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https://www.readbyqxmd.com/read/29331794/melatonin-suppresses-eosinophils-and-th17-cells-in-hamsters-treated-with-a-combination-of-human-liver-fluke-infection-and-a-chemical-carcinogen
#1
Wachanan Wongsena, Lakhanawan Charoensuk, Rungtiwa Dangtakot, Porntip Pinlaor, Kitti Intuyod, Somchai Pinlaor
BACKGROUND: The combination of Opisthorchis viverrini (OV) infection and chemical carcinogen induces cholangiocarcinoma (CCA) in hamsters via inflammation-mediated mechanisms. Thus, suppression of inflammatory cells at the initial stages of CCA development would be of benefit. We aimed to investigate whether IL-17-producing CD4+ T cells (Th17) and CD4+ Foxp3+ T cells (Treg) are involved in the early stages of CCA genesis and can be targeted for suppression by melatonin. METHODS: Inflammation, an initial stage of CCA development, was induced in hamsters by a combination of O...
July 26, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29331497/dietary-antioxidant-micronutrients-alter-mucosal-inflammatory-risk-in-a-murine-model-of-genetic-and-microbial-susceptibility
#2
Joseph F Pierre, Reinhard Hinterleitner, Romain Bouziat, Nathan A Hubert, Vanessa Leone, Jun Miyoshi, Bana Jabri, Eugene B Chang
Inflammatory bowel diseases (IBD) are caused by the convergence of microbial, environmental, and genetic factors. Diet significantly alters these interactions by affecting both the host and microbiome. Using a mucosal inflammatory model that resembles the human condition of ileal pouchitis, we investigated the effects of Control (CONT) or Antioxidant (AOX) diet, containing pharmacologically relevant levels of 4 micronutrients, on disease risk in wild-type and IL-10-/- animals following surgical self-filling (SF) ileal blind loop placement...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29330750/immunologic-and-gene-expression-profiles-of-spontaneous-canine-oligodendrogliomas
#3
Anna Filley, Mario Henriquez, Tanmoy Bhowmik, Brij Nath Tewari, Xi Rao, Jun Wan, Margaret A Miller, Yunlong Liu, R Timothy Bentley, Mahua Dey
Malignant glioma (MG), the most common primary brain tumor in adults, is extremely aggressive and uniformly fatal. Several treatment strategies have shown significant preclinical promise in murine models of glioma; however, none have produced meaningful clinical responses in human patients. We hypothesize that introduction of an additional preclinical animal model better approximating the complexity of human MG, particularly in interactions with host immune responses, will bridge the existing gap between these two stages of testing...
January 12, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29326066/novel-everolimus-loaded-nanocarriers-for-topical-treatment-of-murine-experimental-autoimmune-uveoretinitis-eau
#4
Maren Kasper, Doris Gabriel, Michael Möller, Dirk Bauer, Lena Wildschütz, Herve Courthion, Michael R R Böhm, Martin Busch, Karin Loser, Solon Thanos, Robert Gurny, Arnd Heiligenhaus
In the present study, therapeutic effect of topically applied everolimus (EV)-loaded methoxy-poly(ethylene-glycol)-hexyl substituted poly (lactic acid) (mPEGhexPLA) nanocarriers on experimental autoimmune uveitis (EAU) were investigated. EAU was induced in B10.RIII mice via immunization with human interphotoreceptor retinoid-binding protein peptide 161-180 (hIRBPp161-180) in complete Freund's adjuvant. Everolimus-loaded mPEGhexPLA (EV/mPEGhexPLA) nanocarriers were prepared by using a solvent evaporation method...
January 8, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29322606/association-of-tumour-infiltrating-regulatory-t-cells-with-adverse-outcomes-in-dogs-with-malignant-tumours
#5
K Sakai, S Maeda, Y Yamada, J K Chambers, K Uchida, H Nakayama, T Yonezawa, N Matsuki
Regulatory T cells (Tregs) infiltrate into a variety of tumour tissues and associate with poor prognosis in humans. However, data on association of Treg infiltration with prognosis is limited in canine tumours. The purpose of this study was to examine the number of tumour-infiltrating Tregs and its association with overall survival (OS) in dogs with malignant tumours. The following 168 canine tumours were included: 37 oral malignant melanomas (OMMs); 14 oral squamous cell carcinomas (OSCCs); 16 pulmonary adenocarcinomas (PAs); 37 mammary carcinomas (MCs); 36 mast cell tumours (MCTs) and 28 hepatocellular carcinomas (HCCs)...
