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https://www.readbyqxmd.com/read/28919557/synergistic-effects-of-dendritic-cell-targeting-and-laser-microporation-on-enhancing-epicutaneous-skin-vaccination-efficacy
#1
Yoan Machado, Sanne Duinkerken, Veronika Hoepflinger, Melissa Mayr, Evgeniia Korotchenko, Almedina Kurtaj, Isabel Pablos, Markus Steiner, Angelika Stoecklinger, Joyce Lübbers, Maximillian Schmid, Uwe Ritter, Sandra Scheiblhofer, Michael Ablinger, Verena Wally, Sarah Hochmann, Anna M Raninger, Dirk Strunk, Yvette van Kooyk, Josef Thalhamer, Richard Weiss
Due to its unique immunological properties, the skin is an attractive target tissue for allergen-specific immunotherapy. In our current work, we combined a dendritic cell targeting approach with epicutaneous immunization using an ablative fractional laser to generate defined micropores in the upper layers of the skin. By coupling the major birch pollen allergen Bet v 1 to mannan from S. cerevisiae via mild periodate oxidation we generated hypoallergenic Bet-mannan neoglycoconjugates, which efficiently targeted CD14+ dendritic cells and Langerhans cells in human skin explants...
September 14, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28911868/central-and-peripheral-expression-sites-of-phoenixin-14-immunoreactivity-in-rats
#2
Philip Prinz, Sophie Scharner, Tiemo Friedrich, Martha Schalla, Miriam Goebel-Stengel, Matthias Rose, Andreas Stengel
Phoenixin is a pleiotropic peptide involved in reproduction, anxiety and recently also implicated in the control of food intake. Besides the 20-amino acid phoenixin, the 14-amino acid phoenixin-14 also shows bioactive properties. However, the expression sites of phoenixin-14 in the brain and peripheral tissues are not yet described in detail. Therefore, a mapping of the brain and peripheral tissues from male and female Sprague-Dawley rats with a specific phoenixin-14 antibody was performed using western blot and immunohistochemistry...
September 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28904199/calcitonin-gene-related-peptide-induces-hiv-1-proteasomal-degradation-in-mucosal-langerhans-cells
#3
Morgane Bomsel, Yonatan Ganor
The neuro-immune dialogue between peripheral neurons and Langerhans cells (LCs) within mucosal epithelia protects against incoming pathogens. LCs rapidly internalize human immunodeficiency virus type 1 (HIV-1) upon its sexual transmission and then trans-infect CD4+ T-cells. We recently found that the neuropeptide calcitonin gene-related peptide (CGRP), secreted mucosally from peripheral neurons, inhibits LCs-mediated HIV-1 trans-infection. Herein, we investigated the mechanism of CGRP-induced inhibition, focusing on HIV-1 degradation in LCs and its interplay with trans-infection...
September 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28903440/evaluation-of-pituitary-uptake-incidentally-identified-on-18-f-fdg-pet-ct-scan
#4
Huijun Ju, Jinxin Zhou, Yu Pan, Jing Lv, Yifan Zhang
The clinical significance of pituitary uptake on routine whole body (18)F-fluorodeoxyglucose (FDG) positron emission tomography/computer tomography (PET/CT) is not completely characterized. We seek to assess the potential differential diagnosis/underlying etiology of pituitary FDG uptake incidentally identified on routine PET/CT scans. A total of 24,007 PET/CT whole body scans in recent 5 years were retrospectively reviewed. Patients with maximum standardized uptake value (SUVmax) > 4.1 in the pituitary glands were identified...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28894928/enhanced-dendritic-cells-and-regulatory-t-cells-in-the-dermis-of-porokeratosis
#5
Kanako Matsuyama, Yoko Mizutani, Tomoko Takahashi, En Shu, Hiroyuki Kanoh, Tatsuhiko Miyazaki, Mariko Seishima
Porokeratosis is characterized clinically by annular lesions and histologically by the presence of a cornoid lamella (CL) in the epidermis. The underlying mechanism of porokeratosis development remains unclear. We performed immunohistochemical staining of CD1a, langerin, Ki67, CD3, CD4, CD8, FOXP3, and RANKL (receptor activator of nuclear factor κB ligand) in samples from 17 porokeratosis lesions and analyzed the differences in staining patterns among the CL, the inner part of the annular ridge (IC), and the adjacent normal skin (ANS)...
