Another study tested the effects induced by a mixture of four main catechins found in green tea (epicatechin – EC, epigallocatechin – EGC, epigallocatechin gallate – EGCG, epicatechin gallate – GCG), as well as each one alone, on neutrophils isolated from healthy subjects. The catechin compounds induced anti-inflammatory effect (reduction of IL-1β and IL-6, TNF-α, HOCl synthesis and mieloperoxisase), together with the stimulation of antioxidant enzyme activities and Nrf2, along calcium release as well as increased phagocytic capacity, thus proving anti-inflammatory and immunomodulatory actions (Marinovic et al., 2015). In a separate study, EGCG reduced ICAM-1, NF-ĸB and IĸB expressions and reduced ROS levels upon TNF-α-induced inflammation in human retinal pigment epithelial cells. The results suggest the possible therapeutic involvement of EGCG in blocking TNF-α-mediated eye inflammation (Thichanpiang and Wongprasert, 2015). Moreover, in a study evaluating the effect of epicatechin and catechin on arachidonic acid-activated platelets and, respectively, on platelet-HUVEC interaction, the tested compounds induced a reduction of sICAM1, sVCAM1, and sE-selectin levels, as well as an increase of NO bioavailability, proving an anti-inflammatory effect and the ability to counteract endothelial dysfunction, but only when platelets were harvested from peripheral artery disease patients and not from healthy subjects (Carnevale et al., 2014).