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https://www.readbyqxmd.com/read/29134656/long-term-dynamic-synaptic-reorganization-after-gabaergic-precursor-cell-transplantation-into-adult-mouse-spinal-cord
#1
Ida J Llewellyn-Smith, Allan I Basbaum, João M Bráz
Transplanting embryonic precursors of GABAergic neurons from the medial ganglionic eminence (MGE) into adult mouse spinal cord ameliorates mechanical and thermal hypersensitivity in peripheral nerve injury models of neuropathic pain. Although Fos and transneuronal tracing studies strongly suggest that integration of MGE-derived neurons into host spinal cord circuits underlies recovery of function, the extent to which there is synaptic integration of the transplanted cells has not been established. Here, we used electron microscopic immunocytochemistry to assess directly integration of GFP-expressing MGE-derived neuronal precursors into dorsal horn circuitry in intact, adult mice with short- (5-6 weeks) or long-term (4-6 months) transplants...
November 13, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29101366/identification-of-an-analgesic-lipopeptide-produced-by-the-probiotic-escherichia-coli-strain-nissle-1917
#2
Teresa Pérez-Berezo, Julien Pujo, Patricia Martin, Pauline Le Faouder, Jean-Marie Galano, Alexandre Guy, Claude Knauf, Jean Claude Tabet, Sophie Tronnet, Frederick Barreau, Maud Heuillet, Gilles Dietrich, Justine Bertrand-Michel, Thierry Durand, Eric Oswald, Nicolas Cenac
Administration of the probiotic Escherichia coli strain Nissle 1917 (EcN) decreases visceral pain associated with irritable bowel syndrome. Mutation of clbA, a gene involved in the biosynthesis of secondary metabolites, including colibactin, was previously shown to abrogate EcN probiotic activity. Here, we show that EcN, but not an isogenic clbA mutant, produces an analgesic lipopeptide. We characterize lipoamino acids and lipopeptides produced by EcN but not by the mutant by online liquid chromatography mass spectrometry...
November 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/29100039/xrcc1-mediated-repair-of-strand-breaks-independent-of-pnkp-binding
#3
Julie K Horton, Donna F Stefanick, Ming-Lang Zhao, Agnes K Janoshazi, Natalie R Gassman, Hannah J Seddon, Samuel H Wilson
Repair of DNA-protein crosslinks and oxidatively damaged DNA base lesions generates intermediates with nicks or gaps with abnormal and blocked 3'-phosphate and 5'-OH ends that prevent the activity of DNA polymerases and ligases. End cleaning in mammalian cells by Tdp1 and PNKP produces the conventional 3'-OH and 5'-phosphate DNA ends suitable for completion of repair. This repair function of PNKP is facilitated by its binding to the scaffold protein XRCC1, and phosphorylation of XRCC1 by CK2 at several consensus sites enables PNKP binding and recruitment to DNA damage...
October 19, 2017: DNA Repair
https://www.readbyqxmd.com/read/29092096/retrospective-study-of-hypersensitivity-reactions-to-chemotherapeutic-agents-in-a-thoracic-oncology-service
#4
H Capelle, C Tummino, L Greillier, M Gouitaa, J Birnbaum, N Ausias, F Barlesi, M Montana
WHAT IS KNOWN AND OBJECTIVE: With the increasing use of cancer chemotherapy agents, hypersensitivity reactions are commonly encountered. The allergic clinical symptoms are variable and unpredictable. The aim of this study was to identify the characteristics of hypersensitivity reactions and to assess the value of skin tests for platinum salts and pemetrexed in the treatment of patients with non-small cell lung cancers or malignant pleural mesothelioma. METHODS: A single-centre retrospective study was performed for 2 years...
November 1, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/29083340/nab-paclitaxel-after-docetaxel-hypersensitivity-reaction-case-report-and-literature-review
#5
Benedetta Pellegrino, Daniela Boggiani, Chiara Tommasi, Dante Palli, Antonino Musolino
Taxanes, including paclitaxel and docetaxel, are one of the most active cytotoxic agents in breast cancer  treatment  including  Her-2  positive  subtype characterized  by  aggressive  clinical  and pathological features since the early stage. However, their use is sometimes limited by the occurrence of hypersensivity reactions (HSRs) characterized by erythematous rashes, bronchospasm, respiratory distress, hypotension, and pulmonary edema. Cross-reactions between paclitaxel and docetaxel are described in literature with a rate ranging from 49% to 90%...
