Effect of glucocorticoids, insulin and a growth promoting tripeptide on the biosynthesis of plasma proteins in serum-free hepatocyte cultures.
Fouad. F M FM; Abd-El-Fattah. M M; Scherer. R R; Ruthenstroth-Bauer. G G
Key Findings
- Cortisol and dexamethasone increase fibrinogen synthesis ~2.5‑fold while suppressing albumin and alpha‑lipoprotein production.
- Insulin broadly inhibits the biosynthesis of most plasma proteins, with the exception of complement proteins and transferrin.
- Low‑concentration GHK‑Cu (Gly‑His‑Lys) modestly elevates levels of alpha‑lipoprotein, alpha‑1‑macroglobulin, and haptoglobin in rat hepatocyte cultures.
Practical Outcomes
- The study suggests that GHK‑Cu can slightly influence liver protein output, but the effect is small and observed only in isolated rat cells. For biohackers, this provides a hint that low‑dose GHK‑Cu might affect inflammation‑related proteins, yet there is no clear dosage or protocol to apply in humans. Until human data emerge, the peptide’s impact on plasma protein synthesis should be considered exploratory rather than actionable.
Summary
In a lab study using rat liver cells, researchers found that stress hormones (cortisol or dexamethasone) boost production of fibrinogen (a clotting protein) but lower albumin and certain lipoproteins. Insulin, on the other hand, generally shuts down the making of most plasma proteins except a few like complement and transferrin. When a tiny amount of the peptide GHK‑Cu (Gly‑His‑Lys) was added, it caused a modest rise in a few proteins such as alpha‑lipoprotein, alpha‑1‑macroglobulin, and haptoglobin.
Abstract
The effect of cortisol, dexamethasone, insulin and a liver cell growth promoting tripeptide on the secretion of plasma proteins into the medium of rat hepatocytes in monolayer cultures was studied. Cortisol and dexamethasone resulted in equal to or approximately 2.5-fold increase in the fibrinogen synthesis with general suppression of albumin and alpha-lipoprotein synthesis. On the other hand, insulin inhibited the biosynthesis of most plasma proteins except for the complement system and transferrin. Concentrations of alpha-lipoprotein, alpha-1-macroglobulin and haptoglobin were moderately elevated when the tripeptide Gly-His-Lys was applied in low concentration.
Study Information
pubmed
1981
1981-04-01T00:00:00.000Z
10.1515/znc-1981-3-429
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