September 11, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28894739/immune-modulating-activity-of-hydrogel-microparticles-contributes-to-the-host-defense-in-a-murine-model-of-cutaneous-anthrax
#6
Allison L Teunis, Taissia G Popova, Virginia Espina, Lance A Liotta, Serguei G Popov
We recently reported that the open-mesh (0.7 μ) polyacrylamide microparticles (MPs) with internally-coupled Cibacron affinity dye demonstrate protective effect in mice challenged into footpads with high doses (200 LD50) of anthrax (Sterne) spores. A single injection of MPs before spore challenge reduces inflammatory response, delays onset of mortality and promotes survival. In this study, we show that the effect of MPs was substantially increased at the lower spore dose (7 LD50). The inflammation of footpads was reduced to the background level, and 60% of animals survived for 16 days while all untreated infected animals died within 6 days with strong inflammation...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28893957/anti-inflammatory-role-of-langerhans-cells-and-apoptotic-keratinocytes-in-ultraviolet-b-induced-cutaneous-inflammation
#7
Mayumi Hatakeyama, Atsushi Fukunaga, Ken Washio, Kumiko Taguchi, Yoshiko Oda, Kanako Ogura, Chikako Nishigori
UV radiation, particularly UVB, is the major risk factor for the induction of skin cancer, and it induces skin inflammation and immunosuppression. Although reports documented that Langerhans cells (LCs) play various roles in photobiology, little is known about whether they contribute to UVB-induced cutaneous inflammation. Recently, the anti-inflammatory effect of apoptotic cells was noted. This study focuses on the roles of LCs and apoptotic cells in UVB-induced cutaneous inflammation. We show that LCs are essential for resolution of UVB-induced cutaneous inflammation...
September 11, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28893946/a-radial-axis-defined-by-semaphorin-to-neuropilin-signaling-controls-pancreatic-islet-morphogenesis
#8
Philip T Pauerstein, Krissie Tellez, Kirk B Willmarth, Keon Min Park, Brian Hsueh, H Efsun Arda, Xueying Gu, Haig Aghajanian, Karl Deisseroth, Jonathan A Epstein, Seung K Kim
The islets of Langerhans are endocrine organs characteristically dispersed throughout the pancreas. During development, endocrine progenitors delaminate, migrate radially, and cluster to form islets. Despite the distinctive distribution of islets, spatially localized signals that control islet morphogenesis have not been discovered. Here we identify a radial signaling axis that instructs developing islet cells to disperse throughout the pancreas. A screen of pancreatic extracellular signals identified factors that stimulated islet cell development...
September 11, 2017: Development
https://www.readbyqxmd.com/read/28890293/epidermal-barrier-reaction-to-an-in-vitro-psoriatic-microenvironment
#9
Elena Donetti, Laura Cornaghi, Francesca Arnaboldi, Federica Ricceri, Leonardo Pescitelli, Martina Maiocchi, Francesco Carriero, Franz Baruffaldi Preis, Francesca Prignano
Keratinocytes (KCs) and Langerhans cells (LCs) contribute to create the epidermal barrier. To form a functional epidermis, KCs express filaggrin and Toll-like Receptors (TLRs). LCs are the first line of epidermal defence and can be activated by interleukin (IL)-17 and Tumor Necrosis Factor (TNF)-alpha. In psoriasis, an alteration of TLR expression, a defective expression of filaggrin, and LC activation occur. In organotypic cultures of human skin we investigated the interplay between IL-17 and TNF-alpha on i) expression of filaggrin, TLR2, 7 and 9, and Nuclear Factor (NF)-kB localization by immunofluorescence and ii) LC ultrastructural features by transmission electron microscopy...