October 23, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29082431/metabolically-healthy-unhealthy-components-may-modify-bone-mineral-density-in-obese-people
#6
Atieh Mirzababaei, Khadijeh Mirzaei, Leila Khorrami-Nezhad, Zhila Maghbooli, Seyed Ali Keshavarz
Link between obesity and bone health is controversial. It seems that maybe the difference in metabolic status leads to this difference. We studied relation between metabolically healthy/unhealthy components with bone mineral density. Results showed metabolically unhealthy obesity (MUHO) phenotypes have better bone status at hip site than metabolically healthy obesity (MHO). Also, component metabolic can effect on BMD in different sites. PURPOSE/INTRODUCTION: This cross-sectional study aimed to compare total BMD and L-L4 BMD in MHO and MUHO base on Karelis criteria...
October 29, 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/29051491/fan1-interaction-with-ubiquitylated-pcna-alleviates-replication-stress-and-preserves-genomic-integrity-independently-of-brca2
#7
Antonio Porro, Matteo Berti, Julia Pizzolato, Serena Bologna, Svenja Kaden, Anja Saxer, Yue Ma, Kazuo Nagasawa, Alessandro A Sartori, Josef Jiricny
Interstrand cross-link (ICL) hypersensitivity is a characteristic trait of Fanconi anemia (FA). Although FANCD2-associated nuclease 1 (FAN1) contributes to ICL repair, FAN1 mutations predispose to karyomegalic interstitial nephritis (KIN) and cancer rather than to FA. Thus, the biological role of FAN1 remains unclear. Because fork stalling in FAN1-deficient cells causes chromosomal instability, we reasoned that the key function of FAN1 might lie in the processing of halted replication forks. Here, we show that FAN1 contains a previously-uncharacterized PCNA interacting peptide (PIP) motif that, together with its ubiquitin-binding zinc finger (UBZ) domain, helps recruit FAN1 to ubiquitylated PCNA accumulated at stalled forks...
October 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29045819/disruption-of-the-epidermal-barrier-induces-regulatory-t-cells-via-il-33-in-mice
#8
Anika Bruhs, Ehrhardt Proksch, Thomas Schwarz, Agatha Schwarz
Disturbance of the epidermal barrier by UV radiation (UVR) is associated with the release of antimicrobial peptides and inflammatory cytokines for the purpose of a danger response. On the other hand, UVR causes immunosuppression via regulatory T cells (Treg) which limit the inflammatory reaction. The concurrent induction of antimicrobial peptides and Treg by UVR may represent a counter-regulatory mechanism in response to barrier disruption, preventing microbial superinfection and sensitization to contact allergens, respectively, both of which cross impaired epidermis more easily...
October 15, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29045131/dapsone-and-nitroso-dapsone-activation-of-na%C3%A3-ve-t-cells-from-healthy-donors
#9
Abdulaziz Alzahrani, Monday O Ogese, Xioali Meng, James Waddington, Arun Tailor, John Farrell, James L Maggs, Catherine J Betts, B Kevin Park, Dean John Naisbitt
Dapsone (DDS) causes hypersensitivity reactions in 0.5-3.6% of patients. Although clinical diagnosis is indicative of a hypersensitivity reaction, studies have not been performed to define whether dapsone or a metabolite activates specific T-cells. Thus, the aims of this study were to explore the immunogenicity DDS and nitroso DDS (DDS-NO) using PBMC from healthy donors and splenocytes from mice and generate human T-cell clones to characterize mechanisms of T-cell activation. DDS-NO was synthesized from DDS-hydroxylamine and shown to bind to the thiol group of glutathione and human and mouse albumin through sulfonamide and N-hydroxyl sulphonamide adducts...
