scholarly journals COMPARATIVE ANALYSIS OF THE IMMUNE RESPONSE OF WORKERS EXPOSED TO VARIOUS PRODUCTION FACTORS

2018 ◽  
Vol 97 (10) ◽  
pp. 905-909 ◽  
Author(s):  
S. I. Kurchevenko ◽  
E. V. Boklazhenko ◽  
Galina M. Bodienkova
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Vinyl Chloride ◽  
Thermal Power ◽  
Allyl Chloride ◽  
Physical Factors ◽  
Metallic Mercury ◽  
Local Vibration ◽  
Production Factors ◽  
The Impact

Introduction. Eastern Siberia is a huge industrial area, which employs about half of the total population living on the territory. The main harmful factors in the production of vinyl chloride and polyvinyl chloride are vinyl chloride and dichloroethane, in the production of caustic - mercury, in the production of epichlorohydrin - epichlorohydrin and allyl chloride; in the aircraft building industry and the production of heat power engineering - vibration and noise. The aim of the work is to give a comparative evaluation of the indices of the immune response in healthy workers exposed to various chemical and physical factors. Material and methods. Immunological examination of 198 healthy workers, exposed mainly to vapors of metallic mercury, vinyl chloride, epichlorohydrin, local vibration, and noise, was carried out. Results. The peculiarities of IgA production in healthy workers in contact with epichlorohydrin, pairs of metallic mercury and noise are revealed. In persons working only with chemical factors, there was a decrease in IgG concentration in comparison with groups of workers in contact with physical factors. In all the examined groups, unidirectional changes were observed, characterized by a decrease in the IgM content. An increase in the levels of AT to DNA in workers exposed to the metal mercury vapor, vinyl chloride, noise and a decrease in workers exposed to local vibration has been established. In addition, there was a significant increase in the levels of AT to native DNA in individuals in contact with noise and a decrease in individuals in contact with epichlorohydrin and vibration. Attention is drawn to the significant elevation in the level of AT to the S-100 protein in healthy workers under the influence of noise relative to the group of workers with vinyl chloride. Discussion. The obtained results prove early changes in the influence of various production factors to indicate changes in the immune system of healthy workers. Conclusion. Data obtained testify to the adaptative-accommodational responses of the immune system to the impact of industrial hazards and depend on the specificity of the influencing factor. The most pronounced changes in immunoreactivity were found in working in the production of caustic and at the thermal power plant.

scholarly journals The Role of Micronutrients in Support of the Immune Response against Viral Infections

Nutrients ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 3198 ◽  
Author(s):  
Francesco Pecora ◽  
Federica Persico ◽  
Alberto Argentiero ◽  
Cosimo Neglia ◽  
Susanna Esposito
Keyword(s):  
Fatty Acids ◽  
Immune Response ◽  
Immune System ◽  
Viral Infections ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Optimal Function ◽  
The Impact

Viral infections are a leading cause of morbidity and mortality worldwide, and the importance of public health practices including handwashing and vaccinations in reducing their spread is well established. Furthermore, it is well known that proper nutrition can help support optimal immune function, reducing the impact of infections. Several vitamins and trace elements play an important role in supporting the cells of the immune system, thus increasing the resistance to infections. Other nutrients, such as omega-3 fatty acids, help sustain optimal function of the immune system. The main aim of this manuscript is to discuss of the potential role of micronutrients supplementation in supporting immunity, particularly against respiratory virus infections. Literature analysis showed that in vitro and observational studies, and clinical trials, highlight the important role of vitamins A, C, and D, omega-3 fatty acids, and zinc in modulating the immune response. Supplementation with vitamins, omega 3 fatty acids and zinc appears to be a safe and low-cost way to support optimal function of the immune system, with the potential to reduce the risk and consequences of infection, including viral respiratory infections. Supplementation should be in addition to a healthy diet and fall within recommended upper safety limits set by scientific expert bodies. Therefore, implementing an optimal nutrition, with micronutrients and omega-3 fatty acids supplementation, might be a cost-effective, underestimated strategy to help reduce the burden of infectious diseases worldwide, including coronavirus disease 2019 (COVID-19).

