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Methodologies and tools to shed light on erythrophagocytosis. Biochimie 2022; 202:166-179. [PMID: 35952949 DOI: 10.1016/j.biochi.2022.07.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/26/2022] [Accepted: 07/28/2022] [Indexed: 11/20/2022]
Abstract
Red blood cells (RBC) are the most abundant circulating cell of the human body. RBC are constantly exposed to multiple stresses in the circulation, leading to molecular and structural impairments and death. The physiological process of RBC senescence or ageing is referred to as eryptosis. At the end of their lifespan, aged RBC are recognized and removed from the blood by professional phagocytes via a phenomenon called erythrophagocytosis (EP); the phagocytosis of RBC. Some genetic and acquired diseases can influence eryptosis, thereby affecting RBC lifespan and leading to hemolytic anemia. In some diseases, such as diabetes and atherosclerosis, eryptosis and EP can participate in disease progression with both professional and non-professional phagocytes. Therefore, investigating the process of EP in vivo and in vitro, as well as in different cell types, will not only contribute to the understanding of the physiological steps of EP, but also to the deciphering of the specific mechanisms involving RBC and EP that underlie certain pathologies. In this review, the process of EP is introduced and the different methods for studying EP are discussed together with examples of the experimental procedures and materials required.
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Caielli S, Cardenas J, de Jesus AA, Baisch J, Walters L, Blanck JP, Balasubramanian P, Stagnar C, Ohouo M, Hong S, Nassi L, Stewart K, Fuller J, Gu J, Banchereau JF, Wright T, Goldbach-Mansky R, Pascual V. Erythroid mitochondrial retention triggers myeloid-dependent type I interferon in human SLE. Cell 2021; 184:4464-4479.e19. [PMID: 34384544 PMCID: PMC8380737 DOI: 10.1016/j.cell.2021.07.021] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/05/2021] [Accepted: 07/19/2021] [Indexed: 02/08/2023]
Abstract
Emerging evidence supports that mitochondrial dysfunction contributes to systemic lupus erythematosus (SLE) pathogenesis. Here we show that programmed mitochondrial removal, a hallmark of mammalian erythropoiesis, is defective in SLE. Specifically, we demonstrate that during human erythroid cell maturation, a hypoxia-inducible factor (HIF)-mediated metabolic switch is responsible for the activation of the ubiquitin-proteasome system (UPS), which precedes and is necessary for the autophagic removal of mitochondria. A defect in this pathway leads to accumulation of red blood cells (RBCs) carrying mitochondria (Mito+ RBCs) in SLE patients and in correlation with disease activity. Antibody-mediated internalization of Mito+ RBCs induces type I interferon (IFN) production through activation of cGAS in macrophages. Accordingly, SLE patients carrying both Mito+ RBCs and opsonizing antibodies display the highest levels of blood IFN-stimulated gene (ISG) signatures, a distinctive feature of SLE.
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Affiliation(s)
- Simone Caielli
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA.
| | | | - Adriana Almeida de Jesus
- Translational Autoinflammatory Diseases Section, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Jeanine Baisch
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | | | | | - Preetha Balasubramanian
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | - Cristy Stagnar
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | - Marina Ohouo
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | - Seunghee Hong
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | - Lorien Nassi
- Texas Scottish Rite Hospital for Children, Dallas, TX, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Katie Stewart
- Texas Scottish Rite Hospital for Children, Dallas, TX, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Julie Fuller
- Texas Scottish Rite Hospital for Children, Dallas, TX, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jinghua Gu
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA
| | | | - Tracey Wright
- Texas Scottish Rite Hospital for Children, Dallas, TX, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Raphaela Goldbach-Mansky
- Translational Autoinflammatory Diseases Section, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Virginia Pascual
- Drukier Institute for Children's Health, Weill Cornell Medicine, New York, NY, USA; Department of Pediatrics, Weill Cornell Medicine, New York, NY, USA.
