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Methods to extract and analyze fluid from human pluripotent stem cell-derived choroid plexus organoids. Front Mol Neurosci 2024; 16:1243499. [PMID: 38348236 PMCID: PMC10859488 DOI: 10.3389/fnmol.2023.1243499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 12/18/2023] [Indexed: 02/15/2024] Open
Abstract
The choroid plexus (ChP) is a highly vascularized tissue lining the ventricular space of the brain. The ChP generates cerebrospinal fluid (CSF) and forms a protective barrier in the central nervous system (CNS). Recently, a three-dimensional human pluripotent stem cell (hPSC)-derived ChP organoid model has been developed. This model generates cystic structures that are filled with a fluid resembling CSF and are surrounded by an epithelial layer expressing ependymal choroid plexus-specific markers. Here we describe a method to generate these choroid plexus organoids using a commercial kit and methods to extract the CSF-like fluid for use in downstream analysis.
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High-'n'-dry? A comparison of cannabis and alcohol use in drivers presenting to hospital after a vehicular collision. Addiction 2023; 118:1507-1516. [PMID: 36898848 DOI: 10.1111/add.16186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 02/20/2023] [Indexed: 03/12/2023]
Abstract
DESIGN This was a prospective observational study. BACKGROUND AND AIMS The characteristics of cannabis-involved motor vehicle collisions are poorly understood. This study of injured drivers identifies demographic and collision characteristics associated with high tetrahydrocannabinol (THC) concentrations. SETTING The study was conducted in 15 Canadian trauma centres between January 2018 and December 2021. CASES The cases (n = 6956) comprised injured drivers who required blood testing as part of routine trauma care. MEASUREMENTS We quantified whole blood THC and blood alcohol concentration (BAC) and recorded driver sex, age and postal code, time of crash, crash type and injury severity. We defined three driver groups: high THC (THC ≥ 5 ng/ml and BAC = 0), high alcohol (BAC ≥ 0.08% and THC = 0) and THC/BAC-negative (THC = 0 = BAC). We used logistic regression techniques to identify factors associated with group membership. FINDINGS Most injured drivers (70.2%) were THC/BAC-negative; 1274 (18.3%) had THC > 0, including 186 (2.7%) in the high THC group; 1161 (16.7%) had BAC > 0, including 606 (8.7%) in the high BAC group. Males and drivers aged less than 45 years had higher adjusted odds of being in the high THC group (versus the THC/BAC-negative group). Importantly, 4.6% of drivers aged less than 19 years had THC ≥ 5 ng/ml, and drivers aged less than 19 years had higher unadjusted odds of being in the high THC group than drivers aged 45-54 years. Males, drivers aged 19-44 years, rural drivers, seriously injured drivers and drivers injured in single-vehicle, night-time or weekend collisions had higher adjusted odds ratios (aORs) for being in the high alcohol group (versus THC/BAC-negative). Drivers aged less than 35 or more than 65 years and drivers involved in multi-vehicle, daytime or weekday collisions had higher adjusted odds for being in the high THC group (versus the high BAC group). CONCLUSIONS In Canada, risk factors for cannabis-related motor vehicle collisions appear to differ from those for alcohol-related motor vehicle collisions. The collision factors associated with alcohol (single-vehicle, night-time, weekend, rural, serious injury) are not associated with cannabis-related collisions. Demographic factors (young drivers, male drivers) are associated with both alcohol and cannabis-related collisions, but are more strongly associated with cannabis-related collisions.
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The amino acid sensor GCN2 suppresses Terminal Oligopyrimidine (TOP) mRNA translation via La-related Protein 1 (LARP1). J Biol Chem 2022; 298:102277. [PMID: 35863436 PMCID: PMC9396407 DOI: 10.1016/j.jbc.2022.102277] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 07/10/2022] [Accepted: 07/11/2022] [Indexed: 11/16/2022] Open
Abstract
La-related protein 1 (LARP1) has been identified as a key translational inhibitor of terminal oligopyrimidine (TOP) mRNAs downstream of the nutrient sensing protein kinase complex, mTORC1. LARP1 exerts this inhibitory effect on TOP mRNA translation by binding to the mRNA cap and the adjacent 5′TOP motif, resulting in the displacement of the cap-binding protein eIF4E from TOP mRNAs. However, the involvement of additional signaling pathway in regulating LARP1-mediated inhibition of TOP mRNA translation is largely unexplored. In the present study, we identify a second nutrient sensing kinase GCN2 that converges on LARP1 to control TOP mRNA translation. Using chromatin-immunoprecipitation followed by massive parallel sequencing (ChIP-seq) analysis of activating transcription factor 4 (ATF4), an effector of GCN2 in nutrient stress conditions, in WT and GCN2 KO mouse embryonic fibroblasts, we determined that LARP1 is a GCN2-dependent transcriptional target of ATF4. Moreover, we identified GCN1, a GCN2 activator, participates in a complex with LARP1 on stalled ribosomes, suggesting a role for GCN1 in LARP1-mediated translation inhibition in response to ribosome stalling. Therefore, our data suggest that the GCN2 pathway controls LARP1 activity via two mechanisms: ATF4-dependent transcriptional induction of LARP1 mRNA and GCN1-mediated recruitment of LARP1 to stalled ribosomes.
