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1.
Oxf Med Case Reports ; 2024(6): omae056, 2024 Jun.
Article de Anglais | MEDLINE | ID: mdl-38860016

RÉSUMÉ

We present the case of a 27-year-old pregnant woman, newly diagnosed with Systemic Lupus Erythematosus (SLE) during pregnancy. The patient delivered a newborn at 38 weeks gestation, who, on the first day of life, manifested complete heart block. This case underscores the clinical challenges associated with neonatal lupus, emphasizing the need for collaborative, multidisciplinary management.

2.
Prostaglandins Other Lipid Mediat ; 165: 106715, 2023 04.
Article de Anglais | MEDLINE | ID: mdl-36758722

RÉSUMÉ

BACKGROUND: Cytochrome 4F2 (CYP4F2) is a major arachidonic acid-metabolizing enzyme which produces 20-Hydroxyeicosatetraenoic acid (20-HETE). It is found that 20-HETE is involved in the pathophysiology of many diseases, including diabetes mellitus. The genetic variants of CYP4F2 can affect its enzymatic activity as well as the 20-HETE production. AIMS: Our aim with this paper was to find out the genotype frequency of CYP4F2 rs2108622 C>T, the major functional variant in the CYP4F2 gene, among a sample of type II diabetes (TIIDM) and its effects on diabetes complications and lipid profile. METHODS: The CYP4F2 rs2108622 variant was genotyped among 90 healthy volunteers and 90 TIIDM patients that attending the University of Jordan Hospital, using the DNA Sanger sequencing method. The data of lipid profile and diabetes complications were obtained from the electronic records available in the hospital. RESULTS: We found that the frequency of CYP4F2 rs2108622C>T variant is significantly (P = 0.02) lower among TIIDM patients in comparison to healthy subjects using both co-dominant and dominant genotyping models. In addition, the CYP4F2 rs2108622 T/T genotype was significantly (P = 0.02) more frequent among TIIDM patients with retinopathy complications (OR=4.36, CI: 1.32-14.37). Lastly, the CYP4F2 rs2108622C>T variant was not associated (P > 0.05) with the glycaemic and lipid profile of patients. CONCLUSIONS: It can be concluded from this study that the frequency of CYP4F2 rs2108622 T/T genotype is lower among TIIDM, but this genotype is associated with an increased risk of retinopathy complications in patients of Jordanian origin. Further studies with a larger sample size are needed to validate the findings of this study.


Sujet(s)
Cytochrome P-450 enzyme system , Diabète de type 2 , Humains , Cytochrome P-450 enzyme system/génétique , Famille-4 de cytochromes P450 , Jordanie/épidémiologie , Projets pilotes , Diabète de type 2/complications , Diabète de type 2/génétique , Génotype , Lipides , Polymorphisme de nucléotide simple/génétique
3.
Antibiotics (Basel) ; 11(12)2022 Dec 02.
Article de Anglais | MEDLINE | ID: mdl-36551400

RÉSUMÉ

Infectious diseases caused by various nosocomial microorganisms affect worldwide both immunocompromised and relatively healthy persons. Bacteria and fungi have different tools to evade antimicrobials, such as hydrolysis damaging the drug, efflux systems, and the formation of biofilm that significantly complicates the treatment of the infection. Here, we show that myrtenol potentiates the antimicrobial and biofilm-preventing activity of conventional drugs against S. aureus and C. albicans mono- and dual-species cultures. In our study, the two optical isomers, (-)-myrtenol and (+)-myrtenol, have been tested as either antibacterials, antifungals, or enhancers of conventional drugs. (+)-Myrtenol demonstrated a synergistic effect with amikacin, fluconazole, and benzalkonium chloride on 64-81% of the clinical isolates of S. aureus and C. albicans, including MRSA and fluconazole-resistant fungi, while (-)-myrtenol increased the properties of amikacin and fluconazole to repress biofilm formation in half of the S. aureus and C. albicans isolates. Furthermore, myrtenol was able to potentiate benzalkonium chloride up to sixteen-fold against planktonic cells in an S. aureus-C. albicans mixed culture and repressed the adhesion of S. aureus. The mechanism of both (-)-myrtenol and (+)-myrtenol synergy with conventional drugs was apparently driven by membrane damage since the treatment with both terpenes led to a significant drop in membrane potential similar to the action of benzalkonium chloride. Thus, due to the low toxicity of myrtenol, it seems to be a promising agent to increase the efficiency of the treatment of infections caused by bacteria and be fungi of the genus Candida as well as mixed fungal-bacterial infections, including resistant strains.

