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https://www.readbyqxmd.com/read/28819144/predicting-hair-cortisol-levels-with-hair-pigmentation-genes-a-possible-hair-pigmentation-bias
#1
Alexander Neumann, Gerard Noppe, Fan Liu, Manfred Kayser, Frank C Verhulst, Vincent W V Jaddoe, Elisabeth F C van Rossum, Henning Tiemeier
Cortisol concentrations in hair are used to create hormone profiles spanning months. This method allows assessment of chronic cortisol exposure, but might be biased by hair pigmentation: dark hair was previously related to higher concentrations. It is unclear whether this association arises from local effects, such as increased hormone extractability, or whether the association represents systemic differences arising from population stratification. We tested the hypothesis that hair pigmentation gene variants are associated with varying cortisol levels independent of genetic ancestry...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759642/distinctive-actions-of-connexin-46-and-connexin-50-in-anterior-pituitary-folliculostellate-cells
#2
María Leiza Vitale, Christopher J Garcia, Casimir D Akpovi, R-Marc Pelletier
Folliculostellate cell gap junctions establish a network for the transmission of information within the anterior pituitary. Connexins make up gap junction channels. Changes in connexin (Cx) turnover modify gap junction-mediated intercellular communication. We have reported that cytokines and hormones influence Cx43 turnover and coupling in folliculostellate cells and in the folliculostellate cell line TtT/GF. In addition, the expression of different connexins alters intercellular communication and connexins may have functions besides cell coupling...
2017: PloS One
https://www.readbyqxmd.com/read/28715822/long-term-cortisol-concentration-in-scalp-hair-of-asthmatic-children-using-inhaled-corticosteroids-a-case-control-study
#3
Maaike P Smit, Ed H G van Leer, Gerard Noppe, Yolanda B de Rijke, Dieneke Kramer van Driel, Erica L T van den Akker
INTRODUCTION: Inhaled corticosteroids (ICS) can interfere with the hypothalamic-pituitary-adrenal (HPA) axis and may lead to adrenal insufficiency, resulting in a decrease of cortisol production. Cortisol levels measured in scalp hair provide a marker for long-term cortisol exposure. Data regarding hair cortisol concentration (HCC) in asthmatic children with ICS therapy are scarce. The aim of this study is to compare HCC in asthmatic children under ICS treatment with a healthy control group...
July 14, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28655384/altered-basophil-function-in-patients-with-chronic-kidney-disease-on-hemodialysis%C3%A2
#4
Zenib Aljadi, Anna Nopp, Ola Winqvist, Aman Russom, Britta Hylander, Stefan Jacobson, Joachim Lundahl
AIMS: Chronic kidney disease (CKD) leads to impairment of immune cell function. Given the potential role of basophils in the pathogenesis of CKD, we aimed to study the basophil responsiveness towards microbial antigen exposure, judged as adhesion molecule expression and degranulation, in CKD patients on hemodialysis. MATERIALS AND METHODS: We selected markers linked to two crucial biological phases: the transmigration and degranulation processes, respectively. For the transmigration process, we selected the adhesion molecules CD11b, active CD11b epitope, and CD62L and for the degranulation process CD203c (piecemeal degranulation marker), CD63 (degranulation marker), and CD300a (inhibitory marker of degranulation)...
June 28, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28621751/geographic-variations-in-cardiometabolic-risk-factors-in-luxembourg
#5
Ala'a Alkerwi, Illiasse El Bahi, Saverio Stranges, Jean Beissel, Charles Delagardelle, Stephanie Noppe, Ngianga-Bakwin Kandala
Cardiovascular disease (CVD) and associated behavioural and metabolic risk factors constitute a major public health concern at a global level. Many reports worldwide have documented different risk profiles for populations with demographic variations. The objective of this study was to examine geographic variations in the top leading cardio metabolic and behavioural risk factors in Luxembourg, in order to provide an overall picture of CVD burden across the country. The analysis conducted was based on data from the nationwide ORISCAV-LUX survey, including 1432 subjects, aged 18-69 years...
