scholarly journals Immunosecurity: immunomodulants enhance immune responses in chickens

2021 ◽  
Vol 34 (3) ◽  
pp. 321-337
Author(s):  
Keesun Yu ◽  
Inhwan Choi ◽  
Cheol-Heui Yun
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Foot And Mouth Disease ◽  
African Swine Fever ◽  
Stress Factors ◽  
Growth Promoter ◽  
Nutritional Physiology ◽  
Protein Rich ◽  
The Impact ◽  
Global Population

The global population has increased with swift urbanization in developing countries, and it is likely to result in a high demand for animal-derived protein-rich foods. Animal farming has been constantly affected by various stressful conditions, which can be categorized into physical, environmental, nutritional, and biological factors. Such conditions could be exacerbated by banning on the use of antibiotics as a growth promoter together with a pandemic situation including, but not limited to, African swine fever, avian influenza, and foot-and-mouth disease. To alleviate these pervasive tension, various immunomodulants have been suggested as alternatives for antibiotics. Various studies have investigated how stressors (i.e., imbalanced nutrition, dysbiosis, and disease) could negatively affect nutritional physiology in chickens. Importantly, the immune system is critical for host protective activity against pathogens, but at the same time excessive immune responses negatively affect its productivity. Yet, comprehensive review articles addressing the impact of such stress factors on the immune system of chickens are scarce. In this review, we categorize these stressors and their effects on the immune system of chickens and attempt to provide immunomodulants which can be a solution to the aforementioned problems facing the chicken industry.

scholarly journals Skin Immune Landscape: Inside and Outside the Organism

2017 ◽  
Vol 2017 ◽  
pp. 1-17 ◽  
Author(s):  
Florence Abdallah ◽  
Lily Mijouin ◽  
Chantal Pichon
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Skin Surface ◽  
Negative Influence ◽  
Background Information ◽  
Symbiotic Relationship ◽  
Skin Microbiota ◽  
Effector Cells ◽  
Skin Immune System ◽  
The Impact

The skin is an essential organ to the human body protecting it from external aggressions and pathogens. Over the years, the skin was proven to have a crucial immunological role, not only being a passive protective barrier but a network of effector cells and molecular mediators that constitute a highly sophisticated compound known as the “skin immune system” (SIS). Studies of skin immune sentinels provided essential insights of a complex and dynamic immunity, which was achieved through interaction between the external and internal cutaneous compartments. In fact, the skin surface is cohabited by microorganisms recognized as skin microbiota that live in complete harmony with the immune sentinels and contribute to the epithelial barrier reinforcement. However, under stress, the symbiotic relationship changes into a dysbiotic one resulting in skin disorders. Hence, the skin microbiota may have either positive or negative influence on the immune system. This review aims at providing basic background information on the cutaneous immune system from major cellular and molecular players and the impact of its microbiota on the well-coordinated immune responses in host defense.

scholarly journals A Review of the Role Micronutrient Status in the Elderly Plays in Their Immune Response to Viral Respiratory Infections and the Potential Compromising Effects Medications Might Cause

2020 ◽  
pp. 59-85
Author(s):  
Michael P. Wakeman
Keyword(s):  
Immune System ◽  
Respiratory Infections ◽  
The Elderly ◽  
Micronutrient Status ◽  
Viral Respiratory Infections ◽  
The Impact ◽  
Global Population ◽  
Healthy Immune System ◽  
Viral Respiratory

The elderly are a growing proportion of the global population. They are more susceptible to non-communicable diseases and respiratory viral diseases like influenza and covid19, which may lead to increased levels of morbidity and mortality than those of a younger generation. It is also reported that co-morbidities, especially diabetes, hypertension and coronary heart disease contribute significantly to the prognosis with these types of infections. That the immune system operates in a less efficient way as an individual ages, is now well understood and likely contributes significantly to this situation. The role of certain micronutrients in maintaining a healthy immune system is well recognised and demonstrated to play an important role both in preventing and controlling infection. However, for a number of reasons many elderly individuals have a less than optimal intake of many of the micronutrients that support the immune system. This review examines the contributory roles an aging immune system, suboptimal intake of micronutrients, comorbidities and the impact of the intake of medications typically used to treat them can play in the outcome of viral respiratory infections. It identifies the need for supplementation, especially in the elderly to support the immune system.

scholarly journals Coronavirus Disease 2019 (COVID-19) and Nutritional Status: The Missing Link?

