Effects of Almond Consumption on Innate and Adaptive Immune System

In the last months, with the whole world grappling with COVID-19 and because like in many other diseases, the host immune system determines the progress of COVID-19 and the severity, there is a frantic race for finding treatment strategies based on current knowledge until effective vaccine is developed. Therefore, the modulation of inflammatory response and cytokine production using immunonutrition makes more sense than ever. The almond is a tree nut, rich in fiber, vitamin E, biotin, minerals such as magnesium and phytonutrients, specifically flavonoids, plant sterols, phenolic acids and could have a potential beneficial role in immune system. However, beyond its beneficial role and down-lowering specific circulating cytokines in low-grade chronic inflammatory diseases, the role of almond on both innate and adaptive immune system has not been explored. The investigators hypothesize that regular consumption of almonds will contribute to strengthening the immune system through the modulation of specific circulating miRNAs. The primary objective is to evaluate the effect of almond consumption on the maturation of innate lymphoid cells (ILCs). Secondarily, the insvestigators aims to: 1. Examine the effect of regular consumption of almonds in the context of a Western-style diet on: a) innate immune system through the analysis of other blood cell populations including monocytes and lymphocyte's subsets (T-cells, B-cells). b) adaptive immune system assessed by: b.1) circulating inflammatory markers and b.2) ex-vivo ability for peripheral blood mononuclear cell (PBMC) to produce cytokines. c) circulating miRNAs, focusing in immune-related miRNAs. 2. To investigate whether changes in miRNAs mediate the effect of almonds on ILCs activity and the other innate and adaptive immune system indicators analysed. The expected results would enhance understanding of the role of almonds in immune function, to establish the basis of new research for the promotion of the health benefits of nuts in immune-related diseases and facilitate the use of personalized nutrition to improve human health.