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Topic Review
Tumor-Associated Macrophages in Bladder Cancer
Tumor-associated macrophages (TAMs) play major roles in solid tumor development. They can have both anti-tumor and pro-tumor properties depending on their polarization.
  • 1.2K
  • 29 Mar 2022
Topic Review
ZIKA Virus and Male Infertility
Zika virus (ZIKV) has been reported by several groups as an important virus causing pathological damage in the male reproductive tract. ZIKV can infect and persist in testicular somatic and germ cells, as well as spermatozoa, leading to cell death and testicular atrophy. ZIKV has also been detected in semen samples from ZIKV-infected patients. This has huge implications for human reproduction. Global scientific efforts are being applied to understand the mechanisms related to arboviruses persistency, pathogenesis, and host cellular response to suggest a potential target to develop robust antiviral therapeutics and vaccines. Here, we discuss the cellular modulation of the immunologic and physiologic properties of the male reproductive tract environment caused by arboviruses infection, focusing on ZIKV. We also present an overview of the current vaccine effects and therapeutic targets against ZIKV infection that may impact the testis and male fertility.
  • 1.2K
  • 01 Nov 2020
Topic Review
TNBS-Induced Colitis in Brief
Inflammatory bowel disease (IBD) encompasses a group of chronic inflammatory disorders of the gastrointestinal tract, including Crohn's disease and ulcerative colitis. To advance our understanding of IBD pathogenesis and develop effective treatments, reliable experimental models are essential. Trinitrobenzenesulfonic acid (TNBS)-induced colitis is one such model that has significantly contributed to our comprehension of mucosal immune responses and potential therapeutic interventions. This research explores the utility of the TNBS-induced colitis model, encompassing its methods of induction, histopathological features, immune responses, and applications in drug development. While this model offers valuable insights into IBD, it presents certain limitations that researchers must consider. By providing an in-depth analysis of TNBS-induced colitis, this research highlights its significance in advancing IBD research and the quest for improved therapies.
  • 1.2K
  • 08 Oct 2023
Topic Review
Specialized Pro-Resolving Lipid Mediators
Resolvins (Rvs), Maresins (MaRs), Protectins (PDs), and Lipoxins (LXs), belong to a large group of molecules known as The Specialized Pro-resolving Lipid Mediators (SPMs). These compounds have been well-characterized since their identification as potent modulators of the immune response and for their effects on inflammation resolution. Furthermore, they have a potential effect on anti-tumor immunity.
  • 1.2K
  • 17 Aug 2023
Topic Review
Mitogen-Activated Protein Kinases
Influenza A viral (IAV) infections are common, yet persistent as one of the major contributors towards respiratory viral diseases. With the complete eradication of IAVs seemingly impossible, IAV infections are of major public health concern globally as evident by the need for constant surveillance and vaccine renewals. This entry focuses on the innate immune response against influenza infections and in particular, the roles of mitogen-activated protein kinases (MAPKs) in this response. We first detailed the conventional methods of pathogen recognition of influenza viruses by pathogen recognition receptors (PRRs), leading to the activation of pathways involved in the anti-viral response. Predominantly, we have highlighted the roles that MAPKs (ERK, p38 and JNK) play in the activation of Type I Interferons (IFNs) and pro-inflammatory cytokines to resolve IAV infections. Taking a step further, we also looked at how highly pathogenic influenza A viruses (HPIAVs), as well as aberrant and dysfunctional signalling of the MAPK pathways may lead to a hyperactive immune response that is unwarranted, leading to the progression into acute lung injuries and acute respiratory distress syndrome (ARDS) from a simple infection. Taken together, we hope that this entry may shed some light on the important roles that MAPKs play in the innate immune response towards IAV infections, and to provide important considerations when tackling this global challenge.
  • 1.2K
  • 26 Oct 2020
Topic Review
T Cell Immunotherapy in Acute Myeloid Leukemia
Acute myeloid leukemia (AML) is a heterogeneous disease associated with various alterations in T cell phenotype and function leading to an abnormal cell population, ultimately leading to immune exhaustion. However, restoration of T cell function allows for the execution of cytotoxic mechanisms against leukemic cells in AML patients. Therefore, long-term disease control, which requires multiple therapeutic approaches, includes those aimed at the re-establishment of cytotoxic T cell activity. AML treatments that harness the power of T lymphocytes against tumor cells have rapidly evolved over the last 3 to 5 years through various stages of preclinical and clinical development. These include tissue-infiltrated lymphocytes (TILs), bispecific antibodies, immune checkpoint inhibitors (ICIs), chimeric antigen receptor T (CAR-T) cell therapy, and tumor-specific T cell receptor gene-transduced T (TCR-T) cells.
