scholarly journals MicroRNAs: Biological Regulators in Pathogen–Host Interactions

Cells ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 113 ◽  
Author(s):  
Stephanie Maia Acuña ◽  
Lucile Maria Floeter-Winter ◽  
Sandra Marcia Muxel
Keyword(s):  
Immune Response ◽  
Infectious Diseases ◽  
Small Rnas ◽  
Immune Cell ◽  
Fine Tuning ◽  
Biological Processes ◽  
Host Interactions ◽  
The Past ◽  
Biological Aspects

An inflammatory response is essential for combating invading pathogens. Several effector components, as well as immune cell populations, are involved in mounting an immune response, thereby destroying pathogenic organisms such as bacteria, fungi, viruses, and parasites. In the past decade, microRNAs (miRNAs), a group of noncoding small RNAs, have emerged as functionally significant regulatory molecules with the significant capability of fine-tuning biological processes. The important role of miRNAs in inflammation and immune responses is highlighted by studies in which the regulation of miRNAs in the host was shown to be related to infectious diseases and associated with the eradication or susceptibility of the infection. Here, we review the biological aspects of microRNAs, focusing on their roles as regulators of gene expression during pathogen–host interactions and their implications in the immune response against Leishmania, Trypanosoma, Toxoplasma, and Plasmodium infectious diseases.

scholarly journals The immune system on the TRAIL of Alzheimer’s disease

2020 ◽  
Vol 17 (1) ◽  
Author(s):  
Chiara Burgaletto ◽  
Antonio Munafò ◽  
Giulia Di Benedetto ◽  
Cettina De Francisci ◽  
Filippo Caraci ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Immune Response ◽  
Nervous System ◽  
Immune Cell ◽  
Adaptive Immune Response ◽  
Fine Tuning ◽  
Normal Brain ◽  
Adaptive Immune

Abstract Alzheimer’s disease (AD) is the most common form of dementia, characterized by progressive degeneration and loss of neurons in specific regions of the central nervous system. Chronic activation of the immune cells resident in the brain, peripheral immune cell trafficking across the blood-brain barrier, and release of inflammatory and neurotoxic factors, appear critical contributors of the neuroinflammatory response that drives the progression of neurodegenerative processes in AD. As the neuro-immune network is impaired in course of AD, this review is aimed to point out the essential supportive role of innate and adaptive immune response either in normal brain as well as in brain recovery from injury. Since a fine-tuning of the immune response appears crucial to ensure proper nervous system functioning, we focused on the role of the TNF superfamily member, TNF-related apoptosis-inducing ligand (TRAIL), which modulates both the innate and adaptive immune response in the pathogenesis of several immunological disorders and, in particular, in AD-related neuroinflammation. We here summarized mounting evidence of potential involvement of TRAIL signaling in AD pathogenesis, with the aim to provide clearer insights about potential novel therapeutic approaches in AD.

scholarly journals Mekanisme Escape dan Respon Imun innate terhadap Candida albicans

2020 ◽  
Vol 9 (1) ◽  
pp. 60
Author(s):  
Putu Oky ari Tania
Keyword(s):  
Immune Response ◽  
Candida Albicans ◽  
Immune System ◽  
Immune Responses ◽  
Immune Cells ◽  
Immune Cell ◽  
Clinical Aspect ◽  
Biological Processes ◽  
Transduction Pathway

Candidiasis is an infection caused by fungal Candida albicans. The incidence of candidiasis is pretty high in Indonesia. Candida albicans develop their pathogenicity by several ways so that it can invade and escape from the immune system. The host’s immune system must always be vigilant to recognized antigen through various receptors, activation of the transduction pathway and activation of various immune cells. But as organisms that struggle to survive, Candida also develops mechanisms to escape the immune response. There are so many articles have written the immune response against candidiasis, this review aims to understand more and updating information about the biological processes of pathogenicity of fungi and the mechanism of Candida albicans in escaping immune responses, the role of each innate molecule and immune cell, and clinical aspect to Candida albicans infections. We already facing the big challenges against therapy of fungal infection, so by understanding the escape mechanism of Candida albicans, it is possible to developed antifungal or Candida vaccine in the future, therefore the incidence of candidiasis can be suppressed.