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Description des séquelles à 3 mois d’une COVID grave chez une population jeune et comorbide. Infect Dis Now 2021. [PMCID: PMC8327630 DOI: 10.1016/j.idnow.2021.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Introduction Le suivi des séquelles de patients guéris d’une COVID grave s’est organisé dans de nombreux centres. L’épidémie dans notre département a sévèrement touché un cluster urbain composé à 90 % d’une population gitane jeune et comorbide avec un taux de prise en charge en réanimation élevé et un faible taux de mortalité (respectivement 34 % contre 25 % et 7,2 % contre 10,2 % en France à cette période). L’objectif de cette étude est d’évaluer si les séquelles à 3 mois dans une telle cohorte sont différentes de celles retrouvées dans la littérature. Matériels et méthodes Étude rétrospective observationnelle monocentrique à partir des données du dossier médical informatisé. Notre centre a organisé le suivi à 3 mois des patients de la première vague guéris d’une COVID grave : évaluation clinicobiologique, tests cognitif (Montreal Cognitive Assessment) et d’anxiété (Hospital Anxiety and Depression Scale), suivi en médecine du sport avec test de marche 6 min, scanner pulmonaire, explorations fonctionnelles respiratoires (EFR), ECG et échographie cardiaque (ETT). Résultats Il a été inclus 51 patients (26 femmes), âge moyen 58 ans, 20 (39,2 %) avaient été intubés, 8 avaient eu de la VNI ou de l’optiflow. Les comorbidités les plus fréquentes étaient l’obésité (IMC > 30 kg/m2) 33/51 (64,9 %), le diabète 22/51 (43,1 %) et l’HTA 22/51 (43,1 %). Au moins 1 symptôme persistait pour 92 % (47/51) des patients: asthénie 74,5 % (38/51), dyspnée 66 % (34/51), prise de poids 39,2 % (20/51). Un état d’anxiété était relevé pour près de 51 % des patients (26/51). La sérologie covid19 était positive pour 92 % des patients (46/50). Le suivi par scanner montrait la persistance d’anomalies pour 33/51 patients (64,7 %) dont 45,4 % d’images en verre dépoli (15/33) et 21,2 % (7/33) d’images de fibrose pulmonaire. Des EFR ont été réalisées pour 48 patients avec mesure de DLCO pour 41 d’entre eux. On retrouvait 10 (20,8 %) syndromes restrictifs (tous avaient des anomalies au scanner) et 19 (46,3 %) troubles de la diffusion du CO2 (dont 13/19 avec anomalies au scanner et 13/19 avec dyspnée). Le périmètre de marche moyen est de 405 m (55–675 m) soit 62 % de la distance théorique, avec 11,1 % (5) de désaturation < 94 %. Tous ont eu un ECG. Des anomalies ont été retrouvées chez 17 patients (10 troubles de la conduction non graves, 7 troubles de la repolarisation). L’ETT réalisée pour 34 patients montrait 4 (11,8 %) dysfonctions ventriculaires (FEVG < 50 %), 6 signes de coronaropathie. Conclusion En comparaison avec la littérature, notre cohorte est définie par des patients avec un IMC plus élevé, une forte prévalence de diabète, un fort taux de COVID critiques. Le taux d’anxiété et de symptômes persistants est plus élevé. La prévalence des anomalies au scanner et du FEVG est similaire. Pour les EFR, les données de la littérature sont variables. Le périmètre de marche de notre cohorte est plus faible. Ces résultats suggèrent une similarité des données objectives avec celles du reste de la population générale mais une augmentation des symptômes subjectifs qui peut être liée à des facteurs confondants tels que l’obésité, les habitudes sédentaires de la population étudiée. Une prise en charge post COVID spécifique semble donc pertinente pour limiter l’impact des séquelles dans cette population.
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RNA-seq analysis of the mantle transcriptome from Mytilus edulis during a seasonal spawning event in deep and shallow water culture sites on the northeast coast of Newfoundland, Canada. Mar Genomics 2021; 60:100865. [PMID: 33933383 DOI: 10.1016/j.margen.2021.100865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 02/23/2021] [Accepted: 03/15/2021] [Indexed: 11/29/2022]
Abstract
The blue mussel (Mytilus edulis) has global commercial and ecological importance both in wild and cultured conditions. However there is a qualitative and quantitative lack of knowledge of the molecular mechanisms associated with its reproductive physiology, especially with reference to environmental interactions. Here we initiated a transcriptomic analysis (RNA-sequencing (RNA-seq)) of the mantle from both sexes sampled during a seasonal spawning event and from two culture depths (shallow-5 m; deep- 15 m). Mantle libraries were produced from 3 males and 3 females sampled from each of two shallow sites and two deep sites for a total of 12 replicate male and 12 replicate female libraries (24 total libraries). Overall a total of 2.3 billion raw 100 base reads with an average of 96.5 million reads/library were obtained and assembled into 296,118 transcripts with an average length of 568 bp. Overall, 315 transcripts from male libraries and 25 from female libraries were found to be upregulated in deep water as compared to shallow (edgeR adjusted p value ≤ 0.05). Conversely, 126 transcripts from male libraries and 135 from female libraries were found to be significantly downregulated at the same depth. Thirteen transcripts were selected for qPCR validation based on importance in reproduction, antimicrobial defense and metabolism. Of these, 9 RNA-seq identified transcripts were shown by qPCR to be differentially expressed between groups: 2 were upregulated in deep compared with shallow water (dhx38, mt-co1), 2 were upregulated for female compared with male mantle (pias2, mapkap1) and 6 genes (fndc3a, acbd3, klhl10, ccnb3, armc4, mt-co1) showed to be upregulated in males compared to females. The majority of qPCR studied transcripts were identified as involved in gamete development based on the UniProt database. This study further characterizes the importance of the mantle transcriptome during reproductive activities of M. edulis.
