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Gugjoo MB, Sakeena Q, Wani MY, Abdel-Baset Ismail A, Ahmad SM, Shah RA. Mesenchymal stem cells: A promising antimicrobial therapy in veterinary medicine. Microb Pathog 2023; 182:106234. [PMID: 37442216 DOI: 10.1016/j.micpath.2023.106234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/18/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Abstract
Growing antimicrobial resistance (AMR) is a threat to human and animal populations citing the limited available options. Alternative antimicrobial options or functional enhancement of currently available antimicrobials remains only options. One of the potential options seems stem cells especially the mesenchymal stem cells (MSCs) that show antimicrobial properties. These cells additionally have pro-healing effects that may plausibly improve healing outcomes. MSCs antimicrobial actions are mediated either through direct cell-cell contact or their secretome that enhances innate immune mediated antimicrobial activities. These cells synergistically enhance efficacy of currently available antimicrobials especially against the biofilms. Reciprocal action from antimicrobials on the MSCs functionality remains poorly understood. Currently, the main limitation with MSCs based therapy is their limited efficacy. This demands further understanding and can be enhanced through biotechnological interventions. One of the interventional options is the 'priming' to enhance MSCs resistance and specific expression potential. The available literature shows potential antimicrobial actions of MSCs both ex vivo as well as in vivo. The studies on veterinary species are very promising although limited by number and extensiveness in details for their utility as standard therapeutic agents. The current review aims to discuss the role of animals in AMR and the potential antimicrobial actions of MSCs in veterinary medicine. The review also discusses the limitations in their utilization as standard therapeutics.
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Affiliation(s)
| | - Qumaila Sakeena
- Division of Veterinary Surgery & Radiology, FVSc & AH, Shuhama, J&K, 190006, India
| | - Mohd Yaqoob Wani
- Directorate of Extension Education, SKUAST-K, Shalimar, J&K, 190025, India
| | - Ahmed Abdel-Baset Ismail
- Department of Surgery, Anaesthesiology and Radiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia, 44511, Egypt
| | - Syed Mudasir Ahmad
- Division of Animal Biotechnology, FVSc & AH, Shuhama, J&K, 190006, India
| | - Riaz Ahmad Shah
- Division of Animal Biotechnology, FVSc & AH, Shuhama, J&K, 190006, India
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Gimeno-Molina B, Muller I, Kropf P, Sykes L. The Role of Neutrophils in Pregnancy, Term and Preterm Labour. Life (Basel) 2022; 12:life12101512. [PMID: 36294949 PMCID: PMC9605051 DOI: 10.3390/life12101512] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/20/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
Neutrophils are surveillance cells, and the first to react and migrate to sites of inflammation and infection following a chemotactic gradient. Neutrophils play a key role in both sterile inflammation and infection, performing a wide variety of effector functions such as degranulation, phagocytosis, ROS production and release of neutrophil extracellular traps (NETs). Healthy term labour requires a sterile pro-inflammatory process, whereas one of the most common causes of spontaneous preterm birth is microbial driven. Peripheral neutrophilia has long been described during pregnancy, and evidence exists demonstrating neutrophils infiltrating the cervix, uterus and foetal membranes during both term and preterm deliveries. Their presence supports a role in tissue remodelling via their effector functions. In this review, we describe the effector functions of neutrophils. We summarise the evidence to support their role in healthy pregnancy and labour and describe their potential contribution to microbial driven preterm birth.
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Affiliation(s)
- Belen Gimeno-Molina
- Imperial College Parturition Research Group, Department of Metabolism, Digestion and Reproduction, Imperial College London, London W12 0HS, UK
- March of Dimes European Prematurity Research Centre, Imperial College London, London W12 0HS, UK
| | - Ingrid Muller
- Department of Infectious Diseases, Imperial College London, London W2 1NY, UK
| | - Pascale Kropf
- March of Dimes European Prematurity Research Centre, Imperial College London, London W12 0HS, UK
- Department of Infectious Diseases, Imperial College London, London W2 1NY, UK
| | - Lynne Sykes
- Imperial College Parturition Research Group, Department of Metabolism, Digestion and Reproduction, Imperial College London, London W12 0HS, UK
- March of Dimes European Prematurity Research Centre, Imperial College London, London W12 0HS, UK
- The Parasol Foundation Centre for Women’s Health and Cancer Research, St. Mary’s Hospital, Imperial College Healthcare NHS Trust, London W2 1NY, UK
- Correspondence:
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Cavalli S, Lonati PA, Gerosa M, Caporali R, Cimaz R, Chighizola CB. Beyond Systemic Lupus Erythematosus and Anti-Phospholipid Syndrome: The Relevance of Complement From Pathogenesis to Pregnancy Outcome in Other Systemic Rheumatologic Diseases. Front Pharmacol 2022; 13:841785. [PMID: 35242041 PMCID: PMC8886148 DOI: 10.3389/fphar.2022.841785] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/27/2022] [Indexed: 12/17/2022] Open
Abstract
Evidence about the relevance of the complement system, a highly conserved constituent of the innate immunity response that orchestrates the elimination of pathogens and the inflammatory processes, has been recently accumulated in many different rheumatologic conditions. In rheumatoid arthritis, complement, mainly the classical pathway, contributes to tissue damage especially in seropositive subjects, with complement activation occurring in the joint. Data about complement pathways in psoriatic arthritis are dated and poorly consistent; among patients with Sjögren syndrome, hypocomplementemia exerts a prognostic role, identifying patients at risk of extra-glandular manifestations. Hints about complement involvement in systemic sclerosis have been recently raised, following the evidence of complement deposition in affected skin and in renal samples from patients with scleroderma renal crisis. In vasculitides, complement plays a dual role: on one hand, stimulation of neutrophils with anti-neutrophil cytoplasmic antibodies (ANCA) results in the activation of the alternative pathway, on the other, C5a induces translocation of ANCA antigens, favouring the detrimental role of antibodies. Complement deposition in the kidneys identifies patients with more aggressive renal disease; patients with active disease display low serum levels of C3 and C4. Even though in dermatomyositis sC5b-9 deposits are invariably present in affected muscles, data on C3 and C4 fluctuation during disease course are scarce. C3 and C1q serum levels have been explored as potential markers of disease activity in Takayasu arteritis, whereas data in Behçet disease are limited to in vitro observations. Pregnancies in women with rheumatologic conditions are still burdened by a higher rate of pregnancy complications, thus the early identification of women at risk would be invaluable. A fine-tuning of complement activation is required from a physiological progression of pregnancy, from pre-implantation stages, through placentation to labour. Complement deregulation has been implicated in several pregnancy complications, such as recurrent abortion, eclampsia and premature birth; low complement levels have been shown to reliably identify women at risk of complications. Given its physiologic role in orchestrating pregnancy progression and its involvement as pathogenic effector in several rheumatologic conditions, complement system is an attractive candidate biomarker to stratify the obstetric risk among women with rheumatologic conditions.