Vitamin A: dietologist’s position

2020 ◽  
pp. 49-57
Author(s):  
S. V. Orlova ◽  
E. A. Nikitina ◽  
L. I. Karushina ◽  
Yu. A. Pigaryova ◽  
O. E. Pronina
Keyword(s):  
Immune Response ◽  
Urinary Tract ◽  
Gastrointestinal Tract ◽  
Vitamin A ◽  
Developed Countries ◽  
Therapeutic Practice ◽  
The Past ◽  
Increased Risk ◽  
Mucous Membranes

Vitamin A (retinol) is one of the key elements for regulating the immune response and controls the division and differentiation of epithelial cells of the mucous membranes of the bronchopulmonary system, gastrointestinal tract, urinary tract, eyes, etc. Its significance in the context of the COVID‑19 pandemic is difficult to overestimate. However, a number of studies conducted in the past have associated the additional intake of vitamin A with an increased risk of developing cancer, as a result of which vitamin A was practically excluded from therapeutic practice in developed countries. Our review highlights the role of vitamin A in maintaining human health and the latest data on its effect on the development mechanisms of somatic pathology.

scholarly journals miR-146a is a significant brake on autoimmunity, myeloproliferation, and cancer in mice

2011 ◽  
Vol 208 (6) ◽  
pp. 1189-1201 ◽  
Author(s):  
Mark P. Boldin ◽  
Konstantin D. Taganov ◽  
Dinesh S. Rao ◽  
Lili Yang ◽  
Jimmy L. Zhao ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Immune Cell ◽  
Myeloid Cell ◽  
Genetically Engineered ◽  
Biological Processes ◽  
Targeted Deletion ◽  
Genetically Engineered Mice ◽  
Immune Defects ◽  
Molecular Brake

Excessive or inappropriate activation of the immune system can be deleterious to the organism, warranting multiple molecular mechanisms to control and properly terminate immune responses. MicroRNAs (miRNAs), ∼22-nt-long noncoding RNAs, have recently emerged as key posttranscriptional regulators, controlling diverse biological processes, including responses to non-self. In this study, we examine the biological role of miR-146a using genetically engineered mice and show that targeted deletion of this gene, whose expression is strongly up-regulated after immune cell maturation and/or activation, results in several immune defects. Collectively, our findings suggest that miR-146a plays a key role as a molecular brake on inflammation, myeloid cell proliferation, and oncogenic transformation.

scholarly journals Molecular and Clinical Characterization of LAG3 in Breast Cancer Through 2994 Samples

2020 ◽  
Author(s):  
Qiang Liu ◽  
Yihang Qi ◽  
Jie Zhai ◽  
Xiangyi Kong ◽  
Xiangyu Wang ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Immune Response ◽  
Cancer Immunotherapy ◽  
Cancer Patients ◽  
Immune Cell ◽  
Immune Checkpoints ◽  
Cell Populations ◽  
Potential Biomarker ◽  
The Impact

Abstract Background Despite the promising impact of cancer immunotherapy targeting CTLA4 and PD1/PDL1, a large number of cancer patients fail to respond. LAG3 (Lymphocyte Activating 3), also named CD233, is a protein Coding gene served as alternative inhibitory receptors to be targeted in the clinic. The impact of LAG3 on immune cell populations and co-regulation of immune response in breast cancer remained largely unknown. Methods To characterize the role of LAG3 in breast cancer, we investigated transcriptome data and associated clinical information derived from a total of 2994 breast cancer patients. Results We observed that LAG3 was closely correlated with major molecular and clinical characteristics, and was more likely to be enriched in higher malignant subtype, suggesting LAG3 was a potential biomarker of triple-negative breast cancer. Furthermore, we estimated the landscape of relationship between LAG3 and ten types of cell populations in breast cancer. Gene ontology analysis revealed LAG3 were strongly correlated with immune response and inflammatory activities. We investigated the correlation pattern between LAG3 and immune modulators in pan-cancer, especially the synergistic role of LAG3 with other immune checkpoints members in breast cancer. Conclusions LAG3 expression was closely related to malignancy of breast cancer and might serve as a potential biomarker; LAG3 might plays an important role in regulating tumor immune microenvironment, not only T cells, but also other immune cells. More importantly, LAG3 might synergize with CTLA4, PD1/ PDL1 and other immune checkpoints, thereby lending more evidences to combination cancer immunotherapy by targeting LAG3, PD1/PDL1, and CTLA4 together.