June 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28470771/development-and-screening-of-epoxy-spacer-phage-cryogels-for-affinity-chromatography-enhancing-the-binding-capacity
#6
Wim Noppe, Hans Deckmyn
Macroporous epoxy cryogels can be used as an alternative for classical matrices in affinity chromatography. Due to the structural properties of cryogels, with pores of up to 100 μm, crude samples can be processed at high speed without previous manipulations such as clarification or centrifugation. Also, we previously used a peptide-expressing M13 bacteriophage as an affinity ligand. These ligands show high specificity toward the target to be purified. Combination of both, leads to a relative cost-effective one-step chromatographic set-up delivering a high purity sample (>95%), however, so far with limited capacity...
May 4, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28380480/hemodialysis-patients-display-a-declined-proportion-of-th2-and-regulatory-t-cells-in-parallel-with-a-high-interferon-%C3%AE-profile
#7
Ladan Mansouri, Anna Nopp, Stefan H Jacobson, Britta Hylander, Joachim Lundahl
BACKGROUND: A high prevalence of cardiovascular diseases (CVDs) and infections in patients with chronic kidney disease (CKD) arises partly due to a high inflammatory state and aberrations in immune cells function. Following in vitro stimulation of leukocytes with different T-cell mitogens, we observed a lower level of interleukin (IL)-2 and IL-10 production in CKD patients. To gain more knowledge as to whether this is the result of an alteration in T-cell function, we investigated the T-cell subsets profile and cytokine production in hemodialysis patients...
2017: Nephron
https://www.readbyqxmd.com/read/28295227/mild-perinatal-adversities-moderate-the-association-between-maternal-harsh-parenting-and-hair-cortisol-evidence-for-differential-susceptibility
#8
Dafna A Windhorst, Ralph C A Rippe, Viara R Mileva-Seitz, Frank C Verhulst, Vincent W V Jaddoe, Gerard Noppe, Elisabeth F C van Rossum, Erica L T van den Akker, Henning Tiemeier, Marinus H van IJzendoorn, Marian J Bakermans-Kranenburg
It has been shown that following exposure to mild perinatal adversity, children have greater susceptibility to both the negative and positive aspects of their subsequent environment. In a large population-based cohort study (N = 1,776), we investigated whether mild perinatal adversity moderated the association between maternal harsh parenting and children's hair cortisol levels, a biomarker of chronic stress. Mild perinatal adversity was defined as late preterm birth (gestational age at birth of 34-37 weeks, 6 days) or small for gestational age (birth weight between the 2...
April 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/28288364/hair-analysis-reveals-subtle-hpa-axis-suppression-associated-with-use-of-local-corticosteroids-the-lifelines-cohort-study
#9
Vincent L Wester, Gerard Noppe, Mesut Savas, Erica L T van den Akker, Yolanda B de Rijke, Elisabeth F C van Rossum
BACKGROUND AND AIMS: Scalp hair is increasingly used to measure the long-term exposure to endogenous glucocorticoids hormones. Long-term cortisone (HairE) and cortisol (HairF) have been associated with obesity, metabolic syndrome, cardiovascular disease and psychopathology. However, little is known about the influence of the use of local corticosteroids and major stressful life events on hair glucocorticoids. MATERIALS AND METHODS: We determined HairE and HairF using liquid chromatography - tandem mass spectrometry in 295 adult participants of the population-based Lifelines cohort study (75% females, median age 42)...
June 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28275203/anaphylactic-reactions-to-novel-foods-case-report-of-a-child-with-severe-crocodile-meat-allergy
#10
Natalia Ballardini, Anna Nopp, Carl Hamsten, Mirja Vetander, Erik Melén, Caroline Nilsson, Markus Ollert, Carsten Flohr, Annette Kuehn, Marianne van Hage
Availability of "exotic" foods is steadily increasing. In this report, we describe the first case of anaphylaxis to crocodile meat. The patient was a 13-year-old boy with severe immunoglobulin E-mediated allergy to chicken meat. When tasting crocodile meat for the first time, he developed an anaphylactic reaction. Cross-reactivity between chicken and crocodile meat was suspected to have triggered this reaction. Basophil activation and immunoglobulin E testing confirmed the boy's allergic reaction to crocodile meat proteins...
