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Topic Review
Gold Organs in Brucellosis
Brucella is an intracellular bacterium that causes abortion, reproduction failure in livestock and leads to a debilitating flu-like illness with serious chronic complications if untreated in humans. The “gold organs” for nesting Brucella, in which Brucella replicates in cells of the reticular endothelial system, include the spleen, lymph nodes, liver, bone marrow, epididymis, and placenta.
  • 786
  • 19 May 2023
Topic Review
Viral Infections in Severe Asthma
Viral respiratory infections are recognized risk factors for the loss of control of allergic asthma and the induction of exacerbations. Severe asthma is more susceptible to virus-induced asthma exacerbations, especially in the presence of high IgE levels.
  • 785
  • 22 May 2021
Topic Review
Role of Complement System in Alzheimer’s Disease Pathogenesis
As an essential component of the innate immune system, the complement system is responsible for the defense against pathogens. The complement cascade has complex roles in the central nervous system (CNS), numerous reports have implicated the classical complement cascade in both brain development and decline. More specifically, complement dysfunction has been implicated in neurodegenerative disorders, such as Alzheimer’s disease (AD), which is the most common form of dementia. Synapse loss is one of the main pathological hallmarks of AD and correlates with memory impairment. 
  • 785
  • 18 Jan 2024
Topic Review
STING Agonists/Antagonists
The cGAS STING pathway has received much attention in recent years, and it has been recognized as an important component of the innate immune response. Since the discovery of STING and that of cGAS, many observations based on preclinical models suggest that the faulty regulation of this pathway is involved in many type I IFN autoinflammatory disorders. 
  • 784
  • 24 May 2022
Topic Review
Breast Cancer Tumor Microenvironment
Immune therapy is designed to stimulate tumoricidal effects in a variety of solid tumors including breast carcinomas. However, the emergence of resistant clones leads to treatment failure. Understanding the molecular, cellular, and microenvironmental aberrations is crucial to uncovering underlying mechanisms and developing advanced strategies for preventing or combating these resistant malignancies.
  • 783
  • 29 Mar 2022
Topic Review
ATF3 in Inflammation, Apoptosis, Ferroptosis, and Pathogen Infection
Transcription factors are pivotal regulators in the cellular life process. Activating transcription factor 3 (ATF3), a member of the ATF/CREB (cAMP response element-binding protein) family, plays a crucial role as cells respond to various stresses and damage. As a transcription factor, ATF3 significantly influences signal transduction regulation, orchestrating a variety of signaling pathways, including apoptosis, ferroptosis, and cellular differentiation. In addition, ATF3 serves as an essential link between inflammation, oxidative stress, and immune responses. 
  • 783
  • 20 Feb 2024
Topic Review
PNO and PNLA Inhibit the Inflammatory Response
The health implications of pine nuts oil (PNO) and Pinolenic acid (PNLA) in weight reduction, lipid-lowering and anti-diabetic actions as well as in suppression of cell invasiveness and motility in cancer. The expression of many mRNAs and microRNAs was regulated by PNLA indicating potential transcriptional and post-transcriptional regulation of inflammatory and metabolic processes. The anti-inflammatory effects of PNO have been shown in in vitro and in in vivo animal models, which have also been demonstrated with PNLA. Dietary polyunsaturated fatty acids (PUFAs)  impact inflammation by several mechanisms, including altering membrane function and structure, and regulating the synthesis of lipid mediators.
  • 782
  • 14 Feb 2023
Topic Review
Myeloid-Derived Suppressor Cells in Umbilical Cord Blood
Myeloid-derived suppressor cells (MDSCs) represent a heterogeneous population of myeloid cells that suppress immune responses in cancer, infection, and trauma. They mainly act by inhibiting T-cells, natural-killer cells, and dendritic cells, and also by inducing T-regulatory cells, and modulating macrophages. Although they are mostly associated with adverse prognosis of the underlying disease entity, they may display positive effects in specific situations, such as in allogeneic hematopoietic stem cell transplantation (HSCT), where they attenuate graft-versus-host disease (GVHD). They also contribute to the feto-maternal tolerance, and in the fetus growth process, whereas several pregnancy complications have been associated with their defects. Human umbilical cord blood (UCB) is a source rich in MDSCs.