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Haschka D, Petzer V, Kocher F, Tschurtschenthaler C, Schaefer B, Seifert M, Sopper S, Sonnweber T, Feistritzer C, Arvedson TL, Zoller H, Stauder R, Theurl I, Weiss G, Tymoszuk P. Classical and intermediate monocytes scavenge non-transferrin-bound iron and damaged erythrocytes. JCI Insight 2019; 4:98867. [PMID: 30996139 PMCID: PMC6538345 DOI: 10.1172/jci.insight.98867] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/14/2019] [Indexed: 12/12/2022] Open
Abstract
Myelomonocytic cells are critically involved in iron turnover as aged RBC recyclers. Human monocytes are divided in 3 subpopulations of classical, intermediate, and nonclassical cells, differing in inflammatory and migratory phenotype. Their functions in iron homeostasis are, however, unclear. Here, we asked whether the functional diversity of monocyte subsets translates into differences in handling physiological and pathological iron species. By microarray data analysis and flow cytometry we identified a set of iron-related genes and proteins upregulated in classical and, in part, intermediate monocytes. These included the iron exporter ferroportin (FPN1), ferritin, transferrin receptor, putative transporters of non-transferrin-bound iron (NTBI), and receptors for damaged erythrocytes. Consequently, classical monocytes displayed superior scavenging capabilities of potentially toxic NTBI, which were augmented by blocking iron export via hepcidin. The same subset and, to a lesser extent, the intermediate population, efficiently cleared damaged erythrocytes in vitro and mediated erythrophagocytosis in vivo in healthy volunteers and patients having received blood transfusions. To summarize, our data underline the physiologically important function of the classical and intermediate subset in clearing NTBI and damaged RBCs. As such, these cells may play a nonnegligible role in iron homeostasis and limit iron toxicity in iron overload conditions. Human classical and intermediate monocytes mediate clearance of non-transferrin-bound iron and erythrophagocytosis.
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Affiliation(s)
| | | | | | | | - Benedikt Schaefer
- Department of Internal Medicine I, Medical University of Innsbruck, Innsbruck, Austria
| | | | | | | | | | - Tara L Arvedson
- Department of Oncology, Amgen Inc., Thousand Oaks, California, USA
| | - Heinz Zoller
- Department of Internal Medicine I, Medical University of Innsbruck, Innsbruck, Austria
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Stachurska A, Król T, Trybus W, Szary K, Fabijańska-Mitek J. 3D visualization and quantitative analysis of human erythrocyte phagocytosis. Cell Biol Int 2016; 40:1195-1203. [DOI: 10.1002/cbin.10671] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 08/14/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Anna Stachurska
- Department of Immunohaematology; Centre of Postgraduate Medical Education; Marymoncka 99/103 01-813 Warsaw Poland
| | - Teodora Król
- Department of Cell Biology and Electron Microscopy; Institute of Biology; The Jan Kochanowski University; Świętokrzyska 15 25-406 Kielce Poland
| | - Wojciech Trybus
- Department of Cell Biology and Electron Microscopy; Institute of Biology; The Jan Kochanowski University; Świętokrzyska 15 25-406 Kielce Poland
| | - Karol Szary
- Department of Molecular Physics; Institute of Physics; The Jan Kochanowski University; Świętokrzyska 15 25-406 Kielce Poland
| | - Jadwiga Fabijańska-Mitek
- Department of Immunohaematology; Centre of Postgraduate Medical Education; Marymoncka 99/103 01-813 Warsaw Poland
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Fujita S, Kashiwagi H, Tomimatsu T, Ito S, Mimura K, Kanagawa T, Endo M, Miyoshi T, Okamura Y, Tani Y, Tomiyama Y, Kimura T. Expression levels of ABCG2 on cord red blood cells and study of fetal anemia associated with anti-Jra. Transfusion 2016; 56:1171-81. [DOI: 10.1111/trf.13515] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 12/22/2015] [Accepted: 12/30/2015] [Indexed: 01/01/2023]
Affiliation(s)
| | | | | | - Shoichi Ito
- Tohoku Block Blood Center, Japanese Red Cross; Miyagi
| | | | | | | | - Tomomitsu Miyoshi
- Department of Integrative Physiology, Graduate School of Medicine; Osaka University; Osaka
| | - Yasushi Okamura
- Department of Integrative Physiology, Graduate School of Medicine; Osaka University; Osaka
| | - Yoshihiko Tani
- Kinki Block Blood Center, Japanese Red Cross; Osaka Japan
