keyword
MENU ▼
Read by QxMD icon Read
search

Immune evasion

keyword
https://www.readbyqxmd.com/read/28932075/role-of-tissue-microenvironment-resident-adipocytes-in-colon-cancer
#1
EDITORIAL
Maria Tabuso, Shervanthi Homer-Vanniasinkam, Raghu Adya, Ramesh P Arasaradnam
Colorectal cancer (CRC) is a multifactorial disease characterized by several genetic and epigenetic alterations occurring in epithelial cells. It is increasingly recognized that tumour progression is also regulated by tumour microenvironment (TME). The bidirectional cross-talk between tumour resident adipocytes and cancer cells within TME has been proposed as active contributor to carcinogenesis. Tumour resident adipocytes exhibit an activated phenotype characterized by increased secretion of pro-tumorigenic factors (angiogenic/inflammatory/immune) which contribute to cancer cell proliferation, invasion, neoangiogenesis, evasion of immune surveillance and therapy resistance...
August 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28931685/p21-restricts-hiv-1-in-monocyte-derived-dendritic-cells-through-the-reduction-of-dntp-biosynthesis-and-regulation-of-samhd1-antiviral-activity
#2
Jose Carlos Valle-Casuso, Awatef Allouch, Annie David, Gina M Lenzi, Lydia Studdard, Françoise Barré-Sinoussi, Michaela Müller-Trutwin, Baek Kim, Gianfranco Pancino, Asier Sáez-Cirión
HIV-1 infection of non-cycling cells, such as dendritic cells (DCs), is impaired due to limited availability of dNTPs, which are needed for HIV-1 reverse transcription. The levels of dNTPs are tightly regulated during cell cycle and depend on the balance between dNTPs biosynthesis and degradation. SAMHD1 potently blocks HIV-1 replication in DCs, although the underlying mechanism is still unclear. SAMHD1 has been reported to be able to degrade dNTPs and viral nucleic acids, which may both hamper HIV-1 reverse transcription...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28931677/structurally-guided-removal-of-deisgylase-biochemical-activity-from-papain-like-protease-originating-from-the-middle-east-respiratory-syndrome-virus
#3
Courtney M Daczkowski, Octavia Goodwin, John V Dzimianski, Jonathan J Farhat, Scott D Pegan
Middle East respiratory syndrome coronavirus (MERS-CoV) is an emerging human pathogen that is the causative agent for Middle East respiratory syndrome (MERS). With MERS outbreaks resulting in over 35% fatalities and now spread to 27 countries, MERS-CoV poses a significant on-going threat to global human health. As part of its viral genome, MERS-CoV encodes for a papain-like protease (PLpro) that has been observed to act as a deubiquitinase and deISGylase to antagonize IFN-I immune pathways. This activity is in addition to its viral polypeptide cleavage function...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28931237/histone-methyltransferase-set8-epigenetically-reprograms-host-immune-responses-to-assist-mycobacterial-survival
#4
Vikas Singh, Praveen Prakhar, R S Rajmani, Kasturi Mahadik, Salik Miskat Borbora, Kithiganahalli Narayanaswamy Balaji
NQO1 and TRXR1 are important host reductases implicated in the regulation of inflammation and apoptosis. Although the transcriptional machinery governing these processes have been extensively investigated, the associated epigenetic regulatory events remain unclear. Here, we report that SET8, a histone H4 lysine 20 monomethylase (H4K20me1), is highly induced during Mycobacterium tuberculosis infection that orchestrates immune evasion strategies through the induction of NQO1 and TRXR1 in vivo. SET8, along with FoxO3a, mediates an active NQO1-PGC1-α complex, which promotes the anti-inflammatory M2 macrophage phenotype, and assists TRXR1-regulated arrest of tumor necrosis factor-related apoptosis-inducing ligand-induced apoptosis...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28926962/anti-nkg2d-mab-a-new-treatment-for-crohn-s-disease
#5
REVIEW
Kasper Vadstrup, Flemming Bendtsen
Crohn's disease (CD) and ulcerative colitis (UC) are immunologically-mediated, debilitating conditions resulting from destructive inflammation of the gastrointestinal tract. The pathogenesis of IBD is incompletely understood, but is considered to be the result of an abnormal immune response with a wide range of cell types and proteins involved. Natural Killer Group 2D (NKG2D) is an activating receptor constitutively expressed on human Natural Killer (NK), γδ T, mucosal-associated invariant T (MAIT), CD56⁺ T, and CD8⁺ T cells...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28924054/immunosurveillance-and-immunoediting-of-breast-cancer-via-class-i-mhc-receptors
#6
Megan M Tu, Mir Munir A Rahim, Celine Sayed, Ahmad Bakur Mahmoud, Andrew P Makrigiannis
Ly49 receptors, which recognize 'self' class I major histocompatibility complex (MHC-I) molecules, enable natural killer (NK) cells to detect loss of MHC-I expression on transformed and virally-infected cells. The impact of NK cell-mediated MHC-I surveillance on immunoediting of breast cancer is still not fully understood. This work assesses the impact of Ly49 receptors on tumor development in terms of cancer control and in driving immune-evading cancer mutations. Genetically modified Ly49-deficient mice and those lacking NK cells through antibody depletion were less able to control E0771-derived mammary tumors in an MHC-I-dependent fashion...
