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Best Research Peptides for Alzheimer's Research: Mechanism Comparison
Semax BDNF upregulation via TrkB activation Synaptic plasticity, dendritic spine formation 10–100 μM (in vitro), 50–500 μg/kg (in vivo) Stable in PBS for 7 days at 4°C; degrades rapidly above pH 8.0 Best choice for studying synaptic repair and long-term potent
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- Semax
- BDNF upregulation via TrkB activation
- Synaptic plasticity, dendritic spine formation
- 10–100 μM (in vitro), 50–500 μg/kg (in vivo)
- Stable in PBS for 7 days at 4°C; degrades rapidly above pH 8.0
- Best choice for studying synaptic repair and long-term potentiation in hippocampal models; cross-reactivity with melanocortin and opioid receptors requires control conditions
- Selank
- IL-6/TNF-α suppression, ACE inhibition
- Neuroinflammation, microglial activation
- 1–50 μM (in vitro), 100–1000 μg/kg (in vivo)
- Half-life under 30 minutes in serum; requires fresh preparation every 4 hours for continuous exposure studies
- Ideal for acute inflammation models; short half-life limits utility in chronic dosing protocols without osmotic pump delivery
- MOTS-c
- AMPK activation, mitochondrial ATP synthesis
- Glucose metabolism, oxidative phosphorylation
- 1–25 μM (in vitro), 5–15 mg/kg (in vivo)
- Requires DMSO co-solvent above 5 mM; stable for 6 months at −20°C in lyophilised form
- Best mechanistic tool for studying metabolic dysfunction; DMSO cytotoxicity requires careful titration in primary neuron cultures
- P21
- CNTF receptor agonism, adult neurogenesis
- Dentate gyrus neurogenesis, progenitor cell proliferation
- 0.1–10 μM (in vitro), 0.5–2 mg/kg (in vivo)
- Forms aggregates above 2 mM unless stored at acidic pH (4.5–5.0); incompatible with neutral aCSF without dilution
- Cleanest signal for isolating neurogenesis effects; low solubility and aggregation risk demand protocol optimisation before large-scale studies