4.
J Pers Med ; 12(9)2022 Sep 11.
Article de Anglais | MEDLINE | ID: mdl-36143273

RÉSUMÉ

Genetic polymorphisms affect lipid profiles and are associated with disease complications. Genetic variants in the vitamin D receptor (VDR) gene are associated with type 2 diabetes mellitus (T2DM). In this study, we investigated the effects of VDR genotypes on the lipid profile and disease complications of T2DM patients in a Jordanian population. Ninety T2DM patients were genotyped for four major functional VDR genetic variants, rs2228570 C > T (FokI), rs7975232 A > C (ApaI), rs731236 T > C (TaqI), and rs1544410 C > T (BsmI), using the polymerase chain reaction−restriction fragment length polymorphism method. Lipid profiles and diabetes complications were analyzed and correlated with VDR genotypes. We found that the VDR rs7975232 and rs1544410 alleles were significantly (p = 0.008−0.04) associated with high-density lipoprotein (HDL) levels and retinopathy among patients. Carriers of the rs7975232 A/A genotype exhibited higher levels (49.68 ± 15.86 mg/dL) of HDL than patients with the A/C (44.73 ± 13.38 mg/dL) and C/C (37.93 ± 9.22 mg/dL) genotypes. Moreover, carriers of the rs1544410 T/T genotype had higher levels of HDL (54.31 ± 16.45 mg/dL) than patients with the C/T (43.57 ± 13.24 mg/dL) and C/C (43.98 ± 13.17 mg/dL) genotypes. T2DM patients who carry the rs7975232 C/C genotype were at higher risk (odds ratio [OR] = 7.88) of developing retinopathy compared with carriers of the rs7975232 C/A and A/A genotypes. In addition, T2DM patients with the rs1544410 C/C genotype had a higher risk (OR = 4.21) of developing retinopathy than patients with the rs1544410 C/T and T/T genotypes. Therefore, we concluded that the VDR rs7975232 and rs1544410 alleles were associated with HDL levels and retinopathy and can be considered as potential genetic biomarkers for the lipid profile and retinopathy complication among T2DM patients in a Jordanian population of Arabic origin. Further studies with larger sample sizes are needed to confirm our findings.

5.
Health Qual Life Outcomes ; 20(1): 105, 2022 Jul 06.
Article de Anglais | MEDLINE | ID: mdl-35794607

RÉSUMÉ

BACKGROUND: For nearly a decade, value sets for the EQ-5D-Y were not available, reflecting challenges in valuing child HRQoL. A methodological research programme led to publication of a valuation protocol in 2020, which was rapidly taken up by local study teams. By the end of 2022, between 11 and 17 EQ-5D-Y value sets will be available, more than for any other child HRQoL measure. It is timely to review the experience of those using the protocol to identify early learnings and remaining issues where more research is needed. METHODS: In June 2021, the EuroQol Group organised a three-day workshop, bringing together all those involved in EQ-5D-Y value set studies and related methodological research concerning EQ-5D-Y and valuation. Workshop discussions were captured by note taking and recording all sessions and online chat. A narrative summary of all sessions was produced and synthesised to identify points of agreement and aspects of methods where uncertainty remains. RESULTS: There was broad agreement that DCE is working well as the principal valuation method. However, the most appropriate means of anchoring the latent scale values produced by DCE remains unclear. Some studies have deviated from the protocol by extending the number of states included in TTO tasks, to better support modelling of DCE and TTO. There is ongoing discussion about the relative merits of alternative variants of TTO and other methods for anchoring. Very few studies have consulted with local end-users to gauge the acceptability of methods used to value EQ-5D-Y. CONCLUSIONS: Priority areas for research include testing alternative methods for anchoring DCE data; exploring the preferences of adolescents; and scale differences in values for EQ-5D-Y and adult EQ-5D states, and implications of such differences for the use of EQ-5D-Y values in HTA. Given the normative elements of the protocol, engaging with HTA bodies and other local users should be the first step for all future value set studies. Value sets undertaken to date are for the three-level EQ-5D-Y. However, the issues discussed in this paper are equally relevant to valuation of the five-level version of EQ-5D-Y; indeed, similar challenges are encountered valuing any measure of child HRQoL.


