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Immune exosome

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https://www.readbyqxmd.com/read/28202367/exosomes-therapy-delivery-tools-and-biomarkers-of-diseases
#1
REVIEW
Lucio Barile, Giuseppe Vassalli
Virtually all cells in the organism secrete extracellular vesicles (EVs), a heterogeneous population of lipid bilayer membrane-enclosed vesicles that transport and deliver payloads of proteins and nucleic acids to recipient cells, thus playing central roles in cell-cell communications. Exosomes, nanosized EVs of endosomal origin, regulate many pathophysiological processes including immune responses and inflammation, tumour growth, and infection. Healthy subjects and patients with different diseases release exosomes with different RNA and protein contents into the circulation, which can be measured as biomarkers...
February 12, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28197368/immunosuppressive-cd14-hla-dr-lo-neg-monocytes-are-elevated-in-pancreatic-cancer-and-primed-by-tumor-derived-exosomes
#2
Naureen Javeed, Michael P Gustafson, Shamit K Dutta, Yi Lin, William R Bamlet, Ann L Oberg, Gloria M Petersen, Suresh T Chari, Allan B Dietz, Debabrata Mukhopadhyay
Immunological strategies to treat pancreatic cancer offer new therapeutic approaches to improve patient outcomes. Understanding alterations in the immune systems of pancreatic cancer patients will likely lead to advances in immunotherapy for the disease. We profiled peripheral blood leukocytes from pancreatic cancer patients (n = 22) and age-matched controls (n = 20) using flow cytometry. Immune profiling of pancreatic cancer patients identified phenotypic changes in various immune cell populations, including a population of immunosuppressive monocytes (CD14(+)HLA-DR(lo/neg)), which were shown to be increased in these patients...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28191696/a-new-approach-in-stem-cell-research-exosomes-their-mechanism-of-action-via-cellular-pathways
#3
REVIEW
Burak Derkus, Kaan C Emregul, Emel Emregul
Exosomes are nano-sized vesicles surrounded by a lipid membrane, which tend to be secreted towards extra-cellular environments. Despite being defined as vesicles involved in excretion of molecular wastes by Rose Johnstone in the 1970's, further studies revealed them to be effective in various biological processes such as cancer development, regulation of the immune system, intercellular communication, stem cell biology and tissue/organ regeneration. Although many studies dealing with the role of exosomes in stem cell differentiation and the use of exosomes isolated from stem cells, for treatment of several diseases have been published, the involved mechanisms remain largely unknown...
February 13, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28188035/breast-milk-derived-exosomes-promote-intestinal-epithelial-cell-growth
#4
Alison Hock, Hiromu Miyake, Bo Li, Carol Lee, Leonardo Ermini, Yuhki Koike, Yong Chen, Pekka Määttänen, Augusto Zani, Agostino Pierro
BACKGROUND: Breast milk administration prevents necrotizing enterocolitis (NEC). However, the mechanism remains unclear. Exosomes are cell-derived vesicles highly present in human milk and regulate intercellular signaling, inflammation, and immune response. We hypothesized that milk-derived exosomes beneficially affect intestinal epithelial cells. METHODS: Rat milk was collected, and exosomes were isolated using ExoQuick reagent and visualized by Nanoparticle Tracking Analysis...
January 29, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28177658/the-role-of-exosomal-vp40-in-ebola-virus-disease
#5
Michelle L Pleet, Catherine DeMarino, Benjamin Lepene, M Javad Aman, Fatah Kashanchi
Ebola virus (EBOV) can cause a devastating hemorrhagic disease, leading to death in a short period of time. After infection, the resulting EBOV disease results in high levels of circulating cytokines, endothelial dysfunction, coagulopathy, and bystander lymphocyte apoptosis in humans and nonhuman primates. The VP40 matrix protein of EBOV is essential for viral assembly and budding from the host cell. Recent data have shown that VP40 exists in the extracellular environment, including in exosomes, and exosomal VP40 can impact the viability of recipient immune cells, including myeloid and T cells, through the regulation of the RNAi and endosomal sorting complexes required for transport pathways...
