Most cells can divide only a limited number of times and eventually undergo permanent cell cycle arrest, a state known as cellular senescence. Cellular senescence is mediated by activation of specific cellular signaling pathways involving the proteins p19 ARF and p16 INK4A . Precise control of cell cycle arrest and senescence are important for a number of biological processes, including embryonic development, wound healing, and tissue regeneration. Accumulating evidence also indicates that cellular senescence contributes to tissue aging. In this issue of JCI Insight , Masataka Sugimoto and colleagues at the Juntendo University School of Medicine in Tokyo examined the role of cellular senescence in aging lungs, as there is a well-documented decrease in lung function with age. Using transgenic mice in which they could selectively eliminate cells that express p19 ARF , Sugimoto and colleagues demonstrate that the loss of senescent cells improved lung function in mice. Further studies will be required to determine exactly how senescent cells impair lung function.
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TITLE: Elimination of p19 ARF -expressing cells enhances pulmonary function in mice
AUTHOR CONTACT: Masataka Sugimoto
National Center for Geriatrics and Gerontology
Email: msugimot@ncgg.go.jp
View this article at: http://insight.jci.org/articles/view/87732?key=a306472a4316d65a4eac
JCI Insight is the newest publication from the American Society of Clinical Investigation, a nonprofit honor organization of physician-scientists. JCI Insight is dedicated to publishing a range of translational biomedical research with an emphasis on rigorous experimental methods and data reporting. All articles published in JCI Insight are freely available at the time of publication. For more information about JCI Insight and all of the latest articles go to http://www.insight.jci.org .
JCI Insight