January 11, 2018: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29319882/oral-myeloid-cells-uptake-allergoids-coupled-to-mannan-driving-th1-treg-responses-upon-sublingual-delivery-in-mice
#6
Irene Soria, Juan López-Relaño, Marcos Viñuela, José-Ignacio Tudela, Alba Angelina, Cristina Benito-Villalvilla, Carmen M Díez-Rivero, Bárbara Cases, Ana I Manzano, Enrique Fernández-Caldas, Miguel Casanovas, Oscar Palomares, José L Subiza
BACKGROUND: Polymerized allergoids coupled to nonoxidized mannan (PM-allergoids) may represent novel vaccines targeting dendritic cells (DCs). PM-allergoids are better captured by DCs than native allergens and favor Th1/Treg cell responses upon subcutaneous injection. Herein we have studied in mice the in vivo immunogenicity of PM-allergoids administered sublingually in comparison to native allergens. METHODS: Three immunization protocols (4-8 weeks long) were used in Balb/c mice...
January 10, 2018: Allergy
https://www.readbyqxmd.com/read/29319881/systemic-il-2-anti-il-2ab-complex-combined-with-sublingual-immunotherapy-suppresses-experimental-food-allergy-in-mice-through-induction-of-mucosal-regulatory-t-cells
#7
Paola L Smaldini, Fernando Trejo, José L Cohen, Eliane Piaggio, Guillermo H Docena
Therapeutic tolerance restoration has been proven to modify food allergy in patients and animal models and although sublingual immunotherapy (SLIT) has showed promise, combined therapy may be necessary to achieve a strong and long-term tolerance. In this work, we combined SLIT with systemic administration of IL-2 associated with an anti-IL-2 monoclonal antibody (IL-2/anti-IL-2Ab complex or IL-2C) to reverse the IgE-mediated experimental allergy. Balb/c mice were sensitized with cholera toxin and milk proteins and orally challenged with allergen to elicit hypersensitivity reactions...
January 10, 2018: Allergy
https://www.readbyqxmd.com/read/29317916/exposure-to-no2-co-and-pm2-5-is-linked-to-regional-dna-methylation-differences-in-asthma
#8
Mary Prunicki, Laurel Stell, Deendayal Dinakarpandian, Mariangels de Planell-Saguer, Richard W Lucas, S Katharine Hammond, John R Balmes, Xiaoying Zhou, Tara Paglino, Chiara Sabatti, Rachel L Miller, Kari C Nadeau
Background: DNA methylation of CpG sites on genetic loci has been linked to increased risk of asthma in children exposed to elevated ambient air pollutants (AAPs). Further identification of specific CpG sites and the pollutants that are associated with methylation of these CpG sites in immune cells could impact our understanding of asthma pathophysiology. In this study, we sought to identify some CpG sites in specific genes that could be associated with asthma regulation (Foxp3 and IL10) and to identify the different AAPs for which exposure prior to the blood draw is linked to methylation levels at these sites...
2018: Clinical Epigenetics
https://www.readbyqxmd.com/read/29316291/immunomodulation-characteristics-by-thermal-ablation-therapy-in-cancer-patients
#9
Wuwei Yang, Wei Wang, Bing Liu, Baorang Zhu, Jing Li, Debao Xu, Yanli Ni, Li Bai, Guangxian Liu
AIM: Thermal ablation therapy has recently emerged as a promising noninvasive treatment modality for localized solid malignancies. Except its direct tumor-cell-killing effect on local tumor tissues, the immunomodulatory effect has also long been noticed which too has substantial effect on clinical outcome, but it is complicated. Though much has been investigated and rich evidences have been achieved, the fundamental state and profile of immunomodulation by thermal ablation in cancer patients, its exact mechanism, especially the systematic mechanism, and its effect on antitumor immunity remain unclear...
