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https://www.readbyqxmd.com/read/29344283/antigen-presentation-of-the-oct4-and-sox2-peptides-by-cd154-activated-b-lymphocytes-enhances-the-killing-effect-of-cytotoxic-t-lymphocytes-on-tumor-stem-like-cells-derived-from-cisplatin-resistant-lung-cancer-cells
#1
Xueyan Zhang, Yanwei Zhang, Jianlin Xu, Huimin Wang, Xiaoxuan Zheng, Yuqing Lou, Baohui Han
The present study investigated whether antigen presentation of the Oct4 and Sox2 peptides by CD154-activated B lymphocytes can enhance the killing effect of CD8+ cytotoxic T lymphocytes (CTLs) on lung stem-like cancer cells (SLCCs). The CTLs were generated using an accelerated co-cultured dendritic cells (DC) (acDC) assay by incubating human peripheral blood mononuclear cells (PBMCs) from non-small-cell lung cancer patients with antigen peptides of Oct4 and Sox2 in the presence of several DC-activating agents...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29334915/monitoring-the-responsiveness-of-t-and-antigen-presenting-cell-compartments-in-breast-cancer-patients-is-useful-to-predict-clinical-tumor-response-to-neoadjuvant-chemotherapy
#2
David A Bernal-Estévez, Oscar García, Ramiro Sánchez, Carlos A Parra-López
BACKGROUND: Vaccination of mice with tumors treated with Doxorubicin promotes a T cell immunity that relies on dendritic cell (DC) activation and is responsible for tumor control in vaccinated animals. Despite Doxorubicin in combination with Cyclophosphamide (A/C) is widely used to treat breast cancer patients, the stimulating effect of A/C on T and APC compartments and its correlation with patient's clinical response remains to be proved. METHODS: In this prospective study, we designed an in vitro system to monitor various immunological readouts in PBMCs obtained from a total of 17 breast cancer patients before, and after neoadjuvant anti-tumor therapy with A/C...
January 15, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29319621/selective-cd28-inhibition-modulates-alloimmunity-and-cardiac-allograft-vasculopathy-in-anti-cd154-treated-monkeys
#3
Tianshu Zhang, Agnes M Azimzadeh, Wenji Sun, Natalie A O'Neill, Evelyn Sievert, Emily Bergbower, Gheorghe Braileanu, Lars Burdorf, Xiangfei Cheng, Thomas Monahan, Siamak Dahi, Donald Harris, Elana Rybak, Emily Welty, Anthony Kronfli, Chris Avon, Richard N Pierson
BACKGROUND: Selective CD28 inhibition is actively pursued as an alternative to B7 blockade using CTLA4-Ig based on the hypothesis that the checkpoint immune regulators CTLA-4 and PD-L1 will induce tolerogenic immune signals. We previously showed that blocking CD28 using a monovalent nonactivating reagent (single chain anti-CD28 Fv fragment linked to alpha-1 anti-trypsin: sc28AT) synergizes with calcineurin inhibitors in nonhuman primate (NHP) kidney and heart transplantation. Here, we explored the efficacy of combining a 3-week 'induction" sc28AT treatment with prolonged CD154 blockade...
January 10, 2018: Transplantation
https://www.readbyqxmd.com/read/29311002/humoral-and-cellular-immune-response-in-mice-induced-by-the-classical-swine-fever-virus-e2-protein-fused-to-the-porcine-cd154-antigen
#4
Yusmel Sordo, Marisela Suárez, Rosalina Caraballo, Talía Sardina, Emma Brown, Carlos Duarte, Joanna Lugo, Lázaro Gil, Danny Perez, Ayme Oliva, Milagros Vargas, Elaine Santana, Rodolfo Valdés, María Pilar Rodríguez
The development of subunit vaccines against classical swine fever is a desirable goal, because it allows discrimination between vaccinated and infected animals. In this study, humoral and cellular immune response elicited in inbred BALB/c mice by immunization with a recombinant classical swine fever virus (CSFV) E2 protein fused to porcine CD154 antigen (E2CD154) was assessed. This model was used as a predictor of immune response in swine. Mice were immunized with E2CD154 emulsified in Montanide ISA50V2 or dissolved in saline on days 1 and 21...
January 5, 2018: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/29300231/long-term-nonhuman-primate-renal-allograft-survival-without-ongoing-immunosuppression-in-recipients-of-delayed-donor-bone-marrow-transplantation
#5
Kiyohiko Hotta, Tetsu Oura, Abbas Dehnadi, Svjetlan Boskovic, Masatoshi Matsunami, Ivy Rosales, Rex N Smith, Robert B Colvin, A Benedict Cosimi, Tatsuo Kawai
BACKGROUND: We have previously reported successful induction of renal allograft tolerance in nonhuman primates (NHP) following an initial posttransplant period of conventional immunosuppression (delayed tolerance) using a nonmyeloablative conditioning regimen consisting of anti-CD154 and anti-CD8 mAbs plus equine ATG (Atgam) and donor bone marrow transplantation (DBMT). Since these reagents are not currently clinically available, the protocol was revised to be applicable to human recipients of deceased donor allografts...