scholarly journals Fine-tuning Mast Cells is Essential for the Maintenance and Regulation of the Systemic and Immune Homeostasis

2021 ◽  
Vol 10 (2) ◽  
pp. 60
Author(s):  
Sylvia Frisancho-Kiss
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Scientific Literature ◽  
Fine Tuning ◽  
Viral Reservoir ◽  
Evolutionary Perspective ◽  
Cell Functions ◽  
The Past ◽  
Allergies And Asthma

During the past decades, populous expansion in mast cell scientific literature came forth with more, than forty-four thousand PubMed publications available to date. Such surge is due to the appreciation of the momentous role of mast cells in the evolution of species, in the development and maintenance of vital physiological functions, such as reproduction, homeostasis, and fluids, diverse immunological roles, and the potential of far-reaching effects despite minute numbers. While the emerging knowledge of the importance of mast cells in equilibrium comes of age when looking at the matter from an evolutionary perspective, the recognition of mast cells beyond detrimental performance in allergies and asthma, during protection against parasites, falters. Beyond well known classical functions, mast cells can process and present antigens,can serve as a viral reservoir, can respond to hormones and xenobiotics,initiate antiviral and antibacterial responses, phagocytosis, apoptosis, and participate in important developmental cornerstones. During evolution,upon the development of a sophisticated niche of innate and adaptive cell populations, certain mast cell functions became partially transmutable,yet the potency of mast cells remained considerable. Reviewing mast cells enables us to reflect on the certitude, that our sophisticated, complex physiology is rooted deeply in evolution, which we carry ancient remnants of, ones that may have decisive roles in our functioning. This communication sets out the goal of characterizing mast cells, particularly the aspects less in limelight yet of immense significance, without the aspiration exhaust it all.

scholarly journals CUL4A ubiquitin ligase: a promising drug target for cancer and other human diseases

Open Biology ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 130217 ◽  
Author(s):  
Puneet Sharma ◽  
Alo Nag
Keyword(s):  
Ubiquitin Ligase ◽  
Drug Target ◽  
Critical Role ◽  
Cellular Transformation ◽  
Biological Processes ◽  
Molecular Architecture ◽  
The Past ◽  
Cullin 4A ◽  
Broad Overview

The ability of cullin 4A (CUL4A), a scaffold protein, to recruit a repertoire of substrate adaptors allows it to assemble into distinct E3 ligase complexes to mediate turnover of key regulatory proteins. In the past decade, a considerable wealth of information has been generated regarding its biology, regulation, assembly, molecular architecture and novel functions. Importantly, unravelling of its association with multiple tumours and modulation by viral proteins establishes it as one of the key proteins that may play an important role in cellular transformation. Considering the role of its substrate in regulating the cell cycle and maintenance of genomic stability, understanding the detailed aspects of these processes will have significant consequences for the treatment of cancer and related diseases. This review is an effort to provide a broad overview of this multifaceted ubiquitin ligase and addresses its critical role in regulation of important biological processes. More importantly, its tremendous potential to be exploited for therapeutic purposes has been discussed.

scholarly journals The Immune Response to Tumors as a Tool toward Immunotherapy

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
F. Pandolfi ◽  
R. Cianci ◽  
D. Pagliari ◽  
F. Casciano ◽  
C. Bagalà ◽  
...  
Keyword(s):  
Immune Response ◽  
Monoclonal Antibodies ◽  
Cancer Colorectal ◽  
Immune Cell ◽  
Cytotoxic T Cells ◽  
Tumor Infiltrating Lymphocytes ◽  
Hematologic Malignancies ◽  
The Novel ◽  
Infiltrating Lymphocytes