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Altered differentiation is central to HIV-specific CD4 + T cell dysfunction in progressive disease. Nat Immunol 2019; 20:1059-1070. [PMID: 31308541 PMCID: PMC6642691 DOI: 10.1038/s41590-019-0418-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 05/03/2019] [Indexed: 12/19/2022]
Abstract
Dysfunction of virus-specific CD4+ T cells in chronic human infections is poorly understood. We performed genome-wide transcriptional analyses and functional assays of CD4+ T cells specific for human immunodeficiency virus (HIV) from HIV-infected people before and after initiation of antiretroviral therapy (ART). A follicular helper T cell (TFH cell)-like profile characterized HIV-specific CD4+ T cells in viremic infection. HIV-specific CD4+ T cells from people spontaneously controlling the virus (elite controllers) robustly expressed genes associated with the TH1, TH17 and TH22 subsets of helper T cells. Viral suppression by ART resulted in a distinct transcriptional landscape, with a reduction in the expression of genes associated with TFH cells, but persistently low expression of genes associated with TH1, TH17 and TH22 cells compared to the elite controller profile. Thus, altered differentiation is central to the impairment of HIV-specific CD4+ T cells and involves both gain of function and loss of function.
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GenPipes: an open-source framework for distributed and scalable genomic analyses. Gigascience 2019; 8:giz037. [PMID: 31185495 PMCID: PMC6559338 DOI: 10.1093/gigascience/giz037] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 09/28/2018] [Accepted: 03/10/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND With the decreasing cost of sequencing and the rapid developments in genomics technologies and protocols, the need for validated bioinformatics software that enables efficient large-scale data processing is growing. FINDINGS Here we present GenPipes, a flexible Python-based framework that facilitates the development and deployment of multi-step workflows optimized for high-performance computing clusters and the cloud. GenPipes already implements 12 validated and scalable pipelines for various genomics applications, including RNA sequencing, chromatin immunoprecipitation sequencing, DNA sequencing, methylation sequencing, Hi-C, capture Hi-C, metagenomics, and Pacific Biosciences long-read assembly. The software is available under a GPLv3 open source license and is continuously updated to follow recent advances in genomics and bioinformatics. The framework has already been configured on several servers, and a Docker image is also available to facilitate additional installations. CONCLUSIONS GenPipes offers genomics researchers a simple method to analyze different types of data, customizable to their needs and resources, as well as the flexibility to create their own workflows.
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Mise en place de séances de vaccination hépatite A de la population homosexuelle masculine au sein d’un CeGIDD dans un contexte épidémique. Med Mal Infect 2019. [DOI: 10.1016/j.medmal.2019.04.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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O002: Increased incidence of cancer in the follow-up of obstetric antiphospholipid syndrome: the NOHA-K observational study. Thromb Res 2019. [DOI: 10.1016/s0049-3848(19)30082-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Prognostic significance of central venous-to-arterial carbon dioxide difference during the first 24 hours of septic shock in patients with and without impaired cardiac function. Br J Anaesth 2018; 119:239-248. [PMID: 28854537 DOI: 10.1093/bja/aex131] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2017] [Indexed: 12/24/2022] Open
Abstract
Objective To investigate the prognostic significance of central venous-to-arterial carbon dioxide difference (cv-art CO 2 gap) during septic shock in patients with and without impaired cardiac function. Methods We performed a prospective cohort study in 10 French intensive care units. Patients suffering from septic shock were assigned to the impaired cardiac function group ('cardiac group', n =123) if they had atrial fibrillation (AF) and/or left ventricular ejection fraction (LVEF) <50% at study entry and to the non-cardiac group ( n =240) otherwise. Results Central venous and arterial blood gases were sampled every 6 h during the first 24 h to calculate cv-art CO 2 gap. Patients in the cardiac group had a higher cv-art CO 2 gap [at study entry and 6 and 12 h (all P <0.02)] than the non-cardiac group. Patients in the cardiac group with a cv-art CO 2 gap >0.9 kPa at 12 h had a higher risk of day 28 mortality (hazard ratio=3.18; P =0.0049). Among the 59 patients in the cardiac group with mean arterial pressure (MAP) ≥65 mm Hg, central venous pressure (CVP) ≥8 mm Hg and central venous oxygen saturation (ScvO 2 ) ≥70% at 12 h, those with a high cv-art CO 2 gap (>0.9 kPa; n =19) had a higher day 28 mortality (37% vs. 13%; P =0.042). In the non-cardiac group, a high cv-art CO 2 gap was not linked to a higher risk of day 28 death, whatever the threshold value of the cv-art CO 2 gap. Conclusion Patients with septic shock and with AF and/or low LVEF were more prone to a persistent high cv-art CO 2 gap, even when initial resuscitation succeeded in normalizing MAP, CVP, and ScvO 2 . In these patients, a persistent high cv-art CO 2 gap at 12 h was significantly associated with higher day 28 mortality.