January 4, 2018: Transplantation
https://www.readbyqxmd.com/read/29289462/elevated-expression-of-activated-th2-cells-and-milk-specific-th2-cells-in-milk-induced-eosinophilic-esophagitis
#6
Antonella Cianferoni, Melanie A Ruffner, Ryan Guzek, Shabo Guan, Terri Brown-Whitehorn, Amanda Muir, Jonathan M Spergel
BACKGROUND: Eosinophilic esophagitis (EoE) is an allergic inflammatory disease that is triggered by food allergens and characterized by progressive esophageal dysfunction. Esophageal biopsy specimens are characterized by eosinophilia and expression of TH2 cytokines. OBJECTIVE: To ascertain whether TH2 cells can exist in the peripheral blood in patients with milk-induced EoE. METHODS: Peripheral blood mononuclear cells from 20 children with milk-induced EoE were collected during active EoE (EoE-A) while consuming milk and inactive EoE (EoE-I) while not consuming milk, and 8 healthy patients without EoE were used as controls...
December 28, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29288900/increased-pd-1-cd154-tfh-cells-are-possibly-the-most-important-functional-subset-of-pd-1-t-follicular-helper-cells-in-adult-patients-with-minimal-change-disease
#7
Tao Li, Yunpeng Shi, Weixia Sun, Haifeng Wang, Quan Wang, Yanfang Jiang
T follicular helper (Tfh) cells, especially programmed cell death protein 1 (PD-1)+ Tfh cells, exert important functions in the normal immune response. The purpose of this study was to determine the frequency of different subsets of PD-1+ Tfh cells and their functional effects in adult patients with minimal change disease (MCD). The frequencies of circulating PD-1+, PD-1+CD154+, and PD-1+interleukin (IL)-21+ Tfh cells, and CD38+CD19+ and CD38+CD19+CD40+ B cells, as well as serum IL-2, IL-4, IL-17A, IL-6, IL-21, and interferon (IFN)-γ were significantly increased in the MCD patients compared with the healthy controls (HCs) (P < 0...
December 27, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29250828/cd4-cd25hi-foxp3-regulatory-t-cells-in-long-term-cardiac-xenotransplantation
#8
Avneesh K Singh, Joshua L Chan, Caleb N Seavey, Philip C Corcoran, Robert F Hoyt, Billeta G T Lewis, Marvin L Thomas, David L Ayares, Keith A Horvath, Muhammad M Mohiuddin
BACKGROUND: CD4+CD25Hi FoxP3+ T (Treg) cells are a small subset of CD4+ T cells that have been shown to exhibit immunoregulatory function. Although the absolute number of Treg cells in peripheral blood lymphocytes (PBL) is very small, they play an important role in suppressing immune reactivity. Several studies have demonstrated that the number of Treg cells, rather than their intrinsic suppressive capacity, may contribute to determining the long-term fate of transplanted grafts. In this study, we analyzed Treg cells in PBL of long-term baboon recipients who have received genetically modified cardiac xenografts from pig donors...
December 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/29248968/contradictory-intrahepatic-immune-responses-activated-in-high-load-hepatitis-c-virus-livers-compared-with-low-load-livers
#9
Mariko Ishibashi, Hiromi Yamaguchi, Yukari Hirotani, Akihisa Sakurada, Toshihide Endo, Masahiko Sugitani, Tadatoshi Takayama, Makoto Makishima, Mariko Esumi
We found a HLA class II histocompatibility antigen gene, DQ alpha 1 chain (HLA-DQA1), that was expressed more than 9-fold higher in high-load hepatitis C virus (HCV) livers than low-load HCV livers using transcriptomics of chronic HCV-infected livers. To further investigate this finding, we examined which cells were positive for HLA-DQA1 and what liver immune responses were different between HCV-high and -low livers. HLA-DQA1-positive cells were significantly increased in the HCV-high group, and most positive cells were identified as non-parenchymal sinusoid cells and lymphocytic infiltrates in the portal area...
December 16, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29237773/a-subset-of-human-autoreactive-cd1c-restricted-t-cells-preferentially-expresses-trbv4-1-tcrs
#10
Tingxi Guo, Ming Yin Koo, Yuki Kagoya, Mark Anczurowski, Chung-Hsi Wang, Kayoko Saso, Marcus O Butler, Naoto Hirano
In humans, a substantial portion of T cells recognize lipids presented by the monomorphic CD1 proteins. Recent studies have revealed the molecular basis of mycobacterial lipid recognition by CD1c-restricted T cells. Subsets of CD1c-restricted T cells recognize self-lipids in addition to foreign lipids, which may have implications in human diseases involving autoimmunity and malignancy. However, the molecular identity of these self-reactive T cells remains largely elusive. In this study, using a novel CD1c+ artificial APC (aAPC)-based system, we isolated human CD1c-restricted autoreactive T cells and characterized them at the molecular level...
