Aberrant tryptophan metabolism in stromal cells is associated with mesenteric fibrosis in small intestinal neuroendocrine tumors.
Anela BlaževićAnand M IyerMarie-Louise F Van VelthuysenJohannes HoflandPeter M van KoestveldGaston J H FranssenRichard A FeeldersMarina ZajecTheo M LuiderWouter W de HerderLeo J HoflandPublished in: Endocrine connections (2022)
We found a decreased expression of tryptophan and serotonin-metabolizing enzymes in the stroma in patients with MF, most notably in the mesenteric stroma. This might account for the increased profibrotic potential of serotonin and explain the variability in the development of SI-NET-associated fibrotic complications.