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https://www.readbyqxmd.com/read/28944998/enhanced-immune-response-induced-by-p5-her2-neu-derived-peptide-pulsed-dendritic-cells-as-a-preventive-cancer-vaccine
#1
Zahra Gholizadeh, Jalil Tavakkol-Afshari, Amin Reza Nikpoor, Seyed Amir Jalali, Mahmoud Reza Jaafari
Dendritic cells are special and powerful antigen-presenting cells that can induce primary immune responses against tumour-associated antigens. They can present antigens via both MHC-I and MHC-II, so they have the ability to stimulate both cytotoxic T lymphocytes and T helper cells. Furthermore, CD8(+) cytotoxic T lymphocytes require activation by CD4(+) T cells. This requires a CD4(+) T cell activator molecule, of which PADRE is one of the best. We chose an approach to use both of these important arms of the immune system...
September 25, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28944916/total-glucosides-of-paeony-ameliorates-tnbs%C3%A2-induced-colitis-by-modulating-differentiation-of-th17-treg-cells-and-the-secretion-of-cytokines
#2
Haihua Lin, Wenyou Zhang, Xuepei Jiang, Renpin Chen, Xielin Huang, Zhiming Huang
The imbalance between effector CD4+ T helper 17 (Th17) and regulatory CD4+ T cells (Treg) cells and their associated cytokines, have been associated with the pathogenesis of inflammatory bowel disease (IBD). Total glycosides of paeony (TGP) is an alternative immunomodulatory agent that is widely used for the treatment of autoimmune diseases. The present study aimed to evaluate the modulatory effect of TGP in a rat model of colitis induced by 2,4,6‑trinitrobenzene sulfonic acid (TNBS). TGP was administered intragastrically 24 h after the TNBS intrarectal instillation for 7 days...
September 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944895/comparison-of-morphology-phenotypes-and-function-between-cultured-human-il%C3%A2-4%C3%A2-dc-and-ifn%C3%A2-dc
#3
Zhiliang Jin, Jing Fan, Yajuan Zhang, Yongxiang Yi, Lili Wang, Dandan Yin, Tao Deng, Wei Ye
Dendritic cells (DCs) as professional antigen presenting cells, are important in the initiation of the primary immune response. The present study compared the morphology, phenotypes and function between monocyte‑derived human DCs produced from a conventional culturing system containing granulocyte‑macrophage colony‑stimulating factor (GM‑CSF) and IL‑4 (IL‑4‑DC) and DCs generated by the stimulation of GM‑CSF and interferon (IFN)‑α (IFN‑DC). When compared with IL‑4‑DC in morphology, IFN‑DC contained more organelles, including endoplasmic reticulum and myelin figures, whereas mature (m)IL‑4‑DC contained more vacuoles in the cells...
September 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944427/morphological-changes-in-the-thymus-composition-of-its-cells-and-subpopulations-of-peripheral-blood-lymphocytes-during-experimental-acute-ulcerative-colitis
#4
O V Makarova, E A Postovalova
Morphological changes in the thymus and composition of its cells and peripheral blood lymphocytes were studied in experiments on C57Bl/6 mice with sodium dextran sulfate-induced acute ulcerative colitis. Severe acute ulcerative colitis in rats was accompanied by stage III-IV accidental involution of the thymus. This state was characterized by inversion of the layers, death of thymocytes, and increase in the number and area of thymic corpuscles from CK19(+) epithelial cells. Flow cytofluorometry revealed an increase in the relative number of F4/80(+) macrophages in the thymus stroma and CD4(-)CD8(-)CD45(+)CD11c(+) dendritic cells and CD326(+)UEA(+)CD205(-) epithelial cells in the medulla...
September 25, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28944344/irf4-couples-anabolic-metabolism-to-th1-cell-fate-determination
#5
Radomir Kratchmarov, Simone A Nish, Wen-Hsuan W Lin, William C Adams, Yen-Hua Chen, Bonnie Yen, Nyanza J Rothman, Ulf Klein, Steven L Reiner
Anabolic metabolism in lymphocytes promotes plasmablast and cytotoxic T cell differentiation at the expense of self-renewal. Heightened expression and function of the transcription factor IFN regulatory factor 4 (IRF4) accompany enhanced anabolic induction and full commitment to functional differentiation in B cells and CD8(+) T cells. In this study, we used a genetic approach to determine whether IRF4 plays an analogous role in Th1 cell induction. Our findings indicate that IRF4 promotes determined Th1 cell differentiation in tandem with anabolic metabolism of CD4(+) T cells...
