يعرض 1 - 10 نتائج من 93 نتيجة بحث عن '"Diagnostic markers"', وقت الاستعلام: 0.74s تنقيح النتائج
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    المساهمون: Chan, Kit Man, Gleadle, Jonathan M., O'Callaghan, Michael, Vasilev, Krasimir, MacGregor, Melanie

    المصدر: Prostate Cancer and Prostatic Diseases. 25:39-46

    الوصف: Refereed/Peer-reviewed Background: Current diagnostic methods for prostate cancer are invasive and lack specificity towards aggressive forms of the disease, which can lead to overtreatment. A new class of non-invasive alternatives is under development, in which urinary biomarkers are detected using biosensing devices to offer rapid and accurate prostate cancer diagnosis. These different approaches are systematically reviewed and their potential for translation to clinical practice is evaluated. Methods: A systematic review of the literature was performed in May 2021 using PubMed Medline database, Embase, and Web of Science. The objective was to review the structural designs and performance of biosensors tested on urine samples from patients with prostate cancer. Results: A total of 76 records were identified. After screening and eligibility, 14 articles were included and are discussed in this paper. The biosensors were discussed based on the target biomarkers and detection technologies used, as well as the results of the clinical studies. Most of the works reported good discrimination between patients with prostate cancer and controls. Conclusions: This review highlights the potential of urinary biosensors for non-invasive prostate cancer detection. However, clinical studies have so far only been conducted on small cohorts of patient, with large scale trials still needed to validate the proposed approaches. Overall, the consensus arising from the proof of concepts studies reviewed here, is that an adequate combination of biomarkers into multiplex biosensor platforms is required to achieve accurate diagnostic tests. Furthermore, whether such devices can discriminate between aggressive and indolent cancer has not yet been addressed, because it entails optimized biomarkers panels and long-term clinical trials.

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    المصدر: Nature Medicine

    الوصف: Anemia in astronauts has been noted since the first space missions, but the mechanisms contributing to anemia in space flight have remained unclear. Here, we show that space flight is associated with persistently increased levels of products of hemoglobin degradation, carbon monoxide in alveolar air and iron in serum, in 14 astronauts throughout their 6-month missions onboard the International Space Station. One year after landing, erythrocytic effects persisted, including increased levels of hemolysis, reticulocytosis and hemoglobin. These findings suggest that the destruction of red blood cells, termed hemolysis, is a primary effect of microgravity in space flight and support the hypothesis that the anemia associated with space flight is a hemolytic condition that should be considered in the screening and monitoring of both astronauts and space tourists.
    Biomarkers of red blood cell destruction were elevated in astronauts while on long-duration missions on the International Space Station, suggesting that hemolysis is a major contributor to space anemia.

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    المصدر: Cellular and Molecular Immunology

    الوصف: In addition to susceptibility to infections, conventional primary immunodeficiency disorders (PIDs) and inborn errors of immunity (IEI) can cause immune dysregulation, manifesting as lymphoproliferative and/or autoimmune disease. Autoimmunity can be the prominent phenotype of PIDs and commonly includes cytopenias and rheumatological diseases, such as arthritis, systemic lupus erythematosus (SLE), and Sjogren’s syndrome (SjS). Recent advances in understanding the genetic basis of systemic autoimmune diseases and PIDs suggest an at least partially shared genetic background and therefore common pathogenic mechanisms. Here, we explore the interconnected pathogenic pathways of autoimmunity and primary immunodeficiency, highlighting the mechanisms breaking the different layers of immune tolerance to self-antigens in selected IEI.

  4. 4

    المصدر: Scientific Reports, Vol 12, Iss 1, Pp 1-12 (2022)
    Scientific Reports

    الوصف: Insulin resistance (IR) affects a quarter of the world’s adult population and is a major factor in the pathogenesis of cardio-metabolic disease. In this pilot study, we implemented a non-invasive breathomics approach, combined with random forest machine learning, to investigate metabolic markers from obese pre-diabetic Hispanic adolescents as indicators of abnormal metabolic regulation. Using the ReCIVA breathalyzer device for breath collection, we have identified a signature of 10 breath metabolites (breath-IR model), which correlates with Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) (R = 0.95, p p p p = 0.003, p = 0.002, and p

