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https://www.readbyqxmd.com/read/28446855/eosinophilic-granuloma-in-jaw-bone-a-pare-pediatric-case-report
#1
Karthiga Kannan, Naif Alwithanani, Mohamed Salama, Manoj Kumar, Roshan Uthappa, Mazood Ahamed
BACKGROUND: Eosinophilic granuloma (EG), one of the three clinical forms of Langerhans cell histiocytosis (LCH), is a benign inflammatory reaction to an unknown etiologic agent. It most commonly occurs in children and young adults. The most frequently involved bones are the skull, the ribs and the femurs. Alongside the cranium, the maxilla and mandible can also be affected. CASE DETAILS: Herein, we report a case of eosinophilic granuloma in a ten years old boy involving posterior quadrants upper and lower jaws as a destructive lesion involving gingiva, periodontium and alveolar bone...
September 2016: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/28445138/killer-cell-immunoglobulin-like-receptor-2dl4-is-expressed-in-and-suppresses-the-cell-growth-of-langerhans-cell-histiocytosis
#2
Yusuke Takei, Chiyuki Ueshima, Tatsuki R Kataoka, Masahiro Hirata, Akihiko Sugimoto, Mariyo Rokutan-Kurata, Koki Moriyoshi, Kazuo Ono, Ichiro Murakami, Sanju Iwamoto, Hironori Haga
Killer cell immunoglobulin-like receptor (KIR) 2DL4 (CD158d) is a receptor for human leukocyte antigen-G. The function of KIR2DL4 has been reported in human natural killer cell lymphoma and mastocytosis, but not in Langerhans cell histiocytosis (LCH). Herein, we examined the expression and function of KIR2DL4 in LCHs. In pathological specimens, 27 of 36 LCH cases (75.0%) were immunohistochemically positive for KIR2DL4. Its expression was independent of age, gender, location, multi- or single-system, and the status of BRAFV600E immunostaining...
April 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28444954/clinical-presentation-and-outcome-of-children-with-central-diabetes-insipidus-associated-with-a-self-limited-or-transient-pituitary-stalk-thickening-diagnosed-as-infundibuloneurohypophysitis
#3
J Schaefers, M Cools, K De Waele, I Gies, V Beauloye, P Lysy, I Francois, D Beckers, J De Schepper
OBJECTIVE: Despite lymphocytic or autoimmune infundibuloneurohypophysitis (INH) is an increasingly recognized etiology in children with central diabetes insipidus, clinical data on epidemiology (clinical evolution, predisposing factors, complications), diagnosis and management of this entity are limited and mostly based on published case reports. The aim of this study was to gain a broader insight in the natural history of this disease by analyzing the clinical presentation, radiological pituitary stalk changes, associated autoimmunity and hormonal deficiencies in children with CDI and a self-limiting or transient stalk thickening (ST), diagnosed as autoimmune INH, during the last 15 years in four Belgian university hospitals...
April 26, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28444728/circulating-cell-free-braf-v600e-as-a-biomarker-in-children-with-langerhans-cell-histiocytosis
#4
Sébastien Héritier, Zofia Hélias-Rodzewicz, Hélène Lapillonne, Nathalie Terrones, Sonia Garrigou, Corinne Normand, Mohamed-Aziz Barkaoui, Jean Miron, Geneviève Plat, Nathalie Aladjidi, Anne Pagnier, Anne Deville, Marion Gillibert-Yvert, Despina Moshous, Alain Lefèvre-Utile, Anne Lutun, Catherine Paillard, Caroline Thomas, Eric Jeziorski, Philippe Nizard, Valérie Taly, Jean-François Emile, Jean Donadieu
The BRAF(V600E) mutation is reported in half of patients with Langerhans cell histiocytosis (LCH). This study investigated the detection of the BRAF(V600E) allele in circulating cell-free (ccf) DNA in a paediatric LCH cohort. Children with BRAF(V600E) -mutated LCH were investigated to detect ccf BRAF(V600E) at diagnosis (n = 48) and during follow-up (n = 17) using a picolitre-droplet digital PCR assay. At diagnosis, ccf BRAF(V600E) was positive in 15/15 (100%) patients with risk-organ positive multisystem (RO+ MS) LCH, 5/12 (42%) of patients with RO- MS LCH and 3/21 (14%) patients with single-system (SS) LCH (P < 0·001, Fisher's exact test)...
