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https://www.readbyqxmd.com/read/28732440/intravenous-injection-of-myelin-oligodendrocyte-glycoprotein-coated-plga-microparticles-have-tolerogenic-effects-in-experimental-autoimmune-encephalomyelitis
#1
Mehrdad Gholamzad, Masoumeh Ebtekar, Mehdi Shafiee Ardestani
The abnormal function of the T lymphocytes causes a range of autoimmune diseases, particularly multiple sclerosis; hence, several methods have been used to treat these disorders through the induction of antigen-specific tolerance in T cells. The present study aims to use a simple and low-cost method to produce poly (lactic-co-glycolic acid) (PLGA) nanoparticles for carrying antigens and inducing antigen-specific tolerance. In this study, PLGA nanoparticles were produced using the water/oil/water (W/O/W) method...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28732437/effect-of-microrna-21-transfection-on-in-vitro-differentiation-of-human-naive-cd4-t-cells-to-regulatory-t-cells
#2
Haideh Namdari, Mojgan Ghayedi, Jamshid Hadjati, Farhad Rezaei, Kurosh Kalantar, Parisa Rahimzadeh, Eisa Salehi
Regulatory T cells (Tregs) are important components of the immune system that modulate responses of other cells. These cells are involved in peripheral tolerance mechanisms, so defect in development and function of these cells can result in autoimmune disease. Increasing evidence supports the role of microRNAs-21 (miR-21) in the regulation of forkhead box P3 (Foxp3) expression in Tregs. We aimed to determine whether miR-21 transfection to naive CD4+ T cells can be useful in generation of iTregs in-vitro. We investigated in-vitro differentiation of miR-21-transfected naive CD4+ T cells to iTregs and compared these iTregs to cytokine-differentiated iTregs and control group...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28732312/drug-eluting-scaffold-inhibited-in-vivo-pancreatic-tumorigenesis-by-engaging-murine-ccr4-cd8-t-cells
#3
Qian Zhan, Baiyong Shen, Yuan Fang, Xiaxing Deng, Hao Chen, Jiabin Jin, Chenghong Peng, Hongwei Li
CCL17 is well known for its ability to engage CCR4(+)CD8(+) T cells, which have been shown to play a critical role in preventing tumorigenesis. In this study, we attempted to inhibit in vivo pancreatic tumorigenesis by engaging murine CCR4(+)CD8(+) T cells through a drug-eluting scaffold with a payload of CCL17. The drug-eluting scaffold was fabricated by electrospinning polyglyconate and porcine gelatin. The electrospun scaffold featured randomly distributed non-woven fibers with diameters ranging from 1μm to 4μm...
July 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28732279/turbocharging-vaccines-emerging-adjuvants-for-dendritic-cell-based-therapeutic-cancer-vaccines
#4
REVIEW
Mansi Saxena, Nina Bhardwaj
Development of therapeutic cancer vaccines has been hindered by the many pro-tumorigenic mechanisms at play in cancer patients that serve to suppress both antigen presenting cells and T cells. In face of these obstacles, cancer vaccines are most likely to promote anti-tumorigenic immune responses only when formulated with strong adjuvants, and in combination with new immune interventions designed to reverse immune suppression and exhaustion of T cells in the tumor microenvironment. Dendritic cells (DCs) are often termed 'nature's adjuvant' due to their exceptional capacity for initiating both innate and adaptive immune responses...
July 18, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28732145/evaluation-of-primary-mediastinal-large-b-cell-lymphoma-by-flow-cytometry
#5
Sindhu Cherian, Jonathan R Fromm
BACKGROUND: Primary mediastinal large B cell lymphoma (PMLBCL) is a B cell non-Hodgkin lymphoma (B-NHL) that shows morphologic, immunophenotypic, and genetic similarities to classical Hodgkin lymphoma (CHL). We evaluated the neoplastic and reactive infiltrate of PMLBCL by flow cytometry (FC). METHODS: 24 cases of PMLBCL were retrospectively characterized using FC combinations for B-NHL, T-NHL, and CHL. RESULTS: The CHL assay identified the neoplastic population (NP) in all cases, while the B-NHL assay identified the NP in 18 of 24 cases...