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Affiliation(s)
- Silvia Cavalli
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Italy.,Clinical Rheumatology Unit, ASST G. Pini & CTO, Milan, Italy
| | - Paola Adele Lonati
- Experimental Laboratory of Immunorheumatological Researches, IRCCS Istituto Auxologico Italiano, Cusano Milanino, Italy
| | - Maria Gerosa
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Italy.,Clinical Rheumatology Unit, ASST G. Pini & CTO, Milan, Italy
| | - Roberto Caporali
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Italy.,Clinical Rheumatology Unit, ASST G. Pini & CTO, Milan, Italy
| | - Rolando Cimaz
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Italy.,Pediatric Rheumatology Unit, ASST G. Pini & CTO, Milan, Italy
| | - Cecilia Beatrice Chighizola
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Italy.,Pediatric Rheumatology Unit, ASST G. Pini & CTO, Milan, Italy
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Russell KA, Garbin LC, Wong JM, Koch TG. Mesenchymal Stromal Cells as Potential Antimicrobial for Veterinary Use-A Comprehensive Review. Front Microbiol 2020; 11:606404. [PMID: 33335522 PMCID: PMC7736177 DOI: 10.3389/fmicb.2020.606404] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/10/2020] [Indexed: 12/13/2022] Open
Abstract
The emergence of “superbugs” resistant to antimicrobial medications threatens populations both veterinary and human. The current crisis has come about from the widespread use of the limited number of antimicrobials available in the treatment of livestock, companion animal, and human patients. A different approach must be sought to find alternatives to or enhancements of present conventional antimicrobials. Mesenchymal stromal cells (MSC) have antimicrobial properties that may help solve this problem. In the first part of the review, we explore the various mechanisms at work across species that help explain how MSCs influence microbial survival. We then discuss the findings of recent equine, canine, and bovine studies examining MSC antimicrobial properties in which MSCs are found to have significant effects on a variety of bacterial species either alone or in combination with antibiotics. Finally, information on the influence that various antimicrobials may have on MSC function is reviewed. MSCs exert their effect directly through the secretion of various bioactive factors or indirectly through the recruitment and activation of host immune cells. MSCs may soon become a valuable tool for veterinarians treating antimicrobial resistant infections. However, a great deal of work remains for the development of optimal MSC production conditions and testing for efficacy on different indications and species.
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Affiliation(s)
- Keith A Russell
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Livia C Garbin
- Clinical Veterinary Sciences Department, School of Veterinary Medicine, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, West Indies
| | - Jonathan M Wong
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Thomas G Koch
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Chighizola CB, Lonati PA, Trespidi L, Meroni PL, Tedesco F. The Complement System in the Pathophysiology of Pregnancy and in Systemic Autoimmune Rheumatic Diseases During Pregnancy. Front Immunol 2020; 11:2084. [PMID: 32973817 PMCID: PMC7481445 DOI: 10.3389/fimmu.2020.02084] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/30/2020] [Indexed: 12/16/2022] Open
Abstract
The complement system plays a double role in pregnancy exerting both protective and damaging effects at placental level. Complement activation at fetal-maternal interface participates in protection against infectious agents and helps remove apoptotic and necrotic cells. Locally synthesized C1q contributes to the physiologic vascular remodeling of spiral arteries characterized by loss of smooth muscle cells and transformation into large dilated vessels. Complement activation triggered by the inflammatory process induced by embryo implantation can damage trophoblast and other decidual cells that may lead to pregnancy complications if the cells are not protected by the complement regulators CD55, CD46, and CD59 expressed on cell surface. However, uncontrolled complement activation induces placental alterations resulting in adverse pregnancy outcomes. This may occur in pathological conditions characterized by placental localization of complement fixing antibodies directed against beta2-glycoprotein 1, as in patients with anti-phospholipid syndrome, or circulating immune complexes deposited in placenta, as in patients with systemic lupus erythematosus. In other diseases, such as preeclampsia, the mechanism of complement activation responsible for complement deposits in placenta is unclear. Conflicting results have been reported on the relevance of complement assays as diagnostic and prognostic tools to assess complement involvement in pregnant patients with these disorders.