scholarly journals The Impact of Biomaterial Cell Contact on the Immunopeptidome

2020 ◽  
Vol 8 ◽  
Author(s):  
Michael Ghosh ◽  
Hanna Hartmann ◽  
Meike Jakobi ◽  
Léo März ◽  
Leon Bichmann ◽  
...  
Keyword(s):  
Immune Response ◽  
Stainless Steel ◽  
Immune System ◽  
Cellular Stress ◽  
Test System ◽  
Surrounding Tissue ◽  
Cell Contact ◽  
Highly Sensitive ◽  
The Impact

Biomaterials play an increasing role in clinical applications and regenerative medicine. A perfectly designed biomaterial should restore the function of damaged tissue without triggering an undesirable immune response, initiate self-regeneration of the surrounding tissue and gradually degrade after implantation. The immune system is well recognized to play a major role in influencing the biocompatibility of implanted medical devices. To obtain a better understanding of the effects of biomaterials on the immune response, we have developed a highly sensitive novel test system capable of examining changes in the immune system by biomaterial. Here, we evaluated for the first time the immunopeptidome, a highly sensitive system that reflects cancer transformation, virus or drug influences and passes these cellular changes directly to T cells, as a test system to examine the effects of contact with materials. Since monocytes are one of the first immune cells reacting to biomaterials, we have tested the influence of different materials on the immunopeptidome of the monocytic THP-1 cell line. The tested materials included stainless steel, aluminum, zinc, high-density polyethylene, polyurethane films containing zinc diethyldithiocarbamate, copper, and zinc sulfate. The incubation with all material types resulted in significantly modulated peptides in the immunopeptidome, which were material-associated. The magnitude of induced changes in the immunopeptidome after the stimulation appeared comparable to that of bacterial lipopolysaccharides (LPS). The source proteins of many detected peptides are associated with cytotoxicity, fibrosis, autoimmunity, inflammation, and cellular stress. Considering all tested materials, it was found that the LPS-induced cytotoxicity-, inflammation- and cellular stress-associated HLA class I peptides were mainly induced by aluminum, whereas HLA class II peptides were mainly induced by stainless steel. These findings provide the first insights into the effects of biomaterials on the immunopeptidome. A more thorough understanding of these effects may enable the design of more biocompatible implant materials using in vitro models in future. Such efforts will provide a deeper understanding of possible immune responses induced by biomaterials such as fibrosis, inflammation, cytotoxicity, and autoimmune reactions.

scholarly journals Suppression of the Peripheral Immune System Limits the Central Immune Response Following Cuprizone-Feeding: Relevance to Modelling Multiple Sclerosis

Cells ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1314 ◽  
Author(s):  
Sen ◽  
Almuslehi ◽  
Gyengesi ◽  
Myers ◽  
Shortland ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Immune Response ◽  
Immune System ◽  
Adaptive Immune System ◽  
Synaptic Function ◽  
Adaptive Immune ◽  
Splenic Atrophy ◽  
The Impact ◽  
The Brain ◽  
Inside Out

Cuprizone (CPZ) preferentially affects oligodendrocytes (OLG), resulting in demyelination. To investigate whether central oligodendrocytosis and gliosis triggered an adaptive immune response, the impact of combining a standard (0.2%) or low (0.1%) dose of ingested CPZ with disruption of the blood brain barrier (BBB), using pertussis toxin (PT), was assessed in mice. 0.2% CPZ(±PT) for 5 weeks produced oligodendrocytosis, demyelination and gliosis plus marked splenic atrophy (37%) and reduced levels of CD4 (44%) and CD8 (61%). Conversely, 0.1% CPZ(±PT) produced a similar oligodendrocytosis, demyelination and gliosis but a smaller reduction in splenic CD4 (11%) and CD8 (14%) levels and no splenic atrophy. Long-term feeding of 0.1% CPZ(±PT) for 12 weeks produced similar reductions in CD4 (27%) and CD8 (43%), as well as splenic atrophy (33%), as seen with 0.2% CPZ(±PT) for 5 weeks. Collectively, these results suggest that 0.1% CPZ for 5 weeks may be a more promising model to study the ‘inside-out’ theory of Multiple Sclerosis (MS). However, neither CD4 nor CD8 were detected in the brain in CPZ±PT groups, indicating that CPZ-mediated suppression of peripheral immune organs is a major impediment to studying the ‘inside-out’ role of the adaptive immune system in this model over long time periods. Notably, CPZ(±PT)-feeding induced changes in the brain proteome related to the suppression of immune function, cellular metabolism, synaptic function and cellular structure/organization, indicating that demyelinating conditions, such as MS, can be initiated in the absence of adaptive immune system involvement.