2020 ◽  
Author(s):  
Renata Silverio ◽  
Daniela Caetano Gonçalves ◽  
Márcia Fábia Andrade ◽  
Marilia Seelaender
Keyword(s):  
Body Composition ◽  
Immune System ◽  
Nutritional Status ◽  
Immune Responses ◽  
Lean Mass ◽  
Severe Disease ◽  
Cytokine Storm ◽  
Risk Of Infection ◽  
Elderly Individuals ◽  
The Impact

ABSTRACT Coronavirus disease 2019 (COVID-19) is an emerging disease that has reached pandemic status by rapidly spreading worldwide. Elderly individuals and patients with comorbidities such as obesity, diabetes, and hypertension show a higher risk of hospitalization, severe disease, and mortality by acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. These patients frequently show exacerbated secretion of proinflammatory cytokines associated with an overreaction of the immune system, the so-called cytokine storm. Host nutritional status plays a pivotal role in the outcome of a variety of different infectious diseases. It is known that the immune system is highly affected by malnutrition, leading to decreased immune responses with consequent augmented risk of infection and disease severity. Body composition, especially low lean mass and high adiposity, has consistently been linked to worsened prognosis in many different diseases. In this review, evidence concerning the impact of nutritional status on viral infection outcomes is discussed.

scholarly journals Prenatal stress, anxiety and depression alter transcripts, proteins and pathways associated with immune responses at the maternal-fetal interface

2021 ◽  
Author(s):  
Cristina A Martinez ◽  
Ina Marteinsdottir ◽  
Ann Josefsson ◽  
Gunilla Sydsjö ◽  
Elvar Theodorsson ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Psychiatric Symptoms ◽  
Anxiety And Depression ◽  
Cytokine Signaling ◽  
Control Group ◽  
Index Group ◽  
Immune Related Genes ◽  
The Impact ◽  
Maternal Fetal Interface

Abstract During pregnancy, the immune system is modified to allow developmental developmental tolerance of the semi-allogeneic fetus and placenta to term. Pregnant women suffering from stress, anxiety and depression show dysfunctions of their immune system that may be responsible for fetal and/or newborn disorders, provided that provided that placental gene regulation is compromised. The present study explored the effects of maternal chronic self-perceived stress, anxiety and depression during pregnancy on the expression of immune related-genes and pathways in term placenta. Pregnancies were clinically monitored with the Beck’s Anxiety Inventory (BAI) and Edinburgh Postnatal Depression Scale (EPDS). A cutoff threshold for BAI/EPDS of 10 divided patients into two groups: Index group (≥10, n = 11) and a Control group (<10, n = 11), whose placentae were sampled at delivery. The placental samples were subjected to RNA-Sequencing, demonstrating that stress, anxiety and depression during pregnancy induced a major downregulation of placental transcripts related to immune processes such as T-cell regulation, interleukin and cytokine signaling or innate immune responses. Expression differences of main immune related genes such as CD46, CD15, CD8α & β ILR7α and CCR4 among others, were found in the index group (P < 0.05). Moreover, the key immune-like pathway involved in humoral and cellular immunity named “Primary immunodeficiency” was significantly downregulated in the index group compared to controls. Our results show that mechanisms ruling immune system functions are compromised at the maternal-fetal interface following self-perceived depressive symptoms and anxiety during pregnancy. These findings may help unveil mechanisms ruling the impact of maternal psychiatric symptoms and lead to new prevention/intervention strategies in complicated pregnancies.

scholarly journals Antibiotics Against COVID-19 and Mitochondria? Urgent Thinking Out of the Box

2020 ◽  
Author(s):  
Jaroslaw Tyszka ◽  
Karolina Kobos ◽  
Aleksandra Tyszka
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Viral Infections ◽  
Treatment Strategies ◽  
Local Health ◽  
Antiviral Immune Response ◽  
Health Authorities ◽  
Treatment Data ◽  
The Moment ◽  
The Impact

Italian, Spanish, French vs German, Austrian or Norwegian COVID-19 tracks? Antibiotics might have a partial impact on COVID-19 death rates in various countries. Our working hypotheses based on recent publications is that that antibiotics may be a major factor that negatively affects patients’ immune system during viral infections. We are all aware that there is no specific and effective medical treatment for COVID-19 so far. However, we know that our immune system is the only efficient weapon that fights against this syndrome right now. In fact, antibiotics are very often prescribed to prevent secondary infections following an antiviral immune response. Various antibiotic therapies have also been commonly applied to support COVID-19 treatments in China and Italy. Unfortunately, the frequent antibiotic off-site targets include mitochondria that are genetically and evolutionary closely linked to bacteria. Mitochondria are multifunctional organelles responsible for bioenergetics in nearly all our cells, acting as signaling hubs in antiviral and antibacterial immune responses. Several studies have demonstrated that mitochondria are vulnerable to antibacterial treatments, interrupting their physiology. Inhibition of these processes by antibiotics might render the immune system less capable of fighting acute COVID-19 viral infections. Some antibiotics, including those prescribed for COVID-19 in Wuhan, have been shown to inhibit the synthesis of mitochondrial DNA. The question is whether antibiotics support such a treatment or weaken patient immune responses in this case. This hypothesis should be evaluated based on comparative clinical data that seem to be unavailable at the moment. Possibly the COVID-19 risk group should be extended to all patients being treated with antibiotics, including those who finished antibiotic therapies days up to several months before SARS-CoV-2 infection. We therefore urge health service response groups to evaluate the impact of antibiotics on COVID-19 recovery vs death retrospective data. We would like to motivate international, national and local health authorities to share available clinical treatment data, discuss and optimize treatment strategies.

