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FSU biologists describe key role of signal-transcribing gene during cell cycle

Study in Oct. 1 'Development' shows when, where Alzheimer's, some cancers and genetic ills beginT. Biologists at Florida State University have uncovered the pivotal role of a gene called "Cut" that acts as a sort of middleman in cell-to-cell communication.

A DNA-binding protein, Cut interprets and transcribes the developmental signals sent through the "Notch" gene, which regulates a layer of epithelial cells as they replicate and divide. But when Cut garbles those signals the result is uncontrolled cell proliferation, sometimes with dire genetic and health consequences.

Results of the study are described in the Oct. 1 edition of the journal Development.

Led by FSU assistant professor Wu-Min Deng, the research has provided a more precise understanding of just how and where molecular mechanisms that drive cell cycle behavior and fate go wrong along the critical Notch pathway ?? a communication channel already associated with the genesis of several genetic and neuromuscular diseases; the most common complex congenital heart disorder; and later life ills such as Alzheimer's, breast and lung cancer, and leukemia.

"We now know that the transcription factor Cut is the key there," said Deng.

Assisted by FSU graduate student and co-author Jianjun Sun, Deng conducted the study using the powerful Drosophila (fruit fly) genetic model. Over the course of a year, they tracked the cell-to-cell communication in Drosophila egg chambers that control cell proliferation.

"We believe the specific cell-to-cell signaling and dysfunction observed in fruit flies is applicable to mammals, which also possess genes Notch and Cut," said Deng.

The researchers traced the journey of transmissions originating from Notch ?? which carries information gleaned from other cells ?? following the signals down the Notch pathway as Cut linked them to the control of cell proliferation in the egg chambers, which they observed at different stages.


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Source:Florida State University


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