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Gallo V, Skorokhod OA, Schwarzer E, Arese P. Simultaneous determination of phagocytosis of Plasmodium falciparum-parasitized and non-parasitized red blood cells by flow cytometry. Malar J 2012; 11:428. [PMID: 23259636 PMCID: PMC3546840 DOI: 10.1186/1475-2875-11-428] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 10/30/2012] [Indexed: 12/31/2022] Open
Abstract
Background Severe falciparum malaria anaemia (SMA) is a frequent cause of mortality in children and pregnant women. The most important determinant of SMA appears to be the loss of non-parasitized red blood cells (np-RBCs) in excess of loss of parasitized (p-) RBCs at schizogony. Based on data from acute SMA where excretion of haemoglobin in urine and increased plasma haemoglobin represented respectively less than 1% and 0.5% of total Hb loss, phagocytosis appears to be the predominant mechanism of removal of np- and p-RBC. Estimates indicate that np-RBCs are cleared in approximately 10-fold excess compared to p-RBCs. An even larger removal of np-RBCs has been described in vivax malaria anaemia. Estimates were based on two single studies both performed on neurosyphilitic patients who underwent malaria therapy. As the share of np-RBC removal is likely to vary between wide limits, it is important to assess the contribution of both np- and p-RBC populations to overall RBC loss, and disclose the mechanism of such variability. As available methods do not discriminate between the removal of np- vs p-RBCs, the purpose of this study was to set up a system allowing the simultaneous determination of phagocytosis of p- and np-RBC in the same sample. Methods and Results Phagocytosis of p- and np-RBCs was quantified in the same sample using double-labelled target cells and the human phagocytic cell-line THP-1, pre-activated by TNF and IFNγ to enhance their phagocytic activity. Target RBCs were double-labelled with fluorescent carboxyfluorescein-succinimidyl ester (CF-SE) and the DNA label ethidium bromide (EB). EB, a DNA label, allowed to discriminate p-RBCs that contain parasitic DNA from the np-RBCs devoid of DNA. FACS analysis of THP-1 cells fed with double-labelled RBCs showed that p- and np-RBCs were phagocytosed in different proportions in relation to parasitaemia. Conclusions The assay allowed the analysis of phagocytosis rapidly and with low subjective error, and the differentiation between phagocytosed p- and np-RBCs in the same sample. The presented method may help to analyse the factors or conditions that modulate the share of np-RBC removal in vitro and in vivo and lead to a better understanding of the pathogenesis of SMA.
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Affiliation(s)
- Valentina Gallo
- Department of Genetics, Biology and Biochemistry, University of Torino, Torino, Italy
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Giarratana MC, Marie T, Darghouth D, Douay L. Biological validation of bio-engineered red blood cell productions. Blood Cells Mol Dis 2012; 50:69-79. [PMID: 23040561 DOI: 10.1016/j.bcmd.2012.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 09/10/2012] [Accepted: 09/10/2012] [Indexed: 01/05/2023]
Abstract
The generation in vitro of cultured red blood cells (cRBC) could become an alternative to classical transfusion products. However, even when derived from healthy donors, the cRBC generated in vitro from hematopoietic stem cells may display alterations resulting from a poor controlled production process. In this context, we attempted to monitor the quality of the transfusion products arising from new biotechnologies. For that purpose, we developed an in vitro erythrophagocytosis (EP) test with the murine fibroblast cell line MS-5 and human macrophages (reference method). We evaluated 38 batches of cRBC, at the stage of reticulocyte, generated from CD34(+) cells isolated from placental blood or by leukapheresis. We showed that (i) the EP test performed with the MS-5 cell line was sensitive and can replace human macrophages for the evaluation of cultured cells. (ii) The EP tests revealed disparities among the batches of cRBC. (iii) The viability of the cells (determined by calcein-AM test), the expression of CD47 (antiphagocytosis receptor) and the externalization of phosphatidylserine (PS, marker of phagocytosis) were not critical parameters for the validation of the cRBC. (iv) Conversely, the cell deformability determined by ektacytometry was inversely correlated with the intensity of the phagocytic index. Assuming that the culture conditions directly influence the quality of the cell products generated, optimization of the production mode could benefit from the erythrophagocytosis test.