Sujet(s)
Qualité de vie , Adolescent , Adulte , Enfant , Famille , Humains , Plan de recherche , Enquêtes et questionnaires
6.
Int J Surg Case Rep ; 88: 106479, 2021 Nov.
Article de Anglais | MEDLINE | ID: mdl-34688069

RÉSUMÉ

INTRODUCTION: Allergic fungal rhinosinusitis (AFRS) is a subtype of chronic rhinosinusitis with nasal polyps. It is characterized by eosinophilic mucin, which results from an inflammatory reaction to non-invasive fungal hyphae in the rhino-sinuses. It is clinically recognizable due to the criteria set by Bent and Kuhn. The treatment approach is multimodal, and the main treatment approach is surgical debridement, followed by a course of oral and/or topical corticosteroids to decrease recurrence post-surgery. This case report aims to illustrate the effect of Dupilumab, on the number of relapse episodes in a patient and the associated parameters. CASE PRESENTATION: Herein we report a case of a 40-year-old woman referred to our institution as a case of refractory AFRS for which she underwent four functional endoscopic sinus surgeries (FESS) and was on maximum medical treatment. She presented with complaints of facial fullness and pain, headache, and purulent discharge. After another trial of surgery which did not control her symptoms, she was assessed for criteria to start biological treatment. The symptoms were successfully controlled after initiation of the agent, and she was followed up using multiple subjective and objective measures. CONCLUSION: AFRS is a non-invasive immune-mediated sub-clinical entity of chronic rhinosinusitis. A multimodal approach to its treatment based on surgical debridement with medical therapy has shown positive outcomes. In this case we present significant improvement after administering Dupilumab; therefore, suggesting its addition to the treatment regimen of refractory AFRS.

7.
Open Forum Infect Dis ; 8(8): ofab368, 2021 Aug.
Article de Anglais | MEDLINE | ID: mdl-34458392

RÉSUMÉ

BACKGROUND: Antibiotic treatment decisions in severely ill patients must often be made in the absence of microbiologic results. The recently Food and Drug Administration-cleared BioFire FilmArray Pneumonia Panel (PN) detects 15 bacteria semiquantitatively, 3 atypical pneumonia bacteria, 8 viruses, and 7 antimicrobial resistance markers by multiplex PCR in ~1 hour in the laboratory. Previous reports have shown that the PN Panel bacterial detections are highly accurate, even when routine culture had no growth. METHODS: Consecutive bronchoalveolar lavage and endotracheal specimens submitted for culture between June and September 2018 from 270 patients with sufficient clinical and laboratory data were tested with the PN Panel. Patients were divided into 3 groups: (1) both culture and PN Panel positive, (2) PN Panel positive but culture uninformative (no growth or normal flora), and (3) patients with no PN Panel detections. RESULTS: Groups 1 and 2 had significantly higher maximum temperatures on the day of culture (P = .00036, analysis of variance [ANOVA] with Bonferroni correction), higher levels of an inflammatory response as measured by percent polymorphonuclear leukocytes in bronchoalveolar lavage (P = .00025, ANOVA with Bonferroni correction), and gram stain report of white blood cells, as previously reported [1]. CONCLUSIONS: Both group 1 (culture and PN Panel positive), and group 2 (PN Panel positive but culture uninformative) had higher levels of host response inflammatory responses compared with group 3, which had no targets detected, suggesting that PN Panel detections need to be interpreted in the clinical context, even if cultures are discordant. Depending on laboratory turnaround time, there could be opportunities for improved diagnosis and antibiotic stewardship.