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1.10-P8Difficult patient-doctor encounters in a Swiss University Outpatient Clinic working with migrants and vulnerable populations: predicting factors. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky048.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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1.10-P22Improving medical doctors’ psychosocial skills after working in a Swiss outpatient clinic with high rates of migrants and vulnerable patients. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky048.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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OC-2a: Novel genes and mutations in patients with recurrent spontaneous abortion. Thromb Res 2017. [DOI: 10.1016/s0049-3848(17)30082-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Enhanced complexity of optical chaos in a laser diode with phase-conjugate feedback. OPTICS LETTERS 2016; 41:4637-4640. [PMID: 28005855 DOI: 10.1364/ol.41.004637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate numerically that a semiconductor laser subjected to phase-conjugate feedback (PCF) can exhibit an enhancement in the complexity of chaos by comparison to conventional optical feedback. Using quantifiers from spectral analysis and information theory, we demonstrate that under similar parametric conditions, PCF exhibits a larger chaotic bandwidth and higher spectral flatness and statistical complexity. These properties are of utmost importance for applications in secure communications and random number generation.
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Molecular quantification of bacteria from respiratory samples in patients with suspected ventilator-associated pneumonia. Clin Microbiol Infect 2016; 22:812.e1-812.e7. [DOI: 10.1016/j.cmi.2016.06.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/20/2016] [Accepted: 06/21/2016] [Indexed: 11/28/2022]
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Genomic characteristics of miscarriage copy number variants. Mol Hum Reprod 2015; 21:655-61. [PMID: 26071097 DOI: 10.1093/molehr/gav030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/09/2015] [Indexed: 01/08/2023] Open
Abstract
Studies of copy number variants (CNVs) in miscarriages are rare in comparison to post-natal cases with developmental abnormalities. The overall characteristics of miscarriage CNVs (size, gene content and function) are therefore largely unexplored. Our goal was to assess and compare the characteristics of CNVs identified in 101 euploid miscarriages from four high-resolution array studies that documented both common miscarriage CNVs (i.e. CNVs found in controls from the Database of Genomic Variants, DGV) and rare miscarriage CNVs (not reported in DGV). Our miscarriage analysis included 24 rare CNVs with 93 genes, and 372 common CNVs (merged into 119 common CNV regions; CNVRs) with 354 genes. The rare and common CNVs were comparable in size (median size of ∼ 0.16 and 0.14 Mb, respectively); however, rare CNVs showed a significantly higher gene density, with 56 genes/Mb in rare and 24 genes/Mb in common CNVs (P = 0.03). Rare CNVs also had two times more genes with mouse knock-out models which were reported for 42% of rare and 19% of common CNV genes. No specific pathway enrichment was noted for 24 rare CNV genes, but common CNV genes showed significant enrichment in genes from immune-response related pathways and pregnancy/reproduction-related biological processes. Our analysis of CNVs from euploid miscarriages suggests that both rare and common CNVs could have a role in miscarriage by impacting pregnancy-related genes or pathways. Cataloguing of all CNVs and detailed description of their characteristics (e.g. gene content, genomic breakpoints) is desirable in the future for better understanding of their relevance to pregnancy loss.
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Copy number variants (CNVs) analysis in a deeply phenotyped cohort of individuals with intellectual disability (ID). BMC MEDICAL GENETICS 2014; 15:82. [PMID: 25030379 PMCID: PMC4107469 DOI: 10.1186/1471-2350-15-82] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 07/03/2014] [Indexed: 01/13/2023]
Abstract
Background DNA copy number variants (CNVs) are found in 15% of subjects with ID but their association with phenotypic abnormalities has been predominantly studied in smaller cohorts of subjects with detailed yet non-systematically categorized phenotypes, or larger cohorts (thousands of cases) with smaller number of generalized phenotypes. Methods We evaluated the association of de novo, familial and common CNVs detected in 78 ID subjects with phenotypic abnormalities classified using the Winter-Baraitser Dysmorphology Database (WBDD) (formerly the London Dysmorphology Database). Terminology for 34 primary (coarse) and 169 secondary (fine) phenotype features were used to categorize the abnormal phenotypes and determine the prevalence of each phenotype in patients grouped by the type of CNV they had. Results In our cohort more than 50% of cases had abnormalities in primary categories related to head (cranium, forehead, ears, eye globes, eye associated structures, nose) as well as hands and feet. The median number of primary and secondary abnormalities was 12 and 18 per subject, respectively, indicating that the cohort consisted of subjects with a high number of phenotypic abnormalities (median De Vries score for the cohort was 5). The prevalence of each phenotypic abnormality was comparable in patients with de novo or familial CNVs in comparison to those with only common CNVs, although a trend for increased frequency of cranial and forehead abnormalities was noted in subjects with rare de novo and familial CNVs. Two clusters of subjects were identified based on the prevalence of each fine phenotypic feature, with an average of 28.3 and 13.5 abnormal phenotypes/subject in the two clusters respectively (P < 0.05). Conclusions Our study is a rare example of using standardized, deep morphologic phenotype clustering with phenotype/CNV correlation in a cohort of subjects with ID. The composition of the cohort inevitably influences the phenotype/genotype association, and our studies show that the influence of the de novo CNVs on the phenotype is less obvious in cohorts consisting of subjects with a high number of phenotypic abnormalities. The outcome of phenotype/genotype analysis also depends on the choice of phenotypes assessed and standardized phenotyping is required to minimize variability.
