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Neurobiological research on neuropeptide signalling often involves three research peptides available in the Peptiva catalogue: DSIP, Selank and Semax.
DSIP — a nonapeptide from early neuroendocrine research
DSIP is a short nine-amino-acid neuropeptide first described in the 1970s in research on brain signals. Despite its long history, its exact physiological mechanism has still not been reliably established, and the literature is limited and inconsistent.
Selank — a tuftsin analogue
Selank is a synthetic heptapeptide derived from a short sequence of the immune peptide tuftsin. It is studied mainly in neurobiological models of gene expression, GABAergic signalling and the stress response.
Semax — an ACTH fragment
Semax is a synthetic peptide analogue of a short ACTH fragment, stabilised by an added Pro-Gly-Pro sequence. In the literature it is studied in the context of neurotrophic signalling and ischaemia models.
How these peptides differ in mechanism
Although all three belong to the broader category of neurobiological research materials, their proposed pathways differ: DSIP is studied in the context of neuroendocrine signalling, Selank in the context of GABAergic modulation and gene expression, while Semax is more closely associated with neurotrophic factors such as BDNF. These differences make them interesting for comparative research within the same broader category.
What BDNF is and why it matters in neuroscience
BDNF (brain-derived neurotrophic factor) is a protein that supports neuron survival and promotes growth and differentiation of neurons and synapses. In the research literature BDNF levels are often used as an indicator of neuroplasticity in experimental models. Peptides such as Semax, studied in the context of BDNF signalling, therefore attract attention from researchers working on neuroplasticity and neurodegenerative models, although most of these findings are based on preclinical studies.
Comparative research
Because these peptides belong to the same broader neurobiological category, researchers often compare them — for example Semax and Selank — to distinguish mechanisms of neural signalling.
Related research area
For broader context see the Neuropeptides collection.
This article is intended for general research context and does not constitute medical advice or a recommendation for use in humans or animals.