February 8, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28169232/membrane-bound-versus-soluble-major-histocompatibility-complex-class-i-related-chain-a-and-major-histocompatibility-complex-class-i-related-chain-b-differential-expression-mechanisms-of-tumor-eradication-versus-evasion-and-current-drug-development-strategies
#6
REVIEW
P K Suresh
Major histocompatibility complex Class I-related chain A/chain B (MICA/MICB) is stress-inducible, highly polymorphic ligands whose expression at the transcript level has been detected in all tissues except the central nervous system. However, their restricted protein expression is due to their regulation at the posttranslational level. Its levels are elevated in virally infected and neoplastically transformed cells. Membrane expression of this NKG2DL marks the aberrant cells for elimination by those immune effector cells that express the cognate NKG2D receptor...
October 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28168600/the-role-of-pancreatic-cancer-derived-exosomes-in-cancer-progress-and-their-potential-application-as-biomarkers
#7
REVIEW
H Jin, Y Wu, X Tan
Pancreatic cancer is one of the most deadly cancers, with dismal prognosis due to its poor early detection rate and high metastatic rate. Thus, elucidation of the molecular mechanisms accounting for its metastasis and discovery of competent biomarkers is required. Exosomes are multivesicular body-derived small extracellular vesicles released by various cell types that serve as important message carriers during intercellular communication. They are also known to play critical roles during cancer-genesis, cancer-related immune reactions, and metastasis...
February 6, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28166442/exosomes-in-cancer-theranostic-diamonds-in-the-rough
#8
Marine Cordonnier, Gaëtan Chanteloup, Nicolas Isambert, Renaud Seigneuric, Pierre Fumoleau, Carmen Garrido, Jessica Gobbo
During the last 10 years, exosomes, which are small vesicles of 50-200 nm diameter of endosomal origin, have aroused a great interest in the scientific and clinical community for their roles in intercellular communication in almost all physiological and pathological processes. Most cells can potentially release these nanovesicles that share with the parent cell a similar lipid bilayer with transmembrane proteins and a panel of enclosed soluble proteins such as heat shock proteins and genetic material, thus acting as potential nanoshuttles of biomarkers...
February 6, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28160157/a-comparison-of-serum-mirnas-influencing-metastatic-growth-of-emt6-vs-4thm-tumor-cells-in-wild-type-and-cd200r1ko-mice
#9
Reginald M Gorczynski, Fang Zhu, Zhiqi Chen, Ohla Kos, Ismat Khatri
PURPOSE: We investigated whether miRNAs in exosomes from EMT6 or 4THM tumor-bearing mice played a role in regulating inflammatory cytokine expression and/or metastasis in WT mice injected with EMT6 and/or 4THM tumor cells. METHODS: EMT6 tumors in BALB/c CD200R1KO mice resolve following surgical resection of localized tumor and immunization with irradiated EMT6 cells along with CpG as adjuvant. Wild-type (WT) animals treated in the same fashion develop pulmonary and liver metastases within 20 days of surgery...
February 3, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28157838/purification-and-characterization-of-micrornas-within-middle-ear-fluid-exosomes-implication-in-otitis-media-pathophysiology
#10
Stéphanie Val, Stephanie Jeong, Marian Poley, Anna Krueger, Gustavo Nino, Kristy Brown, Diego Preciado
BACKGROUND: Otitis Media (OM) is characterized by acute infection progressing to chronic middle ear effusion (MEE). Extracellular secretion of microRNAs (miRNAs) in exosomes is a newly discovered mechanism for cells exerting distant cell genetic regulation. Whether MEE contains exosomes with specific miRNAs is unknown. This study aimed to purify and characterize the exosomal and miRNA content of MEE. METHOD: MEEs were subjected to Exoquick exosomal purification and EXOCET exosomal quantification...
