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After administering the equivalent of 1 g of eicosapentaenoic acid (EPA) in four different chemical forms, the kinetics of EPA incorporation into plasma triglycerides (TG) were compared by gas liquid chromatography on a capillary column following separation of the lipid fraction by thin layer chromatography. EPA incorporation into plasma TG was markedly smaller and later when EPA was administered as an ethyl ester rather than as EPA free fatty acid, EPA arginine salt or 1,3-dioctanoyl-2-eicosapentaenoyl glycerol (2-EPA). Our results and the data in the literature are compatible with the hypothesis that 2-EPA is absorbed with minimum hydrolysis and escapes random distribution between the other positions of the glycerol molecule during the absorption process.

Besides eosinophils, inflammatory processes in asthma are characterized by an infiltration of inflammatory cells, including mononuclear phagocytes, such as alveolar macrophages (AM) and blood monocytes, in the airways. Monocyte activation has been observed in the blood after exercise or allergen-induced asthma. Stimulated AM in chronic and stable asthmatic patients have been shown to release oxygen species. We thus investigated the intensity of the activation of monocytes from 18 asthmatic patients compared with 18 healthy subjects. Oxygen species release was analyzed for monocytes in suspension by chemiluminescence using a luminometer and for monocytes maintained in adherence using conventional assay and video imaging camera. Circulating blood monocytes in suspension from asthmatic patients and control subjects showed the same baseline free radical release. Monocytes in suspension from asthmatic patients were more stimulatable by PMA: specifically, monocytes release more H2O and peaks of O2-. are sooner; moreover, peaks of total free radical release are higher, and this plateau is sustained. Compared with monocytes from control subjects, those from asthmatic patients evaluated after adherence show a higher baseline for O2-. and higher total free radical release. Monocytes from asthmatic patients spontaneously release more O2-. over time in nonstimulated cells and release more O2-. with PMA stimulation; they show the same peak level total free radical release as those from control subjects after stimulation. SOD activity analysis on adherent monocytes was lower in asthmatic compared with control subjects. These data show that monocytes from asthmatic patients were activated compared with control monocytes.(ABSTRACT TRUNCATED AT 250 WORDS)

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Background Very few cancer patients were enrolled in COVID-19 vaccine studies. In order to address this gap of knowledge, real world studies are mandatory. Aim of this study was to assess both humoral and cellular response after a mRNA vaccination schedule. Patients and methods Eighty-eight consecutive cancer patients treated with PD-1/PD-L1 inhibitors were enrolled from the beginning of the vaccination campaign for frail patients. Blood samples for humoral and cell-mediated immune response evaluation were obtained before vaccination (T0), before the second administration (T1) and 21 days after the second dose (T2). The primary end-point was the evaluation of the percentage of participants showing a significant increase in SARS-CoV-2 specific T cells, measured by an ELISPOT assay, after the second dose of BNT162b2 vaccine. The proportion of patients who reached the primary endpoint is computed together with its exact binomial 95% confidence interval (95%CI). Results In SARS-CoV-2 naïve subjects, Spike-specific T-cell response was almost undetectable at T0 (median 0.0 IFNγ SFU/million PBMC IQR 0-7.5) and significantly increased at T1 and T2 (median 15.0 IFNγ SFU/million PBMC 25th-75th 0-40 vs 90 IFNγ SFU/million PBMC 25th-75th 32.5-224; respectively) (p<0.001). Focusing on naïve and experienced SARS-CoV-2 subjects no differences were reported both in terms of CD4 and CD8-specific T-cell response, suggesting that BNT162b2 is able to elicit both adaptive responses after complete vaccination schedule, regardless previous SARS-CoV-2 exposure. The level of SARS-CoV-2 NT Abs was low at T1 in SARS-CoV-2 naïve subjects [median 1:5 (IQR 1:5-1:20)] but reached a significantly higher median 1:80 (25th-75th 1:20-1:160) at T2 (p<0.0001). Moreover no COVID-19 cases were documented throughout the period of study. Conclusions Our data have demonstrated that the administration of a full course of BNT162b2 vaccine elicited a sustained immune response against SARS-CoV-2 regardless to the type of cancer and/or the type of ICIs.