September 18, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28922567/determination-of-pd-l1-expression-in-effusions-from-mesothelioma-by-immuno-cytochemical-staining
#7
Mohammed S I Mansour, Tomas Seidal, Ulrich Mager, Amir Baigi, Katalin Dobra, Annika Dejmek
BACKGROUND: Malignant mesothelioma (MM) is an aggressive, fatal tumor. Current therapeutic options only marginally improve survival. Programmed cell death ligand 1 (PD-L1) is a dominant mediator of immunosuppression, binding to programmed cell death 1 (PD-1). PD-L1 is up-regulated in cancer cells, and the PD-1/PD-L1 pathway plays a critical role in tumor immune evasion, thus providing a target for antitumor therapy. Further, a correlation between PD-L1 expression and prognosis has been reported...
September 18, 2017: Cancer
https://www.readbyqxmd.com/read/28919885/trypanosoma-cruzi-evades-the-complement-system-as-an-efficient-strategy-to-survive-in-the-mammalian-host-the-specific-roles-of-host-parasite-molecules-and-trypanosoma-cruzi-calreticulin
#8
REVIEW
Galia Ramírez-Toloza, Arturo Ferreira
American Trypanosomiasis is an important neglected reemerging tropical parasitism, infecting about 8 million people worldwide. Its agent, Trypanosoma cruzi, exhibits multiple mechanisms to evade the host immune response and infect host cells. An important immune evasion strategy of T. cruzi infective stages is its capacity to inhibit the complement system activation on the parasite surface, avoiding opsonizing, immune stimulating and lytic effects. Epimastigotes, the non-infective form of the parasite, present in triatomine arthropod vectors, are highly susceptible to complement-mediated lysis while trypomastigotes, the infective form, present in host bloodstream, are resistant...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28919545/mechanisms-behind-tb-hbv-and-hiv-chronic-infections
#9
David Durantel, Inca Kusters, Jacques Louis, Nicolas Manel, Tom H M Ottenhoff, Valentina Picot, Mitra Saaadatian-Elahi
Immune evasion is critical for pathogens to maintain their presence within hosts, giving rise to chronic infections. Here, we examine the immune evasion strategies employed by three pathogens with high medical burden, namely, tuberculosis, HIV and HBV. Establishment of chronic infection by these pathogens is a multi-step process that involves an interplay between restriction factor, innate immunity and adaptive immunity. Engagement of these host defences is intimately linked with specific steps within the pathogen replication cycles...
September 13, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28919331/production-and-characterization-of-monoclonal-antibodies-against-cathepsin-b-and-cathepsin-b-like-proteins-of-naegleria-fowleri
#10
Gi-Sang Seong, Hae-Jin Sohn, Heekyoung Kang, Ga-Eun Seo, Jong-Hyun Kim, Ho-Joon Shin
Naegleria fowleri causes fatal primary amoebic meningoencephalitis (PAM) in humans and experimental animals. In previous studies, cathepsin B (nfcpb) and cathepsin B-like (nfcpb-L) genes of N. fowleri were cloned, and it was suggested that refolding rNfCPB and rNfCPB-L proteins could play important roles in host tissue invasion, immune response evasion and nutrient uptake. In this study, we produced anti-NfCPB and anti-NfCPB-L monoclonal antibodies (McAb) using a cell fusion technique, and observed their immunological characteristics...