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Affiliation(s)
- Cecilia Beatrice Chighizola
- Experimental Laboratory of Immunological and Rheumatologic Researches, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Paola Adele Lonati
- Experimental Laboratory of Immunological and Rheumatologic Researches, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Laura Trespidi
- Department of Obstetrics and Gynaecology, Fondazione Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Pier Luigi Meroni
- Experimental Laboratory of Immunological and Rheumatologic Researches, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Francesco Tedesco
- Experimental Laboratory of Immunological and Rheumatologic Researches, Istituto Auxologico Italiano, IRCCS, Milan, Italy
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Galindo-Sevilla N, Reyes-Arroyo F, Mancilla-Ramírez J. The role of complement in preterm birth and prematurity. J Perinat Med 2019; 47:793-803. [PMID: 31494635 DOI: 10.1515/jpm-2019-0175] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/14/2019] [Indexed: 12/17/2022]
Abstract
Complications of preterm birth (PTB) are the global leading cause of death in children younger than 5 years of age. Almost 15 million children are born prematurely in the world each year. Increasing evidence suggests that labor and delivery have many hallmarks of an inflammatory reaction, where complement activation has an active participation. As one of the most important components of inflammation, the role of complement during labor and PTB is becoming an attractive research target. The complement components C1q and C5b-9 are deposited on fetal membranes and release inflammatory mediators that contribute to uterine contractions, cervical ripening, cell chemotaxis, metalloproteinases production, membrane awaking and rupture, and it participates as a co-adjuvant in the onset and progress of labor. This article reviews a basic description of the complement system, its role in preterm birth and current concepts regarding its contribution in novel therapy strategies and new biomarkers.
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Affiliation(s)
- Norma Galindo-Sevilla
- Departamento de Infectología e Inmunología, Instituto Nacional de Perinatología, Secretaría de Salud, Mexico City 11000, Mexico
| | - Frida Reyes-Arroyo
- Departamento de Infectología e Inmunología, Instituto Nacional de Perinatología, Secretaría de Salud, Mexico City 11000, Mexico
- Servicio Social en Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Javier Mancilla-Ramírez
- Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico
- Hospital de la Mujer, Secretaría de Salud, Salvador Díaz Mirón esq, Plan de San Luis S/N, Casco de Santo Tomás, Miguel Hidalgo, Mexico City 11340, Mexico
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The role of innate immunity in spontaneous preterm labor: A systematic review. J Reprod Immunol 2019; 136:102616. [PMID: 31581042 DOI: 10.1016/j.jri.2019.102616] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 03/24/2019] [Accepted: 09/20/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND Immunoinflammatory response by innate immunity components is a field with increasing interest in understanding the mechanisms behind preterm labor (PTL). OBJECTIVES Systematic review of the role of innate immunity in spontaneous PTL. STUDY DESIGN PubMed, Scopus, ClinicalTrials.gov and Web of Science were searched using pregnancy AND innate OR toll-like OR natural-killer OR dendritic AND delivery OR premature OR rupture of membranes. MAIN OUTCOME MEASURES All article titles and abstracts were evaluated by two individuals, based in strict predefined inclusion criteria. For relevant studies, title, abstract, and full text were assessed to identify PTL and innate immunity studies, excluding multiple pregnancies, cervical insufficiency and indicated PTL. RESULTS From 894 articles evaluated, 101 full texts articles were assessed independently. For this systematic review 44 studies were finally included. Toll-like receptors 2 and 4 mediated immune dysfunction and inflammation can result in PTL. Moreover, PTL is linked to high levels of CD14+ monocytes; neutrophils seem important in inflammation-associated PTL and in pathological preterm premature rupture of membranes. Besides, decidual natural-killer cells and premature activation of dendritic cells may also participate in the etiology of PTL. Finally, dysregulation of maternal complement might increase the risk of PTL, characterized by high levels of innate lymphoid cells 2 and 3. CONCLUSIONS Further research is warranted to ascertain the precise role of innate immunity in PTL. Nonetheless, our results indicate that Toll-like receptors, monocytes, natural-killer cells, dendritic cells and complement have significant roles in PTL.
