Excretion Pathways Excretion mechanisms for both peptides remain incompletely characterized: Renal filtration likely represents primary elimination route for peptide fragments Hepatic metabolism may contribute to peptide degradation and clearance No evidence of significant biliary excretion in available studies Pharmacokinetic studies in renal or hepatic impairment models are absent from literature The rapid systemic clearance of both peptides contrasts with prolonged downstream effects on growth hormone and IGF-1, indicating that direct peptide presence is not required for sustained biological activity once pituitary signaling cascades are initiated
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Vinicius Cruzat, Marcelo Macedo Rogero, Kevin Noel Keane, Rui Curi, Philip Newsholme (2018 Oct) Glutamine: Metabolism and Immune Function, Supplementation and Clinical Translation
In lab and animal work, KPV has shown anti-inflammatory effects in the gut
However, a few studies have suggested that these actions of the trefoil peptides may also contribute to the movement of cancer cells, known as metastasis, in cell models