Suggested Supplements Hesperidin – Page 6

Pathways and genes most likely to be affected

1. APP processing and amyloid pathology

People with DS carry three copies of APP and develop Alzheimer-type plaques decades earlier than the general population. In APP/PS1 and 5xFAD mice, hesperidin.

•  reduces Aβ deposition and plaque-associated APP,

•  shifts processing toward the non-amyloidogenic pathway (ADAM10 up, BACE1 down),

•  lowers microglial activation around plaques. sciencedirect.com

These actions directly address a core chromosome-21 dosage problem.

2. Oxidative stress and mitochondrial bioenergetics

Trisomy 21 produces chronic oxidative stress (SOD1 imbalance, APP-derived fragments, mitochondrial defects). Hesperidin:

•  scavenges ROS and up-regulates the Nrf2/Keap1/ARE axis, increasing SOD, catalase, GPx and HO-1,

•  restores mitochondrial membrane potential, electron-transport-chain complexes I–IV, and ATP production,

•  supports PGC-1α-mediated mitochondrial biogenesis (via AMPK/SIRT1). link.springer.com

These effects overlap with those already shown for resveratrol, hydroxytyrosol and 7,8-dihydroxyflavone in DS neural progenitors.

3. Neuroinflammation

Hesperidin suppresses NF-κB, RAGE, TNF-α, IL-1β, IL-6, COX-2 and MMP-2/9. Chronic low-grade inflammation and interferon hyperactivity are well-documented in DS; damping this axis is a common mechanism of other polyphenols tested in DS models.

4. Neurogenesis, BDNF signaling and synaptic plasticity

DS brains show reduced hippocampal neurogenesis (partly DYRK1A-driven). Hesperidin:

•  stimulates neural-stem-cell proliferation via AMPK/CREB,

•  raises BDNF/TrkB signaling,

•  improves memory in Alzheimer models. mdpi.com

Similar restoration of neurogenesis has been reported for EGCG, apigenin and polydatin in Ts65Dn mice.

5. Possible direct interaction with other chromosome-21 proteins

A 2024 network-pharmacology study docked the closely related flavanone naringenin (and apigenin) to four DS-relevant proteins:

•  DYRK1A (naringenin –9.3 kcal/mol),

•  CBS (naringenin –8.0 kcal/mol),

•  APP,

•  ETS2. pmc.ncbi.nlm.nih.gov

Several other flavonoids (fisetin, kaempferol, luteolin, quercetin, EGCG) are confirmed DYRK1A inhibitors. Hesperidin itself has not been assayed against DYRK1A, but the structural class makes modest kinase modulation plausible.

6. Additional intersecting pathways

•  GSK-3β (tau phosphorylation and mitochondrial regulation)

•  PI3K/Akt

•  autophagy/mTOR

•  anti-apoptotic signaling (Bax/Bcl-2, caspase-3)