January 8, 2018: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29316256/immunosuppressive-effect-of-the-gut-microbiome-altered-by-high-dose-tacrolimus-in-mice
#10
Z Zhang, L Liu, H Tang, W Jiao, S Zeng, Y Xu, Q Zhang, Z Sun, A Mukherjee, X Zhang, X Hu
The alterations induced in gut microbiota by tacrolimus may affect immune function and organ transplantation. Mice were treated with a high-dose of tacrolimus for 14 days. The fecal microbiota were analyzed by pyrosequencing the 16S rRNA genes, and the effect on metabolism was predicted using the sequence data. The subgroups of T cells in the serum, gut-associated lymphoid tissue and draining lymph nodes were determined by flow cytometry. Tacrolimus treatment significantly altered the relative abundance of Allobaculum, Bacteroides and Lactobacillus and CD4+ CD25hi FoxP3+ regulatory T-cells in the colonic mucosa and the circulation...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29316248/a-standardized-flow-cytometry-procedure-for-the-monitoring-of-regulatory-t-cells-in-clinical-trials
#11
Pitoiset Fabien, Barbié Michèle, Monneret Guillaume, Braudeau Cécile, Pochard Pierre, Pellegrin Isabelle, Trauet Jacques, Labalette Myriam, Klatzmann David, Rosenzwajg Michelle
BACKGROUND: Quantification of regulatory T cells is crucial in immunomonitoring in clinical trials as this cell population has been shown to be involved in a wide range of diseases, including cancers, autoimmune diseases, infections and allergies. Human regulatory T cells are defined as CD4+ CD25+ CD127low FoxP3+ cells, and the standardization of their staining by flow cytometry is a challenge, especially in multicenter clinical trials, notably because of the intracellular location of FoxP3...
January 6, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29312633/the-synergistic-antitumor-effect-of-arsenic-trioxide-combined-with-cytotoxic-t-cells-in-pulmonary-metastasis-model-of-colon-cancer
#12
Lei Wang, Wentao Liang, Na Peng, Xiang Hu, Yingxin Xu, Zhong Liu
Adoptive T cell therapy, including cytotoxic T lymphocytes (CTLs), represents a promising non-toxic anticancer strategy. The effects of this therapy can be impaired by tumor-infiltrated regulatory T cells (Tregs). Autologous murine CTLs acquired using cryopreservation exhibited a cytotoxic effect equivalent to that of conventional CTLs. The killing activity of CTLs was enhanced significantly using arsenic trioxide (ATO), accompanied by reduction in Tregs in vitro. Results using a pulmonary metastasis model of colon cancer indicated that compared with the control group, ATO group, and CTLs group, metastatic node number decreased significantly (p<0...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29311230/s-aureus-colonization-induces-strain-specific-suppression-of-il-17
#13
Aylana Reiss-Mandel, Carmit Rubin, Morad Zayoud, Galia Rahav, Gili Regev-Yochay
Staphylococcus aureus is a pathogen that causes significant morbidity and mortality. Nasal carriage is a major source of transmission and of endogenous infection. Persistent carriage is detected in ∼30% of healthy individuals. While Th17 cells have been shown to play a role in S. aureus infection and clearance, the immune response to carriage is not well understood. Here, we evaluate Th17 responses and its potential inhibitors during S. aureus carriage. We recruited 25 volunteers, of whom 11 were persistent carriers...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29311129/regulatory-t-cells-from-discovery-to-autoimmunity
#14
Alexandra Kitz, Emily Singer, David Hafler
Multiple sclerosis (MS) is a genetically mediated autoimmune disease of the central nervous system. Allelic variants lead to lower thresholds of T-cell activation resulting in activation of autoreactive T cells. Environmental factors, including, among others, diet, vitamin D, and smoking, in combination with genetic predispositions, play a substantial role in disease development and activation of autoreactive T cells. FoxP3+ regulatory T cells (Tregs) have emerged as central in the control of autoreactive T cells...
January 8, 2018: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/29308306/analysis-of-the-immune-infiltrate-in-undifferentiated-pleomorphic-sarcoma-of-the-extremity-and-trunk-in-response-to-radiotherapy-rationale-for-combination-neoadjuvant-immune-checkpoint-inhibition-and-radiotherapy
#15
Emily Z Keung, Jen-Wei Tsai, Ali M Ali, Janice N Cormier, Andrew J Bishop, B Ashleigh Guadagnolo, Keila E Torres, Neeta Somaiah, Kelly K Hunt, Jennifer A Wargo, Alexander J Lazar, Wei-Lien Wang, Christina L Roland
Background: Undifferentiated pleomorphic sarcoma of the extremity and trunk (ET-UPS) presents a unique therapeutic challenge. Although immunotherapy has recently been employed in advanced soft tissue sarcoma, there is limited data characterizing the immune infiltrate in ET-UPS. Radiotherapy (RT) has been shown in other tumor types to promote tumor antigen release and enhance tumor-specific targeting by the adaptive immune system. The aim of this study was to 1) characterize the baseline immune infiltrate and 2) evaluate the effect of preoperative RT on the histologic appearance of and the immune infiltrate in ET-UPS...
