Alumna Sarah
McCormick Herlihy (Biology/Toxicology
’08) continues work on her Ph.D. in Biology at Texas A&M University. The focus of her research is to
elucidate a branched signal transduction pathway of a protein secreted by the
social ameoba Dictyostelium. The ligand for the pathway slows to proliferation
of cells allowing them to develop into fruiting bodies (containing spores) and
therefore increasing survival. It
also causes chemorepulsion of cells (they move away from high concentrations of
the protein). A paper on her work has just been published in PLOS
ONE. In a second paper recently published
in the Journal
of Immunology, she identified a human protein (with structural
similarity to the Dictyostelium ligand) which repels human and mouse
neutrophils. Sarah’s work
has potential therapeutic applications to the treatment of acute respiratory
distress syndrome, or ARDS. When
neutrophils enter the lungs following smoke inhalation (one of the major causes
of ARDS), lung damage can be increased.
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