scholarly journals EFFECT OF LOW-FREQUENCY ELECTROMAGNETICS (LFE) ON MUSCLE SATELLITE CELLS DIFFERENTIATION AND IMMUNE SYSTEM IN RAT

2021 ◽  
Author(s):  
JIAQI BI ◽  
HONG JING ◽  
CHENLIANG ZHOU ◽  
PENG GAO ◽  
FUJUN HAN ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Muscle Cell ◽  
Satellite Cells ◽  
Low Frequency ◽  
High Energy ◽  
Low Energy ◽  
Muscle Satellite Cells ◽  
Cord Injury ◽  
The Impact

Spinal cord injury (SCI) is a severe neurological disease. Although surgery within 8[Formula: see text]h after SCI can substantially reduce paraplegia, most patients still suffer from hypomusculariasis after neuron recovery, which results in insufficient lower limb muscles to support bodyweight. Currently, there is no effective method to prevent muscle atrophy. Previous studies have shown that low-frequency electromagnetics (LFE) can stimulate the differentiation, proliferation and fusion of muscle satellite cells, however, the optimal electromagnetic strength and effects on the immune system have not been established. Here, we investigated the influence of LFE at different electromagnetic strengths on muscle cell recovery and assessed the impact of chronic LFE on the immune system of SCI rats. The rat immune system was rapidly activated after SCI. High-energy LFE provoked intensive immune responses, while low-energy LFE did not affect immune responses. Simultaneously, LFE effectively prevented myotube reduction and atrophy in SCI rats. The mRNA and protein levels of Pax7 and MyoD were increased after LFE at both high and low electromagnetic strengths, with the latter leading to more robust increases. Indeed, LFE remarkably induced muscle cell fusion. Together, our results demonstrated that LFE activates muscle satellite cells via stimulating myogenic factors. Chronic low-energy LFE is a safe therapy with no adverse impact on the immune system of SCI rats. LFE with 1.5 mT energy should be considered as an optimal therapeutic strategy.

scholarly journals Selection of adjuvants in the design of an inactivated vaccine against respiratory infections of cattle

2021 ◽  
Author(s):  
A.V. Prytychenko ◽  
P.A. Krasochko ◽  
N.K. Eremets ◽  
O.V. Provotorova
Keyword(s):  
Immune System ◽  
Infectious Diseases ◽  
Respiratory Diseases ◽  
Stress Factors ◽  
Farm Animals ◽  
Industrial Technology ◽  
Viral Diarrhea ◽  
Intensive Exploitation ◽  
The Impact ◽  
Selection Of

Infectious diseases of young farm animals are a serious problem for the livestock industry. Modern industrial technology of keeping animals, contributing to the emergence of viral diseases, often leads to a decrease in the immunological reactivity of their body, due to the underdevelopment of the immune system of young animals (primary immunodeficiency), food toxicosis, insufficient and unbalanced in various components feeding, as well as the impact of stress factors inherent in industrial technology – rearing animals, transportation, microclimate changing, forming large groups of animals, small feeding area, intensive exploitation. These factors negatively affect the immune system and metabolic processes, which leads to a significant decrease in their resistance to infectious diseases. In turn, the causative agents of viral respiratory diseases inhibit the cellular and humoral components of the immune system. Epizootological monitoring shows that viruses of infectious rhinotracheitis, viral diarrhea, parainfluenza-3 and respiratory syncytial infection in cattle are the main cause of pathological processes in respiratory diseases of young animals. Animal specific prophylactic methods are effective in preventing infectious diseases. Immunization of a pregnant herd promotes the birth of young animals with a full-fledged immune system. In mixed infections, it is difficult to determine the leading role of a particular infectious agent, therefore the most effective method for preventing such diseases is associated vaccines. In the process of designing a vaccine, the selection of antigens and an adjuvant is of great importance, contributing to the formation of a specific and long-term immunity. We studied the comparative efficacy of adjuvants and the antigenic activity of the selected viral strains of infectious rhinotracheitis, viral diarrhea, parainfluenza-3 and respiratory syncytial infection of cattle. The dynamics of biosynthesis of antiviral antibodies after immunization in cows were determined.

