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Wacht G, Poirot A, Charles AL, Radosavljevic M, Uring-Lambert B, de Blay F, Geny B, Bahram S, Barnig C. FACS - based isolation of human eosinophils allows purification of high quality RNA. J Immunol Methods 2018; 463:47-53. [PMID: 30217720 DOI: 10.1016/j.jim.2018.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/18/2018] [Accepted: 09/06/2018] [Indexed: 12/25/2022]
Abstract
Here we extensively describe a FACS-based protocol for isolating intact non-stained human eosinophils from peripheral blood; a stop forward from our recently published initial study. This method of purification could be accomplished in <3 h with only small volumes of whole blood necessary, even in healthy subjects generally exhibiting low levels of circulating eosinophils. Eosinophil activation during the isolation steps appeared to be minimal and this purification procedure yielded high quality RNA. Moreover, these FACS-isolated eosinophils had prolonged viability in culture and were suitable for further activation assays.
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Affiliation(s)
- Guillaume Wacht
- Laboratoire Central d'Immunologie, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Nouvel Hôpital Civil, 67091 Strasbourg Cedex, France; EA 3072, Fédération de Médecine Translationnelle de Strasbourg, University of Strasbourg, 67085 Strasbourg Cedex, France
| | - Anh Poirot
- Pulmonology Unit, Department of Chest Disease, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg University Hospital, 67091 Strasbourg Cedex, France
| | - Anne-Laure Charles
- EA 3072, Fédération de Médecine Translationnelle de Strasbourg, University of Strasbourg, 67085 Strasbourg Cedex, France
| | - Mirjana Radosavljevic
- Laboratoire Central d'Immunologie, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Nouvel Hôpital Civil, 67091 Strasbourg Cedex, France; INSERM UMR S_1109, ImmunoRhumatologie Moléculaire, Labex Transplantex, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, University de Strasbourg, 67085 Strasbourg, France
| | - Béatrice Uring-Lambert
- Laboratoire Central d'Immunologie, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Nouvel Hôpital Civil, 67091 Strasbourg Cedex, France
| | - Frédéric de Blay
- EA 3072, Fédération de Médecine Translationnelle de Strasbourg, University of Strasbourg, 67085 Strasbourg Cedex, France; Pulmonology Unit, Department of Chest Disease, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg University Hospital, 67091 Strasbourg Cedex, France
| | - Bernard Geny
- EA 3072, Fédération de Médecine Translationnelle de Strasbourg, University of Strasbourg, 67085 Strasbourg Cedex, France; Physiology Unit, Department of Chest Disease, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg University Hospital, 67091 Strasbourg Cedex, France
| | - Seiamak Bahram
- Laboratoire Central d'Immunologie, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Nouvel Hôpital Civil, 67091 Strasbourg Cedex, France; INSERM UMR S_1109, ImmunoRhumatologie Moléculaire, Labex Transplantex, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, University de Strasbourg, 67085 Strasbourg, France
| | - Cindy Barnig
- Laboratoire Central d'Immunologie, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Nouvel Hôpital Civil, 67091 Strasbourg Cedex, France; Pulmonology Unit, Department of Chest Disease, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg University Hospital, 67091 Strasbourg Cedex, France; INSERM UMR S_1109, ImmunoRhumatologie Moléculaire, Labex Transplantex, Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg, University de Strasbourg, 67085 Strasbourg, France.
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Percopo CM, Dyer KD, Killoran KE, Rosenberg HF. Isolation of human eosinophils: microbead method has no impact on IL-5 sustained viability. Exp Dermatol 2009; 19:467-9. [PMID: 19758339 DOI: 10.1111/j.1600-0625.2009.00974.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND/PURPOSE In a recent issue of Experimental Dermatology (18, 2009, 654), Schefzyk et al. concluded that multi-antibody eosinophil isolation (Miltenyi) should be abandoned, as differential purity was minimal, and eosinophils underwent accelerated apoptosis when compared with those isolated with traditional anti-CD16 microbeads. Our intent was to investigate the universality of these findings. METHODS We isolated eosinophils from normal donor granulocyte packs using two methods, and evaluated purity, viability and annexin-V/propidium-iodide staining. RESULTS Purity was substantially greater when multi-antibody isolation was used for eosinophil isolation from granulocyte packs (98% vs 69%). No differential survival was detected when eosinophils were maintained in culture with or without interleukin-5. CONCLUSIONS Multi-antibody eosinophil isolation represents a substantial advantage over anti-CD-16 microbeads when isolating large numbers of eosinophils from concentrated leucocyte preparations. No differential survival was observed. While appropriate consideration of methods is always crucial, multi-antibody eosinophil isolation should not be abandoned completely.
