Premium
Mutation of the feh‐1 gene, the Caenorhabditis elegans orthologue of mammalian Fe65, decreases the expression of two acetylcholinesterase genes
Author(s) -
Bimonte Marida,
Gianni Davide,
Allegra Danilo,
Russo Tommaso,
Zambrano Nicola
Publication year - 2004
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1111/j.1460-9568.2004.03611.x
Subject(s) - caenorhabditis elegans , signal transducing adaptor protein , biology , gene , acetylcholinesterase , mutant , microbiology and biotechnology , amyloid precursor protein , gene expression , transcription factor , regulation of gene expression , cytosol , genetics , biochemistry , alzheimer's disease , enzyme , medicine , disease , pathology
The molecular adaptor Fe65 is one of the cytosolic ligands of the Alzheimer's β‐amyloid precursor protein (APP), and this complex is believed to play important roles in mammalian cells. Upon cleavage of APP by specific processing activities, the complex between Fe65 and the APP intracellular domain (AICD) translocates to the nucleus. Experimental evidence suggests that the Fe65‐AICD complex regulates gene transcription. In Caenorhabditis elegans the orthologue of the Fe65 gene, feh‐1 , regulates pharyngeal activity. In fact, the rate of pharyngeal contraction is increased following transient or stable suppression of the feh‐1 gene expression. Here we show that the increased contraction rate of the pharynx in feh‐1 mutant worms is associated to decreased acetylcholinesterase activity. The decreased activity is accompanied by reduced expression of ace‐1 and ace‐2 transcripts, coding for the two major acetylcholinesterase activities in the nematode. These results indicate a target of the regulatory mechanisms based on the Fe65‐APP complex that could be relevant for the pathogenesis of Alzheimer's disease.