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A rare sex chromosome number anomaly disorder characterized, genetically, by the presence of an extra X and Y chromosome in males and, clinically, by tall stature, dysfunctional testes associated with infertility and insufficient testosterone production, cognitive, affective and social functioning impairments, global developmental delay, and an increased risk of congenital malformations.
Oligomeric proanthocyanidins (OPCs) from grape seed extract cross the blood-brain barrier and enhance synaptic plasticity through activation of ERK1/2 and CREB signaling pathways. They increase hippocampal BDNF expression and promote dendritic spine formation while protecting against oxidative stress through Nrf2 pathway activation, potentially improving cognitive deficits in 48,XXYY syndrome.
Ginkgolide B, isolated from Ginkgo biloba, selectively antagonizes platelet-activating factor (PAF) receptors and inhibits NMDA receptor overactivation through modulation of glycine binding sites. This dual mechanism protects against excitotoxicity-induced synaptic loss and promotes BDNF-mediated synaptic plasticity, potentially ameliorating cognitive deficits associated with the extra X chromosomes in 48,XXYY syndrome.
Curcumin inhibits NF-κB activation through IKKβ suppression and reduces microglial activation, while piperine enhances curcumin bioavailability by 2000% through CYP450 inhibition. This combination targets the chronic neuroinflammation associated with chromosomal aneuploidy by reducing pro-inflammatory cytokines IL-1β, TNF-α, and IL-6 while promoting anti-inflammatory IL-10 expression.
Withanoside IV, a bioactive glycowithanolide from Withania somnifera, enhances steroidogenic enzyme expression through activation of steroidogenic factor 1 (SF-1) and upregulation of StAR protein. It also modulates the hypothalamic-pituitary-gonadal axis by increasing GnRH receptor sensitivity, potentially addressing hypogonadism common in 48,XXYY syndrome patients.
Metformin activates AMPK signaling which phosphorylates and activates SIRT1, leading to enhanced histone deacetylation and improved X-chromosome inactivation (XCI) efficiency. By promoting proper heterochromatin formation on supernumerary X chromosomes, metformin may reduce gene dosage imbalances that contribute to 48,XXYY syndrome phenotypes.
Yohimbine and corynanthine from African Pausinystalia johimbe bark selectively block presynaptic α2-adrenoreceptors, leading to increased norepinephrine and dopamine release in prefrontal cortex. This mechanism may improve attention deficits and executive dysfunction common in 48,XXYY syndrome by enhancing catecholaminergic neurotransmission without the cardiovascular risks of synthetic stimulants.
MicroRNA-140-5p is dysregulated in sex chromosome aneuploidies and directly targets MECP2 and other X-linked genes involved in neurodevelopment. Developing antagomiRs or mimics to normalize miR-140-5p levels could restore proper gene dosage compensation and serve as both a diagnostic biomarker and therapeutic intervention for 48,XXYY syndrome.