Investigating the Anti-Inflammatory Activity of Juglans regia Fresh Fruit Extract

TL;DR

This study explores the anti-inflammatory effects of a fresh fruit extract from Juglans regia in animal models and through computational analysis.

Contribution

The study demonstrates the anti-inflammatory potential of Juglans regia extract in both acute and chronic inflammation models.

Findings

The extract significantly reduced licking time in the formalin test, particularly in the late phase.

Quercetin showed the best docking score for AChE, while neochlorogenic acid and ellagic acid had strong scores for BChE.

Abscisic acid exhibited high binding affinity for the glucocorticoid receptor.

Abstract

Numerous research works have tried to evaluate the correlation between inflammation and the onset of prostate cancer. Given the in vitro antioxidant power and the anti-proliferative effects on human prostate cancer cells shown by a Juglans regia L. fresh fruit extract, the aim of this work was the evaluation of its potential in the acute and chronic inflammatory states in vivo, revealing a strong anti-inflammatory activity. In the zymosan-induced edema formation assay, a light and non-significant edema reduction was shown. On the contrary, in the zymosan-induced thermal hyperalgesia assay, the reversion of hyperalgesia after the extract administration was determined. Moreover, in the formalin test, the extract caused a significant decrease in the licking time caused by the aldehyde, especially in the late phase. In silico, quercetin showed the best fit into the enzymatic pocket of AChE (docking score: −11.306 Kcal/mol). Neochlorogenic acid and ellagic acid gave the best docking scores on BChE (−10.292 Kcal/mol and −10.054 Kcal/mol, respectively). Abscisic acid showed a high binding affinity for the glucocorticoid receptor. Finally, quercetin and abscisic acid were quantified to complete the data by HPLC-DAD, giving 0.246 ± 0.003 mg/g of dried extract and 0.036 ± 0.004 mg/g of dried extract, respectively.

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