Purpose: Post-prandial phase is characterized by enhanced oxidative stress but the underlying mechanism is unclear. We investigated if gut-derived lipopolysaccharide (LPS) is implicated in this phenomenon and the effect of extra virgin olive oil (EVOO) in patients with impaired fasting glucose (IFG). Methods: This is a randomized cross-over interventional study including 30 IFG patients, to receive a lunch with or without 10 g of EVOO. Serum LPS, Apo-B48, markers of oxidative stress such as oxidized LDL (oxLDL) and soluble Nox2-derived peptide (sNox2-dp), a marker of nicotinamide-adenine-dinucleotide-phosphate oxidase isoform Nox2 activation, and plasma polyphenols were determined before, 60 and 120 min after lunch. Results: In patients not given EVOO oxidative stress as assessed by sNox2-dp and oxLDL significantly increased at 60 and 120 min concomitantly with an increase of LPS and Apo-B48. In these patients, changes of LPS were correlated with Apo-B48 (Rs = 0.542, p = 0.002) and oxLDL (Rs = 0.463, p = 0.010). At 120 min, LPS (β − 15.73, p < 0.001), Apo-B48 (β − 0.14, p = 0.004), sNox2-dp (β − 5.47, p = 0.030), and oxLDL (β − 42.80, p < 0.001) significantly differed between the two treatment groups. An inverse correlation was detected between polyphenols and oxLDL (R − 0.474, p < 0.005). In vitro study showed that LPS, at the same concentrations found in the human circulation, up-regulated Nox2-derived oxidative stress via interaction with Toll-like receptor 4. Conclusions: Post-prandial phase is characterized by an oxidative stress-related inflammation potentially triggered by LPS, a phenomenon mitigated by EVOO administration.

Gut-derived lipopolysaccharides increase post-prandial oxidative stress via Nox2 activation in patients with impaired fasting glucose tolerance: effect of extra-virgin olive oil / Carnevale, R; Pastori, D; Nocella, C; Cammisotto, V; Bartimoccia, S; Novo, M; Del Ben, M; Farcomeni, A; Angelico, F; Violi, F. - In: EUROPEAN JOURNAL OF NUTRITION. - ISSN 1436-6207. - (2018), pp. 1-9. [10.1007/s00394-018-1718-x]

Gut-derived lipopolysaccharides increase post-prandial oxidative stress via Nox2 activation in patients with impaired fasting glucose tolerance: effect of extra-virgin olive oil

Carnevale R
Primo
;
Pastori D;Nocella C;Cammisotto V;Bartimoccia S;Novo M;Del Ben M;Farcomeni A;Angelico F;Violi F
2018

Abstract

Purpose: Post-prandial phase is characterized by enhanced oxidative stress but the underlying mechanism is unclear. We investigated if gut-derived lipopolysaccharide (LPS) is implicated in this phenomenon and the effect of extra virgin olive oil (EVOO) in patients with impaired fasting glucose (IFG). Methods: This is a randomized cross-over interventional study including 30 IFG patients, to receive a lunch with or without 10 g of EVOO. Serum LPS, Apo-B48, markers of oxidative stress such as oxidized LDL (oxLDL) and soluble Nox2-derived peptide (sNox2-dp), a marker of nicotinamide-adenine-dinucleotide-phosphate oxidase isoform Nox2 activation, and plasma polyphenols were determined before, 60 and 120 min after lunch. Results: In patients not given EVOO oxidative stress as assessed by sNox2-dp and oxLDL significantly increased at 60 and 120 min concomitantly with an increase of LPS and Apo-B48. In these patients, changes of LPS were correlated with Apo-B48 (Rs = 0.542, p = 0.002) and oxLDL (Rs = 0.463, p = 0.010). At 120 min, LPS (β − 15.73, p < 0.001), Apo-B48 (β − 0.14, p = 0.004), sNox2-dp (β − 5.47, p = 0.030), and oxLDL (β − 42.80, p < 0.001) significantly differed between the two treatment groups. An inverse correlation was detected between polyphenols and oxLDL (R − 0.474, p < 0.005). In vitro study showed that LPS, at the same concentrations found in the human circulation, up-regulated Nox2-derived oxidative stress via interaction with Toll-like receptor 4. Conclusions: Post-prandial phase is characterized by an oxidative stress-related inflammation potentially triggered by LPS, a phenomenon mitigated by EVOO administration.
2018
Extra-virgin olive oil; lipopolysaccharide; oxidative stress; medicine (miscellaneous); nutrition and dietetics
01 Pubblicazione su rivista::01a Articolo in rivista
Gut-derived lipopolysaccharides increase post-prandial oxidative stress via Nox2 activation in patients with impaired fasting glucose tolerance: effect of extra-virgin olive oil / Carnevale, R; Pastori, D; Nocella, C; Cammisotto, V; Bartimoccia, S; Novo, M; Del Ben, M; Farcomeni, A; Angelico, F; Violi, F. - In: EUROPEAN JOURNAL OF NUTRITION. - ISSN 1436-6207. - (2018), pp. 1-9. [10.1007/s00394-018-1718-x]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1168862
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