  • 781
  • 18 Mar 2022
Topic Review
Ocular and Oral Microbiome
The immune-privileged healthy eye has a small unique population of microbiota. Typically, ocular microflorae are commensals of low diversity that colonize the external and internal sites of the eye, without instigating any disorders. Any alteration in the symbiotic relationship culminates in the perturbation of ocular homeostasis and shifts the equilibrium toward local or systemic inflammation and, in turn, impaired visual function. A compositional variation in the ocular microbiota is associated with surface disorders such as keratitis, blepharitis, and conjunctivitis, however, studies now implicate non-ocular microbial dysbiosis in glaucoma, age-related macular degeneration (AMD), uveitis, and diabetic retinopathy. A methodical understanding of the mechanisms of invasion and host-microbial interaction is of paramount importance for preventative and therapeutic interventions for vision-threatening conditions.
  • 781
  • 21 Jun 2022
Topic Review
Role of RasGRP1 in Cancer
The dysregulation of RasGRP1 (Ras guanine nucleotide-releasing protein 1) is known to contribute to numerous disorders that range from autoimmune and inflammatory diseases and schizophrenia to neoplasia. Given its position at the crossroad of cell development, inflammation, and cancer, RASGRP1 has garnered interest from numerous disciplines.
  • 781
  • 29 Jan 2023
Topic Review
Sublingual Immunotherapy for Aeroallergens
Sublingual immunotherapy represents an important progress in the use of personalized medicine in children with allergic asthma. It is a viable option for house dust mite driven asthma and in subjects with the asthma associated with allergic rhinitis.
  • 778
  • 08 Feb 2021
Topic Review
Single Domain Antibody in Medicine
The camelid-derived single chain antibody (sdAb), also termed VHH or nanobody, is a unique, functional heavy (H)-chain antibody (HCAb). In contrast to conventional antibodies, sdAb is a unique antibody fragment consisting of a heavy-chain variable domain. It lacks light chains and a first constant domain (CH1). With a small molecular weight of only 12~15 kDa, sdAb has a similar antigen-binding affinity to conventional Abs but a higher solubility, which exerts unique advantages for the recognition and binding of functional, versatile, target-specific antigen fragments. 
  • 778
  • 03 Mar 2023
Topic Review
Effects of Circadian Disruption on Innate Immunity
Circadian rhythms control almost all aspects of physiology and behavior, allowing temporal synchrony of these processes between each other, as well as with the external environment. In the immune system, daily rhythms of leukocyte functions can determine the strength of the immune response, thereby regulating the efficiency of defense mechanisms to cope with infections or tissue injury. The natural light/dark cycle is the prominent synchronizing agent perceived by the circadian clock, but this role of light is highly compromised by irregular working schedules and unintentional exposure to artificial light at night (ALAN).
  • 777
  • 28 Nov 2022
Topic Review
Sphingolipids in Atherosclerosis
Atherosclerosis—a systemic inflammatory disease—is the number one cause of mortality and morbidity worldwide. As such, the prevention of disease progression is of global interest in order to reduce annual deaths at a significant scale. Atherosclerosis is characterized by plaque formation in the arteries, resulting in vascular events such as ischemic stroke or myocardial infarction. Sphingolipids—a lipid class named after the chimeric creature sphinx—are considered to play a critical and, metaphorically, equally chimeric regulatory role in atherogenesis.
  • 776
  • 11 Oct 2022
Topic Review
Indomethacin-Induced Inflammation in Brief
Indomethacin, a non-steroidal anti-inflammatory drug (NSAID), has long been employed to induce inflammation in experimental models. This research explores the utility of indomethacin-induced inflammation as a research tool for studying inflammatory processes and evaluating potential anti-inflammatory agents. 