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Tang M, Zhang K, Li Y, He QH, Li GQ, Zheng QY, Zhang KQ. Mesenchymal stem cells alleviate acute kidney injury by down-regulating C5a/C5aR pathway activation. Int Urol Nephrol 2018; 50:1545-1553. [PMID: 29594894 DOI: 10.1007/s11255-018-1844-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 03/12/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND Acute kidney injury (AKI) leads to serious renal damage, and early inhibition of inflammation is necessary for its treatment. C5a/C5aR signaling activation promotes inflammatory response in tissue injury. Anti-inflammatory activity of mesenchymal stem cells (MSCs) makes it possible to alleviate AKI by controlling the C5a/C5aR signaling activation. METHODS Ischemia reperfusion (I/R)-induced AKI models in wild-type and C5aR KO mice were used. In addition, human bone marrow MSCs (hBM-MSCs) or C5aR antagonist were injected in this model. All animals were killed at 72 h after reperfusion. In vitro, the LPS-activated macrophage line RAW264.7 cells were co-cultured with or without hBM-MSCs in the presence of recombinant C5a or not for indicated time points. After that, C5aR expression, the inflammatory factor production, and NF-κB translocation in RAW264.7 cells were measured. RESULTS hBM-MSC treatment and C5a/C5aR signaling blockade or C5aR-deficiency exhibited similar attenuated effects on I/R-induced AKI, macrophages infiltration, and the pro-inflammatory cytokines TNF-α and IL-1β expression in renal tissues in mice. Moreover, hBM-MSC administration led to a significant reduction in C5a levels in serum and C5aR expression in the kidney tissues in mice after I/R. In vitro, upon co-culture with hBM-MSCs, both C5aR expression and the secretion of pro-inflammatory factors TNF-α, IL-6, and nitric oxide in LPS-activated macrophages were markedly reduced. Accordingly, recombinant complement C5a accelerated LPS-induced NF-κB translocation and pro-inflammatory factors expression in macrophages, but the addition of hBM-MSCs reversed these C5a-induced effects. CONCLUSIONS The present study indicates that hBM-MSCs alleviate AKI via suppressing C5a/C5aR-NF-κB pathway activation.
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Affiliation(s)
- Ming Tang
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Kun Zhang
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - You Li
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Qian-Hui He
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Gui-Qing Li
- Department of Immunology, Third Military Medical University, Chongqing, 400038, China
| | - Quan-You Zheng
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Ke-Qin Zhang
- Department of Nephrology, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China.
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Zeybek B, Costantine M, Kilic GS, Borahay MA. Therapeutic Roles of Statins in Gynecology and Obstetrics: The Current Evidence. Reprod Sci 2018; 25:802-817. [PMID: 29320955 DOI: 10.1177/1933719117750751] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Statins are a class of drugs, which act by inhibiting the rate-limiting enzyme of cholesterol biosynthesis (3-hydroxy-3-methyl-glutaryl-CoA reductase). The inhibition of mevalonate synthesis leads to subsequent inhibition of downstream products of this pathway, which explains the pleiotropic effects of these agents in addition to their well-known lipid-lowering effects. Accumulating evidence suggests that statins might be beneficial in various obstetric and gynecologic conditions. METHODS Literature searches were performed in PubMed and EMBASE for articles with content related to statins in obstetrics and gynecology. The findings are hereby reviewed and discussed. RESULTS Inhibition of mevalonate pathway leads to subsequent inhibition of downstream products such as geranyl pyrophosphate, farnesyl pyrophosphate, and geranylgeranyl pyrophosphate. These products are required for proper intracellular localization of several proteins, which play important roles in signaling pathways by regulating membrane trafficking, motility, proliferation, differentiation, and cytoskeletal organization. The pleiotropic effects of statins can be summarized in 4 categories: antiproliferative, anti-invasive, anti-inflammatory, and antiangiogenic. The growing body of evidence is promising for these agents to be beneficial in endometriosis, polycystic ovary syndrome, adhesion prevention, ovarian cancer, preeclampsia, and antiphospholipid syndrome. Although in vivo studies showed varying degrees of benefit on fibroids and preterm birth, appropriately designed clinical trials are needed to make definitive conclusions. CONCLUSION Statins might play a role in the treatment of endometriosis, polycystic ovary syndrome, adhesion prevention, ovarian cancer, preeclampsia, and antiphospholipid syndrome.
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Affiliation(s)
- Burak Zeybek
- 1 Department of Obstetrics & Gynecology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Maged Costantine
- 1 Department of Obstetrics & Gynecology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Gokhan S Kilic
- 1 Department of Obstetrics & Gynecology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Mostafa A Borahay
- 2 Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Yamanegi K, Yamada N, Nakasho K, Nishiura H. Erythroblast differentiation at spleen in Q137E mutant ribosomal protein S19 gene knock-in C57BL/6J mice. Immunobiology 2017; 223:118-124. [PMID: 29017823 DOI: 10.1016/j.imbio.2017.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/01/2017] [Accepted: 10/03/2017] [Indexed: 01/27/2023]
Abstract
We recently found that erythroblast-like cells derived from human leukaemia K562 cells express C5a receptor (C5aR) and produce its antagonistic and agonistic ligand ribosomal protein S19 (RP S19) polymer, which is cross-linked between K122 and Q137 by tissue transglutaminases. RP S19 polymer binds to the reciprocal C5aRs on erythroblast-like cells and macrophage-like cells derived from human monocytic THP-1 cells and promotes differentiation into reticulocyte-like cells through enucleation in vitro. To examine the roles of RP S19 polymer in mouse erythropoiesis, we prepared Q137E mutant RP S19 gene knock-in C57BL/6J mice. In contrast to wild-type mice, erythroblast numbers at the preliminary stage (CD71high/TER119low) in spleen based on transferrin receptor (CD71) and glycophorin A (TER119) values and erythrocyte numbers in orbital artery bloods were not largely changed in knock-in mice. Conversely, erythroblast numbers at the early stage (CD71high/TER119high) were significantly decreased in spleen by knock-in mice. The reduction of early erythroblast numbers in spleen was enhanced by the phenylhydrazine-induced pernicious anemia model knock-in mice and was rescued by a functional analogue of RP S19 dimer S-tagged C5a/RP S19. These data indicated that RP S19 polymer plays the roles in the early erythroblast differentiation of C57BL/6J mouse spleen.