February 3, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28137563/evaluating-exosome-protein-content-changes-induced-by-virus-activity-using-silac-labeling-and-lc-ms-ms
#11
X Zhao, Y Xie, J Liu
Exosomes are small membrane vesicles that are produced by cells and excreted into extracellular space. Contents of exosomes generally include lipid, membrane, and soluble proteins, and various types of coding and noncoding RNAs. Over the past decades, it has become clear that exosomes constitute an important vector for intercellular transport and communication with significant functional relevance. Evaluating exosome contents and their changes are vital for understanding its role in different physiological and pathological processes...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28132116/exosomes-derived-from-irradiated-esophageal-carcinoma-infiltrating-t-cells-promote-metastasis-by-inducing-the-epithelial-mesenchymal-transition-in-esophageal-cancer-cells
#12
Hua Min, Xiangdong Sun, Xi Yang, Hongcheng Zhu, Jia Liu, Yuandong Wang, Guangzong Chen, Xinchen Sun
Exosomes are nanovesicles derived from tumor and normal cells that are detectable in human biological fluids, such as plasma, and cell culture supernatants. The function of exosome secretion from "normal" cells is unclear. Although numerous studies have investigated exosomes derived from hematopoietic cells, little is known regarding exosomes fromT cells, even though these cells play significant roles in innate and acquired immunity. A CCK-8 assay was used to examine the ability of exosomes to inhibit TE13 cell proliferation...
January 28, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28130830/rna-in-extracellular-vesicles
#13
REVIEW
Kyoung Mi Kim, Kotb Abdelmohsen, Maja Mustapic, Dimitrios Kapogiannis, Myriam Gorospe
Cells release a range of membrane-enclosed extracellular vesicles (EVs) into the environment. Among them, exosomes and microvesicles (collectively measuring 40-1000 nm in diameter) carry proteins, signaling lipids, and nucleic acids from donor cells to recipient cells, and thus have been proposed to serve as intercellular mediators of communication. EVs transport cellular materials in many physiologic processes, including differentiation, stem cell homeostasis, immune responses, and neuronal signaling. EVs are also increasingly recognized as having a direct role in pathologies such as cancer and neurodegeneration...
January 28, 2017: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/28129015/exosome-secretion-promotes-chemotaxis-of-cancer-cells
#14
Bong Hwan Sung, Alissa M Weaver
Migration of cells toward chemical cues, or chemotaxis, is important for many biologic processes such as immune defense, wound healing and cancer metastasis. Although chemotaxis is thought to occur in cancer cells, it is less well characterized than chemotaxis of professional immune cells such as neutrophils. Here, we show that cancer cell chemotaxis relies on secretion of exosome-type extracellular vesicles. Migration of fibrosarcoma cells toward a gradient of exosome-depleted serum was diminished by knockdown of the exosome secretion regulator Rab27a...
January 27, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28110750/role-of-exosomes-in-placental-homeostasis-and-pregnancy-disorders
#15
C Salomon, G E Rice
The human placenta is a unique organ that performs the function of the majority of fetal organs across gestation. How the placenta communicates with maternal tissues to prepare them for pregnancy is not fully understood. Recently, it has been established that placental cells can communicate with maternal tissues to regulate their biological function via extracellular vesicles (EVs). EVs are subclassified into exosomes or microvesicles (MVs) according to their size, cell or tissue of origin, functions, and physical features...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28107450/systemic-t-cells-immunosuppression-of-glioma-stem-cell-derived-exosomes-is-mediated-by-monocytic-myeloid-derived-suppressor-cells
#16
Rossana Domenis, Daniela Cesselli, Barbara Toffoletto, Evgenia Bourkoula, Federica Caponnetto, Ivana Manini, Antonio Paolo Beltrami, Tamara Ius, Miran Skrap, Carla Di Loreto, Giorgia Gri
A major contributing factor to glioma development and progression is its ability to evade the immune system. Nano-meter sized vesicles, exosomes, secreted by glioma-stem cells (GSC) can act as mediators of intercellular communication to promote tumor immune escape. Here, we investigated the immunomodulatory properties of GCS-derived exosomes on different peripheral immune cell populations. Healthy donor peripheral blood mononuclear cells (PBMCs) stimulated with anti-CD3, anti-CD28 and IL-2, were treated with GSC-derived exosomes...