scholarly journals In ovo administration of CpG ODN induces expression of immune response genes in neonatal chicken spleen

2017 ◽  
Vol 61 (4) ◽  
pp. 451-458 ◽  
Author(s):  
Joanna Sajewicz-Krukowska ◽  
Monika Olszewska-Tomczyk ◽  
Katarzyna Domańska-Blicharz
Keyword(s):  
Immune Response ◽  
Immune System ◽  
High Dose ◽  
Cpg Odn ◽  
In Ovo ◽  
Chicken Spleen ◽  
Class B ◽  
Synthetic Ligand ◽  
The Impact ◽  
Experimental Group

AbstractIntroduction:Due to their immunostimulatory properties TLR ligands are used prophylactically to protect against a variety of viral and bacterial pathogens in mammals. Knowledge of the molecular and functional aspects of TLRs is essential for a better understanding of the immune system and resistance to diseases in birds. For that reason, this study attempted to determine the impact of TLR21 stimulation by its synthetic ligand (CpG ODN, class B) on the chicken immune system.Material and Methods:Sixty embryonated chicken eggs were randomly allocated into three groups (control and two experimental groups). On day 18 of embryonic development, chickens in one experimental group were administeredin ovoa low dose of CpG ODN and the birds of the second experimental group were given a high dose of the ligand. Spleens were collected at 1, 2, 5, and 10 days post-hatching (dph) for analysis of IFN-α, IFN-β, IFN-γ, IL-6, and IL-10 expression using qRT-PCR.Results:Significant differences were observed in mRNA expression levels of all the measured cytokines associated with the modulation and regulation of the immune response at different time points.Conclusion:The obtained data clearly demonstrate that immune response induction takes place afterin ovoadministration of class B CpG ODN, and that the ligand has the ability to induce cytokine responses in neonatal chicken spleen.

C3 Modulates RBC Antigen to Negatively Regulate Antibody Response

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 22-22 ◽  
Author(s):  
Amanda Mener ◽  
Connie M. Arthur ◽  
Seema R. Patel ◽  
Sean R. Stowell
Keyword(s):  
Flow Cytometry ◽  
Immune Response ◽  
Immune System ◽  
Western Blot ◽  
Antibody Production ◽  
Potential Impact ◽  
The Impact ◽  
Complement Deposition ◽  
Rbc Transfusion ◽  
Over Time