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Affiliation(s)
- Koji Yamanegi
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Naoko Yamada
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Keiji Nakasho
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Hiroshi Nishiura
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
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Guerra AD, Rose WE, Hematti P, Kao WJ. Minocycline modulates NFκB phosphorylation and enhances antimicrobial activity against Staphylococcus aureus in mesenchymal stromal/stem cells. Stem Cell Res Ther 2017; 8:171. [PMID: 28732530 PMCID: PMC5521110 DOI: 10.1186/s13287-017-0623-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/05/2017] [Accepted: 06/28/2017] [Indexed: 02/06/2023] Open
Abstract
Background Mesenchymal stromal/stem cells (MSCs) have demonstrated pro-healing properties due to their anti-inflammatory, angiogenic, and even antibacterial properties. We have shown previously that minocycline enhances the wound healing phenotype of MSCs, and MSCs encapsulated in poly(ethylene glycol) and gelatin-based hydrogels with minocycline have antibacterial properties against Staphylococcus aureus (SA). Here, we investigated the signaling pathway that minocycline modulates in MSCs which results in their enhanced wound healing phenotype and determined whether preconditioning MSCs with minocycline has an effect on antimicrobial activity. We further investigated the in-vivo antimicrobial efficacy of MSC and antibiotic-loaded hydrogels in inoculated full-thickness cutaneous wounds. Methods Modulation of cell signaling pathways in MSCs with minocycline was analyzed via western blot, immunofluorescence, and ELISA. Antimicrobial efficacy of MSCs pretreated with minocycline was determined by direct and transwell coculture with SA. MSC viability after SA coculture was determined via a LIVE/DEAD® stain. Internalization of SA by MSCs pretreated with minocycline was determined via confocal imaging. All protein and cytokine analysis was done via ELISA. The in-vivo antimicrobial efficacy of MSC and antibiotic-loaded hydrogels was determined in Sprague–Dawley rats inoculated with SA. Two-way ANOVA for multiple comparisons was used with Bonferroni test assessment and an unpaired two-tailed Student’s t test was used to determine p values for all assays with multiple or two conditions, respectively. Results Minocycline leads to the phosphorylation of transcriptional nuclear factor-κB (NFκB), but not c-Jun NH2-terminal kinase (JNK) or mitogen-activated protein kinase (ERK). Inhibition of NFκB activation prevented the minocycline-induced increase in VEGF secretion. Preconditioning of MSCs with minocycline led to a reduced production of the antimicrobial peptide LL-37, but enhanced antimicrobial activity against SA via an increased production of IL-6 and SA internalization. MSC and antibiotic-loaded hydrogels reduced SA bioburden in inoculated wounds over 3 days and accelerated reepithelialization. Conclusions Minocycline modulates the NFκB pathway in MSCs that leads to an enhanced production of IL-6 and internalization of SA. This mechanism may have contributed to the in-vivo antibacterial efficacy of MSC and antibiotic-loaded hydrogels. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0623-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alberto Daniel Guerra
- School of Pharmacy, Division of Pharmaceutical Sciences, Pharmacy Practice Division, University of Wisconsin-Madison, 777 Highland Avenue, 7123 Rennebohm Hall, Madison, WI, 53705, USA
| | - Warren E Rose
- School of Pharmacy, Division of Pharmaceutical Sciences, Pharmacy Practice Division, University of Wisconsin-Madison, 777 Highland Avenue, 7123 Rennebohm Hall, Madison, WI, 53705, USA
| | - Peiman Hematti
- School of Medicine and Public Health, Department of Medicine, Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, 1685 Highland Avenue, Madison, WI, 53705, USA
| | - W John Kao
- School of Pharmacy, Division of Pharmaceutical Sciences, Pharmacy Practice Division, University of Wisconsin-Madison, 777 Highland Avenue, 7123 Rennebohm Hall, Madison, WI, 53705, USA. .,College of Engineering, Department of Biomedical Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI, 53706, USA. .,School of Medicine and Public Health, Department of Surgery, University of Wisconsin-Madison, 1685 Highland Avenue, Madison, WI, 53705, USA. .,Present Address: 10/F Knowles Building, Pokfulam, Hong Kong.
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Stålhammar ME, Sindelar R, Douhan Håkansson L. Neutrophil Receptor Response to Bacterial N-formyl Peptides is Similar in Term Newborn Infants and Adults in Contrast to IL-8. Scand J Immunol 2017; 84:332-337. [PMID: 27606963 DOI: 10.1111/sji.12477] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 09/03/2016] [Indexed: 11/26/2022]
Abstract
We have previously observed that neutrophils from neonates exhibit different migratory responses to intermediate and end-target chemoattractants compared to adults. The aim of this study was to investigate the effect of the chemoattractants IL-8 (intermediate) and formyl-methionyl-leucyl-phenylalanine (fMLP; end-target) on cell surface receptor expression involved in adhesion, migration and granule release of neutrophils from term newborn infants and adults. Heparinized cord blood from 16 healthy term newborn infants delivered by caesarean section and peripheral blood from 17 healthy adults were incubated with 1 μm IL-8 or 0.1 μm fMLP, previously defined as optimal inducers of neutrophil migration. The leukocytes were labelled with antibodies to cell surface receptors (CD11b, CD15S, CD18, CD35, CD44, CD64, CD65, CD88, CD162, CD181 and CD182). Receptor expression was quantified by flow cytometry analysis. Upregulation of CD11b and downregulation of CD88 and CD182 after stimulation with IL-8 were more pronounced in adults than in neonates (P < 0.05, P < 0.05 and P ≤ 0.001, respectively), whereas fMLP induced changes in receptor expression that were of the same magnitude in neutrophils from neonates as from adults. We observed similar expression of receptors that mediate adhesion, migration, granule activation and phagocytosis induced by fMLP in neutrophils from neonates and adults. In contrast, differences between neonates and adults, induced by IL-8, suggest that the neutrophil response to intermediate chemoattractants might lead to a compromised infectious response in newborn infants.
