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Farzam-Kia N, Moratalla AC, Lemaître F, Levert A, Da Cal S, Margarido C, Carpentier Solorio Y, Arbour N. GM-CSF distinctly impacts human monocytes and macrophages via ERK1/2-dependent pathways. Immunol Lett 2023; 261:47-55. [PMID: 37516253 DOI: 10.1016/j.imlet.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 07/31/2023]
Abstract
Human monocytes and macrophages are two major myeloid cell subsets with similar and distinct functions in tissue homeostasis and immune responses. GM-CSF plays a fundamental role in myeloid cell differentiation and activation. Hence, we compared the effects of GM-CSF on the expression of several immune mediators by human monocytes and monocyte-derived macrophages obtained from healthy donors. We report that GM-CSF similarly elevated the expression of CD80 and ICAM-1 and reduced HLA-DR levels on both myeloid cell subsets. However, GM-CSF increased the percentage of macrophages expressing surface IL-15 but reduced the proportion of monocytes carrying surface IL-15. Moreover, GM-CSF significantly increased the secretion of IL-4, IL-6, TNF, CXCL10, and IL-27 by macrophages while reducing the secretion of IL-4 and CXCL10 by monocytes. We show that GM-CSF triggered ERK1/2, STAT3, STAT5, and SAPK/JNK pathways in both myeloid subsets. Using a pharmacological inhibitor (U0126) preventing ERK phosphorylation, we demonstrated that this pathway was involved in both the GM-CSF-induced increase and decrease of the percentage of IL-15+ macrophages and monocytes, respectively. Moreover, ERK1/2 contributed to GM-CSF-triggered secretion of IL-4, IL-6, TNF, IL-27 and CXCL10 by macrophages. However, the ERK1/2 pathway exhibited different roles in monocytes and macrophages for the GM-CSF-mediated impact on surface makers (CD80, HLA-DR, and ICAM-1). Our data demonstrate that GM-CSF stimulation induces differential responses by human monocytes and monocyte-derived macrophages and that some but not all of these effects are ERK-dependent.
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Affiliation(s)
- Negar Farzam-Kia
- Department of Neurosciences, Faculty of Medicine, Université de Montréal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Ana Carmena Moratalla
- Department of Neurosciences, Faculty of Medicine, Université de Montréal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Florent Lemaître
- Department of Neurosciences, Faculty of Medicine, Université de Montréal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Annie Levert
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Sandra Da Cal
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Clara Margarido
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Yves Carpentier Solorio
- Department of Neurosciences, Faculty of Medicine, Université de Montréal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Nathalie Arbour
- Department of Neurosciences, Faculty of Medicine, Université de Montréal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada.
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Dupuy V, Prieur M, Pizzoccaro A, Margarido C, Valjent E, Bockaert J, Bouschet T, Marin P, Chaumont-Dubel S. Spatiotemporal dynamics of 5-HT 6 receptor ciliary localization during mouse brain development. Neurobiol Dis 2023; 176:105949. [PMID: 36496200 DOI: 10.1016/j.nbd.2022.105949] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/25/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
The serotonin 5-HT6 receptor (5-HT6R) is a promising target to improve cognitive symptoms of psychiatric diseases of neurodevelopmental origin, such as autism spectrum disorders and schizophrenia. However, its expression and localization at different stages of brain development remain largely unknown, due to the lack of specific antibodies to detect endogenous 5-HT6R. Here, we used transgenic mice expressing a GFP-tagged 5-HT6R under the control of its endogenous promoter (Knock-in) as well as embryonic stem cells expressing the GFP-tagged receptor to extensively characterize its expression at cellular and subcellular levels during development. We show that the receptor is already expressed at E13.5 in the cortex, the striatum, the ventricular zone, and to a lesser extent the subventricular zone. In adulthood, it is preferentially found in projection neurons of the hippocampus and cerebral cortex, in striatal medium-sized spiny neurons, as well as in a large proportion of astrocytes, while it is expressed in a minor population of interneurons. Whereas the receptor is almost exclusively detected in the primary cilia of neurons at embryonic and adult stages and in differentiated stem cells, it is located in the somatodendritic compartment of neurons from some brain regions at the neonatal stage and in the soma of undifferentiated stem cells. Finally, knocking-out the receptor induces a shortening of the primary cilium, suggesting that it plays a role in its function. This study provides the first global picture of 5-HT6R expression pattern in the mouse brain at different developmental stages. It reveals dynamic changes in receptor localization in neurons at the neonatal stage, which might underlie its key role in neuronal differentiation and psychiatric disorders of neurodevelopmental origin.
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Affiliation(s)
- Vincent Dupuy
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Matthieu Prieur
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Anne Pizzoccaro
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Clara Margarido
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Emmanuel Valjent
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Joël Bockaert
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Tristan Bouschet
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Philippe Marin
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Séverine Chaumont-Dubel
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France.
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Margarido C, Ferns J, Chin V, Ribeiro T, Nascimento B, Barrett J, Herer E, Halpern S, Andrews L, Ballatyne G, Chapmam M, Gomes J, Callum J. Massive hemorrhage protocol activation in obstetrics: a 5-year quality performance review. Int J Obstet Anesth 2018; 38:37-45. [PMID: 30509680 DOI: 10.1016/j.ijoa.2018.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 09/24/2018] [Accepted: 10/13/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND A structured approach to hemorrhagic emergencies in obstetrics has gained popularity with the implementation of massive hemorrhage protocols. The trauma literature suggests that routine quality reviews should be in place to improve patient outcomes. The aim of this study was to develop quality indicators and assess compliance by the clinical team. METHODS A multidisciplinary team set the institutional quality indicators for the massive hemorrhage protocol review. A retrospective review of all obstetrical massive hemorrhage protocol activation events from September 2010 to January 2015 was performed. All protocol events occurred before the creation of the quality indicators. Data were retrieved from patient records. RESULTS There were 17 (0.09%) protocol activations for 19 790 deliveries during the study period. All 17 (100%) patients received at least one unit of red blood cells. Overactivation, defined as the transfusion of <2 units of red blood cells, occurred in two cases (12%). Common causes of non-compliance were: 24% (4/17) temperature monitoring, 18% (3/17) lactate measurement, 41% (7/17) arterial blood gas sampling, and 18% (3/17) hemoglobin maintenance within the target range of 55-95 g/L. Admission to intensive care and peripartum hysterectomy occurred in 12 and 5 cases (71% and 29%), respectively. CONCLUSIONS Suboptimal compliance was found in multiple areas, which may be attributable to the low frequency of activation of our massive haemorrhage protocol in obstetrics. The quality targets identified in this report can act as a basis for other institutions developing quality indicators to evaluate performance.
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Affiliation(s)
- C Margarido
- Department of Obstetrics Anaesthesia, Division of Obstetrical Anaesthesia, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
| | - J Ferns
- Department of Obstetrics Anaesthesia, Division of Obstetrical Anaesthesia, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - V Chin
- Department of Transfusion Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - T Ribeiro
- Department of Obstetrics Anaesthesia, Division of Obstetrical Anaesthesia, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - B Nascimento
- Department of General Surgery, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - J Barrett
- Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - E Herer
- Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - S Halpern
- Department of Obstetrics Anaesthesia, Division of Obstetrical Anaesthesia, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - L Andrews
- Department of Women and Babies, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - G Ballatyne
- Department of Women and Babies, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - M Chapmam
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - J Gomes
- Department of Evaluative Clinical Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - J Callum
- Department of Transfusion Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
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