keyword
MENU ▼
Read by QxMD icon Read
search

Immune evasion

keyword
https://www.readbyqxmd.com/read/28214365/peripheral-blood-leukocytes-show-differential-expression-of-tumour-progression-related-genes-in-colorectal-cancer-patients-who-have-a-postoperative-intra-abdominal-infection-a-prospective-matched-cohort-study
#1
S Alonso, X Mayol, L Nonell, S Salvans, M Pascual, M Pera
AIM: Anastomotic leak is associated with higher rates of recurrence after surgery for colorectal cancer. However, the mechanisms responsible are unknown. We hypothesized that the infection-induced inflammatory response may induce overexpression of tumour progression-related genes in immune cells. The aim was to investigate the effect of postoperative intra-abdominal infection on the gene expression patterns of peripheral blood leukocytes (PBL) after surgery for colorectal cancer. METHODS: Prospective matched cohort study...
February 18, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28213132/surveillance-or-engagement-children-s-conflicts-during-health-maintenance-visits
#2
Sarah Polk, Russell Horwitz, Shaina Longway, Alfonso Bonilla, Kate Fothergill, Marc Karver, Peter Salmon, Lawrence Wissow
OBJECTIVE: School-aged health maintenance visits seek to prevent or intervene early with health issues of life-long importance. Little is known about what children expect to happen in these visits or how they experience them, factors related to their engagement as active collaborators in care. METHODS: Thirty children (53% Latino, 27% African-American and 20% White) age 7-11 years were video recorded during a health maintenance visit and then interviewed while reviewing the videos...
February 14, 2017: Academic Pediatrics
https://www.readbyqxmd.com/read/28210081/role-of-lap-cd4-t-cells-in-the-tumor-microenvironment-of-colorectal-cancer
#3
Wu Zhong, Zhi-Yuan Jiang, Lei Zhang, Jia-Hao Huang, Shi-Jun Wang, Cun Liao, Bin Cai, Li-Sheng Chen, Sen Zhang, Yun Guo, Yun-Fei Cao, Feng Gao
AIM: To investigate the abundance and potential functions of LAP(+)CD4(+) T cells in colorectal cancer (CRC). METHODS: Proportions of LAP(+)CD4(+) T cells were examined in peripheral blood and tumor/paratumor tissues of CRC patients and healthy controls using flow cytometry. Expression of phenotypic markers such as forkhead box (Fox)p3, cytotoxic T-lymphocyte-associated protein (CTLA)-4, chemokine CC receptor (CCR)4 and CCR5 was measured using flow cytometry. LAP(-)CD4(+) and LAP(+)CD4(+) T cells were isolated using a magnetic cell-sorting system and cell purity was analyzed by flow cytometry...
January 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28210075/pancreatic-stellate-cell-pandora-s-box-for-pancreatic-disease-biology
#4
REVIEW
Ratnakar R Bynigeri, Aparna Jakkampudi, Ramaiah Jangala, Chivukula Subramanyam, Mitnala Sasikala, G Venkat Rao, D Nageshwar Reddy, Rupjyoti Talukdar
Pancreatic stellate cells (PSCs) were identified in the early 1980s, but received much attention after 1998 when the methods to isolate and culture them from murine and human sources were developed. PSCs contribute to a small proportion of all pancreatic cells under physiological condition, but are essential for maintaining the normal pancreatic architecture. Quiescent PSCs are characterized by the presence of vitamin A laden lipid droplets. Upon PSC activation, these perinuclear lipid droplets disappear from the cytosol, attain a myofibroblast like phenotype and expresses the activation marker, alpha smooth muscle actin...
January 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28209711/serotype-3-pneumococci-sequester-platelet-derived-human-thrombospondin-1-via-the-adhesin-and-immune-evasion-protein-hic
#5
Ulrike Binsker, Thomas P Kohler, Krystin Krauel, Sylvia Kohler, Johanna Habermeyer, Hansjörg Schwertz, Sven Hammerschmidt
Streptococcus pneumoniae serotype 3 strains emerge frequently within clinical isolates of invasive diseases. Bacterial invasion into deeper tissues is associated with colonization and immune evasion mechanisms. Thus, pneumococci express a versatile repertoire of surface proteins sequestering and interacting specifically with components of the human extracellular matrix and serum. Hic, a PspC-like pneumococcal surface protein possesses vitronectin and Factor H binding activity. Here, we show that heterologously expressed Hic domains interact, similar to the classical PspC molecule, with human matricellular thrombospondin-1 (hTSP-1)...