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    المؤلفون: Dion-Albert, Laurence, Cadoret, Alice, Doney, Ellen, Kaufmann, Fernanda Neutzling, Dudek, Katarzyna A., Daigle, Beatrice, Parise, Lyonna F., Cathomas, Flurin, Samba, Nalia, Hudson, Natalie, Lebel, Manon, Aardema, Frederic, Ait Bentaleb, Lahcen, Beauchamp, Janique, Bendahmane, Hicham, Benoit, Elise, Bergeron, Lise, Bertone, Armando, Bertrand, Natalie, Berube, Felix-Antoine, Blanchet, Pierre, Boissonneault, Janick, Bolduc, Christine J., Bonin, Jean-Pierre, Borgeat, Francois, Boyer, Richard, Breault, Chantale, Breton, Jean-Jacques, Briand, Catherine, Brodeur, Jacques, Brule, Krystele, Brunet, Lyne, Carriere, Sylvie, Chartrand, Carine, Chenard-Soucy, Rosemarie, Chevrette, Tommy, Cloutier, Emmanuelle, Cloutier, Richard, Cormier, Hugues, Cote, Gilles, Cyr, Joanne, David, Pierre, De Benedictis, Luigi, Delisle, Marie-Claude, Deschenes, Patricia, Desjardins, Cindy D., Desmarais, Gilbert, Dubreucq, Jean-Luc, Dumont, Mimi, Dumais, Alexandre, Ethier, Guylaine, Feltrin, Carole, Felx, Amelie, Findlay, Helen, Fortier, Linda, Fortin, Denise, Fortin, Leo, Francois, Nathe, Gagne, Valerie, Gagnon, Marie-Pierre, Gignac-Hens, Marie-Claude, Giguere, Charles-Edouard, Godbout, Roger, Grou, Christine, Guay, Stephane, Guillem, Francois, Hachimi-Idrissi, Najia, Herry, Christophe, Hodgins, Sheilah, Homayoun, Saffron, Jemel, Boutheina, Joyal, Christian, Kouassi, Edouard, Labelle, Real, Lafortune, Denis, Lahaie, Michel, Lahlafi, Souad, Lalonde, Pierre, Landry, Pierre, Lapaige, Veronique, Larocque, Guylaine, Larue, Caroline, Lavoie, Marc, Leclerc, Jean-Jacques, Lecomte, Tania, Lecours, Cecile, Leduc, Louise, Lelan, Marie-France, Lemieux, Andre, Lesage, Alain, Letarte, Andree, Lepage, Jean, Levesque, Alain, Lipp, Olivier, Luck, David, Lupien, Sonia, Lusignan, Felix-Antoine, Lusignan, Richard, Luyet, Andre J., Lynhiavu, Alykhanhthi, Melun, Jean-Pierre, Morin, Celine, Nicole, Luc, Noel, Francois, Normandeau, Louise, O’Connor, Kieron, Ouellette, Christine, Parent, Veronique, Parizeau, Marie-Helene, Pelletier, Jean-Francois, Pelletier, Julie, Pelletier, Marc, Plusquellec, Pierrich, Poirier, Diane, Potvin, Stephane, Prevost, Guylaine, Prevost, Marie-Josee, Racicot, Pierre, Racine-Gagne, Marie-France, Renaud, Patrice, Ricard, Nicole, Rivet, Sylvie, Rolland, Michel, Sasseville, Marc, Safadi, Gabriel, Smith, Sandra, Smolla, Nicole, Stip, Emmanuel, Teitelbaum, Jakob, Thibault, Alfred, Thibault, Lucie, Thibault, Stephanye, Thomas, Frederic, Todorov, Christo, Tourjman, Valerie, Tranulis, Constantin, Trudeau, Sonia, Trudel, Gilles, Vacri, Nathalie, Valiquette, Luc, Vanier, Claude, Villeneuve, Kathe, Villeneuve, Marie, Vincent, Philippe, Wolfe, Marcel, Xiong, Lan, Zizzi, Angela, Campbell, Matthew, Turecki, Gustavo, Mechawar, Naguib, Menard, Caroline

    المصدر: Nature Communications
    Nature Communications, Vol 13, Iss 1, Pp 1-18 (2022)