scholarly journals Immune Modulation by Volatile Anesthetics

2016 ◽  
Vol 125 (2) ◽  
pp. 399-411 ◽  
Author(s):  
Lindsay M. Stollings ◽  
Li-Jie Jia ◽  
Pei Tang ◽  
Huanyu Dou ◽  
Binfeng Lu ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Immune Modulation ◽  
Perioperative Management ◽  
Volatile Anesthetics ◽  
General Anesthetics ◽  
Adaptive Immune ◽  
Clinical Anesthesia ◽  
Clinical Conditions ◽  
The Impact

Abstract Volatile general anesthetics continue to be an important part of clinical anesthesia worldwide. The impact of volatile anesthetics on the immune system has been investigated at both mechanistic and clinical levels, but previous studies have returned conflicting findings due to varied protocols, experimental environments, and subject species. While many of these studies have focused on the immunosuppressive effects of volatile anesthetics, compelling evidence also exists for immunoactivation. Depending on the clinical conditions, immunosuppression and activation due to volatile anesthetics can be either detrimental or beneficial. This review provides a balanced perspective on the anesthetic modulation of innate and adaptive immune responses as well as indirect effectors of immunity. Potential mechanisms of immunomodulation by volatile anesthetics are also discussed. A clearer understanding of these issues will pave the way for clinical guidelines that better account for the impact of volatile anesthetics on the immune system, with the ultimate goal of improving perioperative management.

scholarly journals Early-Life Immune System Maturation in Chickens Using a Synthetic Community of Cultured Gut Bacteria

mSystems ◽  
2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Christian Zenner ◽  
Thomas C. A. Hitch ◽  
Thomas Riedel ◽  
Esther Wortmann ◽  
Stefan Tiede ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Gut Microbiome ◽  
Bacterial Species ◽  
Animal Health ◽  
Gut Bacteria ◽  
Microbial Colonization ◽  
Rrna Gene ◽  
Colonization Resistance ◽  
The Impact

ABSTRACT The gut microbiome is crucial for both maturation of the immune system and colonization resistance against enteric pathogens. Although chicken are important domesticated animals, the impact of their gut microbiome on the immune system is understudied. Therefore, we investigated the effect of microbiome-based interventions on host mucosal immune responses. Increased levels of IgA and IgY were observed in chickens exposed to maternal feces after hatching compared with strict hygienic conditions. This was accompanied by increased gut bacterial diversity as assessed by 16S rRNA gene amplicon sequencing. Cultivation work allowed the establishment of a collection of 43 bacterial species spanning 4 phyla and 19 families, including the first cultured members of 3 novel genera and 4 novel species that were taxonomically described. This resource is available at www.dsmz.de/chibac. A synthetic community consisting of nine phylogenetically diverse and dominant species from this collection was designed and found to be moderately efficient in boosting immunoglobulin levels when provided to chickens early in life. IMPORTANCE The immune system plays a crucial role in sustaining animal health. Its development is markedly influenced by early microbial colonization of the gastrointestinal tract. As chicken are fully dependent on environmental microbes after hatching, extensive hygienic measures in production facilities are detrimental to the microbiota, resulting in low colonization resistance against pathogens. To combat enteric infections, antibiotics are frequently used, which aggravates the issue by altering gut microbiota colonization. Intervention strategies based on cultured gut bacteria are proposed to influence immune responses in chicken.

Factors Influencing Academic Stress on Students of University of Economics and Business - Vietnam National University

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Nham Phong Tuan ◽  
Nguyen Ngoc Quy ◽  
Nguyen Thi Thanh Huyen ◽  
Hong Tra My ◽  
Tran Nhu Phu
Keyword(s):  
Academic Stress ◽  
Stress Factors ◽  
Negative Effects ◽  
Cross Sectional ◽  
Stress Scale ◽  
Perceptions And Attitudes ◽  
National University ◽  
Questionnaire Surveys ◽  
The University ◽  
The Impact

The objective of this study is to investigate the impact of seven factors causing academic stress on students of University of Economics and Business - Vietnam National University: Lack of leisure time, Academic performance, Fear of failure, Academic overload, Finances, Competition between students, Relationships with university faculty. Based on the results of a practical survey of 185 students who are attending any courses at the University of Economics and Business - Vietnam National University, the study assesses the impact of stress factors on students. The thesis focuses on clarifying the concept of "stress" and the stress level of students, while pointing out its negative effects on students. This study includes two cross-sectional questionnaire surveys. The first survey uses a set of 16 questions to assess students’ perceptions and attitudes based on an instrument to measure academic stress - Educational Stress Scale for Adolescents (ESSA). The second survey aims to test internal consistency, the robustness of the previously established 7-factor structure. Henceforth, the model was brought back and used qualitatively, combined with Cronbach’s Alpha measurement test and EFA discovery factor analysis. This study was conducted from October 2019 to December 2019. From these practical analyzes, several proposals were made for the society, the school and the students themselves.

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