September 14, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28919159/host-control-of-human-papillomavirus-infection-and-disease
#11
REVIEW
John Doorbar
Most human papillomaviruses cause inapparent infections, subtly affecting epithelial homeostasis, to ensure genome persistence in the epithelial basal layer. As with conspicuous papillomas, these self-limiting lesions shed viral particles to ensure population level maintenance and depend on a balance between viral gene expression, immune cell stimulation and immune surveillance for persistence. The complex immune evasion strategies, characteristic of high-risk HPV types, also allow the deregulated viral gene expression that underlies neoplasia...
August 12, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28917268/targeting-androgen-independent-pathways-new-chances-for-patients-with-prostate-cancer
#12
REVIEW
C Cattrini, E Zanardi, G Vallome, A Cavo, L Cerbone, A Di Meglio, C Fabbroni, M M Latocca, F Rizzo, C Messina, A Rubagotti, P Barboro, F Boccardo
Androgen deprivation therapy (ADT) is the mainstay treatment for advanced prostate cancer (PC). Most patients eventually progress to a condition known as castration-resistant prostate cancer (CRPC), characterized by lack of response to ADT. Although new androgen receptor signaling (ARS) inhibitors and chemotherapeutic agents have been introduced to overcome resistance to ADT, many patients progress because of primary or acquired resistance to these agents. This comprehensive review aims at exploring the mechanisms of resistance and progression of PC, with specific focus on alterations which lead to the activation of androgen receptor (AR)-independent pathways of survival...
October 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28913345/a-yeast-model-for-the-mechanism-of-the-epstein-barr-virus-immune-evasion-identifies-a-new-therapeutic-target-to-interfere-with-the-virus-stealthiness
#13
COMMENT
María José Lista, Rodrigo Prado Martins, Gaelle Angrand, Alicia Quillévéré, Chrysoula Daskalogianni, Cécile Voisset, Marie-Paule Teulade-Fichou, Robin Fåhraeus, Marc Blondel
The oncogenic Epstein-Barr virus (EBV) evades the immune system but has an Achilles heel: its genome maintenance protein EBNA1. Indeed, EBNA1 is essential for viral genome replication and maintenance but also highly antigenic. Hence, EBV evolved a system in which the glycine-alanine repeat (GAr) of EBNA1 limits the translation of its own mRNA at a minimal level to ensure its essential function thereby, at the same time, minimizing immune recognition. Defining intervention points where to interfere with EBNA1 immune evasion is an important step to trigger an immune response against EBV-carrying cancers...
August 31, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28912991/t-cell-histiocyte-rich-large-b-cell-lymphoma-presenting-as-hemophagocytic-lymphohistiocytosis-an-uncommon-presentation-of-a-rare-disease
#14
Uroosa Ibrahim, Gwenalyn Garcia, Amina Saqib, Shafinaz Hussein, Qun Dai
T cell histiocyte rich large B cell lymphoma (THRLBCL) is a rare subtype of non-Hodgkin's lymphoma characterized by malignant B cells with reactive T lymphocytes. The pathophysiology is thought to involve cytokine-mediated evasion of T cell immune response by malignant B cells. It usually presents at an advanced stage with extranodal involvement. An extremely unusual manifestation of the disease is hemophagocytic lymphohistiocytosis (HLH) which is a hyperinflammatory disorder. We present a case of a 43-year-old male who presented with recurrent fever and recent radiologic imaging showing splenomegaly and right inguinal lymphadenopathy...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/28906255/echinococcus-multilocularis-vesicular-fluid-inhibits-activation-and-proliferation-of-natural-killer-cells
#15
Anne-Pauline Bellanger, Valentine Mougey, Jean-Rene Pallandre, Houssein Gbaguidi-Haore, Yann Godet, Laurence Millon
Alveolar echinococcosis is a severe chronic helminthic disease that mimics slow-growing liver cancer. The immune evasion strategy of Echinococcus multilocularis Leuckart, 1863 remains poorly understood. The aim of this study was to investigate in vitro the impact of E. multilocularis vesicular fluid (Em-VF) on peripheral blood mononuclear cells (PBMC) and on natural killer (NK) cells. PBMC and NK cells were exposed to Em-VF (1 µg/ml) during six days. The effect of Em-VF was assessed on CD69, viability and proliferation, and on and transforming growth factor β (TGF-β), interferon γ (IFN-γ), interleukin 17 (IL-17) and interleukin 10, using flow cytometry and ELISA, respectively...