April 2017: Pediatrics
https://www.readbyqxmd.com/read/28177334/development-of-a-novel-italian-speech-in-noise-test-using-a-roving-level-adaptive-method-adult-population-based-normative-data
#11
P Canzi, M Manfrin, G Locatelli, P Nopp, M Perotti, M Benazzo
In recent years the increasing development of hearing devices has led to a critical analysis of the standard methods employed to evaluate hearing function. Being too far from reality, conventional investigation of hearing loss based on pure-tone threshold audiometry and on mono/disyllabic word lists, presented in quiet conditions, has been shown to be inadequate. A speech-in-noise test using a roving-level adaptive method employs target and competing signals varying in level in order to reproduce everyday life speaking conditions and explore a more complete sound range...
December 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27986730/the-sinorhizobium-ensifer-fredii-hh103-nodulation-outer-protein-nopi-is-a-determinant-for-efficient-nodulation-of-soybean-and-cowpea-plants
#12
Irene Jiménez-Guerrero, Francisco Pérez-Montaño, Carlos Medina, Francisco Javier Ollero, Francisco Javier López-Baena
The type III secretion system (T3SS) is a specialized secretion apparatus that is commonly used by many plant and animal pathogenic bacteria to deliver proteins, termed effectors, to the interior of the host cells. These effectors suppress host defenses and interfere with signal transduction pathways to promote infection. Some rhizobial strains possess a functional T3SS, which is involved in the suppression of host defense responses, host range determination, and symbiotic efficiency. The analysis of the genome of the broad-host-range rhizobial strain Sinorhizobium fredii HH103 identified eight genes that code for putative T3SS effectors...
March 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27883239/individually-dosed-omalizumab-an-effective-treatment-for-severe-peanut-allergy
#13
J Brandström, M Vetander, G Lilja, S G O Johansson, A-C Sundqvist, F Kalm, C Nilsson, A Nopp
BACKGROUND: Treatment with omalizumab has shown a positive effect on food allergies, but no dosages are established. Basophil allergen threshold sensitivity (CD-sens) can be used to objectively measure omalizumab treatment efficacy and correlates with the outcome of double-blind placebo-controlled food challenge to peanut. OBJECTIVE: To evaluate whether individualized omalizumab treatment monitored by CD-sens could be an effective intervention for suppression of allergic reactions to peanut...
April 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27605701/contact-inhibition-of-locomotion-and-mechanical-cross-talk-between-cell-cell-and-cell-substrate-adhesion-determine-the-pattern-of-junctional-tension-in-epithelial-cell-aggregates
#14
Luke Coburn, Hender Lopez, Benjamin J Caldwell, Elliott Moussa, Chloe Yap, Rashmi Priya, Adrian Noppe, Anthony P Roberts, Vladimir Lobaskin, Alpha S Yap, Zoltan Neufeld, Guillermo A Gomez
We used a computational approach to analyze the biomechanics of epithelial cell aggregates-islands, stripes, or entire monolayers-that combines both vertex and contact-inhibition-of-locomotion models to include cell-cell and cell-substrate adhesion. Examination of the distribution of cell protrusions (adhesion to the substrate) in the model predicted high-order profiles of cell organization that agree with those previously seen experimentally. Cells acquired an asymmetric distribution of basal protrusions, traction forces, and apical aspect ratios that decreased when moving from the edge to the island center...
November 7, 2016: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/27598456/no-association-between-hair-cortisol-or-cortisone-and-brain-morphology-in-children
#15
Ruoqing Chen, Ryan L Muetzel, Hanan El Marroun, Gerard Noppe, Elisabeth F C van Rossum, Vincent W Jaddoe, Frank C Verhulst, Tonya White, Fang Fang, Henning Tiemeier
Little is known about the relationship between the long-term hypothalamic-pituitary-adrenal (HPA) axis functioning and brain structure in children. Glucocorticoid in hair has emerged as an important biomarker of HPA activity. In this study, we investigated the associations of hair cortisol and cortisone concentrations with brain morphology in young children. We included 219 children aged 6-10 years from the Generation R Study in Rotterdam, the Netherlands. We examined cortisol and cortisone concentrations by hair analysis using liquid chromatography-tandem mass spectrometry, and assessed brain morphometric measures with structural magnetic resonance imaging...
