An analysis of the peptide composition of a 'light' peptide fraction of cerebrolysin

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Objective. To analyze the peptide composition of a light peptide fraction of cerebrolysin. Material and methods. Mass spectrometry (MS) with orbital ion traps and modern de novo MS-sequencing algorithms was performed. Results. The amino acid sequences of 14 635 peptides corresponding to the 1643 porcine proteome neuronal proteins are identified. An analysis of the human proteome annotation shows that these peptides can mimic the corresponding human peptides. In particular, 405 peptide fragments correspond to 300 known biologically active peptides, including fragments of antibacterial peptides (defensins, histatins), immunomodulatory (granulin, manserin) and vasoactive (endothelin, VIP) peptides. At the same time, 8953 of 14 635 peptides can modulate the activity of 275 human signaling proteins, including kinases CDK1, CDK2, TGFBR2, GSK3, MTOR, pro-apoptotic caspases CASP1, CASP3 and CASP6 etc. The results confirm the presence of Leu- and Met-enkephalins, fragments of neuropeptide orexin, neuropeptide VF, galanin and nerve growth factor that have a neurotrophic effect. Conclusion. The results of a proteomic study of the peptide composition of cerebrolysin indicate the widest range of molecular mechanisms responsible for the clinical efficacy of this drug.

Keywords:

algorithms for big data analysis

Authors:

V.G. Zgoda

Orekhovich Research Institute of Biomedical Chemistry, Moscow, Russia

O.V. Tikhonova

Endocrinology Research Centre, Moscow, Russia

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