scholarly journals The role of placental immunological, pro-inflammatory, and proteolytic factors in the process of fetal membrane expulsion in mares

2021 ◽  
Vol 77 (10) ◽  
pp. 6577-2021
Author(s):  
ANNA RAPACZ-LEONARD
Keyword(s):  
Immune System ◽  
Inflammatory Response ◽  
Proteolytic Enzyme ◽  
Fetal Membrane ◽  
Fetal Membranes ◽  
Immunological Interactions ◽  
Inflammatory Processes ◽  
Prostaglandin Endoperoxide Synthase ◽  
Lower Expression

The placenta is a temporary organ necessary for prenatal life and the development of eutherian mammals. In the mare it should be expelled within 3 hours of expulsion of the fetus. A delay in its separation can have serious or fatal consequences for mares. The preparation of the mare for the expulsion of the fetal membranes most likely requires immunological interactions between placental antigen and the mare’s immune system. The latest results suggest that fetal membrane retention is related to disorders of inflammatory processes in the placenta, including a lower expression of prostaglandin endoperoxide synthase-2. These disorders in the pro-inflammatory response and disturbances in the activity of the proteolytic enzyme network may lead to adhesion between the fetal and the maternal parts of the placenta. The resulting adhesion may cause the fetal membranes to be thicker and less flexible, making them difficult to expel. Understanding the mechanism of placental retention may contribute to the development of effective methods to prevent and treat this condition.

scholarly journals Prokineticin 1 induces a pro-inflammatory response in murine fetal membranes but does not induce preterm delivery

Reproduction ◽  
2013 ◽  
Vol 146 (6) ◽  
pp. 581-591 ◽  
Author(s):  
Tamsin R M Lannagan ◽  
Martin R Wilson ◽  
Fiona Denison ◽  
Jane E Norman ◽  
Rob D Catalano ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Mrna Expression ◽  
Preterm Delivery ◽  
Inflammatory Responses ◽  
G Protein Coupled Receptors ◽  
Fetal Membrane ◽  
Fetal Membranes ◽  
Term Labour ◽  
G Protein Coupled

The mechanisms that regulate the induction of term or preterm delivery (PTD) are not fully understood. Infection is known to play a role in the induction of pro-inflammatory cascades in uteroplacental tissues associated with preterm pathological parturition. Similar but not identical cascades are evident in term labour. In the current study, we used a mouse model to evaluate the role of prokineticins in term and preterm parturition. Prokineticins are multi-functioning secreted proteins that signal through G-protein-coupled receptors to induce gene expression, including genes important in inflammatory responses. Expression of prokineticins (Prok1andProk2) was quantified in murine uteroplacental tissues by QPCR in the days preceding labour (days 16–19).Prok1mRNA expression increased significantly on D18 in fetal membranes (compared with D16) but not in uterus or placenta. Intrauterine injection of PROK1 on D17 induced fetal membrane mRNA expression of the pro-inflammatory mediatorsIl6,Il1b,Tnf,Cxcl2andCxcl5, which are not normally up-regulated until D19 of pregnancy. However, intrauterine injection of PROK1 did not result in PTD. As expected, injection of lipopolysaccharide (LPS) induced PTD, but this was not associated with changes in expression ofProk1or its receptor (Prokr1) in fetal membranes. These results suggest that althoughProk1exhibits dynamic mRNA regulation in fetal membranes preceding labour and induces a pro-inflammatory response when injected into the uterus on D17, it is insufficient to induce PTD. Additionally, prokineticin up-regulation appears not to be part of the LPS-induced inflammatory response in mouse fetal membranes.

Virome and Inflammasomes, a Finely Tuned Balance with Important Consequences for the Host Health

2019 ◽  
Vol 26 (6) ◽  
pp. 1027-1044 ◽  
Author(s):  
Giulia Freer ◽  
Fabrizio Maggi ◽  
Mauro Pistello
Keyword(s):  
Immune System ◽  
Human Beings ◽  
Review Of The Literature ◽  
Adaptive Immune ◽  
Downstream Effects ◽  
Host Health ◽  
Inflammatory Processes ◽  
Human Immune ◽  
Immune Defences

