BDNF

Definition

Brain-Derived Neurotrophic Factor (BDNF) is a protein belonging to the neurotrophin family that plays a critical role in neuronal survival, growth, differentiation, and synaptic plasticity. It is one of the most abundant neurotrophins in the central nervous system and is essential for learning, memory formation, and cognitive function.

Mechanism and Signalling

BDNF exerts its effects primarily through binding to tropomyosin receptor kinase B (TrkB), activating downstream signalling cascades including PI3K/Akt, MAPK/ERK, and PLCγ pathways. These pathways promote neuronal survival, dendritic branching, and long-term potentiation (LTP) — the cellular basis of memory formation.

BDNF is synthesised as a precursor protein (proBDNF) that is cleaved to mature BDNF. Interestingly, proBDNF and mature BDNF have opposing effects: mature BDNF promotes neuronal survival via TrkB, while proBDNF can trigger apoptosis through the p75NTR receptor.

Relevance to Peptide Research

Several peptides are studied for their ability to modulate BDNF levels. Semax and Selank, developed at the Russian Academy of Sciences, have been investigated for upregulating BDNF expression in preclinical models. Dihexa is studied for its neurotrophic properties through a related but distinct mechanism (HGF/c-Met pathway). BPC-157 has also shown effects on BDNF expression in certain injury models. BDNF levels are frequently used as a biomarker endpoint in neuropeptide research.

Related Peptides

Peptide profiles that reference “BDNF” in their research content.