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Affiliation(s)
- Marie-Catherine Giarratana
- UPMC Univ Paris 06, UMR_S938 CDR Saint-Antoine, Prolifération et Différentiation des Cellules Souches, Paris, France
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Gottlieb Y, Topaz O, Cohen LA, Yakov LD, Haber T, Morgenstern A, Weiss A, Chait Berman K, Fibach E, Meyron-Holtz EG. Physiologically aged red blood cells undergo erythrophagocytosis in vivo but not in vitro. Haematologica 2012; 97:994-1002. [PMID: 22331264 DOI: 10.3324/haematol.2011.057620] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The lifespan of red blood cells is terminated when macrophages remove senescent red blood cells by erythrophagocytosis. This puts macrophages at the center of systemic iron recycling in addition to their functions in tissue remodeling and innate immunity. Thus far, erythrophagocytosis has been studied by evaluating phagocytosis of erythrocytes that were damaged to mimic senescence. These studies have demonstrated that acquisition of some specific individual senescence markers can trigger erythrophagocytosis by macrophages, but we hypothesized that the mechanism of erythrophagocytosis of such damaged erythrocytes might differ from erythrophagocytosis of physiologically aged erythrocytes. DESIGN AND METHODS To test this hypothesis we generated an erythrocyte population highly enriched in senescent erythrocytes by a hypertransfusion procedure in mice. Various erythrocyte-aging signals were analyzed and erythrophagocytosis was evaluated in vivo and in vitro. RESULTS The large cohort of senescent erythrocytes from hypertransfused mice carried numerous aging signals identical to those of senescent erythrocytes from control mice. Phagocytosis of fluorescently-labeled erythrocytes from hypertransfused mice injected into untreated mice was much higher than phagocytosis of labeled erythrocytes from control mice. However, neither erythrocytes from hypertransfused mice, nor those from control mice were phagocytosed in vitro by primary macrophage cultures, even though these cultures were able to phagocytose oxidatively damaged erythrocytes. CONCLUSIONS The large senescent erythrocyte population found in hypertransfused mice mimics physiologically aged erythrocytes. For effective erythrophagocytosis of these senescent erythrocytes, macrophages depend on some features of the intact phagocytosing tissue for support.