September 1, 2017: Immunohorizons
https://www.readbyqxmd.com/read/28944199/comparative-analysis-of-cytomegalovirus-retinitis-and-microvascular-retinopathy-in-patients-with-acquired-immunodeficiency-syndrome
#6
Chao Chen, Chun-Gang Guo, Li Meng, Jing Yu, Lian-Yong Xie, Hong-Wei Dong, Wen-Bin Wei
AIM: To compare the clinical manifestation of cytomegalovirus (CMV) retinitis and microvascular retinopathy (MVR) in patients with acquired immunodeficiency syndrome (AIDS) in China. METHODS: A total of 93 consecutive patients with AIDS, including 41 cases of CMV retinitis and 52 cases of MVR were retrospectively reviewed. Highly active antiretroviral therapy (HAART) status was recorded. HIV and CMV immunoassay were also tested. CD4+ T-lymphocyte count and blood CMV-DNA test were performed in all patients...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28944144/osteomyelitis-due-to-multiple-rare-infections-in-a-patient-with-idiopathic-cd4-lymphocytopenia
#7
Nitin Gupta, Sayantan Banerjee, Timitrov, Rohini Sharma, Shambo Guha Roy, Trupti M Shende, Mohammed Tahir Ansari, Gagandeep Singh, Neeraj Nischal, Naveet Wig, Manish Soneja
A 26-year-old male patient presented with features suggestive of osteomyelitis involving the entire left femur, hip joint and knee joint. Culture from the debrided tissue grew Acinetobacter spp. and he was treated with sensitivity based antibiotics but the symptoms did not resolve. The synovial biopsy showed multinucleated giant cells and acid fast bacilli on Ziehl Neelsen stain. Cartridge based nucleic acid amplification test (GeneXpert) was negative. The Mycobacteria growth indicator tube culture was found to be positive for Mycobacterium abscessus...
August 2017: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/28944101/soluble-micb-in-plasma-and-urine-explains-population-expansions-of-nkg2d-cd4-t-cells-inpatients-with-juvenile-onset-systemic-lupus-erythematosus
#8
Satoru Hamada, Andrea Caballero-Benitez, Kate L Duran, Anne M Stevens, Thomas Spies, Veronika Groh
Abnormal NKG2D ligand expression has been implicated in the initiation and maintenance of various auto-inflammatory disorders including systemic lupus erythematosus (SLE). This study's goal was to identify the cellular contexts providing NKG2D ligands for stimulation of the immunosuppressive NKG2D(+)CD4 T cell subset that has been implicated in modulating juvenile-onset SLE disease activity. Although previous observations with NKG2D(+)CD4 T cells in healthy individuals pointed towards peripheral B cell and myeloid cell compartments as possible sites of enhanced NKG2DL presence, we found no evidence for a disease-associated increase of NKG2DL-positivity among juvenile-onset SLE B cells and monocytes...
March 2017: Open Journal of Immunology
https://www.readbyqxmd.com/read/28943543/expression-of-master-regulators-of-t-cell-helper-t-cell-and-follicular-helper-t-cell-differentiation-in-angioimmunoblastic-t-cell-lymphoma
#9
Yosuke Matsumoto, Hisao Nagoshi, Mihoko Yoshida, Seiichi Kato, Junya Kuroda, Kazuho Shimura, Hiroto Kaneko, Shigeo Horiike, Shigeo Nakamura, Masafumi Taniwaki
Objective It has been postulated that the normal counterpart of angioimmunoblastic T-cell lymphoma (AITL) is the follicular helper T-cell (TFH). Recent immunological studies have identified several transcription factors responsible for T-cell differentiation. The master regulators associated with T-cell, helper T-cell (Th), and TFH differentiation are reportedly BCL11B, Th-POK, and BCL6, respectively. We explored the postulated normal counterpart of AITL with respect to the expression of the master regulators of T-cell differentiation...
September 25, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28943467/concomitant-suppression-of-th2-and-th17-cell-responses-in-allergic-asthma-by-targeting-ror%C3%AE-t
#10
Hyeongjin Na, Hoyong Lim, Garam Choi, Byung Keun Kim, Sae-Hoon Kim, Yoon-Seok Chang, Roza Nurieva, Chen Dong, Seon Hee Chang, Yeonseok Chung
BACKGROUND: Allergic asthma is a heterogeneous chronic inflammatory disease in the airway with a massive infiltration of eosinophils or neutrophils mediated by allergen-specific Th2 cells and Th17 cells, respectively. Successful treatment of allergic asthma will therefore require suppression of both Th2 and Th17 cells. OBJECTIVE: We sought to investigate the role of Th17 cell pathway in regulating Th2 cell responses in allergic asthma. METHODS: Allergic asthma was induced by intranasal challenges with proteinase allergens in C57BL/6, Il17a-/-Il17f- /-and RORγt(gfp/gfp) mice...
