FBXO32 and Cachexia: However, since the magnitude of repression by d.n.FoxO was still considerably greater for both atrogin-1 and MuRF1 in the diaphragm than in the TA, these data suggest that additional transcription factors perhaps more active in limb muscle also play a role in atrogin-1 and MuRF1 transcription during cancer cachexia, which has been reported previously [13].