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Physical random bit generation from chaotic solitary laser diode. OPTICS EXPRESS 2014; 22:17271-17280. [PMID: 25090541 DOI: 10.1364/oe.22.017271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We demonstrate the physical generation of random bits at high bit rates (> 100 Gb/s) using optical chaos from a solitary laser diode and therefore without the complex addition of either external optical feedback or injection. This striking result is obtained despite the low dimension and relatively small bandwidth of the laser chaos, i.e. two characteristics that have been so far considered as limiting the performances of optical chaos-based applications. We unambiguously attribute the successful randomness at high speed to the physics of the laser chaotic polarization dynamics and the resulting growth rate of the dynamical entropy.
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Bistability of time-periodic polarization dynamics in a free-running VCSEL. OPTICS EXPRESS 2014; 22:6772-6777. [PMID: 24664025 DOI: 10.1364/oe.22.006772] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report experimentally a bistability between two limit cycles (i.e. time-periodic dynamics) in a free-running vertical-cavity surface-emitting laser. The two limit cycles originate from a bifurcation on two elliptically polarized states which exhibit a small frequency difference and whose main axes are symmetrical with respect to the linear polarization eigenaxes at threshold. We demonstrate theoretically that this peculiar behavior can be explained in the framework of the spin-flip model model by taking into account a small misalignment between the phase and amplitude anisotropies.
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Pulmonary toxicity associated with the use of lenalidomide: Case report of late-onset acute respiratory distress syndrome and literature review. Heart Lung 2014; 43:120-3. [DOI: 10.1016/j.hrtlng.2013.11.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/14/2013] [Accepted: 11/20/2013] [Indexed: 12/23/2022]
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Abstract
BACKGROUND Since the first description of Hashimoto's Encephalitis (HE) in 1966 by Lord Brain, the number of reported cases has continued to increase. In addition, cases of status epilepticus have been reported, suggesting a role for intensive care unit (ICU) practitioners in taking care of patients with HE. METHODS A retrospective cohort study in ICU patients with HE was performed at the University Hospital of Tours, France. RESULTS Eight HE cases were admitted to the ICU between 1/1/2000 and 1/1/2012. Herein, we describe the characteristics of the patients, with an emphasis on ICU disease management and its outcome. CONCLUSION ICU practitioners should be aware of this disease, since it can include life-threatening presentations.
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L’encéphalopathie d’Hashimoto en réanimation : quand doit-on l’évoquer ? MEDECINE INTENSIVE REANIMATION 2013. [DOI: 10.1007/s13546-013-0729-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Thrombopénie induite par l’héparine en dialyse : diagnostic et prise en charge. Nephrol Ther 2013. [DOI: 10.1016/j.nephro.2013.07.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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miRNA and miRNA target genes in copy number variations occurring in individuals with intellectual disability. BMC Genomics 2013; 14:544. [PMID: 23937676 PMCID: PMC3750877 DOI: 10.1186/1471-2164-14-544] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 08/06/2013] [Indexed: 12/20/2022] Open
Abstract
Background MicroRNAs (miRNAs) are a family of short, non-coding RNAs modulating expression of human protein coding genes (miRNA target genes). Their dysfunction is associated with many human diseases, including neurodevelopmental disorders. It has been recently shown that genomic copy number variations (CNVs) can cause aberrant expression of integral miRNAs and their target genes, and contribute to intellectual disability (ID). Results To better understand the CNV-miRNA relationship in ID, we investigated the prevalence and function of miRNAs and miRNA target genes in five groups of CNVs. Three groups of CNVs were from 213 probands with ID (24 de novo CNVs, 46 familial and 216 common CNVs), one group of CNVs was from a cohort of 32 cognitively normal subjects (67 CNVs) and one group of CNVs represented 40 ID related syndromic regions listed in DECIPHER (30 CNVs) which served as positive controls for CNVs causing or predisposing to ID. Our results show that 1). The number of miRNAs is significantly higher in de novo or DECIPHER CNVs than in familial or common CNV subgroups (P < 0.01). 2). miRNAs with brain related functions are more prevalent in de novo CNV groups compared to common CNV groups. 3). More miRNA target genes are found in de novo, familial and DECIPHER CNVs than in the common CNV subgroup (P < 0.05). 4). The MAPK signaling cascade is found to be enriched among the miRNA target genes from de novo and DECIPHER CNV subgroups. Conclusions Our findings reveal an increase in miRNA and miRNA target gene content in de novo versus common CNVs in subjects with ID. Their expression profile and participation in pathways support a possible role of miRNA copy number change in cognition and/or CNV-mediated developmental delay. Systematic analysis of expression/function of miRNAs in addition to coding genes integral to CNVs could uncover new causes of ID.
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Potential role of Alternaria and Cladosporium species in canine lymphoplasmacytic rhinitis. J Small Anim Pract 2013; 54:179-83. [PMID: 23496099 DOI: 10.1111/jsap.12049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To evaluate the possible role of Alternaria and Cladosporium species in the pathogenesis of canine lymphoplasmacytic rhinitis by comparing the amount of specific fungal DNA in nasal mucosal biopsies between dogs without nasal neoplasia and those with lymphoplasmacytic rhinitis or nasal neoplasia. METHODS Quantitative real-time polymerase chain reaction (qPCR) assays detecting DNA from Alternaria and Cladosporium fungi were applied to nasal mucosal biopsies collected from dogs with lymphoplasmacytic rhinitis (n = 8), dogs with nasal neoplasia (n = 10) and control animals (n = 10). A copy number for each sample was calculated using a standard curve of known copy number and differences amongst groups were assessed using Kruskal-Wallis tests. RESULTS No significant difference was found between the groups. Low levels of Alternaria DNA (10-100 copies/PCR) were detected in one sample; very low levels of DNA (<10 copies/qPCR) were detected in 6 samples, and 21 samples were negative. Low levels of Cladosporium DNA were detected in 2 samples; very low levels of DNA in 18; and 8 were negative. CLINICAL SIGNIFICANCE Results of this study reveal that Alternaria and Cladosporium species are part of the canine nasal flora, and that these fungi are probably not involved in the pathogenesis of lymphoplasmacytic rhinitis.