April 25, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28443609/the-hiv-1-viral-synapse-signals-human-foreskin-keratinocytes-to-secrete-thymic-stromal-lymphopoietin-facilitating-hiv-1-foreskin-entry
#5
Z Zhou, L Xu, A Sennepin, C Federici, Y Ganor, D Tudor, D Damotte, N Barry Delongchamps, M Zerbib, M Bomsel
The complexity of signal transduction resulting from the contact of human immunodeficiency virus type 1 (HIV-1)-infected cells and mucosal cells has hampered our comprehension of HIV-1 mucosal entry. Such process is driven efficiently only by viral synapse contacts, whereas cell-free HIV-1 remains poorly infectious. Using CD4(+) T-cells expressing only HIV-1 envelope inoculated on human adult foreskin tissues, we designed methodologies to identify the signals transduced in foreskin keratinocytes following HIV-1-envelope-dependent viral synapse formation...
April 26, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28442882/comparative-analysis-of-immunopathological-features-of-lichen-planopilaris-and-female-patients-with-frontal-fibrosing-alopecia
#6
Emanuella Rd Cerqueira, Neusa Valente, Mírian Nacagami Sotto, Ricardo Romiti
BACKGROUND: Frontal fibrosing alopecia (FFA) is a disorder characterized by progressive cicatricial alopecia (CA). Its classification as a clinical variant of lichen planopilaris (LPP) or as a unique disorder is controversial. The presence of Langerhans cells within the bulge area and the sebaceous epithelium and the presence of lymphocytic infiltrate in this area in CA have led to a series of hypotheses, although limited, about their development. To our knowledge, scarce is the literature demonstrating immunoanalytical studies comparing both disorders...
October 2016: International Journal of Trichology
https://www.readbyqxmd.com/read/28442470/late-outcomes-in-children-with-langerhans-cell-histiocytosis
#7
Tin Wai Chow, Wing Kwan Leung, Frankie Wai Tsoi Cheng, Shekhar Medhukar Kumta, Winnie Chiu Wing Chu, Vincent Lee, Matthew Ming Kong Shing, Chi Kong Li
INTRODUCTION: Langerhans cell histiocytosis (LCH) is a rare disease with diverse clinical courses. Despite improvement in survival outcomes in the recent decades, sequelae of the disease remain a concern. This study aimed to provide information on the long-term outcomes in patients with LCH, particularly on the sequelae and any associated factors. METHOD: Medical records of patients with diagnosis of LCH and being managed in our centre were retrospectively reviewed...
April 25, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28441413/langerhans-cells-prevent-subbasal-nerve-damage-and-upregulate-neurotrophic-factors-in-dry-eye-disease
#8
Eun Young Choi, Hyun Goo Kang, Chul Hee Lee, Areum Yeo, Hye Mi Noh, Nayeong Gu, Myoung Joon Kim, Jong Suk Song, Hyeon Chang Kim, Hyung Keun Lee
The functional role of Langerhans cells (LCs) in ocular surface inflammation and nerve damage in dry eye (DE) disease has yet to be determined. This study was performed to investigate this relationship through both clinical study on DE patients and in vivo mouse models with induced DE disease. In a cross-sectional case-control study (54 eyes of DE patients; 34 eyes of control patients), average cell density, area, and process length of LCs were measured using confocal microscopy. Data were analyzed to determine whether changes in LCs are correlated with subbasal nerve plexus (SNP) parameters (nerve density, beading, and tortuosity)...