Until recently cancer medical therapy was limited to chemotherapy that could not differentiate cancer cells from normal cells. More recently with the remarkable mushroom of immunology, newer tools became available, resulting in the novel possibility to attack cancer with the specificity of the immune system. Herein we will review some of the recent achievement of immunotherapy in such aggressive cancers as melanoma, prostatic cancer, colorectal carcinoma, and hematologic malignancies. Immunotherapy of tumors has developed several techniques: immune cell transfer, vaccines, immunobiological molecules such as monoclonal antibodies that improve the immune responses to tumors. This can be achieved by blocking pathways limiting the immune response, such as CTLA-4 or Tregs. Immunotherapy may also use cytokines especially proinflammatory cytokines to enhance the activity of cytotoxic T cells (CTLs) derived from tumor infiltrating lymphocytes (TILs). The role of newly discovered cytokines remains to be investigated. Alternatively, an other mechanism consists in enhancing the expression of TAAs on tumor cells. Finally, monoclonal antibodies may be used to target oncogenes.

scholarly journals Medawar’s PostEra: Galectins Emerged as Key Players During Fetal-Maternal Glycoimmune Adaptation

2021 ◽  
Vol 12 ◽  
Author(s):  
Ellen Menkhorst ◽  
Nandor Gabor Than ◽  
Udo Jeschke ◽  
Gabriela Barrientos ◽  
Laszlo Szereday ◽  
...  
Keyword(s):  
Immune Cell ◽  
Successful Pregnancy ◽  
Fetal Health ◽  
The Past ◽  
Mammalian Embryogenesis ◽  
Carbohydrate Ligands ◽  
Membrane Bound

Lectin-glycan interactions, in particular those mediated by the galectin family, regulate many processes required for a successful pregnancy. Over the past decades, increasing evidence gathered from in vitro and in vivo experiments indicate that members of the galectin family specifically bind to both intracellular and membrane bound carbohydrate ligands regulating angiogenesis, immune-cell adaptations required to tolerate the fetal semi-allograft and mammalian embryogenesis. Therefore, galectins play important roles in fetal development and placentation contributing to maternal and fetal health. This review discusses the expression and role of galectins during the course of pregnancy, with an emphasis on maternal immune adaptions and galectin-glycan interactions uncovered in the recent years. In addition, we summarize the galectin fingerprints associated with pathological gestation with particular focus on preeclampsia.

scholarly journals The Cutaneous Wound Innate Immunological Microenvironment

2020 ◽  
Vol 21 (22) ◽  
pp. 8748
Author(s):  
Stephen Kirchner ◽  
Vivian Lei ◽  
Amanda S. MacLeod
Keyword(s):  
Immune Response ◽  
Wound Repair ◽  
Immune Cell ◽  
Skin Barrier ◽  
Innate Immune ◽  
Immune Microenvironment ◽  
Cell Recruitment ◽  
Adaptive Processes ◽  
Immune Cell Recruitment

The skin represents the first line of defense and innate immune protection against pathogens. Skin normally provides a physical barrier to prevent infection by pathogens; however, wounds, microinjuries, and minor barrier impediments can present open avenues for invasion through the skin. Accordingly, wound repair and protection from invading pathogens are essential processes in successful skin barrier regeneration. To repair and protect wounds, skin promotes the development of a specific and complex immunological microenvironment within and surrounding the disrupted tissue. This immune microenvironment includes both innate and adaptive processes, including immune cell recruitment to the wound and secretion of extracellular factors that can act directly to promote wound closure and wound antimicrobial defense. Recent work has shown that this immune microenvironment also varies according to the specific context of the wound: the microbiome, neuroimmune signaling, environmental effects, and age play roles in altering the innate immune response to wounding. This review will focus on the role of these factors in shaping the cutaneous microenvironment and how this ultimately impacts the immune response to wounding.

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