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P-003 Plasma free DNA and circulating nucleosomes: Preliminary data in normal and pathologic pregnancies. Thromb Res 2013. [DOI: 10.1016/s0049-3848(13)70049-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Predictive value of glial fibrillary acidic protein for prognosis in patients with moderate and severe traumatic brain injury: a systematic review and meta-analysis. Crit Care 2012. [PMCID: PMC3363716 DOI: 10.1186/cc10905] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Predictive value of neuron-specific enolase following moderate and severe traumatic brain injury: a systematic review and meta-analysis. Crit Care 2012. [PMCID: PMC3363729 DOI: 10.1186/cc10918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Brachial cuff measurements of blood pressure during passive leg raising for fluid responsiveness prediction. ACTA ACUST UNITED AC 2012; 31:e67-72. [PMID: 22464162 DOI: 10.1016/j.annfar.2012.01.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 01/10/2012] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The passive leg raising maneuver (PLR) for fluid responsiveness testing relies on cardiac output (CO) measurements or invasive measurements of arterial pressure (AP) whereas the initial hemodynamic management during shock is often based solely on brachial cuff measurements. We assessed PLR-induced changes in noninvasive oscillometric readings to predict fluid responsiveness. STUDY DESIGN Multicentre interventional study. PATIENTS AND METHODS In ICU sedated patients with circulatory failure, AP (invasive and noninvasive readings) and CO measurements were performed before, during PLR (trunk supine, not modified) and after 500-mL volume expansion. Areas under the ROC curves (AUC) were determined for fluid responsiveness (>10% volume expansion-induced increase in CO) prediction. RESULTS In 112 patients (19% with arrhythmia), changes in noninvasive systolic AP during PLR (noninvasiveΔ(PLR)SAP) only predicted fluid responsiveness (cutoff 17%, n=21, positive likelihood ratio [LR] of 26 [18-38]), not unresponsiveness. If PLR-induced change in central venous pressure (CVP) was at least of 2 mm Hg (n=60), suggesting that PLR succeeded in altering cardiac preload, noninvasiveΔ(PLR)SAP performance was good: AUC of 0.94 [0.85-0.98], positive and negative LRs of 5.7 [4.6-6.8] and 0.07 [0.009-0.5], respectively, for a cutoff of 9%. Of note, invasive AP-derived indices did not outperform noninvasiveΔ(PLR)SAP. CONCLUSION Regardless of CVP (i.e., during "blind PLR"), noninvasiveΔ(PLR)SAP more than 17% reliably identified fluid responders. During "CVP-guided PLR", in case of sufficient change in CVP, noninvasiveΔ(PLR)SAP performed better (cutoff of 9%). These findings, in sedated patients who had already undergone volume expansion and/or catecholamines, have to be verified during the early phase of circulatory failure (before an arterial line and/or a CO measuring device is placed).
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Strategies for the withdrawal of extracorporeal membrane oxygenation for severe acute respiratory failure support: a new challenge? Anaesth Intensive Care 2012; 40:359. [PMID: 22417044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Comments on: "Pyoderma Gangrenosum following an orthopedic surgical procedure" by E. de Thomasson, and I. Caux, published in Orthop Traumatol Surg Res 2010;96:600-602. Orthop Traumatol Surg Res 2011; 97:890-1; author reply 892. [PMID: 22100177 DOI: 10.1016/j.otsr.2011.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Accepted: 09/15/2011] [Indexed: 02/02/2023]
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ITER In-Cryostat inspection and repair feasibility studies. FUSION ENGINEERING AND DESIGN 2011. [DOI: 10.1016/j.fusengdes.2011.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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[A Touraine cluster of central nervous system listeriosis]. Med Mal Infect 2011; 41:613-6. [PMID: 21907514 DOI: 10.1016/j.medmal.2011.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 05/26/2011] [Accepted: 07/22/2011] [Indexed: 11/16/2022]
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Understanding the impact of 1q21.1 copy number variant. Orphanet J Rare Dis 2011; 6:54. [PMID: 21824431 PMCID: PMC3180300 DOI: 10.1186/1750-1172-6-54] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Accepted: 08/08/2011] [Indexed: 01/10/2023] Open
Abstract
Background 1q21.1 Copy Number Variant (CNV) is associated with a highly variable phenotype ranging from congenital anomalies, learning deficits/intellectual disability (ID), to a normal phenotype. Hence, the clinical significance of this CNV can be difficult to evaluate. Here we described the consequences of the 1q21.1 CNV on genome-wide gene expression and function of selected candidate genes within 1q21.1 using cell lines from clinically well described subjects. Methods and Results Eight subjects from 3 families were included in the study: six with a 1q21.1 deletion and two with a 1q21.1 duplication. High resolution Affymetrix 2.7M array was used to refine the 1q21.1 CNV breakpoints and exclude the presence of secondary CNVs of pathogenic relevance. Whole genome expression profiling, studied in lymphoblast cell lines (LBCs) from 5 subjects, showed enrichment of genes from 1q21.1 in the top 100 genes ranked based on correlation of expression with 1q21.1 copy number. The function of two top genes from 1q21.1, CHD1L/ALC1 and PRKAB2, was studied in detail in LBCs from a deletion and a duplication carrier. CHD1L/ALC1 is an enzyme with a role in chromatin modification and DNA damage response while PRKAB2 is a member of the AMP kinase complex, which senses and maintains systemic and cellular energy balance. The protein levels for CHD1L/ALC1 and PRKAB2 were changed in concordance with their copy number in both LBCs. A defect in chromatin remodeling was documented based on impaired decatenation (chromatid untangling) checkpoint (DCC) in both LBCs. This defect, reproduced by CHD1L/ALC1 siRNA, identifies a new role of CHD1L/ALC1 in DCC. Both LBCs also showed elevated levels of micronuclei following treatment with a Topoisomerase II inhibitor suggesting increased DNA breaks. AMP kinase function, specifically in the deletion containing LBCs, was attenuated. Conclusion Our studies are unique as they show for the first time that the 1q21.1 CNV not only causes changes in the expression of its key integral genes, associated with changes at the protein level, but also results in changes in their known function, in the case of AMPK, and newly identified function such as DCC activation in the case of CHD1L/ALC1. Our results support the use of patient lymphoblasts for dissecting the functional sequelae of genes integral to CNVs in carrier cell lines, ultimately enhancing understanding of biological processes which may contribute to the clinical phenotype.