2018: Oncoimmunology
https://www.readbyqxmd.com/read/29307625/prognostic-role-of-tumoral-pdl1-expression-and-peritumoral-foxp3-lymphocytes-in-vulvar-melanomas
#16
Agata Chłopik, M Angelica Selim, Yan Peng, Cheng-Lin Wu, Gemma Tell-Marti, Kristen M Paral, Sara C Shalin, Stefan Kraft, Chao-Kai Hsu, Christopher R Shea, Susana Puig, Maria-Teresa Fernandez-Figueras, Wojciech Biernat, Janusz Ryś, Andrzej Marszalek, Mai P Hoang
Prognostic role of PDL1 expression, CD8+ and FoxP3+ lymphocytes in vulvar melanomas has not been studied. We correlated PDL1 expression, and CD8+ and FoxP3+ immune infiltrates with clinicopathologic variables and patient outcomes in a series of 75 vulvar melanomas. Tumoral PDL1 expression (>5%) was seen in 23% of cases. By Fisher's Exact test, PDL1 expression and peritumoral FoxP3+ lymphocytes significantly correlated with less disease-specific death. By linear regression analysis, correlations between tumoral PDL1 expression with the density of tumoral CD8+ and peritumoral CD8+ lymphocytes; tumoral FoxP3+ with tumoral CD8+ lymphocytes; and peritumoral FoxP3+ with peritumoral CD8+ lymphocytes were observed...
January 4, 2018: Human Pathology
https://www.readbyqxmd.com/read/29307297/sex-chromosome-contributions-to-sex-differences-in-multiple-sclerosis-susceptibility-and-progression
#17
Rhonda R Voskuhl, Amr H Sawalha, Yuichiro Itoh
BACKGROUND: Why are women more susceptible to multiple sclerosis, but men have worse disability progression? Sex differences in disease may be due to sex hormones, sex chromosomes, or both. OBJECTIVE: Determine whether differences in sex chromosomes can contribute to sex differences in multiple sclerosis using experimental autoimmune encephalomyelitis. METHODS: Sex chromosome transgenic mice, which permit the study of sex chromosomes not confounded by differences in sex hormones, were used to examine an effect of sex chromosomes on autoimmunity and neurodegeneration, focusing on X chromosome genes...
January 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29302887/analysis-of-immunobiologic-markers-in-primary-and-recurrent-glioblastoma
#18
Maryam Rahman, Jesse Kresak, Changlin Yang, Jianping Huang, Wesley Hiser, Paul Kubilis, Duane Mitchell
Glioblastoma (GBM) generates a varied immune response and understanding the immune microenvironment may lead to novel immunotherapy treatments modalities. The goal of this study was to evaluate the expression of immunologic markers of potential clinical significance in primary versus recurrent GBM and assess the relationship between these markers and molecular characteristics of GBM. Human GBM samples were evaluated and analyzed with immunohistochemistry for multiple immunobiologic markers (CD3, CD8, FoxP3, CD68, CD163, PD1, PDL1, CTLA4, CD70)...
January 4, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29302868/the-adverse-effects-of-se-toxicity-on-inflammatory-and-immune-responses-in-chicken-spleens
#19
Yachao Wang, Li Jiang, Jian He, Mao Hu, Fankun Zeng, Yuanfeng Li, He Tian, Xuegang Luo
Selenium (Se) is an essential trace element, but excessive intake of Se could induce Se poisoning, and result in various health problems. NF-κB regulated many molecules of the immune response and the inflammatory response, and Th1/Th2 balance played a key in the regulation of immune response. The aim of this study is to investigate the role of NF-κB pathway and Th1/Th2 imbalance in the adverse influence of Se poisoning on chicken spleens. In the current study, 90 chickens were randomly divided into two groups (n = 45 per group)...
January 4, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29302378/potential-utility-of-fdg-pet-ct-as-a-non-invasive-tool-for-monitoring-local-immune-responses
#20
Seungho Lee, Seohee Choi, Sang Yong Kim, Mi Jin Yun, Hyoung-Il Kim
Purpose: The tumor microenvironment is known to be associated with the metabolic activity of cancer cells and local immune reactions. We hypothesized that glucose metabolism measured by 2-deoxy-2-(18F)fluoro-D-glucose (18F-FDG) positron emission tomography (PET)-computed tomography (CT) (18F-FDG PET-CT) would be associated with local immune responses evaluated according to the presence of tumor infiltrating lymphocytes (TILs). Materials and Methods: We retrospectively reviewed 56 patients who underwent 18F-FDG PET-CT prior to gastrectomy...
December 2017: Journal of Gastric Cancer
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