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Sale R, Sabatini F, Silvestri M, Serpero L, Petecchia L, Rossi GA. Concentration-dependent activity of mometasone furoate and dexamethasone on blood eosinophils isolated from atopic children: modulation of Mac-1 expression and chemotaxis. Int Immunopharmacol 2005; 4:1687-96. [PMID: 15454120 DOI: 10.1016/j.intimp.2004.07.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2004] [Accepted: 07/30/2004] [Indexed: 11/25/2022]
Abstract
Treatment of asthma with corticosteroids results in downregulation of eosinophilic airway inflammation. We evaluated in vitro the activity of an "inhaled" corticosteroid, mometasone furoate (MF), and of a "systemic" corticosteroid, dexamethasone (DEX), on eosinophil functions, i.e. adhesion molecule expression and cell chemotaxis. Partially purified blood eosinophils were obtained from 18 asthmatic subjects sensitized to house dust mites. The expression of the macrophage antigen (Mac)-1 (CD11b/CD18) was measured by specific monoclonal antibody (mAb) staining and flow cytometry analysis at baseline or after stimulation with N-formyl-methionyl-leucyl-phenylalanine (fMLP) or with recombinant human (rh) granulocyte macrophage-colony stimulating factor (GM-CSF) plus a mAb anti-human (ah) IgE low affinity receptor [FcepsilonRII or CD23]. Cell chemotaxis toward the complement fragment 5a (C5a) or rh interleukin (IL)-5 was evaluated in Boyden microchambers by light microscopy. Eosinophils showed a significant increase in Mac-1 expression after activation with fMLP or with rh GM-CSF plus ah CD23 mAbs (p<0.05, each comparison) and a remarkable chemotactic response to both C5a or rh IL-5 (p<0.001, each comparison). To test the inhibitory activity of MF and DEX on eosinophil functions, the cells were preincubated for 3 h with four concentrations (0.1, 1, 10 and 100 nM) of each of the two drugs, before being activated by fMLP or by rh GM-CSF plus ah CD23 mAbs or tested with C5a or with rh IL-5. Independently of the stimulus used, both Mac-1 expression and eosinophil migration were effectively downregulated by preincubation with MF or DEX at 1, 10 and 100 nM (p<0.05). The inhibitory activity on cell chemotaxis in response to both C5a or with rh IL-5 was higher for MF than DEX, but only at the highest concentration tested (p<0.05, each comparison). These data demonstrate that concentrations of MF similar to those obtained in vivo are highly effective in inhibiting eosinophil functions involved in airway inflammation.
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Affiliation(s)
- Rosa Sale
- Pulmonary Disease Unit, G. Gaslini Institute, Genoa, 16147 Genoa, Italy
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Blaylock MG, Lipworth BJ, Dempsey OJ, Duncan CJA, Lee DKC, Lawrie A, Douglas JG, Walsh GM. Eosinophils from patients with asthma express higher levels of the pan-leucocyte receptor CD45 and the isoform CD45RO. Clin Exp Allergy 2003; 33:936-41. [PMID: 12859450 DOI: 10.1046/j.1365-2222.2003.01697.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Eosinophils and their secreted mediators are heavily implicated as effector cells in asthma and other allergic diseases. Comparisons were made between expression of CD45, CD45RA, CD45RB and CD45RO by eosinophils from asthmatic patients and non-asthmatic atopic and non-atopic, non-asthmatic control subjects. METHODS Twenty-seven patients with asthma and 33 control subjects were recruited for the study. Eosinophil expression of CD45, CD45RA, CD45RB and CD45RO was established by immunostaining and flow cytometry was performed on whole leucocyte samples. Eosinophil apoptosis in response to CD45 and CD45 isoform monoclonal antibody (mAb)-dependent receptor ligation was assessed by binding of annexin V and flow cytometry. RESULTS Eosinophils from patients with asthma expressed significantly (P<0.05) higher levels of pan-CD45 and CD45RO compared with eosinophils from non-asthmatic, non-atopic subjects. No significant correlations were found between expression of either pan-CD45 or CD45RO and the degree of symptoms in the asthmatic patients as defined by lung function (FEV1 and FEF25-75) and methacholine PD20. Increased expression of pan-CD45 or CD45RO did not appear to be a consequence of the atopic phenotype. Higher expression of pan-CD45 or CD45RO by eosinophils from asthmatic patients was not associated with greater sensitivity to CD45 and CD45RO mAb receptor ligation-induced eosinophil apoptosis. CONCLUSION Higher expression of CD45 and CD45RO by eosinophils from asthmatic patients appeared to be a consequence of asthma rather than atopy and further supports a role for activated eosinophils in asthma.