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Affiliation(s)
- M E Stålhammar
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - R Sindelar
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
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Esen F, Orhun G, Ozcan PE, Senturk E, Kucukerden M, Giris M, Akcan U, Yilmaz CU, Orhan N, Arican N, Kaya M, Gazioglu SB, Tuzun E. Neuroprotective effects of intravenous immunoglobulin are mediated through inhibition of complement activation and apoptosis in a rat model of sepsis. Intensive Care Med Exp 2017; 5:1. [PMID: 28058672 PMCID: PMC5215999 DOI: 10.1186/s40635-016-0114-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 12/08/2016] [Indexed: 12/25/2022] Open
Abstract
Background Intravenous (IV) immunoglobulin (Ig) treatment is known to alleviate behavioral deficits and increase survival in the experimentally induced model of sepsis. To delineate the mechanisms by which IVIg treatment prevents neuronal dysfunction, an array of immunological and apoptosis markers was investigated. Methods Sepsis was induced by cecal ligation perforation (CLP) in rats. The animals were divided into five groups: sham, control, CLP + saline, CLP + immunoglobulin G (IgG) (250 mg/kg, iv), and CLP + immunoglobulins enriched with immunoglobulin M (IgGAM) (250 mg/kg, iv). Blood and brain samples were taken in two sets of experiments to see the early (24 h) and late (10 days) effects of treatment. Total complement activity, complement 3 (C3), and soluble complement C5b-9 levels were measured in the sera of rats using ELISA-based methods. Cerebral complement, complement receptor, NF-κB, Bax, and Bcl-2 expressions were analyzed by western blot and/or RT-PCR methods. Immune cell infiltration and gliosis were examined by immunohistochemistry using CD3, CD4, CD8, CD11b, CD19, and glial fibrillary acidic protein antibodies. Apoptotic neuronal death was investigated by TUNEL staining. Results IVIgG and IgGAM administration significantly reduced systemic complement activity and cerebral C5a and C5a receptor expression. Likewise, both treatment methods reduced proapoptotic NF-κB and Bax expressions in the brain. IVIgG and IgGAM treatment induced considerable amelioration in glial cell proliferation and neuronal apoptosis which were increased in non-treated septic rats. Conclusions We suggest that IVIgG and IgGAM administration ameliorates neuronal dysfunction and behavioral deficits by reducing apoptotic cell death and glial cell proliferation. In both treatment methods, these beneficial effects might be mediated through reduction of anaphylatoxic C5a activity and subsequent inhibition of inflammation and apoptosis pathways. Electronic supplementary material The online version of this article (doi:10.1186/s40635-016-0114-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Figen Esen
- Department of Anesthesiology, Istanbul Faculty of Medicine, Istanbul University, Capa-Fatih, 34039, Istanbul, Turkey
| | - Gunseli Orhun
- Department of Anesthesiology, Istanbul Faculty of Medicine, Istanbul University, Capa-Fatih, 34039, Istanbul, Turkey
| | - Perihan Ergin Ozcan
- Department of Anesthesiology, Istanbul Faculty of Medicine, Istanbul University, Capa-Fatih, 34039, Istanbul, Turkey.
| | - Evren Senturk
- Department of Anesthesiology, Istanbul Faculty of Medicine, Istanbul University, Capa-Fatih, 34039, Istanbul, Turkey
| | - Melike Kucukerden
- Neuroscience, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Murat Giris
- Neuroscience, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ugur Akcan
- Neuroscience, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Canan Ugur Yilmaz
- Department of Physiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Nurcan Orhan
- Neuroscience, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Nadir Arican
- Department of Forensic Medicine, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Mehmet Kaya
- Department of Physiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Sema Bilgic Gazioglu
- Immunology, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Erdem Tuzun
- Neuroscience, Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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Al Rabea A, Nadeau-Vallée M, Hou X. Implication of the complement system, specifically the active form and the anaphylatoxins, in human parturition. J Reprod Immunol 2015; 112:81. [PMID: 26344896 DOI: 10.1016/j.jri.2015.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 08/20/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Areej Al Rabea
- McGill University, Department of Experimental Surgery, Canada
| | | | - Xin Hou
- CHU Sainte-Justine Research Center, Department of Pediatrics, Canada
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15
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Denny KJ, Coulthard LG, Mantovani S, Simmons D, Taylor SM, Woodruff TM. The Role of C5a Receptor Signaling in Endotoxin-Induced Miscarriage and Preterm Birth. Am J Reprod Immunol 2015; 74:148-55. [PMID: 25846074 DOI: 10.1111/aji.12386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 03/12/2015] [Indexed: 01/02/2023] Open
Abstract
PROBLEM Complement factor 5a (C5a), a potent pro-inflammatory mediator of the complement system, has been implicated in fetal rejection throughout gestation, from miscarriage to preterm birth. This study aimed to investigate the role of the principal C5a receptor, C5aR1 (CD88), in both miscarriage and preterm birth, in a bacterial endotoxin (lipopolysaccharide; LPS) murine model. METHOD OF STUDY Wild-type and C5ar1 knockout mice were administered LPS at 9.5 or 15.5 days post-conception to induce miscarriage or preterm birth, respectively. RESULTS C5ar1 knockout mice were protected against miscarriage in response to administration of LPS in early gestation. However, the absence of C5aR1 had no effect on the rates of preterm birth when LPS was administered in late gestation. CONCLUSION There may be a gestational window in which excessive activation of C5a can exert deleterious effects in pregnancy. Future strategies targeting the C5a-C5aR1 signaling axis should be considered to ameliorate miscarriages in patients with recurrent pregnancy loss.