8.
Prz Menopauzalny ; 19(2): 66-71, 2020 Jul.
Article de Anglais | MEDLINE | ID: mdl-32802016

RÉSUMÉ

INTRODUCTION: Emergency peripartum hysterectomy (EPH) is a foremost operation and is perpetually implemented in the presence of life intimidating hemorrhage during or immediately after abdominal or vaginal deliveries. The aim of this study was to review cases managed at the Department of Gynecology and Obstetrics at Jordan University Hospital (JUH). MATERIAL AND METHODS: All women who underwent EPH due to any cause in the period from January 2010, to December 2017 were included in the study. Data were collected retrospectively using the patients' files namelessly. Main measures: age, gravidity, parity, number of previous cesarean sections, previous uterine surgeries, indication for hysterectomy, complications, antepartum bleeding and the need for blood transfusion. RESULTS: In total, 74 cases of EPH were managed during the study period. The incidence of EPH ranged from 0.24 to 8.7 per 1000 deliveries. EPH was found to be more common following cesarean sections than vaginal deliveries. The prime indication was abnormal placentation, uterine atony, and uterine rupture. The risk factors included previous cesarean sections, scarred uteruses, multiparity, older age group. Maternal morbidity ranged from 26.5 to 31.5% and mortality from 0 to 12.5% with a mean of 4.8%. CONCLUSIONS: EPH is the most demanding obstetric surgery performed in very tiresome circumstances of life threatening hemorrhage. The indication for EPH in recent years has changed from outdated uterine atony to abnormal placentation. Antenatal eagerness of the risk factors, engrossment of proficient obstetricians at an early stage of management and a prompt hysterectomy after adequate resuscitation would go a long way in tumbling morbidity and mortality.

9.
Prz Menopauzalny ; 19(1): 25-29, 2020 Mar.
Article de Anglais | MEDLINE | ID: mdl-32508553

RÉSUMÉ

INTRODUCTION: Cesarean section (CS) delivery is the most common major obstetrical surgical operation carried out in and is increasing in incidence throughout the world. The major involves some risks that might include: infection, coagulation problem, loss of blood, bowel or bladder injury, abnormalities of the placenta in subsequent pregnancies. AIM OF THE STUDY: To evaluate the clinical effectiveness of postoperative CS intra-abdominal drain insertion. MATERIAL AND METHODS: A prospective study was conducted on 245 patients in labor, at the Department of Obstetrics and Gynecology, Jordan University Hospital, between January 2017 and January 2018. Participants were divided into two groups: group I including those who had abdominal drains insertion during surgery and group II including women who had no abdominal drain inserted before closure. All patients on both groups were term pregnancies, underwent elective vs. emergency CS, and had no subcutaneous drains inserted. RESULTS: Clinical and surgical parameters were comparable in both groups. Postoperative hospital stay was significantly shorter in group II, whereas specific postoperative complication rate was significantly higher in group I. Drain site infection was noted in 2 (1.6%), organ herniation in 2 (1.6%), drain avulsion in 2 (1.6%), severe pain at the site of insertion in 2 (1.6%) patients. CONCLUSIONS: Routine prophylactic intra-abdominal drain insertion post CS has no benefits and therefore should be stopped.