February 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28208102/oncogenic-growth-factor-signaling-mediating-tumor-escape-from-cellular-immunity
#6
REVIEW
Fernando Concha-Benavente, Robert L Ferris
Unrestrained growth factor signals can promote carcinogenesis, as well as other hallmarks of cancer such as immune evasion. Our understanding of the function and complex regulation of HER family of receptors has led to the development of targeted therapeutic agents that suppress tumor growth. However, these receptors also mediate escape from recognition by the host immune system. We discuss how HER family of oncogenic receptors downregulate tumor antigen presentation and upregulate suppressive membrane-bound or soluble secreted inhibitory molecules that ultimately lead to impaired cellular immunity mediated by cytotoxic T lymphocyte (CTL) recognition...
February 13, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28205579/tim-3-inhibits-macrophage-control-of-listeria-monocytogenes-by-inhibiting-nrf2
#7
Zhiding Wang, Dejun Sun, Guojiang Chen, Ge Li, Shuaijie Dou, Renxi Wang, He Xiao, Chunmei Hou, Yan Li, Jiannan Feng, Beifen Shen, Gencheng Han
T cell immunoglobulin mucin-3 (Tim-3) is an immune checkpoint inhibitor and its dysregulation has been related to T cell tolerance and many immune disorders, such as tumors and infection tolerance. However, the physiopathology roles of Tim-3 in innate immunity remain elusive. Here, we demonstrate that Tim-3 inhibits macrophage phagocytosis of L. monocytogenes by inhibiting the nuclear erythroid 2-related factor 2 (Nrf2) signaling pathway and increases bacterial burden. Tim-3 signaling promotes Nrf2 degradation by increasing its ubiquitination and, as a result, decreasing its nuclear translocation...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28199190/filamentous-hemagglutinin-adhesin-fhab-limits-a-baumannii-biofilm-formation
#8
Shakiba Darwish Alipour Astaneh, Iraj Rasooli, Seyed Latif Mousavi Gargari
Increased resistance and survival, as well as immune evasion, play a significant role in the pathogenicity of Acinetobacter baumannii. Here, we report on the adhesion of the bacterium to epithelial cells and formation of biofilm on abiotic surfaces. We identificed autotransporter (AT) genes that encode homologues (Fha-like) of the two-partner secretion system (TPS) in A.baumannii (ATCC19606) which we designate as FhaB (exoprotein) and FhaC (transporter) and demonstrate that these novel genes, are under the control of distinct regulatable promoters within either the same (FhaBC) or two distinct (FhaB and FhaC) cells...
March 1, 2017: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28198446/a-mutation-identified-in-neonatal-microcephaly-destabilizes-zika-virus-ns1-assembly-in-vitro
#9
Deping Wang, Cheng Chen, Shengnan Liu, Han Zhou, Kailin Yang, Qi Zhao, Xiaoyun Ji, Chen Chen, Wei Xie, Zefang Wang, Li-Zhi Mi, Haitao Yang
An unprecedented epidemic of Zika virus (ZIKV) infection had spread to South and Central America. ZIKV infection was recently confirmed by CDC (the Centers for Disease Control and Prevention) to cause neonatal microcephaly, which posed a significant public health emergency of international concern. No specific vaccines or drugs are currently available to fight ZIKV infection. ZIKV nonstructural protein 1 (NS1) plays an essential role in viral replication and immune evasion. We determined the crystal structure of ZIKV NS1172-352, which forms a head-to-head, symmetric dimer with a unique 14-stranded β-ladder conserved among flaviviruses...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198346/characterization-of-two-new-putative-adhesins-of-leptospira-interrogans
#10
Jupciana M Figueredo, Gabriela H Siqueira, Gisele O de Souza, Marcos B Heinemann, Silvio A Vasconcellos, Erica G B Chapola, Ana L T O Nascimento
We here report the characterization of two novel proteins encoded by the genes LIC11122 and LIC12287, identified in the genome sequences of Leptospira interrogans, annotated, respectively, as a putative sigma factor and a hypothetical protein. The CDSs LIC11122 and LIC12287 have signal peptide SPII and SPI and are predicted to be located mainly at the cytoplasmic membrane of the bacteria. The genes were cloned and the proteins expressed using Escherichia coli. Proteinase K digestion showed that both proteins are surface exposed...