Abstract Background:Red blood cell (RBC) transfusion can result in the development of alloantibodies that can make it difficult to find compatible RBCs for future transfusions and increase the risk of hemolytic transfusion reactions. Despite the consequences of RBC alloimmunization, the factors that regulate this process remain relatively unknown. Recent studies suggest that complement deposition on an antigen surface can significantly enhance the immune response to foreign antigen. As many anti-RBC alloantibodies fix complement and RBCs otherwise lack known adjuvants, early antibody-mediated complement deposition may serve as a key regulator that enhances antibody production. To test this, we employed the KEL RBC model system, which employs RBCs that transgenically express the human KEL antigen specifically on RBCs (KEL RBCs). Using this system, we examined the immunological consequence of KEL RBC exposure following transfusion into C57BL/6 wild-type (WT) or complement component 3 (C3) knockout (KO) recipients. Methods: KEL RBCs were transfused into WT or C3 KO recipients, followed by serum collection on days 3, 5, 7, 14, and 21 post-transfusion. Antibody development in WT or C3 KO recipients was examined by flow crossmatch, where serum was incubated with KEL RBCs followed by antibody detection with fluorescently-tagged secondary anti-IgM and anti-IgG antibodies using flow cytometry. To determine the impact of complement deposition on the level of detectable antigen on the RBC surface, RBCs were labeled with the lipophilic dye, DiI, prior to transfusion and then sampled 1, 2, 3, 5, 7 and 9 days post-transfusion. The level of detectable KEL antigen, complement deposition, KEL RBC survival and antibody bound to the RBC surface was measured by flow cytometry. To examine the effect of complement deposition on the level of KEL protein in the RBC membrane post-transfusion, RBCs stroma was isolated at various time points post transfusion, followed by western blot analysis for the KEL protein. Results: While KEL RBCs induced robust anti-KEL antibody formation and C3 deposition in WT recipients, similar exposure to KEL RBCs in C3 KO recipients actually resulted in an unexpected increase in IgM and IgG anti-KEL antibodies when compared to WT recipients. To determine the consequence of C3 deposition, we examined the potential impact of antibody engagement and complement fixation on KEL antigen levels. Consistent with a potential role for complement in directly impacting KEL antigen availability to the immune system, KEL RBCs transferred into WT recipients experienced a decrease in the level of detectable KEL antigen over time that paralleled the development of anti-KEL antibodies and C3 deposition. In contrast, C3 KO recipients failed to experience the same degree of KEL antigen reduction despite the development of significant anti-KEL antibodies over this same time period. Western blot analysis of RBCs post-transfusion revealed that loss of detectable KEL antigen on the RBC surface paralleled a complete lack of detectable KEL antigen in RBC membranes, indicating that C3 may actually facilitate the removal of KEL from the RBC surface. Conclusion: These results suggest an unexpected role for C3 in negatively regulating antibody responses following RBC transfusion. The impact of C3 on the developing alloantibody response strongly suggests that C3-mediated loss of antigen over time likely reduces antigen availability to the immune system, thereby facilitating the inhibition of antibody production over time. These results not only provide novel insight into potential impact of antigen modulation on the development of an immune response to a RBC alloantigen, but also suggest a completely unexpected role for complement in negatively regulating alloantibody production. In doing so, these results suggest that unique differences in complement activity and overall activation following RBC alloantigen exposure between individuals may represent a previously unrecognized factor that influences alloantibody formation following RBC transfusion. Disclosures No relevant conflicts of interest to declare.

scholarly journals The effect of passive exposure to tobacco smoke on the immune response in children with asthma 

2020 ◽  
Author(s):  
Agata Wawrzyniak ◽  
Agnieszka Lipinska-Opalka ◽  
Boleslaw Kalicki ◽  
Malgorzata Kloc
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Tobacco Smoke ◽  
Control Group ◽  
Study Group ◽  
Healthy Children ◽  
Immunomodulatory Effects ◽  
Passive Exposure ◽  
Children With Asthma ◽  
The Impact

Abstract IntroductionThere are a few publications about the impact of tobacco smoke on the children’s immune system. Material and MethodsThe study group consisted of 43 children with asthma.. The control group consisted of 37 healthy children. The exposure to tobacco smoke was assessed by the presence of the cotinine in the urine. ResultsThe group of children with asthma exposed to tobacco smoke had significantly higher levels of the IL-1 and lower levels IL-4 than children not exposed to the passive smoking. The children from the control group exposed to tobacco smoke had a significantly higher concentration of IL-4 than unexposed children. In the whole analyzed population, there was a significant correlation between the presence of cotinine and the concentration of IL-1 and CRP. ConclusionIn this study we found that the passive exposure to tobacco smoke has the immunomodulatory effects on the immune system.

scholarly journals Theoretical Evaluation of the Impact of Hyperthermia in Combination with Radiation Therapy in an Artificial Immune—Tumor-Ecosystem

Cancers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 5764
Author(s):  
Stephan Scheidegger ◽  
Sergio Mingo Barba ◽  
Udo S. Gaipl
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Apoptotic Cell ◽  
Blood Perfusion ◽  
Tumor Control ◽  
Tissue Cell ◽  
Tumor Control Probability ◽  
Theoretical Evaluation ◽  
Adaptive Immune ◽  
The Impact

