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A neurogenetic disorder characterized by severe intellectual deficit and distinct facial dysmorphic features.
UBE3A regulates HDAC6 stability; UBE3A loss leads to HDAC6 accumulation and excessive α-tubulin deacetylation, impairing kinesin-1 binding and axonal transport. Selective HDAC6 inhibitors (ACY-1215) restore tubulin acetylation while kinesin light chain modulators enhance cargo binding.
Metformin activates AMPK which phosphorylates ULK1 and Beclin-1, enhancing autophagy flux. In AS, loss of UBE3A ubiquitin ligase function leads to protein accumulation; enhanced autophagy could compensate by clearing misfolded proteins via LC3-II/p62 pathway activation.
ASOs targeting UBE3A antisense transcript (UBE3A-ATS) unsilence paternal UBE3A while Gastrodia elata polysaccharides enhance neuronal survival through vanillin-mediated activation of PI3K/AKT pathway and reduction of ER stress via GRP78 upregulation.
In AS, UBE3A loss leads to stabilization of TOPORS protein, which acts as p53 SUMO E3 ligase, increasing p53 sumoylation and transcriptional activity. Small molecule disruption of TOPORS-p53 interaction reduces pro-apoptotic gene expression (BAX, PUMA, NOXA).
Scutellarin acts as positive allosteric modulator of GABA_A receptors containing α2 and α3 subunits, which are predominantly extrasynaptic. This enhances tonic inhibition without affecting synaptic transmission, addressing the GABA/glutamate imbalance characteristic of UBE3A deficiency.
Bacosides A and B from Brahmi enhance CREB phosphorylation and nuclear translocation, potentially upregulating maternal UBE3A expression through CRE-binding sites in the UBE3A promoter region. Bacoside-induced BDNF signaling may also activate mTOR pathway to enhance synaptic protein synthesis.