January 2017: Microbiology
https://www.readbyqxmd.com/read/28197139/let-s-tie-the-knot-marriage-of-complement-and-adaptive-immunity-in-pathogen-evasion-for-better-or-worse
#11
REVIEW
Kaila M Bennett, Suzan H M Rooijakkers, Ronald D Gorham
The complement system is typically regarded as an effector arm of innate immunity, leading to recognition and killing of microbial invaders in body fluids. Consequently, pathogens have engaged in an arms race, evolving molecules that can interfere with proper complement responses. However, complement is no longer viewed as an isolated system, and links with other immune mechanisms are continually being discovered. Complement forms an important bridge between innate and adaptive immunity. While its roles in innate immunity are well-documented, its function in adaptive immunity is less characterized...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28196877/using-quantitative-mass-spectrometry-to-better-understand-the-influence-of-genetics-and-nutritional-perturbations-on-the-virulence-potential-of-staphylococcus-aureus
#12
Jessica R Chapman, Divya Balasubramanian, Kayan Tam, Manor Askenazi, Richard Copin, Bo Shopsin, Victor J Torres, Beatrix Ueberheide
Staphylococcus aureus (Sa) is the leading cause of a variety of bacterial infections ranging from superficial skin infections to invasive and life threatening diseases such as septic bacteremia, necrotizing pneumonia, and endocarditis. The success of Sa as a human pathogen is due to its ability to adapt to the environment by changing expression, production, or secretion of virulence factors. Although Sa immune evasion is well-studied, the regulation of virulence factors under different nutrient and growth conditions is still not well understood...
February 14, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28196588/ifnar1-degradation-a-new-mechanism-for-tumor-immune-evasion
#13
Romina E Araya, Romina S Goldszmid
Type I interferons have been shown to play a major role in anti-cancer immunity. In this issue of Cancer Cell, Katlinski et al. describe tumor-induced degradation of type I interferon receptor IFNAR1 chain as a new immune-evasion mechanism in colorectal cancers. Stabilizing IFNAR1 inhibits tumor growth and improves immunotherapy efficacy.
February 13, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28195880/pd-l1-expression-and-intratumoral-heterogeneity-across-breast-cancer-subtypes-and-stages-an-assessment-of-245-primary-and-40-metastatic-tumors
#14
Erik A Dill, Alejandro A Gru, Kristen A Atkins, Lisa A Friedman, Margaret E Moore, Timothy N Bullock, Janet V Cross, Patrick M Dillon, Anne M Mills
Tumor expression of programmed cell death ligand 1 (PD-L1) is associated with immune evasion in a variety of malignancies, including a subset of triple-negative breast carcinomas, and may mark cancers as susceptible to PD-1/PD-L1 inhibitor therapies. We herein characterize PD-L1 expression in breast cancers across the full range of histomorphologies and investigate its intratumoral heterogeneity and fidelity across primaries and metastases. A total of 245 primary and 40 metastatic (20 nodal, 20 distant) breast carcinomas were evaluated with PD-L1 immunohistochemistry on tissue microarray...
March 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28194314/evolutionary-and-functional-implications-of-hypervariable-loci-within-the-skin-virome
#15
Geoffrey D Hannigan, Qi Zheng, Jacquelyn S Meisel, Samuel S Minot, Frederick D Bushman, Elizabeth A Grice
Localized genomic variability is crucial for the ongoing conflicts between infectious microbes and their hosts. An understanding of evolutionary and adaptive patterns associated with genomic variability will help guide development of vaccines and antimicrobial agents. While most analyses of the human microbiome have focused on taxonomic classification and gene annotation, we investigated genomic variation of skin-associated viral communities. We evaluated patterns of viral genomic variation across 16 healthy human volunteers...
2017: PeerJ
https://www.readbyqxmd.com/read/28192531/multi-layered-control-of-galectin-8-mediated-autophagy-during-adenovirus-cell-entry-through-a-conserved-ppxy-motif-in-the-viral-capsid
#16
Charlotte Montespan, Shauna A Marvin, Sisley Austin, Andrew M Burrage, Benoit Roger, Fabienne Rayne, Muriel Faure, Edward M Campell, Carola Schneider, Rudolph Reimer, Kay Grünewald, Christopher M Wiethoff, Harald Wodrich
Cells employ active measures to restrict infection by pathogens, even prior to responses from the innate and humoral immune defenses. In this context selective autophagy is activated upon pathogen induced membrane rupture to sequester and deliver membrane fragments and their pathogen contents for lysosomal degradation. Adenoviruses, which breach the endosome upon entry, escape this fate by penetrating into the cytosol prior to autophagosome sequestration of the ruptured endosome. We show that virus induced membrane damage is recognized through Galectin-8 and sequesters the autophagy receptors NDP52 and p62...