August 25, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28904998/parallel-evolution-of-group-b-streptococcus-hypervirulent-clonal-complex-17-unveils-new-pathoadaptive-mutations
#16
Alexandre Almeida, Isabelle Rosinski-Chupin, Céline Plainvert, Pierre-Emmanuel Douarre, Maria J Borrego, Claire Poyart, Philippe Glaser
Group B Streptococcus (GBS) is a commensal of the gastrointestinal and genitourinary tracts, while a prevailing cause of neonatal disease worldwide. Of the various clonal complexes (CCs), CC17 is overrepresented in GBS-infected newborns for reasons that are still largely unknown. Here, we report a comprehensive genomic analysis of 626 CC17 isolates collected worldwide, identifying the genetic traits behind their successful adaptation to humans and the underlying differences between carriage and clinical strains...
September 2017: MSystems
https://www.readbyqxmd.com/read/28903332/myeloid-derived-suppressor-cell-and-macrophage-exert-distinct-angiogenic-and-immunosuppressive-effects-in-breast-cancer
#17
Zhaoxu Fang, Chengwen Wen, Xiaolan Chen, Rongping Yin, Chenglin Zhang, Xiaohua Wang, Yuhui Huang
The immunosuppressive tumor microenvironment is a key obstacle to hinder a cancer immunotherapy. Myeloid-derived suppressor cells (MDSCs) have been considered as a major player in immunosuppression. In this study, we find that tumor-infiltrating MDSCs (tiMDSCs) are less immunosuppressive than tumor-associated macrophages (TAMs) in multiple murine orthotopic breast tumor models. Compared to TAMs, tiMDSCs produce higher levels of pro-inflammatory factors and lower levels of anti-inflammatory factors. Furthermore, tiMDSCs are preferentially located in hypoxic areas and are more pro-angiogenic than TAMs...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28901902/simian-varicella-virus-inhibits-the-interferon-gamma-signalling-pathway
#18
Werner J D Ouwendijk, Suzanne van Veen, Ravi Mahalingam, Georges M G M Verjans
The alphaherpesvirus simian varicella virus (SVV) causes varicella and zoster in nonhuman primates. Herpesviruses evolved elaborate mechanisms to escape host immunity, but the immune evasion strategies employed by SVV remain ill-defined. We analysed whether SVV impairs the cellular response to key antiviral cytokine interferon-γ (IFNγ). SVV infection inhibited the expression of IFNγ-induced genes like C-X-C motif chemokine 10 and interferon regulatory factor 1. Phosphorylation and nuclear translocation of the signal transducer and activator of transcription 1 (STAT1) was blocked in SVV-infected cells, which did not involve cellular and viral phosphatases...
September 13, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28900197/structural-insights-into-the-middle-east-respiratory-syndrome-coronavirus-4a-protein-and-its-dsrna-binding-mechanism
#19
Maria Batool, Masaud Shah, Mahesh Chandra Patra, Dhanusha Yesudhas, Sangdun Choi
Middle East respiratory syndrome coronavirus (MERS-CoV) has evolved to navigate through the sophisticated network of a host's immune system. The immune evasion mechanism including type 1 interferon and protein kinase R-mediated antiviral stress responses has been recently attributed to the involvement of MERS-CoV protein 4a (p4a) that masks the viral dsRNA. However, the structural mechanism of how p4a recognizes and establishes contacts with dsRNA is not well explained. In this study, we report a dynamic mechanism deployed by p4a to engage the viral dsRNA and make it unavailable to the host immune system...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28900116/response-induced-in-mycoplasma-gallisepticum-under-heat-shock-might-be-relevant-to-infection-process
#20
Ivan Butenko, Anna Vanyushkina, Olga Pobeguts, Daria Matyushkina, Sergey Kovalchuk, Alexey Gorbachev, Nicolay Anikanov, Gleb Fisunov, Vadim Govorun
Despite the fact the term "proteome" was proposed to characterize a set of proteins in one of mycoplasma species, proteome response to various exposures in this bacteria are still obscure. Commonly, authors studying proteomic response on perturbation models in mycoplasmas use single approach and do not confirm their findings by alternative methods. Consequently, the results of proteomic analysis should be validated by complementary techniques. In this study we utilized three complementary approaches (SWATH, MRM, 2D-DIGE) to assess response of Mycoplasma gallisepticum under heat stress on proteomic level and combined these findings with metabolic response and the results of transcriptional profiling...
September 12, 2017: Scientific Reports
keyword
keyword
34948
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"