diseases in a lab dish, which could be used to advance our understanding of a variety of respiratory diseases.

A paper detailing the discovery was published in the April 24 online issue of Nature Cell Biology.

Organoids are 3-D structures containing multiple cell types that look and function like a full-sized organ. By reproducing an organ in a dish, researchers hope to develop better models of human diseases, and find new ways of testing drugs and regenerating damaged tissue.

"Researchers have taken up the challenge of creating organoids to help us understand and treat a variety of diseases," said Hans-Willem Snoeck, PhD, professor of medicine (in Microbiology and Immunology) at CUMC and lead investigator of the study. "But we have been tested by our limited ability to create organoids that can replicate key features of human disease."

The lung organoids created in Dr. Snoeck's lab are the first to include branching airway and alveolar structures, similar to human lungs.

To demonstrate their functionality, the researchers showed that the organoids reacted in much the same way as a real lung does when infected with respiratory syncytial virus (RSV). Additional experiments revealed that the organoids also responded as a human lung would when carrying a gene mutation linked to pulmonary fibrosis.

RSV is a major cause of lower respiratory tract infection in infants and has no vaccine or effective antiviral therapy. Idiopathic pulmonary fibrosis, a condition that causes scarring in the lungs, causes 30,000 to 40,000 deaths in the U.S. each year. A lung transplant is the only cure for this condition.

"Organoids, created with human pluripotent or genome-edited embryonic stem cells, may be the best, and perhaps only, way to gain insight into the pathogenesis of these diseases," Dr. Snoeck says.

Research Report: "A three-dimensional model of human lung development and disease from pluripotent stem cells."

INTERN DAILY
Bioinspired agent kills drug-resistant bacteria
Washington DC (SPX) May 04, 2017
Researchers in Ireland have developed a bioinspired antimicrobial treatment that can rapidly kill drug-resistant bacteria. The treatment consists of iodo-thiocyanate complexes, which are inspired by enzymes and reactive molecules produced by our immune system. Microbial resistance to antibiotics and biocides is increasing, and our ability to effectively treat bacterial infections and conta ... read more

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