Vet Med - Czech, 2014, 59(11):543-552 | DOI: 10.17221/7819-VETMED
The impact of pre-analytical treatment and sorting on human neutrophil functionOriginal Paper
- 1 University of Pardubice, Pardubice, Czech Republic
- 2 Faculty of Military Health Sciences, University of Defence Brno, Hradec Kralove, Czech Republic
This study was designed to test the hypothesis that pre-analytical treatment of relatively fragile cells is more important for their viability and function than shear forces and decompression shocks on a flow cytometric sorter. Human neutrophils were enriched using different techniques (sedimentation, hypotonic or ammonium chloride-mediated erythrocyte lysis) and their function was evaluated by measuring their capability of mounting oxidative burst. In contrast to other isolation techniques, neutrophils enriched by spontaneous sedimentation were found to be intact both in terms of their function and relative numbers within the leukocyte population; such preparations were thus run on a FACSAria cell sorter using 70, 85 and 100 µm nozzles and the corresponding internal pressure values. The viability and function of sorted neutrophils with or without subsequent cultivation were re-evaluated using phagocytosis assays. Independent of the nozzle size and internal sorter pressure, the capability of neutrophils of responding to E. coli stimulation was impaired after sorting while phorbol myristate acetate stimulation remained intact. In tested samples, only 20 h incubation of sorted cells confirmed the expected influence of the nozzle size on the sorted cell function. We conclude that pre-analytical treatment is more important for cell function than conditions during sorting.
Keywords: flow cytometry; cell sorting; granulocytes; phagocytosis; oxidative burst
Published: November 30, 2014 Show citation
References
- BD FACS AriaIII User's Guide (2012): http://www.bdbiosciences.com/documents/ BD_ FACSAria_ III_ User_Guide.pdf
- Beliakova-Bethell N, Massanella M, White C, Lada SM, Du P, Vaida F, Blanco J, Spina CA, Woelk CH (2014): The effect of cell subset isolation method on gene expression in leukocytes. Cytometry A 85, 94-104.
Go to original source...
Go to PubMed...
- Berkow RL, Dodson RW (1986): Purification and functional evaluation of mature neutrophils from human bone marrow. Blood 68, 853-860.
Go to original source...
- Carlson GP, Kaneko JJ (1973): Isolation of leukocytes from bovine peripheral blood. Proceedings of the Society for Experimental Biology and Medicine 142, 853-856.
Go to original source...
Go to PubMed...
- de Oliveira-Junior EB, Bustamante J, Newburger PE, Condino-Neto A (2011): The human NADPH oxidase: primary and secondary defects impairing the respiratory burst function and the microbicidal ability of phagocytes. Scandinavian Journal of Immunology 73, 420-427.
Go to original source...
Go to PubMed...
- Dorward DA, Lucas CD, Alessandri AL, Marwick JA, Rossi F, Dransfield I, Haslett C, Dhaliwal K, Rossi AG (2013): Technical advance: autofluorescence-based sorting: rapid and nonperturbing isolation of ultrapure neutrophils to determine cytokine production. Journal of Leukocyte Biology 94, 193-202.
Go to original source...
Go to PubMed...
- Emmendörffer A, Nakamura M, Rothe G, Spiekermann K, Lohmann-Matthes ML, Roesler J (1994): Evaluation of flow cytometric methods for diagnosis of chronic granulomatous disease variants under routine laboratory conditions. Cytometry 18, 147-155.
Go to original source...
Go to PubMed...
- Halasa M, Baskiewicz-Masiuk M, Dabkowska E, Machalinski B (2008): An efficient two-step method to purify very small embryonic-like (VSEL) stem cells from umbilical cord blood (UCB). Folia Histochemica et Cytobiologica 46, 239-243.
Go to original source...
Go to PubMed...
- Hampton MB, Kettle AJ, Winterbourn CC (1988): Inside the neutrophil phagosome: oxidants, myeloperoxidase, and bacterial killing. Blood 92, 3007-3017.
Go to original source...
- Ibrahim SF, van den Engh G (2003): High-speed cell sorting: fundamentals and recent advances. Current Opinion in Biotechnology 14, 5-12.
Go to original source...
Go to PubMed...
- Kalina T, Flores-Montero J, van der Velden VH, MartinAyuso M, Bottcher S, Ritgen M, Almeida J, Lhermitte L, Asnafi V, Mendonca A, de Tute R, Cullen M, Sedek L, Vidriales MB, Perez JJ, te Marvelde JG, Mejstrikova E, Hrusak O, Szczepanski T, van Dongen JJ, Orfao A (2012): EuroFlow standartization of flow cytometer instrument settings and immunophenotyping protocols. Leukemia 26, 1986-2010.
Go to original source...
Go to PubMed...
- Kim D, Kim JY (2014): Anti-CD14 antibody reduces LPS responsiveness via TLR4 internalization in human monocytes. Molecular Immunology 57, 210-215.
Go to original source...
Go to PubMed...
- Lehrer RI, Ganz T, Selsted ME (1988): Oxygen-independent bactericidal systems. Mechanisms and disorders. Hematology/Oncology Clinics of North America 2, 159-169.
Go to original source...
Go to PubMed...
- McCusker C, Warrington R (2011): Primary immunodeficiency. Allergy Asthma and Clinical Immunology 7, Suppl 1, S11.
Go to original source...
Go to PubMed...
- Roos D, de Boer M (1986): Purification and cryopreservation of phagocytes from human blood. Methods in Enzymology 132, 225-243.
Go to original source...
Go to PubMed...
- Stovel RT (1977): The influence of particles on jet breakoff. Journal of Histochemistry and Cytochemistry 25, 813-820.
Go to original source...
Go to PubMed...
- Voltarelli JC (2000): Applications of flow cytometry to hematopoietic stem cell transplantation. Memorias do Instituto Oswaldo Cruz 95, 403-414.
Go to original source...
Go to PubMed...
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