    الوصف: Prevalence, symptoms, and treatment of depression suggest that major depressive disorders (MDD) present sex differences. Social stress-induced neurovascular pathology is associated with depressive symptoms in male mice; however, this association is unclear in females. Here, we report that chronic social and subchronic variable stress promotes blood-brain barrier (BBB) alterations in mood-related brain regions of female mice. Targeted disruption of the BBB in the female prefrontal cortex (PFC) induces anxiety- and depression-like behaviours. By comparing the endothelium cell-specific transcriptomic profiling of the mouse male and female PFC, we identify several pathways and genes involved in maladaptive stress responses and resilience to stress. Furthermore, we confirm that the BBB in the PFC of stressed female mice is leaky. Then, we identify circulating vascular biomarkers of chronic stress, such as soluble E-selectin. Similar changes in circulating soluble E-selectin, BBB gene expression and morphology can be found in blood serum and postmortem brain samples from women diagnosed with MDD. Altogether, we propose that BBB dysfunction plays an important role in modulating stress responses in female mice and possibly MDD.
    The vascular, cellular and molecular changes underlying sex differences in mood disorders are unclear. Here, the authors show that blood-brain barrier dysfunction modulates anxiety- and depressive-like behaviors in female mice and endothelium-specific changes associated with maladaptive responses compared to resilience to stress.

  6. 6

    المصدر: Scientific Reports
    Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)

    الوصف: To find baseline predictors for subretinal fibrosis (SF) in neovascular age-related macular degeneration (nAMD). Forty-five eyes of 45 participants with treatment-naïve nAMD were consecutively enrolled and treated according to a standardized treat-and-extend protocol. Spectral-domain optical coherence tomography (OCT), color fundus photography and fluorescein angiography as well as novel imaging modalities polarization-sensitive OCT and OCT angiography (OCTA) were performed to detect SF after 1 year and find baseline predictors for SF development. Baseline OCTA scans were evaluated for quantitative features such as lesion area, vessel area, vessel junctions, vessel length, vessel endpoints and mean lacunarity. Additionally, the type of macular neovascularization, the presence of subretinal fluid, intraretinal fluid (IRF), subretinal hyperreflective material (SHRM), retinal hemorrhage as well as best-corrected visual acuity (BCVA) were evaluated. After 12 months 8 eyes (18%) developed SF. Eyes with SF had worse baseline BCVA (p = .001) and a higher prevalence of IRF (p = .014) and SHRM at baseline (p = .017). There was no significant difference in any of the evaluated quantitative OCTA parameters (p > .05) between eyes with and without SF. There were no quantitative baseline microvascular predictors for SF in our study. Low baseline BCVA, the presence of IRF and SHRM, however, are easily identifiable baseline parameters indicating increased risk.

  7. 7

    المصدر: Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
    Scientific Reports

    الوصف: Elevated serum ferritin (SFer) levels are implicated in many energy metabolism abnormalities. The association between SFer levels and metabolic disorders has not been studied in Middle Eastern populations. We aimed at exploring the association between SFer levels and serum lipids, diabetes determinants, and metabolic syndrome in a sample of Qatari adults. This study used biochemical parameters obtained from 1928 participants from the Qatar Biobank cohort. We utilized adjusted multivariable logistic regression analysis to estimate the odds ratios (ORs) for dyslipidemia, type 2 diabetes, the homeostasis model assessment of insulin resistance (HOMA-IR), and metabolic syndrome (MetS) according to sex-specific SFer quartiles (Q1 to Q4). Results revealed that the ORs for dyslipidemia increased progressively and significantly across the SFer quartiles, up to two folds in Q4 for women (OR 2.47 (1.68–3.62)) and men (OR 2.24 (1.41–3.55)) versus Q1 (OR:1). Exclusively in women, the ORs for IR (HOMA-IR > 3.58) increased significantly in Q4 (OR 1.79 (1.19–2.70)) versus OR 1 in Q1 as did the ORs for diabetes (OR: 2.03 (1.15–3.57) in Q4 versus OR 1 in Q1). We observed the same result when we pooled the participants with prediabetes and diabetes in one group. The OR for MetS also increased significantly across the Sfer Quartiles from OR: 1 in Q1 to 1.92 (1.06–3.02) in Q4 for women and to 2.07 (1.08–3.98) in Q4 in men. Our results suggest the elevated Sfer levels as a potential risk biomarker for dyslipidemia and MetS in adult Qatari men and women, and diabetes and IR in women only.