2017: PloS One
https://www.readbyqxmd.com/read/28104913/exosome-derived-micrornas-in-cancer-metabolism-possible-implications-in-cancer-diagnostics-and-therapy
#17
REVIEW
Marco Tomasetti, Wan Lee, Lory Santarelli, Jiri Neuzil
Malignant progression is greatly affected by dynamic cross-talk between stromal and cancer cells. Exosomes are secreted nanovesicles that have key roles in cell-cell communication by transferring nucleic acids and proteins to target cells and tissues. Recently, MicroRNAs (miRs) and their delivery in exosomes have been implicated in physiological and pathological processes. Tumor-delivered miRs, interacting with stromal cells in the tumor microenvironment, modulate tumor progression, angiogenesis, metastasis and immune escape...
January 20, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28103990/-effects-of-human-amniotic-epithelial-stem-cells-derived-exosomes-on-healing-of-wound-with-full-thickness-skin-defect-in-rats
#18
B Zhao, G F Wu, Y J Zhang, W Zhang, F F Yang, D Xiao, K X Zeng, J H Shi, L L Su, D H Hu
Objective: To investigate the effects of human amniotic epithelial stem cells-derived exosomes on healing of wound with full-thickness skin defect in rats. Methods: (1) Human amniotic epithelial stem cells were isolated from the amnion tissue of 5 full-term pregnant women in Department of Obstetrics of our hospital by the method of trypsin digestion, and their morphology was observed. The third passage of cells were stained with rhodamine-phalloidin for cytoskeleton observation. The third passage of cells were identified with flow cytometry through the detection of expressions of cell surface markers CD29, CD31, CD34, CD90, CD105, SSEA3, SSEA4 and immunity-related marker human leukocyte antigen-D related site (HLA-DR)...
January 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28101591/functions-of-cancer-derived-extracellular-vesicles-in-immunosuppression
#19
REVIEW
Liliana Czernek, Markus Düchler
Extracellular vesicles, including exosomes, constitute an important element of intercellular communication by carrying a variety of molecules from producer to target cells. The transport of mRNA and miRNA can directly modulate gene expression in the target cells. The miRNA content in exosomes is characteristic for the cell from which the vesicles were derived enabling the usage of exosomes as biomarkers for the diagnosis various diseases, including cancer. Cancer-derived exosomes support the survival and progression of tumors in many ways and also contribute to the neutralization of the anti-cancer immune response...
January 18, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28096300/enhanced-suppression-of-polyclonal-cd8-25-regulatory-t-cells-via-exosomal-arming-of-antigen-specific-peptide-mhc-complexes
#20
Chuanyong Mu, Xueshu Zhang, Lu Wang, Aizhang Xu, Khawaja Ashfaque Ahmed, Xueqin Pang, Rajni Chibbar, Andrew Freywald, Jianan Huang, Yehan Zhu, Jim Xiang
Compared with CD4(+)25(+) regulatory T cells (Tregs), the mechanisms for natural, polyclonal CD8(+)25(+) Treg immune suppression have been significantly less studied. We previously showed that polyclonal T cells can acquire antigen-specific targeting activity through arming with exosomal peptide-MHC (pMHC). In this study, we assessed the suppressive effect of CD8(+)25(+) Tregs or CD8(+)25(+) Tregs armed with ovalbumin (OVA)-specific exosomes on other immune cells and OVA-specific dendritic cell (DCOVA)-stimulated antitumor immunity...
January 17, 2017: Journal of Leukocyte Biology
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