2017: PloS One
https://www.readbyqxmd.com/read/28433429/immunological-function-of-langerhans-cells-in-hiv-infection
#9
Takamitsu Matsuzawa, Youichi Ogawa, Kohji Moriishi, Shinji Shimada, Tatsuyoshi Kawamura
BACKGROUND: Langerhans cells (LCs) are one of the initial target cells for HIV following sexual exposure and they are productively infected by HIV. HIV-infected LCs migrate to the draining lymph nodes (dLNs) and transmit the virus to CD4(+) T cells, leading to the dissemination of HIV. In contrast with the role of LCs in initial HIV acquisition, little is known about the modulation of immune responses by HIV-infected LCs. OBJECTIVE: We aimed to elucidate the induction of HIV-specific CD8(+) T cells and regulatory T cells (Tregs), both of which play important roles in regulating the progression of HIV infection...
April 9, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28432571/cell-therapy-for-type-1-diabetes-current-and-future-strategies
#10
REVIEW
Yasaman Aghazadeh, Maria Cristina Nostro
PURPOSE OF THE REVIEW: Type 1 diabetes (T1D) is defined by an autoimmune destruction of insulin producing β-cells located in the endocrine part of the pancreas, the islets of Langerhans. As exogenous insulin administration fails at preventing severe complications associated with this disease, cell replacement therapies are being considered as a means to treat T1D. The purpose of this manuscript is to review the challenges associated with current strategies and discuss the potential of stem cell therapy for the treatment of T1D...
June 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28430616/evaluation-of-pituitary-uptake-incidentally-identified-on-18f-fdg-pet-ct-scan
#11
Huijun Ju, Jinxin Zhou, Yu Pan, Jing Lv, Yifan Zhang
The clinical significance of pituitary uptake on routine whole body 18F-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...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28429464/inflammatory-features-of-frontal-fibrosing-alopecia
#12
Sophia A Ma, Sotonye Imadojemu, Kenneth Beer, John T Seykora
INTRODUCTION: Frontal fibrosing alopecia (FFA) is a cicatricial alopecia typically occurring in post-menopausal women. The etiology and pathophysiology of FFA is poorly understood but thought to be immune mediated. This study aims to further explore the extent of fibrosis and the inflammatory microenvironment by characterizing Langerhans cells (LCs), helper T cells, cytotoxic T cells, and B cells near hair follicles in FFA. METHODS: 11 paraffin-embedded tissues from patients with a clinical and histopathologic diagnosis of FFA were selected for immunohistochemical studies using CD3, CD4, CD8, CD1a, and CD20...
April 21, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28422066/diabetogenic-effects-of-ochratoxin-a-in-female-rats
#13
Firdevs Mor, Omur Sengul, Senay Topsakal, Mehmet Akif Kilic, Ozlem Ozmen
In this study, the diabetogenic effects of long term Ochratoxin A (OTA) administration in rats were investigated, and its role in the etiology of diabetes mellitus (DM) was examined utilizing 42 female Wistar rats for these purposes. The rats were divided into three different study and control groups according to the duration of the OTA administration. The rats received 45 μg OTA daily in their feed for 6, 9 and 24 weeks, respectively. Three control groups were also used for the same time periods. Blood and pancreatic tissue samples were collected during the necropsy at the end of the 6, 9 and 24 weeks...
April 19, 2017: Toxins
https://www.readbyqxmd.com/read/28421232/clinical-spectrum-quality-of-life-braf-mutation-status-and-treatment-of-skin-involvement-in-adult-langerhans-cell-histiocytosis
#14
Etienne Crickx, Jean-David Bouaziz, Gwenaël Lorillon, Mathilde de Menthon, Florence Cordoliani, Emmanuell Bugnet, Martine Bagot, Michel Rybojad, Samia Mourah, Abdellatif Tazi
Langerhans cell histiocytosis is a rare histiocytic disorder for which skin involvement and management are poorly described in adults. The aim of this retrospective monocentric study in a national reference centre is to describe the clinical characteristics, quality of life, BRAF mutation status and outcomes of skin involvement in adult patients with Langerhans cell histiocytosis. Twenty-five patients (14 females, mean age 47 years) were included, with a median follow-up of 33 months (range 4-420 months). Patients experienced poor dermatological quality of life despite low body surface involvement...