September 21, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28943194/intradermal-vaccination-with-hollow-microneedles-a-comparative-study-of-various-protein-antigen-and-adjuvant-encapsulated-nanoparticles
#11
Guangsheng Du, Rania M Hathout, Maha Nasr, M Reza Nejadnik, Jing Tu, Roman I Koning, Abraham J Koster, Bram Slütter, Alexander Kros, Wim Jiskoot, Joke A Bouwstra, Juha Mönkäre
In this study, we investigated the potential of intradermal delivery of nanoparticulate vaccines to modulate the immune response of protein antigen using hollow microneedles. Four types of nanoparticles covering a broad range of physiochemical parameters, namely poly (lactic-co-glycolic) (PLGA) nanoparticles, liposomes, mesoporous silica nanoparticles (MSNs) and gelatin nanoparticles (GNPs) were compared. The developed nanoparticles were loaded with a model antigen (ovalbumin (OVA)) with and without an adjuvant (poly(I:C)), followed by the characterization of size, zeta potential, morphology, and loading and release of antigen and adjuvant...
September 21, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28942362/calcitriol-treatment-ameliorates-inflammation-and-blistering-in-mouse-models-of-epidermolysis-bullosa-acquisita
#12
Stefan Tukaj, Katja Bieber, Mareike Witte, Saeedeh Ghorbanalipoor, Enno Schmidt, Detlef Zillikens, Ralf J Ludwig, Michael Kasperkiewicz
A link between hypovitaminosis D and development of autoimmune bullous disorders has been recently suggested, but this association has not been experimentally elaborated. Here, the role of vitamin D was investigated in epidermolysis bullosa acquisita (EBA), an anti-type VII collagen autoantibody-induced blistering skin disease. Oral administration of the hormonally active vitamin D metabolite calcitriol ameliorated clinical disease severity and dermal neutrophil infiltration in both an antibody transfer- and immunization-induced EBA mouse model...
September 20, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28942173/identification-and-characterization-of-cd4-t-cell-epitopes-on-manganese-transport-protein-c-of-staphylococcus-aureus
#13
Wei Yu, Lizi Wang, Mengyao Wang, Shuo Liu, Wanyu Li, Xintong Wang, Xiaoting Li, Simiao Yu, Di Yao, Jinzhu Ma, Liquan Yu, Jing Chen, Zhenyue Feng, Yudong Cui
Manganese transport protein C (MntC) of Staphylococcus aureus represents an excellent vaccine-candidate antigen. The important role of CD4(+) T cells in effective immunity against S. aureus infection was shown; however, CD4(+) T cell-specific epitopes on S. aureus MntC have not been well identified. Here, we used bioinformatics prediction algorithms to evaluate and identify nine candidate epitopes within MntC. Our results showed that peptide M8 emulsified in Freund's adjuvant induced a much higher cell-proliferation rate as compared with controls...
September 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28942020/cd25-expressing-th17-cells-mediate-cd8-t-cell-suppression-in-ctla-4-dependent-mechanisms-in-pancreatic-ductal-adenocarcinoma
#14
Cuicui Lang, Jinyan Wang, Lei Chen
The tumor-associated immune response is governed by the signalling events of various regulatory molecules, one of which is the cytotoxic T lymphocyte-associated antigen 4 (CTLA-4). In conventional T cells, CTLA-4 could outcompete CD28 in binding to CD80/86 but does not produce a co-stimulatory signal, resulting in T cell anergy. CTLA-4 in regulatory T cells (Tregs) could also function in a cell-extrinsic fashion by removing CD80/CD86 from the antigen-presenting cells (APCs), thus preventing further priming of other T cells...
September 20, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28941928/sequential-actions-of-immune-effector-cells-induced-by-viral-activation-of-dendritic-cells-to-eliminate-murine-neuroblastoma
#15
Naonori Kawakubo, Sakura Tanaka, Yoshiaki Kinoshita, Tatsuro Tajiri, Yoshikazu Yonemitsu, Tomoaki Taguchi
PURPOSE: In preclinical trails, we reported the antitumor effect of dendritic cells activated with Sendai virus (rSeV/DC) combined with γ-irradiation against neuroblastoma. However, what kind of effector cells for the combined therapy were used to show the antitumor effect was unclear. In this study, we performed radiation and rSeV/DC therapy in vivo and examined the effector cells involved. METHODS: Dendritic cells were cultured from bone marrow cells, activated with SeV and administered intratumorally at 10(6) weekly for 3weeks...