July 21, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28732135/synovial-immunophenotype-and-anti-citrullinated-protein-antibodies-in-ra-patients-relationship-to-treatment-response-and-radiological-prognosis
#6
Carl Orr, Aurelie Najm, Monika Biniecka, Trudy McGarry, Chin-Teck Ng, Francis Young, Ursula Fearon, Douglas J Veale
OBJECTIVE: Serum anti-citrullinated peptide antibodies (ACPA) may be present before development of rheumatoid arthritis (RA) and may predict more severe, erosive disease. This study examines synovial tissue immunophenotype according to ACPA status in RA patients, response to treatment and erosive status. METHODS: Consecutive RA patients were prospectively recruited and underwent clinical and serological assessment before and after treatment. Radiological assessment was performed at the time of clinical follow up...
July 21, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28732046/qualitative-differences-in-cellular-immunogenicity-elicited-by-hepatitis-c-virus-t-cell-vaccines-employing-prime-boost-regimens
#7
Wendy G Tan, Iryna Zubkova, Alla Kachko, Frances Wells, Heiko Adler, Gerd Sutter, Marian E Major
T-cell based vaccines have been considered as attractive candidates for prevention of hepatitis C virus (HCV) infections. In this study we compared the magnitude and phenotypic characteristics of CD8+ T-cells induced by three commonly used viral vectors, Adenovirus-5 (Ad5), Vaccinia virus (VV) and Modified Vaccinia Ankara (MVA) expressing the HCV NS3/4A protein. C57/BL6 mice were primed with DNA expressing NS3/4A and boosted with each of the viral vectors in individual groups of mice. We then tracked the vaccine-induced CD8+ T-cell responses using pentamer binding and cytokine production analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28731999/-duodenal-linphoma-asociated-to-strongyloides-stercoralis-infection-two-types-of-htlv-1-infection
#8
Julissa Guevara Miranda, Patricia Guzmán Rojas, Jorge Espinoza-Ríos, Fernando Mejía Cordero
Infection by the Human T- Lymphotropic virus I (HTLV-1) causes Adult T cell Leukemia-lymphoma (ATLL), being the duodenal involvement rare. Commonly, patients co-infected with HTLV-1 and Strongyloides stercoralis are seen due to the lack of TH2 response found on these patients. We describe a 48-year- old woman, from the jungle of Peru, with a family history of HTLV-1 infection, who presented with a History of chronic diarrhea and weight loss. HTLV-1 infection with ATLL and strongyloidiasis were diagnosed. Ivermectin treatment and chemotherapy were initiated, being stabilized, and discharged...
April 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28731516/mir-181d-regulates-human-dendritic-cell-maturation-through-nf-%C3%AE%C2%BAb-pathway
#9
Xian Wei Su, Gang Lu, Chi Kwan Leung, Qiang Liu, Yi Li, Kam Sze Tsang, Shi Dou Zhao, Danny Tat Ming Chan, Hsiang Fu Kung, Wai Sang Poon
OBJECTIVES: MicroRNAs (miRNAs) are considered as the cellular regulators which post-transcriptionally modulate gene expression in diverse biological processes including cell development and immunity. In this study, we investigated functions of miR-181d in dendritic cells (DCs) maturation, and the underlying mechanisms were also explored. MATERIALS AND METHODS: Here we did the miRNA screening in human DCs in response to lipopolysaccharides (LPS) by quantitative real-time PCR (qRT-PCR)...
July 21, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28731485/th17-regulatory-t-cell-imbalance-in-sepsis-patients-with-multiple-organ-dysfunction-syndrome-attenuated-by-high-volume-hemofiltration
#10
Jiguang Guo, Wu Tao, Dan Tang, Jianbin Zhang
BACKGROUND: We assessed the Th17 (T-helper cell)/Treg (Regulatory T cell) imbalance in sepsis patients with multiple organ dysfunction syndrome (MODS) and the clinical benefits of continuous high-volume hemofiltration (HVHF). METHODS: 48 sepsis patients, including 22 patients with MODS (MODS group, n = 22) and 26 without (non-MODS group, n = 26), and 20 healthy volunteer controls were enrolled. The patients in MODS group were randomly divided into the continuous blood purification (CBP) group (n = 11) receiving conventional comprehensive treatment plus high-volume hemofiltration and the non-CBP group (n = 11) receiving conventional comprehensive treatment only...
July 14, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28731459/malignant-t-cells-activate-endothelial-cells-via-il-17%C3%A2-f
#11
B Lauenborg, I V Litvinov, Y Zhou, A Willerslev-Olsen, C M Bonefeld, C Nastasi, S Fredholm, L M Lindahl, D Sasseville, C Geisler, M M Wasik, T Krejsgaard, L M R Gjerdrum, L Iversen, N Odum, A Woetmann
No abstract text is available yet for this article.
