"This APC knock-out mouse is different because APC is eliminated from a specific type of cell in the brain during a critical period of development. This leads to deregulation of key signaling pathways and produces the cognitive and behavioral changes that we observed," explained co-first author Jesse Mohn, Ph.D., a graduate of the Sackler School and now a scientist at Galenea Corp.
"APC loss leads to molecular changes predicted to resemble, at least in part, those caused by spontaneous mutations in another gene, CHD8, recently identified as a high confidence risk factor for sporadic autism, that is, autism that arises spontaneously rather than inherited genetic mutations from parents. Thus, our findings are relevant to autism and intellectual disabilities caused by other human gene mutations, not only APC," said senior author Michele Jacob, Ph.D., professor of neuroscience at Tufts University School of Medicine, and member of the Cell, Molecular and Developmental Biology; Cellular and Molecular Physiology; and Neuroscience program faculties at the Sackler School.
"This study demonstrates the vital role that APC plays as a central hub that links to and regulates multiple signaling pathways within nerve cells that are essential for normal cognition and social behavior," added Antonella Pirone, Ph.D., a co-author and postdoctoral scholar in the Jacob lab. "We hope that identifying these novel molecular and functional changes caused by APC loss will contribute to the development of effective treatments for autism and cognitive impairments in patients."
Tufts University has filed patent applications claiming the use of the new mouse model for the screening of improved therapeutics.
|Contact: Siobhan E. Gallagher|
Tufts University, Health Sciences Campus