September 7, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28888027/dermatopathic-lymphadenopathy-with-langerhans-cell-chimerism-in-graft-versus-host-disease-of-the-skin
#10
Andreas Kreft, Kristina Krümpelmann, Andreas Rosenwald, David Hollemann, Eva Maria Wagner-Drouet
Dermatopathic lymphadenopathy (DL) is well-known in inflammatory skin disease; however, it has not been reported in graft-versus-host disease (GvHD) after allogeneic stem cell transplantation. Here, we report two cases of DL in patients with acute GvHD of the skin and demonstrate complete donor chimerism of Langerhans cells within the lymph nodes. This article is protected by copyright. All rights reserved.
September 9, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28886491/interleukin-34-from-pathogenesis-to-clinical-applications
#11
REVIEW
Muhammad Baghdadi, Hiraku Endo, Yoshino Tanaka, Haruka Wada, Ken-Ichiro Seino
Interleukin-34 (IL-34) is a hematopoietic cytokine that was described for the first time in 2008 as a second ligand of CSF1R in addition to M-CSF. IL-34 and M-CSF share no sequence homology, but have similar functions, affecting the biology of myeloid cell lineage. In contrast to M-CSF, IL-34 shows unique signaling and expression patterns. Physiologically, IL-34 expression is restricted to epidermis and CNS, acting as a regulator of Langerhans cells and microglia, respectively. However, IL-34 expression can be induced and regulated by NF-κB under pathological conditions...
September 5, 2017: Cytokine
https://www.readbyqxmd.com/read/28880752/evaluation-of-osteopontin-expression-in-chronic-wounds-a-potential-prognostic-and-therapeutic-biomarker
#12
S Chimento, V Billero, L Cavallin, M Romanelli, M Nadji, P Romanelli
OBJECTIVE: Osteopontin (OPN) is abundantly expressed during tissue repair, acting as a powerful chemokine that recruits inflammatory cells such as neutrophils, macrophages, and Langerhans cells. The role of OPN in chronic wounds has not been explored. In this study, we assess the expression levels of OPN in chronic wounds to assess its potential contribution to the exacerbated inflammation seen in chronic ulcers, which is thought to contribute to poor healing. METHODS: This retrospective study included archived biopsies of chronic wounds from several aetiologies...
September 1, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28880370/langerhans-cell-histiocytosis-in-an-adult-female-presenting-with-widespread-confluent-crusted-papules-and-review-of-adult-cases-confined-to-skin
#13
Shiyu Zhang, Yuehua Liu
No abstract text is available yet for this article.
September 7, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28878130/an-ancestral-retroviral-protein-identified-as-a-therapeutic-target-in-type-1-diabetes
#14
Sandrine Levet, Julie Medina, Julie Joanou, Amandine Demolder, Nelly Queruel, Kevin Réant, Matthieu Normand, Marine Seffals, Julie Dimier, Raphaële Germi, Thomas Piofczyk, Jacques Portoukalian, Jean-Louis Touraine, Hervé Perron
Human endogenous retroviruses (HERVs), remnants of ancestral viral genomic insertions, are known to represent 8% of the human genome and are associated with several pathologies. In particular, the envelope protein of HERV-W family (HERV-W-Env) has been involved in multiple sclerosis pathogenesis. Investigations to detect HERV-W-Env in a few other autoimmune diseases were negative, except in type-1 diabetes (T1D). In patients suffering from T1D, HERV-W-Env protein was detected in 70% of sera, and its corresponding RNA was detected in 57% of peripheral blood mononuclear cells...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28877978/how-i-manage-pulmonary-langerhans-cell-histiocytosis
#15
Gwenaël Lorillon, Abdellatif Tazi
Pulmonary Langerhans cell histiocytosis (PLCH) is a rare sporadic cystic lung disease of unknown aetiology that is characterised by the infiltration and destruction of the wall of distal bronchioles by CD1a(+) Langerhans-like cells. In adults, PLCH is frequently isolated and affects young smokers of both sexes. Recent multicentre studies have led to the more standardised management of patients in clinical practice. Smoking cessation is essential and is occasionally the only suitable intervention. Serial lung function testing is important because a significant proportion of patients may experience an early decline in forced expiratory volume in 1 s and develop airflow obstruction...