10.
World Allergy Organ J ; 13(4): 100117, 2020 Apr.
Article de Anglais | MEDLINE | ID: mdl-32382379

RÉSUMÉ

BACKGROUND: Chronic urticaria (CU) is a condition characterized by recurrent itchy hives and/or angioedema for ≥6 weeks. Most of the data about CU come from western countries with very little information available about CU in Asia, Africa, and the Middle East. METHODS: AWARE-AMAC is a 24-month prospective, observational, real-world, non-interventional study in patients aged ≥18 years from Asia, the Middle East, and Africa (AMAC) with CU refractory to H1-antihistamines (H1-AH). The main objective was to describe the real-world experience with CU, including clinical characteristics, presence of angioedema, treatment patterns (shifts between treatment classes and changes within a treatment class), investigator-assessed disease control, and the impact on quality of life. Subgroups of interest were type of CU at Baseline and treatment class (based on 2013 urticaria guidelines). There were no mandatory visits and diagnostic/monitoring procedures additional to routine practice, except the patient diary (7-day Urticaria Activity Score) and patient reported outcome assessments. RESULTS: The focus of the current manuscript is on patients with chronic spontaneous urticaria (CSU), who formed 98% of the sample. Patients were predominantly female (69.6% female, mean age ± SD 39.8 ± 13.29 years). Time since current diagnosis (Mean ± SD) was 28.6 ± 49.06 months. Amongst patients with CSU, 31.0% had comorbid chronic inducible urticaria (CINDU) and 46.4% had a history of angioedema. 91.9% received H1-AH therapy (±other treatments). The most frequently prescribed treatment classes at Baseline were any/combination of medications, not classified under the other 7 treatment classes, named "Others" (30.5%) followed by, omalizumab (OMA; 23.6%) and second-generation H1-AH monotherapy (sgAH; 15.1%). At Month 12, the most prescribed treatment classes (>15%) for patients were OMA (23.5%) and "Other" (21.3%); 19.7% received "No drug". At Month 24, OMA (22.5%), and "Other" (17.9%) were most frequently prescribed; 28.6% received "No drug". Overall, 79.5% of patients had some type of change in treatment. Over the study period, improvement in self-reported QoL increased, which was mirrored by better disease control. CONCLUSION: In AMAC countries, the non-recommended "Other" treatment class played a major role in the initial management of CU patients. High usage of H1-AH (±other treatments) and OMA was observed. Treatment changes were observed in a majority of patients. Treatment escalation from sgAH was mostly via OMA. Improvement of disease control and QoL was achieved during the study period. TRIAL REGISTRATION: Observational study (NA).

11.
IEEE Rev Biomed Eng ; 13: 292-308, 2020.
Article de Anglais | MEDLINE | ID: mdl-31634142

RÉSUMÉ

This review presents a practical primer for functional near-infrared spectroscopy (fNIRS) with respect to technology, experimentation, and analysis software. Its purpose is to jump-start interested practitioners considering utilizing a non-invasive, versatile, nevertheless challenging window into the brain using optical methods. We briefly recapitulate relevant anatomical and optical foundations and give a short historical overview. We describe competing types of illumination (trans-illumination, reflectance, and differential reflectance) and data collection methods (continuous wave, time domain and frequency domain). Basic components (light sources, detection, and recording components) of fNIRS systems are presented. Advantages and limitations of fNIRS techniques are offered, followed by a list of very practical recommendations for its use. A variety of experimental and clinical studies with fNIRS are sampled, shedding light on many brain-related ailments. Finally, we describe and discuss a number of freely available analysis and presentation packages suited for data analysis. In conclusion, we recommend fNIRS due to its ever-growing body of clinical applications, state-of-the-art neuroimaging technique and manageable hardware requirements. It can be safely concluded that fNIRS adds a new arrow to the quiver of neuro-medical examinations due to both its great versatility and limited costs.


Sujet(s)
Encéphale , Neuroimagerie/méthodes , Spectroscopie proche infrarouge/méthodes , Encéphale/vascularisation , Encéphale/imagerie diagnostique , Hémoglobines/analyse , Humains
12.
Annu Int Conf IEEE Eng Med Biol Soc ; 2019: 4770-4774, 2019 Jul.
Article de Anglais | MEDLINE | ID: mdl-31946928

RÉSUMÉ

Intralipid emulsion is often used as optical model substance to mimick living tissue's strong scattering properties. As such it is of considerable importance to utilize realistic parameters for any type of simulation or calculation in context of Near Infrared Spectroscopy. We determined optical properties of diluted Intralipid solutions at often used, realistic volume concentrations ρil and at two NIRS wavelengths (780nm and 850nm) in a double integrating Ulbricht-sphere setup. The results were used in Monte Carlo (MC) simulations of an experiment, described in our companion paper. Both, phantom experiments and MC simulation showed qualitatively similar results and demonstrated the effects of changing the three major NIRS factors, namely the penetrated layer depth (d), the Intralipid concentration ρil and the source-detector separation (SDS). The results demonstrated that light reaching the detectors was inversely proportional to ρil and d. It also showed that very low Intralipid concentrations do not follow the optical properties documented for Intralipid 20%.