Background:The virome is a network of viruses normally inhabiting humans. It forms a conspicuous portion of the so-called microbiome, once generically referred to as resident flora. Indeed, viruses infecting humans without leading to clinical disease are increasingly recognized as part of the microbiome and have an impact on the development of our immune system. In addition, they activate inflammasomes, multiprotein complexes that assemble in cells and that are responsible for the downstream effects of sensing pathogens.Objective:This review aims at summarizing the evidence on the role of the virome in modulating inflammation and emphasizes evidence for Anelloviruses as useful molecular markers to monitor inflammatory processes and immune system competence.Method:We carried out a review of the literature published in the last 5 years and summarized older literature to take into account ground-breaking discoveries concerning inflammasome assembly and virome.Results:A massive amount of data recently emerging demonstrate that the microbiome closely reflects what we eat, and many other unexpected variables. Composition, location, and amount of the microbiome have an impact on innate and adaptive immune defences. Viruses making up the virome contribute to shaping the immune system. Anelloviruses, the best known of such viruses, are present in most human beings, persistently without causing apparent disease. Depending on their interplay with such viruses, inflammasomes instruct host defences to tolerate or forfeit a specific microorganism.Conclusion:The virome plays an important role in shaping human immune defences and contributes to inflammatory processes by quenching or increasing them.

Immunohistochemical Study of Presence of T Cells, B Cells, and Macrophages in Periradicular Lesions of Primary Teeth

2008 ◽  
Vol 32 (4) ◽  
pp. 287-293 ◽  
Author(s):  
Michele Bolan ◽  
Daniele de Almeida Lima ◽  
Cláudia Pinto Figueiredo ◽  
Gabriella Di Giunta ◽  
Maria José de Carvalho Rocha
Keyword(s):  
T Cells ◽  
Immune System ◽  
B Cells ◽  
Primary Teeth ◽  
Microscopic Analysis ◽  
Inflammatory Cells ◽  
Periapical Lesions ◽  
Inflammatory Processes ◽  
Local Inflammatory Reaction

BACKGROUND: The periapical lesion is the result of a local inflammatory reaction caused by bacteria and its products present on the root canal. The interaction between inflammatory cells and bacteria elicit both specific and non-specific immune responses. OBJETIVE: Due to the lack of studies evaluating the role of the immune system in periapical lesions of primary teeth and considering the potentially systemic effects that these infections can cause in children, especially because of the immaturity of their immune system, we sought to evaluate the presence of T cells, B cells and macrophages on periradicular lesions in primary teeth. STUDY DESIGN: 14 periradicular lesions were analyzed. The immunohistochemistry technique was performed using CD45RO, CD20, CD68 monoclonal antibodies aiming to identify T cells, B cells and macrophages, respectively. Cells were quantified by microscopic analysis of histological sections. RESULTS: Mean percentage of positive cells CD45RO was 11.76; CD20 was 5.25; CD68 was 10.92. Our results showed that T and B cells and macrophages comprise the majority of the inflammatory infiltrate. CONCLUSION: We concluded that both humoral and cell mediated immune reactions take place in periradicular lesions of primary teeth. The immune system plays an important role on the periradicular inflammatory processes in primary teeth.

scholarly journals A pronounced uterine pro-inflammatory response at parturition is an ancient feature in mammals

2017 ◽  
Vol 284 (1865) ◽  
pp. 20171694 ◽  
Author(s):  
Victoria L. Hansen ◽  
Lauren S. Faber ◽  
Ali A. Salehpoor ◽  
Robert D. Miller
Keyword(s):  
Immune System ◽  
Inflammatory Response ◽  
Inflammatory Cytokines ◽  
Immune Regulation ◽  
Monodelphis Domestica ◽  
Immune Gene ◽  
Invasive Placenta ◽  
Gene Transcripts ◽  
Pro Inflammatory Cytokines

Regulating maternal immunity is necessary for successful human pregnancy. Whether this is needed in mammals with less invasive placentation is subject to debate. Indeed, the short gestation times in marsupials have been hypothesized to be due to a lack of immune regulation during pregnancy. Alternatively, the maternal marsupial immune system may be unstimulated in the absence of a highly invasive placenta. Transcripts encoding pro-inflammatory cytokines were found to be overrepresented in the whole uterine transcriptome at terminal pregnancy in the opossum, Monodelphis domestica . To investigate this further, immune gene transcripts were quantified throughout opossum gestation. Transcripts encoding pro-inflammatory cytokines remained relatively low during pre- and peri-attachment pregnancy stages. Levels dramatically increased late in gestation, peaking within 12 h prior to parturition. These results mirror the spike of inflammation seen at eutherian parturition but not at attachment or implantation. Our results are consistent with the role of pro-inflammatory cytokines at parturition being an ancient and conserved birth mechanism in therian mammals.