December 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29223146/investigation-of-mast-cell-toll-like-receptor-3-in-chronic-fatigue-syndrome-myalgic-encephalomyelitis-and-systemic-mastocytosis-participants-using-the-novel-application-of-automacs-magnetic-separation-and-flow-cytometry
#11
Cassandra Balinas, Thao Nguyen, Samantha Johnston, Peter Smith, Donald Staines, Sonya Marshall-Gradisnik
BACKGROUND: Viral infections and hypersensitivities are commonly reported by Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) patients. Mast Cells (MC) uniquely mediate type 1 hypersensitivities and resolve viral infections via toll-like receptor 3 (TLR3). OBJECTIVE: To characterise and compare mast cell progenitors (MCPs) in CFS/ME participants with a known MC disorder, Systemic mastocytosis (SM), and secondly, to investigate the role of MC TLR3 in CFS/ME participants following Polyinosinic:polycytidylic acid (Poly I:C) stimulation...
December 10, 2017: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/29183724/cd40l-and-tnf-both-activate-the-classical-nf-%C3%AE%C2%BAb-pathway-which-is-not-required-for-the-cd40l-induced-alternative-pathway-in-endothelial-cells
#12
J Seigner, J Basilio, U Resch, R de Martin
CD40L and TNF signal through engagement of their respective receptors, which are both members of the TNF receptor family. They use partially common signaling molecules leading, among others, to activation of the NF-κB pathway. However, whereas TNF activates the classical, CD40L has been reported to activate the alternative NF-κB pathway, leading to the anticipation that differences in the pattern of inflammatory gene expression would occur. Here, we have compared the gene expression repertoire of CD40L (CD154) and TNF stimulated HUVEC and report that unexpectedly, apart from a stronger response to TNF, no major qualitative differences could be observed...
November 25, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29172992/cellular-immunogenicity-of-human-papillomavirus-vaccines-cervarix-and-gardasil-in-adults-with-hiv-infection
#13
Maria Zurek Munk-Madsen, Lars Toft, Tina Kube, Rolf Richter, Lars Ostergaard, Ole S Søgaard, Martin Tolstrup, Andreas M Kaufmann
Human papillomavirus (HPV) infection is a frequent cause of malignant and non-malignant disease, in particular among persons with HIV. HPV serotype-specific anti L1 antibodies protect against HPV infection but little is known about prophylactic HPV vaccine-induced cell-mediated immunity against HPV in high-risk individuals. We recently showed that both HPV vaccines (Gardasil® and Cervarix®) induce solid, serological immune responses in HIV-infected persons. This study aimed to characterize HPV-specific CD4 T cells in HIV-infected HPV-vaccine recipients, T cell responses being critical for B cell activation and antibody-isotype switching...
November 27, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29131413/the-effect-of-epitope-based-ligation-of-icam-1-on-survival-and-retransplantation-of-pig-islets-in-nonhuman-primates
#14
Jae-Il Lee, Jiyeon Kim, Yun-Jung Choi, Hi-Jung Park, Hye-Jin Park, Hae Joo Wi, Sunok Yoon, Jun-Seop Shin, Jin Kyun Park, Kyeong Cheon Jung, Eun Bong Lee, Hee Jung Kang, Eung Soo Hwang, Sang-Joon Kim, Chung-Gyu Park, Seong Hoe Park
BACKGROUND: Pig islet xenotransplantation is a promising alternative to allogeneic transplantation. However, the wide immunologic barrier between pigs and primates limits the long-term survival of the graft. MD-3, a novel monoclonal antibody (mAb) that recognizes a particular epitope of human ICAM-1, can render T cells tolerant to a xenograft by arresting dendritic cell maturation. We report the long-term survival of adult wild-type pig islets and successful retransplantation in nonhuman primates using a protocol comprising induction with MD-3 mAb and maintenance with anti-CD154 mAb and sirolimus...