  8. 8

    المساهمون: Morgan, Sarah [0000-0002-1261-5884], Wang, Bo [0000-0002-3412-3768], Oliver, Dominic [0000-0002-8920-3407], Fusar-Poli, Paolo [0000-0003-3582-6788], Apollo - University of Cambridge Repository, Morgan, Sarah E [0000-0002-1261-5884]

    المصدر: Translational Psychiatry, Vol 11, Iss 1, Pp 1-9 (2021)
    Translational Psychiatry

    الوصف: Funder: RCUK | Medical Research Council (MRC); doi: https://doi.org/10.13039/501100000265Test
    Funder: DH | National Institute for Health Research (NIHR); doi: https://doi.org/10.13039/501100000272Test
    Recent work has suggested that disorganised speech might be a powerful predictor of later psychotic illness in clinical high risk subjects. To that end, several automated measures to quantify disorganisation of transcribed speech have been proposed. However, it remains unclear which measures are most strongly associated with psychosis, how different measures are related to each other and what the best strategies are to collect speech data from participants. Here, we assessed whether twelve automated Natural Language Processing markers could differentiate transcribed speech excerpts from subjects at clinical high risk for psychosis, first episode psychosis patients and healthy control subjects (total N = 54). In-line with previous work, several measures showed significant differences between groups, including semantic coherence, speech graph connectivity and a measure of whether speech was on-topic, the latter of which outperformed the related measure of tangentiality. Most NLP measures examined were only weakly related to each other, suggesting they provide complementary information. Finally, we compared the ability of transcribed speech generated using different tasks to differentiate the groups. Speech generated from picture descriptions of the Thematic Apperception Test and a story re-telling task outperformed free speech, suggesting that choice of speech generation method may be an important consideration. Overall, quantitative speech markers represent a promising direction for future clinical applications.
    SEM was supported by the Accelerate Programme for Scientific Discovery, funded by Schmidt Futures, a Fellowship from The Alan Turing Institute, London, and a Henslow Fellowship at Lucy Cavendish College, University of Cambridge, funded by the Cambridge Philosophical Society. PEV is supported by a fellowship from MQ: Transforming Mental Health (MQF17_24). This work was supported by The Alan Turing Institute under the EPSRC grant EP/N510129/1, the NIHR Cambridge Biomedical Research Centre (BRC-1215-20014), the UK Medical Research Council (MRC) and the National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King's College London.

    وصف الملف: application/vnd.openxmlformats-officedocument.wordprocessingml.document; application/pdf; text/xml

  9. 9

    المصدر: Scientific Reports
    Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)

    الوصف: The aim of this study was to assess the association between dietary inflammatory index (DII) and non-invasive markers of liver status in adults. This cross-sectional study was performed on 8520 adults, recruited in Ravansar Non-Communicable Diseases (RaNCD) cohort study, western Iran. The DII score was calculated based on participants’ dietary intakes obtained from Food Frequency Questionnaire (FFQ). Fatty Liver Index (FLI) score was calculated by anthropometric measurements and some non-invasive markers of liver status. Linear regression models were applied to estimate the associations and adjust the possible confounding factors. A greater DII score was significantly associated with higher energy intake, body mass index (BMI), body fat mass (BFM), blood pressure, and FLI (P

  10. 10

    المصدر: Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
    Scientific Reports

    الوصف: Axonal loss is the main determinant of disease progression in multiple sclerosis (MS). This study aimed to assess the utility of corneal confocal microscopy (CCM) in detecting corneal axonal loss in different courses of MS. The results were confirmed by two independent segmentation methods. 72 subjects (144 eyes) [(clinically isolated syndrome (n = 9); relapsing–remitting MS (n = 20); secondary-progressive MS (n = 22); and age-matched, healthy controls (n = 21)] underwent CCM and assessment of their disability status. Two independent algorithms (ACCMetrics; and Voxeleron deepNerve) were used to quantify corneal nerve fiber density (CNFD) (ACCMetrics only), corneal nerve fiber length (CNFL) and corneal nerve fractal dimension (CNFrD). Data are expressed as mean ± standard deviation with 95% confidence interval (CI). Compared to controls, patients with MS had significantly lower CNFD (34.76 ± 5.57 vs. 19.85 ± 6.75 fibers/mm2, 95% CI − 18.24 to − 11.59, P 2, 95% CI − 8.94 to − 5.77, P 2, 95% CI − 9.55 to − 5.6, P P P