February 13, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28187290/primary-adaptive-and-acquired-resistance-to-cancer-immunotherapy
#17
REVIEW
Padmanee Sharma, Siwen Hu-Lieskovan, Jennifer A Wargo, Antoni Ribas
Cancer immunotherapy can induce long lasting responses in patients with metastatic cancers of a wide range of histologies. Broadening the clinical applicability of these treatments requires an improved understanding of the mechanisms limiting cancer immunotherapy. The interactions between the immune system and cancer cells are continuous, dynamic, and evolving from the initial establishment of a cancer cell to the development of metastatic disease, which is dependent on immune evasion. As the molecular mechanisms of resistance to immunotherapy are elucidated, actionable strategies to prevent or treat them may be derived to improve clinical outcomes for patients...
February 9, 2017: Cell
https://www.readbyqxmd.com/read/28186505/n-glycosylation-of-mouse-trail-r-and-human-trail-r1-enhances-trail-induced-death
#18
Florent Dufour, Thibault Rattier, Sarah Shirley, Gaelle Picarda, Andrei Alexandru Constantinescu, Aymeric Morlé, Al Batoul Zakaria, Guillaume Marcion, Sebastien Causse, Eva Szegezdi, Dirk Michael Zajonc, Renaud Seigneuric, Gilles Guichard, Tijani Gharbi, Fabien Picaud, Guillaume Herlem, Carmen Garrido, Pascal Schneider, Chris Alan Benedict, Olivier Micheau
APO2L/TRAIL (TNF-related apoptosis-inducing ligand) induces death of tumor cells through two agonist receptors, TRAIL-R1 and TRAIL-R2. We demonstrate here that N-linked glycosylation (N-glyc) plays also an important regulatory role for TRAIL-R1-mediated and mouse TRAIL receptor (mTRAIL-R)-mediated apoptosis, but not for TRAIL-R2, which is devoid of N-glycans. Cells expressing N-glyc-defective mutants of TRAIL-R1 and mouse TRAIL-R were less sensitive to TRAIL than their wild-type counterparts. Defective apoptotic signaling by N-glyc-deficient TRAIL receptors was associated with lower TRAIL receptor aggregation and reduced DISC formation, but not with reduced TRAIL-binding affinity...
February 10, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28186488/control-of-immune-ligands-by-members-of-a-cytomegalovirus-gene-expansion-suppresses-natural-killer-cell-activation
#19
Ceri Alan Fielding, Michael P Weekes, Luis V Nobre, Eva Ruckova, Gavin S Wilkie, Joao A Paulo, Chiwen Chang, Nicolás M Suárez, James A Davies, Robin Antrobus, Richard J Stanton, Rebecca J Aicheler, Hester Nichols, Borek Vojtesek, John Trowsdale, Andrew J Davison, Steven P Gygi, Peter Tomasec, Paul J Lehner, Gavin Wg Wilkinson
The human cytomegalovirus (HCMV) US12 family consists of ten sequentially arranged genes (US12-21) with poorly characterized function. We now identify novel NK cell evasion functions for four members: US12, US14, US18 and US20. Using a systematic multiplexed proteomics approach to quantify ~1,300 cell surface and ~7,200 whole cell proteins, we demonstrate that the US12 family selectively targets plasma membrane proteins and plays key roles in regulating NK ligands, adhesion molecules and cytokine receptors...
February 10, 2017: ELife
https://www.readbyqxmd.com/read/28186134/virulence-inhibitors-from-brazilian-peppertree-block-quorum-sensing-and-abate-dermonecrosis-in-skin-infection-models
#20
Amelia Muhs, James T Lyles, Corey P Parlet, Kate Nelson, Jeffery S Kavanaugh, Alexander R Horswill, Cassandra L Quave
Widespread antibiotic resistance is on the rise and current therapies are becoming increasingly limited in both scope and efficacy. Methicillin-resistant Staphylococcus aureus (MRSA) represents a major contributor to this trend. Quorum sensing controlled virulence factors include secreted toxins responsible for extensive damage to host tissues and evasion of the immune system response; they are major contributors to morbidity and mortality. Investigation of botanical folk medicines for wounds and infections led us to study Schinus terebinthifolia (Brazilian Peppertree) as a potential source of virulence inhibitors...
February 10, 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"