Gaucher disease (GD) is the most common lysosomal storage disorder worldwide, caused by a deficiency of the enzyme β-glucosidase acidase (GCase). This deficiency leads to inefficient catabolism of the sphingolipid glucosylceramide (GC), resulting in its accumulation in macrophages and the formation of Gaucher cells. GD is characterised by organomegaly, chronic inflammation and bone disorders. Although the molecular mechanisms are poorly understood, recent studies indicate defective phagocytosis of apoptotic cells, associated with low levels of the polyamine putrescine, essential for the transcription of IL-10, the major anti-inflammatory cytokine. Research with Lactiplantibacillus probiotics (Lb) has demonstrated their ability to induce the activity of the enzyme N(1)-spermidine spermidine acetyltransferase (SSAT), which is key in the catabolism of polyamines. In addition, Lb has been shown to enhance phagocytosis in mononuclear cells and modulate the polarisation of M1/M2 cytokines by supplying the PI3K/Akt pathway. To analyse whether Lb can restore IL-10 levels in the context of GD and its relationship with SSAT, microvesicles were obtained from L. plantarum biofilm DSM 20174. The effects of Lb on immune regulation were assessed by detecting IL-1β, IL-6, IL-10 and TNF-α in a model Gaucher cell line, and significant alterations in SSAT expression and activity were observed.
La malattia di Gaucher (GD) è la malattia da accumulo lisosomiale più comune al mondo, causata da una carenza dell'enzima β-glucosidasi acidasi (GCase). Questa carenza porta a un catabolismo inefficiente dello sfingolipide glucosilceramide (GC), con conseguente accumulo nei macrofagi e formazione di cellule di Gaucher. La GD è caratterizzata da organomegalia, infiammazione cronica e disturbi ossei. Sebbene i meccanismi molecolari siano poco conosciuti, studi recenti indicano una fagocitosi difettosa delle cellule apoptotiche, associata a bassi livelli di poliammina putrescina, essenziale per la trascrizione di IL-10, la principale citochina antinfiammatoria. Le ricerche condotte con i probiotici Lactiplantibacillus (Lb) hanno dimostrato la loro capacità di indurre l'attività dell'enzima N(1)-spermidina spermidina acetiltransferasi (SSAT), che è fondamentale nel catabolismo delle poliammine. Inoltre, è stato dimostrato che la Lb aumenta la fagocitosi nelle cellule mononucleari e modula la polarizzazione delle citochine M1/M2 alimentando la via PI3K/Akt. Per analizzare se la Lb può ripristinare i livelli di IL-10 nel contesto della GD e la sua relazione con la SSAT, sono state ottenute microvescicole dal biofilm di L. plantarum DSM 20174. Gli effetti della Lb sulla regolazione immunitaria sono stati valutati attraverso la rilevazione di IL-1β, IL-6, IL-10 e TNF-α in una linea cellulare modello di Gaucher e sono state osservate alterazioni significative nell'espressione e nell'attività di SSAT.
EFFETTO DEL LACTIPLANTIBACILLUS PLANTARUM SULLA PRODUZIONE DI IL-10 IN CELLULE GAUCHER: REGOLAZIONE ENZIMATICA
CASTILLO OCHOA, ANNIE CECILIA
2025
Abstract
Gaucher disease (GD) is the most common lysosomal storage disorder worldwide, caused by a deficiency of the enzyme β-glucosidase acidase (GCase). This deficiency leads to inefficient catabolism of the sphingolipid glucosylceramide (GC), resulting in its accumulation in macrophages and the formation of Gaucher cells. GD is characterised by organomegaly, chronic inflammation and bone disorders. Although the molecular mechanisms are poorly understood, recent studies indicate defective phagocytosis of apoptotic cells, associated with low levels of the polyamine putrescine, essential for the transcription of IL-10, the major anti-inflammatory cytokine. Research with Lactiplantibacillus probiotics (Lb) has demonstrated their ability to induce the activity of the enzyme N(1)-spermidine spermidine acetyltransferase (SSAT), which is key in the catabolism of polyamines. In addition, Lb has been shown to enhance phagocytosis in mononuclear cells and modulate the polarisation of M1/M2 cytokines by supplying the PI3K/Akt pathway. To analyse whether Lb can restore IL-10 levels in the context of GD and its relationship with SSAT, microvesicles were obtained from L. plantarum biofilm DSM 20174. The effects of Lb on immune regulation were assessed by detecting IL-1β, IL-6, IL-10 and TNF-α in a model Gaucher cell line, and significant alterations in SSAT expression and activity were observed.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.14242/300929
URN:NBN:IT:UNIUD-300929