September 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28877492/spatially-organized-%C3%AE-cell-subpopulations-control-electrical-dynamics-across-islets-of-langerhans
#16
Matthew J Westacott, Nurin W F Ludin, Richard K P Benninger
Understanding how heterogeneous cells within a multicellular system interact and affect overall function is difficult without a means of perturbing individual cells or subpopulations. Here we apply optogenetics to understand how subpopulations of β-cells control the overall [Ca(2+)]i response and insulin secretion dynamics of the islets of Langerhans. We spatiotemporally perturbed electrical activity in β-cells of channelrhodopsin2-expressing islets, mapped the [Ca(2+)]i response, and correlated this with the cellular metabolic activity and an in silico electrophysiology model...
September 5, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28870465/inhibition-of-il-17-committed-t-cells-in-a-murine-psoriasis-model-by-a-vitamin-d-analogue
#17
Nobuhiro Kusuba, Akihiko Kitoh, Teruki Dainichi, Tetsuya Honda, Atsushi Otsuka, Gyohei Egawa, Saeko Nakajima, Yoshiki Miyachi, Kenji Kabashima
BACKGROUND: A better understanding of the means by which topical vitamin D analogues exert their therapeutic effect on psoriasis is of theoretical and practical importance. OBJECTIVE: We sought to clarify whether and how the topical vitamin D analogue calcipotriol (CAL) controls the IL-17A-mediated pathogenesis of murine psoriasis-like dermatitis in vivo. METHODS: Psoriasis-like dermatitis was induced by the topical application of an imiquimod (IMQ)-containing cream on the murine ear for 4 to 6 consecutive days...
September 1, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28870403/high-antigen-processing-machinery-component-expression-in-langerhans-cells-from-melanoma-patients-sentinel-lymph-nodes
#18
Maria Raffaella Romoli, Paola Di Gennaro, Gianni Gerlini, Serena Sestini, Paola Brandani, Soldano Ferrone, Lorenzo Borgognoni
Langerhans cells (LCs) from melanoma patients sentinel lymph nodes (SLN) are poor T cell activators mostly due to an immature immunophenotype. However Antigen Presenting Machinery (APM) role is unknown. We investigated HLA-class I APM components (Delta, LMP-7/10, TAP-1, Calnexin, Tapasin, β2-microglobulin and HLA-A,B,C) in LCs from healthy donors skin and melanoma patients SLN. APM component levels were low in immature epidermal LCs and significantly increased after maturation (p<0.05); their levels were significantly high in SLN LCs (p<0...
August 30, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28868307/atlanto-axial-langerhans-cell-histiocytosis-in-a-child-presented-as-torticollis
#19
Miniar Tfifha, Mehdi Gaha, Nadia Mama, Mohamed Taher Yacoubi, Saoussen Abroug, Hela Jemni
Langerhans cell histiocytosis (LCH) is a rare condition mostly seen in children and adolescents. Eosinophilic granuloma (EG) is one of its three clinical entities and is considered as a benign osteolytic lesion. Many reports of patients with spine histiocytosis are well documented in the literature but it is not the case of atlantoaxial localization. We report here a new observation of atlantoaxial LCH in a 4-year-old boy revealed by persistent torticollis. He was successfully treated with systemic chemotherapy and surgery...
August 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28868020/erdheim-chester-disease-the-importance-of-information-integration
#20
Anna Nikonova, Khashayar Esfahani, Guillaume Chausse, Stephan Probst, Tina Petrogiannis-Haliotis, Hans Knecht, Genevieve Gyger
BACKGROUND: Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis disorder that utilizes the RAS-RAF-MEK-ERK pathway. It has a highly variable clinical presentation, where virtually any organ can be involved, thus having the potential of posing a great diagnostic challenge. Over half of the reported cases have the BRAF V600E mutation and have shown a remarkable response to vemurafenib. CASE PRESENTATION: We describe herein a patient with a history of stroke-like symptoms and retroperitoneal fibrosis that on initial pathology raised the possibility of IgG4-related disease...
May 2017: Case Reports in Oncology
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