Anti-Myeloperoxidase monoclonal antibody, clone 60B6

Naegleria fowleriproduces a fatal disease called primary amebic meningoencephalitis (PAM), which is characterized by an extensive inflammatory reaction in the CNS. It is known that the immune response is orchestrated mainly by neutrophils, which activate several defense mechanisms in the host, including phagocytosis, the release of different enzymes such as myeloperoxidase (MPO), and the production of neutrophil extracellular traps. However, the mechanisms by which amoebas evade the neutrophil response are still unknown. In this study, we analyzed the ability ofN. fowlerito respond to the stress exerted by MPO. Interestingly, after the interaction of trophozoites with neutrophils, the amoeba viability was not altered; however, ultrastructural changes were observed. To analyze the influence of MPO againstN. fowleriand its participation in free radical production, we evaluated its enzymatic activity, expression, and localization with and without the specific 4-aminobenzoic acid hydrazide inhibitor. The production of oxidizing molecules is the principal mechanism used by neutrophils to eliminate pathogens. In this context, we demonstrated an increase in the production of NO, superoxide anion, and reactive oxygen species; in addition, the overexpression of several antioxidant enzymes present in the trophozoites was quantified. The findings strongly suggest thatN. fowleripossesses antioxidant machinery that is activated in response to an oxidative environment, allowing it to evade the neutrophil-mediated immune response, which may contribute to the establishment of PAM.

The lubricating effect of alumina deposited palm oil was investigated during the end-milling of Inconel 690. Different volume concentration (0.3-1.5%) of alumina was reinforced into palm oil, and experimentally optimized concentration of alumina was selected. Later on, the milling experiments were carried out in Flooded, MQL with palm oil (MPO) and MQL with 0.9% alumina enhanced palm oil (0.9%-MAPO) medium, which confirmed that 0.9%-MAPO reduced the tool wear by 19.35%, and 10.71% respectively as compared to flooded and MPO medium. SEM and EDX analysis demonstrated that adhesion and abrasion were the principal tool wear mechanism in all lubricating environments. Further analysis confirmed that 0.9%-MAPO medium effectively formed a surface protecting film on the machined surface.