October 18, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29027520/further-evidence-associating-igg1-but-not-igg2-with-susceptibility-to-canine-visceral-leishmaniasis-caused-by-leishmania-l-infantum-chagasi-infection
#10
Luciana Vieira do R Lima, Liliane Almeida Carneiro, Marliane Batista Campos, Thiago Vasconcelos Dos Santos, Patrícia Karla Ramos, Márcia Dalastra Laurenti, Claudio Eduardo C Teixeira, Fernando T Silveira
We present here a cross-sectional study analyzing the IgG1 and IgG2 immune responses to natural canine Leishmania (L.) infantum chagasi-infection and their relationships with delayed-type hypersensitivity (DTH) in 50 mongrel dogs with previous positive serodiagnoses (IFAT-IgG) (56% with subclinical status [= apparently healthy] and 44% clinically sick), living in endemic areas for visceral leishmaniasis in the Brazilian Amazon. IgG1 and IgG2 responses were measured using commercial polyclonal antibodies in ELISA, while DTH was elicited by intradermal skin test using cultured promastigotes L...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/29022941/genome-wide-mapping-of-dnase-i-hypersensitive-sites-in-rare-cell-populations-using-single-cell-dnase-sequencing
#11
James Cooper, Yi Ding, Jiuzhou Song, Keji Zhao
Increased chromatin accessibility is a feature of cell-type-specific cis-regulatory elements; therefore, mapping of DNase I hypersensitive sites (DHSs) enables the detection of active regulatory elements of transcription, including promoters, enhancers, insulators and locus-control regions. Single-cell DNase sequencing (scDNase-seq) is a method of detecting genome-wide DHSs when starting with either single cells or <1,000 cells from primary cell sources. This technique enables genome-wide mapping of hypersensitive sites in a wide range of cell populations that cannot be analyzed using conventional DNase I sequencing because of the requirement for millions of starting cells...
November 2017: Nature Protocols
https://www.readbyqxmd.com/read/29017901/immediate-reactions-to-iodinated-contrast-media
#12
Cristina Morales-Cabeza, Dasha Roa-Medellín, Inés Torrado, Manuel De Barrio, Carmen Fernández-Álvarez, Juan Francisco Montes-Aceñero, Inmaculada De La Riva, Alicia Prieto-García
BACKGROUND: Immediate hypersensitivity reactions (IHRs) to iodinated contrast media (ICMs) remain a common clinical concern. Positive skin test and basophil activation test results suggest a specific IgE-mediated mechanism in some cases. Skin test and controlled challenge test (CCT) are useful to manage these patients. OBJECTIVE: To study clinical and allergologic features of IHRs to ICMs in a Spanish tertiary hospital during a 7-year period. METHODS: Demographic and clinical data concerning the reaction were recorded...
October 7, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29017833/cross-reactivity-in-%C3%AE-lactam-allergy
#13
Robert J Zagursky, Michael E Pichichero
β-Lactam drugs (penicillins, amoxicillin, and cephalosporins) account for 42.6% of all severe drug-induced anaphylaxis. In this review, we focus on clinically significant immunologic cross-reactivity in patients with confirmed penicillin allergy to cephalosporins, and the structural involvement of the R1 and R2 chemical side chains of the cephalosporins causing IgE-mediated cross-reactivity with penicillin and other cephalosporins. Skin tests predict IgE-mediated reactions and showed cross-reactivity between penicillins and early generation cephalosporins that shared side chains, but confirmatory challenge data are lacking...
October 7, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29017774/an-alternative-biomarker-based-approach-for-the-prediction-of-proteins-known-to-sensitize-the-respiratory-tract
#14
Kathrin S Zeller, Henrik Johansson, Trine Østergaard Lund, Nanna N Kristensen, Erwin L Roggen, Malin Lindstedt
Many natural and industrial proteins are known to have properties that can result in type I hypersensitivity, however, to date, no validated test system exists that can predict the sensitizing potential of these allergens. Thus, the objective of this study was to develop a protocol based on the myeloid cell-based Genomic Allergen Rapid Detection (GARD) assay that can be used to assess and predict the capacity of protein allergens known to induce sensitization in the respiratory tract. Cellular responses induced by eight selected proteins were assessed using transcriptional profiling, flow cytometry and multiplex cytokine analysis...
October 7, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28986120/acetyl-salicylic-acid-challenge-in-children-with-hypersensitivity-reactions-to-nonsteroidal-anti-inflammatory-drugs-differentiates-between-cross-intolerant-and-selective-responders
#15
Natalia Blanca-López, Elisa Haroun-Diaz, Francisco Javier Ruano, Diana Pérez-Alzate, María Luisa Somoza, María Vázquez de la Torre Gaspar, Francisco Rivas-Ruiz, Elena García-Martin, Miguel Blanca, Gabriela Canto
BACKGROUND: Hypersensitivity reactions to nonsteroidal anti-inflammatory drugs (NSAIDs) in children are becoming a great concern. Most studies have focused on adults, with noted discrepancies observed in the classification of hypersensitivity reactions to NSAIDs in children when compared with adults. OBJECTIVE: To phenotype a group of children with hypersensitivity reactions to NSAIDs, including paracetamol, and analyze the degree of agreement with the entities reported in adults and how they fit the proposed classifications...
