Study summary · research use only
Effects of short peptides on lymphocyte chromatin in senile subjects
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
In this study of leukocytes from people aged 75-88 years, the authors examined synthetic short peptides (Vilon, Epithalon, Livagen, Prostamax, Cortagen) on ribosome gene activity, heterochromatin melting parameters, structural heterochromatin polymorphism of chromosomes 1, 9, and 16, and facultative heterochromatin variability. They report that all peptides were associated with activation of ribosome genes, decondensation of densely packed chromatin, and release of genes described as repressed by age-related condensation. Epithalon, Livagen, and Prostamax were associated with decondensation of chromosome 1 pericentromeric chromatin, and Epithalon and Livagen with changes in chromosome 9. The authors interpret the peptides as activating heterochromatin regions in senile subjects.
Abstract
Effects of synthetic short peptides (Vilon, Epithalon, Livagen, Prostamax, and Cortagen) on activity of ribosome genes, parameters of common heterochromatin melting, polymorphism of structural heterochromatin (C segments) of chromosomes 1, 9, and 16, and variability of facultative heterochromatin were studied in leukocytes of subjects aged 75-88 years. All the studied peptides induced activation of ribosome genes, decondensation of densely packed chromatin fibrils, and release of genes repressed as a result of age-specific condensation of the cellular euchromatin regions (deheterochromatinization of facultative chromatin). Treatment with Epithalon, Livagen, and Prostamax led to decondensation of chromosome 1 pericentromeric structural chromatin, while Epithalon and Livagen treatment led to changes in chromosome 9 as well. Hence, short peptides activate heterochromatin and heterochromatinized regions of cell chromosomes in senile subjects.
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