July 21, 2017: Blood Cancer Journal
https://www.readbyqxmd.com/read/28731456/upregulation-of-tet-activity-with-ascorbic-acid-induces-epigenetic-modulation-of-lymphoma-cells
#12
N Shenoy, T Bhagat, E Nieves, M Stenson, J Lawson, G S Choudhary, T Habermann, G Nowakowski, R Singh, X Wu, A Verma, T E Witzig
The Ten Eleven Translocation (TET) enzymes have been found to be mutated in both diffuse large B-cell (DLBCL) and peripheral T-cell (PTCL) lymphomas resulting in DNA hypermethylation. Recent studies in embryonal stem cells showed that ascorbic acid (AA) is a cofactor for TET with a binding site at the catalytic domain, and enhances TET activity. We hypothesized that AA could potentially enhance TET activity in lymphoma cells to cause DNA demethylation, reactivate expression of tumor suppressor genes and enhance chemosensitivity...
July 21, 2017: Blood Cancer Journal
https://www.readbyqxmd.com/read/28731407/t-cell-receptor-repertoires-of-mice-and-humans-are-clustered-in-similarity-networks-around-conserved-public-cdr3-sequences
#13
Asaf Madi, Asaf Poran, Eric Shifrut, Shlomit Reich-Zeliger, Erez Greenstein, Irena Zaretsky, Tomer Arnon, Francois Van Laethem, Alfred Singer, Jinghua Lu, Peter D Sun, Irun R Cohen, Nir Friedman
Diversity of T cell receptor (TCR) repertoires, generated by somatic DNA rearrangements, is central to immune system function. However, the level of sequence similarity of TCR repertoires within and between species has not been characterized. Using network analysis of high-throughput TCR sequencing data, we found that abundant CDR3-TCRβ sequences were clustered within networks generated by sequence similarity. We discovered a substantial number of public CDR3-TCRβ segments that were identical in mice and humans...
July 21, 2017: ELife
https://www.readbyqxmd.com/read/28731372/exploring-the-effect-of-vitamin-d3-supplementation-on-the-anti-ebv-antibody-response-in-relapsing-remitting-multiple-sclerosis
#14
Linda Rolf, Anne-Hilde Muris, Amandine Mathias, Renaud Du Pasquier, Inga Koneczny, Giulio Disanto, Jens Kuhle, Sreeram Ramagopalan, Jan Damoiseaux, Joost Smolders, Raymond Hupperts
BACKGROUND: Epstein-Barr virus (EBV) infection and vitamin D insufficiency are potentially interacting risk factors for multiple sclerosis (MS). OBJECTIVES: To investigate the effect of high-dose vitamin D3 supplements on antibody levels against the EBV nuclear antigen-1 (EBNA-1) in patients with relapsing-remitting multiple sclerosis (RRMS) and to explore any underlying mechanism affecting anti-EBNA-1 antibody levels. METHODS: This study utilized blood samples from a randomized controlled trial in RRMS patients receiving either vitamin D3 (14,000 IU/day; n = 30) or placebo ( n = 23) over 48 weeks...
July 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28731276/attempt-to-harvest-a-sufficient-number-of-mononuclear-cells-in-an-appropriate-blood-product-volume-by-modification-of-the-default-apheresis-setting
#15
Yumi Tanaka, Kohshi Ohishi, Toshiki Sawai, Hitoshi Iwasaki, Shinichi Kageyama, Masahiro Masuya, Takeshi Matsumoto, Takashi Tanigawa, Hideo Wada, Hiroshi Shiku, Masaaki Ito, Naoyuki Katayama
To harvest for T cell therapy, a 1.6-fold higher number of CD3(+) T cells was collected with MNC mode (N = 10) compared with Auto PBSC mode (N = 5) in COBE Spectra cell separator, but the blood product volume was increased by 3.5-fold. For therapeutic angiogenesis therapy, apheresis was initially performed using Auto PBSC mode (N = 4) to fine tune the blood product volume to omit cell concentration, but the collected number of mononuclear cells was lower than expected. However, an increase of the harvest cycle number from 3...