October 3, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28977756/hypersensitivity-reactions-to-lmwhs-different-patterns-of-cross-reactivity-in-three-patients-case-series-and-a-literature-review
#16
Danica Juricic Nahal, Ivana Cegec, Viktorija Erdeljic Turk, Ksenija Makar Ausperger, Iva Kraljickovic, Iveta Simic
Low molecular weight heparins (LMWH) are used for a variety of indications. The most common type of hypersensitivity reactions to LMWHs are delayed-type hypersensitivity reactions (DHR). Immediate-type hypersensitivity reactions (IHR) occur only sporadically. Cross-reactivity of different LMWHs is a common and unpredictable problem. We present two cases of patients who developed DHR to nadroparin and enoxaparin, respectively. The third case presents a patient who developed IHR to nadroparin. Skin tests confirmed the hypersensitivity in all cases...
October 4, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28977288/tests-to-assess-sensitization-to-aspergillus-fumigatus-in-cystic-fibrosis
#17
Simone Santana Aguiar, Neiva Damaceno, Wilma Carvalho Neves Forte
OBJECTIVE: To evaluate the results of the tests used to identify the IgE mediated sensitization to Aspergillus fumigatus in patients with cystic fibrosis. METHODS: This is a cross-sectional descriptive study with a convenience sample of 86 patients diagnosed with cystic fibrosis in the Reference Service in Cystic Fibrosis at a tertiary teaching hospital. The following tests were performed to assess the sensitization to A. fumigatus in patients with cystic fibrosis: Total serum IgE, eosinophil count, fungus detection through oropharyngeal swab or sputum culture, serum-specific IgE, and immediate-type hypersensitivity (IgE) skin tests...
July 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/28965632/penicillin-and-beta-lactam-hypersensitivity
#18
REVIEW
Daniel Har, Roland Solensky
Ten percent of patients report penicillin allergy, but more than 90% of these individuals can tolerate penicillins. Skin testing remains the optimal method for evaluation of possible IgE-mediated penicillin allergy and is recommended by professional societies, as the harms for alternative antibiotics include antimicrobial resistance, prolonged hospitalizations, readmissions, and increased costs. Removal of penicillin allergy leads to decreased utilization of broad-spectrum antibiotics, such as fluoroquinolones and vancomycin...
November 2017: Immunology and Allergy Clinics of North America
https://www.readbyqxmd.com/read/28923488/diagnostic-value-of-oral-challenge-testing-in-the-diagnosis-of-macrolide-hypersensitivity
#19
Derya Ünal, Semra Demir, Aslı Gelincik, Müge Olgaç, Raif Coşkun, Bahattin Çolakoğlu, Suna Büyüköztürk
BACKGROUND: Hypersensitivity reactions (HRs) to macrolides are rare. OBJECTIVE: The aim of this study was to evaluate the diagnostic value of in vivo tests in the diagnosis of HRs to macrolides and also to assess cross-reactivity between 4 different macrolides (clarithromycin, dirithromycin, spiramycin, and azithromycin) belonging to 3 different groups. METHODS: Twenty-five patients with a history of immediate or delayed-type HRs to at least 1 macrolide and 20 healthy control subjects underwent skin testing for both the culprit and alternative macrolides...
September 8, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28919435/ultrasensitive-and-rapid-immuno-detection-of-human-ige-anti-therapeutic-horse-sera-using-an-electrochemical-immunosensor
#20
Isis C Prado, André L A Souza, David W Provance-Jr, Ricardo J Cassella, Salvatore G De-Simone
Antivenom allergy disease mediated by patient IgE is an important public health care concern. To improve detection of hypersensitive individuals prior to passive antibody therapy, an amperometric immunosensor was developed to detect reactive human IgE. Whole horse IgG3 (hoIgG3) was immobilized onto the surface of carbon or gold screen-printed electrodes through a cross-linking solution of glutaraldehyde on a chitosan film. Sera from persons with a known allergic response to hoIgG3 or non-allergic individuals was applied to the sensor...
September 14, 2017: Analytical Biochemistry
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