First Human Cord Blood Cell to Become Lung Cell

Paul, USA) have for the first time differentiated human stem cells into type II alveolar cells, the type of epithelial cells that help stabilize the lung's air sacs during breathing.

The researchers used proprietary stem cell isolation technology developed by BioE (also in St. Paul) to derive the Multi-Lineage Progenitor Cell (MLPC) from cord blood and differentiate it into lung cells responsible for making surfactant, a substance enabling respiration.

Type II alveolar cells also can turn into type I alveolar cells, which form the thin, blood-gas barrier through which gas exchange occurs during respiration. Results of the University of Minnesota's MLPC study were presented at the annual meeting of the International Society for Cellular Therapy (ISCT) in Berlin (Germany) in May 2006.

Turning a cord blood stem cell into an alveolar cell represents a significant milestone in stem cell research, said David McKenna, M.D., assistant professor of lab medicine and pathology and assistant medical director of the Clinical Cell Therapy Lab at the University of Minnesota, and a BioE research collaborator. Though further research is needed, it's plausible the MLPC could be used to help develop a human lung model for research purposes and/or eventual therapeutic application to treat a number of respiratory conditions, such as emphysema and pulmonary fibrosis, as well as pulmonary injury due to therapy-related causes.

The results of the University of Minnesota study also further demonstrate the MLPC's unique ability as a cord blood stem cell to expand and differentiate, in a controllable fashion, into tissues representative of the three germinal layers (e.g., ectoderm, mesoderm and endoderm), which give rise to the body's more complex tissues, organs and organ systems. Typically, researchers confirm endodermal potential by differentiating a stem cell into hepatic (liver) cells. In the case of the MLPC, researchers have demonstrated its endodermal potential by turning it not only into liver and pancreas precursors, but now, alveolar cells.

The availability of a highly functional human lung model in vitro is something that has eluded researchers for some time and will prove to be very valuable for studying respiratory conditions,” observed Michael Haider, president and CEO of BioE.



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