December 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27411319/pros-and-cons-of-clinical-basophil-testing-bat
#16
REVIEW
Hans Jürgen Hoffmann, Edward F Knol, Martha Ferrer, Lina Mayorga, Vito Sabato, Alexandra F Santos, Bernadette Eberlein, Anna Nopp, Donald MacGlashan
PURPOSE OF REVIEW: We review basophil testing by flow cytometry with an emphasis on advantages and disadvantages. RECENT FINDINGS: There are many tools available to assess the presence and severity of allergic diseases in patients. For 50 years, peripheral blood basophils have been used as tools to study these diseases. It is a very accessible cell that binds IgE antibody and secretes the classical mediators responsible for the symptoms of allergic reactions. In the last decade, an even more accessible methodology, using flow cytometry, has been developed to enhance the ability to use basophils for both mechanistic and clinical diagnostics...
July 2016: Current Allergy and Asthma Reports
https://www.readbyqxmd.com/read/27351351/is-poor-neonatal-adaptation-after-exposure-to-antidepressant-medication-related-to-fetal-cortisol-levels-an-explorative-study
#17
Noera Kieviet, Silke de Groot, Gerard Noppe, Yolanda B de Rijke, Elisabeth F C van Rossum, Erica L T van den Akker, Koert M Dolman, Adriaan Honig
BACKGROUND: As a marker for poor neonatal adaptation (PNA) is lacking, the diagnostic process is difficult and includes invasive additional testing. AIMS: In order to develop a marker, it is essential to gain insight into the etiology of PNA. We hypothesized that the fetal cortisol level may play a role in this etiology. STUDY DESIGN: Non-randomized, prospective controlled study. OUTCOME MEASURES: We examined hair cortisol levels of infants exposed and not exposed to selective antidepressants (SADs) during pregnancy...
July 2016: Early Human Development
https://www.readbyqxmd.com/read/27339603/long-term-glucocorticoid-concentrations-as-a-risk-factor-for-childhood-obesity-and-adverse-body-fat-distribution
#18
G Noppe, E L T van den Akker, Y B de Rijke, J W Koper, V W Jaddoe, E F C van Rossum
BACKGROUND: Childhood obesity is an important risk factor for premature development of the metabolic syndrome (MetS) at adulthood. There is need for understanding of the mechanisms underlying the MetS and obesity. Patients with Cushing's disease suffer from similar metabolic complications, leading to the hypothesis that inter-individual cortisol variation may contribute to the onset of obesity. In addition, glucocorticoid receptor (GR)-gene polymorphisms resulting in differential glucocorticoid (GC) sensitivity, have been associated with an adverse metabolic profile...
July 26, 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27192166/college-and-the-grieving-student-a-mixed-methods-analysis
#19
Illene Noppe Cupit, Heather L Servaty-Seib, Sara Tedrick Parikh, Andrea C Walker, Ryan Martin
The current mixed-methods study examines how college students negotiate the grief process with the competing demands of college. Data were collected from 950 students at a regional comprehensive university and a research intensive institution. Quantitative findings revealed closeness to the deceased as a key positive predictor of mental health and academic difficulties and positive associations between changes in peer relationships and mental health difficulties. Qualitative findings showed that closeness to the deceased was associated with a greater sense of purpose in the college experience and findings suggested that institutions and their faculty encourage and exhibit more sensitivity about grief issues...
September 2016: Death Studies
https://www.readbyqxmd.com/read/27061431/scalp-hair-17-hydroxyprogesterone-and-androstenedione-as-a-long-term-therapy-monitoring-tool-in-congenital-adrenal-hyperplasia
#20
Gerard Noppe, Yolanda B de Rijke, Jan W Koper, Elisabeth F C van Rossum, Erica L T van den Akker
BACKGROUND: Glucocorticoid replacement therapy in congenital adrenal hyperplasia (CAH) is challenging, especially in children, because both over- and under-dosing may have profound and long-lasting adverse effects. Clinical follow-up parameters are largely nonspecific and slow to develop. Steroid concentrations in scalp hair may be a useful monitoring tool, as it provides information on both long-term steroid precursor and glucocorticoid exposure. AIM: We aimed to evaluate scalp hair steroid precursor concentrations as a monitoring tool for treatment follow-up in children with CAH...
October 2016: Clinical Endocrinology
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