There is some evidence that radiotherapy (RT) can trigger anti-tumor immune responses. In addition, hyperthermia (HT) is known to be a tumor cell radio-sensitizer. How HT could enhance the anti-tumor immune response produced by RT is still an open question. The aim of this study is the evaluation of potential dynamic effects regarding the adaptive immune response induced by different combinations of RT fractions with HT. The adaptive immune system is considered as a trainable unit (perceptron) which compares danger signals released by necrotic or apoptotic cell death with the presence of tumor- and host tissue cell population-specific molecular patterns (antigens). To mimic the changes produced by HT such as cell radio-sensitization or increase of the blood perfusion after hyperthermia, simplistic biophysical models were included. To study the effectiveness of the different RT+HT treatments, the Tumor Control Probability (TCP) was calculated. In the considered scenarios, the major effect of HT is related to the enhancement of the cell radio-sensitivity while perfusion or heat-based effects on the immune system seem to contribute less. Moreover, no tumor vaccination effect has been observed. In the presented scenarios, HT boosts the RT cell killing but it does not fundamentally change the anti-tumor immune response.

scholarly journals 16 Sulfur amino acid utilization during immune system stimulation in growing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 15-16
Author(s):  
Anoosh Rakhshandeh
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Amino Acid ◽  
Acute Phase Proteins ◽  
Growing Pigs ◽  
Synthesis Rate ◽  
Ileal Digestibility ◽  
Maintenance Requirement ◽  
Elevated Rate ◽  
The Impact

Abstract Immune system stimulation (ISS) modifies protein and amino acid (AA) metabolism in animals and humans. During ISS, AA are redirected away from growth and reproduction towards mounting an immune response. This redirection can impact AA requirements both qualitatively (i.e., the AA ratio) and quantitatively. Special attention has been given to sulfur-containing amino acid (SAA; Met + Cys) metabolism during ISS, due to their roles as precursors for the synthesis of proteins and metabolites that are involved in the immune response. A series of studies were conducted to investigate the impact of ISS on various aspects of SAA utilization, including ileal digestibility, plasma kinetics, the glutathione (GSH) synthesis rate, the irreversible loss of Cys, and dietary total SAA requirements. In all of the studies, pigs were feed restricted (≥ 2 times the maintenance requirement for ME) to eliminate the confounding effect of ISS on feed intake. Results indicated that ISS alters SAA metabolism and increases SAA requirements per unit of protein deposition. The latter occurs due to increased maintenance requirements for SAA during ISS. The results also showed that the enhanced maintenance requirement for SAA occurs mainly as a result of increased SAA utilization, mainly Cys, for the synthesis of immune system metabolites, such as GSH and acute-phase proteins, as well as the increased catabolism of Cys to taurine. In addition, we found that ISS increases the dietary Met-to-total SAA ratio in pigs, suggesting an enhanced preferential demand for dietary Met during ISS, perhaps to support an elevated rate of transsulfuration. Collectively, our findings point toward a need for developing an optimal dietary AA profile for diseased pigs.

scholarly journals COVID-19: human immune response and the influence of food ingredients and active compounds

2021 ◽  
Vol 4 (6) ◽  
pp. 100
Author(s):  
Raphael Ayivi ◽  
Salam Ibrahim ◽  
Heather Colleran ◽  
Roberta Silva ◽  
Leonard Williams ◽  
...  
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Viral Infections ◽  
Critical Element ◽  
Human Immune System ◽  
Active Compounds ◽  
Food Ingredients ◽  
Influence Of Food ◽  
Human Immune ◽  
The Impact

The human immune system is the first line of defense in the prevention of viruses and diseases, and several immune response mechanisms are engaged at the onset of a pathogenic attack. In this review, we elucidate the human immune system as a critical element in protecting humans from COVID-19 by describing the immune process, explaining how the immune system functions, and highlighting the immune system’s global importance in fighting infections. Potential challenges that limit the  proper functioning of the immune system are also discussed. In addition, we address the impact of nutrition on boosting the body’s defenses against COVID-19. For example, some foods and active compounds from food ingredients have been suggested as a way to strengthen the immune system. Physical exercise has also been encouraged as an important way to support the immune response to viral infections. The aim of this review is thus to outline holistic self-defense immunity mechanisms that can help to reduce the risk of viral infections in humans. This review could therefore be used as a comprehensive resource for educating consumers and the general public about measures that can enhance the body’s immune support system as we continue to fight COVID-19 and its variants.Keywords: Immunity, Covid-19 COVID-19, Nutrition, Bioactive compounds, Food Ingredients

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