GSE131283
RNA-seq of different brain tissue areas of Trrap conditional knockout Mus musculus
The acetylation levels of histones and other proteins change during aging and have been linked to neurodegeneration. Here we show that deletion of the histone acetyltransferase (HAT) co-factor Trrap specifically impairs the function of the transcription factor Sp1, reduces its stability and causes a decrease in histone acetylation at Sp1 target genes. Modulation of Sp1 function by Trrap acts as a hub regulating multiple processes involved in neuron and neural stem cells function and maintenance including microtubule dynamics and the Wnt signaling pathway. Consistently, Trrap conditional mutants exhibit all hallmarks of neurodegeneration including dendrite retraction and axonal swellings, neuron death, astrogliosis, microglia activation, demyelination and decreased adult neurogenesis. Our results uncovered a novel functional network, essential to prevent neurodegeneration, and involving the specific regulation of Sp1 transcription factor and its downstream targets by Trrap-HAT. Overall design: 16 samples in total: 8 cortex (4 Trrap Fl/+; Camk2-Cre tg, 4 Trrap Fl/Fl; Camk2-Cre tg), 8 striatum (4 Trrap Fl/+; Camk2-Cre tg, 4 Trrap Fl/Fl; Camk2-Cre tg)