A vital molecular step in cell migration, the movement of cells within the body during growth, tissue repair and the body’s immune response to invading pathogens, has been demonstrated by researchers in the University of California, San Diego (UCSD) School of Medicine. Published in the March 27 online edition of Nature Cell Biology and the journal’s upcoming April print edition, the study describes how a the interaction of alpha4 integrin adhesion receptor with a protein called paxillin creates directional movement of a cell by inhibiting a protein called Rac.
"Understanding how this protein contributes to directional movement of a cell provides a new insight into cell migration and ultimately could lead to therapeutic interventions in autoimmune diseases such as multiple sclerosis and Crohn’s disease," said the paper’s first author Naoyuki Nishiya, Ph.D., a postgraduate researcher in the lab of senior author Mark Ginsberg, M.D., UCSD professor of medicine. "Since cell migration plays an important role in the immune response, as leukocytes move toward targets, a therapy that stops that movement could potentially help in autoimmune disorders where the body’s immune system incorrectly attacks the body’s own tissue."
From the genesis of human life to birth and beyond, cell migration is a complex, extremely important process that is not completely understood by researchers. In order to move, a cell must be polarized so that the molecular processes at the front end and back end are different, leading only to forward movement. One of the first steps in cell migration is the initiation of activity by Rac that extends protrusions out of the cell. These protrusions serve as tractor sites for migration as the cell moves toward its intended target. If Rac were active throughout the cell, it would extend protrusions in all directions, in essence keeping the cell in one place.
Sue Pondrom | EurekAlert!
New risk factors for anxiety disorders
24.02.2017 | Julius-Maximilians-Universität Würzburg
Stingless bees have their nests protected by soldiers
24.02.2017 | Johannes Gutenberg-Universität Mainz
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Life Sciences
24.02.2017 | Life Sciences
24.02.2017 | Trade Fair News