Sujet(s)
Lipides/composition chimique , Fantômes en imagerie , Diffusion de rayonnements , Spectroscopie proche infrarouge , Simulation numérique , Émulsions/composition chimique , Humains , Méthode de Monte Carlo
13.
Annu Int Conf IEEE Eng Med Biol Soc ; 2019: 4775-4778, 2019 Jul.
Article de Anglais | MEDLINE | ID: mdl-31946929

RÉSUMÉ

Intralipid emulsion is often used as optical model substance to mimic living tissue's strong scattering properties. As such it is of considerable importance to utilize realistic parameters for any type of simulation or calculation in context of Near Infrared Spectroscopy. We determined optical characteristics of diluted Intralipid solutions at often used, realistic volume concentrations ρil and at two wavelengths (780nm and 850nm) in a simple phantom setup featuring multiple sensors with different source-detector-separation (SDS) and penetration depths d. Both, phantom experiments and MC simulation showed qualitatively similar results and demonstrated the influence of the three major NIRS factors, namely the penetrated layer depth (d), the Intralipid concentration ρil and the source-detector separation (SDS). The results demonstrated that light reaching the detectors is inversely proportional to ρil and d. It corroborates the need for differential measurements with at least two SDS to account for superficial large angle scattering.


Sujet(s)
Lipides/composition chimique , Fantômes en imagerie , Spectroscopie proche infrarouge , Humains
14.
J Allergy Clin Immunol Pract ; 7(3): 848-855, 2019 03.
Article de Anglais | MEDLINE | ID: mdl-30391550

RÉSUMÉ

BACKGROUND: Biallelic variations in the dedicator of cytokinesis 8 (DOCK8) gene cause a combined immunodeficiency with eczema, recurrent bacterial and viral infections, and malignancy. Natural disease outcome is dismal, but allogeneic hematopoietic stem cell transplantation (HSCT) can cure the disease. OBJECTIVE: To determine outcome of HSCT for DOCK8 deficiency and define possible outcome variables. METHODS: We performed a retrospective study of the results of HSCT in a large international cohort of DOCK8-deficient patients. RESULTS: We identified 81 patients from 22 centers transplanted at a median age of 9.7 years (range, 0.7-27.2 years) between 1995 and 2015. After median follow-up of 26 months (range, 3-135 months), 68 (84%) patients are alive. Severe acute (III-IV) or chronic graft versus host disease occurred in 11% and 10%, respectively. Causes of death were infections (n = 5), graft versus host disease (5), multiorgan failure (2), and preexistent lymphoma (1). Survival after matched related (n = 40) or unrelated (35) HSCT was 89% and 81%, respectively. Reduced-toxicity conditioning based on either treosulfan or reduced-dose busulfan resulted in superior survival compared with fully myeloablative busulfan-based regimens (97% vs 78%; P = .049). Ninety-six percent of patients younger than 8 years at HSCT survived, compared with 78% of those 8 years and older (P = .06). Of the 73 patients with chimerism data available, 65 (89%) had more than 90% donor T-cell chimerism at last follow-up. Not all disease manifestations responded equally well to HSCT: eczema, infections, and mollusca resolved quicker than food allergies or failure to thrive. CONCLUSIONS: HSCT is curative in most DOCK8-deficient patients, confirming this approach as the treatment of choice. HSCT using a reduced-toxicity regimen may offer the best chance for survival.


Sujet(s)
Facteurs d'échange de nucléotides guanyliques/déficit , Transplantation de cellules souches hématopoïétiques , Déficits immunitaires/thérapie , Adolescent , Adulte , Enfant , Enfant d'âge préscolaire , Femelle , Maladie du greffon contre l'hôte , Humains , Déficits immunitaires/mortalité , Nourrisson , Estimation de Kaplan-Meier , Mâle , Jeune adulte
15.
Article de Anglais | MEDLINE | ID: mdl-27464353