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Affiliation(s)
- Kerina J Denny
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia.,School of Medicine, University of Queensland, Brisbane, Qld, Australia
| | - Liam G Coulthard
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia
| | - Susanna Mantovani
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia
| | - David Simmons
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia
| | - Stephen M Taylor
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia
| | - Trent M Woodruff
- School of Biomedical Sciences, University of Queensland, Brisbane, Qld, Australia
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16
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Benson MJ, Thomas NK, Talwar S, Hodson MP, Lynch JW, Woodruff TM, Borges K. A novel anticonvulsant mechanism via inhibition of complement receptor C5ar1 in murine epilepsy models. Neurobiol Dis 2015; 76:87-97. [PMID: 25681535 DOI: 10.1016/j.nbd.2015.02.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 01/21/2015] [Accepted: 02/04/2015] [Indexed: 12/24/2022] Open
Abstract
The role of complement system-mediated inflammation is of key interest in seizure and epilepsy pathophysiology, but its therapeutic potential has not yet been explored. We observed that the pro-inflammatory C5a receptor, C5ar1, is upregulated in two mouse models after status epilepticus; the pilocarpine model and the intrahippocampal kainate model. The C5ar1 antagonist, PMX53, was used to assess potential anticonvulsant actions of blocking this receptor pathway. PMX53 was found to be anticonvulsant in several acute models (6Hz and corneal kindling) and one chronic seizure model (intrahippocampal kainate model). The effects in the 6Hz model were not found in C5ar1-deficient mice, or with an inactive PMX53 analogue suggesting that the anticonvulsant effect of PMX53 is C5ar1-specific. In the pilocarpine model, inhibition or absence of C5ar1 during status epilepticus lessened seizure power and protected hippocampal neurons from degeneration as well as halved SE-associated mortality. C5ar1-deficiency during pilocarpine-induced status epilepticus also was accompanied by attenuation of TNFα upregulation by microglia, suggesting that C5ar1 activation results in TNFα release contributing to disease. Patch clamp studies showed that C5a-induced microglial K(+) outward currents were also inhibited with PMX53 providing a potential mechanism to explain acute anticonvulsant effects. In conclusion, our data indicate that C5ar1 activation plays a role in seizure initiation and severity, as well as neuronal degeneration following status epilepticus. The widespread anticonvulsant activity of PMX53 suggests that C5ar1 represents a novel target for improved anti-epileptic drug development which may be beneficial for pharmaco-resistant patients.
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Affiliation(s)
- Melissa J Benson
- Department of Pharmacology, School of Biomedical Sciences, The University of Queensland, Skerman Building, St Lucia, Queensland 4072, Australia
| | - Nicola K Thomas
- Department of Pharmacology, School of Biomedical Sciences, The University of Queensland, Skerman Building, St Lucia, Queensland 4072, Australia
| | - Sahil Talwar
- Queensland Brain Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Mark P Hodson
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Joseph W Lynch
- Queensland Brain Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Trent M Woodruff
- Department of Pharmacology, School of Biomedical Sciences, The University of Queensland, Skerman Building, St Lucia, Queensland 4072, Australia
| | - Karin Borges
- Department of Pharmacology, School of Biomedical Sciences, The University of Queensland, Skerman Building, St Lucia, Queensland 4072, Australia.
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Gonzalez JM, Pedroni SMA, Girardi G. Statins prevent cervical remodeling, myometrial contractions and preterm labor through a mechanism that involves hemoxygenase-1 and complement inhibition. Mol Hum Reprod 2014; 20:579-89. [PMID: 24623738 DOI: 10.1093/molehr/gau019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024] Open
Abstract
Preterm birth (PTB) is a major public health problem, with a global prevalence of 9.6% and over a million annual neonatal deaths. In a mouse model of preterm labor (PTL) induced by intravaginal administration of a subclinical dose of lipopolysaccharide (LPS), we previously demonstrated that LPS ascends to the cervix, inducing complement activation, cervical remodeling and PTL. Here we show that complement activation also plays a role in myometrial contractions during PTL in this model. Increased levels of C5a were detected in the myometrium of LPS-treated mice but not in age-matched control or term myometrium. Human and mouse myometrium incubated with C5a showed increased frequency of contractions and expression of connexin 43, suggesting that C5a is an uterotonic molecule. Statins, which showed beneficial effects in preventing complement-mediated pregnancy complications, prevented cervical remodeling, myometrial contractions and PTL in the LPS model. The protective effects of statins in PTL were associated with increased synthesis, expression and activity of heme oxygenase (HO-1) in myometrium and cervix. Coadministration of HO-1 inhibitor tin-protoporphyrin-IX with pravastatin abrogated the protective effects of pravastatin on cervical remodeling and myometrial contractions leading to PTB. In addition, pravastatin inhibited complement activation in the cervix by increasing the synthesis and expression of complement inhibitor decay-accelerating factor. This study in mice suggests that statins might be useful to prevent PTL in humans. Clinical trials in humans are needed and if these results are confirmed, they may form the basis for a new clinical approach to prevent PTB.
