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THE ROLE OF NEUTROPHILS AND THEIR APOPTOSIS IN THERE SOLUTION OF INFLAMMATION

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Pavlyshyn H., Sarapuk I.
Puls Uczelni
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2015
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issue 4
18-25
EN
Inflammation, as a part of the body’s immune response, is present in the progression of most diseases. Neutrophils form the first line of the defense against invading pathogens and subsequently play a prominent role in the resolution of inflammation. They have a protective function as they release antibacterial enzymes and generate reactive oxygen species. Neutrophils are able to regulate the inflammatory reaction by undergoing apoptosis. Apoptosis, then, facilitates cellular homeostasis ( immune defense), promotes the elimination of activated cells of the immune system, and can act as a major pathogenetic link of an inflammation process, defining its character. This review highlights the mechanisms of apoptosis, the influence of external and internal factors and infectious agents (viruses, extracellular and intracellular microorganisms) on the enactment of neutrophil programmed death and the resolution of inflammation.
PL
Stan zapalny jako część odpowiedzi immunologicznej organizmu jest patologiczną podstawą większości chorób. Granulocyty obojętnochłonne tworzą pierwszą linię obrony przed inwazją patogenów i odgrywają znaczącą rolę w zwalczaniu stanu zapalnego. Realizują one funkcję ochronną poprzez uwalnianie enzymów przeciwbakteryjnych i wytwarzanie wolnych rodników. Granulocyty obojętnochłonne są w stanie regulować reakcję zapalną poprzez apoptozę. Apoptoza zapewnia homeostazę komórek, ochronę immunologiczną, nasila eliminację aktywowanych komórek układu odpornościowego oraz może stanowić znaczący związek patogenetyczny z procesem zapalnym, określając jego charakter. W artykule zwrócono uwagę na mechanizmy apoptozy, wpływ czynników zewnętrznych i wewnętrznych oraz czynników zakaźnych (wirusy, wewnątrzkomórkowe i zewnątrzkomórkowe mikroorganizmy) na realizację zaprogramowanej śmierci granulocytów obojętnochłonnych i zwalczanie stanu zapalnego.
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Immunoaging – the effect of age on serum levels of NET biomarkers in men: a pilot study

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Garley M., Omeljaniuk W. J., Motkowski R., Ratajczak-Wrona W., Jabłońska E., Filipkowski D., Charkiewicz A. E.
International Journal of Occupational Medicine and Environmental Health
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2023
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vol. 36
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issue 3
333-348
EN
Objectives The study aimed to evaluate the impact of aging on the formation of neutrophil extracellular traps (NETs). The impaired formation of NETs is the cause of an abnormal innate immune response. Material and Methods The study included a total of 45 healthy male subjects of different age groups. Whole blood was collected from the subjects, and the concentration of myeloperoxidase (MPO), the main biocidal protein in NETs, was determined in serum using ELISA. The serum levels of circulating free DNA (cfDNA), which are the structural basis of NETs, were also measured by fluorescence. In addition, the white blood cell count was determined, whole blood smear was evaluated, and the neutrophillymphocyte ratio was calculated. The variations in the levels of NET biomarkers were analyzed in different age groups. Results The low levels of MPO (243.70 ng/ml) and cfDNA (6.24 ng/100 μl) in boys indicated neutrophil insufficiency for NETosis in children. A progressive increase in the levels of MPO and cfDNA with age was observed among adolescents (420.91, p = 0.04; 13.55, p = 0.03, respectively), with the highest level noted in the healthy adult group (466.58, p = 0.01; 14.07, p = 0.01, respectively). The levels of the studied parameters were comparable in adolescents and young adults, which proved that the NETosis process was appropriate and suggested the attainment of neutrophil maturity for the release of NETs in adolescence. The levels of MPO and cfDNA were low in older men (225.46, p < 0.01; 5.19, p < 0.01, respectively) indicating impaired NET formation. Conclusions Data on the generation of NETs in different age groups obtained in this study can allow a better understanding of the ontogenesis of the immune system in terms of the course of NETosis, and also indicate the need to support nonspecific responses in children and adults. Further research should be performed to determine the possibility of regulating the NETosis process.
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The effect of hymenoptera venom immunotherapy on neutrophils, interleukin 8 (IL-8) and interleukin 17 (IL-17)

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Pałgan K., Żbikowska-Gotz M., Zacniewski R., Bartuzi Z.
International Journal of Occupational Medicine and Environmental Health
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2020
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vol. 33
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issue 6
811-817
EN
ObjectivesVenom immunotherapy (VIT) is an effective treatment method and is addressed to patients with a history of an anaphylactic reaction to Hymenoptera stings. However, the immunological mechanisms of protection have not been explained yet. The objective of this study was to analyze neutrophils, interleukin 8 (IL-8) and interleukin 17 (IL-17) before and after the initial phase of the immunotherapy.Material and MethodsOverall, 40 individuals, including 20 wasp venom sensitized and 20 bee venom sensitized patients, were included in the study. The patients had had a history of severe allergic reactions type III and IV according to Mueller’s classification. An ultra-rush VIT protocol was used in this study. The concentration of serum IL-8 and IL-17A was determined using the ELISA enzymatic method.ResultsThe authors demonstrated a significant rise in the IL-8 level after the immunotherapy, compared to baseline (14.9 vs. 24.7, p < 0.05). The rise in the neutrophils level was also noticeable but proved to be barely out of the range of statistical significance (4.3 vs. 5.0, p = 0.06). The shift in IL-17A was negligent and not statistically significant in the paired samples t-test (1.6 vs. 1.5, p = 0.34)ConclusionsVenom immunotherapy induces neutrophils and IL-8 activity after 2 days. After the desensitization, the level of IL-17A did not change.
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