Semax is a synthetic heptapeptide (Met Glu His Phe Pro Gly Pro) developed as an analog of the ACTH(4 10) fragment and engineered for increased stability. It has been used in experimental models to investigate neuropeptide driven changes in gene expression and signaling pathways, including studies evaluating effects on neurotrophin related markers such as BDNF in vitro and in vivo. Semax is commonly used in research focused on peptide mediated neuromodulatory mechanisms and transcriptional responses in nervous system models.

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