August 26, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28941323/a-critical-role-for-donor-derived-il-22-in-cutaneous-chronic-gvhd
#16
Kate H Gartlan, Hemamalini Bommiasamy, Katelyn Paz, Andrew N Wilkinson, Mary Owen, Dawn K Reichenbach, Tatjana Banovic, Kimberly Wehner, Faith Buchanan, Antiopi Varelias, Rachel D Kuns, Karshing Chang, Yuri Fedoriw, Thomas Shea, James Coghill, Michael Zaiken, Maximilian W Plank, Paul S Foster, Andrew D Clouston, Bruce R Blazar, Jonathan S Serody, Geoffrey R Hill
Graft-versus-host disease (GVHD) is the major cause of non-relapse morbidity and mortality after allogeneic stem cell transplant (allo-SCT). Prevention and treatment of GVHD remains inadequate and commonly leads to end-organ dysfunction and opportunistic infection. The role of IL-17 and IL-22 in GVHD remains uncertain, due to an apparent lack of lineage fidelity and variable and contextually determined protective and pathogenic effects. We demonstrate that donor T-cell-derived IL-22 significantly exacerbates cutaneous chronic GVHD, and that IL-22 is produced by highly inflammatory donor CD4(+) T-cells post-transplant...
September 23, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28941322/stromal-cell-derived-factor-1-mediates-cardiac-allograft-tolerance-induced-by-human-endometrial-regenerative-cell-based-therapy
#17
Xu Lan, Grace Wang, Xiaoxi Xu, Shanzheng Lu, Xiang Li, Baoren Zhang, Ganggang Shi, Yiming Zhao, Caigan Du, Hao Wang
Endometrial regenerative cells (ERCs) are mesenchymal-like stromal cells, and their therapeutic potential has been tested in the prevention of renal ischemic reperfusion injury, acute liver injury, ulcerative colitis, and immunosuppression. However, their potential in the induction of transplant tolerance has not been investigated. The present study was undertaken to investigate the efficacy of ERCs in inducing cardiac allograft tolerance and the function of stromal cell-derived factor-1 (SDF-1) in the ERC-mediated immunoregulation...
September 23, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28941312/the-dual-role-of-treg-in-cancer
#18
REVIEW
Magdalena Frydrychowicz, Maciej Boruczkowski, Agata Kolecka-Bednarczyk, Grzegorz Dworacki
Regulatory T cells (Tregs) represent a small subpopulation of CD4(+) cells. Tregs are characterized by the expression of transcription factor Forkhead box protein 3 (FoxP3), also known as scurfin. Tregs are modulators of adaptive immune responses and play an important role in maintaining tolerance to self-antigens, providing the suppression associated with tumor microenvironment as well. These immunomodulatory properties are the main reason for the development of numerous therapeutic strategies, designed to inhibit the activity of cancer cells...
September 23, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28941291/dysregulation-of-circulating-tfr-tfh-ratio-in-primary-biliary-cholangitis
#19
Jiajia Zheng, Tiancheng Wang, Li Zhang, Liyan Cui
Follicular helper T (Tfh) cells and follicular regulatory T (Tfr) cells are critical for the development and maintenance of germinal center (GC) and humoral immune responses. Accumulating evidence has demonstrated that the dysregulation of either Tfh cells or Tfr cells contributes to the pathogenesis of autoimmune diseases. We aim to investigate the roles of circulating Tfh cells and circulating Tfr cells in the pathogenesis of primary biliary cholangitis (PBC). 34 PBC patients and 27 health individuals were enrolled in this study...
September 23, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28940477/camp-levels-in-lymphocytes-and-cd4-regulatory-t-cell-functions-are-affected-by-dopamine-receptor-gene-polymorphisms
#20
Marco Cosentino, Natasa Kustrimovic, Marco Ferrari, Emanuela Rasini, Franca Marino
The neurotransmitter dopamine (DA) has prominent effects in the immune system and between the immune cells, CD4+ regulatory T lymphocytes (Treg), a specialized T cell subsets crucial for the control of immune homeostasis, are especially sensitive to DA. Dopaminergic receptors (DR) are grouped into two families according to their pharmacological profile and main second messenger coupling: the D1 -like (D1 and D5 ) which activate adenylate cyclase and the D2 -like (D2 , D3 and D4 ) which inhibit adenylate cyclase and exist in several variants, which have been associated to clinical conditions such as schizophrenia, bipolar disorder, substance abuse and addiction...
September 20, 2017: Immunology
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