  • 1.2K
  • 24 Dec 2021
Topic Review
Lipids in Macrophages of Different Tissue Location
Lipid metabolism is the major intracellular mechanism driving a variety of cellular functions such as energy storage, hormone regulation and cell division. Lipids, being a primary component of the cell membrane, play a pivotal role in the survival of macrophages. Lipids are crucial for a variety of macrophage functions including phagocytosis, energy balance and ageing. Lipid-loaded macrophages have recently been emerging as a hallmark for several diseases.
  • 1.2K
  • 12 Jan 2023
Topic Review
PD-1 and Its Ligands in Allergy
Programmed cell death 1 (PD-1) and its ligands PD-L1 and PD-L2 are receptors that act in co-stimulatory and coinhibitory immune responses. Signaling the PD-1/PD-L1 or PD-L2 pathway is essential to regulate the inflammatory responses to infections, autoimmunity, and allergies, and it has been extensively studied in cancer.
  • 1.2K
  • 13 Jun 2022
Topic Review
Mechanism of NETosis
Neutrophil extracellular traps (NETs) are net-like structures released from neutrophils. NETs predominantly contain cell-free deoxyribonucleic acid (DNA) decorated with histones and neutrophil granule proteins. Numerous extrinsic and intrinsic stimuli can induce the formation of NETs such as pathogens, cytokines, immune complexes, microcrystals, antibodies, and other physiological stimuli. The mechanism of NETosis induction can either be ROS-dependent or independent based on the catalase producing activity of the pathogen. NADPH is the source of ROS production, which in turn depends on the upregulation of Ca2+ production in the cytoplasm. ROS-independent induction of NETosis is regulated through toll-like receptors (TLRs). Besides capturing and eliminating pathogens, NETs also aggravate the inflammatory response and thus act as a double-edged sword.
  • 1.2K
  • 18 May 2023
Topic Review
CCl4-Induced Liver Injury in Brief
Carbon tetrachloride (CCl4) has been a cornerstone in experimental liver research for decades, providing valuable insights into hepatotoxicity, liver fibrosis, and potential therapeutic interventions. This research explores the utility of the CCl4-induced liver injury model, encompassing its methods of induction, key pathological features, underlying mechanisms, and applications in drug development. While this model offers essential insights into liver disease, it presents certain limitations that researchers must consider. By providing an in-depth analysis of CCl4-induced liver injury, this research highlights its significance in advancing liver research and our understanding of liver pathology and repair.
  • 1.2K
  • 08 Oct 2023
Topic Review
TNF’s Pathway in CD
Crohn’s disease (CD) is a chronic disorder characterized by full thickness patchy inflammation of the gastrointestinal tract. The pathogenesis is multifactorial and involves defective innate immune responses, microbiome alterations, and dysregulated activation of the acquired component of mucosal immunity. One of the molecular mediators that is involved at different levels in the initiation and progression of intestinal inflammation characteristic of CD is tumor necrosis factor (TNF).
  • 1.2K
  • 15 Oct 2021
Topic Review
Fungal Beta-Glucans
The importance of a well-functioning and balanced immune system has become more apparent in recent decades. Various elements have however not yet been uncovered as shown, for example, in the uncertainty on immune system responses to COVID-19. Fungal beta-glucans are bioactive molecules with immunomodulating properties.
  • 1.2K
  • 01 Jun 2021
Topic Review
Neutrophils during Arboviral Infections
Arboviruses are known to cause large-scale epidemics in many parts of the world. These arthropod-borne viruses are a large group consisting of viruses from a wide range of families. The ability of their vector to enhance viral pathogenesis and transmission makes the development of treatments against these viruses challenging. Neutrophils are generally the first leukocytes to be recruited to a site of infection, playing a major role in regulating inflammation and, as a result, viral replication and dissemination. However, the underlying mechanisms through which neutrophils control the progression of inflammation and disease remain to be fully understood. In this review, we highlight the major findings from recent years regarding the role of neutrophils during arboviral infections. We discuss the complex nature of neutrophils in mediating not only protection, but also augmenting disease pathology. Better understanding of neutrophil pathways involved in effective protection against arboviral infections can help identify potential targets for therapeutics. 
  • 1.2K
  • 05 Jul 2021
Topic Review
Immunosurveillance and Immunoediting
The mechanisms by which immune systems identify and destroy tumors, known as immunosurveillance, have been discussed for decades. However, several factors that lead to tumor persistence and escape from the attack of immune cells in a normal immune system have been found. In the process known as immunoediting, tumors decrease their immunogenicity and evade immunosurveillance. Furthermore, tumors exploit factors such as regulatory T cells, myeloid-derived suppressive cells, and inhibitory cytokines that avoid cytotoxic T cell (CTL) recognition. 