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Affiliation(s)
- Yehonatan Gottlieb
- Laboratory for Molecular Nutrition, Faculty of Biotechnology and Food Engineering. Technion. Technion City, Haifa, Israel
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Bastian M, Holsteg M, Hanke-Robinson H, Duchow K, Cussler K. Bovine Neonatal Pancytopenia: is this alloimmune syndrome caused by vaccine-induced alloreactive antibodies? Vaccine 2011; 29:5267-75. [PMID: 21605614 PMCID: PMC7126856 DOI: 10.1016/j.vaccine.2011.05.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 05/06/2011] [Accepted: 05/07/2011] [Indexed: 02/02/2023]
Abstract
Bovine Neonatal Pancytopenia (BNP) is a new emerging disease observed since 2007 in Germany and neighbouring countries. The syndrome affects newborn calves and is characterized by pancytopenia, severe bleeding and high lethality. So far, a causative role of infectious or toxic agents has been ruled out. Instead, the syndrome is induced after ingestion of colostrum, the first milk that supplies the calf with maternal antibodies. In analogy to similar diseases in humans it has therefore been postulated that BNP is caused by alloreactive, maternal antibodies. There is a striking association between BNP and a previous vaccination of the respective dams with a particular vaccine against Bovine Virus Diarrhoea (BVD). This association has led to a suspension of the marketing authorisation for the vaccine, by the European Commission. The current study investigates the role of this vaccine in the pathogenesis of BNP. By flow cytometry we were able to demonstrate that sera of BNP dams (dams that gave birth to a BNP calf) harbour alloreactive antibodies binding to surface antigens on bovine leukocytes. A significantly weaker alloreactivity was observed with sera of non-BNP dams that have been vaccinated with the same vaccine but delivered healthy calves. No binding was seen with non-BVD-vaccinated control cows and animals that were vaccinated with other inactivated BVD vaccines so far not associated with BNP. The binding is functionally relevant, because opsonization of bovine leukocytes with alloantibodies led to an elevated cytophagocytosis by bovine macrophages. To test whether the vaccine induces alloreactive antibodies two strategies were employed: Guinea pigs were vaccinated with a panel of commercially available BVD-vaccines. Only the incriminated vaccine induced antibodies binding surface antigens on bovine leukocytes. Additionally, two calves were repeatedly vaccinated with the suspected vaccine and the development of alloreactivity was monitored. In dependence of the number of booster immunizations the induction of alloreactive antibodies could be observed. Finally, by affinity purification we were able to directly demonstrate that BNP associated alloantibodies cross react with the bovine kidney cell line used for vaccine production. Together this provides strong evidence that this particular BVD vaccine has the potential to induce BNP associated alloantibodies.
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Affiliation(s)
- Max Bastian
- Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse 51-59, D-63225 Langen, Germany.
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Fendel R, Brandts C, Rudat A, Kreidenweiss A, Steur C, Appelmann I, Ruehe B, Schröder P, Berdel WE, Kremsner PG, Mordmüller B. Hemolysis is associated with low reticulocyte production index and predicts blood transfusion in severe malarial anemia. PLoS One 2010; 5:e10038. [PMID: 20386613 PMCID: PMC2850371 DOI: 10.1371/journal.pone.0010038] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Accepted: 02/25/2010] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Falciparum Malaria, an infectious disease caused by the apicomplexan parasite Plasmodium falciparum, is among the leading causes of death and morbidity attributable to infectious diseases worldwide. In Gabon, Central Africa, one out of four inpatients have severe malarial anemia (SMA), a life-threatening complication if left untreated. Emerging drug resistant parasites might aggravate the situation. This case control study investigates biomarkers of enhanced hemolysis in hospitalized children with either SMA or mild malaria (MM). METHODS AND FINDINGS Ninety-one children were included, thereof 39 SMA patients. Strict inclusion criteria were chosen to exclude other causes of anemia. At diagnosis, erythrophagocytosis (a direct marker for extravascular hemolysis, EVH) was enhanced in SMA compared to MM patients (5.0 arbitrary units (AU) (interquartile range (IR): 2.2-9.6) vs. 2.1 AU (IR: 1.3-3.9), p<0.01). Furthermore, indirect markers for EVH, (i.e. serum neopterin levels, spleen size enlargement and monocyte pigment) were significantly increased in SMA patients. Markers for erythrocyte ageing, such as CD35 (complement receptor 1), CD55 (decay acceleration factor) and phosphatidylserine exposure (annexin-V-binding) were investigated by flow cytometry. In SMA patients, levels of CD35 and CD55 on the red blood cell surface were decreased and erythrocyte removal markers were increased when compared to MM or reconvalescent patients. Additionally, intravascular hemolysis (IVH) was quantified using several indirect markers (LDH, alpha-HBDH, haptoglobin and hemopexin), which all showed elevated IVH in SMA. The presence of both IVH and EVH predicted the need for blood transfusion during antimalarial treatment (odds ratio 61.5, 95% confidence interval (CI): 8.9-427). Interestingly, this subpopulation is characterized by a significantly lowered reticulocyte production index (RPI, p<0.05). CONCLUSIONS Our results show the multifactorial pathophysiology of SMA, whereby EVH and IVH play a particularly important role. We propose a model where removal of infected and non-infected erythrocytes of all ages (including reticulocytes) by EVH and IVH is a main mechanism of SMA. Further studies are underway to investigate the mechanism and extent of reticulocyte removal to identify possible interventions to reduce the risk of SMA development.