scholarly journals The Multifaceted Effects of Gut Microbiota on the Immune System of the Intestinal Mucosa

Immuno ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 583-594
Author(s):  
Takehiro Hirano ◽  
Hiroshi Nakase
Keyword(s):  
Immune System ◽  
Gut Microbiota ◽  
Gut Microbiome ◽  
Mucosal Barrier ◽  
Host Immune System ◽  
Immunological Responses ◽  
Gut Homeostasis ◽  
Inflammatory Processes ◽  
And Oxidative Stress

The gut microbiota has diverse microbial components, including bacteria, viruses, and fungi. The interaction between gut microbiome components and immune responses has been studied extensively over the last decade. Several studies have reported the potential role of the gut microbiome in maintaining gut homeostasis and the development of disease. The commensal microbiome can preserve the integrity of the mucosal barrier by acting on the host immune system. Contrastingly, dysbiosis-induced inflammation can lead to the initiation and progression of several diseases through inflammatory processes and oxidative stress. In this review, we describe the multifaceted effects of the gut microbiota on several diseases from the perspective of mucosal immunological responses.

scholarly journals Pegbovigrastim Treatment around Parturition Enhances Postpartum Immune Response Gene Network Expression of whole Blood Leukocytes in Holstein and Simmental Cows

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 621 ◽  
Author(s):  
Vincenzo Lopreiato ◽  
Ernesto Palma ◽  
Andrea Minuti ◽  
Juan J. Loor ◽  
Mariangela Lopreiato ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Immune System ◽  
Inflammatory Response ◽  
Whole Blood ◽  
Fixed Effects ◽  
Immune Response Gene ◽  
Polymorphonuclear Cells ◽  
Blood Leukocytes ◽  
Inflammatory Cascade ◽  
Lower Expression

Pegbovigrastim is a commercial long-acting analog of bovine granulocyte colony-stimulating factor (rbG-CSF) that promotes the increased count and functionality of polymorphonuclear cells in dairy cows around the time of parturition. We hypothesized that pegbovigrastim administered to periparturient cows at approximately seven days before parturition and within 24 hours after calving could affect the profiles of gene networks involved in leukocyte function. Blood was collected on Day 3 after calving from treated groups (pegbovigrastim (PEG); 13 Simmental (seven multiparous and six primiparous) and 13 Holstein (seven multiparous and six primiparous) cows) that received pegbovigrastim (Imrestor; Elanco Animal Health) and controls (CTR; 13 Simmental (seven multiparous and six primiparous) and 13 Holstein (six multiparous and seven primiparous) cows) that received saline solution. Blood from all cows was sampled from the jugular vein in a PAXgene Blood RNA System tube (Preanalytix, Hombrechtikon, Switzerland) for RNA extraction. The RT-qPCR analysis was performed to investigate a panel of 34 genes of interest, representing recognition, immune mediation, migration, cell adhesion, antimicrobial strategies, inflammatory cascade, oxidative pattern, and leukotrienes in whole blood leukocytes. Normalized data were subjected to the MIXED model of SAS (ver. 9.4) with treatment, breed, parity, and their interaction as fixed effects. Compared with CTR, whole blood leukocytes of PEG cows had higher expression of genes involved in recognition and immune modulation (CD14, CD16, MYD88, TLR2, and TLR4), cell adhesion (ITGB2, ITGAL, TLN1, SELL, SELPLG, and CD44), antimicrobial activity (MMP9, LTF, and LCN2), and inflammatory cascade (CASP1, TNFRSF1A, IL1B, IL1R, IL18, IRAK1, NLRP3, and S100A8). This suggested an improvement of migration, adhesion, and antimicrobial ability and an enhanced inflammatory response, which in turn could trigger immune cell activation and enhance function. Expression of SOD2 and ALOX5 was also greater in the PEG group. In contrast, compared with CTR cows, PEG led to lower expression of RPL13A, ALOX15, IL8, and TNF. Overall, leukocytes from Simmental compared with Holstein cows had greater expression of IDO1, RPL13A, ALOX5, CD44, CX3CR1, ITGB2, and TNFA, whereas expression of CD16 and TLR2 was lower. Overall, compared with multiparous cows, primiparous cows had higher expression of IL1B, IL18, MYD88, SELL, and TLR2 and lower expression of MMP9. Simmental cows seemed more sensitive to induction of the immune system after calving, as revealed by the greater abundance of genes involved in immune system adaptation, regardless of pegbovigrastim treatment. Primiparous cows undergoing a new stress condition with respect to older cows were characterized by leukocytes with a higher inflammatory response. In conclusion, pegbovigrastim led to higher expression levels of most genes involved in the processes investigated, suggesting a thorough activation of the immune machinery during the critical post-partum period.