RÉSUMÉ

The symptom literature in cancer has primarily examined symptom severity, frequency and distress. Assessing cancer patients' perceptions of symptom importance-how important it is for them to see improvement in a symptom following an intervention-and factors influencing these judgments would also inform patient-centred care, but this analysis has not been undertaken. This qualitative study aimed to identify factors underlying perceptions of symptom importance among 25 symptomatic metastatic breast cancer (MBC) patients. Participants were recruited from a cancer centre in the Midwestern USA. Semi-structured interviews focused on patients' rationale for considering common symptoms (i.e., anxiety, sadness, sleep problems, pain or fatigue) to be important. Thematic analyses revealed five interrelated factors underlying MBC patients' perceptions of symptom importance: activity restriction, concentration difficulties, exacerbation of other physical symptoms, symptom-related long-term health concerns and negative impact on their relationships with others. Patients most frequently stated that a physical or psychological symptom was important because of the resulting activity restriction. Additionally, some patients considered pain to be important because it signalled potential long-term health concerns, such as worsening metastatic disease. Findings suggest that clinicians should take into account MBC patients' perceptions of symptom importance and factors underlying these judgments when making shared treatment decisions.


Sujet(s)
Attitude envers la santé , Tumeurs du sein/psychologie , Activités de la vie quotidienne , Adulte , Sujet âgé , Anxiété/étiologie , Attention/physiologie , Émotions , Fatigue/étiologie , Femelle , Humains , Relations interpersonnelles , Adulte d'âge moyen , États du Centre-Ouest des États-Unis , Métastase tumorale , Douleur/psychologie , Perception
16.
PLoS One ; 11(2): e0147730, 2016.
Article de Anglais | MEDLINE | ID: mdl-26828947

RÉSUMÉ

With the continued miniaturisation of portable embedded systems, wireless EEG recording techniques are becoming increasingly prevalent in animal behavioural research. However, in spite of their versatility and portability, they have seldom been used inside water-maze tasks designed for rats. As such, a novel 3D printed implant and waterproof connector is presented, which can facilitate wireless water-maze EEG recordings in freely-moving rats, using a commercial wireless recording system (W32; Multichannel Systems). As well as waterproofing the wireless system, battery, and electrode connector, the implant serves to reduce movement-related artefacts by redistributing movement-related forces away from the electrode connector. This implant/connector was able to successfully record high-quality LFP in the hippocampo-striatal brain regions of rats as they undertook a procedural-learning variant of the double-H water-maze task. Notably, there were no significant performance deficits through its use when compared with a control group across a number of metrics including number of errors and speed of task completion. Taken together, this method can expand the range of measurements that are currently possible in this diverse area of behavioural neuroscience, whilst paving the way for integration with more complex behaviours.


Sujet(s)
Électroencéphalographie/méthodes , Apprentissage du labyrinthe , Eau , Technologie sans fil , Potentiels d'action , Animaux , Artéfacts , Comportement animal , Femelle , Rat Sprague-Dawley , Crâne/anatomie et histologie , Analyse et exécution des tâches
17.
Intrinsically Disord Proteins ; 3(1): e1071302, 2015.
Article de Anglais | MEDLINE | ID: mdl-28232892

RÉSUMÉ

Parkinson's disease is associated with fibril deposition in the diseased brain. Misfolding events of the intrinsically disordered synaptic protein α-synuclein are suggested to lead to the formation of transient oligomeric and cytotoxic species. The etiology of Parkinson's disease is further associated with mitochondrial dysfunction and formation of reactive oxygen species. Oxidative stress causes chemical modification of native α-synuclein, plausibly further influencing misfolding events. Here, we present evidence for the spontaneous formation of covalent di-tyrosine α-synuclein dimers in standard recombinant protein preparations, induced without extrinsic oxidative or nitrative agents. The dimers exhibit no secondary structure but advanced SAXS studies reveal an increased structural definition, resulting in a more hydrophobic micro-environment than the highly disordered monomer. Accordingly, monomers and dimers follow distinct fibrillation pathways.