July 21, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28731226/curcumin-converts-foxp3-regulatory-t-cells-to-t-helper-1-cells-in-patients-with-lung-cancer
#16
JianYong Zou, ChunHua Su, HongHe Luo, YiYan Lei, Bo Zeng, HaoShuai Zhu, ZhenGuang Chen
The regulatory T cells (Treg) play an important role in the tumor tolerance. The methods to regulate the Treg population in cancer-bearing hosts are limited currently. The effect of curcumin on inhibiting cancer has been recognized, but the mechanism remains elusive. This study tests a hypothesis that administration of curcumin down regulates Tregs in lung cancer (LC) patients. In this study, a group of LC patients was treated with curcumin. The peripheral Tregs and T helper (Th) 1 cells were analyzed by flow cytometry...
July 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28731168/osteoclast-regulation-of-osteoblasts-via-rank%C3%A2-rankl-reverse-signal-transduction-in%C3%A2-vitro
#17
Shiqian Zhang, Xiaoyu Wang, Guojun Li, Yang Chong, Jie Zhang, Xinzhen Guo, Baoxin Li, Zhenggang Bi
The treatment of osteoporosis typically inhibits the activity of osteoclasts, which subsequently results in the suppression of bone formation and maintenance, however the underlying mechanism remains to be elucidated. The receptor activator of nuclear factor κ‑B ligand (RANKL)‑receptor activator of nuclear factor κ‑B (RANK) signaling axis is important in the osteoblast regulation of osteoclasts. RANKL surface‑bound molecules expressed on T cells stimulate a reverse signaling transduction in order to regulate the T cells, therefore the present study hypothesized that RANKL expressed on osteoblasts may transfer reverse signals to regulate osteoblasts...
July 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731046/pd-l1-expression-and-the-immune-microenvironment-in-primary-invasive-lobular-carcinomas-of-the-breast
#18
Elizabeth D Thompson, Janis M Taube, Rebecca J Asch-Kendrick, Aleksandra Ogurtsova, Haiying Xu, Rajni Sharma, Alan Meeker, Pedram Argani, Leisha A Emens, Ashley Cimino-Mathews
Tumor-infiltrating lymphocytes and immune checkpoint proteins such as PD-L1 are potential prognostic factors and therapeutic targets in breast cancer. Most studies characterizing the breast tumor immune microenvironment have focused on ductal carcinomas. Here we investigate the tumor microenvironment of primary invasive lobular carcinomas. Previously constructed tissue microarrays of 47 lobular carcinomas were labeled by immunohistochemistry for PD-L1, CD8, CD20, and FoxP3. The stromal immune infiltrate density was qualitatively scored as a percentage of tumor area: 1+ (<5%); 2+ (5-10%); 3+ (10-15%); or 4+ (>50%)...
July 21, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28730684/chest-wall-lymphomas-fine-needle-aspiration-cytodiagnosis-and-review-of-the-literature
#19
D K Das, S K Pathan, S K M Al-Waheeb, A E Ali, M Joneja, M G Al-Kanderi, B John, M K Mallik
OBJECTIVE: Compared to other chest wall malignancies, lymphoma is a common disease. However, published literature on a series of lymphoma cases involving the chest wall is scarce. The aim of the present study, was to describe experience with chest wall swellings diagnosed as lymphoid neoplasms on fine needle aspiration (FNA) cytology. METHODS: Eleven chest wall swellings were diagnosed as lymphoid neoplasms on FNA over a period of 15 years (January 2000-December 2014)...
July 21, 2017: Cytopathology: Official Journal of the British Society for Clinical Cytology
https://www.readbyqxmd.com/read/28730633/pd-1-expression-on-cd8-t-cells-regulates-their-differentiation-within-lung-allografts-and-is-critical-for-tolerance-induction
#20
T Takahashi, H M Hsiao, S Tanaka, W Li, R Higashikubo, D Scozzi, A Bharat, J H Ritter, A S Krupnick, A E Gelman, D Kreisel
Immunological requirements for rejection and tolerance induction differ between various organs. While memory CD8(+) T cells are considered a barrier to immunosuppression-mediated acceptance of most tissues and organs, tolerance induction after lung transplantation is critically dependent on central memory CD8(+) T lymphocytes. Here we demonstrate that costimulation blockade-mediated tolerance after lung transplantation is dependent on PD-1 expression on CD8(+) T cells. In the absence of PD-1 expression, CD8(+) T cells form prolonged interactions with graft-infiltrating CD11c(+) cells, their differentiation is skewed towards an effector memory phenotype and grafts are rejected acutely...
July 20, 2017: American Journal of Transplantation
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