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P.38 Genetic variability of LXRbeta gene might contribute to preeclampsia. Thromb Res 2011. [DOI: 10.1016/s0049-3848(11)70093-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Brachial cuff measurements for fluid responsiveness prediction in the critically ill. Crit Care 2011. [PMCID: PMC3061703 DOI: 10.1186/cc9493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Paternal endothelial protein C receptor 219Gly variant as a mild and limited risk factor for deep vein thrombosis during pregnancy. J Thromb Haemost 2010; 8:707-13. [PMID: 20141580 DOI: 10.1111/j.1538-7836.2010.03770.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Half of all venous thromboembolism (VTE) cases during pregnancy are associated with a maternal thrombophilia. The influence of paternal genotype on the placenta and in the genesis of VTE has not been described. OBJECTIVES To determine if the maternal and paternal Ser219Gly dimorphism of the endothelial protein C receptor (EPCR), evaluated through detection of the PROCR 6936G allele, is a risk factor for VTE during pregnancy. METHODS Using a case-control study nested in the NOHA first cohort of primigravidae, 66 patient couples with a first episode of gestational VTE and randomly selected non-thrombotic control couples were investigated. For each couple, factor V gene (F5) G1691A, factor II gene (F2) G20210A, factor XII gene (F12) C46T and PROCR A6936G polymorphisms were determined. RESULTS Only maternal F5 1691A, F2 20210A and F12 46T alleles were independently associated with iliac and infra-iliac deep vein thromboses (DVT). The maternal PROCR 6936G allele was a mild risk factor for iliac DVT (OR = 5.5 [2.3-13.0]). The paternal PROCR 6936G allele was also a mild independent risk factor for iliac DVT (OR = 2.6 [1.1-6.2]) and only during pregnancy (rather than postpartum) among maternal carriers of the F5 1691A allele (OR = 77.6 [4.2 to > 999.9]). CONCLUSIONS The paternal PROCR 6936G allele could be a risk factor for maternal iliac DVT. Its impact was milder than the F5 1691A and F2 20210A polymorphisms in mothers. We hypothesize that the prothrombotic effect of the paternal PROCR 6936G allele is localized. Therefore, DVT during pregnancy may be influenced by trophoblastic cell-surface proteins inherited from both maternal and paternal alleles.
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Neuropsychiatric disorders revealing primary antiphospholipid syndrome in an elderly patient. Neurology 2009; 72:1362-3. [PMID: 19365060 DOI: 10.1212/wnl.0b013e3181a0fd69] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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O11 Some haemostasis variables at the end of the population distributions are risk factors for severe postpartum haemorrhages. Thromb Res 2009. [DOI: 10.1016/s0049-3848(09)70036-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Some hemostasis variables at the end of the population distributions are risk factors for severe postpartum hemorrhages. J Thromb Haemost 2008; 6:2067-74. [PMID: 18826390 DOI: 10.1111/j.1538-7836.2008.03168.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Severe postpartum hemorrhages (PPH) represent a significant cause of maternal morbidity/mortality, but little is known about its hemostasis-related risk factors. Among the 32 463 women enrolled in the NOHA First cohort, 317 developed severe PPH (S-PPH group), 1269 non-severe PPH (NS-PPH group) and the remaining individuals were considered as control women (C group). METHODS We performed a case-control study, including 317 triplets of women allocated from the three groups that shared the same clinical characteristics as the S-PPH group. RESULTS From values obtained 6-9 months after delivery, low (but not-deficient) levels of fibrinogen, von Willebrand factor (VWF) antigen, factor (F) XI, platelet CD42b, TRAP-induced increase of platelet CD41a and high values of serum residual prothrombin activity or closure aperture times using the collagen-ADP cartridge on the PFA-100 system, and blood group O, were independently associated with a significant risk of severe PPH. Being positive for at least two of these eight variables was found in 1.6%, 3.5% and 20.8% of the women from the C, the NS-PPH and the S-PPH groups, respectively, the odds ratio for S-PPH in such a case being 16.4, 95%CI (6.5-41), P < 0.0001. CONCLUSIONS Women with some hemostasis-related variables at the low or high end of the population distributions are prone to the severe forms of PPH. Clinical trials will allow us to know if acting on these risk factors can lower the clinical severity of PPH.