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Affiliation(s)
- Rolf Fendel
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois, United States of America
| | - Christian Brandts
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Department of Medicine, Hematology/Oncology, University of Münster, Münster, Germany
- Department of Medicine, Hematology/Oncology, Goethe-University, Frankfurt, Germany
| | - Annika Rudat
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Department of Medicine, Hematology/Oncology, University of Münster, Münster, Germany
| | - Andrea Kreidenweiss
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Claudia Steur
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
| | - Iris Appelmann
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Department of Medicine, Hematology/Oncology, University of Münster, Münster, Germany
| | - Bettina Ruehe
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
| | - Paul Schröder
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
| | - Wolfgang E. Berdel
- Department of Medicine, Hematology/Oncology, University of Münster, Münster, Germany
| | - Peter G. Kremsner
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Benjamin Mordmüller
- Medical Research Unit, Albert Schweitzer Hospital, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
- * E-mail:
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Gille C, Leiber A, Mundle I, Spring B, Abele H, Spellerberg B, Hartmann H, Poets CF, Orlikowsky TW. Phagocytosis and postphagocytic reaction of cord blood and adult blood monocyte after infection with green fluorescent protein-labeled Escherichia coli and group B Streptococci. CYTOMETRY PART B-CLINICAL CYTOMETRY 2009; 76:271-84. [PMID: 19288547 DOI: 10.1002/cyto.b.20474] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Neonatal sepsis is characterized by an excessive inflammatory response induced by immune cells (monocytes). We investigated the initial stage of monocyte-pathogen interaction, i.e. bacterial ingestion and degradation at the single-cell level, by comparing a new flow cytometric procedure with culture methods. We also examined the hypothesis that, in terms of phagocytosis-induced cell death (PICD), phenotype, or cytokine production, cord blood monocytes (CBMO) differ from monocytes derived from adults (peripheral blood monocytes, PBMO). METHODS Phagocytosis and intracellular degradation were assessed by means of flow cytometry and bacterial cultures of green fluorescent protein-labeled group B Streptococci (GBS) and Escherichia coli. The production of reactive oxygen species (ROS) was measured through luminol-enhanced chemiluminescence. Apoptosis, phenotype, and cytokine production were assessed through flow cytometry. RESULTS Flow cytometry and bacterial cultures showed no difference between phagocytosis and degradation of GBS and E. coli by PBMO and CBMO. A high correlation between both methods was observed. No difference in ROS production was evident. In comparison with PBMO, CBMO apoptosis was lower after exposure to GBS and E. coli. Similarities were found between nonapoptotic monocytes and pro-inflammatory monocytes. CONCLUSIONS PICD is lower in CBMO during the early stages of monocyte-pathogen interaction. Our results emphasize that monocyte apoptosis has a potential role in tailoring the immune response in neonatal sepsis.
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Affiliation(s)
- Ch Gille
- Department of Neonatology, University Children's Hospital, 72076 Tübingen, Germany
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12
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Aslam R, Kim M, Speck E, Seetanah AC, Molinski S, Freedman J, Semple J. Platelet and red blood cell phagocytosis kinetics are differentially controlled by phosphatase activity within mononuclear cells. Transfusion 2007; 47:2161-8. [DOI: 10.1111/j.1537-2995.2007.01441.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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