November 12, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/29126749/corrigendum-to-efficacy-of-e2-glycoprotein-fused-to-porcine-cd154-as-a-novel-chimeric-subunit-vaccine-to-prevent-classical-swine-fever-virus-vertical-transmission-in-pregnant-sows
#15
Sara Muñoz-González, Yusmel Sordo, Marta Pérez-Simó, Marisela Suarez, Albert Canturri, Maria Pilar Rodriguez, María Teresa Frías-Lepoureau, Mariano Domingo, Mario Pablo Estrada, Llilianne Ganges
Here we evaluated the effect of double vaccination with a novel subunit marker vaccine candidate based in the CSFV E2 glycoprotein fused to the porcine CD154 to prevent CSFV vertical transmission. A lentivirus-based gene delivery system was used to obtain a stable recombinant HEK 293 cell line for the expression of E2 fused to porcine CD154 molecule. Six pregnant sows were distributed in two groups and at 64days of gestation animals numbered 1-4 (group 1) were vaccinated via intramuscular inoculation with 50μg of E2-CD154 subunit vaccine...
November 7, 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/29071680/multiparameter-intracellular-cytokine-staining
#16
Patricia Lovelace, Holden T Maecker
Intracellular cytokine staining is a popular method for visualizing cellular responses, most often T-cell responses to antigenic or mitogenic stimulation. It can be coupled with staining for other functional markers, such as upregulation of CD107 or CD154, as well as phenotypic markers that define specific cellular subsets, e.g., effector and memory T-cell compartments, NK cells, or monocytes. Recent advances in multicolor flow cytometry instrumentation and software have allowed the routine combination of 12 or more markers, creating some technical and analytical challenges along the way, and exposing a need for standardization in the field...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29071674/mass-cytometry-assays-for-antigen-specific-t-cells-using-cytof
#17
Dongxia Lin, Holden T Maecker
T Cells specific for a single antigen tend to be rare, even after expansion of memory cells. They are commonly detected by in vitro stimulation with peptides or protein, followed by staining for intracellular cytokines. In this protocol, we use CyTOF(®) mass cytometry to collect single-cell data on a large number of cytokines/chemokines, as well as cell-surface proteins that characterize T cells and other immune cells. We also include a method for magnetic bead enrichment of antigen-stimulated T cells, based on their expression of CD154 and CD69...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29065175/comparative-analysis-of-activation-induced-marker-aim-assays-for-sensitive-identification-of-antigen-specific-cd4-t-cells
#18
COMPARATIVE STUDY
Samantha Reiss, Amy E Baxter, Kimberly M Cirelli, Jennifer M Dan, Antigoni Morou, Audrey Daigneault, Nathalie Brassard, Guido Silvestri, Jean-Pierre Routy, Colin Havenar-Daughton, Shane Crotty, Daniel E Kaufmann
The identification and study of antigen-specific CD4 T cells, both in peripheral blood and in tissues, is key for a broad range of immunological research, including vaccine responses and infectious diseases. Detection of these cells is hampered by both their rarity and their heterogeneity, in particular with regards to cytokine secretion profiles. These factors prevent the identification of the total pool of antigen-specific CD4 T cells by classical methods. We have developed assays for the highly sensitive detection of such cells by measuring the upregulation of surface activation induced markers (AIM)...
2017: PloS One
https://www.readbyqxmd.com/read/29057561/pre-clinical-results-in-pig-to-non-human-primate-islet-xenotransplantation-using-anti-cd40-antibody-2c10r4-based-immunosuppression
#19
Jun-Seop Shin, Jong-Min Kim, Byoung-Hoon Min, Il Hee Yoon, Hyun Je Kim, Jung-Sik Kim, Yong-Hee Kim, Seong-Jun Kang, Jiyeon Kim, Hee-Jung Kang, Dong-Gyun Lim, Eung-Soo Hwang, Jongwon Ha, Sang-Joon Kim, Wan Beom Park, Chung-Gyu Park
BACKGROUND: Islet transplantation is an effective therapy for selected patients with type 1 diabetes with labile glycemic control and hypoglycemic unawareness, but donor organs are limited. Islet xenotransplantation using porcine islets will potentially solve this problem. Although successful proof of concept studies using clinically inapplicable anti-CD154 monoclonal antibody (mAb) in pig-to-non-human primate (NHP) islet xenotransplantation has been demonstrated by several groups worldwide, potentially clinically applicable anti-CD40 (2C10R4) mAb-based studies have not been reported...
October 22, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/29025273/higher-frequencies-of-circulating-icos-il-21-t-follicular-helper-cells-and-plasma-cells-in-patients-with-new-onset-membranous-nephropathy
#20
Zhihui Zhang, Yunpeng Shi, Kunmeng Yang, Rebecca Crew, Haifeng Wang, Yanfang Jiang
BACKGROUND: T follicular helper (TFH) cells and B cells are known to regulate humoral immune responses. This study is aimed at examining the putative contribution of different subsets of circulating of TFH cells and B cells to membranous nephropathy (MN). METHODS: A total of 45 MN patients and 19 healthy controls (HCs) were examined for the number of TFH cells and B cells by flow cytometry. The level of 24-h urinary protein and eGFR were calculated, and the level of serum cytokines was examined...
October 13, 2017: Autoimmunity
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