April 19, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28420858/transcriptional-regulation-of-pancreas-development-and-%C3%AE-cell-function-review
#15
Yoshio Fujitani
A small number of cells in the adult pancreas are endocrine cells. They are arranged in clusters called islets of Langerhans. The islets make insulin, glucagon, and other endocrine hormones, and release them into the blood circulation. These hormones help control the level of blood glucose. Therefore, a dysfunction of endocrine cells in the pancreas results in impaired glucose homeostasis, or diabetes mellitus. The pancreas is an organ that originates from the evaginations of pancreatic progenitor cells in the epithelium of the forgut endoderm...
April 14, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28417851/nuclear-medicine-techniques-in-pediatric-bone-imaging
#16
REVIEW
Laura A Drubach
An important mandate when imaging pediatric patients is the reduction of radiation exposure to the lowest possible level consistent with good quality diagnostic imaging, so individual selection of radiopharmaceutical dosage and imaging technique is essential. Although the logistics of image acquisition and the approach to interpretation mirror the more common use in adults, the challenges of imaging young children typically require greater attention to patient preparation, positioning, and supervision during imaging, with the use of parental or family engagement in the procedure, gentle restraint, and occasionally the need for sedation...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28413819/multisystemic-langerhans-cell-histiocytosis-in-an-adult
#17
Marie-Valerie Hegemann, Stephan Schreml
No abstract text is available yet for this article.
March 2017: JAAD Case Reports
https://www.readbyqxmd.com/read/28410606/in-vivo-quantification-of-quantum-dot-systemic-transport-in-c57bl-6-hairless-mice-following-skin-application-post-ultraviolet-radiation
#18
Samreen Jatana, Brian C Palmer, Sarah J Phelan, Robert Gelein, Lisa A DeLouise
BACKGROUND: Previous work has demonstrated size, surface charge and skin barrier dependent penetration of nanoparticles into the viable layers of mouse skin. The goal of this work was to characterize the tissue distribution and mechanism of transport of nanoparticles beyond skin, with and without Ultraviolet Radiation (UVR) induced skin barrier disruption. Atomic absorption spectroscopy (AAS), flow cytometry and confocal microscopy were used to examine the effect of UVR dose (180 and 360 mJ/cm(2) UVB) on the skin penetration and systemic distribution of quantum dot (QD) nanoparticles topically applied at different time-points post UVR using a hairless C57BL/6 mouse model...
April 14, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28410280/long-term-impacts-of-orthokeratology-treatment-on-sub-basal-nerve-plexus-and-corneal-sensitivity-responses-and-their-reversibility
#19
María Nombela-Palomo, Gema Felipe-Marquez, Miguel Angel Teus, Jose Luis Hernandez-Verdejo, Amelia Nieto-Bona
PURPOSE: To examine the effects of one year of overnight orthokeratology (OK) treatment on the sub-basal nerve plexus (SBNP) and corneal sensitivity and to assess the reversibility of these effects one month after treatment interruption. METHODS: Thirty-two subjects with low-moderate myopia underwent OK treatment for one year. Fifteen non-contact lens wearers served as controls. At the time points baseline, one year of treatment, and one month after removing the OK lenses, two tests were conducted: corneal sensitivity (Cochet-Bonnet esthesiometer) and SBNP imaging by in vivo confocal microscopy...
April 13, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28409826/glycogen-phosphorylase-inhibition-improves-%C3%AE-cell-function
#20
Lilla Nagy, Judit Márton, András Vida, Gréta Kis, Éva Bokor, Sándor Kun, Mónika Gönczi, Tibor Docsa, Attila Tóth, Miklós Antal, Pál Gergely, Balázs Csóka, Pal Pacher, László Somsák, Péter Bai
BACKGROUND AND PURPOSE: Glycogen phosphorylase (GP) is the key enzyme for glycogen degradation. GP inhibitors (GPi-s) are glucose lowering agents trapping glucose in the liver as glycogen. Glycogen metabolism has implications in β-cell function; glycogen degradation can maintain cellular glucose levels, which feeds into catabolism to maintain insulin secretion, and elevated glycogen degradation levels contribute to glucotoxicity. The purpose of this study was to assess whether influencing glycogen metabolism in β-cells by GPi-s impacts β-cell function...
April 13, 2017: British Journal of Pharmacology
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