18.
Annu Int Conf IEEE Eng Med Biol Soc ; 2015: 1067-70, 2015 Aug.
Article de Anglais | MEDLINE | ID: mdl-26736449

RÉSUMÉ

In this work we used multimodal, non-invasive brain signal recording systems, namely Near Infrared Spectroscopy (NIRS), disc electrode electroencephalography (EEG) and tripolar concentric ring electrodes (TCRE) electroencephalography (tEEG). 7 healthy subjects participated in our experiments to control a 2-D Brain Computer Interface (BCI). Four motor imagery task were performed, imagery motion of the left hand, the right hand, both hands and both feet. The signal slope (SS) of the change in oxygenated hemoglobin concentration measured by NIRS was used for feature extraction while the power spectrum density (PSD) of both EEG and tEEG in the frequency band 8-30Hz was used for feature extraction. Linear Discriminant Analysis (LDA) was used to classify different combinations of the aforementioned features. The highest classification accuracy (85.2%) was achieved by using features from all the three brain signals recording modules. The improvement in classification accuracy was highly significant (p = 0.0033) when using the multimodal signals features as compared to pure EEG features.


Sujet(s)
Interfaces cerveau-ordinateur , Algorithmes , Encéphale , Analyse discriminante , Électrodes , Électroencéphalographie , Humains , Imagination , Imagerie multimodale , Interface utilisateur
19.
Nat Commun ; 5: 3856, 2014 Jun 12.
Article de Anglais | MEDLINE | ID: mdl-24920014

RÉSUMÉ

Recent genome-wide association studies (GWAS) of Hodgkin lymphoma (HL) have identified associations with genetic variation at both HLA and non-HLA loci; however, much of heritable HL susceptibility remains unexplained. Here we perform a meta-analysis of three HL GWAS totaling 1,816 cases and 7,877 controls followed by replication in an independent set of 1,281 cases and 3,218 controls to find novel risk loci. We identify a novel variant at 19p13.3 associated with HL (rs1860661; odds ratio (OR)=0.81, 95% confidence interval (95% CI) = 0.76-0.86, P(combined) = 3.5 × 10(-10)), located in intron 2 of TCF3 (also known as E2A), a regulator of B- and T-cell lineage commitment known to be involved in HL pathogenesis. This meta-analysis also notes associations between previously published loci at 2p16, 5q31, 6p31, 8q24 and 10p14 and HL subtypes. We conclude that our data suggest a link between the 19p13.3 locus, including TCF3, and HL risk.


Sujet(s)
Facteurs de transcription à motif basique hélice-boucle-hélice/génétique , Chromosomes humains de la paire 19/génétique , Prédisposition génétique à une maladie , Maladie de Hodgkin/génétique , Adolescent , Adulte , Sujet âgé , Sujet âgé de 80 ans ou plus , Études cas-témoins , Variation génétique , Étude d'association pangénomique , Humains , Mâle , Adulte d'âge moyen , Jeune adulte
20.
Blood Cancer J ; 3: e121, 2013 Jun 28.
Article de Anglais | MEDLINE | ID: mdl-23811785

RÉSUMÉ

Recent studies have reported an increased risk of second primary malignancies (SPM) following multiple myeloma (MM) diagnosis associated with novel anti-myeloma treatments. We evaluated the risk of SPM among 36 491 MM cases reported to the Surveillance, Epidemiology, and End Results program (SEER) between 1973 and 2008. We calculated overall and site-specific standardized incidence ratio (SIR) and 95% confidence intervals (CI) for 2012 SPM cases diagnosed within the 35-year follow-up. There was no significant overall risk of SPM (SIR=0.98; 95% CI=0.94-1.02); however, there were multiple site-specific risk patterns. The risk of breast and prostate cancer was significantly decreased overall and across age, latency and the year of diagnosis strata. There was an ∼50% increased risk of colorectal cancer 5 years after MM diagnosis (Ptrend<0.001). The risk of hematological malignancies was significantly increased, notably for acute myeloid leukemia (AML; SIR=6.51; 95% CI=5.42-7.83). There was a significant decreasing trend for AML over time, particularly for patients 65. However, no significant change in risk was noted after the introduction of autologous stem cell transplant among younger patients (<65 years). On the basis of observed trends for overall SPM as well as AML, no association between the introduction of novel therapies and SPM following MM has emerged in this large population-based study.

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