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Affiliation(s)
- M G Blaylock
- Department of Medicine and Therapeutics, Institute of Medical Sciences, University of Aberdeen Medical School, Aberdeen, UK
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Terada N, Hamano N, Kim WJ, Hirai K, Nakajima T, Yamada H, Kawasaki H, Yamashita T, Kishi H, Nomura T, Numata T, Yoshie O, Konno A. The kinetics of allergen-induced eotaxin level in nasal lavage fluid: its key role in eosinophil recruitment in nasal mucosa. Am J Respir Crit Care Med 2001; 164:575-9. [PMID: 11520718 DOI: 10.1164/ajrccm.164.4.2009046] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Eotaxin (CCL11) is a potent eosinophil chemoattractant belonging to the C-C chemokine. To evaluate the role of eotaxin in eosinophilic inflammation in nasal mucosa, we investigated the levels of eosinophil chemoattractants in nasal lavage fluids obtained after antigen challenge, compared with eosinophil counts and eosinophil protein X (EPX) levels. In subjects with allergic rhinitis, allergen challenge led to parallel increases in eosinophil counts, levels of EPX, and eotaxin concentrations in nasal lavage fluid. The levels of eotaxin in lavage samples showed strong correlation with lavage levels of eosinophil counts and EPX. Normal subjects had few, if any, eosinophils and EPX as well as the measured parameters in their nasal lavage fluids before and after antigen challenge. In our experiments of eosinophil endothelial transmigration (TEM) assay using the nasal microvascular endothelial cells, eotaxin showed the most potent effect among various eosinophil chemoattractants. In addition, treatment of eosinophils with anti-CCR-3 mAb significantly blocked eosinophil TEM induced by homogenate of nasal mucosa. These results indicate that eotaxin has an important role in eosinophil-dependent inflammation in nasal mucosa and suggest that blocking eotaxin or CCR-3 might be useful for new therapeutic tools of allergic rhinitis.
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MESH Headings
- Allergens/adverse effects
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- Case-Control Studies
- Chemokine CCL11
- Chemokine CCL5/analysis
- Chemokine CCL5/immunology
- Chemokines, CC
- Chemotactic Factors, Eosinophil/analysis
- Chemotactic Factors, Eosinophil/immunology
- Chemotaxis, Leukocyte/drug effects
- Chemotaxis, Leukocyte/immunology
- Cytokines/analysis
- Cytokines/antagonists & inhibitors
- Cytokines/immunology
- Cytokines/metabolism
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/immunology
- Endothelium, Vascular/ultrastructure
- Eosinophils/drug effects
- Eosinophils/immunology
- Humans
- Inflammation
- Leukocyte Count
- Nasal Lavage Fluid/chemistry
- Nasal Lavage Fluid/immunology
- Nasal Mucosa/chemistry
- Nasal Mucosa/cytology
- Nasal Mucosa/drug effects
- Nasal Mucosa/immunology
- Nasal Provocation Tests
- Receptors, CCR3
- Receptors, Chemokine/antagonists & inhibitors
- Rhinitis, Allergic, Seasonal/blood
- Rhinitis, Allergic, Seasonal/drug therapy
- Rhinitis, Allergic, Seasonal/immunology
- Rhinitis, Allergic, Seasonal/pathology
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Affiliation(s)
- N Terada
- Department of Otorhinolaryngology, Chiba University School of Medicine, Chiba, Japan.
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