  • 776
  • 08 Oct 2023
Topic Review
Protein-Based Adjuvants
 New-generation vaccines, formulated with subunits or nucleic acids, are less immunogenic than classical vaccines formulated with live-attenuated or inactivated pathogens. This difference has led to an intensified search for additional potent vaccine adjuvants that meet safety and efficacy criteria and confer long-term protection. Notably, despite structural differences, all protein-based adjuvants (PBAs) show significant immunostimulatory properties, eliciting B-cell- and T-cell-mediated immune responses to administered antigens, providing advantages over many adopted adjuvant approaches. Furthermore, PBAs are natural biocompatible and biodegradable substances that induce minimal reactogenicity and toxicity and interact with innate immune receptors, enhancing their endocytosis and modulating subsequent adaptive immune responses. This entry proposes that PBAs can contribute to the development of vaccines against complex pathogens, including intracellular pathogens such as Mycobacterium tuberculosis, those with complex life cycles such as Plasmodium falciparum, those that induce host immune dysfunction such as HIV, those that target immunocompromised individuals such as fungi, those with a latent disease phase such as Herpes, those that are antigenically variable such as SARS-CoV-2 and those that undergo continuous evolution, to reduce the likelihood of outbreaks.
  • 773
  • 09 Dec 2022
Topic Review
The Role of Mitochondria in Extracellular Trap Formation
Granulocytes (neutrophils, eosinophils, and basophils) are the most abundant circulating cells in the innate immune system. Circulating granulocytes, primarily neutrophils, can cross the endothelial barrier and activate various effector mechanisms to combat invasive pathogens. Eosinophils and basophils also play an important role in allergic reactions and antiparasitic defense. Granulocytes also regulate the immune response, wound healing, and tissue repair by releasing of various cytokines and lipid mediators. The effector mechanisms of granulocytes include the production of reactive oxygen species (ROS), degranulation, phagocytosis, and the formation of DNA-containing extracellular traps.
  • 773
  • 09 Oct 2023
Topic Review
Peripheral Helper T Cells
T-helper (Th)1 and Th17 cells are hypothesized to be pathogenic T cells in RA joints; however, lines of evidence do not fully support this hypothesis, showing polyfunctionality of the T cells. Recent progress in single-cell analysis technology has led to the discovery of a novel helper T-cell subset, peripheral helper T cells, and attracted attention to the previously unappreciated T-cell subsets, such as cytotoxic CD4 and CD8 T cells, in RA joints.
  • 772
  • 24 Apr 2023
Topic Review
Autophagy in Virus Infection
Virus-infected cells trigger a robust innate immune response and facilitate virus replication. Autophagy is a cellular degradation pathway operated at the basal level to maintain homeostasis and is induced by external stimuli for specific functions. The degradative function of autophagy is considered a cellular anti-viral immune response. However, autophagy is a double-edged sword in viral infection; viruses often benefit from it, and the infected cells can also use it to inhibit viral replication. In addition to viral regulation, autophagy pathway proteins also function in autophagy-independent manners to regulate immune responses. Since viruses have co-evolved with hosts, they have developed ways to evade the anti-viral autophagic responses of the cells. 
  • 771
  • 17 Mar 2022
Topic Review
Neutrophil Heterogeneity in Cancer
Neutrophils represent the most abundant cell type of leukocytes in the human blood and have been considered a vital player in the innate immune system and the first line of defense against invading pathogens. Neutrophils play an active role in the immune response during cancer development. They could exhibit both pro-oncogenic and anti-tumor activities under the influence of various mediators in the tumor microenvironment. Neutrophils can be divided into several subpopulations, thus contradicting the traditional concept of neutrophils as a homogeneous population with a specific function in the innate immunity and opening new horizons for cancer therapy. 
  • 769
  • 28 Jan 2023
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