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Affiliation(s)
- Juan M Gonzalez
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA 94117, USA
| | - Silvia M A Pedroni
- MRC Centre for Reproductive Health, University of Edinburgh, Queen's Medical Research Institute, Edinburgh EH16 4TJ, UK Clinical Sciences, Imperial College London, London W12 0NN, UK
| | - Guillermina Girardi
- MRC Centre for Reproductive Health, University of Edinburgh, Queen's Medical Research Institute, Edinburgh EH16 4TJ, UK MRC Centre for Inflammation Research, University of Edinburgh, Queen's Medical Research Institute, Edinburgh EH16 4TJ, UK King's College London, St Thomas' Hospital, London SE1 7EH, UK
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Ricklin D, Lambris JD. Complement in immune and inflammatory disorders: pathophysiological mechanisms. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2013; 190:3831-8. [PMID: 23564577 PMCID: PMC3623009 DOI: 10.4049/jimmunol.1203487] [Citation(s) in RCA: 344] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Although acute or chronic inflammation is a common component of many clinical disorders, the underlying processes can be highly distinct. In recent years, the complement system has been associated with a growing number of immunological and inflammatory conditions that include degenerative diseases, cancer, and transplant rejection. It becomes evident that excessive activation or insufficient control of complement activation on host cells can cause an immune imbalance that may fuel a vicious cycle between complement, inflammatory cells, and tissue damage that exacerbates clinical complications. Although the exact involvement of complement needs to be carefully investigated for each disease, therapeutic modulation of complement activity emerges as an attractive target for upstream inhibition of inflammatory processes. This review provides an update about the functional and collaborative capabilities of complement, highlights major disease areas with known complement contribution, and indicates the potential for complement as a focal point in immunomodulatory strategies for treating inflammatory diseases.
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Affiliation(s)
- Daniel Ricklin
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, USA
| | - John D. Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, USA
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19
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Denny KJ, Coulthard LG, Finnell RH, Callaway LK, Taylor SM, Woodruff TM. Elevated complement factor C5a in maternal and umbilical cord plasma in preeclampsia. J Reprod Immunol 2013; 97:211-6. [DOI: 10.1016/j.jri.2012.11.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 11/15/2012] [Accepted: 11/27/2012] [Indexed: 12/17/2022]
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Kobayashi H. The entry of fetal and amniotic fluid components into the uterine vessel circulation leads to sterile inflammatory processes during parturition. Front Immunol 2012; 3:321. [PMID: 23109934 PMCID: PMC3478564 DOI: 10.3389/fimmu.2012.00321] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 10/03/2012] [Indexed: 01/12/2023] Open
Abstract
Pro-inflammatory cytokines play an important role during the process of human parturition. The focus of this review was to explore the contribution of biological, biochemical, and genetic changes in the onset of term labor. This article reviews the English-language literature on inflammatory, hormonal, and immunological factors in an effort to identify the molecular basis of human parturition. The majority of the genes and proteins up-regulated in parturition at term are related to four functional categories, mechanical stretch-mediated damage-associated molecular patterns (DAMPs) activation, response to immunity, induction of inflammatory signaling, and progressive uterine myometrial contractility and resultant term birth. Mechanical stretch could promote the entry of amniotic fluid components into the uterine vessel circulation that is the common physiologic mechanism at term prior to labor. The fetal or amniotic fluid-derived DAMPs could activate the immune system. The inflammatory mediators are produced by infiltrating activated leukocytes and by the reproductive tissues themselves such as myometrium, and subsequently lead to uterine contractions. This review supports the sterile inflammation hypothesis that there are at least two phases of human parturition: the initial wave of the entry of amniotic fluid components into uterine vasculatures would be followed by the second big wave of subsequent myometrial contraction.
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Affiliation(s)
- Hiroshi Kobayashi
- Department of Obstetrics and Gynecology, Nara Medical University Kashihara, Nara, Japan
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Denny KJ, Woodruff TM, Taylor SM, Callaway LK. Complement in pregnancy: a delicate balance. Am J Reprod Immunol 2012; 69:3-11. [PMID: 22925193 DOI: 10.1111/aji.12000] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 07/09/2012] [Indexed: 02/06/2023] Open
Abstract
The complement system is a key component of innate host defence that, under normal conditions, is responsible for the opsonization and destruction of potential pathogens. However, inappropriate or excessive activation of complement can have a detrimental effect on the host and has been implicated in the pathophysiology of numerous disease states. Recently, there has been increasing evidence for a role of the complement system and, in particular, the potent pro-inflammatory anaphylatoxin complement component 5a (C5a) in both normal and complicated pregnancy. The following review describes the results of in vitro, animal, and human clinical studies investigating the role of the complement system in healthy pregnancy, recurrent miscarriage, preterm birth, and preeclampsia.
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Affiliation(s)
- Kerina J Denny
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia.
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