  • 1.2K
  • 13 Feb 2023
Topic Review
Adoptive Immunotherapy beyond CAR T-Cells
The aging of the world population leads to a constant increase of cancer-related morbidity and mortality. Treatment of late-stage tumors has become a significant burden on the healthcare system globally. Adoptive cell immunotherapy is supposed to prolong life with cancer and ideally cure cancer after a single infusion of the cell product. Arguably, the most impressive clinical therapy in this field is based on chimeric antigen receptor (CAR) T-cells capable of curing up to 25–50% of previously incurable patients with B-cell malignancies. Diverse cell therapies are already efficiently used in clinics for cancer treatment (such as tumor infiltrating lymphocytes, transgenic αβ T-cells) and several novel promising cell therapies are in development (such as CAR M-cells, transgenic γδ T-cells, CAR NK-cells). Here, we summarize the recent literature data with the focus on T-cell receptor-based therapies and overview the most advanced systems for manufacturing of clinical grade cell products. 
  • 1.2K
  • 22 Dec 2021
Topic Review
Complement System in Alzheimer’s Disease
Alzheimer’s disease is a type of dementia characterized by problems with short-term memory, cognition, and difficulties with activities of daily living. It is a progressive, neurodegenerative disorder. The complement system is an ancient part of the innate immune system and comprises of more than thirty serum and membrane-bound proteins. This system has three different activating pathways and culminates into the formation of a membrane attack complex that ultimately causes target cell lysis (usually pathogens) The complement system is involved in several important functions in the central nervous system (CNS) that include neurogenesis, synaptic pruning, apoptosis, and neuronal plasticity.
  • 1.2K
  • 30 Dec 2021
Topic Review
Immune Cells and Cytokine in Acetaminophen-Induced Liver Injury
Acetyl-para-aminophenol (APAP), a commonly used antipyretic analgesic, is becoming increasingly toxic to the liver, resulting in a high rate of acute hepatic failure in Europe and the United States. Excessive APAP metabolism in the liver develops an APAP–protein adduct, which causes oxidative stress, MPTP opening, and hepatic necrosis. HMGB-1, HSP, nDNA, mtDNA, uric acid, and ATP are DMAPs released during hepatic necrosis. DMAPs attach to TLR4-expressing immune cells such KCs, macrophages, and NK cells, activating them and causing them to secrete cytokines. Immune cells and their secreted cytokines have been demonstrated to have a dual function in acetaminophen-induced liver injury (AILI), with a role in either proinflammation or pro-regeneration, resulting in contradicting findings and some research confusion. Neutrophils, KCs, MoMFs, NK/NKT cells, γδT cells, DCs, and inflammasomes have pivotal roles in AILI.
  • 1.2K
  • 27 Jul 2022
Topic Review
Manipulating Microbiota to Treat Atopic Dermatitis
Atopic dermatitis (AD) is a globally prevalent skin inflammation with a particular impact on children. Current therapies for AD are challenged by the limited armamentarium and the high heterogeneity of the disease. Thus, radically different approaches are needed to address a significant unmet need in AD patients. A novel promising therapeutic target for AD is the microbiota.
  • 1.2K
  • 13 Jun 2022
Topic Review
Mast Cells in Allergy/Inflammation Regulation
It is well known that mast cells (MCs) initiate type I allergic reactions and inflammation in a quick response to the various stimulants, including—but not limited to—allergens, pathogen-associated molecular patterns (PAMPs), and damage-associated molecular patterns (DAMPs). MCs highly express receptors of these ligands and proteases (e.g., tryptase, chymase) and cytokines (TNF), and other granular components (e.g., histamine and serotonin) and aggravate the allergic reaction and inflammation. On the other hand, accumulated evidence has revealed that MCs also possess immune-regulatory functions, suppressing chronic inflammation and allergic reactions on some occasions. IL-2 and IL-10 released from MCs inhibit excessive immune responses. 
  • 1.2K
  • 12 Oct 2021
Topic Review
Saliva-Assisted Transmission
Saliva-assisted transmission (SAT) is defined as the property of tick saliva to enhance the transmission and establishment of tick-borne pathogens. Tick saliva contains multiple biomolecules that act to repress host immune responses, hemostasis, inflammation, and itchiness. These molecules can be exploited by tick-borne pathogens by increasing their expression or directly binding. The focus of this entry is in defining the mechanism that tick-borne pathogens use to subvert tick salivary secretions in their advantage.
  • 1.2K
  • 03 Mar 2021
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