scholarly journals Virome in the Lungs: The Role of Anelloviruses in Childhood Respiratory Diseases

2021 ◽  
Vol 9 (7) ◽  
pp. 1357
Author(s):  
Giulia Dodi ◽  
Marina Attanasi ◽  
Paola Di Filippo ◽  
Sabrina Di Pillo ◽  
Francesco Chiarelli
Keyword(s):  
Immune System ◽  
Respiratory Diseases ◽  
Epidemiological Data ◽  
Chronic Inflammatory Disease ◽  
Molecular Techniques ◽  
Chronic Respiratory Diseases ◽  
Constant Change ◽  
Inflammatory Processes ◽  
Health And Disease

More recently, increasing attention has been directed to exploring the function of the global virome in health and disease. Currently, by new molecular techniques, such as metagenomic DNA sequencing, the virome has been better unveiled. By investigating the human lung virome, we could provide novel insights into respiratory diseases. The virome, as a part of the microbiome, is characterized by a constant change in composition related to the type of diet, environment, and our genetic code, and other incalculable factors. The virome plays a substantial role in modulating human immune defenses and contributing to the inflammatory processes. Anelloviruses (AVs) are new components of the virome. AVs are already present during early life and reproduce without apparently causing harm to the host. The role of AVs is still unknown, but several reports have shown that AVs could activate the inflammasomes, intracellular multiprotein oligomers of the innate immune system, which show a crucial role in the host defense to several pathogens. In this narrative revision, we summarize the epidemiological data related to the possible link between microbial alterations and chronic respiratory diseases in children. Briefly, we also describe the characteristics of the most frequent viral family present in the lung virome, Anelloviridae. Furthermore, we discuss how AVs could modulate the immune system in children, affecting the development of chronic respiratory diseases, particularly asthma, the most common chronic inflammatory disease in childhood.

Dysregulation of synovial fibroblasts in rheumatoid arthritis

2020 ◽  
pp. 55-64
Author(s):  
Thomas Crowley ◽  
Jason D. Turner ◽  
Andrew Filer ◽  
Andy Clark ◽  
Chris Buckley
Keyword(s):  
Rheumatoid Arthritis ◽  
Extracellular Matrix ◽  
Immune System ◽  
Inflammatory Response ◽  
Chronic Inflammation ◽  
Stromal Cells ◽  
Synovial Fibroblasts ◽  
Traditional Role ◽  
Level Of Involvement

Fibroblasts are ubiquitous stromal cells, with populations found in all organs. The traditional role of fibroblasts was thought to be mainly structural; making and modifying extracellular matrix. Taken together the ability of fibroblasts to produce and respond to many factors involved in the immune system indicates the degree to which they are involved in orchestrating the inflammatory response in rheumatoid arthritis (RA). This level of involvement demonstrates the importance of fibroblasts in inflammation and indicates the shift from transient to chronic inflammation in RA could be facilitated in part by synovial fibroblasts. This chapter explores the role of fibroblasts in RA.

Immunopathogenesis of psoriatic arthritis: Recent advances

Open Medicine ◽  
2008 ◽  
Vol 3 (3) ◽  
pp. 245-253
Author(s):  
Panayiotis Stavropoulos ◽  
Andreas Goules ◽  
Georgia Avgerinou ◽  
Andreas Katsambas
Keyword(s):  
Immune System ◽  
Psoriatic Arthritis ◽  
Inflammatory Response ◽  
Adhesion Molecules ◽  
Proinflammatory Cytokines ◽  
Inflammatory Arthritis ◽  
Angiogenic Factors ◽  
Chronic Inflammatory Arthritis ◽  
Immunologic Factors

AbstractPsoriatic Arthritis (PsA) is a chronic inflammatory arthritis associated with psoriasis. The pathophysiology of PsA includes genetic, environmental and immunologic factors. Recent studies revealed the dynamic role of the immune system in the pathogenesis of the disease. Adhesion molecules, proinflammatory cytokines, angiogenic factors and metalloproteinases appear to orchestrate the inflammatory response in PsA. This article summarizes the current immunologic findings and suggests future therapeutic and researching approaches in the field of PsA.

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