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Aérosols en ventilation mécanique chez l’adulte. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)73810-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Aérosols en ventilation mécanique chez l’adulte. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)73817-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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In support of the revised World Health Organization diagnostic criteria for essential thrombocythemia: JAK2 V617F and premature myocardial infarction. J Thromb Haemost 2008; 6:206-7. [PMID: 17973973 DOI: 10.1111/j.1538-7836.2007.02822.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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095 Influence of jet nebulization on ventilatory parameters during mechanical ventilation. Rev Mal Respir 2007. [DOI: 10.1016/s0761-8425(07)74386-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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ASYMPTOMATIC CARRIAGE OF THE JAK2V617F MUTATION IS ASSOCIATED WITH UNEXPLAINED EMBRYONIC AND FOETAL LOSS DURING THE FIRST PREGNANCY. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb00877.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Homozygosity for the C46T polymorphism of the F12 gene is a risk factor for venous thrombosis during the first pregnancy. J Thromb Haemost 2007; 5:700-7. [PMID: 17408404 DOI: 10.1111/j.1538-7836.2007.02423.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND A first thromboembolic event during pregnancy and puerperium is predisposed to by polymorphisms G1691A in the factor V gene (F5) (F5G1691A) and G20210A in the prothrombin gene (F2) (F2G20210A). OBJECTIVES To study another potentially frequent thrombogenic polymorphism, C46T in the factor XII gene (F12) (F12C46T). PATIENTS AND METHODS The 32 463 previously asymptomatic women included in the NOHA First cohort in their first pregnancy were investigated for these three polymorphisms. No other constitutional or acquired thrombophilic risk factor was studied. RESULTS The overall incidence--absolute risk--of venous thromboembolic events (VTE) was 127 per 100,000 woman-years and was reduced to 22 per 100,000 women-years in women negative for the three polymorphisms (P < 0.0001). Homozygosity for F12C46T was associated with a significant relative risk (RR) of VTE [RR: 5.99, 95% confidence interval (95% CI): 2.1-17.3, P = 0.001], as was heterozygosity for F5G1691A (RR: 18.7, 95% CI: 8.3-42, P < 0.0001), heterozygosity for F2G20210A (RR: 14.3, 95% CI: 6.2-33.2, P < 0.0001), maternal age (RR: 1.18, 95% CI: 1.07-1.29, P = 0.0006), maternal body mass index (RR: 1.31, 95% CI: 1.11-1.55, P = 0.002), conceptus weight (percentiles adjusted for term of delivery; RR: 0.90, 95% CI: 0.88-0.93, P < 0.0001) and pre-eclampsia (RR: 3.03, 95% CI: 1.06-8.69, P = 0.039). CONCLUSIONS Homozygosity for the C46T polymorphism of the F12 gene is associated with venous thrombosis during the first pregnancy/puerperium in previously asymptomatic women.
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48 The EPCR Ser219Gly polymorphism is associated with the risk of unexplained foetal death in couples in the NOHA First matched case-control study. Thromb Res 2007. [DOI: 10.1016/s0049-3848(07)70093-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Factor V Leiden and prothrombin G20210A polymorphisms as risk factors for miscarriage during a first intended pregnancy: the matched case-control 'NOHA first' study. J Thromb Haemost 2005; 3:2178-84. [PMID: 16194196 DOI: 10.1111/j.1538-7836.2005.01581.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Factor V Leiden (FVL) and prothrombin G20210A (FIIG20210A) mutations are associated with a higher risk of miscarriage: we sought to understand whether this association differs by clinical time of unexplained miscarriage, and by ethnic origin, among women with no previous thrombotic episode, during the first intended pregnancy. We performed a case-control study nested in a cohort of 32 683 women. We analyzed 3496 pairs of women matched for classical confounding factors. The FVL and FIIG20210A mutations were associated with an increased risk of miscarriage in Caucasian women [odds ratio (OR) 3.19, 95% confidence interval (CI) 2.37-4.30, P < 0.001 and OR 2.36, 95% CI, 1.72-3.24, P < 0.001, respectively]. Among non-Caucasian women, the mutations were rare and the associations with risk of miscarriage less clear. FVL and FIIG20210A mutations were independent risk factors for miscarriages only for women with related clinical signs occurring from the 10th week of gestation on (OR 3.46, 95% CI 2.53-4.72, P < 0.001 and OR 2.60, 95% CI 1.86-3.64, P < 0.001, respectively). These results indicate that FVL and FIIG20210A mutations are associated with a significant risk of spontaneous abortion which clinical signs occur from the 10th week on of the first intended pregnancy.
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High plasma levels of endothelial protein C receptor are associated with the risk of unexplained fetal death. J Thromb Haemost 2005; 3:393-5. [PMID: 15670055 DOI: 10.1111/j.1538-7836.2005.01151.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dequin P, Mercier E, Valat C, Fishman R, Fink J, Smith N, Gibbons K, Diot P. Crit Care 2004; 8:P229. [DOI: 10.1186/cc2696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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